path: root/gcc/analyzer/ChangeLog

2022-05-13  Richard Biener  <rguenther@suse.de>

	* supergraph.cc: Re-order gimple-fold.h include.

2022-05-11  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (state_change_event::get_desc): Call maybe_free
	on label_text temporaries.
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic): Likewise.
	* engine.cc (exploded_graph::~exploded_graph): Fix leak of
	m_per_point_data and m_per_call_string_data values.  Simplify
	cleanup of m_per_function_stats and m_per_point_data values.
	(feasibility_state::maybe_update_for_edge): Fix leak of result of
	superedge::get_description.
	* region-model-manager.cc
	(region_model_manager::~region_model_manager): Move cleanup of
	m_setjmp_values to match the ordering of the fields within
	region_model_manager.  Fix leak of values within
	m_repeated_values_map, m_bits_within_values_map,
	m_asm_output_values_map, and m_const_fn_result_values_map.

2022-04-28  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/105285
	* store.cc (binding_cluster::get_any_binding): Handle accessing
	sub_svalues of clusters where the base region has a symbolic
	binding.

2022-04-28  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (epath_finder::process_worklist_item):
	Call dump_feasible_path when a path that reaches the the target
	enode is found.
	(epath_finder::dump_feasible_path): New.
	* engine.cc (feasibility_state::dump_to_pp): New.
	* exploded-graph.h (feasibility_state::dump_to_pp): New decl.
	* feasible-graph.cc (feasible_graph::dump_feasible_path): New.
	* feasible-graph.h (feasible_graph::dump_feasible_path): New
	decls.
	* program-point.cc (function_point::print): Fix missing trailing
	newlines.
	* program-point.h (program_point::print_source_line): Remove
	unimplemented decl.

2022-04-25  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/105365
	PR analyzer/105366
	* svalue.cc
	(cmp_cst): Rename to...
	(cmp_csts_same_type): ...this.  Convert all recursive calls to
	calls to...
	(cmp_csts_and_types): ....this new function.
	(svalue::cmp_ptr): Update for renaming of cmp_cst

2022-04-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/105264
	* region-model-reachability.cc (reachable_regions::handle_parm):
	Use maybe_get_deref_base_region rather than just region_svalue, to
	handle pointer arithmetic also.
	* svalue.cc (svalue::maybe_get_deref_base_region): New.
	* svalue.h (svalue::maybe_get_deref_base_region): New decl.

2022-04-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/105252
	* svalue.cc (cmp_cst): When comparing VECTOR_CSTs, compare the
	types of the encoded elements before calling cmp_cst on them.

2022-04-09  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/103892
	* region-model-manager.cc
	(region_model_manager::get_unknown_symbolic_region): New,
	extracted from...
	(region_model_manager::get_field_region): ...here.
	(region_model_manager::get_element_region): Use it here.
	(region_model_manager::get_offset_region): Likewise.
	(region_model_manager::get_sized_region): Likewise.
	(region_model_manager::get_cast_region): Likewise.
	(region_model_manager::get_bit_range): Likewise.
	* region-model.h
	(region_model_manager::get_unknown_symbolic_region): New decl.
	* region.cc (symbolic_region::symbolic_region): Handle sval_ptr
	having NULL type.
	(symbolic_region::dump_to_pp): Handle having NULL type.

2022-04-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/102208
	* store.cc (binding_map::remove_overlapping_bindings): Add
	"always_overlap" param, using it to generalize to the case where
	we want to remove all bindings.  Update "uncertainty" logic to
	only record maybe-bound values for cases where there is a symbolic
	write involved.
	(binding_cluster::mark_region_as_unknown): Split param "reg" into
	"reg_to_bind" and "reg_for_overlap".
	(binding_cluster::maybe_get_compound_binding): Pass "false" to
	binding_map::remove_overlapping_bindings new "always_overlap" param.
	(binding_cluster::remove_overlapping_bindings): Determine
	"always_overlap" and pass it to
	binding_map::remove_overlapping_bindings.
	(store::set_value): Pass uncertainty to remove_overlapping_bindings
	call.  Update for new param of
	binding_cluster::mark_region_as_unknown, passing both the base
	region of the iter_cluster, and the lhs_reg.
	(store::mark_region_as_unknown): Update for new param of
	binding_cluster::mark_region_as_unknown, passing "reg" for both.
	(store::remove_overlapping_bindings): Add param "uncertainty", and
	pass it on to call to
	binding_cluster::remove_overlapping_bindings.
	* store.h (binding_map::remove_overlapping_bindings): Add
	"always_overlap" param.
	(binding_cluster::mark_region_as_unknown): Split param "reg" into
	"reg_to_bind" and "reg_for_overlap".
	(store::remove_overlapping_bindings): Add param "uncertainty".

2022-03-29  David Malcolm  <dmalcolm@redhat.com>

	PR testsuite/105085
	* region-model-manager.cc (dump_untracked_region): Skip decls in
	the constant pool.

2022-03-29  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/105087
	* analyzer.h (class conjured_purge): New forward decl.
	* region-model-asm.cc (region_model::on_asm_stmt): Add
	conjured_purge param to calls binding_cluster::on_asm and
	region_model_manager::get_or_create_conjured_svalue.
	* region-model-impl-calls.cc
	(call_details::get_or_create_conjured_svalue): Likewise for call
	to region_model_manager::get_or_create_conjured_svalue.
	(region_model::impl_call_fgets): Remove call to
	region_model::purge_state_involving, as this is now done
	implicitly by call_details::get_or_create_conjured_svalue.
	(region_model::impl_call_fread): Likewise.
	(region_model::impl_call_strchr): Pass conjured_purge param to
	call to region_model_manager::get_or_create_conjured_svalue.
	* region-model-manager.cc (conjured_purge::purge): New.
	(region_model_manager::get_or_create_conjured_svalue): Add
	param "p".  Use it to purge state when reusing an existing
	conjured_svalue.
	* region-model.cc (region_model::on_call_pre): Replace call to
	region_model::purge_state_involving with passing conjured_purge
	to region_model_manager::get_or_create_conjured_svalue.
	(region_model::handle_unrecognized_call): Pass conjured_purge to
	store::on_unknown_fncall.
	* region-model.h
	(region_model_manager::get_or_create_conjured_svalue): Add param
	"p".
	* store.cc (binding_cluster::on_unknown_fncall): Likewise.  Pass
	it on to region_model_manager::get_or_create_conjured_svalue.
	(binding_cluster::on_asm): Likewise.
	(store::on_unknown_fncall): Add param "p" and pass it on to
	binding_cluster::on_unknown_fncall.
	* store.h (binding_cluster::on_unknown_fncall): Add param p.
	(binding_cluster::on_asm): Likewise.
	(store::on_unknown_fncall): Likewise.
	* svalue.h (class conjured_purge): New.

2022-03-29  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/105074
	* region.cc (ipa_ref_requires_tracking): Drop "context_fndecl",
	instead using the ref->referring to get the cgraph node of the
	caller.
	(symnode_requires_tracking_p): Likewise.

2022-03-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/105057
	* store.cc (binding_cluster::make_unknown_relative_to): Reject
	attempts to create a cluster for untracked base regions.
	(store::set_value): Likewise.
	(store::fill_region): Likewise.
	(store::mark_region_as_unknown): Likewise.

2022-03-25  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104954
	* analyzer.opt (-fdump-analyzer-untracked): New option.
	* engine.cc (impl_run_checkers): Handle it.
	* region-model-asm.cc (region_model::on_asm_stmt): Don't attempt
	to clobber regions with !tracked_p ().
	* region-model-manager.cc (dump_untracked_region): New.
	(region_model_manager::dump_untracked_regions): New.
	(frame_region::dump_untracked_regions): New.
	* region-model.h (region_model_manager::dump_untracked_regions):
	New decl.
	* region.cc (ipa_ref_requires_tracking): New.
	(symnode_requires_tracking_p): New.
	(decl_region::calc_tracked_p): New.
	* region.h (region::tracked_p): New vfunc.
	(frame_region::dump_untracked_regions): New decl.
	(class decl_region): Note that this is also used fo SSA names.
	(decl_region::decl_region): Initialize m_tracked.
	(decl_region::tracked_p): New.
	(decl_region::calc_tracked_p): New decl.
	(decl_region::m_tracked): New.
	* store.cc (store::get_or_create_cluster): Assert that we
	don't try to create clusters for base regions that aren't
	trackable.
	(store::mark_as_escaped): Don't mark base regions that we're not
	tracking.

2022-03-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104979
	* engine.cc (impl_run_checkers): Create the engine after the
	supergraph, and pass the supergraph to the engine.
	* region-model.cc (region_model::get_lvalue_1): Pass ctxt to
	frame_region::get_region_for_local.
	(region_model::update_for_return_gcall): Pass the lvalue for the
	result to pop_frame as a tree, rather than as a region.
	(region_model::pop_frame): Update for above change, determining
	the destination region after the frame is popped and thus with
	respect to the caller frame rather than the called frame.
	Likewise, set the value of the region to the return value after
	the frame is popped.
	(engine::engine): Add supergraph pointer.
	(selftest::test_stack_frames): Set the DECL_CONTECT of PARM_DECLs.
	(selftest::test_get_representative_path_var): Likewise.
	(selftest::test_state_merging): Likewise.
	* region-model.h (region_model::pop_frame): Convert first param
	from a const region * to a tree.
	(engine::engine): Add param "sg".
	(engine::m_sg): New field.
	* region.cc: Include "analyzer/sm.h" and
	"analyzer/program-state.h".
	(frame_region::get_region_for_local): Add "ctxt" param.
	Add assertions that VAR_DECLs are locals, and that expr is for the
	correct function.
	* region.h (frame_region::get_region_for_local): Add "ctxt" param.

2022-03-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/105017
	* sm-taint.cc (taint_diagnostic::subclass_equal_p): Check
	m_has_bounds as well as m_arg.
	(tainted_allocation_size::subclass_equal_p): Chain up to base
	class implementation.  Also check m_mem_space.
	(tainted_allocation_size::emit): Add note showing stack-based vs
	heap-based allocations.

2022-03-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104997
	* diagnostic-manager.cc (diagnostic_manager::add_diagnostic):
	Convert return type from "void" to "bool", reporting success vs
	failure to caller, for both overloads.
	* diagnostic-manager.h (diagnostic_manager::add_diagnostic):
	Likewise.
	* engine.cc (impl_region_model_context::warn): Propagate return
	value from diagnostic_manager::add_diagnostic.

2022-03-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104943
	PR analyzer/104954
	PR analyzer/103533
	* analyzer.h (class state_purge_per_decl): New forward decl.
	* engine.cc (impl_run_checkers): Pass region_model_manager to
	state_purge_map ctor.
	* program-point.cc (function_point::final_stmt_p): New.
	(function_point::get_next): New.
	* program-point.h (function_point::final_stmt_p): New decl.
	(function_point::get_next): New decl.
	* program-state.cc (program_state::prune_for_point): Generalize to
	purge local decls as well as SSA names.
	(program_state::can_purge_base_region_p): New.
	* program-state.h (program_state::can_purge_base_region_p): New
	decl.
	* region-model.cc (struct append_ssa_names_cb_data): Rename to...
	(struct append_regions_cb_data): ...this.
	(region_model::get_ssa_name_regions_for_current_frame): Rename
	to...
	(region_model::get_regions_for_current_frame): ...this, updating
	for other renamings.
	(region_model::append_ssa_names_cb): Rename to...
	(region_model::append_regions_cb): ...this, and drop the requirement
	that the subregion be a SSA name.
	* region-model.h (struct append_ssa_names_cb_data): Rename decl
	to...
	(struct append_regions_cb_data): ...this.
	(region_model::get_ssa_name_regions_for_current_frame): Rename
	decl to...
	(region_model::get_regions_for_current_frame): ...this.
	(region_model::append_ssa_names_cb): Rename decl to...
	(region_model::append_regions_cb): ...this.
	* state-purge.cc: Include "tristate.h", "selftest.h",
	"analyzer/store.h", "analyzer/region-model.h", and
	"gimple-walk.h".
	(get_candidate_for_purging): New.
	(class gimple_op_visitor): New.
	(my_load_cb): New.
	(my_store_cb): New.
	(my_addr_cb): New.
	(state_purge_map::state_purge_map): Add "mgr" param.  Update for
	renamings.  Find uses of local variables.
	(state_purge_map::~state_purge_map): Update for renaming of m_map
	to m_ssa_map.  Clean up m_decl_map.
	(state_purge_map::get_or_create_data_for_decl): New.
	(state_purge_per_ssa_name::state_purge_per_ssa_name): Update for
	inheriting from state_purge_per_tree.
	(state_purge_per_ssa_name::add_to_worklist): Likewise.
	(state_purge_per_decl::state_purge_per_decl): New.
	(state_purge_per_decl::add_needed_at): New.
	(state_purge_per_decl::add_pointed_to_at): New.
	(state_purge_per_decl::process_worklists): New.
	(state_purge_per_decl::add_to_worklist): New.
	(same_binding_p): New.
	(fully_overwrites_p): New.
	(state_purge_per_decl::process_point_backwards): New.
	(state_purge_per_decl::process_point_forwards): New.
	(state_purge_per_decl::needed_at_point_p): New.
	(state_purge_annotator::print_needed): Generalize to print local
	decls as well as SSA names.
	* state-purge.h (class state_purge_map): Update leading comment.
	(state_purge_map::map_t): Rename to...
	(state_purge_map::ssa_map_t): ...this.
	(state_purge_map::iterator): Rename to...
	(state_purge_map::ssa_iterator): ...this.
	(state_purge_map::decl_map_t): New typedef.
	(state_purge_map::decl_iterator): New typedef.
	(state_purge_map::state_purge_map): Add "mgr" param.
	(state_purge_map::get_data_for_ssa_name): Update for renaming.
	(state_purge_map::get_any_data_for_decl): New.
	(state_purge_map::get_or_create_data_for_decl): New decl.
	(state_purge_map::begin): Rename to...
	(state_purge_map::begin_ssas): ...this.
	(state_purge_map::end): Rename to...
	(state_purge_map::end_ssa): ...this.
	(state_purge_map::begin_decls): New.
	(state_purge_map::end_decls): New.
	(state_purge_map::m_map): Rename to...
	(state_purge_map::m_ssa_map): ...this.
	(state_purge_map::m_decl_map): New field.
	(class state_purge_per_tree): New class.
	(class state_purge_per_ssa_name): Inherit from state_purge_per_tree.
	(state_purge_per_ssa_name::get_function): Move to base class.
	(state_purge_per_ssa_name::point_set_t): Likewise.
	(state_purge_per_ssa_name::m_fun): Likewise.
	(class state_purge_per_decl): New.

2022-03-17  David Malcolm  <dmalcolm@redhat.com>

	* state-purge.cc (state_purge_annotator::add_node_annotations):
	Avoid duplicate before-supernode annotations when returning from
	an interprocedural call.  Show after-supernode annotations.

2022-03-17  David Malcolm  <dmalcolm@redhat.com>

	* program-point.cc (program_point::get_next): Fix missing
	increment of index.

2022-03-16  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104955
	* diagnostic-manager.cc (get_emission_location): New.
	(diagnostic_manager::diagnostic_manager): Initialize
	m_num_disabled_diagnostics.
	(diagnostic_manager::add_diagnostic): Reject diagnostics that
	will eventually be rejected due to being disabled.
	(diagnostic_manager::emit_saved_diagnostics): Log the number
	of disabled diagnostics.
	(diagnostic_manager::emit_saved_diagnostic): Split out logic for
	determining emission location to get_emission_location.
	* diagnostic-manager.h
	(diagnostic_manager::m_num_disabled_diagnostics): New field.
	* engine.cc (stale_jmp_buf::get_controlling_option): New.
	(stale_jmp_buf::emit): Use it.
	* pending-diagnostic.h
	(pending_diagnostic::get_controlling_option): New vfunc.
	* region-model.cc
	(poisoned_value_diagnostic::get_controlling_option): New.
	(poisoned_value_diagnostic::emit): Use it.
	(shift_count_negative_diagnostic::get_controlling_option): New.
	(shift_count_negative_diagnostic::emit): Use it.
	(shift_count_overflow_diagnostic::get_controlling_option): New.
	(shift_count_overflow_diagnostic::emit): Use it.
	(dump_path_diagnostic::get_controlling_option): New.
	(dump_path_diagnostic::emit): Use it.
	(write_to_const_diagnostic::get_controlling_option): New.
	(write_to_const_diagnostic::emit): Use it.
	(write_to_string_literal_diagnostic::get_controlling_option): New.
	(write_to_string_literal_diagnostic::emit): Use it.
	* sm-file.cc (double_fclose::get_controlling_option): New.
	(double_fclose::emit): Use it.
	(file_leak::get_controlling_option): New.
	(file_leak::emit): Use it.
	* sm-malloc.cc (mismatching_deallocation::get_controlling_option):
	New.
	(mismatching_deallocation::emit): Use it.
	(double_free::get_controlling_option): New.
	(double_free::emit): Use it.
	(possible_null_deref::get_controlling_option): New.
	(possible_null_deref::emit): Use it.
	(possible_null_arg::get_controlling_option): New.
	(possible_null_arg::emit): Use it.
	(null_deref::get_controlling_option): New.
	(null_deref::emit): Use it.
	(null_arg::get_controlling_option): New.
	(null_arg::emit): Use it.
	(use_after_free::get_controlling_option): New.
	(use_after_free::emit): Use it.
	(malloc_leak::get_controlling_option): New.
	(malloc_leak::emit): Use it.
	(free_of_non_heap::get_controlling_option): New.
	(free_of_non_heap::emit): Use it.
	* sm-pattern-test.cc (pattern_match::get_controlling_option): New.
	(pattern_match::emit): Use it.
	* sm-sensitive.cc
	(exposure_through_output_file::get_controlling_option): New.
	(exposure_through_output_file::emit): Use it.
	* sm-signal.cc (signal_unsafe_call::get_controlling_option): New.
	(signal_unsafe_call::emit): Use it.
	* sm-taint.cc (tainted_array_index::get_controlling_option): New.
	(tainted_array_index::emit): Use it.
	(tainted_offset::get_controlling_option): New.
	(tainted_offset::emit): Use it.
	(tainted_size::get_controlling_option): New.
	(tainted_size::emit): Use it.
	(tainted_divisor::get_controlling_option): New.
	(tainted_divisor::emit): Use it.
	(tainted_allocation_size::get_controlling_option): New.
	(tainted_allocation_size::emit): Use it.

2022-03-15  David Malcolm  <dmalcolm@redhat.com>

	* store.cc (store::store): Presize m_cluster_map.

2022-03-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104863
	* constraint-manager.cc (constraint_manager::add_constraint):
	Refresh the EC IDs when adding constraints implied by offsets.

2022-03-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104793
	* analyzer.h (class pending_note): New forward decl.
	* diagnostic-manager.cc (saved_diagnostic::saved_diagnostic):
	Initialize m_notes.
	(saved_diagnostic::operator==): Compare m_notes.
	(saved_diagnostic::add_note): New.
	(saved_diagnostic::emit_any_notes): New.
	(diagnostic_manager::add_note): New.
	(diagnostic_manager::emit_saved_diagnostic): Call emit_any_notes
	after emitting the warning.
	* diagnostic-manager.h (saved_diagnostic::add_note): New decl.
	(saved_diagnostic::emit_any_notes): New decl.
	(saved_diagnostic::m_notes): New field.
	(diagnostic_manager::add_note): New decl.
	* engine.cc (impl_region_model_context::add_note): New.
	* exploded-graph.h (impl_region_model_context::add_note): New
	decl.
	* pending-diagnostic.h (class pending_note): New.
	(class pending_note_subclass): New template.
	* region-model.cc (class reason_attr_access): New.
	(check_external_function_for_access_attr): Add class
	annotating_ctxt and use it when checking region.
	(noop_region_model_context::add_note): New.
	* region-model.h (region_model_context::add_note): New vfunc.
	(noop_region_model_context::add_note): New decl.
	(class region_model_context_decorator): New.
	(class note_adding_context): New.

2022-03-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104793
	* region-model.cc
	(region_model::check_external_function_for_access_attr): New.
	(region_model::handle_unrecognized_call): Call it.
	* region-model.h
	(region_model::check_external_function_for_access_attr): New decl.
	(region_model::handle_unrecognized_call): New decl.

2022-03-10  David Malcolm  <dmalcolm@redhat.com>

	* sm-taint.cc (taint_state_machine::check_for_tainted_size_arg):
	Avoid generating duplicate saved_diagnostics by only handling the
	rdwr_map entry for the ptrarg, not the duplicate entry for the
	sizarg.

2022-03-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101983
	* engine.cc (returning_from_function_p): New.
	(impl_region_model_context::on_state_leak): Use it when rejecting
	leaks at the return from "main".

2022-03-07  Jakub Jelinek  <jakub@redhat.com>

	* store.cc: Fix up duplicated word issue in a comment.
	* analyzer.cc: Likewise.
	* engine.cc: Likewise.
	* sm-taint.cc: Likewise.

2022-03-04  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/103521
	* analyzer.opt (-param=analyzer-max-svalue-depth=): Reduce from 13
	to 12.

2022-02-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104434
	* analyzer.h (class const_fn_result_svalue): New decl.
	* region-model-impl-calls.cc (call_details::get_manager): New.
	* region-model-manager.cc
	(region_model_manager::get_or_create_const_fn_result_svalue): New.
	(region_model_manager::log_stats): Log
	m_const_fn_result_values_map.
	* region-model.cc (const_fn_p): New.
	(maybe_get_const_fn_result): New.
	(region_model::on_call_pre): Handle fndecls with
	__attribute__((const)) by calling the above rather than making
	a conjured_svalue.
	* region-model.h (visitor::visit_const_fn_result_svalue): New.
	(region_model_manager::get_or_create_const_fn_result_svalue): New
	decl.
	(region_model_manager::const_fn_result_values_map_t): New typedef.
	(region_model_manager::m_const_fn_result_values_map): New field.
	(call_details::get_manager): New decl.
	* svalue.cc (svalue::cmp_ptr): Handle SK_CONST_FN_RESULT.
	(const_fn_result_svalue::dump_to_pp): New.
	(const_fn_result_svalue::dump_input): New.
	(const_fn_result_svalue::accept): New.
	* svalue.h (enum svalue_kind): Add SK_CONST_FN_RESULT.
	(svalue::dyn_cast_const_fn_result_svalue): New.
	(class const_fn_result_svalue): New.
	(is_a_helper <const const_fn_result_svalue *>::test): New.
	(template <> struct default_hash_traits<const_fn_result_svalue::key_t>):
	New.

2022-02-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104576
	* region-model.cc: Include "calls.h".
	(region_model::on_call_pre): Use flags_from_decl_or_type to
	generalize check for DECL_PURE_P to also check for ECF_CONST.

2022-02-16  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104560
	* diagnostic-manager.cc (diagnostic_manager::build_emission_path):
	Add region creation events for globals of interest.
	(null_assignment_sm_context::get_old_program_state): New.
	(diagnostic_manager::add_events_for_eedge): Move check for
	changing dynamic extents from PK_BEFORE_STMT case to after the
	switch on the dst_point's kind so that we can emit them for the
	final stmt in a basic block.
	* engine.cc (impl_sm_context::get_old_program_state): New.
	* sm-malloc.cc (malloc_state_machine::get_default_state): Rewrite
	detection of m_non_heap to use get_memory_space.
	(free_of_non_heap::free_of_non_heap): Add freed_reg param.
	(free_of_non_heap::subclass_equal_p): Update for changes to
	fields.
	(free_of_non_heap::emit): Drop m_kind in favor of
	get_memory_space.
	(free_of_non_heap::describe_state_change): Remove logic for
	detecting alloca.
	(free_of_non_heap::mark_interesting_stuff): Add region-creation of
	m_freed_reg.
	(free_of_non_heap::get_memory_space): New.
	(free_of_non_heap::kind): Drop enum.
	(free_of_non_heap::m_freed_reg): New field.
	(free_of_non_heap::m_kind): Drop field.
	(malloc_state_machine::on_stmt): Drop transition to m_non_heap.
	(malloc_state_machine::handle_free_of_non_heap): New function,
	split out from on_deallocator_call and on_realloc_call, adding
	detection of the freed region.
	(malloc_state_machine::on_deallocator_call): Use it.
	(malloc_state_machine::on_realloc_call): Likewise.
	* sm.h (sm_context::get_old_program_state): New vfunc.

2022-02-15  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104524
	* region-model-manager.cc
	(region_model_manager::maybe_fold_sub_svalue): Only call
	get_or_create_cast if type is non-NULL.

2022-02-15  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/102692
	* exploded-graph.h (impl_region_model_context::get_stmt): New.
	* region-model.cc: Include "gimple-ssa.h", "tree-phinodes.h",
	"tree-ssa-operands.h", and "ssa-iterators.h".
	(within_short_circuited_stmt_p): New.
	(region_model::check_for_poison): Don't warn about uninit values
	if within_short_circuited_stmt_p.
	* region-model.h (region_model_context::get_stmt): New vfunc.
	(noop_region_model_context::get_stmt): New.

2022-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104274
	* region-model.cc (region_model::check_for_poison): Ignore
	uninitialized uses of empty types.

2022-02-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98797
	* region-model-manager.cc
	(region_model_manager::maybe_fold_sub_svalue): Generalize getting
	individual chars of a STRING_CST from element_region to any
	subregion which is a concrete access of a single byte from its
	parent region.
	* region.cc (region::get_relative_concrete_byte_range): New.
	* region.h (region::get_relative_concrete_byte_range): New decl.

2022-02-09  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104452
	* region-model.cc (selftest::test_bit_range_regions): New.
	(selftest::analyzer_region_model_cc_tests): Call it.
	* region.h (bit_range_region::key_t::hash): Fix hashing of m_bits
	to avoid using uninitialized data.

2022-02-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104417
	* sm-taint.cc (tainted_allocation_size::tainted_allocation_size):
	Remove overzealous assertion.
	(tainted_allocation_size::emit): Likewise.
	(region_model::check_dynamic_size_for_taint): Likewise.

2022-02-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/103872
	* region-model-impl-calls.cc (region_model::impl_call_memcpy):
	Reimplement in terms of a get_store_value followed by a set_value.

2022-02-03  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104369
	* engine.cc (exploded_graph::process_node): Use the node for any
	diagnostics, avoiding ICE if a bifurcation update adds a
	saved_diagnostic, such as for a tainted realloc size.
	* region-model-impl-calls.cc
	(region_model::impl_call_realloc::success_no_move::update_model):
	Require the old pointer to be non-NULL to be able successfully
	grow in place.  Use model->deref_rvalue rather than maybe_get_region
	to support the old pointer being symbolic.
	(region_model::impl_call_realloc::success_with_move::update_model):
	Likewise.  Add a constraint that the new pointer != the old pointer.
	Use a sized_region when setting the value of the new region.
	Handle the case where we don't know the dynamic size of the old
	region by marking the new region as unknown.
	* sm-taint.cc (tainted_allocation_size::tainted_allocation_size):
	Update assertion to also allow for MEMSPACE_UNKNOWN.
	(tainted_allocation_size::emit): Likewise.
	(region_model::check_dynamic_size_for_taint): Likewise.

2022-02-03  David Malcolm  <dmalcolm@redhat.com>

	* region-model-impl-calls.cc (region_model::impl_call_calloc): Use
	a sized_region when calling zero_fill_region.

2022-02-02  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::on_return): Replace usage of
	copy_region with get_rvalue/set_value pair.
	(region_model::pop_frame): Likewise.
	(selftest::test_compound_assignment): Likewise.
	* region-model.h (region_model::copy_region): Delete decl.
	* region.cc (region_model::copy_region): Delete.

2022-02-02  David Malcolm  <dmalcolm@redhat.com>

	* region.cc (region::calc_offset): Consolidate effectively
	identical cases.

2022-02-02  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (class bit_range_region): New forward decl.
	* region-model-manager.cc (region_model_manager::get_bit_range):
	New.
	(region_model_manager::log_stats): Handle m_bit_range_regions.
	* region-model.cc (region_model::get_lvalue_1): Handle
	BIT_FIELD_REF.
	* region-model.h (region_model_manager::get_bit_range): New decl.
	(region_model_manager::m_bit_range_regions): New field.
	* region.cc (region::get_base_region): Handle RK_BIT_RANGE.
	(region::base_region_p): Likewise.
	(region::calc_offset): Likewise.
	(bit_range_region::dump_to_pp): New.
	(bit_range_region::get_byte_size): New.
	(bit_range_region::get_bit_size): New.
	(bit_range_region::get_byte_size_sval): New.
	(bit_range_region::get_relative_concrete_offset): New.
	* region.h (enum region_kind): Add RK_BIT_RANGE.
	(region::dyn_cast_bit_range_region): New vfunc.
	(class bit_range_region): New.
	(is_a_helper <const bit_range_region *>::test): New.
	(default_hash_traits<bit_range_region::key_t>): New.

2022-02-02  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104270
	* region-model.cc (region_model::on_call_pre): Handle
	IFN_DEFERRED_INIT.

2022-01-27  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (event_kind_to_string): Handle
	EK_REGION_CREATION.
	(region_creation_event::region_creation_event): New.
	(region_creation_event::get_desc): New.
	(checker_path::add_region_creation_event): New.
	* checker-path.h (enum event_kind): Add EK_REGION_CREATION.
	(class region_creation_event): New subclass.
	(checker_path::add_region_creation_event): New decl.
	* diagnostic-manager.cc
	(diagnostic_manager::emit_saved_diagnostic): Pass NULL for new
	param to add_events_for_eedge when handling trailing eedge.
	(diagnostic_manager::build_emission_path): Create an interesting_t
	instance, allow the pending diagnostic to populate it, and pass it
	to the calls to add_events_for_eedge.
	(diagnostic_manager::add_events_for_eedge): Add "interest" param.
	Use it to add region_creation_events for on-stack regions created
	within at function entry, and when pertinent dynamically-sized
	regions are created.
	(diagnostic_manager::prune_for_sm_diagnostic): Add case for
	EK_REGION_CREATION.
	* diagnostic-manager.h (diagnostic_manager::add_events_for_eedge):
	Add "interest" param.
	* pending-diagnostic.cc: Include "selftest.h", "tristate.h",
	"analyzer/call-string.h", "analyzer/program-point.h",
	"analyzer/store.h", and "analyzer/region-model.h".
	(interesting_t::add_region_creation): New.
	(interesting_t::dump_to_pp): New.
	* pending-diagnostic.h (struct interesting_t): New.
	(pending_diagnostic::mark_interesting_stuff): New vfunc.
	* region-model.cc
	(poisoned_value_diagnostic::poisoned_value_diagnostic): Add
	(poisoned_value_diagnostic::operator==): Compare m_pkind and
	m_src_region fields.
	(poisoned_value_diagnostic::mark_interesting_stuff): New.
	(poisoned_value_diagnostic::m_src_region): New.
	(region_model::check_for_poison): Call
	get_region_for_poisoned_expr for uninit values and pass the resul
	to the diagnostic.
	(region_model::get_region_for_poisoned_expr): New.
	(region_model::deref_rvalue): Pass NULL for
	poisoned_value_diagnostic's src_region.
	* region-model.h (region_model::get_region_for_poisoned_expr): New
	decl.
	* region.h (frame_region::get_fndecl): New.

2022-01-27  Martin Liska  <mliska@suse.cz>

	PR analyzer/104247
	* constraint-manager.cc (bounded_ranges_manager::log_stats):
	Cast to long for format purpose.
	* region-model-manager.cc (log_uniq_map): Likewise.

2022-01-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104224
	* region-model.cc (region_model::check_call_args): New.
	(region_model::on_call_pre): Call it when ignoring stdio builtins.
	* region-model.h (region_model::check_call_args): New decl

2022-01-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94362
	* constraint-manager.cc (range::add_bound): Fix tests for
	discarding redundant constraints.  Perform test for rejecting
	unsatisfiable constraints earlier so that they don't update
	the object on failure.
	(selftest::test_range): New.
	(selftest::test_constant_comparisons): Add test coverage for
	existing constraints becoming narrower until they are
	unsatisfiable.
	(selftest::run_constraint_manager_tests): Call test_range.

2022-01-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104159
	* region-model-manager.cc
	(region_model_manager::get_or_create_cast): Bail out if the types
	are the same.  Don't attempt to handle casts involving vector
	types.

2022-01-20  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94362
	* constraint-manager.cc (bound::ensure_closed): Convert param to
	enum bound_kind.
	(range::constrained_to_single_element): Likewise.
	(range::add_bound): New.
	(constraint_manager::add_constraint): Handle SVAL + OFFSET
	compared to a constant.
	(constraint_manager::get_ec_bounds): Rewrite in terms of
	range::add_bound.
	(constraint_manager::eval_condition): Reject if range::add_bound
	fails.
	(selftest::test_constant_comparisons): Add test coverage for
	various impossible combinations of integer comparisons.
	* constraint-manager.h (enum bound_kind): New.
	(struct bound): Likewise.
	(bound::ensure_closed): Convert to param to enum bound_kind.
	(struct range): Convert to...
	(class range): ...this, making fields private.
	(range::add_bound): New decls.
	* region-model.cc (region_model::add_constraint): Fail if
	constraint_manager::add_constraint fails.

2022-01-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104089
	* region-model-manager.cc
	(region_model_manager::get_or_create_constant_svalue): Assert that
	we have a CONSTANT_CLASS_P.
	(region_model_manager::maybe_fold_unaryop): Only fold a constant
	when fold_unary's result is a constant or a cast of a constant.

2022-01-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104062
	* region-model-manager.cc
	(region_model_manager::maybe_fold_sub_svalue): Avoid casting to
	NULL type when folding access to repeated svalue.

2022-01-17  Martin Liska  <mliska@suse.cz>

	* analyzer.cc (is_special_named_call_p): Rename .c names to .cc.
	(is_named_call_p): Likewise.
	* region-model-asm.cc (deterministic_p): Likewise.
	* region.cc (field_region::get_relative_concrete_offset): Likewise.
	* sm-malloc.cc (method_p): Likewise.
	* supergraph.cc (superedge::dump_dot): Likewise.

2022-01-14  David Malcolm  <dmalcolm@redhat.com>

	* sm-taint.cc (taint_state_machine::combine_states): Handle combination
	of has_ub and has_lb.

2022-01-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/104029
	* sm-taint.cc (taint_state_machine::alt_get_inherited_state):
	Remove gcc_unreachable from default case for unary ops.

2022-01-14  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc: Include "stringpool.h", "attribs.h", and
	"tree-dfa.h".
	(mark_params_as_tainted): New.
	(class tainted_args_function_custom_event): New.
	(class tainted_args_function_info): New.
	(exploded_graph::add_function_entry): Handle functions with
	"tainted_args" attribute.
	(class tainted_args_field_custom_event): New.
	(class tainted_args_callback_custom_event): New.
	(class tainted_args_call_info): New.
	(add_tainted_args_callback): New.
	(add_any_callbacks): New.
	(exploded_graph::build_initial_worklist): Likewise.
	(exploded_graph::build_initial_worklist): Find callbacks that are
	reachable from global initializers, calling add_any_callbacks on
	them.

2022-01-12  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/103940
	* engine.cc (impl_sm_context::impl_sm_context): Add
	"unknown_side_effects" param and use it to initialize
	new m_unknown_side_effects field.
	(impl_sm_context::unknown_side_effects_p): New.
	(impl_sm_context::m_unknown_side_effects): New.
	(exploded_node::on_stmt): Pass unknown_side_effects to sm_ctxt
	ctor.
	* sm-taint.cc: Include "stringpool.h" and "attribs.h".
	(tainted_size::tainted_size): Drop "dir" param.
	(tainted_size::get_kind): Drop "FINAL".
	(tainted_size::emit): Likewise.
	(tainted_size::m_dir): Drop unused field.
	(class tainted_access_attrib_size): New subclass.
	(taint_state_machine::on_stmt): Call check_for_tainted_size_arg on
	external functions with unknown side effects.
	(taint_state_machine::check_for_tainted_size_arg): New.
	(region_model::check_region_for_taint): Drop "dir" param from
	tainted_size ctor.
	* sm.h (sm_context::unknown_side_effects_p): New.

2022-01-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/102692
	* diagnostic-manager.cc
	(class auto_disable_complexity_checks): Rename to...
	(class auto_checking_feasibility): ...this, updating
	the calls accordingly.
	(epath_finder::explore_feasible_paths): Update for renaming.
	* region-model-manager.cc
	(region_model_manager::region_model_manager): Update for change from
	m_check_complexity to m_checking_feasibility.
	(region_model_manager::reject_if_too_complex): Likewise.
	(region_model_manager::get_or_create_unknown_svalue): Handle
	m_checking_feasibility.
	(region_model_manager::create_unique_svalue): New.
	(region_model_manager::maybe_fold_binop): Handle BIT_AND_EXPR and
	BIT_IOR_EXPRs on booleans where we know the result.
	* region-model.cc (test_binop_svalue_folding): Add test coverage
	for the above.
	* region-model.h (region_model_manager::create_unique_svalue): New
	decl.
	(region_model_manager::enable_complexity_check): Replace with...
	(region_model_manager::begin_checking_feasibility): ...this.
	(region_model_manager::disable_complexity_check): Replace with...
	(region_model_manager::end_checking_feasibility): ...this.
	(region_model_manager::m_check_complexity): Replace with...
	(region_model_manager::m_checking_feasibility): ...this.
	(region_model_manager::m_managed_dynamic_svalues): New field.

2022-01-08  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (impl_run_checkers): Pass logger to engine ctor.
	* region-model-manager.cc
	(region_model_manager::region_model_manager): Add logger param and
	use it to initialize m_logger.
	* region-model.cc (engine::engine): New.
	* region-model.h (region_model_manager::region_model_manager):
	Add logger param.
	(region_model_manager::get_logger): New.
	(region_model_manager::m_logger): New field.
	(engine::engine): New.
	* store.cc (store_manager::get_logger): New.
	(store::set_value): Log scope.  Log when marking a cluster as
	unknown due to possible aliasing.
	* store.h (store_manager::get_logger): New decl.

2022-01-08  David Malcolm  <dmalcolm@redhat.com>

	* region-model-impl-calls.cc (cmp_decls): New.
	(cmp_decls_ptr_ptr): New.
	(region_model::impl_call_analyzer_dump_escaped): New.
	* region-model.cc (region_model::on_stmt_pre): Handle
	__analyzer_dump_escaped.
	* region-model.h (region_model::impl_call_analyzer_dump_escaped):
	New decl.
	* store.h (binding_cluster::get_base_region): New accessor.

2022-01-08  David Malcolm  <dmalcolm@redhat.com>

	* region.cc (region::is_named_decl_p): New.
	* region.h (region::is_named_decl_p): New decl.

2022-01-06  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/103546
	* store.cc (store::eval_alias_1): Refactor handling of decl
	regions, adding a test for may_be_aliased, rejecting those for
	which it returns false.

2021-12-12  Jonathan Wakely  <jwakely@redhat.com>

	* engine.cc: Define INCLUDE_MEMORY instead of INCLUDE_UNIQUE_PTR.

2021-12-06  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/103533
	* constraint-manager.cc (equiv_class::contains_non_constant_p):
	New.
	(constraint_manager::canonicalize): Call it when determining
	redundant ECs.
	(selftest::test_purging): New selftest.
	(selftest::run_constraint_manager_tests): Likewise.
	* constraint-manager.h (equiv_class::contains_non_constant_p):
	New decl.

2021-12-01  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/102471
	* region-model-reachability.cc (reachable_regions::handle_parm):
	Treat all svalues within a compound parm has reachable, and those
	wrapped in a cast.

2021-11-29  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/103217
	* store.cc (binding_cluster::can_merge_p): For the "key is bound"
	vs "key is not bound" merger case, check that the bound svalue
	is mergeable before merging it to "unknown", rejecting the merger
	otherwise.

2021-11-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/103217
	* engine.cc (exploded_graph::get_or_create_node): Pass in
	m_ext_state to program_state::can_merge_with_p.
	(exploded_graph::process_worklist): Likewise.
	(exploded_graph::maybe_process_run_of_before_supernode_enodes):
	Likewise.
	(exploded_graph::process_node): Add missing call to detect_leaks
	when handling phi nodes.
	* program-state.cc (program_state::can_merge_with_p): Add
	"ext_state" param.  Pass it and state ptrs to
	region_model::can_merge_with_p.
	(selftest::test_program_state_merging): Update for new ext_state
	param of program_state::can_merge_with_p.
	(selftest::test_program_state_merging_2): Likewise.
	* program-state.h (program_state::can_purge_p): Make const.
	(program_state::can_merge_with_p): Add "ext_state" param.
	* region-model.cc: Include "analyzer/program-state.h".
	(region_model::can_merge_with_p): Add params "ext_state",
	"state_a", and "state_b", use them when creating model_merger
	object.
	(model_merger::mergeable_svalue_p): New.
	* region-model.h (region_model::can_merge_with_p): Add params
	"ext_state", "state_a", and "state_b".
	(model_merger::model_merger) Likewise, initializing new fields.
	(model_merger::mergeable_svalue_p): New decl.
	(model_merger::m_ext_state): New field.
	(model_merger::m_state_a): New field.
	(model_merger::m_state_b): New field.
	* svalue.cc (svalue::can_merge_p): Call
	model_merger::mergeable_svalue_p on both states and reject the
	merger accordingly.

2021-11-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/102695
	* region-model-impl-calls.cc (region_model::impl_call_strchr): New.
	* region-model-manager.cc
	(region_model_manager::maybe_fold_unaryop): Simplify cast to
	pointer type of an existing pointer to a region.
	* region-model.cc (region_model::on_call_pre): Handle
	BUILT_IN_STRCHR and "strchr".
	(write_to_const_diagnostic::emit): Add auto_diagnostic_group.  Add
	alternate wordings for functions and labels.
	(write_to_const_diagnostic::describe_final_event): Add alternate
	wordings for functions and labels.
	(region_model::check_for_writable_region): Handle RK_FUNCTION and
	RK_LABEL.
	* region-model.h (region_model::impl_call_strchr): New decl.

2021-11-16  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/102662
	* constraint-manager.cc (bounded_range::operator==): Require the
	types to be the same for equality.

2021-11-13  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.opt (Wanalyzer-tainted-allocation-size): New.
	(Wanalyzer-tainted-divisor): New.
	(Wanalyzer-tainted-offset): New.
	(Wanalyzer-tainted-size): New.
	* engine.cc (impl_region_model_context::get_taint_map): New.
	* exploded-graph.h (impl_region_model_context::get_taint_map):
	New decl.
	* program-state.cc (sm_state_map::get_state): Call
	alt_get_inherited_state.
	(sm_state_map::impl_set_state): Modify states within
	compound svalues.
	(program_state::impl_call_analyzer_dump_state): Undo casts.
	(selftest::test_program_state_1): Update for new context param of
	create_region_for_heap_alloc.
	(selftest::test_program_state_merging): Likewise.
	* region-model-impl-calls.cc (region_model::impl_call_alloca):
	Likewise.
	(region_model::impl_call_calloc): Likewise.
	(region_model::impl_call_malloc): Likewise.
	(region_model::impl_call_operator_new): Likewise.
	(region_model::impl_call_realloc): Likewise.
	* region-model.cc (region_model::check_region_access): Call
	check_region_for_taint.
	(region_model::get_representative_path_var_1): Handle binops.
	(region_model::create_region_for_heap_alloc): Add "ctxt" param and
	pass it to set_dynamic_extents.
	(region_model::create_region_for_alloca): Likewise.
	(region_model::set_dynamic_extents): Add "ctxt" param and use it
	to call check_dynamic_size_for_taint.
	(selftest::test_state_merging): Update for new context param of
	create_region_for_heap_alloc.
	(selftest::test_malloc_constraints): Likewise.
	(selftest::test_malloc): Likewise.
	(selftest::test_alloca): Likewise for create_region_for_alloca.
	* region-model.h (region_model::create_region_for_heap_alloc): Add
	"ctxt" param.
	(region_model::create_region_for_alloca): Likewise.
	(region_model::set_dynamic_extents): Likewise.
	(region_model::check_dynamic_size_for_taint): New decl.
	(region_model::check_region_for_taint): New decl.
	(region_model_context::get_taint_map): New vfunc.
	(noop_region_model_context::get_taint_map): New.
	* sm-taint.cc: Remove include of "diagnostic-event-id.h"; add
	includes of "gimple-iterator.h", "tristate.h", "selftest.h",
	"ordered-hash-map.h", "cgraph.h", "cfg.h", "digraph.h",
	"analyzer/supergraph.h", "analyzer/call-string.h",
	"analyzer/program-point.h", "analyzer/store.h",
	"analyzer/region-model.h", and "analyzer/program-state.h".
	(enum bounds): Move to top of file.
	(class taint_diagnostic): New.
	(class tainted_array_index): Convert to subclass of taint_diagnostic.
	(tainted_array_index::emit): Add CWE-129.  Reword warning to use
	"attacker-controlled" rather than "tainted".
	(tainted_array_index::describe_state_change): Move to
	taint_diagnostic::describe_state_change.
	(tainted_array_index::describe_final_event): Reword to use
	"attacker-controlled" rather than "tainted".
	(class tainted_offset): New.
	(class tainted_size): New.
	(class tainted_divisor): New.
	(class tainted_allocation_size): New.
	(taint_state_machine::alt_get_inherited_state): New.
	(taint_state_machine::on_stmt): In assignment handling, remove
	ARRAY_REF handling in favor of check_region_for_taint.  Add
	detection of tainted divisors.
	(taint_state_machine::get_taint): New.
	(taint_state_machine::combine_states): New.
	(region_model::check_region_for_taint): New.
	(region_model::check_dynamic_size_for_taint): New.
	* sm.h (state_machine::alt_get_inherited_state): New.

2021-11-12  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::on_stmt_pre): Return when handling
	"__analyzer_dump_state".

2021-11-11  Richard Biener  <rguenther@suse.de>

	* supergraph.cc: Include bitmap.h.

2021-11-04  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (sm_state_map::dump): Use default_tree_printer
	as format decoder.

2021-09-16  Maxim Blinov  <maxim.blinov@embecosm.com>

	PR bootstrap/102242
	* engine.cc (INCLUDE_UNIQUE_PTR): Define.

2021-09-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/102225
	* analyzer.h (compat_types_p): New decl.
	* constraint-manager.cc
	(constraint_manager::get_or_add_equiv_class): Guard against NULL
	type when checking for pointer types.
	* region-model-impl-calls.cc (region_model::impl_call_realloc):
	Guard against NULL lhs type/region.  Guard against the size value
	not being of a compatible type for dynamic extents.
	* region-model.cc (compat_types_p): Make non-static.

2021-08-30  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99260
	* analyzer.h (class custom_edge_info): New class, adapted from
	exploded_edge::custom_info_t.  Make member functions const.
	Make update_model return bool, converting edge param from
	reference to a pointer, and adding a ctxt param.
	(class path_context): New class.
	* call-info.cc: New file.
	* call-info.h: New file.
	* engine.cc: Include "analyzer/call-info.h" and <memory>.
	(impl_region_model_context::impl_region_model_context): Update for
	new m_path_ctxt field.
	(impl_region_model_context::bifurcate): New.
	(impl_region_model_context::terminate_path): New.
	(impl_region_model_context::get_malloc_map): New.
	(impl_sm_context::impl_sm_context): Update for new m_path_ctxt
	field.
	(impl_sm_context::get_fndecl_for_call): Likewise.
	(impl_sm_context::set_next_state): Likewise.
	(impl_sm_context::warn): Likewise.
	(impl_sm_context::is_zero_assignment): Likewise.
	(impl_sm_context::get_path_context): New.
	(impl_sm_context::m_path_ctxt): New.
	(impl_region_model_context::on_condition): Update for new
	path_ctxt param.  Handle m_enode_for_diag being NULL.
	(impl_region_model_context::on_phi): Update for new path_ctxt
	param.
	(exploded_node::on_stmt): Add path_ctxt param, updating ctor calls
	to use it as necessary.  Use it to bail out after sm-handling,
	if needed.
	(exploded_node::detect_leaks): Update for new path_ctxt param.
	(dynamic_call_info_t::update_model): Update for conversion of
	exploded_edge::custom_info_t to custom_edge_info.
	(dynamic_call_info_t::add_events_to_path): Likewise.
	(rewind_info_t::update_model): Likewise.
	(rewind_info_t::add_events_to_path): Likewise.
	(exploded_edge::exploded_edge): Likewise.
	(exploded_graph::add_edge): Likewise.
	(exploded_graph::maybe_process_run_of_before_supernode_enodes):
	Update for new path_ctxt param.
	(class impl_path_context): New.
	(exploded_graph::process_node): Update for new path_ctxt param.
	Create an impl_path_context and pass it to exploded_node::on_stmt.
	Use it to terminate iterating stmts if terminate_path is called
	on it.  After processing a run of stmts, query path_ctxt to
	potentially terminate the analysis path, and/or to "bifurcate" the
	analysis into multiple additional paths.
	(feasibility_state::maybe_update_for_edge): Update for new
	update_model ctxt param.
	* exploded-graph.h
	(impl_region_model_context::impl_region_model_context): Add
	path_ctxt param.
	(impl_region_model_context::bifurcate): New.
	(impl_region_model_context::terminate_path): New
	(impl_region_model_context::get_ext_state): New.
	(impl_region_model_context::get_malloc_map): New.
	(impl_region_model_context::m_path_ctxt): New field.
	(exploded_node::on_stmt): Add path_ctxt param.
	(class exploded_edge::custom_info_t): Move to analyzer.h, renaming
	to custom_edge_info, and making the changes as noted in analyzer.h
	above.
	(exploded_edge::exploded_edge): Update for these changes to
	exploded_edge::custom_info_t.
	(exploded_edge::m_custom_info): Likewise.
	(class dynamic_call_info_t): Likewise.
	(class rewind_info_t): Likewise.
	(exploded_graph::add_edge): Likewise.
	* program-state.cc (program_state::on_edge): Update for new
	path_ctxt param.
	(program_state::push_call): Likewise.
	(program_state::returning_call): Likewise.
	(program_state::prune_for_point): Likewise.
	* region-model-impl-calls.cc: Include "analyzer/call-info.h".
	(call_details::get_fndecl_for_call): New.
	(region_model::impl_call_realloc): Reimplement.
	* region-model.cc (region_model::on_call_pre): Move call to
	impl_call_realloc to...
	(region_model::on_call_post): ...here.  Consolidate creation
	of call_details instance.
	(noop_region_model_context::bifurcate): New.
	(noop_region_model_context::terminate_path): New.
	* region-model.h (call_details::get_call_stmt): New.
	(call_details::get_fndecl_for_call): New.
	(region_model::on_realloc_with_move): New.
	(region_model_context::bifurcate): New.
	(region_model_context::terminate_path): New.
	(region_model_context::get_ext_state): New.
	(region_model_context::get_malloc_map): New.
	(noop_region_model_context::bifurcate): New.
	(noop_region_model_context::terminate_path): New.
	(noop_region_model_context::get_ext_state): New.
	(noop_region_model_context::get_malloc_map): New.
	* sm-malloc.cc: Include "analyzer/program-state.h".
	(malloc_state_machine::on_realloc_call): Reimplement.
	(malloc_state_machine::on_realloc_with_move): New.
	(region_model::on_realloc_with_move): New.
	* sm-signal.cc (class signal_delivery_edge_info_t): Update for
	conversion from exploded_edge::custom_info_t to custom_edge_info.
	* sm.h (sm_context::get_path_context): New.
	* svalue.cc (svalue::maybe_get_constant): Call
	unwrap_any_unmergeable.

2021-08-25  Ankur Saini  <arsenic@sourceware.org>

	PR analyzer/101980
	* engine.cc (exploded_graph::maybe_create_dynamic_call): Don't create
	calls if max recursion limit is reached.

2021-08-23  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (struct rejected_constraint): Convert to...
	(class rejected_constraint): ...this.
	(class bounded_ranges): New forward decl.
	(class bounded_ranges_manager): New forward decl.
	* constraint-manager.cc: Include "analyzer/analyzer-logging.h" and
	"tree-pretty-print.h".
	(can_plus_one_p): New.
	(plus_one): New.
	(can_minus_one_p): New.
	(minus_one): New.
	(bounded_range::bounded_range): New.
	(dump_cst): New.
	(bounded_range::dump_to_pp): New.
	(bounded_range::dump): New.
	(bounded_range::to_json): New.
	(bounded_range::set_json_attr): New.
	(bounded_range::contains_p): New.
	(bounded_range::intersects_p): New.
	(bounded_range::operator==): New.
	(bounded_range::cmp): New.
	(bounded_ranges::bounded_ranges): New.
	(bounded_ranges::bounded_ranges): New.
	(bounded_ranges::bounded_ranges): New.
	(bounded_ranges::canonicalize): New.
	(bounded_ranges::validate): New.
	(bounded_ranges::operator==): New.
	(bounded_ranges::dump_to_pp): New.
	(bounded_ranges::dump): New.
	(bounded_ranges::to_json): New.
	(bounded_ranges::eval_condition): New.
	(bounded_ranges::contain_p): New.
	(bounded_ranges::cmp): New.
	(bounded_ranges_manager::~bounded_ranges_manager): New.
	(bounded_ranges_manager::get_or_create_empty): New.
	(bounded_ranges_manager::get_or_create_point): New.
	(bounded_ranges_manager::get_or_create_range): New.
	(bounded_ranges_manager::get_or_create_union): New.
	(bounded_ranges_manager::get_or_create_intersection): New.
	(bounded_ranges_manager::get_or_create_inverse): New.
	(bounded_ranges_manager::consolidate): New.
	(bounded_ranges_manager::get_or_create_ranges_for_switch): New.
	(bounded_ranges_manager::create_ranges_for_switch): New.
	(bounded_ranges_manager::make_case_label_ranges): New.
	(bounded_ranges_manager::log_stats): New.
	(bounded_ranges_constraint::print): New.
	(bounded_ranges_constraint::to_json): New.
	(bounded_ranges_constraint::operator==): New.
	(bounded_ranges_constraint::add_to_hash): New.
	(constraint_manager::constraint_manager): Update for new field
	m_bounded_ranges_constraints.
	(constraint_manager::operator=): Likewise.
	(constraint_manager::hash): Likewise.
	(constraint_manager::operator==): Likewise.
	(constraint_manager::print): Likewise.
	(constraint_manager::dump_to_pp): Likewise.
	(constraint_manager::to_json): Likewise.
	(constraint_manager::add_unknown_constraint): Update the lhs_ec_id
	if necessary in existing constraints when combining equivalence
	classes.  Add similar code for handling
	m_bounded_ranges_constraints.
	(constraint_manager::add_constraint_internal): Add comment.
	(constraint_manager::add_bounded_ranges): New.
	(constraint_manager::eval_condition): Use new field
	m_bounded_ranges_constraints.
	(constraint_manager::purge): Update bounded_ranges_constraint
	instances.
	(constraint_manager::canonicalize): Update for new field.
	(merger_fact_visitor::on_ranges): New.
	(constraint_manager::for_each_fact): Use new field
	m_bounded_ranges_constraints.
	(constraint_manager::validate):  Fix off-by-one error needed due
	to bug fixed above in add_unknown_constraint.  Validate the EC IDs
	in m_bounded_ranges_constraints.
	(constraint_manager::get_range_manager): New.
	(selftest::assert_dump_bounded_range_eq): New.
	(ASSERT_DUMP_BOUNDED_RANGE_EQ): New.
	(selftest::test_bounded_range): New.
	(selftest::assert_dump_bounded_ranges_eq): New.
	(ASSERT_DUMP_BOUNDED_RANGES_EQ): New.
	(selftest::test_bounded_ranges): New.
	(selftest::run_constraint_manager_tests): Call the new selftests.
	* constraint-manager.h (struct bounded_range): New.
	(struct bounded_ranges): New.
	(template <> struct default_hash_traits<bounded_ranges::key_t>): New.
	(class bounded_ranges_manager): New.
	(fact_visitor::on_ranges): New pure virtual function.
	(class bounded_ranges_constraint): New.
	(constraint_manager::add_bounded_ranges): New decl.
	(constraint_manager::get_range_manager): New decl.
	(constraint_manager::m_bounded_ranges_constraints): New field.
	* diagnostic-manager.cc (epath_finder::process_worklist_item):
	Transfer ownership of rc to add_feasibility_problem.
	* engine.cc (feasibility_problem::dump_to_pp): Use get_model.
	* feasible-graph.cc (infeasible_node::dump_dot): Update for
	conversion of m_rc to a pointer.
	(feasible_graph::add_feasibility_problem): Pass RC by pointer and
	take ownership.
	* feasible-graph.h (infeasible_node::infeasible_node): Pass RC by
	pointer and take ownership.
	(infeasible_node::~infeasible_node): New.
	(infeasible_node::m_rc): Convert to a pointer.
	(feasible_graph::add_feasibility_problem): Pass RC by pointer and
	take ownership.
	* region-model-manager.cc: Include
	"analyzer/constraint-manager.h".
	(region_model_manager::region_model_manager): Initializer new
	field m_range_mgr.
	(region_model_manager::~region_model_manager): Delete it.
	(region_model_manager::log_stats): Call log_stats on it.
	* region-model.cc (region_model::add_constraint): Use new subclass
	rejected_op_constraint.
	(region_model::apply_constraints_for_gswitch): Reimplement using
	bounded_ranges_manager.
	(rejected_constraint::dump_to_pp): Convert to...
	(rejected_op_constraint::dump_to_pp): ...this.
	(rejected_ranges_constraint::dump_to_pp): New.
	* region-model.h (struct purge_stats): Add field
	m_num_bounded_ranges_constraints.
	(region_model_manager::get_range_manager): New.
	(region_model_manager::m_range_mgr): New.
	(region_model::get_range_manager): New.
	(struct rejected_constraint): Split into...
	(class rejected_constraint):...this new abstract base class,
	and...
	(class rejected_op_constraint): ...this new concrete subclass.
	(class rejected_ranges_constraint): New.
	* supergraph.cc: Include "tree-cfg.h".
	(supergraph::supergraph): Drop idx param from add_cfg_edge.
	(supergraph::add_cfg_edge): Drop idx param.
	(switch_cfg_superedge::switch_cfg_superedge): Move here from
	header.  Populate m_case_labels with all cases which go to DST.
	(switch_cfg_superedge::dump_label_to_pp): Reimplement to use
	m_case_labels.
	(switch_cfg_superedge::get_case_label): Delete.
	* supergraph.h (supergraphadd_cfg_edge): Drop "idx" param.
	(switch_cfg_superedge::switch_cfg_superedge): Drop idx param and
	move implementation to supergraph.cc.
	(switch_cfg_superedge::get_case_label): Delete.
	(switch_cfg_superedge::get_case_labels): New.
	(switch_cfg_superedge::m_idx): Delete.
	(switch_cfg_superedge::m_case_labels): New field.

2021-08-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101875
	* sm-file.cc (file_diagnostic::describe_state_change): Handle
	change.m_expr being NULL.

2021-08-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101837
	* analyzer.cc (maybe_reconstruct_from_def_stmt): Bail if fn is
	NULL, and assert that it's non-NULL before passing it to
	build_call_array_loc.

2021-08-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101962
	* region-model.cc (region_model::eval_condition_without_cm):
	Refactor comparison against zero, adding a check for
	POINTER_PLUS_EXPR of non-NULL.

2021-08-23  David Malcolm  <dmalcolm@redhat.com>

	* store.cc (bit_range::intersects_p): New overload.
	(bit_range::operator-): New.
	(binding_cluster::maybe_get_compound_binding): Handle the partial
	overlap case.
	(selftest::test_bit_range_intersects_p): Add test coverage for
	new overload of bit_range::intersects_p.
	* store.h (bit_range::intersects_p): New overload.
	(bit_range::operator-): New.

2021-08-23  Ankur Saini  <arsenic@sourceware.org>

	PR analyzer/102020
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic)<case EK_CALL_EDGE>: Fix typo.

2021-08-21  Ankur Saini  <arsenic@sourceware.org>

	PR analyzer/101980
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic)<case EK_CALL_EDGE>: Use
	caller_model only when the supergraph_edge doesn't exixt.
	(diagnostic_manager::prune_for_sm_diagnostic)<case EK_RETURN_EDGE>:
	Likewise.
	* engine.cc (exploded_graph::create_dynamic_call): Rename to...
	(exploded_graph::maybe_create_dynamic_call): ...this, return call
	creation status.
	(exploded_graph::process_node): Handle calls which were not dynamically
	discovered.
	* exploded-graph.h (exploded_graph::create_dynamic_call): Rename to...
	(exploded_graph::maybe_create_dynamic_call): ...this.
	* region-model.cc (region_model::update_for_gcall): New param, use it
	to push call to frame.
	(region_model::update_for_call_superedge): Pass callee function to
	update_for_gcall.
	* region-model.h (region_model::update_for_gcall): New param.

2021-08-18  Ankur Saini  <arsenic@sourceware.org>

	PR analyzer/97114
	* region-model.cc (region_model::get_rvalue_1): Add case for
	OBJ_TYPE_REF.

2021-08-18  Ankur Saini  <arsenic@sourceware.org>

	PR analyzer/100546
	* analysis-plan.cc (analysis_plan::use_summary_p): Don't use call
	summaries if there is no callgraph edge
	* checker-path.cc (call_event::call_event): Handle calls events that
	are not represented by a supergraph call edge
	(return_event::return_event): Likewise.
	(call_event::get_desc): Work with new call_event structure.
	(return_event::get_desc): Likeise.
	* checker-path.h (call_event::m_src_snode): New field.
	(call_event::m_dest_snode): New field.
	(return_event::m_src_snode): New field.
	(return_event::m_dest_snode): New field.
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic)<case EK_CALL_EDGE>:
	Refactor to work with edges without callgraph edge.
	(diagnostic_manager::prune_for_sm_diagnostic)<case EK_RETURN_EDGE>:
	Likewise.
	* engine.cc (dynamic_call_info_t::update_model): New function.
	(dynamic_call_info_t::add_events_to_path): New function.
	(exploded_graph::create_dynamic_call): New function.
	(exploded_graph::process_node): Work with dynamically discovered calls.
	* exploded-graph.h (class dynamic_call_info_t): New class.
	(exploded_graph::create_dynamic_call): New decl.
	* program-point.cc (program_point::push_to_call_stack): New function.
	(program_point::pop_from_call_stack): New function.
	* program-point.h (program_point::push_to_call_stack): New decl.
	(program_point::pop_from_call_stack): New decl.
	* program-state.cc (program_state::push_call): New function.
	(program_state::returning_call): New function.
	* program-state.h (program_state::push_call): New decl.
	(program_state::returning_call): New decl.
	* region-model.cc (region_model::update_for_gcall) New function.
	(region_model::update_for_return_gcall): New function.
	(egion_model::update_for_call_superedge): Get the underlying gcall and
	update for gcall.
	(region_model::update_for_return_superedge): Likewise.
	* region-model.h (region_model::update_for_gcall): New decl.
	(region_model::update_for_return_gcall): New decl.
	* state-purge.cc (state_purge_per_ssa_name::process_point): Update to
	work with calls without underlying cgraph edge.
	* supergraph.cc (supergraph::supergraph) Split snodes at every callsite.
	* supergraph.h (supernode::get_returning_call) New accessor.

2021-08-04  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101570
	* analyzer.cc (maybe_reconstruct_from_def_stmt): Add GIMPLE_ASM
	case.
	* analyzer.h (class asm_output_svalue): New forward decl.
	(class reachable_regions): New forward decl.
	* complexity.cc (complexity::from_vec_svalue): New.
	* complexity.h (complexity::from_vec_svalue): New decl.
	* engine.cc (feasibility_state::maybe_update_for_edge): Handle
	asm stmts by calling on_asm_stmt.
	* region-model-asm.cc: New file.
	* region-model-manager.cc
	(region_model_manager::maybe_fold_asm_output_svalue): New.
	(region_model_manager::get_or_create_asm_output_svalue): New.
	(region_model_manager::log_stats): Log m_asm_output_values_map.
	* region-model.cc (region_model::on_stmt_pre): Handle GIMPLE_ASM.
	* region-model.h (visitor::visit_asm_output_svalue): New.
	(region_model_manager::get_or_create_asm_output_svalue): New decl.
	(region_model_manager::maybe_fold_asm_output_svalue): New decl.
	(region_model_manager::asm_output_values_map_t): New typedef.
	(region_model_manager::m_asm_output_values_map): New field.
	(region_model::on_asm_stmt): New.
	* store.cc (binding_cluster::on_asm): New.
	* store.h (binding_cluster::on_asm): New decl.
	* svalue.cc (svalue::cmp_ptr): Handle SK_ASM_OUTPUT.
	(asm_output_svalue::dump_to_pp): New.
	(asm_output_svalue::dump_input): New.
	(asm_output_svalue::input_idx_to_asm_idx): New.
	(asm_output_svalue::accept): New.
	* svalue.h (enum svalue_kind): Add SK_ASM_OUTPUT.
	(svalue::dyn_cast_asm_output_svalue): New.
	(class asm_output_svalue): New.
	(is_a_helper <const asm_output_svalue *>::test): New.
	(struct default_hash_traits<asm_output_svalue::key_t>): New.

2021-08-03  Jakub Jelinek  <jakub@redhat.com>

	PR analyzer/101721
	* sm-malloc.cc (known_allocator_p): Only check DECL_FUNCTION_CODE on
	BUILT_IN_NORMAL builtins.

2021-07-29  Ankur Saini  <arsenic@sourceware.org>

	* call-string.cc (call_string::element_t::operator==): New operator.
	(call_String::element_t::operator!=): New operator.
	(call_string::element_t::get_caller_function): New function.
	(call_string::element_t::get_callee_function): New function.
	(call_string::call_string): Refactor to Initialise m_elements.
	(call_string::operator=): Refactor to work with m_elements.
	(call_string::operator==): Likewise.
	(call_string::to_json): Likewise.
	(call_string::hash): Refactor to hash e.m_caller.
	(call_string::push_call): Refactor to work with m_elements.
	(call_string::push_call): New overload to push call via supernodes.
	(call_string::pop): Refactor to work with m_elements.
	(call_string::calc_recursion_depth): Likewise.
	(call_string::cmp): Likewise.
	(call_string::validate): Likewise.
	(call_string::operator[]): Likewise.
	* call-string.h (class supernode): New forward decl.
	(struct call_string::element_t): New struct.
	(call_string::call_string): Refactor to initialise m_elements.
	(call_string::bool empty_p): Refactor to work with m_elements.
	(call_string::get_callee_node): New decl.
	(call_string::get_caller_node): New decl.
	(m_elements): Replaces m_return_edges.
	* program-point.cc (program_point::get_function_at_depth): Refactor to
	work with new call-string format.
	(program_point::validate): Likewise.
	(program_point::on_edge): Likewise.

2021-07-28  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::on_call_pre): Treat
	IFN_UBSAN_BOUNDS, BUILT_IN_STACK_SAVE, and BUILT_IN_STACK_RESTORE
	as no-ops, rather than handling them as unknown functions.

2021-07-28  David Malcolm  <dmalcolm@redhat.com>

	* region-model-impl-calls.cc (region_model::impl_call_alloca):
	Drop redundant return value.
	(region_model::impl_call_builtin_expect): Likewise.
	(region_model::impl_call_calloc): Likewise.
	(region_model::impl_call_malloc): Likewise.
	(region_model::impl_call_memset): Likewise.
	(region_model::impl_call_operator_new): Likewise.
	(region_model::impl_call_operator_delete): Likewise.
	(region_model::impl_call_strlen): Likewise.
	* region-model.cc (region_model::on_call_pre): Fix return value of
	known functions that don't have unknown side-effects.
	* region-model.h (region_model::impl_call_alloca): Drop redundant
	return value.
	(region_model::impl_call_builtin_expect): Likewise.
	(region_model::impl_call_calloc): Likewise.
	(region_model::impl_call_malloc): Likewise.
	(region_model::impl_call_memset): Likewise.
	(region_model::impl_call_strlen): Likewise.
	(region_model::impl_call_operator_new): Likewise.
	(region_model::impl_call_operator_delete): Likewise.

2021-07-28  Siddhesh Poyarekar  <siddhesh@gotplt.org>

	* analyzer.cc (is_named_call_p, is_std_named_call_p): Make
	first argument a const_tree.
	* analyzer.h (is_named_call_p, -s_std_named_call_p): Likewise.
	* sm-malloc.cc (known_allocator_p): New function.
	(malloc_state_machine::on_stmt): Use it.

2021-07-28  Siddhesh Poyarekar  <siddhesh@gotplt.org>

	* sm-malloc.cc
	(malloc_state_machine::get_or_create_deallocator): Recognize
	__builtin_free.

2021-07-26  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::on_call_pre): Always set conjured
	LHS, not just for SSA names.

2021-07-23  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc
	(class auto_disable_complexity_checks): New.
	(epath_finder::explore_feasible_paths): Use it to disable
	complexity checks whilst processing the worklist.
	* region-model-manager.cc
	(region_model_manager::region_model_manager): Initialize
	m_check_complexity.
	(region_model_manager::reject_if_too_complex): Bail if
	m_check_complexity is false.
	* region-model.h
	(region_model_manager::enable_complexity_check): New.
	(region_model_manager::disable_complexity_check): New.
	(region_model_manager::m_check_complexity): New.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101547
	* sm-file.cc (file_leak::emit): Handle m_arg being NULL.
	(file_leak::describe_final_event): Handle ev.m_expr being NULL.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101522
	* store.cc (binding_cluster::purge_state_involving): Don't change
	m_map whilst iterating through it.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::handle_phi): Add "old_state"
	param and use it.
	(region_model::update_for_phis): Update so that all of the phi
	stmts are effectively handled simultaneously, rather than in
	order.
	* region-model.h (region_model::handle_phi): Add "old_state"
	param.
	* state-purge.cc (self_referential_phi_p): Replace with...
	(name_used_by_phis_p): ...this new function.
	(state_purge_per_ssa_name::process_point): Update to use the
	above, so that all phi stmts at a basic block are effectively
	considered simultaneously, and only consider the phi arguments for
	the pertinent in-edge.
	* supergraph.cc (cfg_superedge::get_phi_arg_idx): New.
	(cfg_superedge::get_phi_arg): Use the above.
	* supergraph.h (cfg_superedge::get_phi_arg_idx): New decl.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	* state-purge.cc (state_purge_annotator::add_node_annotations):
	Rather than erroneously always using the NULL in-edge, determine
	each relevant in-edge, and print the appropriate data for each
	in-edge.  Use print_needed to print the data as comma-separated
	lists of SSA names.
	(print_vec_of_names): Add "within_table" param and use it.
	(state_purge_annotator::add_stmt_annotations): Factor out
	collation and printing code into...
	(state_purge_annotator::print_needed): ...this new function.
	* state-purge.h (state_purge_annotator::print_needed): New decl.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	* program-point.cc (function_point::print): Show src BB index at
	BEFORE_SUPERNODE.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	* svalue.cc (infix_p): New.
	(binop_svalue::dump_to_pp): Use it to print MIN_EXPR and MAX_EXPR
	in prefix form, rather than infix.

2021-07-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101503
	* constraint-manager.cc (constraint_manager::add_constraint): Use
	can_have_associated_state_p rather than testing for unknown.
	(constraint_manager::get_or_add_equiv_class): Likewise.
	* program-state.cc (sm_state_map::set_state): Likewise.
	(sm_state_map::impl_set_state): Add assertion.
	* region-model-manager.cc
	(region_model_manager::maybe_fold_unaryop): Handle poisoned
	values.
	(region_model_manager::maybe_fold_binop): Move handling of unknown
	values...
	(region_model_manager::get_or_create_binop): ...to here, and
	generalize to use can_have_associated_state_p.
	(region_model_manager::maybe_fold_sub_svalue): Use
	can_have_associated_state_p rather than testing for unknown.
	(region_model_manager::maybe_fold_repeated_svalue): Use unknown
	when the size or repeated value is "unknown"/"poisoned".
	* region-model.cc (region_model::purge_state_involving): Reject
	attempts to purge unknown/poisoned svalues, as these svalues
	should not have state associated with them.
	* svalue.cc (sub_svalue::sub_svalue): Assert that we're building
	on top of an svalue with can_have_associated_state_p.
	(repeated_svalue::repeated_svalue): Likewise.
	(bits_within_svalue::bits_within_svalue): Likewise.
	* svalue.h (svalue::can_have_associated_state_p): New.
	(unknown_svalue::can_have_associated_state_p): New.
	(poisoned_svalue::can_have_associated_state_p): New.
	(unaryop_svalue::unaryop_svalue): Assert that we're building on
	top of an svalue with can_have_associated_state_p.
	(binop_svalue::binop_svalue): Likewise.
	(widening_svalue::widening_svalue): Likewise.

2021-07-16  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (enum access_direction): New.
	* engine.cc (exploded_node::on_longjmp): Update for new param of
	get_store_value.
	* program-state.cc (program_state::prune_for_point): Likewise.
	* region-model-impl-calls.cc (region_model::impl_call_memcpy):
	Replace call to check_for_writable_region with call to
	check_region_for_write.
	(region_model::impl_call_memset): Likewise.
	(region_model::impl_call_strcpy): Likewise.
	* region-model-reachability.cc (reachable_regions::add): Update
	for new param of get_store_value.
	* region-model.cc (region_model::get_rvalue_1): Likewise, also for
	get_rvalue_for_bits.
	(region_model::get_store_value): Add ctxt param and use it to call
	check_region_for_read.
	(region_model::get_rvalue_for_bits): Add ctxt param and use it to
	call get_store_value.
	(region_model::check_region_access): New.
	(region_model::check_region_for_write): New.
	(region_model::check_region_for_read): New.
	(region_model::set_value): Update comment.  Replace call to
	check_for_writable_region with call to check_region_for_write.
	* region-model.h (region_model::get_rvalue_for_bits): Add ctxt
	param.
	(region_model::get_store_value): Add ctxt param.
	(region_model::check_region_access): New decl.
	(region_model::check_region_for_write): New decl.
	(region_model::check_region_for_read): New decl.
	* region.cc (region_model::copy_region): Update call to
	get_store_value.
	* svalue.cc (initial_svalue::implicitly_live_p): Likewise.

2021-07-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::on_stmt_pre): Handle
	__analyzer_dump_state.
	* program-state.cc (extrinsic_state::get_sm_idx_by_name): New.
	(program_state::impl_call_analyzer_dump_state): New.
	* program-state.h (extrinsic_state::get_sm_idx_by_name): New decl.
	(program_state::impl_call_analyzer_dump_state): New decl.
	* region-model-impl-calls.cc
	(call_details::get_arg_string_literal): New.
	* region-model.h (call_details::get_arg_string_literal): New decl.

2021-07-16  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (program_state::detect_leaks): Simplify using
	svalue::maybe_get_region.
	* region-model-impl-calls.cc (region_model::impl_call_fgets): Likewise.
	(region_model::impl_call_fread): Likewise.
	(region_model::impl_call_free): Likewise.
	(region_model::impl_call_operator_delete): Likewise.
	* region-model.cc (selftest::test_stack_frames): Likewise.
	(selftest::test_state_merging): Likewise.
	* svalue.cc (svalue::maybe_get_region): New.
	* svalue.h (svalue::maybe_get_region): New decl.

2021-07-15  David Malcolm  <dmalcolm@redhat.com>

	* svalue.h (is_a_helper <placeholder_svalue *>::test): Make
	param and template param const.
	(is_a_helper <widening_svalue *>::test): Likewise.
	(is_a_helper <compound_svalue *>::test): Likewise.
	(is_a_helper <conjured_svalue *>::test): Likewise.

2021-07-15  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/95006
	PR analyzer/94713
	PR analyzer/94714
	* analyzer.cc (maybe_reconstruct_from_def_stmt): Split out
	GIMPLE_ASSIGN case into...
	(get_diagnostic_tree_for_gassign_1): New.
	(get_diagnostic_tree_for_gassign): New.
	* analyzer.h (get_diagnostic_tree_for_gassign): New decl.
	* analyzer.opt (Wanalyzer-write-to-string-literal): New.
	* constraint-manager.cc (class svalue_purger): New.
	(constraint_manager::purge_state_involving): New.
	* constraint-manager.h
	(constraint_manager::purge_state_involving): New.
	* diagnostic-manager.cc (saved_diagnostic::supercedes_p): New.
	(dedupe_winners::handle_interactions): New.
	(diagnostic_manager::emit_saved_diagnostics): Call it.
	* diagnostic-manager.h (saved_diagnostic::supercedes_p): New decl.
	* engine.cc (impl_region_model_context::warn): Convert return type
	to bool.  Return false if the diagnostic isn't saved.
	(impl_region_model_context::purge_state_involving): New.
	(impl_sm_context::get_state): Use NULL ctxt when querying old
	rvalue.
	(impl_sm_context::set_next_state): Use new sval when querying old
	state.
	(class dump_path_diagnostic): Move to region-model.cc
	(exploded_node::on_stmt): Move to on_stmt_pre and on_stmt_post.
	Remove call to purge_state_involving.
	(exploded_node::on_stmt_pre): New, based on the above.  Move most
	of it to region_model::on_stmt_pre.
	(exploded_node::on_stmt_post): Likewise, moving to
	region_model::on_stmt_post.
	(class stale_jmp_buf): Fix parent class to use curiously recurring
	template pattern.
	(feasibility_state::maybe_update_for_edge): Call on_call_pre and
	on_call_post on gcalls.
	* exploded-graph.h (impl_region_model_context::warn): Return bool.
	(impl_region_model_context::purge_state_involving): New decl.
	(exploded_node::on_stmt_pre): New decl.
	(exploded_node::on_stmt_post): New decl.
	* pending-diagnostic.h (pending_diagnostic::use_of_uninit_p): New.
	(pending_diagnostic::supercedes_p): New.
	* program-state.cc (sm_state_map::get_state): Inherit state for
	conjured_svalue as well as initial_svalue.
	(sm_state_map::purge_state_involving): Also support SK_CONJURED.
	* region-model-impl-calls.cc (call_details::get_uncertainty):
	Handle m_ctxt being NULL.
	(call_details::get_or_create_conjured_svalue): New.
	(region_model::impl_call_fgets): New.
	(region_model::impl_call_fread): New.
	* region-model-manager.cc
	(region_model_manager::get_or_create_initial_value): Return an
	uninitialized poisoned value for regions that can't have initial
	values.
	* region-model-reachability.cc
	(reachable_regions::mark_escaped_clusters): Handle ctxt being
	NULL.
	* region-model.cc (region_to_value_map::purge_state_involving): New.
	(poisoned_value_diagnostic::use_of_uninit_p): New.
	(poisoned_value_diagnostic::emit): Handle POISON_KIND_UNINIT.
	(poisoned_value_diagnostic::describe_final_event): Likewise.
	(region_model::check_for_poison): New.
	(region_model::on_assignment): Call it.
	(class dump_path_diagnostic): Move here from engine.cc.
	(region_model::on_stmt_pre): New, based on exploded_node::on_stmt.
	(region_model::on_call_pre): Move the setting of the LHS to a
	conjured svalue to before the checks for specific functions.
	Handle "fgets", "fgets_unlocked", and "fread".
	(region_model::purge_state_involving): New.
	(region_model::handle_unrecognized_call): Handle ctxt being NULL.
	(region_model::get_rvalue): Call check_for_poison.
	(selftest::test_stack_frames): Use NULL for context when getting
	uninitialized rvalue.
	(selftest::test_alloca): Likewise.
	* region-model.h (region_to_value_map::purge_state_involving): New
	decl.
	(call_details::get_or_create_conjured_svalue): New decl.
	(region_model::on_stmt_pre): New decl.
	(region_model::purge_state_involving): New decl.
	(region_model::impl_call_fgets): New decl.
	(region_model::impl_call_fread): New decl.
	(region_model::check_for_poison): New decl.
	(region_model_context::warn): Return bool.
	(region_model_context::purge_state_involving): New.
	(noop_region_model_context::warn): Return bool.
	(noop_region_model_context::purge_state_involving): New.
	(test_region_model_context:: warn): Return bool.
	* region.cc (region::get_memory_space): New.
	(region::can_have_initial_svalue_p): New.
	(region::involves_p): New.
	* region.h (enum memory_space): New.
	(region::get_memory_space): New decl.
	(region::can_have_initial_svalue_p): New decl.
	(region::involves_p): New decl.
	* sm-malloc.cc (use_after_free::supercedes_p): New.
	* store.cc (binding_cluster::purge_state_involving): New.
	(store::purge_state_involving): New.
	* store.h (class symbolic_binding): New forward decl.
	(binding_key::dyn_cast_symbolic_binding): New.
	(symbolic_binding::dyn_cast_symbolic_binding): New.
	(binding_cluster::purge_state_involving): New.
	(store::purge_state_involving): New.
	* svalue.cc (svalue::can_merge_p): Reject attempts to merge
	poisoned svalues with other svalues, so that we identify
	paths in which a variable is conditionally uninitialized.
	(involvement_visitor::visit_conjured_svalue): New.
	(svalue::involves_p): Also handle SK_CONJURED.
	(poison_kind_to_str): Handle POISON_KIND_UNINIT.
	(poisoned_svalue::maybe_fold_bits_within): New.
	* svalue.h (enum poison_kind): Add POISON_KIND_UNINIT.
	(poisoned_svalue::maybe_fold_bits_within): New decl.

2021-07-15  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.opt (fdump-analyzer-exploded-paths): New.
	* diagnostic-manager.cc
	(diagnostic_manager::emit_saved_diagnostic): Implement it.
	* engine.cc (exploded_path::dump_to_pp): Add ext_state param and
	use it to dump states if non-NULL.
	(exploded_path::dump): Likewise.
	(exploded_path::dump_to_file): New.
	* exploded-graph.h (exploded_path::dump_to_pp): Add ext_state
	param.
	(exploded_path::dump): Likewise.
	(exploded_path::dump): Likewise.
	(exploded_path::dump_to_file): New.

2021-07-15  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.cc (fixup_tree_for_diagnostic_1): Use DECL_DEBUG_EXPR
	if it's available.
	* engine.cc (readability): Likewise.

2021-07-15  David Malcolm  <dmalcolm@redhat.com>

	* state-purge.cc (self_referential_phi_p): New.
	(state_purge_per_ssa_name::process_point): Don't purge an SSA name
	at its def-stmt if the def-stmt is self-referential.

2021-07-07  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (null_assignment_sm_context::get_state):
	New overload.
	(null_assignment_sm_context::set_next_state): New overload.
	(null_assignment_sm_context::get_diagnostic_tree): New.
	* engine.cc (impl_sm_context::get_state): New overload.
	(impl_sm_context::set_next_state): New overload.
	(impl_sm_context::get_diagnostic_tree): New overload.
	(impl_region_model_context::on_condition): Convert params from
	tree to const svalue *.
	* exploded-graph.h (impl_region_model_context::on_condition):
	Likewise.
	* region-model.cc (region_model::on_call_pre): Move handling of
	internal calls to before checking for get_fndecl_for_call.
	(region_model::add_constraints_from_binop): New.
	(region_model::add_constraint): Split out into a new overload
	working on const svalue * rather than tree.  Call
	add_constraints_from_binop.  Drop call to
	add_any_constraints_from_ssa_def_stmt.
	(region_model::add_any_constraints_from_ssa_def_stmt): Delete.
	(region_model::add_any_constraints_from_gassign): Delete.
	(region_model::add_any_constraints_from_gcall): Delete.
	* region-model.h
	(region_model::add_any_constraints_from_ssa_def_stmt): Delete.
	(region_model::add_any_constraints_from_gassign): Delete.
	(region_model::add_any_constraints_from_gcall): Delete.
	(region_model::add_constraint): Add overload decl.
	(region_model::add_constraints_from_binop): New decl.
	(region_model_context::on_condition): Convert params from tree to
	const svalue *.
	(noop_region_model_context::on_condition): Likewise.
	* sm-file.cc (fileptr_state_machine::condition): Likewise.
	* sm-malloc.cc (malloc_state_machine::on_condition): Likewise.
	* sm-pattern-test.cc: Include tristate.h, selftest.h,
	analyzer/call-string.h, analyzer/program-point.h,
	analyzer/store.h, and analyzer/region-model.h.
	(pattern_test_state_machine::on_condition): Convert params from tree to
	const svalue *.
	* sm-sensitive.cc (sensitive_state_machine::on_condition): Delete.
	* sm-signal.cc (signal_state_machine::on_condition): Delete.
	* sm-taint.cc (taint_state_machine::on_condition): Convert params
	from tree to const svalue *.
	* sm.cc: Include tristate.h, selftest.h, analyzer/call-string.h,
	analyzer/program-point.h, analyzer/store.h, and
	analyzer/region-model.h.
	(any_pointer_p): Add overload taking const svalue *sval.
	* sm.h (any_pointer_p): Add overload taking const svalue *sval.
	(state_machine::on_condition): Convert params from tree to
	const svalue *.  Provide no-op default implementation.
	(sm_context::get_state): Add overload taking const svalue *sval.
	(sm_context::set_next_state): Likewise.
	(sm_context::on_transition): Likewise.
	(sm_context::get_diagnostic_tree): Likewise.
	* svalue.cc (svalue::all_zeroes_p): New.
	(constant_svalue::all_zeroes_p): New.
	(repeated_svalue::all_zeroes_p): Convert to vfunc.
	* svalue.h (svalue::all_zeroes_p): New decl.
	(constant_svalue::all_zeroes_p): New decl.
	(repeated_svalue::all_zeroes_p): Convert decl to vfunc.

2021-06-30  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/95006
	* analyzer.h (class repeated_svalue): New forward decl.
	(class bits_within_svalue): New forward decl.
	(class sized_region): New forward decl.
	(get_field_at_bit_offset): New forward decl.
	* engine.cc (exploded_graph::get_or_create_node): Validate the
	merged state.
	(exploded_graph::maybe_process_run_of_before_supernode_enodes):
	Validate the states at each stage.
	* program-state.cc (program_state::validate): Validate
	m_region_model.
	* region-model-impl-calls.cc (region_model::impl_call_memset):
	Replace special-case logic for handling constant sizes with
	a call to fill_region of a sized_region with the given fill value.
	* region-model-manager.cc (maybe_undo_optimize_bit_field_compare):
	Drop DK_direct.
	(region_model_manager::maybe_fold_sub_svalue):  Fold element-based
	subregions of an initial value into initial values of an element.
	Fold subvalues of repeated svalues.
	(region_model_manager::maybe_fold_repeated_svalue): New.
	(region_model_manager::get_or_create_repeated_svalue): New.
	(get_bit_range_for_field): New.
	(get_byte_range_for_field): New.
	(get_field_at_byte_range): New.
	(region_model_manager::maybe_fold_bits_within_svalue): New.
	(region_model_manager::get_or_create_bits_within): New.
	(region_model_manager::get_sized_region): New.
	(region_model_manager::log_stats): Update for addition of
	m_repeated_values_map, m_bits_within_values_map, and
	m_sized_regions.
	* region-model.cc (region_model::validate): New.
	(region_model::on_assignment): Drop enum binding_kind.
	(region_model::get_initial_value_for_global): Likewise.
	(region_model::get_rvalue_for_bits): Replace body with call to
	get_or_create_bits_within.
	(region_model::get_capacity): Handle RK_SIZED.
	(region_model::set_value): Drop enum binding_kind.
	(region_model::fill_region): New.
	(region_model::get_representative_path_var_1): Handle RK_SIZED.
	* region-model.h (visitor::visit_repeated_svalue): New.
	(visitor::visit_bits_within_svalue): New.
	(region_model_manager::get_or_create_repeated_svalue): New decl.
	(region_model_manager::get_or_create_bits_within): New decl.
	(region_model_manager::get_sized_region): New decl.
	(region_model_manager::maybe_fold_repeated_svalue): New decl.
	(region_model_manager::maybe_fold_bits_within_svalue): New decl.
	(region_model_manager::repeated_values_map_t): New typedef.
	(region_model_manager::m_repeated_values_map): New field.
	(region_model_manager::bits_within_values_map_t): New typedef.
	(region_model_manager::m_bits_within_values_map): New field.
	(region_model_manager::m_sized_regions): New field.
	(region_model::fill_region): New decl.
	* region.cc (region::get_base_region): Handle RK_SIZED.
	(region::base_region_p): Likewise.
	(region::get_byte_size_sval): New.
	(get_field_at_bit_offset): Make non-static.
	(region::calc_offset): Move implementation of cases to
	get_relative_concrete_offset vfunc implementations.  Handle
	RK_SIZED.
	(region::get_relative_concrete_offset): New.
	(decl_region::get_svalue_for_initializer): Drop enum binding_kind.
	(field_region::get_relative_concrete_offset): New, from
	region::calc_offset.
	(element_region::get_relative_concrete_offset): Likewise.
	(offset_region::get_relative_concrete_offset): Likewise.
	(sized_region::accept): New.
	(sized_region::dump_to_pp): New.
	(sized_region::get_byte_size): New.
	(sized_region::get_bit_size): New.
	* region.h (enum region_kind): Add RK_SIZED.
	(region::dyn_cast_sized_region): New.
	(region::get_byte_size): Make virtual.
	(region::get_bit_size): Likewise.
	(region::get_byte_size_sval): New decl.
	(region::get_relative_concrete_offset): New decl.
	(field_region::get_relative_concrete_offset): New decl.
	(element_region::get_relative_concrete_offset): Likewise.
	(offset_region::get_relative_concrete_offset): Likewise.
	(class sized_region): New.
	* store.cc (binding_kind_to_string): Delete.
	(binding_key::make): Drop enum binding_kind.
	(binding_key::dump_to_pp): Delete.
	(binding_key::cmp_ptrs): Drop enum binding_kind.
	(bit_range::contains_p): New.
	(byte_range::dump): New.
	(byte_range::contains_p): New.
	(byte_range::cmp): New.
	(concrete_binding::dump_to_pp): Drop enum binding_kind.
	(concrete_binding::cmp_ptr_ptr): Likewise.
	(symbolic_binding::dump_to_pp): Likewise.
	(symbolic_binding::cmp_ptr_ptr): Likewise.
	(binding_map::apply_ctor_val_to_range): Likewise.
	(binding_map::apply_ctor_pair_to_child_region): Likewise.
	(binding_map::get_overlapping_bindings): New.
	(binding_map::remove_overlapping_bindings): New.
	(binding_cluster::validate): New.
	(binding_cluster::bind): Drop enum binding_kind.
	(binding_cluster::bind_compound_sval): Likewise.
	(binding_cluster::purge_region): Likewise.
	(binding_cluster::zero_fill_region): Reimplement in terms of...
	(binding_cluster::fill_region): New.
	(binding_cluster::mark_region_as_unknown): Drop enum binding_kind.
	(binding_cluster::get_binding): Likewise.
	(binding_cluster::get_binding_recursive): Likewise.
	(binding_cluster::get_any_binding): Likewise.
	(binding_cluster::maybe_get_compound_binding): Reimplement.
	(binding_cluster::get_overlapping_bindings): Delete.
	(binding_cluster::remove_overlapping_bindings): Reimplement in
	terms of binding_map::remove_overlapping_bindings.
	(binding_cluster::can_merge_p): Update for removal of
	enum binding_kind.
	(binding_cluster::on_unknown_fncall): Drop enum binding_kind.
	(binding_cluster::maybe_get_simple_value): Likewise.
	(store_manager::get_concrete_binding): Likewise.
	(store_manager::get_symbolic_binding): Likewise.
	(store::validate): New.
	(store::set_value): Drop enum binding_kind.
	(store::zero_fill_region): Reimplement in terms of...
	(store::fill_region): New.
	(selftest::test_binding_key_overlap): Drop enum binding_kind.
	* store.h (enum binding_kind): Delete.
	(binding_kind_to_string): Delete decl.
	(binding_key::make): Drop enum binding_kind.
	(binding_key::dump_to_pp): Make pure virtual.
	(binding_key::get_kind): Delete.
	(binding_key::mark_deleted): Delete.
	(binding_key::mark_empty): Delete.
	(binding_key::is_deleted): Delete.
	(binding_key::is_empty): Delete.
	(binding_key::binding_key): Delete.
	(binding_key::impl_hash): Delete.
	(binding_key::impl_eq): Delete.
	(binding_key::m_kind): Delete.
	(bit_range::get_last_bit_offset): New.
	(bit_range::contains_p): New.
	(byte_range::contains_p): New.
	(byte_range::operator==): New.
	(byte_range::get_start_byte_offset): New.
	(byte_range::get_next_byte_offset): New.
	(byte_range::get_last_byte_offset): New.
	(byte_range::as_bit_range): New.
	(byte_range::cmp): New.
	(concrete_binding::concrete_binding): Drop enum binding_kind.
	(concrete_binding::hash): Likewise.
	(concrete_binding::operator==): Likewise.
	(concrete_binding::mark_deleted): New.
	(concrete_binding::mark_empty): New.
	(concrete_binding::is_deleted): New.
	(concrete_binding::is_empty): New.
	(default_hash_traits<ana::concrete_binding>::empty_zero_p): Make false.
	(symbolic_binding::symbolic_binding): Drop enum binding_kind.
	(symbolic_binding::hash): Likewise.
	(symbolic_binding::operator==): Likewise.
	(symbolic_binding::mark_deleted): New.
	(symbolic_binding::mark_empty): New.
	(symbolic_binding::is_deleted): New.
	(symbolic_binding::is_empty): New.
	(binding_map::remove_overlapping_bindings): New decl.
	(binding_map::get_overlapping_bindings): New decl.
	(binding_cluster::validate): New decl.
	(binding_cluster::bind): Drop enum binding_kind.
	(binding_cluster::fill_region): New decl.
	(binding_cluster::get_binding): Drop enum binding_kind.
	(binding_cluster::get_binding_recursive): Likewise.
	(binding_cluster::get_overlapping_bindings): Delete.
	(store::validate): New decl.
	(store::set_value): Drop enum binding_kind.
	(store::fill_region): New decl.
	(store_manager::get_concrete_binding): Drop enum binding_kind.
	(store_manager::get_symbolic_binding): Likewise.
	* svalue.cc (svalue::cmp_ptr): Handle SK_REPEATED and
	SK_BITS_WITHIN.
	(svalue::extract_bit_range): New.
	(svalue::maybe_fold_bits_within): New.
	(constant_svalue::maybe_fold_bits_within): New.
	(unknown_svalue::maybe_fold_bits_within): New.
	(unaryop_svalue::maybe_fold_bits_within): New.
	(repeated_svalue::repeated_svalue): New.
	(repeated_svalue::dump_to_pp): New.
	(repeated_svalue::accept): New.
	(repeated_svalue::all_zeroes_p): New.
	(repeated_svalue::maybe_fold_bits_within): New.
	(bits_within_svalue::bits_within_svalue): New.
	(bits_within_svalue::dump_to_pp): New.
	(bits_within_svalue::maybe_fold_bits_within): New.
	(bits_within_svalue::accept): New.
	(bits_within_svalue::implicitly_live_p): New.
	(compound_svalue::maybe_fold_bits_within): New.
	* svalue.h (enum svalue_kind): Add SK_REPEATED and SK_BITS_WITHIN.
	(svalue::dyn_cast_repeated_svalue): New.
	(svalue::dyn_cast_bits_within_svalue): New.
	(svalue::extract_bit_range): New decl.
	(svalue::maybe_fold_bits_within): New vfunc decl.
	(region_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(region_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<region_svalue::key_t>::empty_zero_p): Make false.
	(constant_svalue::maybe_fold_bits_within): New.
	(unknown_svalue::maybe_fold_bits_within): New.
	(poisoned_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(poisoned_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<poisoned_svalue::key_t>::empty_zero_p): Make
	false.
	(setjmp_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(setjmp_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<setjmp_svalue::key_t>::empty_zero_p): Make
	false.
	(unaryop_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(unaryop_svalue::key_t::is_empty): Likewise.
	(unaryop_svalue::maybe_fold_bits_within): New.
	(default_hash_traits<unaryop_svalue::key_t>::empty_zero_p): Make
	false.
	(binop_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(binop_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<binop_svalue::key_t>::empty_zero_p): Make
	false.
	(sub_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(sub_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<sub_svalue::key_t>::empty_zero_p): Make
	false.
	(class repeated_svalue): New.
	(is_a_helper <const repeated_svalue *>::test): New.
	(struct default_hash_traits<repeated_svalue::key_t>): New.
	(class bits_within_svalue): New.
	(is_a_helper <const bits_within_svalue *>::test): New.
	(struct default_hash_traits<bits_within_svalue::key_t>): New.
	(widening_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(widening_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<widening_svalue::key_t>::empty_zero_p): Make
	false.
	(compound_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(compound_svalue::key_t::is_empty): Likewise.
	(compound_svalue::maybe_fold_bits_within): New.
	(default_hash_traits<compound_svalue::key_t>::empty_zero_p): Make
	false.

2021-06-28  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (byte_offset_t): New typedef.
	* store.cc (bit_range::dump_to_pp): Dump as a byte range if
	possible.
	(bit_range::as_byte_range): New.
	(byte_range::dump_to_pp): New.
	* store.h (class byte_range): New forward decl.
	(struct bit_range): Add comment.
	(bit_range::as_byte_range): New decl.
	(struct byte_range): New.

2021-06-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101143
	* region-model.cc (compat_types_p): New function.
	(region_model::create_region_for_heap_alloc): Convert assertion to
	an error check.
	(region_model::create_region_for_alloca): Likewise.

2021-06-18  David Malcolm  <dmalcolm@redhat.com>

	* store.cc (binding_cluster::get_any_binding): Make symbolic reads
	from a cluster with concrete bindings return unknown.

2021-06-18  David Malcolm  <dmalcolm@redhat.com>

	* region-model-manager.cc
	(region_model_manager::get_or_create_int_cst): New.
	(region_model_manager::maybe_undo_optimize_bit_field_compare): Use
	it to simplify away a local tree.
	* region-model.cc (region_model::on_setjmp): Likewise.
	(region_model::on_longjmp): Likewise.
	* region-model.h (region_model_manager::get_or_create_int_cst):
	New decl.
	* store.cc (binding_cluster::zero_fill_region): Use it to simplify
	away a local tree.

2021-06-18  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (class custom_event): Make abstract to allow for
	custom vfuncs, splitting existing implementation into...
	(class precanned_custom_event): New subclass.
	(custom_event::get_desc): Move to...
	(precanned_custom_event::get_desc): ...subclass.
	* checker-path.h (class custom_event): Make abstract to allow for
	custom vfuncs, splitting existing implementation into...
	(class precanned_custom_event): New subclass.
	* diagnostic-manager.cc (diagnostic_manager::add_events_for_eedge):
	Use precanned_custom_event.
	* engine.cc
	(stale_jmp_buf::maybe_add_custom_events_for_superedge): Likewise.
	* sm-signal.cc (signal_delivery_edge_info_t::add_events_to_path):
	Likewise.

2021-06-15  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99212
	PR analyzer/101082
	* engine.cc: Include "target.h".
	(impl_run_checkers): Log BITS_BIG_ENDIAN, BYTES_BIG_ENDIAN, and
	WORDS_BIG_ENDIAN.
	* region-model-manager.cc
	(region_model_manager::maybe_fold_binop): Move support for masking
	via ARG0 & CST into...
	(region_model_manager::maybe_undo_optimize_bit_field_compare):
	...this new function.  Flatten by converting from nested
	conditionals to a series of early return statements to reject
	failures.  Reject if type is not unsigned_char_type_node.
	Handle BYTES_BIG_ENDIAN when determining which bits are bound
	in the binding_map.
	* region-model.h
	(region_model_manager::maybe_undo_optimize_bit_field_compare):
	New decl.
	* store.cc (bit_range::dump): New function.
	* store.h (bit_range::dump): New decl.

2021-06-15  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::on_stmt): Handle __analyzer_dump_capacity.
	(exploded_node::on_stmt): Drop m_sm_changes from on_stmt_flags.
	(state_change_requires_new_enode_p): New function...
	(exploded_graph::process_node): Call it, rather than querying
	flags.m_sm_changes, so that dynamic-extent differences can also
	trigger the splitting of nodes.
	* exploded-graph.h (struct on_stmt_flags): Drop field m_sm_changes.
	* program-state.cc (program_state::detect_leaks): Purge dead
	heap-allocated regions from dynamic extents.
	(selftest::test_program_state_1): Fix type of "size_in_bytes".
	(selftest::test_program_state_merging): Likewise.
	* region-model-impl-calls.cc
	(region_model::impl_call_analyzer_dump_capacity): New.
	(region_model::impl_call_free): Remove dynamic extents from the
	freed region.
	* region-model-reachability.h
	(reachable_regions::begin_mutable_base_regs): New.
	(reachable_regions::end_mutable_base_regs): New.
	* region-model.cc: Include "tree-object-size.h".
	(region_model::region_model): Support new field m_dynamic_extents.
	(region_model::operator=): Likewise.
	(region_model::operator==): Likewise.
	(region_model::dump_to_pp): Dump sizes of dynamic regions.
	(region_model::handle_unrecognized_call): Purge dynamic extents
	from any regions that have escaped mutably:.
	(region_model::get_capacity): New function.
	(region_model::add_constraint): Unset dynamic extents when a
	heap-allocated region's address is NULL.
	(region_model::unbind_region_and_descendents): Purge dynamic
	extents of unbound regions.
	(region_model::can_merge_with_p): Call
	m_dynamic_extents.can_merge_with_p.
	(region_model::create_region_for_heap_alloc): Assert that
	size_in_bytes's type is compatible with size_type_node.  Update
	for renaming of record_dynamic_extents to set_dynamic_extents.
	(region_model::create_region_for_alloca): Likewise.
	(region_model::record_dynamic_extents): Rename to...
	(region_model::set_dynamic_extents): ...this.  Assert that
	size_in_bytes's type is compatible with size_type_node.  Add it
	to the m_dynamic_extents map.
	(region_model::get_dynamic_extents): New.
	(region_model::unset_dynamic_extents): New.
	(selftest::test_state_merging): Fix type of "size".
	(selftest::test_malloc_constraints): Likewise.
	(selftest::test_malloc): Verify dynamic extents.
	(selftest::test_alloca): Likewise.
	* region-model.h (region_to_value_map::is_empty): New.
	(region_model::dynamic_extents_t): New typedef.
	(region_model::impl_call_analyzer_dump_capacity): New decl.
	(region_model::get_dynamic_extents): New function.
	(region_model::get_dynamic_extents): New decl.
	(region_model::set_dynamic_extents): New decl.
	(region_model::unset_dynamic_extents): New decl.
	(region_model::get_capacity): New decl.
	(region_model::record_dynamic_extents): Rename to set_dynamic_extents.
	(region_model::m_dynamic_extents): New field.

2021-06-15  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_to_value_map::operator=): New.
	(region_to_value_map::operator==): New.
	(region_to_value_map::dump_to_pp): New.
	(region_to_value_map::dump): New.
	(region_to_value_map::can_merge_with_p): New.
	* region-model.h (class region_to_value_map): New class.

2021-06-13  Trevor Saunders  <tbsaunde@tbsaunde.org>

	* call-string.cc (call_string::call_string): Use range based for
	to iterate over vec<>.
	(call_string::to_json): Likewise.
	(call_string::hash): Likewise.
	(call_string::calc_recursion_depth): Likewise.
	* checker-path.cc (checker_path::fixup_locations): Likewise.
	* constraint-manager.cc (equiv_class::equiv_class): Likewise.
	(equiv_class::to_json): Likewise.
	(equiv_class::hash): Likewise.
	(constraint_manager::to_json): Likewise.
	* engine.cc (impl_region_model_context::on_svalue_leak):
	Likewise.
	(on_liveness_change): Likewise.
	(impl_region_model_context::on_unknown_change): Likewise.
	* program-state.cc (sm_state_map::set_state): Likewise.
	* region-model.cc (test_canonicalization_4): Likewise.

2021-06-11  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (worklist::key_t::cmp): Move sort by call_string to
	before SCC.

2021-06-09  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::get_lvalue_1): Make const.
	(region_model::get_lvalue): Likewise.
	(region_model::get_rvalue_1): Likewise.
	(region_model::get_rvalue): Likewise.
	(region_model::deref_rvalue): Likewise.
	(region_model::get_rvalue_for_bits): Likewise.
	* region-model.h (region_model::get_lvalue): Likewise.
	(region_model::get_rvalue): Likewise.
	(region_model::deref_rvalue): Likewise.
	(region_model::get_rvalue_for_bits): Likewise.
	(region_model::get_lvalue_1): Likewise.
	(region_model::get_rvalue_1): Likewise.

2021-06-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99212
	* region-model-manager.cc
	(region_model_manager::maybe_fold_binop): Add support for folding
	BIT_AND_EXPR of compound_svalue and a mask constant.
	* region-model.cc (region_model::get_rvalue_1): Implement
	BIT_FIELD_REF in terms of...
	(region_model::get_rvalue_for_bits): New function.
	* region-model.h (region_model::get_rvalue_for_bits): New decl.
	* store.cc (bit_range::from_mask): New function.
	(selftest::test_bit_range_intersects_p): New selftest.
	(selftest::assert_bit_range_from_mask_eq): New.
	(ASSERT_BIT_RANGE_FROM_MASK_EQ): New macro.
	(selftest::assert_no_bit_range_from_mask_eq): New.
	(ASSERT_NO_BIT_RANGE_FROM_MASK): New macro.
	(selftest::test_bit_range_from_mask): New selftest.
	(selftest::analyzer_store_cc_tests): Call the new selftests.
	* store.h (bit_range::intersects_p): New.
	(bit_range::from_mask): New decl.
	(concrete_binding::get_bit_range): New accessor.
	(store_manager::get_concrete_binding): New overload taking
	const bit_range &.

2021-06-08  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (int_size_in_bits): New decl.
	* region.cc (int_size_in_bits): New function.
	(region::get_bit_size): Reimplement in terms of the above.

2021-06-08  David Malcolm  <dmalcolm@redhat.com>

	* store.cc (concrete_binding::dump_to_pp): Move bulk of
	implementation to...
	(bit_range::dump_to_pp): ...this new function.
	(bit_range::cmp): New.
	(concrete_binding::overlaps_p): Update for use of bit_range.
	(concrete_binding::cmp_ptr_ptr): Likewise.
	* store.h (struct bit_range): New.
	(class concrete_binding): Replace fields m_start_bit_offset and
	m_size_in_bits with new field m_bit_range.

2021-06-08  David Malcolm  <dmalcolm@redhat.com>

	* svalue.h (conjured_svalue::iterator_t): Delete.

2021-06-03  David Malcolm  <dmalcolm@redhat.com>

	* store.h (store::get_direct_binding): Remove unused decl.
	(store::get_default_binding): Likewise.

2021-06-03  David Malcolm  <dmalcolm@redhat.com>

	* svalue.cc (poisoned_svalue::dump_to_pp): Dump type.
	(compound_svalue::dump_to_pp): Dump any type.

2021-05-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/100615
	* sm-malloc.cc: Include "analyzer/function-set.h".
	(malloc_state_machine::on_stmt): Call unaffected_by_call_p and
	bail on the functions it recognizes.
	(malloc_state_machine::unaffected_by_call_p): New.

2021-05-10  Martin Liska  <mliska@suse.cz>

	* sm-file.cc (is_file_using_fn_p): Use startswith
	function instead of strncmp.

2021-05-10  Martin Liska  <mliska@suse.cz>

	* program-state.cc (program_state::operator=): Remove
	__cplusplus >= 201103.
	(program_state::program_state): Likewise.
	* program-state.h: Likewise.
	* region-model.h (class region_model): Remove dead code.

2021-04-24  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/100244
	* sm-malloc.cc (free_of_non_heap::describe_state_change):
	Bulletproof against change.m_expr being NULL.

2021-04-13  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98599
	* supergraph.cc (saved_uids::make_uid_unique): New.
	(saved_uids::restore_uids): New.
	(supergraph::supergraph): Replace assignments to stmt->uid with
	calls to m_stmt_uids.make_uid_unique.
	(supergraph::~supergraph): New.
	* supergraph.h (class saved_uids): New.
	(supergraph::~supergraph): New decl.
	(supergraph::m_stmt_uids): New field.

2021-04-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/100011
	* region-model.cc (region_model::on_assignment): Avoid NULL
	dereference if ctxt is NULL when assigning from a STRING_CST.

2021-04-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99042
	PR analyzer/99774
	* engine.cc
	(impl_region_model_context::impl_region_model_context): Add
	uncertainty param and use it to initialize m_uncertainty.
	(impl_region_model_context::get_uncertainty): New.
	(impl_sm_context::get_fndecl_for_call): Add NULL for new
	uncertainty param when constructing impl_region_model_context.
	(impl_sm_context::get_state): Likewise.
	(impl_sm_context::set_next_state): Likewise.
	(impl_sm_context::warn): Likewise.
	(exploded_node::on_stmt): Add uncertainty param
	and use it when constructing impl_region_model_context.
	(exploded_node::on_edge): Add uncertainty param and pass
	to on_edge call.
	(exploded_node::detect_leaks): Create uncertainty_t and pass to
	impl_region_model_context.
	(exploded_graph::get_or_create_node): Create uncertainty_t and
	pass to prune_for_point.
	(maybe_process_run_of_before_supernode_enodes): Create
	uncertainty_t and pass to impl_region_model_context.
	(exploded_graph::process_node): Create uncertainty_t instances and
	pass around as needed.
	* exploded-graph.h
	(impl_region_model_context::impl_region_model_context): Add
	uncertainty param.
	(impl_region_model_context::get_uncertainty): New decl.
	(impl_region_model_context::m_uncertainty): New field.
	(exploded_node::on_stmt): Add uncertainty param.
	(exploded_node::on_edge): Likewise.
	* program-state.cc (sm_state_map::on_liveness_change): Get
	uncertainty from context and use it to unset sm-state from
	svalues as appropriate.
	(program_state::on_edge): Add uncertainty param and use it when
	constructing impl_region_model_context.  Fix indentation.
	(program_state::prune_for_point): Add uncertainty param and use it
	when constructing impl_region_model_context.
	(program_state::detect_leaks): Get any uncertainty from ctxt and
	use it to get maybe-live svalues for dest_state, rather than
	definitely-live ones; use this when determining which svalues
	have leaked.
	(selftest::test_program_state_merging): Create uncertainty_t and
	pass to impl_region_model_context.
	* program-state.h (program_state::on_edge): Add uncertainty param.
	(program_state::prune_for_point): Likewise.
	* region-model-impl-calls.cc (call_details::get_uncertainty): New.
	(region_model::impl_call_memcpy): Pass uncertainty to
	mark_region_as_unknown call.
	(region_model::impl_call_memset): Likewise.
	(region_model::impl_call_strcpy): Likewise.
	* region-model-reachability.cc (reachable_regions::handle_sval):
	Also add sval to m_mutable_svals.
	* region-model.cc (region_model::on_assignment): Pass any
	uncertainty from ctxt to the store::set_value call.
	(region_model::handle_unrecognized_call): Get any uncertainty from
	ctxt and use it to record mutable svalues at the unknown call.
	(region_model::get_reachable_svalues): Add uncertainty param and
	use it to mark any maybe-bound svalues as being reachable.
	(region_model::set_value): Pass any uncertainty from ctxt to the
	store::set_value call.
	(region_model::mark_region_as_unknown): Add uncertainty param and
	pass it on to the store::mark_region_as_unknown call.
	(region_model::update_for_call_summary): Add uncertainty param and
	pass it on to the region_model::mark_region_as_unknown call.
	* region-model.h (call_details::get_uncertainty): New decl.
	(region_model::get_reachable_svalues): Add uncertainty param.
	(region_model::mark_region_as_unknown): Add uncertainty param.
	(region_model_context::get_uncertainty): New vfunc.
	(noop_region_model_context::get_uncertainty): New vfunc
	implementation.
	* store.cc (dump_svalue_set): New.
	(uncertainty_t::dump_to_pp): New.
	(uncertainty_t::dump): New.
	(binding_cluster::clobber_region): Pass NULL for uncertainty to
	remove_overlapping_bindings.
	(binding_cluster::mark_region_as_unknown): Add uncertainty param
	and pass it to remove_overlapping_bindings.
	(binding_cluster::remove_overlapping_bindings): Add uncertainty param.
	Use it to record any svalues that were in clobbered bindings.
	(store::set_value): Add uncertainty param.  Pass it to
	binding_cluster::mark_region_as_unknown when handling symbolic
	regions.
	(store::mark_region_as_unknown): Add uncertainty param and pass it
	to binding_cluster::mark_region_as_unknown.
	(store::remove_overlapping_bindings): Add uncertainty param and
	pass it to binding_cluster::remove_overlapping_bindings.
	* store.h (binding_cluster::mark_region_as_unknown): Add
	uncertainty param.
	(binding_cluster::remove_overlapping_bindings): Likewise.
	(store::set_value): Likewise.
	(store::mark_region_as_unknown): Likewise.

2021-04-05  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99906
	* analyzer.cc (maybe_reconstruct_from_def_stmt): Fix NULL
	dereference on calls with zero arguments.
	* sm-malloc.cc (malloc_state_machine::on_stmt): When handling
	__attribute__((nonnull)), only call get_diagnostic_tree if the
	result will be used.

2021-04-05  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99886
	* diagnostic-manager.cc
	(diagnostic_manager::prune_interproc_events): Use signed integers
	when subtracting one from path->num_events ().
	(diagnostic_manager::consolidate_conditions): Likewise.  Convert
	next_idx to a signed int.

2021-04-01  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (diagnostic_manager::add_diagnostic): Make
	enode param non-constant, and call add_diagnostic on it.  Add
	enode index to log message.
	(diagnostic_manager::add_diagnostic): Make enode param
	non-constant.
	* diagnostic-manager.h (diagnostic_manager::add_diagnostic):
	Likewise for both decls.
	* engine.cc
	(impl_region_model_context::impl_region_model_context): Likewise
	for enode_for_diag.
	(impl_sm_context::impl_sm_context): Likewise.
	(impl_sm_context::m_enode_for_diag): Likewise.
	(exploded_node::dump_dot): Don't pass the diagnostic manager
	to dump_saved_diagnostics.
	(exploded_node::dump_saved_diagnostics): Drop param.  Iterate
	directly through all saved diagnostics for the enode, rather
	than all saved diagnostics in the diagnostic_manager and
	filtering.
	(exploded_node::on_stmt): Make non-const.
	(exploded_node::on_edge): Likewise.
	(exploded_node::on_longjmp): Likewise.
	(exploded_node::detect_leaks): Likewise.
	(exploded_graph::get_or_create_node): Make enode_for_diag param
	non-const.
	(exploded_graph_annotator::print_enode): Iterate
	directly through all saved diagnostics for the enode, rather
	than all saved diagnostics in the diagnostic_manager and
	filtering.
	* exploded-graph.h
	(impl_region_model_context::impl_region_model_context): Make
	enode_for_diag param non-constant.
	(impl_region_model_context::m_enode_for_diag): Likewise.
	(exploded_node::dump_saved_diagnostics): Drop param.
	(exploded_node::on_stmt): Make non-const.
	(exploded_node::on_edge): Likewise.
	(exploded_node::on_longjmp): Likewise.
	(exploded_node::detect_leaks): Likewise.
	(exploded_node::add_diagnostic): New.
	(exploded_node::get_num_diagnostics): New.
	(exploded_node::get_saved_diagnostic): New.
	(exploded_node::m_saved_diagnostics): New.
	(exploded_graph::get_or_create_node): Make enode_for_diag param
	non-constant.
	* feasible-graph.cc (feasible_node::dump_dot): Drop
	diagnostic_manager from call to dump_saved_diagnostics.
	* program-state.cc (program_state::on_edge): Convert enode param
	to non-const pointer.
	(program_state::prune_for_point): Likewise for enode_for_diag
	param.
	* program-state.h (program_state::on_edge): Convert enode param
	to non-const pointer.
	(program_state::prune_for_point): Likewise for enode_for_diag
	param.

2021-03-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99771
	* analyzer.cc (maybe_reconstruct_from_def_stmt): New.
	(fixup_tree_for_diagnostic_1): New.
	(fixup_tree_for_diagnostic): New.
	* analyzer.h (fixup_tree_for_diagnostic): New decl.
	* checker-path.cc (call_event::get_desc): Call
	fixup_tree_for_diagnostic and use it for the call_with_state call.
	(warning_event::get_desc): Likewise for the final_event and
	make_label_text calls.
	* engine.cc (impl_region_model_context::on_state_leak): Likewise
	for the on_leak and add_diagnostic calls.
	* region-model.cc (region_model::get_representative_tree):
	Likewise for the result.

2021-03-30  David Malcolm  <dmalcolm@redhat.com>

	* region.h (region::dump_to_pp): Remove old decl.

2021-03-30  David Malcolm  <dmalcolm@redhat.com>

	* sm-file.cc (fileptr_state_machine::on_stmt): Only call
	get_diagnostic_tree if the result will be used.
	* sm-malloc.cc (malloc_state_machine::on_stmt): Likewise.
	(malloc_state_machine::on_deallocator_call): Likewise.
	(malloc_state_machine::on_realloc_call): Likewise.
	(malloc_state_machine::on_realloc_call): Likewise.
	* sm-sensitive.cc
	(sensitive_state_machine::warn_for_any_exposure): Likewise.
	* sm-taint.cc (taint_state_machine::on_stmt): Likewise.

2021-03-25  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93695
	PR analyzer/99044
	PR analyzer/99716
	* engine.cc (exploded_node::on_stmt): Clear sm-state involving
	an SSA name at the def-stmt of that SSA name.
	* program-state.cc (sm_state_map::purge_state_involving): New.
	* program-state.h (sm_state_map::purge_state_involving): New decl.
	* region-model.cc (selftest::test_involves_p): New.
	(selftest::analyzer_region_model_cc_tests): Call it.
	* svalue.cc (class involvement_visitor): New class
	(svalue::involves_p): New.
	* svalue.h (svalue::involves_p): New decl.

2021-03-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99614
	* diagnostic-manager.cc (class epath_finder): Add
	DISABLE_COPY_AND_ASSIGN.

2021-03-15  Martin Liska  <mliska@suse.cz>

	* sm-file.cc (get_file_using_fns): Add missing comma in initializer.

2021-03-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96374
	* analyzer.opt (-param=analyzer-max-infeasible-edges=): New param.
	(fdump-analyzer-feasibility): New flag.
	* diagnostic-manager.cc: Include "analyzer/trimmed-graph.h" and
	"analyzer/feasible-graph.h".
	(epath_finder::epath_finder): Convert m_sep to a pointer and
	only create it if !flag_analyzer_feasibility.
	(epath_finder::~epath_finder): New.
	(epath_finder::m_sep): Convert to a pointer.
	(epath_finder::get_best_epath): Add param "diag_idx" and use it
	when logging.  Rather than finding the shortest path and then
	checking feasibility, instead use explore_feasible_paths unless
	!flag_analyzer_feasibility, in which case simply use the shortest
	path, and note if it is infeasible.  Update for m_sep becoming a
	pointer.
	(class feasible_worklist): New.
	(epath_finder::explore_feasible_paths): New.
	(epath_finder::process_worklist_item): New.
	(class dump_eg_with_shortest_path): New.
	(epath_finder::dump_trimmed_graph): New.
	(epath_finder::dump_feasible_graph): New.
	(saved_diagnostic::saved_diagnostic): Add "idx" param, using it
	on new field m_idx.
	(saved_diagnostic::to_json): Dump m_idx.
	(saved_diagnostic::calc_best_epath): Pass m_idx to get_best_epath.
	Remove assertion that m_problem was set when m_best_epath is NULL.
	(diagnostic_manager::add_diagnostic): Pass an index when created
	saved_diagnostic instances.
	* diagnostic-manager.h (saved_diagnostic::saved_diagnostic): Add
	"idx" param.
	(saved_diagnostic::get_index): New accessor.
	(saved_diagnostic::m_idx): New field.
	* engine.cc (exploded_node::dump_dot): Call args.dump_extra_info.
	Move code to...
	(exploded_node::dump_processed_stmts): ...this new function and...
	(exploded_node::dump_saved_diagnostics): ...this new function.
	Add index of each diagnostic.
	(exploded_edge::dump_dot):  Move bulk of code to...
	(exploded_edge::dump_dot_label): ...this new function.
	* exploded-graph.h (eg_traits::dump_args_t::dump_extra_info): New
	vfunc.
	(exploded_node::dump_processed_stmts): New decl.
	(exploded_node::dump_saved_diagnostics): New decl.
	(exploded_edge::dump_dot_label): New decl.
	* feasible-graph.cc: New file.
	* feasible-graph.h: New file.
	* trimmed-graph.cc: New file.
	* trimmed-graph.h: New file.

2021-03-11  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (epath_finder::epath_finder):
	Update shortest_paths init for new param.

2021-03-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96374
	* engine.cc (exploded_path::feasible_p): Move "snodes_visited" and
	"model" locals into a new class feasibility_state.  Move heart
	of per-edge processing into
	feasibility_state::maybe_update_for_edge.
	(feasibility_state::feasibility_state): New.
	(feasibility_state::maybe_update_for_edge): New, based on loop
	body in exploded_path::feasible_p.
	* exploded-graph.h (class feasibility_state): New.

2021-03-10  David Malcolm  <dmalcolm@redhat.com>

	* supergraph.h
	(callgraph_superedge::dyn_cast_callgraph_superedge): New.
	(call_superedge::dyn_cast_callgraph_superedge): Delete.
	(return_superedge::dyn_cast_callgraph_superedge): Delete.

2021-03-02  Martin Liska  <mliska@suse.cz>

	* diagnostic-manager.cc (diagnostic_manager::emit_saved_diagnostics):
	Do not pass engine.

2021-02-26  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_path::exploded_path): New copy-ctor.
	* exploded-graph.h (exploded_path::operator=): Drop decl.

2021-02-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96374
	* diagnostic-manager.cc (class epath_finder): New.
	(epath_finder::get_best_epath): New.
	(saved_diagnostic::saved_diagnostic): Update for replacement of
	m_state and m_epath_length with m_best_epath.
	(saved_diagnostic::~saved_diagnostic): Delete m_best_epath.
	(saved_diagnostic::to_json): Update "path_length" to be optional.
	(saved_diagnostic::calc_best_epath): New, based on
	dedupe_winners::add and parts of dedupe_key::dedupe_key.
	(saved_diagnostic::get_epath_length): New.
	(saved_diagnostic::add_duplicate): New.
	(dedupe_key::dedupe_key): Drop epath param.  Move invocation of
	stmt_finder to saved_diagnostic::calc_best_epath.
	(class dedupe_candidate): Delete.
	(class dedupe_hash_map_traits): Update to use saved_diagnotic *
	rather than dedupe_candidate * as the value_type/compare_type.
	(dedupe_winners::~dedupe_winners): Don't delete the values.
	(dedupe_winners::add): Convert param from shortest_exploded_paths to
	epath_finder.  Drop "eg" param.  Drop dedupe_candidate, moving
	path generation and feasiblity checking to
	epath_finder::get_best_epath.  Update winner-selection for move
	of epaths from dedupe_candidate to saved_diagnostic.
	(dedupe_winners::emit_best):  Update for removal of class
	dedupe_candidate.
	(dedupe_winners::map_t): Update to use saved_diagnotic * rather
	than dedupe_candidate * as the value_type/compare_type.
	(diagnostic_manager::emit_saved_diagnostics): Move
	shortest_exploded_paths instance into epath_finder and pass that
	around instead.
	(diagnostic_manager::emit_saved_diagnostic): Drop epath, stmt
	and num_dupes params, instead getting these from the
	saved_diagnostic.  Use correct location in inform_n call.
	* diagnostic-manager.h (class epath_finder): New forward decl.
	(saved_diagnostic::status): Drop enum.
	(saved_diagnostic::set_feasible): Drop.
	(saved_diagnostic::set_infeasible): Drop.
	(saved_diagnostic::get_status): Drop.
	(saved_diagnostic::calc_best_epath): New decl.
	(saved_diagnostic::get_best_epath): New decl.
	(saved_diagnostic::get_epath_length): New decl.
	(saved_diagnostic::set_epath_length): Drop.
	(saved_diagnostic::get_epath_length): Drop inline implementation.
	(saved_diagnostic::add_duplicate): New.
	(saved_diagnostic::get_num_dupes): New.
	(saved_diagnostic::m_d): Document ownership.
	(saved_diagnostic::m_trailing_eedge): Make const.
	(saved_diagnostic::m_status): Drop field.
	(saved_diagnostic::m_epath_length): Drop field.
	(saved_diagnostic::m_best_epath): New field.
	(saved_diagnostic::m_problem): Document ownership.
	(saved_diagnostic::m_duplicates): New field.
	(diagnostic_manager::emit_saved_diagnostic): Drop params epath,
	stmt, and num_dupes.
	* engine.cc (exploded_graph_annotator::print_saved_diagnostic):
	Update for changes to saved_diagnostic class.
	* exploded-graph.h (exploded_path::feasible_p): Drop unused
	overloaded decl.

2021-02-25  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99193
	* region-model-impl-calls.cc (region_model::impl_call_realloc): New.
	* region-model.cc (region_model::on_call_pre): Call it.
	* region-model.h (region_model::impl_call_realloc): New decl.
	* sm-malloc.cc (enum wording): Add WORDING_REALLOCATED.
	(malloc_state_machine::m_realloc): New field.
	(use_after_free::describe_state_change): Add case for
	WORDING_REALLOCATED.
	(use_after_free::describe_final_event): Likewise.
	(malloc_state_machine::malloc_state_machine): Initialize
	m_realloc.
	(malloc_state_machine::on_stmt): Handle realloc by calling...
	(malloc_state_machine::on_realloc_call): New.

2021-02-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99196
	* engine.cc (exploded_node::on_stmt): Provide terminate_path
	flag as a way for on_call_pre to terminate the current analysis
	path.
	* region-model-impl-calls.cc (call_details::num_args): New.
	(region_model::impl_call_error): New.
	* region-model.cc (region_model::on_call_pre): Add param
	"out_terminate_path".  Handle "error" and "error_at_line".
	* region-model.h (call_details::num_args): New decl.
	(region_model::on_call_pre): Add param "out_terminate_path".
	(region_model::impl_call_error): New decl.

2021-02-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98969
	* constraint-manager.cc (dead_svalue_purger::should_purge_p):
	Update for change to svalue::live_p.
	* program-state.cc (sm_state_map::on_liveness_change): Likewise.
	(program_state::detect_leaks): Likewise.
	* region-model-reachability.cc (reachable_regions::init_cluster):
	When dealing with a symbolic region, if the underlying pointer is
	implicitly live, add the region to the reachable regions.
	* region-model.cc (region_model::compare_initial_and_pointer):
	Move logic for detecting initial values of params to
	initial_svalue::initial_value_of_param_p.
	* svalue.cc (svalue::live_p): Convert "live_svalues" from a
	reference to a pointer; support it being NULL.
	(svalue::implicitly_live_p): Convert first param from a
	refererence to a pointer.
	(region_svalue::implicitly_live_p): Likewise.
	(constant_svalue::implicitly_live_p): Likewise.
	(initial_svalue::implicitly_live_p): Likewise.  Treat the initial
	values of params for the top level frame as still live.
	(initial_svalue::initial_value_of_param_p): New function, taken
	from a test in region_model::compare_initial_and_pointer.
	(unaryop_svalue::implicitly_live_p): Convert first param from a
	refererence to a pointer.
	(binop_svalue::implicitly_live_p): Likewise.
	(sub_svalue::implicitly_live_p): Likewise.
	(unmergeable_svalue::implicitly_live_p): Likewise.
	* svalue.h (svalue::live_p): Likewise.
	(svalue::implicitly_live_p): Likewise.
	(region_svalue::implicitly_live_p): Likewise.
	(constant_svalue::implicitly_live_p): Likewise.
	(initial_svalue::implicitly_live_p): Likewise.
	(initial_svalue::initial_value_of_param_p): New decl.
	(unaryop_svalue::implicitly_live_p): Convert first param from a
	refererence to a pointer.
	(binop_svalue::implicitly_live_p): Likewise.
	(sub_svalue::implicitly_live_p): Likewise.
	(unmergeable_svalue::implicitly_live_p): Likewise.

2021-02-12  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98969
	* engine.cc (readability): Add names for the various arbitrary
	values.  Handle NOP_EXPR and INTEGER_CST.
	(readability_comparator): Combine the readability tests for
	tree and stack depth, rather than performing them sequentially.
	(impl_region_model_context::on_state_leak): Strip off top-level
	casts.
	* region-model.cc (region_model::get_representative_path_var): Add
	type-checking, moving the bulk of the implementation to...
	(region_model::get_representative_path_var_1): ...here.  Respect
	types in casts by recursing and re-adding the cast, rather than
	merely stripping them off.  Use the correct type when handling
	region_svalue.
	(region_model::get_representative_tree): Strip off any top-level
	cast.
	(region_model::get_representative_path_var): Add type-checking,
	moving the bulk of the implementation to...
	(region_model::get_representative_path_var_1): ...here.
	* region-model.h (region_model::get_representative_path_var_1):
	New decl
	(region_model::get_representative_path_var_1): New decl.
	* store.cc (append_pathvar_with_type): New.
	(binding_cluster::get_representative_path_vars): Cast path_vars
	to the correct type when adding them to *OUT_PVS.

2021-02-09  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98575
	* sm-file.cc (is_file_using_fn_p): Support "_IO_"-prefixed
	variants.

2021-02-09  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98575
	* store.cc (store::set_value): Treat a pointer written to *UNKNOWN
	as having escaped.

2021-02-02  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93355
	PR analyzer/96374
	* engine.cc (toplevel_function_p): Simplify so that
	we only reject functions with a "__analyzer_" prefix.
	(add_any_callbacks): Delete.
	(exploded_graph::build_initial_worklist): Update for
	dropped param of toplevel_function_p.
	(exploded_graph::build_initial_worklist): Don't bother
	looking for callbacks that are reachable from global
	initializers.

2021-02-01  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98918
	* region-model-manager.cc
	(region_model_manager::get_or_create_initial_value):
	Fold the initial value of *UNKNOWN_PTR to an UNKNOWN value.
	(region_model_manager::get_field_region): Fold the value
	of UNKNOWN_PTR->FIELD to *UNKNOWN_PTR_OF_&FIELD_TYPE.

2021-01-29  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (event_kind_to_string): Handle
	EK_START_CONSOLIDATED_CFG_EDGES and
	EK_END_CONSOLIDATED_CFG_EDGES.
	(start_consolidated_cfg_edges_event::get_desc): New.
	(checker_path::cfg_edge_pair_at_p): New.
	* checker-path.h (enum event_kind): Add
	EK_START_CONSOLIDATED_CFG_EDGES and
	EK_END_CONSOLIDATED_CFG_EDGES.
	(class start_consolidated_cfg_edges_event): New class.
	(class end_consolidated_cfg_edges_event): New class.
	(checker_path::delete_events): New.
	(checker_path::replace_event): New.
	(checker_path::cfg_edge_pair_at_p): New decl.
	* diagnostic-manager.cc (diagnostic_manager::prune_path): Call
	consolidate_conditions.
	(same_line_as_p): New.
	(diagnostic_manager::consolidate_conditions): New.
	* diagnostic-manager.h
	(diagnostic_manager::consolidate_conditions): New decl.

2021-01-18  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (is_std_named_call_p): New decl.
	* diagnostic-manager.cc (path_builder::get_sm): New.
	(state_change_event_creator::state_change_event_creator): Add "pb"
	param.
	(state_change_event_creator::on_global_state_change): Don't consider
	state changes affecting other state_machines.
	(state_change_event_creator::on_state_change): Likewise.
	(state_change_event_creator::m_pb): New field.
	(diagnostic_manager::add_events_for_eedge): Pass pb to visitor
	ctor.
	* region-model-impl-calls.cc
	(region_model::impl_deallocation_call): New.
	* region-model.cc: Include "attribs.h".
	(region_model::on_call_post): Handle fndecls referenced by
	__attribute__((deallocated_by(FOO))).
	* region-model.h (region_model::impl_deallocation_call): New decl.
	* sm-malloc.cc: Include "stringpool.h" and "attribs.h".  Add
	leading comment.
	(class api): Delete.
	(enum resource_state): Update comment for change from api to
	deallocator and deallocator_set.
	(allocation_state::allocation_state): Drop api param.  Add
	"deallocators" and "deallocator".
	(allocation_state::m_api): Drop field in favor of...
	(allocation_state::m_deallocators): New field.
	(allocation_state::m_deallocator): New field.
	(enum wording): Add WORDING_DEALLOCATED.
	(struct deallocator): New.
	(struct standard_deallocator): New.
	(struct custom_deallocator): New.
	(struct deallocator_set): New.
	(struct custom_deallocator_set): New.
	(struct standard_deallocator_set): New.
	(struct deallocator_set_map_traits): New.
	(malloc_state_machine::m_malloc): Drop field
	(malloc_state_machine::m_scalar_new): Likewise.
	(malloc_state_machine::m_vector_new): Likewise.
	(malloc_state_machine::m_free): New field
	(malloc_state_machine::m_scalar_delete): Likewise.
	(malloc_state_machine::m_vector_delete): Likewise.
	(malloc_state_machine::deallocator_map_t): New typedef.
	(malloc_state_machine::m_deallocator_map): New field.
	(malloc_state_machine::deallocator_set_cache_t): New typedef.
	(malloc_state_machine::m_custom_deallocator_set_cache): New field.
	(malloc_state_machine::custom_deallocator_set_map_t): New typedef.
	(malloc_state_machine::m_custom_deallocator_set_map): New field.
	(malloc_state_machine::m_dynamic_sets): New field.
	(malloc_state_machine::m_dynamic_deallocators): New field.
	(api::api): Delete.
	(deallocator::deallocator): New ctor.
	(deallocator::hash): New.
	(deallocator::dump_to_pp): New.
	(deallocator::cmp): New.
	(deallocator::cmp_ptr_ptr): New.
	(standard_deallocator::standard_deallocator): New ctor.
	(deallocator_set::deallocator_set): New ctor.
	(deallocator_set::dump): New.
	(custom_deallocator_set::custom_deallocator_set): New ctor.
	(custom_deallocator_set::contains_p): New.
	(custom_deallocator_set::maybe_get_single): New.
	(custom_deallocator_set::dump_to_pp): New.
	(standard_deallocator_set::standard_deallocator_set): New ctor.
	(standard_deallocator_set::contains_p): New.
	(standard_deallocator_set::maybe_get_single): New.
	(standard_deallocator_set::dump_to_pp): New.
	(start_p): New.
	(class mismatching_deallocation): Update for conversion from api
	to deallocator_set and deallocator.
	(double_free::emit): Use %qs.
	(class use_after_free): Update for conversion from api to
	deallocator_set and deallocator.
	(malloc_leak::describe_state_change): Only emit "allocated here" on
	a start->nonnull transition, rather than on other transitions to
	nonnull.
	(allocation_state::dump_to_pp): Update for conversion from api to
	deallocator_set.
	(allocation_state::get_nonnull): Likewise.
	(malloc_state_machine::malloc_state_machine): Likewise.
	(malloc_state_machine::~malloc_state_machine): New.
	(malloc_state_machine::add_state): Update for conversion from api
	to deallocator_set.
	(malloc_state_machine::get_or_create_custom_deallocator_set): New.
	(malloc_state_machine::maybe_create_custom_deallocator_set): New.
	(malloc_state_machine::get_or_create_deallocator): New.
	(malloc_state_machine::on_stmt): Update for conversion from api
	to deallocator_set.  Handle "__attribute__((malloc(FOO)))", and
	the special attribute set on FOO.
	(malloc_state_machine::on_allocator_call): Update for conversion
	from api to deallocator_set.  Add "returns_nonnull" param and use
	it to affect which state to transition to.
	(malloc_state_machine::on_deallocator_call): Update for conversion
	from api to deallocator_set.

2021-01-14  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (strongly_connected_components::to_json): New.
	(worklist::to_json): New.
	(exploded_graph::to_json): JSON-ify the worklist.
	* exploded-graph.h (strongly_connected_components::to_json): New
	decl.
	(worklist::to_json): New decl.
	* store.cc (store::to_json): Fix comment.
	* supergraph.cc (supernode::to_json): Fix reference to
	"returning_call" in comment.  Add optional "fun" to JSON.
	(edge_kind_to_string): New.
	(superedge::to_json): Add "kind" to JSON.

2021-01-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98679
	* analyzer.h (region_offset::operator==): Make const.
	* pending-diagnostic.h (pending_diagnostic::equal_p): Likewise.
	* store.h (binding_cluster::for_each_value): Likewise.
	(binding_cluster::for_each_binding): Likewise.

2021-01-12  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98628
	* store.cc (binding_cluster::make_unknown_relative_to): Don't mark
	dereferenced unknown pointers as having escaped.

2021-01-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98580
	* region.cc (decl_region::get_svalue_for_initializer): Gracefully
	handle when LTO writes out DECL_INITIAL as error_mark_node.

2021-01-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97074
	* store.cc (binding_cluster::can_merge_p): Add "out_store" param
	and pass to calls to binding_cluster::make_unknown_relative_to.
	(binding_cluster::make_unknown_relative_to): Add "out_store"
	param.  Use it to mark base regions that are pointed to by
	pointers that become unknown as having escaped.
	(store::can_merge_p): Pass out_store to
	binding_cluster::can_merge_p.
	* store.h (binding_cluster::can_merge_p): Add "out_store" param.
	(binding_cluster::make_unknown_relative_to): Likewise.
	* svalue.cc (region_svalue::implicitly_live_p): New vfunc.
	* svalue.h (region_svalue::implicitly_live_p): New vfunc decl.

2021-01-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98564
	* engine.cc (exploded_path::feasible_p): Add missing call to
	bitmap_clear.

2021-01-06  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97072
	* region-model-reachability.cc (reachable_regions::init_cluster):
	Convert symbolic region handling to a switch statement.  Add cases
	to handle SK_UNKNOWN and SK_CONJURED.

2021-01-05  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98293
	* store.cc (binding_map::apply_ctor_to_region): When "index" is
	NULL, iterate through the fields for RECORD_TYPEs, rather than
	creating an INTEGER_CST index.

2020-11-30  David Malcolm  <dmalcolm@redhat.com>

	* analyzer-pass.cc: Include "analyzer/analyzer.h" for the
	declaration of sorry_no_analyzer; include "tree.h" and
	"function.h" as these are needed by it.

2020-11-30  David Malcolm  <dmalcolm@redhat.com>

	* analyzer-pass.cc (pass_analyzer::execute): Move sorry call to...
	(sorry_no_analyzer): New.
	* analyzer.h (class state_machine): New forward decl.
	(class logger): New forward decl.
	(class plugin_analyzer_init_iface): New.
	(sorry_no_analyzer): New decl.
	* checker-path.cc (checker_path::fixup_locations): New.
	* checker-path.h (checker_event::set_location): New.
	(checker_path::fixup_locations): New decl.
	* diagnostic-manager.cc
	(diagnostic_manager::emit_saved_diagnostic): Call
	checker_path::fixup_locations, and call fixup_location
	on the primary location.
	* engine.cc: Include "plugin.h".
	(class plugin_analyzer_init_impl): New.
	(impl_run_checkers): Invoke PLUGIN_ANALYZER_INIT callbacks.
	* pending-diagnostic.h (pending_diagnostic::fixup_location): New
	vfunc.

2020-11-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97893
	* sm-malloc.cc (null_deref::emit): Use CWE-476 rather than
	CWE-690, as this isn't due to an unchecked return value.
	(null_arg::emit): Likewise.

2020-11-12  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.h (checker_event::get_id_ptr): New.
	* diagnostic-manager.cc (path_builder::path_builder): Add "sd"
	param and use it to initialize new field "m_sd".
	(path_builder::get_pending_diagnostic): New.
	(path_builder::m_sd): New field.
	(diagnostic_manager::emit_saved_diagnostic): Pass sd to
	path_builder ctor.
	(diagnostic_manager::add_events_for_superedge): Call new
	maybe_add_custom_events_for_superedge vfunc.
	* engine.cc (stale_jmp_buf::stale_jmp_buf): Add "setjmp_point"
	param and use it to initialize new field "m_setjmp_point".
	Initialize new field "m_stack_pop_event".
	(stale_jmp_buf::maybe_add_custom_events_for_superedge): New vfunc
	implementation.
	(stale_jmp_buf::describe_final_event): New vfunc implementation.
	(stale_jmp_buf::m_setjmp_point): New field.
	(stale_jmp_buf::m_stack_pop_event): New field.
	(exploded_node::on_longjmp): Pass setjmp_point to stale_jmp_buf
	ctor.
	* pending-diagnostic.h
	(pending_diagnostic::maybe_add_custom_events_for_superedge): New
	vfunc.

2020-11-12  David Malcolm  <dmalcolm@redhat.com>

	PR tree-optimization/97424
	* analyzer.opt (Wanalyzer-shift-count-negative): New.
	(Wanalyzer-shift-count-overflow): New.
	* region-model.cc (class shift_count_negative_diagnostic): New.
	(class shift_count_overflow_diagnostic): New.
	(region_model::get_gassign_result): Complain about shift counts that
	are negative or are >= the operand's type's width.

2020-11-10  Martin Liska  <mliska@suse.cz>

	* constraint-manager.cc (constraint_manager::merge): Remove
	unused code.
	* constraint-manager.h: Likewise.
	* program-state.cc (sm_state_map::sm_state_map): Likewise.
	(program_state::program_state): Likewise.
	(test_sm_state_map): Likewise.
	* program-state.h: Likewise.
	* region-model-reachability.cc (reachable_regions::reachable_regions): Likewise.
	* region-model-reachability.h: Likewise.
	* region-model.cc (region_model::handle_unrecognized_call): Likewise.
	(region_model::get_reachable_svalues): Likewise.
	(region_model::can_merge_with_p): Likewise.

2020-11-05  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97668
	* svalue.cc (cmp_cst): Handle COMPLEX_CST.

2020-10-29  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (sm_state_map::on_liveness_change): Sort the
	leaking svalues before calling on_state_leak.
	(program_state::detect_leaks): Likewise when calling
	on_svalue_leak.
	* region-model-reachability.cc
	(reachable_regions::mark_escaped_clusters): Likewise when
	calling on_escaped_function.

2020-10-29  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97608
	* region-model-reachability.cc (reachable_regions::handle_sval):
	Operands of reachable reversible operations are reachable.

2020-10-29  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (class state_machine): New forward decl.
	(class logger): Likewise.
	(class visitor): Likewise.
	* complexity.cc: New file, taken from svalue.cc.
	* complexity.h: New file, taken from region-model.h.
	* region-model.h: Include "analyzer/svalue.h" and
	"analyzer/region.h".  Move struct complexity to complexity.h.
	Move svalue, its subclasses and supporting decls to svalue.h.
	Move region, its subclasses and supporting decls to region.h.
	* region.cc: Include "analyzer/region.h".
	(symbolic_region::symbolic_region): Move here from region-model.h.
	* region.h: New file, based on material from region-model.h.
	* svalue.cc: Include "analyzer/svalue.h".
	(complexity::complexity): Move to complexity.cc.
	(complexity::from_pair): Likewise.
	* svalue.h: New file, based on material from region-model.h.

2020-10-29  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (sm_state_map::print): Guard the printing of
	the origin pointer with !flag_dump_noaddr.
	* region.cc (string_region::dump_to_pp): Likewise for
	m_string_cst.

2020-10-27  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97568
	* region-model.cc (region_model::get_initial_value_for_global):
	Move check that !DECL_EXTERNAL from here to...
	* region.cc (decl_region::get_svalue_for_initializer): ...here,
	using it to reject zero initialization.

2020-10-27  Markus Böck  <markus.boeck02@gmail.com>

	PR analyzer/96608
	* store.h (hash): Cast to intptr_t instead of long

2020-10-27  David Malcolm  <dmalcolm@redhat.com>

	* constraint-manager.cc (svalue_cmp_by_ptr): Delete.
	(equiv_class::canonicalize): Use svalue::cmp_ptr_ptr instead.
	(equiv_class_cmp): Eliminate pointer comparison.
	* diagnostic-manager.cc (dedupe_key::comparator): If they are at
	the same location, also compare epath ength and pending_diagnostic
	kind.
	* engine.cc (readability_comparator): If two path_vars have the
	same readability, then impose an arbitrary ordering on them.
	(worklist::key_t::cmp): If two points have the same plan ordering,
	continue the comparison.  Call sm_state_map::cmp rather than
	comparing hash values.
	* program-state.cc (sm_state_map::entry_t::cmp): New.
	(sm_state_map::cmp): New.
	* program-state.h (sm_state_map::entry_t::cmp): New decl.
	(sm_state_map::elements): New.
	(sm_state_map::cmp): New.

2020-10-27  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (setjmp_record::cmp): New.
	(supernode_cluster::dump_dot): Avoid embedding pointer in cluster
	name.
	(supernode_cluster::cmp_ptr_ptr): New.
	(function_call_string_cluster::dump_dot): Avoid embedding pointer
	in cluster name.  Sort m_map when dumping child clusters.
	(function_call_string_cluster::cmp_ptr_ptr): New.
	(root_cluster::dump_dot): Sort m_map when dumping child clusters.
	* program-point.cc (function_point::cmp): New.
	(function_point::cmp_ptr): New.
	* program-point.h (function_point::cmp): New decl.
	(function_point::cmp_ptr): New decl.
	* program-state.cc (sm_state_map::print): Sort the values.  Guard
	the printing of pointers with !flag_dump_noaddr.
	(program_state::prune_for_point): Sort the regions.
	(log_set_of_svalues): Sort the values.  Guard the printing of
	pointers with !flag_dump_noaddr.
	* region-model-manager.cc (log_uniq_map): Sort the values.
	* region-model-reachability.cc (dump_set): New function template.
	(reachable_regions::dump_to_pp): Use it.
	* region-model.h (svalue::cmp_ptr): New decl.
	(svalue::cmp_ptr_ptr): New decl.
	(setjmp_record::cmp): New decl.
	(placeholder_svalue::get_name): New accessor.
	(widening_svalue::get_point): New accessor.
	(compound_svalue::get_map): New accessor.
	(conjured_svalue::get_stmt): New accessor.
	(conjured_svalue::get_id_region): New accessor.
	(region::cmp_ptrs): Rename to...
	(region::cmp_ptr_ptr): ...this.
	* region.cc (region::cmp_ptrs): Rename to...
	(region::cmp_ptr_ptr): ...this.
	* state-purge.cc
	(state_purge_per_ssa_name::state_purge_per_ssa_name): Sort
	m_points_needing_name when dumping.
	* store.cc (concrete_binding::cmp_ptr_ptr): New.
	(symbolic_binding::cmp_ptr_ptr): New.
	(binding_map::cmp): New.
	(get_sorted_parent_regions): Update for renaming of
	region::cmp_ptrs to region::cmp_ptr_ptr.
	(store::dump_to_pp): Likewise.
	(store::to_json): Likewise.
	(store::can_merge_p): Sort the base regions before considering
	them.
	* store.h (concrete_binding::cmp_ptr_ptr): New decl.
	(symbolic_binding::cmp_ptr_ptr): New decl.
	(binding_map::cmp): New decl.
	* supergraph.cc (supergraph::supergraph): Assign UIDs to the
	gimple stmts.
	* svalue.cc (cmp_cst): New.
	(svalue::cmp_ptr): New.
	(svalue::cmp_ptr_ptr): New.

2020-10-27  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_graph::get_or_create_node): Fix off-by-one
	when imposing param_analyzer_max_enodes_per_program_point limit.

2020-10-27  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::get_representative_path_var):
	Implement case RK_LABEL.
	* region-model.h (label_region::get_label): New accessor.

2020-10-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97514
	* engine.cc (exploded_graph::add_function_entry): Handle failure
	to create an enode, rather than asserting.

2020-10-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97489
	* engine.cc (exploded_graph::add_function_entry): Assert that we
	have a function body.
	(exploded_graph::on_escaped_function): Reject fndecls that don't
	have a function body.

2020-10-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93388
	* region-model.cc (region_model::get_initial_value_for_global):
	Fall back to returning an initial_svalue if
	decl_region::get_svalue_for_initializer fails.
	* region.cc (decl_region::get_svalue_for_initializer): Don't
	attempt to create a compound_svalue if the region has an unknown
	size.

2020-10-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93723
	* store.cc (binding_map::apply_ctor_to_region): Remove redundant
	assertion.

2020-10-12  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97258
	* engine.cc (impl_region_model_context::on_escaped_function): New
	vfunc.
	(exploded_graph::add_function_entry): Use m_functions_with_enodes
	to implement idempotency.
	(add_any_callbacks): New.
	(exploded_graph::build_initial_worklist): Use the above to find
	callbacks that are reachable from global initializers.
	(exploded_graph::on_escaped_function): New.
	* exploded-graph.h
	(impl_region_model_context::on_escaped_function): New decl.
	(exploded_graph::on_escaped_function): New decl.
	(exploded_graph::m_functions_with_enodes): New field.
	* region-model-reachability.cc
	(reachable_regions::reachable_regions): Replace "store" param with
	"model" param; use it to initialize m_model.
	(reachable_regions::add): When getting the svalue for the region,
	call get_store_value on the model rather than using an initial
	value.
	(reachable_regions::mark_escaped_clusters): Add ctxt param and
	use it to call on_escaped_function when a function_region escapes.
	* region-model-reachability.h
	(reachable_regions::reachable_regions): Replace "store" param with
	"model" param.
	(reachable_regions::mark_escaped_clusters): Add ctxt param.
	(reachable_regions::m_model): New field.
	* region-model.cc (region_model::handle_unrecognized_call): Update
	for change in reachable_regions ctor.
	(region_model::handle_unrecognized_call): Pass ctxt to
	mark_escaped_clusters.
	(region_model::get_reachable_svalues): Update for change in
	reachable_regions ctor.
	(region_model::get_initial_value_for_global): Read-only variables
	keep their initial values.
	* region-model.h (region_model_context::on_escaped_function): New
	vfunc.
	(noop_region_model_context::on_escaped_function): New.

2020-10-12  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.opt (Wanalyzer-write-to-const): New.
	(Wanalyzer-write-to-string-literal): New.
	* region-model-impl-calls.cc (region_model::impl_call_memcpy):
	Call check_for_writable_region.
	(region_model::impl_call_memset): Likewise.
	(region_model::impl_call_strcpy): Likewise.
	* region-model.cc (class write_to_const_diagnostic): New.
	(class write_to_string_literal_diagnostic): New.
	(region_model::check_for_writable_region): New.
	(region_model::set_value): Call check_for_writable_region.
	* region-model.h (region_model::check_for_writable_region): New
	decl.

2020-10-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97116
	* sm-malloc.cc (method_p): New.
	(describe_argument_index): New.
	(inform_nonnull_attribute): Use describe_argument_index.
	(possible_null_arg::describe_final_event): Likewise.
	(null_arg::describe_final_event): Likewise.

2020-09-29  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/95188
	* engine.cc (stmt_requires_new_enode_p): Split enodes before
	"signal" calls.

2020-09-29  David Malcolm  <dmalcolm@redhat.com>

	* constraint-manager.cc
	(constraint_manager::add_constraint_internal): Whitespace fixes.
	Silence -Wsign-compare warning.
	* engine.cc (maybe_process_run_of_before_supernode_enodes):
	Silence -Wsign-compare warning.

2020-09-28  David Malcolm  <dmalcolm@redhat.com>

	* region-model.h (binop_svalue::dyn_cast_binop_svalue): Remove
	redundant "virtual".  Add FINAL OVERRIDE.
	(widening_svalue::dyn_cast_widening_svalue): Add FINAL OVERRIDE.
	(compound_svalue::dyn_cast_compound_svalue): Likewise.
	(conjured_svalue::dyn_cast_conjured_svalue): Likewise.

2020-09-28  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (null_assignment_sm_context::m_visitor):
	Remove unused field.

2020-09-28  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97233
	* analyzer.cc (is_longjmp_call_p): Require the initial argument
	to be a pointer.
	* engine.cc (exploded_node::on_longjmp): Likewise.

2020-09-28  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (sm_state_map::print): Update check
	for m_global_state being the start state.

2020-09-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96646
	PR analyzer/96841
	* region-model.cc (region_model::get_representative_path_var):
	When handling offset_region, wrap the MEM_REF's first argument in
	an ADDR_EXPR of pointer type, rather than simply using the tree
	for the parent region.  Require the MEM_REF's second argument to
	be an integer constant.

2020-09-24  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (struct rejected_constraint): New decl.
	* analyzer.opt (fanalyzer-feasibility): New option.
	* diagnostic-manager.cc (path_builder::path_builder): Add
	"problem" param and use it to initialize new field.
	(path_builder::get_feasibility_problem): New accessor.
	(path_builder::m_feasibility_problem): New field.
	(dedupe_winners::add): Remove inversion of logic in "if" clause,
	swapping if/else suites.  In the !feasible_p suite, inspect
	flag_analyzer_feasibility and add code to handle when this
	is off, accepting the infeasible path, but recording the
	feasibility_problem.
	(diagnostic_manager::emit_saved_diagnostic): Pass the
	feasibility_problem to the path_builder.
	(diagnostic_manager::add_events_for_eedge): If we have
	a feasibility_problem at this edge, use it to add a custom event.
	* engine.cc (exploded_path::feasible_p): Pass a
	rejected_constraint ** to model.maybe_update_for_edge and transfer
	ownership of any created instance to any feasibility_problem.
	(feasibility_problem::dump_to_pp): New.
	* exploded-graph.h (feasibility_problem::feasibility_problem):
	Drop "model" param; add rejected_constraint * param.
	(feasibility_problem::~feasibility_problem): New.
	(feasibility_problem::dump_to_pp): New decl.
	(feasibility_problem::m_model): Drop field.
	(feasibility_problem::m_rc): New field.
	* program-point.cc (function_point::get_location): Handle
	PK_BEFORE_SUPERNODE and PK_AFTER_SUPERNODE.
	* program-state.cc (program_state::on_edge): Pass NULL to new
	param of region_model::maybe_update_for_edge.
	* region-model.cc (region_model::add_constraint): New overload
	adding a rejected_constraint ** param.
	(region_model::maybe_update_for_edge): Add rejected_constraint **
	param and pass it to the various apply_constraints_for_ calls.
	(region_model::apply_constraints_for_gcond): Add
	rejected_constraint ** param and pass it to add_constraint calls.
	(region_model::apply_constraints_for_gswitch): Likewise.
	(region_model::apply_constraints_for_exception): Likewise.
	(rejected_constraint::dump_to_pp): New.
	* region-model.h (region_model::maybe_update_for_edge):
	Add rejected_constraint ** param.
	(region_model::add_constraint): New overload adding a
	rejected_constraint ** param.
	(region_model::apply_constraints_for_gcond): Add
	rejected_constraint ** param.
	(region_model::apply_constraints_for_gswitch): Likewise.
	(region_model::apply_constraints_for_exception): Likewise.
	(struct rejected_constraint): New.

2020-09-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97178
	* engine.cc (impl_run_checkers): Update for change to ext_state
	ctor.
	* program-state.cc (selftest::test_sm_state_map): Pass an engine
	instance to ext_state ctor.
	(selftest::test_program_state_1): Likewise.
	(selftest::test_program_state_2): Likewise.
	(selftest::test_program_state_merging): Likewise.
	(selftest::test_program_state_merging_2): Likewise.
	* program-state.h (extrinsic_state::extrinsic_state): Remove NULL
	default value for "eng" param.

2020-09-23  Tobias Burnus  <tobias@codesourcery.com>

	* analyzer-logging.cc: Guard '#pragma ... ignored "-Wformat-diag"'
	by '#if __GNUC__ >= 10'
	* analyzer.h: Likewise.
	* call-string.cc: Likewise.

2020-09-23  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::on_stmt): Replace sequence of dyn_cast
	with switch.

2020-09-22  David Malcolm  <dmalcolm@redhat.com>

	* analysis-plan.cc: Include "json.h".
	* analyzer.opt (fdump-analyzer-json): New.
	* call-string.cc: Include "json.h".
	(call_string::to_json): New.
	* call-string.h (call_string::to_json): New decl.
	* checker-path.cc: Include "json.h".
	* constraint-manager.cc: Include "json.h".
	(equiv_class::to_json): New.
	(constraint::to_json): New.
	(constraint_manager::to_json): New.
	* constraint-manager.h (equiv_class::to_json): New decl.
	(constraint::to_json): New decl.
	(constraint_manager::to_json): New decl.
	* diagnostic-manager.cc: Include "json.h".
	(saved_diagnostic::to_json): New.
	(diagnostic_manager::to_json): New.
	* diagnostic-manager.h (saved_diagnostic::to_json): New decl.
	(diagnostic_manager::to_json): New decl.
	* engine.cc: Include "json.h", <zlib.h>.
	(exploded_node::status_to_str): New.
	(exploded_node::to_json): New.
	(exploded_edge::to_json): New.
	(exploded_graph::to_json): New.
	(dump_analyzer_json): New.
	(impl_run_checkers): Call it.
	* exploded-graph.h (exploded_node::status_to_str): New decl.
	(exploded_node::to_json): New.
	(exploded_edge::to_json): New.
	(exploded_graph::to_json): New.
	* pending-diagnostic.cc: Include "json.h".
	* program-point.cc: Include "json.h".
	(program_point::to_json): New.
	* program-point.h (program_point::to_json): New decl.
	* program-state.cc: Include "json.h".
	(extrinsic_state::to_json): New.
	(sm_state_map::to_json): New.
	(program_state::to_json): New.
	* program-state.h (extrinsic_state::to_json): New decl.
	(sm_state_map::to_json): New decl.
	(program_state::to_json): New decl.
	* region-model-impl-calls.cc: Include "json.h".
	* region-model-manager.cc: Include "json.h".
	* region-model-reachability.cc: Include "json.h".
	* region-model.cc: Include "json.h".
	* region-model.h (svalue::to_json): New decl.
	(region::to_json): New decl.
	* region.cc: Include "json.h".
	(region::to_json: New.
	* sm-file.cc: Include "json.h".
	* sm-malloc.cc: Include "json.h".
	* sm-pattern-test.cc: Include "json.h".
	* sm-sensitive.cc: Include "json.h".
	* sm-signal.cc: Include "json.h".
	(signal_delivery_edge_info_t::to_json): New.
	* sm-taint.cc: Include "json.h".
	* sm.cc: Include "diagnostic.h", "tree-diagnostic.h", and
	"json.h".
	(state_machine::state::to_json): New.
	(state_machine::to_json): New.
	* sm.h (state_machine::state::to_json): New.
	(state_machine::to_json): New.
	* state-purge.cc: Include "json.h".
	* store.cc: Include "json.h".
	(binding_key::get_desc): New.
	(binding_map::to_json): New.
	(binding_cluster::to_json): New.
	(store::to_json): New.
	* store.h (binding_key::get_desc): New decl.
	(binding_map::to_json): New decl.
	(binding_cluster::to_json): New decl.
	(store::to_json): New decl.
	* supergraph.cc: Include "json.h".
	(supergraph::to_json): New.
	(supernode::to_json): New.
	(superedge::to_json): New.
	* supergraph.h (supergraph::to_json): New decl.
	(supernode::to_json): New decl.
	(superedge::to_json): New decl.
	* svalue.cc: Include "json.h".
	(svalue::to_json): New.

2020-09-21  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97130
	* region-model-impl-calls.cc (call_details::get_arg_type): New.
	* region-model.cc (region_model::on_call_pre): Check that the
	initial arg is a pointer before calling impl_call_memset and
	impl_call_strlen.
	* region-model.h (call_details::get_arg_type): New decl.

2020-09-21  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93355
	* sm-malloc.cc (malloc_state_machine::get_default_state): Look at
	the base region when considering pointers.  Treat pointers to
	decls as being non-heap.

2020-09-18  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (warning_event::get_desc): Handle global state
	changes.

2020-09-18  David Malcolm  <dmalcolm@redhat.com>

	* sm-malloc.cc (malloc_state_machine::on_stmt): Handle strdup and
	strndup as being malloc-like allocators.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (strongly_connected_components::strong_connect): Only
	consider intraprocedural edges when creating SCCs.
	(worklist::key_t::cmp): Add comment.  Treat call_string
	differences as more important than differences of program_point
	within a supernode.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (supernode_cluster::dump_dot): Show the SCC id
	in the per-supernode clusters in FILENAME.eg.dot output.
	(exploded_graph_annotator::add_node_annotations):
	Show the SCC of the supernode in FILENAME.supernode.eg.dot output.
	* exploded-graph.h (worklist::scc_id): New.
	(exploded_graph::get_scc_id): New.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::dump_dot): Show STATUS_BULK_MERGED.
	(exploded_graph::process_worklist): Call
	maybe_process_run_of_before_supernode_enodes.
	(exploded_graph::maybe_process_run_of_before_supernode_enodes):
	New.
	(exploded_graph_annotator::print_enode): Show STATUS_BULK_MERGED.
	* exploded-graph.h (enum exploded_node::status): Add
	STATUS_BULK_MERGED.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc
	(exploded_graph::process_node) <case PK_BEFORE_SUPERNODE>:
	Simplify by using program_point::get_next.
	* program-point.cc (program_point::get_next): New.
	* program-point.h (program_point::get_next): New decl.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_graph::get_or_create_node): Show the
	program point when issuing -Wanalyzer-too-complex due to hitting
	the per-program-point limit.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::on_call_pre): Treat getchar as
	having no side-effects.

2020-09-15  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96650
	* constraint-manager.cc (merger_fact_visitor::on_fact): Replace
	assertion that add_constraint succeeded with an assertion that
	if it fails, -fanalyzer-transitivity is off.

2020-09-14  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.opt (-param=analyzer-max-constraints=): New param.
	* constraint-manager.cc
	(constraint_manager::add_constraint_internal): Silently reject
	attempts to add constraints when the above limit is reached.

2020-09-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96653
	* constraint-manager.cc
	(constraint_manager::get_or_add_equiv_class): Don't accumulate
	transitive closure of all constraints on constants.

2020-09-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97029
	* analyzer.cc (is_setjmp_call_p): Require the initial arg to be a
	pointer.
	* region-model.cc (region_model::deref_rvalue): Assert that the
	svalue is of pointer type.

2020-09-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96798
	* region-model-impl-calls.cc (region_model::impl_call_memcpy):
	New.
	(region_model::impl_call_strcpy): New.
	* region-model.cc (region_model::on_call_pre): Flag unhandled
	builtins that are non-pure as having unknown side-effects.
	Implement BUILT_IN_MEMCPY, BUILT_IN_MEMCPY_CHK, BUILT_IN_STRCPY,
	BUILT_IN_STRCPY_CHK, BUILT_IN_FPRINTF, BUILT_IN_FPRINTF_UNLOCKED,
	BUILT_IN_PUTC, BUILT_IN_PUTC_UNLOCKED, BUILT_IN_FPUTC,
	BUILT_IN_FPUTC_UNLOCKED, BUILT_IN_FPUTS, BUILT_IN_FPUTS_UNLOCKED,
	BUILT_IN_FWRITE, BUILT_IN_FWRITE_UNLOCKED, BUILT_IN_PRINTF,
	BUILT_IN_PRINTF_UNLOCKED, BUILT_IN_PUTCHAR,
	BUILT_IN_PUTCHAR_UNLOCKED, BUILT_IN_PUTS, BUILT_IN_PUTS_UNLOCKED,
	BUILT_IN_VFPRINTF, BUILT_IN_VPRINTF.
	* region-model.h (region_model::impl_call_memcpy): New decl.
	(region_model::impl_call_strcpy): New decl.

2020-09-09  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94355
	* analyzer.opt (Wanalyzer-mismatching-deallocation): New warning.
	* region-model-impl-calls.cc
	(region_model::impl_call_operator_new): New.
	(region_model::impl_call_operator_delete): New.
	* region-model.cc (region_model::on_call_pre): Detect operator new
	and operator delete.
	(region_model::on_call_post): Likewise.
	(region_model::maybe_update_for_edge): Detect EH edges and call...
	(region_model::apply_constraints_for_exception): New function.
	* region-model.h (region_model::impl_call_operator_new): New decl.
	(region_model::impl_call_operator_delete): New decl.
	(region_model::apply_constraints_for_exception): New decl.
	* sm-malloc.cc (enum resource_state): New.
	(struct allocation_state): New state subclass.
	(enum wording): New.
	(struct api): New.
	(malloc_state_machine::custom_data_t): New typedef.
	(malloc_state_machine::add_state): New decl.
	(malloc_state_machine::m_unchecked)
	(malloc_state_machine::m_nonnull)
	(malloc_state_machine::m_freed): Delete these states in favor
	of...
	(malloc_state_machine::m_malloc)
	(malloc_state_machine::m_scalar_new)
	(malloc_state_machine::m_vector_new): ...this new api instances,
	which own their own versions of these states.
	(malloc_state_machine::on_allocator_call): New decl.
	(malloc_state_machine::on_deallocator_call): New decl.
	(api::api): New ctor.
	(dyn_cast_allocation_state): New.
	(as_a_allocation_state): New.
	(get_rs): New.
	(unchecked_p): New.
	(nonnull_p): New.
	(freed_p): New.
	(malloc_diagnostic::describe_state_change): Use unchecked_p and
	nonnull_p.
	(class mismatching_deallocation): New.
	(double_free::double_free): Add funcname param for initializing
	m_funcname.
	(double_free::emit): Use m_funcname in warning message rather
	than hardcoding "free".
	(double_free::describe_state_change): Likewise.  Use freed_p.
	(double_free::describe_call_with_state): Use freed_p.
	(double_free::describe_final_event): Use m_funcname in message
	rather than hardcoding "free".
	(double_free::m_funcname): New field.
	(possible_null::describe_state_change): Use unchecked_p.
	(possible_null::describe_return_of_state): Likewise.
	(use_after_free::use_after_free): Add param for initializing m_api.
	(use_after_free::emit): Use m_api->m_dealloc_funcname in message
	rather than hardcoding "free".
	(use_after_free::describe_state_change): Use freed_p.  Change the
	wording of the message based on the API.
	(use_after_free::describe_final_event): Use
	m_api->m_dealloc_funcname in message rather than hardcoding
	"free".  Change the wording of the message based on the API.
	(use_after_free::m_api): New field.
	(malloc_leak::describe_state_change): Use unchecked_p.  Update
	for renaming of m_malloc_event to m_alloc_event.
	(malloc_leak::describe_final_event): Update for renaming of
	m_malloc_event to m_alloc_event.
	(malloc_leak::m_malloc_event): Rename...
	(malloc_leak::m_alloc_event): ...to this.
	(free_of_non_heap::free_of_non_heap): Add param for initializing
	m_funcname.
	(free_of_non_heap::emit): Use m_funcname in message rather than
	hardcoding "free".
	(free_of_non_heap::describe_final_event): Likewise.
	(free_of_non_heap::m_funcname): New field.
	(allocation_state::dump_to_pp): New.
	(allocation_state::get_nonnull): New.
	(malloc_state_machine::malloc_state_machine): Update for changes
	to state fields and new api fields.
	(malloc_state_machine::add_state): New.
	(malloc_state_machine::on_stmt): Move malloc/calloc handling to
	on_allocator_call and call it, passing in the API pointer.
	Likewise for free, moving it to on_deallocator_call.  Handle calls
	to operator new and delete in an analogous way.  Use unchecked_p
	when testing for possibly-null-arg and possibly-null-deref, and
	transition to the non-null for the correct API.  Remove redundant
	node param from call to on_zero_assignment.  Use freed_p for
	use-after-free check, and pass in API.
	(malloc_state_machine::on_allocator_call): New, based on code in
	on_stmt.
	(malloc_state_machine::on_deallocator_call): Likewise.
	(malloc_state_machine::on_phi): Mark node param with
	ATTRIBUTE_UNUSED; don't pass it to on_zero_assignment.
	(malloc_state_machine::on_condition): Mark node param with
	ATTRIBUTE_UNUSED.  Replace on_transition calls with get_state and
	set_next_state pairs, transitioning to the non-null state for the
	appropriate API.
	(malloc_state_machine::can_purge_p): Port to new state approach.
	(malloc_state_machine::on_zero_assignment): Replace on_transition
	calls with get_state and set_next_state pairs.  Drop redundant
	node param.
	* sm.h (state_machine::add_custom_state): New.

2020-09-09  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc
	(null_assignment_sm_context::warn_for_state): Replace with...
	(null_assignment_sm_context::warn): ...this.
	* engine.cc (impl_sm_context::warn_for_state): Replace with...
	(impl_sm_context::warn): ...this.
	* sm-file.cc (fileptr_state_machine::on_stmt): Replace
	warn_for_state and on_transition calls with a get_state
	test guarding warn and set_next_state calls.
	* sm-malloc.cc (malloc_state_machine::on_stmt): Likewise.
	* sm-pattern-test.cc (pattern_test_state_machine::on_condition):
	Replace warn_for_state call with warn call.
	* sm-sensitive.cc
	(sensitive_state_machine::warn_for_any_exposure): Replace
	warn_for_state call with a get_state test guarding a warn call.
	* sm-signal.cc (signal_state_machine::on_stmt): Likewise.
	* sm-taint.cc (taint_state_machine::on_stmt):  Replace
	warn_for_state and on_transition calls with a get_state
	test guarding warn and set_next_state calls.
	* sm.h (sm_context::warn_for_state): Replace with...
	(sm_context::warn): ...this.

2020-09-09  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc
	(null_assignment_sm_context::null_assignment_sm_context): Add old_state
	and ext_state params, initializing m_old_state and m_ext_state.
	(null_assignment_sm_context::on_transition): Split into...
	(null_assignment_sm_context::get_state): ...this new vfunc
	implementation and...
	(null_assignment_sm_context::set_next_state): ...this new vfunc
	implementation.
	(null_assignment_sm_context::m_old_state): New field.
	(null_assignment_sm_context::m_ext_state): New field.
	(diagnostic_manager::add_events_for_eedge): Pass in old state and
	ext_state when creating sm_ctxt.
	* engine.cc (impl_sm_context::on_transition): Split into...
	(impl_sm_context::get_state): ...this new vfunc
	implementation and...
	(impl_sm_context::set_next_state): ...this new vfunc
	implementation.
	* sm.h (sm_context::get_state): New pure virtual function.
	(sm_context::set_next_state): Likewise.
	(sm_context::on_transition): Convert from a pure virtual function
	to a regular function implemented in terms of get_state and
	set_next_state.

2020-09-09  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (state_change_event::get_desc): Update
	state_machine::get_state_name calls to state::get_name.
	(warning_event::get_desc): Likewise.
	* diagnostic-manager.cc
	(null_assignment_sm_context::on_transition): Update comparison
	against 0 with comparison with m_sm.get_start_state.
	(diagnostic_manager::prune_for_sm_diagnostic): Update
	state_machine::get_state_name calls to state::get_name.
	* engine.cc (impl_sm_context::on_transition): Likewise.
	(exploded_node::get_dot_fillcolor): Use get_id when summing
	the sm states.
	* program-state.cc (sm_state_map::sm_state_map): Don't hardcode
	0 as the start state when initializing m_global_state.
	(sm_state_map::print): Use dump_to_pp rather than get_state_name
	when dumping states.
	(sm_state_map::is_empty_p): Don't hardcode 0 as the start state
	when examining m_global_state.
	(sm_state_map::hash): Use get_id when hashing states.
	(selftest::test_sm_state_map): Use state objects rather than
	arbitrary hardcoded integers.
	(selftest::test_program_state_merging): Likewise.
	(selftest::test_program_state_merging_2): Likewise.
	* sm-file.cc (fileptr_state_machine::m_start): Move to base class.
	(file_diagnostic::describe_state_change): Use get_start_state.
	(fileptr_state_machine::fileptr_state_machine): Drop m_start
	initialization.
	* sm-malloc.cc (malloc_state_machine::m_start): Move to base
	class.
	(malloc_diagnostic::describe_state_change): Use get_start_state.
	(possible_null::describe_state_change): Likewise.
	(malloc_state_machine::malloc_state_machine): Drop m_start
	initialization.
	* sm-pattern-test.cc (pattern_test_state_machine::m_start): Move
	to base class.
	(pattern_test_state_machine::pattern_test_state_machine): Drop
	m_start initialization.
	* sm-sensitive.cc (sensitive_state_machine::m_start): Move to base
	class.
	(sensitive_state_machine::sensitive_state_machine): Drop m_start
	initialization.
	* sm-signal.cc (signal_state_machine::m_start): Move to base
	class.
	(signal_state_machine::signal_state_machine): Drop m_start
	initialization.
	* sm-taint.cc (taint_state_machine::m_start): Move to base class.
	(taint_state_machine::taint_state_machine): Drop m_start
	initialization.
	* sm.cc (state_machine::state::dump_to_pp): New.
	(state_machine::state_machine): Move here from sm.h.  Initialize
	m_next_state_id and m_start.
	(state_machine::add_state): Reimplement in terms of state objects.
	(state_machine::get_state_name): Delete.
	(state_machine::get_state_by_name): Reimplement in terms of state
	objects.  Make const.
	(state_machine::validate): Delete.
	(state_machine::dump_to_pp): Reimplement in terms of state
	objects.
	* sm.h (state_machine::state): New class.
	(state_machine::state_t): Convert typedef from "unsigned" to
	"const state_machine::state *".
	(state_machine::state_machine): Move to sm.cc.
	(state_machine::get_default_state): Use m_start rather than
	hardcoding 0.
	(state_machine::get_state_name): Delete.
	(state_machine::get_state_by_name): Make const.
	(state_machine::get_start_state): New accessor.
	(state_machine::alloc_state_id): New.
	(state_machine::m_state_names): Drop in favor of...
	(state_machine::m_states): New field
	(state_machine::m_start): New field
	(start_start_p): Delete.

2020-09-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96949
	* store.cc (binding_map::apply_ctor_val_to_range): Add
	error-handling for the cases where we have symbolic offsets.

2020-09-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96950
	* store.cc (binding_map::apply_ctor_to_region): Handle RANGE_EXPR
	where min_index == max_index.
	(binding_map::apply_ctor_val_to_range): Replace assertion that we
	don't have a CONSTRUCTOR value with error-handling.

2020-09-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96962
	* region-model.cc (region_model::on_call_pre): Fix guard on switch
	on built-ins to only consider BUILT_IN_NORMAL, rather than other
	kinds of build-ins.

2020-09-01  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96792
	* region-model.cc (region_model::deref_rvalue): Add the constraint
	that PTR_SVAL is non-NULL.

2020-08-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96798
	* region-model.cc (region_model::on_call_pre): Handle
	BUILT_IN_MEMSET_CHK.

2020-08-31  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::on_call_pre): Gather handling of
	builtins and of internal fns into switch statements.  Handle
	"alloca" and BUILT_IN_ALLOCA_WITH_ALIGN.

2020-08-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96860
	* region.cc (decl_region::get_svalue_for_constructor): Support
	apply_ctor_to_region failing.
	* store.cc (binding_map::apply_ctor_to_region): Add failure
	handling.
	(binding_map::apply_ctor_val_to_range): Likewise.
	(binding_map::apply_ctor_pair_to_child_region): Likewise.  Replace
	assertion that child_base_offset is not symbolic with error
	handling.
	* store.h (binding_map::apply_ctor_to_region): Convert return type
	from void to bool.
	(binding_map::apply_ctor_val_to_range): Likewise.
	(binding_map::apply_ctor_pair_to_child_region): Likewise.

2020-08-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96763
	* store.cc (binding_map::apply_ctor_to_region): Handle RANGE_EXPR
	by calling a new binding_map::apply_ctor_val_to_range subroutine.
	Split out the existing non-CONSTRUCTOR-handling code to a new
	apply_ctor_pair_to_child_region subroutine.
	(binding_map::apply_ctor_val_to_range): New.
	(binding_map::apply_ctor_pair_to_child_region): New, split out
	from binding_map::apply_ctor_to_region as noted above.
	* store.h (binding_map::apply_ctor_val_to_range): New decl.
	(binding_map::apply_ctor_pair_to_child_region): New decl.

2020-08-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96764
	* region-model-manager.cc
	(region_model_manager::maybe_fold_unaryop): Handle VIEW_CONVERT_EXPR.
	(region_model_manager::get_or_create_cast): Move logic for
	real->integer casting to...
	(get_code_for_cast): ...this new function, and add logic for
	real->non-integer casts.
	(region_model_manager::maybe_fold_sub_svalue): Handle
	VIEW_CONVERT_EXPR.
	* region-model.cc
	(region_model::add_any_constraints_from_gassign): Likewise.
	* svalue.cc (svalue::maybe_undo_cast): Likewise.
	(unaryop_svalue::dump_to_pp): Likewise.

2020-08-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94858
	* region-model-manager.cc
	(region_model_manager::get_or_create_widening_svalue): Assert that
	neither of the inputs are themselves widenings.
	* store.cc (store::eval_alias_1): The initial value of a pointer
	can't point to a region that was allocated on the heap after the
	beginning of the path.  A widened pointer value can't alias anything
	that the initial pointer value can't alias.
	* svalue.cc (svalue::can_merge_p): Merge BINOP (X, OP, CST) with X
	to a widening svalue.  Merge
	BINOP(WIDENING(BASE, BINOP(BASE, X)), X) and BINOP(BASE, X) to
	to the LHS of the first BINOP.

2020-08-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96777
	* region-model.h (class compound_svalue): Document that all keys
	must be concrete.
	(compound_svalue::compound_svalue): Move definition to svalue.cc.
	* store.cc (binding_map::apply_ctor_to_region): Handle
	initializers for trailing arrays with incomplete size.
	* svalue.cc (compound_svalue::compound_svalue): Move definition
	here from region-model.h.  Add assertion that all keys are
	concrete.

2020-08-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94851
	* region-model-manager.cc
	(region_model_manager::maybe_fold_binop): Fold bitwise "& 0" to 0.

2020-08-22  David Malcolm  <dmalcolm@redhat.com>

	* store.cc (store::eval_alias): Make const.  Split out 2nd half
	into store::eval_alias_1 and call it twice for symmetry, avoiding
	test duplication.
	(store::eval_alias_1): New function, split out from the above.
	* store.h (store::eval_alias): Make const.
	(store::eval_alias_1): New decl.

2020-08-22  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::push_frame): Bind the default
	SSA name for each parm if it exists, falling back to the parm
	itself otherwise, rather than doing both.

2020-08-20  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96723
	* region-model-manager.cc
	(region_model_manager::get_field_region): Assert that field is a
	FIELD_DECL.
	* region.cc (region::get_subregions_for_binding): In
	union-handling, filter the TYPE_FIELDS traversal to just FIELD_DECLs.

2020-08-20  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96713
	* region-model.cc (region_model::get_gassign_result): For
	comparisons, only use eval_condition when the lhs has boolean
	type, and use get_or_create_constant_svalue on the boolean
	constants directly rather than via get_rvalue.

2020-08-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96643
	* region-model.cc (region_model::deref_rvalue): Rather than
	attempting to handle all svalue kinds in the switch, only cover
	the special cases, and move symbolic-region handling to after
	the switch, thus implicitly handling the missing case SK_COMPOUND.

2020-08-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96705
	* region-model-manager.cc
	(region_model_manager::maybe_fold_binop): Check that we have an
	integral type before calling build_int_cst.

2020-08-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96699
	* region-model-manager.cc
	(region_model_manager::get_or_create_cast): Use FIX_TRUNC_EXPR for
	casting from REAL_TYPE to INTEGER_TYPE.

2020-08-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96651
	* region-model.cc (region_model::called_from_main_p): New.
	(region_model::get_store_value): Move handling for globals into...
	(region_model::get_initial_value_for_global): ...this new
	function, and add logic for extracting values from decl
	initializers.
	* region-model.h (decl_region::get_svalue_for_constructor): New
	decl.
	(decl_region::get_svalue_for_initializer): New decl.
	(region_model::called_from_main_p): New decl.
	(region_model::get_initial_value_for_global): New.
	* region.cc (decl_region::maybe_get_constant_value): Move logic
	for getting an svalue from a CONSTRUCTOR node to...
	(decl_region::get_svalue_for_constructor): ...this new function.
	(decl_region::get_svalue_for_initializer): New.
	* store.cc (get_svalue_for_ctor_val): Rewrite in terms of
	region_model::get_rvalue.
	* store.h (binding_cluster::get_map): New accessor.

2020-08-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96648
	* region.cc (get_field_at_bit_offset): Gracefully handle negative
	values for bit_offset.

2020-08-18  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::get_rvalue_1): Fix name of local.

2020-08-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96641
	* region-model.cc (region_model::get_rvalue_1): Handle
	unrecognized tree codes by returning "UNKNOWN.

2020-08-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96640
	* region-model.cc (region_model::get_gassign_result): Handle various
	VEC_* tree codes by returning UNKNOWN.
	(region_model::on_assignment): Handle unrecognized tree codes by
	setting lhs to an unknown value, rather than issuing a "sorry" and
	asserting.

2020-08-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96644
	* region-model-manager.cc (get_region_for_unexpected_tree_code):
	Handle ctxt being NULL.

2020-08-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96639
	* region.cc (region::get_subregions_for_binding): Check for "type"
	being NULL.

2020-08-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96642
	* store.cc (get_svalue_for_ctor_val): New.
	(binding_map::apply_ctor_to_region): Call it.

2020-08-14  David Malcolm  <dmalcolm@redhat.com>

	PR testsuite/96609
	PR analyzer/96616
	* region-model.cc (region_model::get_store_value): Call
	maybe_get_constant_value on decl_regions first.
	* region-model.h (decl_region::maybe_get_constant_value): New decl.
	* region.cc (decl_region::get_stack_depth): Likewise.
	(decl_region::maybe_get_constant_value): New.
	* store.cc (get_subregion_within_ctor): New.
	(binding_map::apply_ctor_to_region): New.
	* store.h (binding_map::apply_ctor_to_region): New decl.

2020-08-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96611
	* store.cc (store::mark_as_escaped): Reject attempts to
	get a cluster for an unknown pointer.

2020-08-13  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93032
	PR analyzer/93938
	PR analyzer/94011
	PR analyzer/94099
	PR analyzer/94399
	PR analyzer/94458
	PR analyzer/94503
	PR analyzer/94640
	PR analyzer/94688
	PR analyzer/94689
	PR analyzer/94839
	PR analyzer/95026
	PR analyzer/95042
	PR analyzer/95240
	* analyzer-logging.cc: Ignore "-Wformat-diag".
	(logger::enter_scope): Use inc_indent in both overloads.
	(logger::exit_scope): Use dec_indent.
	* analyzer-logging.h (logger::inc_indent): New.
	(logger::dec_indent): New.
	* analyzer-selftests.cc (run_analyzer_selftests): Call
	analyzer_store_cc_tests.
	* analyzer-selftests.h (analyzer_store_cc_tests): New decl.
	* analyzer.cc (get_stmt_location): New function.
	* analyzer.h (class initial_svalue): New forward decl.
	(class unaryop_svalue): New forward decl.
	(class binop_svalue): New forward decl.
	(class sub_svalue): New forward decl.
	(class unmergeable_svalue): New forward decl.
	(class placeholder_svalue): New forward decl.
	(class widening_svalue): New forward decl.
	(class compound_svalue): New forward decl.
	(class conjured_svalue): New forward decl.
	(svalue_set): New typedef.
	(class map_region): Delete.
	(class array_region): Delete.
	(class frame_region): New forward decl.
	(class function_region): New forward decl.
	(class label_region): New forward decl.
	(class decl_region): New forward decl.
	(class element_region): New forward decl.
	(class offset_region): New forward decl.
	(class cast_region): New forward decl.
	(class field_region): New forward decl.
	(class string_region): New forward decl.
	(class region_model_manager): New forward decl.
	(class store_manager): New forward decl.
	(class store): New forward decl.
	(class call_details): New forward decl.
	(struct svalue_id_merger_mapping): Delete.
	(struct canonicalization): Delete.
	(class function_point): New forward decl.
	(class engine): New forward decl.
	(dump_tree): New function decl.
	(print_quoted_type): New function decl.
	(readability_comparator): New function decl.
	(tree_cmp): New function decl.
	(class path_var): Move here from region-model.h
	(bit_offset_t, bit_size_t, byte_size_t): New typedefs.
	(class region_offset): New class.
	(get_stmt_location): New decl.
	(struct member_function_hash_traits): New struct.
	(class consolidation_map): New class.
	Ignore "-Wformat-diag".
	* analyzer.opt (-param=analyzer-max-svalue-depth=): New param.
	(-param=analyzer-max-enodes-for-full-dump=): New param.
	* call-string.cc: Ignore -Wformat-diag.
	* checker-path.cc: Move includes of "analyzer/call-string.h" and
	"analyzer/program-point.h" to before "analyzer/region-model.h",
	and also include "analyzer/store.h" before it.
	(state_change_event::state_change_event): Replace "tree var" param
	with "const svalue *sval".  Convert "origin" param from tree to
	"const svalue *".
	(state_change_event::get_desc): Call get_representative_tree to
	convert the var and origin from const svalue * to tree.  Use
	svalue::get_desc rather than %qE when describing state changes.
	(checker_path::add_final_event): Use get_stmt_location.
	* checker-path.h (state_change_event::state_change_event): Port
	from tree to const svalue *.
	(state_change_event::get_lvalue): Delete.
	(state_change_event::get_dest_function): New.
	(state_change_event::m_var): Replace with...
	(state_change_event::m_sval): ...this.
	(state_change_event::m_origin): Convert from tree to
	const svalue *.
	* constraint-manager.cc: Include "analyzer/call-string.h",
	"analyzer/program-point.h", and "analyzer/store.h" before
	"analyzer/region-model.h".
	(struct bound, struct range): Move to constraint-manager.h.
	(compare_constants): New function.
	(range::dump): Rename to...
	(range::dump_to_pp): ...this.  Support NULL constants.
	(range::dump): Reintroduce for dumping to stderr.
	(range::constrained_to_single_element): Return result, rather than
	writing to *OUT.
	(range::eval_condition): New.
	(range::below_lower_bound): New.
	(range::above_upper_bound): New.
	(equiv_class::equiv_class): Port from svalue_id to const svalue *.
	(equiv_class::print): Likewise.
	(equiv_class::hash): Likewise.
	(equiv_class::operator==): Port from svalue_id to const svalue *.
	(equiv_class::add): Port from svalue_id to const svalue *. Drop
	"cm" param.
	(equiv_class::del): Port from svalue_id to const svalue *.
	(equiv_class::get_representative): Likewise.
	(equiv_class::remap_svalue_ids): Delete.
	(svalue_id_cmp_by_id): Rename to...
	(svalue_cmp_by_ptr): ...this, porting from svalue_id to
	const svalue *.
	(equiv_class::canonicalize): Update qsort comparator.
	(constraint::implied_by): New.
	(constraint_manager::constraint_manager): Copy m_mgr in copy ctor.
	(constraint_manager::dump_to_pp): Add "multiline" param
	(constraint_manager::dump): Pass "true" for "multiline".
	(constraint_manager::add_constraint): Port from svalue_id to
	const svalue *.  Split out second part into...
	(constraint_manager::add_unknown_constraint): ...this new
	function.  Remove self-constraints when merging equivalence
	classes.
	(constraint_manager::add_constraint_internal): Remove constraints
	that would be implied by the new constraint.  Port from svalue_id
	to const svalue *.
	(constraint_manager::get_equiv_class_by_sid): Rename to...
	(constraint_manager::get_equiv_class_by_svalue): ...this, porting
	from svalue_id to const svalue *.
	(constraint_manager::get_or_add_equiv_class): Port from svalue_id
	to const svalue *.
	(constraint_manager::eval_condition): Make const.  Call
	compare_constants and return early if it provides a known result.
	(constraint_manager::get_ec_bounds): New.
	(constraint_manager::eval_condition): New overloads.  Make
	existing one const, and use compare_constants.
	(constraint_manager::purge): Convert "p" param to a template
	rather that an abstract base class.  Port from svalue_id to
	const svalue *.
	(class dead_svalue_purger): New class.
	(constraint_manager::remap_svalue_ids): Delete.
	(constraint_manager::on_liveness_change): New.
	(equiv_class_cmp): Port from svalue_id to const svalue *.
	(constraint_manager::canonicalize): Likewise.  Combine with
	purging of redundant equivalence classes and constraints.
	(class cleaned_constraint_manager): Delete.
	(class merger_fact_visitor): Make "m_cm_b" const.  Add "m_merger"
	field.
	(merger_fact_visitor::fact): Port from svalue_id to const svalue *.
	Add special case for widening.
	(constraint_manager::merge): Port from svalue_id to const svalue *.
	(constraint_manager::clean_merger_input): Delete.
	(constraint_manager::for_each_fact): Port from svalue_id to
	const svalue *.
	(constraint_manager::validate): Likewise.
	(selftest::test_constraint_conditions): Provide a
	region_model_manager when creating region_model instances.
	Add test for self-equality not creating equivalence classes.
	(selftest::test_transitivity): Provide a region_model_manager when
	creating region_model instances.  Verify that EC-merging happens
	when constraints are implied.
	(selftest::test_constant_comparisons):  Provide a
	region_model_manager when creating region_model instances.
	(selftest::test_constraint_impl): Likewise.  Remove over-specified
	assertions.
	(selftest::test_equality): Provide a region_model_manager when
	creating region_model instances.
	(selftest::test_many_constants): Likewise.  Provide a
	program_point when testing merging.
	(selftest::run_constraint_manager_tests): Move call to
	test_constant_comparisons to outside the transitivity guard.
	* constraint-manager.h (struct bound): Move here from
	constraint-manager.cc.
	(struct range): Likewise.
	(struct::eval_condition): New decl.
	(struct::below_lower_bound): New decl.
	(struct::above_upper_bound): New decl.
	(equiv_class::add): Port from svalue_id to const svalue *.
	(equiv_class::del): Likewise.
	(equiv_class::get_representative): Likewise.
	(equiv_class::remap_svalue_ids): Drop.
	(equiv_class::m_cst_sid): Convert to..
	(equiv_class::m_cst_sval): ...this.
	(equiv_class::m_vars): Port from svalue_id to const svalue *.
	(constraint::bool implied_by): New decl.
	(fact_visitor::on_fact): Port from svalue_id to const svalue *.
	(constraint_manager::constraint_manager): Add mgr param.
	(constraint_manager::clone): Delete.
	(constraint_manager::maybe_get_constant): Delete.
	(constraint_manager::get_sid_for_constant): Delete.
	(constraint_manager::get_num_svalues): Delete.
	(constraint_manager::dump_to_pp): Add "multiline" param.
	(constraint_manager::get_equiv_class): Port from svalue_id to
	const svalue *.
	(constraint_manager::add_constraint):  Likewise.
	(constraint_manager::get_equiv_class_by_sid): Rename to...
	(constraint_manager::get_equiv_class_by_svalue): ...this, porting
	from svalue_id to const svalue *.
	(constraint_manager::add_unknown_constraint): New decl.
	(constraint_manager::get_or_add_equiv_class): Port from svalue_id
	to const svalue *.
	(constraint_manager::eval_condition): Likewise.  Add overloads.
	(constraint_manager::get_ec_bounds): New decl.
	(constraint_manager::purge): Convert to template.
	(constraint_manager::remap_svalue_ids): Delete.
	(constraint_manager::on_liveness_change): New decl.
	(constraint_manager::canonicalize): Drop param.
	(constraint_manager::clean_merger_input): Delete.
	(constraint_manager::m_mgr): New field.
	* diagnostic-manager.cc: Move includes of
	"analyzer/call-string.h" and "analyzer/program-point.h" to before
	"analyzer/region-model.h", and also include "analyzer/store.h"
	before it.
	(saved_diagnostic::saved_diagnostic): Add "sval" param.
	(diagnostic_manager::diagnostic_manager): Add engine param.
	(diagnostic_manager::add_diagnostic): Add "sval" param, passing it
	to saved_diagnostic ctor.  Update overload to pass NULL for it.
	(dedupe_winners::dedupe_winners): Add engine param.
	(dedupe_winners::add): Add "eg" param.  Pass m_engine to
	feasible_p.
	(dedupe_winner::m_engine): New field.
	(diagnostic_manager::emit_saved_diagnostics): Pass engine to
	dedupe_winners.  Pass &eg when adding candidates.  Pass svalue
	rather than tree to prune_path.  Use get_stmt_location to get
	primary location of diagnostic.
	(diagnostic_manager::emit_saved_diagnostic): Likewise.
	(get_any_origin): Drop.
	(state_change_event_creator::on_global_state_change): Pass NULL
	const svalue * rather than NULL_TREE trees to state_change_event
	ctor.
	(state_change_event_creator::on_state_change): Port from tree and
	svalue_id to const svalue *.
	(for_each_state_change): Port from svalue_id to const svalue *.
	(struct null_assignment_sm_context): New.
	(diagnostic_manager::add_events_for_eedge):  Add state change
	events for assignment to NULL.
	(diagnostic_manager::prune_path): Update param from tree to
	const svalue *.
	(diagnostic_manager::prune_for_sm_diagnostic): Port from tracking
	by tree to by const svalue *.
	* diagnostic-manager.h (saved_diagnostic::saved_diagnostic): Add sval
	param.
	(saved_diagnostic::m_sval): New field.
	(diagnostic_manager::diagnostic_manager): Add engine param.
	(diagnostic_manager::get_engine): New.
	(diagnostic_manager::add_diagnostic): Add "sval" param.
	(diagnostic_manager::prune_path): Likewise.
	(diagnostic_manager::prune_for_sm_diagnostic): New overload.
	(diagnostic_manager::m_eng): New field.
	* engine.cc: Move includes of "analyzer/call-string.h" and
	"analyzer/program-point.h" to before "analyzer/region-model.h",
	and also include "analyzer/store.h" before it.
	(impl_region_model_context::impl_region_model_context): Update for
	removal of m_change field.
	(impl_region_model_context::remap_svalue_ids): Delete.
	(impl_region_model_context::on_svalue_leak): New.
	(impl_region_model_context::on_svalue_purge): Delete.
	(impl_region_model_context::on_liveness_change): New.
	(impl_region_model_context::on_unknown_change): Update param
	from svalue_id to const svalue *.  Add is_mutable param.
	(setjmp_svalue::compare_fields): Delete.
	(setjmp_svalue::accept): New.
	(setjmp_svalue::add_to_hash): Delete.
	(setjmp_svalue::dump_to_pp): New.
	(setjmp_svalue::print_details): Delete.
	(impl_sm_context::impl_sm_context): Drop "change" param.
	(impl_sm_context::get_fndecl_for_call): Drop "m_change".
	(impl_sm_context::on_transition): Drop ATTRIBUTE_UNUSED from
	"stmt" param.  Drop m_change.  Port from svalue_id to
	const svalue *.
	(impl_sm_context::warn_for_state): Drop m_change.  Port from
	svalue_id to const svalue *.
	(impl_sm_context::get_readable_tree): Rename to...
	(impl_sm_context::get_diagnostic_tree): ...this.  Port from
	svalue_id to const svalue *.
	(impl_sm_context::is_zero_assignment): New.
	(impl_sm_context::m_change): Delete field.
	(leak_stmt_finder::find_stmt): Handle m_var being NULL.
	(readability):  Increase penalty for MEM_REF.  For SSA_NAMEs,
	slightly favor the underlying var over the SSA name.  Heavily
	penalize temporaries.  Handle RESULT_DECL.
	(readability_comparator): Make non-static.  Consider stack depths.
	(impl_region_model_context::on_state_leak): Convert from svalue_id
	to const svalue *, updating for region_model changes.  Use
	id_equal.
	(impl_region_model_context::on_inherited_svalue): Delete.
	(impl_region_model_context::on_cast): Delete.
	(impl_region_model_context::on_condition):  Drop m_change.
	(impl_region_model_context::on_phi): Likewise.
	(impl_region_model_context::on_unexpected_tree_code): Handle t
	being NULL.
	(point_and_state::validate): Update stack checking for
	region_model changes.
	(eg_traits::dump_args_t::show_enode_details_p): New.
	(exploded_node::exploded_node): Initialize m_num_processed_stmts.
	(exploded_node::get_processed_stmt): New function.
	(exploded_node::get_dot_fillcolor): Add more colors.
	(exploded_node::dump_dot): Guard the printing of the point and
	state with show_enode_details_p.  Print the processed stmts for
	this enode after the initial state.
	(exploded_node::dump_to_pp): Pass true for new multiline param
	of program_state::dump_to_pp.
	(exploded_node::on_stmt): Drop "change" param.  Log the stmt.
	Set input_location.  Implement __analyzer_describe.  Update
	implementation of __analyzer_dump and __analyzer_eval.
	Remove purging of sm-state for unknown fncalls from here.
	(exploded_node::on_edge): Drop "change" param.
	(exploded_node::on_longjmp): Port from region_id/svalue_id to
	const region */const svalue *.  Call program_state::detect_leaks.
	Drop state_change.
	(exploded_node::detect_leaks): Update for changes to region_model.
	Call program_state::detect_leaks.
	(exploded_edge::exploded_edge): Drop ext_state and change params.
	(exploded_edge::dump_dot): "args" is no longer used.  Drop dumping
	of m_change.
	(exploded_graph::exploded_graph): Pass engine to
	m_diagnostic_manager ctor.  Use program_point::origin.
	(exploded_graph::add_function_entry):  Drop ctxt.  Use
	program_state::push_frame.  Drop state_change.
	(exploded_graph::get_or_create_node): Drop "change" param.  Add
	"enode_for_diag" param.  Update dumping calls for API changes.
	Pass point to can_merge_with_p.  Show enode indices
	within -Wanalyzer-too-complex diagnostic for hitting the per-point
	limit.
	(exploded_graph::add_edge): Drop "change" param.  Log which nodes
	are being connected.  Update for changes to exploded_edge ctor.
	(exploded_graph::get_per_program_point_data): New.
	(exploded_graph::process_worklist): Pass point to
	can_merge_with_p.  Drop state_change.  Update dumping call for API
	change.
	(exploded_graph::process_node):  Drop state_change.  Split the
	node in-place if an sm-state-change occurs.  Update
	m_num_processed_stmts.  Update dumping calls for API change.
	(exploded_graph::log_stats): Call engine::log_stats.
	(exploded_graph::dump_states_for_supernode): Update dumping
	call.
	(exploded_path::feasible_p): Add "eng" and "eg" params.
	Rename "i" to "end_idx".  Pass the manager to the region_model
	ctor.  Update for every processed stmt in the enode, not just the
	first.  Keep track of which snodes have been visited, and call
	loop_replay_fixup when revisiting one.
	(enode_label::get_text): Update dump call for new param.
	(exploded_graph::dump_exploded_nodes): Likewise.
	(exploded_graph::get_node_by_index): New.
	(impl_run_checkers): Create engine instance and pass its address
	to extrinsic_state ctor.
	* exploded-graph.h
	(impl_region_model_context::impl_region_model_context): Drop
	"change" params.
	(impl_region_model_context::void remap_svalue_ids): Delete.
	(impl_region_model_context::on_svalue_purge): Delete.
	(impl_region_model_context::on_svalue_leak): New.
	(impl_region_model_context::on_liveness_change): New.
	(impl_region_model_context::on_state_leak): Update signature.
	(impl_region_model_context::on_inherited_svalue): Delete.
	(impl_region_model_context::on_cast): Delete.
	(impl_region_model_context::on_unknown_change): Update signature.
	(impl_region_model_context::m_change): Delete.
	(eg_traits::dump_args_t::show_enode_details_p): New.
	(exploded_node::on_stmt): Drop "change" param.
	(exploded_node::on_edge): Likewise.
	(exploded_node::get_processed_stmt): New decl.
	(exploded_node::m_num_processed_stmts): New field.
	(exploded_edge::exploded_edge): Drop ext_state and change params.
	(exploded_edge::m_change): Delete.
	(exploded_graph::get_engine): New accessor.
	(exploded_graph::get_or_create_node): Drop "change" param.  Add
	"enode_for_diag" param.
	(exploded_graph::add_edge): Drop "change" param.
	(exploded_graph::get_per_program_point_data): New decl.
	(exploded_graph::get_node_by_index): New decl.
	(exploded_path::feasible_p): Add "eng" and "eg" params.
	* program-point.cc: Include "analyzer/store.h" before including
	"analyzer/region-model.h".
	(function_point::function_point): Move here from
	program-point.h.
	(function_point::get_function): Likewise.
	(function_point::from_function_entry): Likewise.
	(function_point::before_supernode): Likewise.
	(function_point::next_stmt): New function.
	* program-point.h (function_point::function_point): Move
	implementation from here to program-point.cc.
	(function_point::get_function): Likewise.
	(function_point::from_function_entry): Likewise.
	(function_point::before_supernode): Likewise.
	(function_point::next_stmt): New decl.
	(program_point::operator!=): New.
	(program_point::origin): New.
	(program_point::next_stmt): New.
	(program_point::m_function_point): Make non-const.
	* program-state.cc: Move includes of "analyzer/call-string.h" and
	"analyzer/program-point.h" to before "analyzer/region-model.h",
	and also include "analyzer/store.h" before it.
	(extrinsic_state::get_model_manager): New.
	(sm_state_map::sm_state_map): Pass in sm and sm_idx to ctor,
	rather than pass the around.
	(sm_state_map::clone_with_remapping): Delete.
	(sm_state_map::print): Remove "sm" param in favor of "m_sm".  Add
	"simple" and "multiline" params and support multiline vs single
	line dumping.
	(sm_state_map::dump): Remove "sm" param in favor of "m_sm".  Add
	"simple" param.
	(sm_state_map::hash): Port from svalue_id to const svalue *.
	(sm_state_map::operator==): Likewise.
	(sm_state_map::get_state): Likewise.  Call canonicalize_svalue on
	input.  Handle inheritance of sm-state.  Call get_default_state.
	(sm_state_map::get_origin): Port from svalue_id to const svalue *.
	(sm_state_map::set_state): Likewise.  Pass in ext_state.  Reject
	attempts to set state on UNKNOWN.
	(sm_state_map::impl_set_state): Port from svalue_id to
	const svalue *.  Pass in ext_state.  Call canonicalize_svalue on
	input.
	(sm_state_map::purge_for_unknown_fncall): Delete.
	(sm_state_map::on_svalue_leak): New.
	(sm_state_map::remap_svalue_ids): Delete.
	(sm_state_map::on_liveness_change): New.
	(sm_state_map::on_unknown_change): Reimplement.
	(sm_state_map::on_svalue_purge): Delete.
	(sm_state_map::on_inherited_svalue): Delete.
	(sm_state_map::on_cast): Delete.
	(sm_state_map::validate): Delete.
	(sm_state_map::canonicalize_svalue): New.
	(program_state::program_state): Update to pass manager to
	region_model's ctor.  Constify num_states and pass state machine
	and index to sm_state_map ctor.
	(program_state::print): Update for changes to dump API.
	(program_state::dump_to_pp): Ignore the summarize param.  Add
	"multiline" param.
	(program_state::dump_to_file): Add "multiline" param.
	(program_state::dump): Pass "true" for new "multiline" param.
	(program_state::push_frame): New.
	(program_state::on_edge): Drop "change" param.  Call
	program_state::detect_leaks.
	(program_state::prune_for_point): Add enode_for_diag param.
	Reimplement based on store class.  Call detect_leaks
	(program_state::remap_svalue_ids): Delete.
	(program_state::get_representative_tree): Port from svalue_id to
	const svalue *.
	(program_state::can_merge_with_p): Add "point" param.  Add early
	reject for sm-differences.  Drop id remapping.
	(program_state::validate): Drop region model and sm_state_map
	validation.
	(state_change::sm_change::dump): Delete.
	(state_change::sm_change::remap_svalue_ids): Delete.
	(state_change::sm_change::on_svalue_purge): Delete.
	(log_set_of_svalues): New.
	(state_change::sm_change::validate): Delete.
	(state_change::state_change): Delete.
	(state_change::add_sm_change): Delete.
	(state_change::affects_p): Delete.
	(state_change::dump): Delete.
	(state_change::remap_svalue_ids): Delete.
	(state_change::on_svalue_purge): Delete.
	(state_change::validate): Delete.
	(selftest::assert_dump_eq): Delete.
	(ASSERT_DUMP_EQ): Delete.
	(selftest::test_sm_state_map): Update for changes to region_model
	and sm_state_map, porting from svalue_id to const svalue *.
	(selftest::test_program_state_dumping): Likewise.  Drop test of
	dumping, renaming to...
	(selftest::test_program_state_1): ...this.
	(selftest::test_program_state_dumping_2): Likewise, renaming to...
	(selftest::test_program_state_2): ...this.
	(selftest::test_program_state_merging): Update for changes to
	region_model.
	(selftest::test_program_state_merging_2): Likewise.
	(selftest::analyzer_program_state_cc_tests): Update for renamed
	tests.
	* program-state.h (extrinsic_state::extrinsic_state): Add logger
	and engine params.
	(extrinsic_state::get_logger): New accessor.
	(extrinsic_state::get_engine): New accessor.
	(extrinsic_state::get_model_manager): New accessor.
	(extrinsic_state::m_logger): New field.
	(extrinsic_state::m_engine): New field.
	(struct default_hash_traits<svalue_id>): Delete.
	(pod_hash_traits<svalue_id>::hash): Delete.
	(pod_hash_traits<svalue_id>::equal): Delete.
	(pod_hash_traits<svalue_id>::mark_deleted): Delete.
	(pod_hash_traits<svalue_id>::mark_empty): Delete.
	(pod_hash_traits<svalue_id>::is_deleted): Delete.
	(pod_hash_traits<svalue_id>::is_empty): Delete.
	(sm_state_map::entry_t::entry_t): Port from svalue_id to
	const svalue *.
	(sm_state_map::entry_t::m_origin): Likewise.
	(sm_state_map::map_t): Likewise.
	(sm_state_map::sm_state_map): Add state_machine and index params.
	(sm_state_map::clone_with_remapping): Delete.
	(sm_state_map::print):  Drop sm param; add simple and multiline
	params.
	(sm_state_map::dump): Drop sm param; add simple param.
	(sm_state_map::get_state): Port from svalue_id to const svalue *.
	Add ext_state param.
	(sm_state_map::get_origin): Likewise.
	(sm_state_map::set_state): Likewise.
	(sm_state_map::impl_set_state): Likewise.
	(sm_state_map::purge_for_unknown_fncall): Delete.
	(sm_state_map::remap_svalue_ids): Delete.
	(sm_state_map::on_svalue_purge): Delete.
	(sm_state_map::on_svalue_leak): New.
	(sm_state_map::on_liveness_change): New.
	(sm_state_map::on_inherited_svalue): Delete.
	(sm_state_map::on_cast): Delete.
	(sm_state_map::validate): Delete.
	(sm_state_map::on_unknown_change): Port from svalue_id to
	const svalue *.  Add is_mutable and ext_state params.
	(sm_state_map::canonicalize_svalue): New.
	(sm_state_map::m_sm): New field.
	(sm_state_map::m_sm_idx): New field.
	(program_state::operator=): Delete.
	(program_state::dump_to_pp): Drop "summarize" param, adding
	"simple" and "multiline".
	(program_state::dump_to_file): Likewise.
	(program_state::dump): Rename "summarize" to "simple".
	(program_state::push_frame): New.
	(program_state::get_current_function): New.
	(program_state::on_edge): Drop "change" param.
	(program_state::prune_for_point): Likewise.  Add enode_for_diag
	param.
	(program_state::remap_svalue_ids): Delete.
	(program_state::get_representative_tree): Port from svalue_id to
	const svalue *.
	(program_state::can_purge_p): Likewise.  Pass ext_state to get_state.
	(program_state::can_merge_with_p): Add point param.
	(program_state::detect_leaks): New.
	(state_change_visitor::on_state_change): Port from tree and
	svalue_id to a pair of const svalue *.
	(class state_change): Delete.
	* region.cc: New file.
	* region-model-impl-calls.cc: New file.
	* region-model-manager.cc: New file.
	* region-model-reachability.cc: New file.
	* region-model-reachability.h: New file.
	* region-model.cc: Include "analyzer/call-string.h",
	"analyzer/program-point.h", and "analyzer/store.h" before
	"analyzer/region-model.h".  Include
	"analyzer/region-model-reachability.h".
	(dump_tree): Make non-static.
	(dump_quoted_tree): Make non-static.
	(print_quoted_type): Make non-static.
	(path_var::dump): Delete.
	(dump_separator): Delete.
	(class impl_constraint_manager): Delete.
	(svalue_id::print): Delete.
	(svalue_id::dump_node_name_to_pp): Delete.
	(svalue_id::validate): Delete.
	(region_id::print): Delete.
	(region_id::dump_node_name_to_pp): Delete.
	(region_id::validate): Delete.
	(region_id_set::region_id_set): Delete.
	(svalue_id_set::svalue_id_set): Delete.
	(svalue::operator==): Delete.
	(svalue::hash): Delete.
	(svalue::print): Delete.
	(svalue::dump_dot_to_pp): Delete.
	(svalue::remap_region_ids): Delete.
	(svalue::walk_for_canonicalization): Delete.
	(svalue::get_child_sid): Delete.
	(svalue::maybe_get_constant): Delete.
	(region_svalue::compare_fields): Delete.
	(region_svalue::add_to_hash): Delete.
	(region_svalue::print_details): Delete.
	(region_svalue::dump_dot_to_pp): Delete.
	(region_svalue::remap_region_ids): Delete.
	(region_svalue::merge_values): Delete.
	(region_svalue::walk_for_canonicalization): Delete.
	(region_svalue::eval_condition): Delete.
	(constant_svalue::compare_fields): Delete.
	(constant_svalue::add_to_hash): Delete.
	(constant_svalue::merge_values): Delete.
	(constant_svalue::eval_condition): Move to svalue.cc.
	(constant_svalue::print_details): Delete.
	(constant_svalue::get_child_sid): Delete.
	(unknown_svalue::compare_fields): Delete.
	(unknown_svalue::add_to_hash): Delete.
	(unknown_svalue::print_details): Delete.
	(poison_kind_to_str): Move to svalue.cc.
	(poisoned_svalue::compare_fields): Delete.
	(poisoned_svalue::add_to_hash): Delete.
	(poisoned_svalue::print_details): Delete.
	(region_kind_to_str): Move to region.cc and reimplement.
	(region::operator==): Delete.
	(region::get_parent_region): Delete.
	(region::set_value): Delete.
	(region::become_active_view): Delete.
	(region::deactivate_any_active_view): Delete.
	(region::deactivate_view): Delete.
	(region::get_value): Delete.
	(region::get_inherited_child_sid): Delete.
	(region_model::copy_region): Delete.
	(region_model::copy_struct_region): Delete.
	(region_model::copy_union_region): Delete.
	(region_model::copy_array_region): Delete.
	(region::hash): Delete.
	(region::print): Delete.
	(region::dump_dot_to_pp): Delete.
	(region::dump_to_pp): Delete.
	(region::dump_child_label): Delete.
	(region::validate): Delete.
	(region::remap_svalue_ids): Delete.
	(region::remap_region_ids): Delete.
	(region::add_view): Delete.
	(region::get_view): Delete.
	(region::region): Move to region.cc.
	(region::add_to_hash): Delete.
	(region::print_fields): Delete.
	(region::non_null_p): Delete.
	(primitive_region::clone): Delete.
	(primitive_region::walk_for_canonicalization): Delete.
	(map_region::map_region): Delete.
	(map_region::compare_fields): Delete.
	(map_region::print_fields): Delete.
	(map_region::validate): Delete.
	(map_region::dump_dot_to_pp): Delete.
	(map_region::dump_child_label): Delete.
	(map_region::get_or_create): Delete.
	(map_region::get): Delete.
	(map_region::add_to_hash): Delete.
	(map_region::remap_region_ids): Delete.
	(map_region::unbind): Delete.
	(map_region::get_tree_for_child_region): Delete.
	(map_region::get_tree_for_child_region): Delete.
	(tree_cmp): Move to region.cc.
	(map_region::can_merge_p): Delete.
	(map_region::walk_for_canonicalization): Delete.
	(map_region::get_value_by_name): Delete.
	(struct_or_union_region::valid_key_p): Delete.
	(struct_or_union_region::compare_fields): Delete.
	(struct_region::clone): Delete.
	(struct_region::compare_fields): Delete.
	(union_region::clone): Delete.
	(union_region::compare_fields): Delete.
	(frame_region::compare_fields): Delete.
	(frame_region::clone): Delete.
	(frame_region::valid_key_p): Delete.
	(frame_region::print_fields): Delete.
	(frame_region::add_to_hash): Delete.
	(globals_region::compare_fields): Delete.
	(globals_region::clone): Delete.
	(globals_region::valid_key_p): Delete.
	(code_region::compare_fields): Delete.
	(code_region::clone): Delete.
	(code_region::valid_key_p): Delete.
	(array_region::array_region): Delete.
	(array_region::get_element): Delete.
	(array_region::clone): Delete.
	(array_region::compare_fields): Delete.
	(array_region::print_fields): Delete.
	(array_region::validate): Delete.
	(array_region::dump_dot_to_pp): Delete.
	(array_region::dump_child_label): Delete.
	(array_region::get_or_create): Delete.
	(array_region::get): Delete.
	(array_region::add_to_hash): Delete.
	(array_region::remap_region_ids): Delete.
	(array_region::get_key_for_child_region): Delete.
	(array_region::key_cmp): Delete.
	(array_region::walk_for_canonicalization): Delete.
	(array_region::key_from_constant): Delete.
	(array_region::constant_from_key): Delete.
	(function_region::compare_fields): Delete.
	(function_region::clone): Delete.
	(function_region::valid_key_p): Delete.
	(stack_region::stack_region): Delete.
	(stack_region::compare_fields): Delete.
	(stack_region::clone): Delete.
	(stack_region::print_fields): Delete.
	(stack_region::dump_child_label): Delete.
	(stack_region::validate): Delete.
	(stack_region::push_frame): Delete.
	(stack_region::get_current_frame_id): Delete.
	(stack_region::pop_frame): Delete.
	(stack_region::add_to_hash): Delete.
	(stack_region::remap_region_ids): Delete.
	(stack_region::can_merge_p): Delete.
	(stack_region::walk_for_canonicalization): Delete.
	(stack_region::get_value_by_name): Delete.
	(heap_region::heap_region): Delete.
	(heap_region::compare_fields): Delete.
	(heap_region::clone): Delete.
	(heap_region::walk_for_canonicalization): Delete.
	(root_region::root_region): Delete.
	(root_region::compare_fields): Delete.
	(root_region::clone): Delete.
	(root_region::print_fields): Delete.
	(root_region::validate): Delete.
	(root_region::dump_child_label): Delete.
	(root_region::push_frame): Delete.
	(root_region::get_current_frame_id): Delete.
	(root_region::pop_frame): Delete.
	(root_region::ensure_stack_region): Delete.
	(root_region::get_stack_region): Delete.
	(root_region::ensure_globals_region): Delete.
	(root_region::get_code_region): Delete.
	(root_region::ensure_code_region): Delete.
	(root_region::get_globals_region): Delete.
	(root_region::ensure_heap_region): Delete.
	(root_region::get_heap_region): Delete.
	(root_region::remap_region_ids): Delete.
	(root_region::can_merge_p): Delete.
	(root_region::add_to_hash): Delete.
	(root_region::walk_for_canonicalization): Delete.
	(root_region::get_value_by_name): Delete.
	(symbolic_region::symbolic_region): Delete.
	(symbolic_region::compare_fields): Delete.
	(symbolic_region::clone): Delete.
	(symbolic_region::walk_for_canonicalization): Delete.
	(symbolic_region::print_fields): Delete.
	(region_model::region_model): Add region_model_manager * param.
	Reimplement in terms of store, dropping impl_constraint_manager
	subclass.
	(region_model::operator=): Reimplement in terms of store
	(region_model::operator==): Likewise.
	(region_model::hash): Likewise.
	(region_model::print): Delete.
	(region_model::print_svalue): Delete.
	(region_model::dump_dot_to_pp): Delete.
	(region_model::dump_dot_to_file): Delete.
	(region_model::dump_dot): Delete.
	(region_model::dump_to_pp): Replace "summarize" param with
	"simple" and "multiline".  Port to store-based implementation.
	(region_model::dump): Replace "summarize" param with "simple" and
	"multiline".
	(dump_vec_of_tree): Delete.
	(region_model::dump_summary_of_rep_path_vars): Delete.
	(region_model::validate): Delete.
	(svalue_id_cmp_by_constant_svalue_model): Delete.
	(svalue_id_cmp_by_constant_svalue): Delete.
	(region_model::canonicalize): Drop "ctxt" param.  Reimplement in
	terms of store and constraints.
	(region_model::canonicalized_p): Remove NULL arg to canonicalize.
	(region_model::loop_replay_fixup): New.
	(poisoned_value_diagnostic::emit): Tweak wording of warnings.
	(region_model::check_for_poison): Delete.
	(region_model::get_gassign_result): New.
	(region_model::on_assignment): Port to store-based implementation.
	(region_model::on_call_pre): Delete calls to check_for_poison.
	Move implementations to region-model-impl-calls.c and port to
	store-based implementation.
	(region_model::on_call_post): Likewise.
	(class reachable_regions): Move to region-model-reachability.h/cc
	and port to store-based implementation.
	(region_model::handle_unrecognized_call): Port to store-based
	implementation.
	(region_model::get_reachable_svalues): New.
	(region_model::on_setjmp): Port to store-based implementation.
	(region_model::on_longjmp): Likewise.
	(region_model::handle_phi): Drop is_back_edge param and the logic
	using it.
	(region_model::get_lvalue_1): Port from region_id to const region *.
	(region_model::make_region_for_unexpected_tree_code): Delete.
	(assert_compat_types): If the check fails, use internal_error to
	show the types.
	(region_model::get_lvalue): Port from region_id to const region *.
	(region_model::get_rvalue_1): Port from svalue_id to const svalue *.
	(region_model::get_rvalue): Likewise.
	(region_model::get_or_create_ptr_svalue): Delete.
	(region_model::get_or_create_constant_svalue): Delete.
	(region_model::get_svalue_for_fndecl): Delete.
	(region_model::get_region_for_fndecl): Delete.
	(region_model::get_svalue_for_label): Delete.
	(region_model::get_region_for_label): Delete.
	(build_cast): Delete.
	(region_model::maybe_cast_1): Delete.
	(region_model::maybe_cast): Delete.
	(region_model::get_field_region): Delete.
	(region_model::get_store_value): New.
	(region_model::region_exists_p): New.
	(region_model::deref_rvalue): Port from svalue_id to const svalue *.
	(region_model::set_value): Likewise.
	(region_model::clobber_region): New.
	(region_model::purge_region): New.
	(region_model::zero_fill_region): New.
	(region_model::mark_region_as_unknown): New.
	(region_model::eval_condition): Port from svalue_id to
	const svalue *.
	(region_model::eval_condition_without_cm): Likewise.
	(region_model::compare_initial_and_pointer): New.
	(region_model::add_constraint): Port from svalue_id to
	const svalue *.
	(region_model::maybe_get_constant): Delete.
	(region_model::get_representative_path_var): New.
	(region_model::add_new_malloc_region): Delete.
	(region_model::get_representative_tree): Port to const svalue *.
	(region_model::get_representative_path_var): Port to
	const region *.
	(region_model::get_path_vars_for_svalue): Delete.
	(region_model::set_to_new_unknown_value): Delete.
	(region_model::update_for_phis): Don't pass is_back_edge to handle_phi.
	(region_model::update_for_call_superedge): Port from svalue_id to
	const svalue *.
	(region_model::update_for_return_superedge): Port to store-based
	implementation.
	(region_model::update_for_call_summary): Replace
	set_to_new_unknown_value with mark_region_as_unknown.
	(region_model::get_root_region): Delete.
	(region_model::get_stack_region_id): Delete.
	(region_model::push_frame): Delete.
	(region_model::get_current_frame_id): Delete.
	(region_model::get_current_function): Delete.
	(region_model::pop_frame): Delete.
	(region_model::on_top_level_param): New.
	(region_model::get_stack_depth): Delete.
	(region_model::get_function_at_depth): Delete.
	(region_model::get_globals_region_id): Delete.
	(region_model::add_svalue): Delete.
	(region_model::replace_svalue): Delete.
	(region_model::add_region): Delete.
	(region_model::get_svalue): Delete.
	(region_model::get_region): Delete.
	(make_region_for_type): Delete.
	(region_model::add_region_for_type): Delete.
	(region_model::on_top_level_param): New.
	(class restrict_to_used_svalues): Delete.
	(region_model::purge_unused_svalues): Delete.
	(region_model::push_frame): New.
	(region_model::remap_svalue_ids): Delete.
	(region_model::remap_region_ids): Delete.
	(region_model::purge_regions): Delete.
	(region_model::get_descendents): Delete.
	(region_model::delete_region_and_descendents): Delete.
	(region_model::poison_any_pointers_to_bad_regions): Delete.
	(region_model::can_merge_with_p): Delete.
	(region_model::get_current_function): New.
	(region_model::get_value_by_name): Delete.
	(region_model::convert_byte_offset_to_array_index): Delete.
	(region_model::pop_frame): New.
	(region_model::get_or_create_mem_ref): Delete.
	(region_model::get_stack_depth): New.
	(region_model::get_frame_at_index): New.
	(region_model::unbind_region_and_descendents): New.
	(struct bad_pointer_finder): New.
	(region_model::get_or_create_pointer_plus_expr): Delete.
	(region_model::poison_any_pointers_to_descendents): New.
	(region_model::get_or_create_view): Delete.
	(region_model::can_merge_with_p): New.
	(region_model::get_fndecl_for_call):  Port from svalue_id to
	const svalue *.
	(struct append_ssa_names_cb_data): New.
	(get_ssa_name_regions_for_current_frame): New.
	(region_model::append_ssa_names_cb): New.
	(model_merger::dump_to_pp): Add "simple" param.  Drop dumping of
	remappings.
	(model_merger::dump): Add "simple" param to both overloads.
	(model_merger::can_merge_values_p): Delete.
	(model_merger::record_regions): Delete.
	(model_merger::record_svalues): Delete.
	(svalue_id_merger_mapping::svalue_id_merger_mapping): Delete.
	(svalue_id_merger_mapping::dump_to_pp): Delete.
	(svalue_id_merger_mapping::dump): Delete.
	(region_model::create_region_for_heap_alloc): New.
	(region_model::create_region_for_alloca): New.
	(region_model::record_dynamic_extents): New.
	(canonicalization::canonicalization): Delete.
	(canonicalization::walk_rid): Delete.
	(canonicalization::walk_sid): Delete.
	(canonicalization::dump_to_pp): Delete.
	(canonicalization::dump): Delete.
	(inchash::add): Delete overloads for svalue_id and region_id.
	(engine::log_stats): New.
	(assert_condition): Add overload comparing svalues.
	(assert_dump_eq): Pass "true" for multiline.
	(selftest::test_dump): Update for rewrite of region_model.
	(selftest::test_dump_2): Rename to...
	(selftest::test_struct): ...this.  Provide a region_model_manager
	when creating region_model instance.  Remove dump test.  Add
	checks for get_offset.
	(selftest::test_dump_3): Rename to...
	(selftest::test_array_1): ...this.  Provide a region_model_manager
	when creating region_model instance.  Remove dump test.
	(selftest::test_get_representative_tree): Port from svalue_id to
	new API.  Add test coverage for various expressions.
	(selftest::test_unique_constants): Provide a region_model_manager
	for the region_model.  Add test coverage for comparing const vs
	non-const.
	(selftest::test_svalue_equality): Delete.
	(selftest::test_region_equality): Delete.
	(selftest::test_unique_unknowns): New.
	(class purge_all_svalue_ids): Delete.
	(class purge_one_svalue_id): Delete.
	(selftest::test_purging_by_criteria): Delete.
	(selftest::test_initial_svalue_folding): New.
	(selftest::test_unaryop_svalue_folding): New.
	(selftest::test_binop_svalue_folding): New.
	(selftest::test_sub_svalue_folding): New.
	(selftest::test_purge_unused_svalues): Delete.
	(selftest::test_descendent_of_p): New.
	(selftest::test_assignment): Provide a region_model_manager for
	the region_model.  Drop the dump test.
	(selftest::test_compound_assignment): Likewise.
	(selftest::test_stack_frames): Port to new implementation.
	(selftest::test_get_representative_path_var): Likewise.
	(selftest::test_canonicalization_1): Rename to...
	(selftest::test_equality_1): ...this.  Port to new API, and add
	(selftest::test_canonicalization_2): Provide a
	region_model_manager when creating region_model instances.
	Remove redundant canicalization.
	(selftest::test_canonicalization_3): Provide a
	region_model_manager when creating region_model instances.
	Remove param from calls to region_model::canonicalize.
	(selftest::test_canonicalization_4): Likewise.
	(selftest::assert_region_models_merge): Constify
	out_merged_svalue.  Port to new API.
	(selftest::test_state_merging): Provide a
	region_model_manager when creating region_model instances.
	Provide a program_point point when merging them.  Replace
	set_to_new_unknown_value with usage of placeholder_svalues.
	Drop get_value_by_name.  Port from svalue_id to const svalue *.
	Add test of heap allocation.
	(selftest::test_constraint_merging):  Provide a
	region_model_manager when creating region_model instances.
	Provide a program_point point when merging them.  Eliminate use
	of set_to_new_unknown_value.
	(selftest::test_widening_constraints): New.
	(selftest::test_iteration_1): New.
	(selftest::test_malloc_constraints): Port to store-based
	implementation.
	(selftest::test_var): New test.
	(selftest::test_array_2): New test.
	(selftest::test_mem_ref): New test.
	(selftest::test_POINTER_PLUS_EXPR_then_MEM_REF): New.
	(selftest::test_malloc): New.
	(selftest::test_alloca): New.
	(selftest::analyzer_region_model_cc_tests): Update for renamings.
	Call new functions.
	* region-model.h (class path_var): Move to analyzer.h.
	(class svalue_id): Delete.
	(class region_id): Delete.
	(class id_map): Delete.
	(svalue_id_map): Delete.
	(region_id_map): Delete.
	(id_map<T>::id_map): Delete.
	(id_map<T>::put): Delete.
	(id_map<T>::get_dst_for_src): Delete.
	(id_map<T>::get_src_for_dst): Delete.
	(id_map<T>::dump_to_pp): Delete.
	(id_map<T>::dump): Delete.
	(id_map<T>::update): Delete.
	(one_way_svalue_id_map): Delete.
	(one_way_region_id_map): Delete.
	(class region_id_set): Delete.
	(class svalue_id_set): Delete.
	(struct complexity): New.
	(class visitor): New.
	(enum svalue_kind): Add SK_SETJMP, SK_INITIAL, SK_UNARYOP,
	SK_BINOP, SK_SUB,SK_UNMERGEABLE, SK_PLACEHOLDER, SK_WIDENING,
	SK_COMPOUND, and SK_CONJURED.
	(svalue::operator==): Delete.
	(svalue::operator!=): Delete.
	(svalue::clone): Delete.
	(svalue::hash): Delete.
	(svalue::dump_dot_to_pp): Delete.
	(svalue::dump_to_pp): New.
	(svalue::dump): New.
	(svalue::get_desc): New.
	(svalue::dyn_cast_initial_svalue): New.
	(svalue::dyn_cast_unaryop_svalue): New.
	(svalue::dyn_cast_binop_svalue): New.
	(svalue::dyn_cast_sub_svalue): New.
	(svalue::dyn_cast_unmergeable_svalue): New.
	(svalue::dyn_cast_widening_svalue): New.
	(svalue::dyn_cast_compound_svalue): New.
	(svalue::dyn_cast_conjured_svalue): New.
	(svalue::maybe_undo_cast): New.
	(svalue::unwrap_any_unmergeable): New.
	(svalue::remap_region_ids): Delete
	(svalue::can_merge_p): New.
	(svalue::walk_for_canonicalization): Delete
	(svalue::get_complexity): New.
	(svalue::get_child_sid): Delete
	(svalue::accept): New.
	(svalue::live_p): New.
	(svalue::implicitly_live_p): New.
	(svalue::svalue): Add complexity param.
	(svalue::add_to_hash): Delete
	(svalue::print_details): Delete
	(svalue::m_complexity): New field.
	(region_svalue::key_t): New struct.
	(region_svalue::region_svalue): Port from region_id to
	const region_id *.  Add complexity.
	(region_svalue::compare_fields): Delete.
	(region_svalue::clone): Delete.
	(region_svalue::dump_dot_to_pp): Delete.
	(region_svalue::get_pointee): Port from region_id to
	const region_id *.
	(region_svalue::remap_region_ids): Delete.
	(region_svalue::merge_values): Delete.
	(region_svalue::dump_to_pp): New.
	(region_svalue::accept): New.
	(region_svalue::walk_for_canonicalization): Delete.
	(region_svalue::eval_condition): Make params const.
	(region_svalue::add_to_hash): Delete.
	(region_svalue::print_details): Delete.
	(region_svalue::m_rid): Replace with...
	(region_svalue::m_reg): ...this.
	(is_a_helper <region_svalue *>::test): Convert to...
	(is_a_helper <const region_svalue *>::test): ...this.
	(template <> struct default_hash_traits<region_svalue::key_t>):
	New.
	(constant_svalue::constant_svalue): Add complexity.
	(constant_svalue::compare_fields): Delete.
	(constant_svalue::clone): Delete.
	(constant_svalue::add_to_hash): Delete.
	(constant_svalue::dump_to_pp): New.
	(constant_svalue::accept): New.
	(constant_svalue::implicitly_live_p): New.
	(constant_svalue::merge_values): Delete.
	(constant_svalue::eval_condition): Make params const.
	(constant_svalue::get_child_sid): Delete.
	(constant_svalue::print_details): Delete.
	(is_a_helper <constant_svalue *>::test): Convert to...
	(is_a_helper <const constant_svalue *>::test): ...this.
	(class unknown_svalue): Update leading comment.
	(unknown_svalue::unknown_svalue): Add complexity.
	(unknown_svalue::compare_fields): Delete.
	(unknown_svalue::add_to_hash): Delete.
	(unknown_svalue::dyn_cast_unknown_svalue): Delete.
	(unknown_svalue::print_details): Delete.
	(unknown_svalue::dump_to_pp): New.
	(unknown_svalue::accept): New.
	(poisoned_svalue::key_t): New struct.
	(poisoned_svalue::poisoned_svalue): Add complexity.
	(poisoned_svalue::compare_fields): Delete.
	(poisoned_svalue::clone): Delete.
	(poisoned_svalue::add_to_hash): Delete.
	(poisoned_svalue::dump_to_pp): New.
	(poisoned_svalue::accept): New.
	(poisoned_svalue::print_details): Delete.
	(is_a_helper <poisoned_svalue *>::test): Convert to...
	(is_a_helper <const poisoned_svalue *>::test): ...this.
	(template <> struct default_hash_traits<poisoned_svalue::key_t>):
	New.
	(setjmp_record::add_to_hash): New.
	(setjmp_svalue::key_t): New struct.
	(setjmp_svalue::compare_fields): Delete.
	(setjmp_svalue::clone): Delete.
	(setjmp_svalue::add_to_hash): Delete.
	(setjmp_svalue::setjmp_svalue): Add complexity.
	(setjmp_svalue::dump_to_pp): New.
	(setjmp_svalue::accept): New.
	(setjmp_svalue::void print_details): Delete.
	(is_a_helper <const setjmp_svalue *>::test): New.
	(template <> struct default_hash_traits<setjmp_svalue::key_t>): New.
	(class initial_svalue : public svalue): New.
	(is_a_helper <const initial_svalue *>::test): New.
	(class unaryop_svalue): New.
	(is_a_helper <const unaryop_svalue *>::test): New.
	(template <> struct default_hash_traits<unaryop_svalue::key_t>): New.
	(class binop_svalue): New.
	(is_a_helper <const binop_svalue *>::test): New.
	(template <> struct default_hash_traits<binop_svalue::key_t>): New.
	(class sub_svalue): New.
	(is_a_helper <const sub_svalue *>::test): New.
	(template <> struct default_hash_traits<sub_svalue::key_t>): New.
	(class unmergeable_svalue): New.
	(is_a_helper <const unmergeable_svalue *>::test): New.
	(class placeholder_svalue): New.
	(is_a_helper <placeholder_svalue *>::test): New.
	(class widening_svalue): New.
	(is_a_helper <widening_svalue *>::test): New.
	(template <> struct default_hash_traits<widening_svalue::key_t>): New.
	(class compound_svalue): New.
	(is_a_helper <compound_svalue *>::test): New.
	(template <> struct default_hash_traits<compound_svalue::key_t>): New.
	(class conjured_svalue): New.
	(is_a_helper <conjured_svalue *>::test): New.
	(template <> struct default_hash_traits<conjured_svalue::key_t>): New.
	(enum region_kind): Delete RK_PRIMITIVE, RK_STRUCT, RK_UNION, and
	RK_ARRAY.  Add RK_LABEL, RK_DECL, RK_FIELD, RK_ELEMENT, RK_OFFSET,
	RK_CAST, RK_HEAP_ALLOCATED, RK_ALLOCA, RK_STRING, and RK_UNKNOWN.
	(region_kind_to_str): Delete.
	(region::~region): Move implementation to region.cc.
	(region::operator==): Delete.
	(region::operator!=): Delete.
	(region::clone): Delete.
	(region::get_id): New.
	(region::cmp_ids): New.
	(region::dyn_cast_map_region): Delete.
	(region::dyn_cast_array_region): Delete.
	(region::region_id get_parent): Delete.
	(region::get_parent_region): Convert to a simple accessor.
	(region::void set_value): Delete.
	(region::svalue_id get_value): Delete.
	(region::svalue_id get_value_direct): Delete.
	(region::svalue_id get_inherited_child_sid): Delete.
	(region::dyn_cast_frame_region): New.
	(region::dyn_cast_function_region): New.
	(region::dyn_cast_decl_region): New.
	(region::dyn_cast_field_region): New.
	(region::dyn_cast_element_region): New.
	(region::dyn_cast_offset_region): New.
	(region::dyn_cast_cast_region): New.
	(region::dyn_cast_string_region): New.
	(region::accept): New.
	(region::get_base_region): New.
	(region::base_region_p): New.
	(region::descendent_of_p): New.
	(region::maybe_get_frame_region): New.
	(region::maybe_get_decl): New.
	(region::hash): Delete.
	(region::rint): Delete.
	(region::dump_dot_to_pp): Delete.
	(region::get_desc): New.
	(region::dump_to_pp): Convert to vfunc, changing signature.
	(region::dump_child_label): Delete.
	(region::remap_svalue_ids): Delete.
	(region::remap_region_ids): Delete.
	(region::dump): New.
	(region::walk_for_canonicalization): Delete.
	(region::non_null_p): Drop region_model param.
	(region::add_view): Delete.
	(region::get_view): Delete.
	(region::get_active_view): Delete.
	(region::is_view_p): Delete.
	(region::cmp_ptrs): New.
	(region::validate): Delete.
	(region::get_offset): New.
	(region::get_byte_size): New.
	(region::get_bit_size): New.
	(region::get_subregions_for_binding): New.
	(region::region): Add complexity param.  Convert parent from
	region_id to const region *.  Drop svalue_id.  Drop copy ctor.
	(region::symbolic_for_unknown_ptr_p): New.
	(region::add_to_hash): Delete.
	(region::print_fields): Delete.
	(region::get_complexity): New accessor.
	(region::become_active_view): Delete.
	(region::deactivate_any_active_view): Delete.
	(region::deactivate_view): Delete.
	(region::calc_offset): New.
	(region::m_parent_rid): Delete.
	(region::m_sval_id): Delete.
	(region::m_complexity): New.
	(region::m_id): New.
	(region::m_parent): New.
	(region::m_view_rids): Delete.
	(region::m_is_view): Delete.
	(region::m_active_view_rid): Delete.
	(region::m_cached_offset): New.
	(is_a_helper <region *>::test): Convert to...
	(is_a_helper <const region *>::test): ... this.
	(class primitive_region): Delete.
	(class space_region): New.
	(class map_region): Delete.
	(is_a_helper <map_region *>::test): Delete.
	(class frame_region): Reimplement.
	(template <> struct default_hash_traits<frame_region::key_t>):
	New.
	(class globals_region): Reimplement.
	(is_a_helper <globals_region *>::test): Convert to...
	(is_a_helper <const globals_region *>::test): ...this.
	(class struct_or_union_region): Delete.
	(is_a_helper <struct_or_union_region *>::test): Delete.
	(class code_region): Reimplement.
	(is_a_helper <const code_region *>::test): New.
	(class struct_region): Delete.
	(is_a_helper <struct_region *>::test): Delete.
	(class function_region): Reimplement.
	(is_a_helper <function_region *>::test): Convert to...
	(is_a_helper <const function_region *>::test): ...this.
	(class union_region): Delete.
	(is_a_helper <union_region *>::test): Delete.
	(class label_region): New.
	(is_a_helper <const label_region *>::test): New.
	(class scope_region): Delete.
	(class stack_region): Reimplement.
	(is_a_helper <stack_region *>::test): Convert to...
	(is_a_helper <const stack_region *>::test): ...this.
	(class heap_region): Reimplement.
	(is_a_helper <heap_region *>::test): Convert to...
	(is_a_helper <const heap_region *>::test): ...this.
	(class root_region): Reimplement.
	(is_a_helper <root_region *>::test): Convert to...
	(is_a_helper <const root_region *>::test): ...this.
	(class symbolic_region): Reimplement.
	(is_a_helper <const symbolic_region *>::test): New.
	(template <> struct default_hash_traits<symbolic_region::key_t>):
	New.
	(class decl_region): New.
	(is_a_helper <const decl_region *>::test): New.
	(class field_region): New.
	(template <> struct default_hash_traits<field_region::key_t>): New.
	(class array_region): Delete.
	(class element_region): New.
	(is_a_helper <array_region *>::test): Delete.
	(is_a_helper <const element_region *>::test): New.
	(template <> struct default_hash_traits<element_region::key_t>):
	New.
	(class offset_region): New.
	(is_a_helper <const offset_region *>::test): New.
	(template <> struct default_hash_traits<offset_region::key_t>):
	New.
	(class cast_region): New.
	(is_a_helper <const cast_region *>::test): New.
	(template <> struct default_hash_traits<cast_region::key_t>): New.
	(class heap_allocated_region): New.
	(class alloca_region): New.
	(class string_region): New.
	(is_a_helper <const string_region *>::test): New.
	(class unknown_region): New.
	(class region_model_manager): New.
	(struct append_ssa_names_cb_data): New.
	(class call_details): New.
	(region_model::region_model): Add region_model_manager param.
	(region_model::print_svalue): Delete.
	(region_model::dump_dot_to_pp): Delete.
	(region_model::dump_dot_to_file): Delete.
	(region_model::dump_dot): Delete.
	(region_model::dump_to_pp): Drop summarize param in favor of
	simple and multiline.
	(region_model::dump): Likewise.
	(region_model::summarize_to_pp): Delete.
	(region_model::summarize): Delete.
	(region_model::void canonicalize): Drop ctxt param.
	(region_model::void check_for_poison): Delete.
	(region_model::get_gassign_result): New.
	(region_model::impl_call_alloca): New.
	(region_model::impl_call_analyzer_describe): New.
	(region_model::impl_call_analyzer_eval): New.
	(region_model::impl_call_builtin_expect): New.
	(region_model::impl_call_calloc): New.
	(region_model::impl_call_free): New.
	(region_model::impl_call_malloc): New.
	(region_model::impl_call_memset): New.
	(region_model::impl_call_strlen): New.
	(region_model::get_reachable_svalues): New.
	(region_model::handle_phi): Drop is_back_edge param.
	(region_model::region_id get_root_rid): Delete.
	(region_model::root_region *get_root_region): Delete.
	(region_model::region_id get_stack_region_id): Delete.
	(region_model::push_frame): Convert from region_id and svalue_id
	to const region * and const svalue *.
	(region_model::get_current_frame_id): Replace with...
	(region_model::get_current_frame): ...this.
	(region_model::pop_frame): Convert from region_id to
	const region *.  Drop purge and stats param.  Add out_result.
	(region_model::function *get_function_at_depth): Delete.
	(region_model::get_globals_region_id): Delete.
	(region_model::add_svalue): Delete.
	(region_model::replace_svalue): Delete.
	(region_model::add_region): Delete.
	(region_model::add_region_for_type): Delete.
	(region_model::get_svalue): Delete.
	(region_model::get_region): Delete.
	(region_model::get_lvalue): Convert from region_id to
	const region *.
	(region_model::get_rvalue): Convert from svalue_id to
	const svalue *.
	(region_model::get_or_create_ptr_svalue): Delete.
	(region_model::get_or_create_constant_svalue): Delete.
	(region_model::get_svalue_for_fndecl): Delete.
	(region_model::get_svalue_for_label): Delete.
	(region_model::get_region_for_fndecl): Delete.
	(region_model::get_region_for_label): Delete.
	(region_model::get_frame_at_index (int index) const;): New.
	(region_model::maybe_cast): Delete.
	(region_model::maybe_cast_1): Delete.
	(region_model::get_field_region): Delete.
	(region_model::id deref_rvalue): Convert from region_id and
	svalue_id to const region * and const svalue *.  Drop overload,
	passing in both a tree and an svalue.
	(region_model::set_value): Convert from region_id and svalue_id to
	const region * and const svalue *.
	(region_model::set_to_new_unknown_value): Delete.
	(region_model::clobber_region (const region *reg);): New.
	(region_model::purge_region (const region *reg);): New.
	(region_model::zero_fill_region (const region *reg);): New.
	(region_model::mark_region_as_unknown (const region *reg);): New.
	(region_model::copy_region): Convert from region_id to
	const region *.
	(region_model::eval_condition): Convert from svalue_id to
	const svalue *.
	(region_model::eval_condition_without_cm): Likewise.
	(region_model::compare_initial_and_pointer): New.
	(region_model:maybe_get_constant): Delete.
	(region_model::add_new_malloc_region): Delete.
	(region_model::get_representative_tree): Convert from svalue_id to
	const svalue *.
	(region_model::get_representative_path_var): Delete decl taking a
	region_id in favor of two decls, for svalue vs region, with an
	svalue_set to ensure termination.
	(region_model::get_path_vars_for_svalue): Delete.
	(region_model::create_region_for_heap_alloc): New.
	(region_model::create_region_for_alloca): New.
	(region_model::purge_unused_svalues): Delete.
	(region_model::remap_svalue_ids): Delete.
	(region_model::remap_region_ids): Delete.
	(region_model::purge_regions): Delete.
	(region_model::get_num_svalues): Delete.
	(region_model::get_num_regions): Delete.
	(region_model::get_descendents): Delete.
	(region_model::get_store): New.
	(region_model::delete_region_and_descendents): Delete.
	(region_model::get_manager): New.
	(region_model::unbind_region_and_descendents): New.
	(region_model::can_merge_with_p): Add point param.  Drop
	svalue_id_merger_mapping.
	(region_model::get_value_by_name): Delete.
	(region_model::convert_byte_offset_to_array_index): Delete.
	(region_model::get_or_create_mem_ref): Delete.
	(region_model::get_or_create_pointer_plus_expr): Delete.
	(region_model::get_or_create_view): Delete.
	(region_model::get_lvalue_1): Convert from region_id to
	const region *.
	(region_model::get_rvalue_1): Convert from svalue_id to
	const svalue *.
	(region_model::get_ssa_name_regions_for_current_frame): New.
	(region_model::append_ssa_names_cb): New.
	(region_model::get_store_value): New.
	(region_model::copy_struct_region): Delete.
	(region_model::copy_union_region): Delete.
	(region_model::copy_array_region): Delete.
	(region_model::region_exists_p): New.
	(region_model::make_region_for_unexpected_tree_code): Delete.
	(region_model::loop_replay_fixup): New.
	(region_model::poison_any_pointers_to_bad_regions): Delete.
	(region_model::poison_any_pointers_to_descendents): New.
	(region_model::dump_summary_of_rep_path_vars): Delete.
	(region_model::on_top_level_param): New.
	(region_model::record_dynamic_extents): New.
	(region_model::m_mgr;): New.
	(region_model::m_store;): New.
	(region_model::m_svalues;): Delete.
	(region_model::m_regions;): Delete.
	(region_model::m_root_rid;): Delete.
	(region_model::m_current_frame;): New.
	(region_model_context::remap_svalue_ids): Delete.
	(region_model_context::can_purge_p): Delete.
	(region_model_context::on_svalue_leak): New.
	(region_model_context::on_svalue_purge): Delete.
	(region_model_context::on_liveness_change): New.
	(region_model_context::on_inherited_svalue): Delete.
	(region_model_context::on_cast): Delete.
	(region_model_context::on_unknown_change): Convert from svalue_id to
	const svalue * and add is_mutable.
	(class noop_region_model_context): Update for region_model_context
	changes.
	(model_merger::model_merger): Add program_point.  Drop
	svalue_id_merger_mapping.
	(model_merger::dump_to_pp): Add "simple" param.
	(model_merger::dump): Likewise.
	(model_merger::get_region_a): Delete.
	(model_merger::get_region_b): Delete.
	(model_merger::can_merge_values_p): Delete.
	(model_merger::record_regions): Delete.
	(model_merger::record_svalues): Delete.
	(model_merger::m_point): New field.
	(model_merger::m_map_regions_from_a_to_m): Delete.
	(model_merger::m_map_regions_from_b_to_m): Delete.
	(model_merger::m_sid_mapping): Delete.
	(struct svalue_id_merger_mapping): Delete.
	(class engine): New.
	(struct canonicalization): Delete.
	(inchash::add): Delete decls for hashing svalue_id and region_id.
	(test_region_model_context::on_unexpected_tree_code): Require t to
	be non-NULL.
	(selftest::assert_condition): Add overload comparing a pair of
	const svalue *.
	* sm-file.cc: Include "tristate.h", "selftest.h",
	"analyzer/call-string.h", "analyzer/program-point.h",
	"analyzer/store.h", and "analyzer/region-model.h".
	(fileptr_state_machine::get_default_state): New.
	(fileptr_state_machine::on_stmt): Remove calls to
	get_readable_tree in favor of get_diagnostic_tree.
	* sm-malloc.cc: Include "tristate.h", "selftest.h",
	"analyzer/call-string.h", "analyzer/program-point.h",
	"analyzer/store.h", and "analyzer/region-model.h".
	(malloc_state_machine::get_default_state): New.
	(malloc_state_machine::reset_when_passed_to_unknown_fn_p): New.
	(malloc_diagnostic::describe_state_change): Handle change.m_expr
	being NULL.
	(null_arg::emit): Avoid printing "NULL '0'".
	(null_arg::describe_final_event): Avoid printing "(0) NULL".
	(malloc_leak::emit): Handle m_arg being NULL.
	(malloc_leak::describe_final_event): Handle ev.m_expr being NULL.
	(malloc_state_machine::on_stmt): Don't call get_readable_tree.
	Call get_diagnostic_tree when creating pending diagnostics.
	Update for is_zero_assignment becoming a member function of
	sm_ctxt.
	Don't transition to m_non_heap for ADDR_EXPR(MEM_REF()).
	(malloc_state_machine::reset_when_passed_to_unknown_fn_p): New
	vfunc implementation.
	* sm-sensitive.cc (sensitive_state_machine::warn_for_any_exposure): Call
	get_diagnostic_tree and pass the result to warn_for_state.
	* sm-signal.cc: Move includes of "analyzer/call-string.h" and
	"analyzer/program-point.h" to before "analyzer/region-model.h",
	and also include "analyzer/store.h" before it.
	(signal_unsafe_call::describe_state_change): Use
	get_dest_function to get handler.
	(update_model_for_signal_handler): Pass manager to region_model
	ctor.
	(register_signal_handler::impl_transition): Update for changes to
	get_or_create_node and add_edge.
	* sm-taint.cc (taint_state_machine::on_stmt): Remove calls to
	get_readable_tree, replacing them when calling warn_for_state with
	calls to get_diagnostic_tree.
	* sm.cc (is_zero_assignment): Delete.
	(any_pointer_p): Move to within namespace ana.
	* sm.h (is_zero_assignment): Remove decl.
	(any_pointer_p): Move decl to within namespace ana.
	(state_machine::get_default_state): New vfunc.
	(state_machine::reset_when_passed_to_unknown_fn_p): New vfunc.
	(sm_context::get_readable_tree): Rename to...
	(sm_context::get_diagnostic_tree): ...this.
	(sm_context::is_zero_assignment): New vfunc.
	* store.cc: New file.
	* store.h: New file.
	* svalue.cc: New file.

2020-05-22  Mark Wielaard  <mark@klomp.org>

	* sm-signal.cc(signal_unsafe_call::emit): Possibly add
	gcc_rich_location note for replacement.
	(signal_unsafe_call::get_replacement_fn): New private function.
	(get_async_signal_unsafe_fns): Add "exit".

2020-04-28  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94816
	* engine.cc (impl_region_model_context::on_unexpected_tree_code):
	Handle NULL tree.
	* region-model.cc (region_model::add_region_for_type): Handle
	NULL type.
	* region-model.h
	(test_region_model_context::on_unexpected_tree_code): Handle NULL
	tree.

2020-04-28  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94447
	PR analyzer/94639
	PR analyzer/94732
	PR analyzer/94754
	* analyzer.opt (Wanalyzer-use-of-uninitialized-value): Delete.
	* program-state.cc (selftest::test_program_state_dumping): Update
	expected dump result for removal of "uninit".
	* region-model.cc (poison_kind_to_str): Delete POISON_KIND_UNINIT
	case.
	(root_region::ensure_stack_region): Initialize stack with null
	svalue_id rather than with a typeless POISON_KIND_UNINIT value.
	(root_region::ensure_heap_region): Likewise for the heap.
	(region_model::dump_summary_of_rep_path_vars): Remove
	summarization of uninit values.
	(region_model::validate): Remove check that the stack has a
	POISON_KIND_UNINIT value.
	(poisoned_value_diagnostic::emit): Remove POISON_KIND_UNINIT
	case.
	(poisoned_value_diagnostic::describe_final_event): Likewise.
	(selftest::test_dump): Update expected dump result for removal of
	"uninit".
	(selftest::test_svalue_equality): Remove "uninit" and "freed".
	* region-model.h (enum poison_kind): Remove POISON_KIND_UNINIT.

2020-04-01  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94378
	* checker-path.cc: Include "bitmap.h".
	* constraint-manager.cc: Likewise.
	* diagnostic-manager.cc: Likewise.
	* engine.cc: Likewise.
	(exploded_node::detect_leaks): Pass null region_id to pop_frame.
	* program-point.cc: Include "bitmap.h".
	* program-state.cc: Likewise.
	* region-model.cc (id_set<region_id>::id_set): Convert to...
	(region_id_set::region_id_set): ...this.
	(svalue_id_set::svalue_id_set): New ctor.
	(region_model::copy_region): New function.
	(region_model::copy_struct_region): New function.
	(region_model::copy_union_region): New function.
	(region_model::copy_array_region): New function.
	(stack_region::pop_frame): Drop return value.  Add
	"result_dst_rid" param; if it is non-null, use copy_region to copy
	the result to it.  Rather than capture and pass a single "known
	used" return value to be used by purge_unused_values, instead
	gather and pass a set of known used return values.
	(root_region::pop_frame): Drop return value.  Add "result_dst_rid"
	param.
	(region_model::on_assignment): Use copy_region.
	(region_model::on_return): Likewise for the result.
	(region_model::on_longjmp): Pass null for pop_frame's
	result_dst_rid.
	(region_model::update_for_return_superedge): Pass the region for the
	return value of the call, if any, to pop_frame, rather than setting
	the lvalue for the lhs of the result.
	(region_model::pop_frame): Drop return value.  Add
	"result_dst_rid" param.
	(region_model::purge_unused_svalues): Convert third param from an
	svalue_id * to an svalue_id_set *, updating the initial populating
	of the "used" bitmap accordingly.  Don't remap it when done.
	(struct selftest::coord_test): New selftest fixture, extracted from...
	(selftest::test_dump_2): ...here.
	(selftest::test_compound_assignment): New selftest.
	(selftest::test_stack_frames): Pass null to new param of pop_frame.
	(selftest::analyzer_region_model_cc_tests): Call the new selftest.
	* region-model.h (class id_set): Delete template.
	(class region_id_set): Reimplement, using old id_set implementation.
	(class svalue_id_set): Likewise.  Convert from auto_sbitmap to
	auto_bitmap.
	(region::get_active_view): New accessor.
	(stack_region::pop_frame): Drop return value.  Add
	"result_dst_rid" param.
	(root_region::pop_frame): Likewise.
	(region_model::pop_frame): Likewise.
	(region_model::copy_region): New decl.
	(region_model::purge_unused_svalues): Convert third param from an
	svalue_id * to an svalue_id_set *.
	(region_model::copy_struct_region): New decl.
	(region_model::copy_union_region): New decl.
	(region_model::copy_array_region): New decl.

2020-03-27  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (selftest::test_program_state_dumping): Update
	expected dump to include symbolic_region's possibly_null field.
	* region-model.cc (symbolic_region::print_fields): New vfunc
	implementation.
	(region_model::add_constraint): Clear m_possibly_null from
	symbolic_regions now known to be non-NULL.
	(selftest::test_malloc_constraints): New selftest.
	(selftest::analyzer_region_model_cc_tests): Call it.
	* region-model.h (region::dyn_cast_symbolic_region): Add non-const
	overload.
	(symbolic_region::dyn_cast_symbolic_region): Implement it.
	(symbolic_region::print_fields): New vfunc override decl.

2020-03-27  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (class feasibility_problem): New forward decl.
	* diagnostic-manager.cc (saved_diagnostic::saved_diagnostic):
	Initialize new fields m_status, m_epath_length, and m_problem.
	(saved_diagnostic::~saved_diagnostic): Delete m_problem.
	(dedupe_candidate::dedupe_candidate): Convert "sd" param from a
	const ref to a mutable ptr.
	(dedupe_winners::add): Convert "sd" param from a const ref to a
	mutable ptr.  Record the length of the exploded_path.  Record the
	feasibility/infeasibility of sd into sd, capturing a
	feasibility_problem when feasible_p fails, and storing it in sd.
	(diagnostic_manager::emit_saved_diagnostics): Update for pass by
	ptr rather than by const ref.
	* diagnostic-manager.h (class saved_diagnostic): Add new enum
	status.  Add fields m_status, m_epath_length and m_problem.
	(saved_diagnostic::set_feasible): New member function.
	(saved_diagnostic::set_infeasible): New member function.
	(saved_diagnostic::get_feasibility_problem): New accessor.
	(saved_diagnostic::get_status): New accessor.
	(saved_diagnostic::set_epath_length): New member function.
	(saved_diagnostic::get_epath_length): New accessor.
	* engine.cc: Include "gimple-pretty-print.h".
	(exploded_path::feasible_p): Add OUT param and, if non-NULL, write
	a new feasibility_problem to it on failure.
	(viz_callgraph_node::dump_dot): Convert begin_tr calls to
	begin_trtd.  Convert end_tr calls to end_tdtr.
	(class exploded_graph_annotator): New subclass of dot_annotator.
	(impl_run_checkers): Add a second -fdump-analyzer-supergraph dump
	after the analysis runs, using exploded_graph_annotator. dumping
	to DUMP_BASE_NAME.supergraph-eg.dot.
	* exploded-graph.h (exploded_node::get_dot_fillcolor): Make
	public.
	(exploded_path::feasible_p): Add OUT param.
	(class feasibility_problem): New class.
	* state-purge.cc (state_purge_annotator::add_node_annotations):
	Return a bool, add a "within_table" param.
	(print_vec_of_names): Convert begin_tr calls to begin_trtd.
	Convert end_tr calls to end_tdtr.
	(state_purge_annotator::add_stmt_annotations): Add "within_row"
	param.
	* state-purge.h ((state_purge_annotator::add_node_annotations):
	Return a bool, add a "within_table" param.
	(state_purge_annotator::add_stmt_annotations): Add "within_row"
	param.
	* supergraph.cc (supernode::dump_dot): Call add_node_annotations
	twice: as before, passing false for "within_table", then again
	with true when within the TABLE element.  Convert some begin_tr
	calls to begin_trtd, and some end_tr calls to end_tdtr.
	Repeat each add_stmt_annotations call, distinguishing between
	calls that add TRs and those that add TDs to an existing TR.
	Add a call to add_after_node_annotations.
	* supergraph.h (dot_annotator::add_node_annotations): Add a
	"within_table" param.
	(dot_annotator::add_stmt_annotations): Add a "within_row" param.
	(dot_annotator::add_after_node_annotations): New vfunc.

2020-03-27  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (dedupe_winners::add): Show the
	exploded_node index in the log messages.
	(diagnostic_manager::emit_saved_diagnostics): Log a summary of
	m_saved_diagnostics at entry.

2020-03-27  David Malcolm  <dmalcolm@redhat.com>

	* supergraph.cc (superedge::dump): Add space before description;
	move newline to non-pretty_printer overload.

2020-03-18  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc: Include "stor-layout.h".
	(region_model::dump_to_pp): Rather than calling
	dump_summary_of_map on each of the current frame and the globals,
	instead get a vec of representative path_vars for all regions,
	and then dump a summary of all of them.
	(region_model::dump_summary_of_map): Delete, rewriting into...
	(region_model::dump_summary_of_rep_path_vars): ...this new
	function, working on a vec of path_vars.
	(region_model::set_value): New overload.
	(region_model::get_representative_path_var): Rename
	"parent_region" local to "parent_reg" and consolidate with other
	local.  Guard test for grandparent being stack on parent_reg being
	non-NULL.  Move handling for parent being an array_region to
	within guard for parent_reg being non-NULL.
	(selftest::make_test_compound_type): New function.
	(selftest::test_dump_2): New selftest.
	(selftest::test_dump_3): New selftest.
	(selftest::test_stack_frames): Update expected output from
	simplified dump to show "a" and "b" from parent frame and "y" in
	child frame.
	(selftest::analyzer_region_model_cc_tests): Call test_dump_2 and
	test_dump_3.
	* region-model.h (region_model::set_value): New overload decl.
	(region_model::dump_summary_of_map): Delete.
	(region_model::dump_summary_of_rep_path_vars): New.

2020-03-18  David Malcolm  <dmalcolm@redhat.com>

	* region-model.h (class noop_region_model_context): New subclass
	of region_model_context.
	(class tentative_region_model_context): Inherit from
	noop_region_model_context rather than from region_model_context;
	drop redundant vfunc implementations.
	(class test_region_model_context): Likewise.

2020-03-18  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::exploded_node): Move implementation
	here from header; accept point_and_state by const reference rather
	than by value.
	* exploded-graph.h (exploded_node::exploded_node): Pass
	point_and_state by const reference rather than by value.  Move
	body to engine.cc.

2020-03-18  Jakub Jelinek  <jakub@redhat.com>

	* sm-malloc.cc (malloc_state_machine::on_stmt): Fix up duplicated word
	issue in a comment.
	* region-model.cc (region_model::make_region_for_unexpected_tree_code,
	region_model::delete_region_and_descendents): Likewise.
	* engine.cc (class exploded_cluster): Likewise.
	* diagnostic-manager.cc (class path_builder): Likewise.

2020-03-13  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94099
	PR analyzer/94105
	* diagnostic-manager.cc (for_each_state_change): Bulletproof
	against errors in get_rvalue by passing a
	tentative_region_model_context and rejecting if there's an error.
	* region-model.cc (region_model::get_lvalue_1): When handling
	ARRAY_REF, handle results of error-handling.  Handle NOP_EXPR.

2020-03-06  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (class array_region): New forward decl.
	* program-state.cc (selftest::test_program_state_dumping_2): New.
	(selftest::analyzer_program_state_cc_tests): Call it.
	* region-model.cc (array_region::constant_from_key): New.
	(region_model::get_representative_tree): Handle region_svalue by
	generating an ADDR_EXPR.
	(region_model::get_representative_path_var): In view handling,
	remove erroneous TREE_TYPE when determining the type of the tree.
	Handle array regions and STRING_CST.
	(selftest::assert_dump_tree_eq): New.
	(ASSERT_DUMP_TREE_EQ): New macro.
	(selftest::test_get_representative_tree): New selftest.
	(selftest::analyzer_region_model_cc_tests): Call it.
	* region-model.h (region::dyn_cast_array_region): New vfunc.
	(array_region::dyn_cast_array_region): New vfunc implementation.
	(array_region::constant_from_key): New decl.

2020-03-06  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (dump_quoted_tree): New decl.
	* engine.cc (exploded_node::dump_dot): Pass region model to
	sm_state_map::print.
	* program-state.cc: Include diagnostic-core.h.
	(sm_state_map::print): Add "model" param and use it to print
	representative trees.  Only print origin information if non-null.
	(sm_state_map::dump): Pass NULL for model to print call.
	(program_state::print): Pass region model to sm_state_map::print.
	(program_state::dump_to_pp): Use spaces rather than newlines when
	summarizing.  Pass region_model to sm_state_map::print.
	(ana::selftest::assert_dump_eq): New function.
	(ASSERT_DUMP_EQ): New macro.
	(ana::selftest::test_program_state_dumping): New function.
	(ana::selftest::analyzer_program_state_cc_tests): Call it.
	* program-state.h (program_state::print): Add model param.
	* region-model.cc (dump_quoted_tree): New function.
	(map_region::print_fields): Use dump_quoted_tree rather than
	%qE to avoid lang-dependent output.
	(map_region::dump_child_label): Likewise.
	(region_model::dump_summary_of_map): For SK_REGION, when
	get_representative_path_var fails, print the region id rather than
	erroneously printing NULL.
	* sm.cc (state_machine::get_state_by_name): New function.
	* sm.h (state_machine::get_state_by_name): New decl.

2020-03-04  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region::validate): Convert model param from ptr
	to reference.  Update comment to reflect that it's now a vfunc.
	(map_region::validate): New vfunc implementation.
	(array_region::validate): New vfunc implementation.
	(stack_region::validate): New vfunc implementation.
	(root_region::validate): New vfunc implementation.
	(region_model::validate): Pass a reference rather than a pointer
	to the region::validate vfunc.
	* region-model.h (region::validate): Make virtual.  Convert model
	param from ptr to reference.
	(map_region::validate): New vfunc decl.
	(array_region::validate): New vfunc decl.
	(stack_region::validate): New vfunc decl.
	(root_region::validate): New vfunc decl.

2020-03-04  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93993
	* region-model.cc (region_model::on_call_pre): Handle
	BUILT_IN_EXPECT and its variants.
	(region_model::add_any_constraints_from_ssa_def_stmt): Split out
	gassign handling into add_any_constraints_from_gassign; add gcall
	handling.
	(region_model::add_any_constraints_from_gassign): New function,
	based on the above.  Add handling for NOP_EXPR.
	(region_model::add_any_constraints_from_gcall): New function.
	(region_model::get_representative_path_var): Handle views.
	* region-model.h
	(region_model::add_any_constraints_from_ssa_def_stmt): New decl.
	(region_model::add_any_constraints_from_gassign): New decl.

2020-03-04  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93993
	* checker-path.h (state_change_event::get_lvalue): Add ctxt param
	and pass it to region_model::get_value call.
	* diagnostic-manager.cc (get_any_origin): Pass a
	tentative_region_model_context to the calls to get_lvalue and reject
	the comparison if errors occur.
	(can_be_expr_of_interest_p): New function.
	(diagnostic_manager::prune_for_sm_diagnostic): Replace checks for
	CONSTANT_CLASS_P with calls to update_for_unsuitable_sm_exprs.
	Pass a tentative_region_model_context to the calls to
	state_change_event::get_lvalue and reject the comparison if errors
	occur.
	(diagnostic_manager::update_for_unsuitable_sm_exprs): New.
	* diagnostic-manager.h
	(diagnostic_manager::update_for_unsuitable_sm_exprs): New decl.
	* region-model.h (class tentative_region_model_context): New class.

2020-03-04  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (worklist::worklist): Remove unused field m_eg.
	(class viz_callgraph_edge): Remove unused field m_call_sedge.
	(class viz_callgraph): Remove unused field m_sg.
	* exploded-graph.h (worklist::::m_eg): Remove unused field.

2020-03-02  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.opt (fanalyzer-show-duplicate-count): New option.
	* diagnostic-manager.cc
	(diagnostic_manager::emit_saved_diagnostic): Use the above to
	guard the printing of the duplicate count.

2020-03-02  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93959
	* analyzer.cc (is_std_function_p): New function.
	(is_std_named_call_p): New functions.
	* analyzer.h (is_std_named_call_p): New decl.
	* sm-malloc.cc (malloc_state_machine::on_stmt): Check for "std::"
	variants when checking for malloc, calloc and free.

2020-02-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93950
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic): Assert that var is
	either NULL or not a constant.  When updating var, bulletproof
	against constant values.

2020-02-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93947
	* region-model.cc (region_model::get_fndecl_for_call): Gracefully
	fail for fn_decls that don't have a cgraph_node.

2020-02-26  David Malcolm  <dmalcolm@redhat.com>

	* bar-chart.cc: New file.
	* bar-chart.h: New file.
	* engine.cc: Include "analyzer/bar-chart.h".
	(stats::log): Only log the m_num_nodes kinds that are non-zero.
	(stats::dump): Likewise when dumping.
	(stats::get_total_enodes): New.
	(exploded_graph::get_or_create_node): Increment the per-point-data
	m_excess_enodes when hitting the per-program-point limit on
	enodes.
	(exploded_graph::print_bar_charts): New.
	(exploded_graph::log_stats): Log the number of unprocessed enodes
	in the worklist.  Call print_bar_charts.
	(exploded_graph::dump_stats): Print the number of unprocessed
	enodes in the worklist.
	* exploded-graph.h (stats::get_total_enodes): New decl.
	(struct per_program_point_data): Add field m_excess_enodes.
	(exploded_graph::print_bar_charts): New decl.
	* supergraph.cc (superedge::dump): New.
	(superedge::dump): New.
	* supergraph.h (supernode::get_function): New.
	(superedge::dump): New decl.
	(superedge::dump): New decl.

2020-02-24  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_graph::get_or_create_node): Dump the
	program_state to the pp, rather than to stderr.

2020-02-24  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93032
	* sm.cc (make_checkers): Require the "taint" checker to be
	explicitly enabled.

2020-02-24  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93899
	* engine.cc
	(impl_region_model_context::impl_region_model_context): Add logger
	param.
	* engine.cc (exploded_graph::add_function_entry): Create an
	impl_region_model_context and pass it to the push_frame call.
	Bail if the resulting state is invalid.
	(exploded_graph::build_initial_worklist): Likewise.
	(exploded_graph::build_initial_worklist): Handle the case where
	add_function_entry fails.
	* exploded-graph.h
	(impl_region_model_context::impl_region_model_context): Add logger
	param.
	* region-model.cc (map_region::get_or_create): Add ctxt param and
	pass it to add_region_for_type.
	(map_region::can_merge_p): Pass NULL as a ctxt to call to
	get_or_create.
	(array_region::get_element): Pass ctxt to call to get_or_create.
	(array_region::get_or_create): Add ctxt param and pass it to
	add_region_for_type.
	(root_region::push_frame): Pass ctxt to get_or_create calls.
	(region_model::get_lvalue_1): Likewise.
	(region_model::make_region_for_unexpected_tree_code): Assert that
	ctxt is non-NULL.
	(region_model::get_rvalue_1): Pass ctxt to get_svalue_for_fndecl
	and get_svalue_for_label calls.
	(region_model::get_svalue_for_fndecl): Add ctxt param and pass it
	to get_region_for_fndecl.
	(region_model::get_region_for_fndecl): Add ctxt param and pass it
	to get_or_create.
	(region_model::get_svalue_for_label): Add ctxt param and pass it
	to get_region_for_label.
	(region_model::get_region_for_label): Add ctxt param and pass it
	to get_region_for_fndecl and get_or_create.
	(region_model::get_field_region): Add ctxt param and pass it to
	get_or_create_view and get_or_create.
	(make_region_for_type): Replace gcc_unreachable with return NULL.
	(region_model::add_region_for_type): Add ctxt param.  Handle a
	return of NULL from make_region_for_type by calling
	make_region_for_unexpected_tree_code.
	(region_model::get_or_create_mem_ref): Pass ctxt to calls to
	get_or_create_view.
	(region_model::get_or_create_view): Add ctxt param and pass it to
	add_region_for_type.
	(selftest::test_state_merging): Pass ctxt to get_or_create_view.
	* region-model.h (region_model::get_or_create): Add ctxt param.
	(region_model::add_region_for_type): Likewise.
	(region_model::get_svalue_for_fndecl): Likewise.
	(region_model::get_svalue_for_label): Likewise.
	(region_model::get_region_for_fndecl): Likewise.
	(region_model::get_region_for_label): Likewise.
	(region_model::get_field_region): Likewise.
	(region_model::get_or_create_view): Likewise.

2020-02-24  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (superedge_event::should_filter_p): Update
	filter for empty descriptions to cover verbosity level 3 as well
	as 2.
	* diagnostic-manager.cc: Include "analyzer/reachability.h".
	(class path_builder): New class.
	(diagnostic_manager::emit_saved_diagnostic): Create a path_builder
	and pass it to build_emission_path, rather passing eg; similarly
	for add_events_for_eedge and ext_state.
	(diagnostic_manager::build_emission_path): Replace "eg" param
	with a path_builder, pass it to add_events_for_eedge.
	(diagnostic_manager::add_events_for_eedge): Replace ext_state
	param with path_builder; pass it to add_events_for_superedge.
	(diagnostic_manager::significant_edge_p): New.
	(diagnostic_manager::add_events_for_superedge): Add path_builder
	param.  Reject insignificant edges at verbosity levels below 3.
	(diagnostic_manager::prune_for_sm_diagnostic): Update highest
	verbosity level to 4.
	* diagnostic-manager.h (class path_builder): New forward decl.
	(diagnostic_manager::build_emission_path): Replace "eg" param
	with a path_builder.
	(diagnostic_manager::add_events_for_eedge): Replace ext_state
	param with path_builder.
	(diagnostic_manager::significant_edge_p): New.
	(diagnostic_manager::add_events_for_superedge): Add path_builder
	param.
	* reachability.h: New file.

2020-02-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93692
	* analyzer.opt (fdump-analyzer-callgraph): Rewrite description.

2020-02-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93777
	* region-model.cc (region_model::maybe_cast_1): Replace assertion
	that build_cast returns non-NULL with a conditional, falling
	through to the logic which returns a new unknown value of the
	desired type if it fails.

2020-02-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93778
	* engine.cc (impl_region_model_context::on_unknown_tree_code):
	Rename to...
	(impl_region_model_context::on_unexpected_tree_code): ...this and
	convert first argument from path_var to tree.
	(exploded_node::on_stmt): Pass ctxt to purge_for_unknown_fncall.
	* exploded-graph.h (region_model_context::on_unknown_tree_code):
	Rename to...
	(region_model_context::on_unexpected_tree_code): ...this and
	convert first argument from path_var to tree.
	* program-state.cc (sm_state_map::purge_for_unknown_fncall): Add
	ctxt param and pass on to calls to get_rvalue.
	* program-state.h (sm_state_map::purge_for_unknown_fncall): Add
	ctxt param.
	* region-model.cc (region_model::handle_unrecognized_call): Pass
	ctxt on to call to get_rvalue.
	(region_model::get_lvalue_1): Move body of default case to
	region_model::make_region_for_unexpected_tree_code and call it.
	Within COMPONENT_REF case, reject attempts to handle types other
	than RECORD_TYPE and UNION_TYPE.
	(region_model::make_region_for_unexpected_tree_code): New
	function, based on default case of region_model::get_lvalue_1.
	* region-model.h
	(region_model::make_region_for_unexpected_tree_code): New decl.
	(region_model::on_unknown_tree_code): Rename to...
	(region_model::on_unexpected_tree_code): ...this and convert first
	argument from path_var to tree.
	(class test_region_model_context): Update vfunc implementation for
	above change.

2020-02-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93774
	* region-model.cc
	(region_model::convert_byte_offset_to_array_index): Use
	int_size_in_bytes before calling size_in_bytes, to gracefully fail
	on incomplete types.

2020-02-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93775
	* region-model.cc (region_model::get_fndecl_for_call): Handle the
	case where the code_region's get_tree_for_child_region returns
	NULL.

2020-02-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93388
	* engine.cc (impl_region_model_context::on_unknown_tree_code):
	New.
	(exploded_graph::get_or_create_node): Reject invalid states.
	* exploded-graph.h
	(impl_region_model_context::on_unknown_tree_code): New decl.
	(point_and_state::point_and_state): Assert that the state is
	valid.
	* program-state.cc (program_state::program_state): Initialize
	m_valid to true.
	(program_state::operator=): Copy m_valid.
	(program_state::program_state): Likewise for move constructor.
	(program_state::print): Print m_valid.
	(program_state::dump_to_pp): Likewise.
	* program-state.h (program_state::m_valid): New field.
	* region-model.cc (region_model::get_lvalue_1): Implement the
	default case by returning a new symbolic region and calling
	the context's on_unknown_tree_code, rather than issuing an
	internal_error.  Implement VIEW_CONVERT_EXPR.
	* region-model.h (region_model_context::on_unknown_tree_code): New
	vfunc.
	(test_region_model_context::on_unknown_tree_code): New.

2020-02-17  David Malcolm  <dmalcolm@redhat.com>

	* sm-malloc.cc (malloc_diagnostic::describe_state_change): For
	transition to the "null" state, only say "assuming" when
	transitioning from the "unchecked" state.

2020-02-17  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.h (diagnostic_manager::get_saved_diagnostic):
	Add const overload.
	* engine.cc (exploded_node::dump_dot): Dump saved_diagnostics.
	* exploded-graph.h (exploded_graph::get_diagnostic_manager): Add
	const overload.

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93288
	* analysis-plan.cc (analysis_plan::use_summary_p): Look through
	the ultimate_alias_target when getting the called function.
	* engine.cc (exploded_node::on_stmt): Rename second "ctxt" to
	"sm_ctxt".  Use the region_model's get_fndecl_for_call rather than
	gimple_call_fndecl.
	* region-model.cc (region_model::get_fndecl_for_call): Use
	ultimate_alias_target on fndecl.
	* supergraph.cc (get_ultimate_function_for_cgraph_edge): New
	function.
	(supergraph_call_edge): Use it when rejecting edges without
	functions.
	(supergraph::supergraph): Use it to get the function for the
	cgraph_edge when building interprocedural superedges.
	(callgraph_superedge::get_callee_function):  Use it.
	* supergraph.h (supergraph::get_num_snodes): Make param const.
	(supergraph::function_to_num_snodes_t): Make first type param
	const.

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93374
	* engine.cc (exploded_edge::exploded_edge): Add ext_state param
	and pass it to change.validate.
	(exploded_graph::get_or_create_node): Move purging of change
	svalues to also cover the case of reusing an existing enode.
	(exploded_graph::add_edge): Pass m_ext_state to exploded_edge's
	ctor.
	* exploded-graph.h (exploded_edge::exploded_edge): Add ext_state
	param.
	* program-state.cc (state_change::sm_change::validate): Likewise.
	Assert that m_sm_idx is sane.  Use ext_state to validate
	m_old_state and m_new_state.
	(state_change::validate): Add ext_state param and pass it to
	the sm_change validate calls.
	* program-state.h (state_change::sm_change::validate): Add
	ext_state param.
	(state_change::validate): Likewise.

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93669
	* engine.cc (exploded_graph::dump_exploded_nodes): Handle missing
	case of STATUS_WORKLIST in implementation of
	"__analyzer_dump_exploded_nodes".

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93649
	* constraint-manager.cc (constraint_manager::add_constraint): When
	merging equivalence classes and updating m_constant, also update
	m_cst_sid.
	(constraint_manager::validate): If m_constant is non-NULL assert
	that m_cst_sid is non-null and is valid.

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93657
	* analyzer.opt (fdump-analyzer): Reword description.
	(fdump-analyzer-stderr): Likewise.

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (print_quoted_type): New function.
	(svalue::print): Use it to replace %qT.
	(region::dump_to_pp): Likewise.
	(region::dump_child_label): Likewise.
	(region::print_fields): Likewise.

2020-02-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93659
	* analyzer.opt (-param=analyzer-max-recursion-depth=): Fix "tha"
	-> "that" typo.
	(Wanalyzer-use-of-uninitialized-value): Fix "initialized" ->
	"uninitialized" typo.

2020-02-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93350
	* region-model.cc (region_model::get_lvalue_1):
	Handle BIT_FIELD_REF.
	(make_region_for_type): Handle VECTOR_TYPE.

2020-02-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93647
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic): Bulletproof against
	VAR being constant.
	* region-model.cc (region_model::get_lvalue_1): Provide a better
	error message when encountering an unhandled tree code.

2020-02-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93405
	* region-model.cc (region_model::get_lvalue_1): Implement
	CONST_DECL.

2020-02-06  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::maybe_cast_1): Attempt to provide
	a region_svalue if either type is a pointer, rather than if both
	types are pointers.

2020-02-05  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::dump_dot): Show merger enodes.
	(worklist::add_node): Assert that the node's m_status is
	STATUS_WORKLIST.
	(exploded_graph::process_worklist): Likewise for nodes from the
	worklist.  Set status of merged nodes to STATUS_MERGER.
	(exploded_graph::process_node): Set status of node to
	STATUS_PROCESSED.
	(exploded_graph::dump_exploded_nodes): Rework handling of
	"__analyzer_dump_exploded_nodes", splitting enodes by status into
	"processed" and "merger", showing the count of just the processed
	enodes at the call, rather than the count of all enodes.
	* exploded-graph.h (exploded_node::status): New enum.
	(exploded_node::exploded_node): Initialize m_status to
	STATUS_WORKLIST.
	(exploded_node::get_status): New getter.
	(exploded_node::set_status): New setter.

2020-02-04  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93543
	* engine.cc (pod_hash_traits<function_call_string>::mark_empty):
	Eliminate reinterpret_cast.
	(pod_hash_traits<function_call_string>::is_empty): Likewise.

2020-02-03  David Malcolm  <dmalcolm@redhat.com>

	* constraint-manager.cc (range::constrained_to_single_element):
	Replace fold_build2 with fold_binary.  Remove unnecessary newline.
	(constraint_manager::get_or_add_equiv_class): Replace fold_build2
	with fold_binary in two places, and remove out-of-date comment.
	(constraint_manager::eval_condition): Replace fold_build2 with
	fold_binary.
	* region-model.cc (constant_svalue::eval_condition): Likewise.
	(region_model::on_assignment): Likewise.

2020-02-03  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93544
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic): Bulletproof
	against bad choices due to bad paths.
	* engine.cc (impl_region_model_context::on_phi): New.
	* exploded-graph.h (impl_region_model_context::on_phi): New decl.
	* region-model.cc (region_model::on_longjmp): Likewise.
	(region_model::handle_phi): Add phi param.  Call the ctxt's on_phi
	vfunc.
	(region_model::update_for_phis): Pass phi to handle_phi.
	* region-model.h (region_model::handle_phi): Add phi param.
	(region_model_context::on_phi): New vfunc.
	(test_region_model_context::on_phi): New.
	* sm-malloc.cc (malloc_state_machine::on_phi): New.
	(malloc_state_machine::on_zero_assignment): New.
	* sm.h (state_machine::on_phi): New vfunc.

2020-02-03  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (supernode_cluster::dump_dot): Show BB index as
	well as SN index.
	* supergraph.cc (supernode::dump_dot): Likewise.

2020-02-03  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93546
	* region-model.cc (region_model::on_call_pre): Update for new
	param of symbolic_region ctor.
	(region_model::deref_rvalue): Likewise.
	(region_model::add_new_malloc_region): Likewise.
	(make_region_for_type): Likewise, preserving type.
	* region-model.h (symbolic_region::symbolic_region): Add "type"
	param and pass it to base class ctor.

2020-02-03  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93547
	* constraint-manager.cc
	(constraint_manager::get_or_add_equiv_class): Ensure types are
	compatible before comparing constants.

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93457
	* region-model.cc (make_region_for_type): Use VOID_TYPE_P rather
	than checking against void_type_node.

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93373
	* region-model.cc (ASSERT_COMPAT_TYPES): Convert to...
	(assert_compat_types): ...this, and bail when either type is NULL,
	or when VOID_TYPE_P (dst_type).
	(region_model::get_lvalue): Update for above conversion.
	(region_model::get_rvalue): Likewise.

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93379
	* region-model.cc (region_model::update_for_return_superedge):
	Move check for null result so that it also guards setting the
	lhs.

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93438
	* region-model.cc (stack_region::can_merge_p): Split into a two
	pass approach, creating all stack regions first, then populating
	them.
	(selftest::test_state_merging): Add test coverage for (a) the case
	of self-merging a model in which a local in an older stack frame
	points to a local in a more recent stack frame (which previously
	would ICE), and (b) the case of self-merging a model in which a
	local points to a global (which previously worked OK).

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.cc (is_named_call_p): Replace tests for fndecl being
	extern at file scope and having a non-NULL DECL_NAME with a call
	to maybe_special_function_p.
	* function-set.cc (function_set::contains_decl_p): Add call to
	maybe_special_function_p.

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93450
	* constraint-manager.cc
	(constraint_manager::get_or_add_equiv_class): Only compare constants
	if their types are compatible.
	* region-model.cc (constant_svalue::eval_condition): Replace check
	for identical types with call to types_compatible_p.

2020-01-30  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (extrinsic_state::dump_to_pp): New.
	(extrinsic_state::dump_to_file): New.
	(extrinsic_state::dump): New.
	* program-state.h (extrinsic_state::dump_to_pp): New decl.
	(extrinsic_state::dump_to_file): New decl.
	(extrinsic_state::dump): New decl.
	* sm.cc: Include "pretty-print.h".
	(state_machine::dump_to_pp): New.
	* sm.h (state_machine::dump_to_pp): New decl.

2020-01-30  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (for_each_state_change): Use
	extrinsic_state::get_num_checkers rather than accessing m_checkers
	directly.
	* program-state.cc (program_state::program_state): Likewise.
	* program-state.h (extrinsic_state::m_checkers): Make private.

2020-01-30  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93356
	* region-model.cc (region_model::eval_condition): In both
	overloads, bail out immediately on floating-point types.
	(region_model::eval_condition_without_cm): Likewise.
	(region_model::add_constraint): Likewise.

2020-01-30  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93450
	* program-state.cc (sm_state_map::set_state): For the overload
	taking an svalue_id, bail out if the set_state on the ec does
	nothing.  Convert the latter's return type from void to bool,
	returning true if anything changed.
	(sm_state_map::impl_set_state): Convert the return type from void
	to bool, returning true if the state changed.
	* program-state.h (sm_state_map::set_state): Convert return type
	from void to bool.
	(sm_state_map::impl_set_state): Likewise.
	* region-model.cc (constant_svalue::eval_condition): Only call
	fold_build2 if the types are the same.

2020-01-29  Jakub Jelinek  <jakub@redhat.com>

	* analyzer.h (PUSH_IGNORE_WFORMAT, POP_IGNORE_WFORMAT): Remove.
	* constraint-manager.cc: Include diagnostic-core.h before graphviz.h.
	(range::dump, equiv_class::print): Don't use PUSH_IGNORE_WFORMAT or
	POP_IGNORE_WFORMAT.
	* state-purge.cc: Include diagnostic-core.h before
	gimple-pretty-print.h.
	(state_purge_annotator::add_node_annotations, print_vec_of_names):
	Don't use PUSH_IGNORE_WFORMAT or POP_IGNORE_WFORMAT.
	* region-model.cc: Move diagnostic-core.h include before graphviz.h.
	(path_var::dump, svalue::print, constant_svalue::print_details,
	region::dump_to_pp, region::dump_child_label, region::print_fields,
	map_region::print_fields, map_region::dump_dot_to_pp,
	map_region::dump_child_label, array_region::print_fields,
	array_region::dump_dot_to_pp): Don't use PUSH_IGNORE_WFORMAT or
	POP_IGNORE_WFORMAT.

2020-01-28  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93316
	* engine.cc (rewind_info_t::update_model): Get the longjmp call
	stmt via get_longjmp_call () rather than assuming it is the last
	stmt in the longjmp's supernode.
	(rewind_info_t::add_events_to_path): Get the location_t for the
	rewind_from_longjmp_event via get_longjmp_call () rather than from
	the supernode's get_end_location ().

2020-01-28  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (poisoned_value_diagnostic::emit): Update for
	renaming of warning_at overload to warning_meta.
	* sm-file.cc (file_leak::emit): Likewise.
	* sm-malloc.cc (double_free::emit): Likewise.
	(possible_null_deref::emit): Likewise.
	(possible_null_arg::emit): Likewise.
	(null_deref::emit): Likewise.
	(null_arg::emit): Likewise.
	(use_after_free::emit): Likewise.
	(malloc_leak::emit): Likewise.
	(free_of_non_heap::emit): Likewise.
	* sm-sensitive.cc (exposure_through_output_file::emit): Likewise.
	* sm-signal.cc (signal_unsafe_call::emit): Likewise.
	* sm-taint.cc (tainted_array_index::emit): Likewise.

2020-01-27  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93451
	* region-model.cc (tree_cmp): For the REAL_CST case, impose an
	arbitrary order on NaNs relative to other NaNs and to non-NaNs;
	const-correctness tweak.
	(ana::selftests::build_real_cst_from_string): New function.
	(ana::selftests::append_interesting_constants): New function.
	(ana::selftests::test_tree_cmp_on_constants): New test.
	(ana::selftests::test_canonicalization_4): New test.
	(ana::selftests::analyzer_region_model_cc_tests): Call the new
	tests.

2020-01-27  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93349
	* engine.cc (run_checkers): Save and restore input_location.

2020-01-27  David Malcolm  <dmalcolm@redhat.com>

	* call-string.cc (call_string::cmp_1): Delete, moving body to...
	(call_string::cmp): ...here.
	* call-string.h (call_string::cmp_1): Delete decl.
	* engine.cc (worklist::key_t::cmp_1): Delete, moving body to...
	(worklist::key_t::cmp): ...here.  Implement hash comparisons
	via comparison rather than subtraction to avoid overflow issues.
	* exploded-graph.h (worklist::key_t::cmp_1): Delete decl.
	* region-model.cc (tree_cmp): Eliminate buggy checking for
	symmetry.

2020-01-27  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.cc  (is_named_call_p): Check that fndecl is "extern"
	and at file scope.  Potentially disregard prefix _ or __ in
	fndecl's name.  Bail if the identifier is NULL.
	(is_setjmp_call_p): Expect a gcall rather than plain gimple.
	Remove special-case check for leading prefix, and also check for
	sigsetjmp.
	(is_longjmp_call_p): Also check for siglongjmp.
	(get_user_facing_name): New function.
	* analyzer.h (is_setjmp_call_p): Expect a gcall rather than plain
	gimple.
	(get_user_facing_name): New decl.
	* checker-path.cc (setjmp_event::get_desc): Use
	get_user_facing_name to avoid hardcoding the function name.
	(rewind_event::rewind_event): Add rewind_info param, using it to
	initialize new m_rewind_info field, and strengthen the assertion.
	(rewind_from_longjmp_event::get_desc): Use get_user_facing_name to
	avoid hardcoding the function name.
	(rewind_to_setjmp_event::get_desc): Likewise.
	* checker-path.h (setjmp_event::setjmp_event): Add setjmp_call
	param and use it to initialize...
	(setjmp_event::m_setjmp_call): New field.
	(rewind_event::rewind_event): Add rewind_info param.
	(rewind_event::m_rewind_info): New protected field.
	(rewind_from_longjmp_event::rewind_from_longjmp_event): Add
	rewind_info param.
	(class rewind_to_setjmp_event): Move rewind_info field to parent
	class.
	* diagnostic-manager.cc (diagnostic_manager::add_events_for_eedge):
	Update setjmp-handling for is_setjmp_call_p requiring a gcall;
	pass the call to the new setjmp_event.
	* engine.cc (exploded_node::on_stmt): Update for is_setjmp_call_p
	requiring a gcall.
	(stale_jmp_buf::emit): Use get_user_facing_name to avoid
	hardcoding the function names.
	(exploded_node::on_longjmp): Pass the longjmp_call when
	constructing rewind_info.
	(rewind_info_t::add_events_to_path): Pass the rewind_info_t to the
	rewind_from_longjmp_event's ctor.
	* exploded-graph.h (rewind_info_t::rewind_info_t): Add
	longjmp_call param.
	(rewind_info_t::get_longjmp_call): New.
	(rewind_info_t::m_longjmp_call): New.
	* region-model.cc (region_model::on_setjmp): Update comment to
	indicate this is also for sigsetjmp.
	* region-model.h (struct setjmp_record): Likewise.
	(class setjmp_svalue): Likewise.

2020-01-27  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93276
	* analyzer.h (PUSH_IGNORE_WFORMAT, POP_IGNORE_WFORMAT): Guard these
	macros with GCC_VERSION >= 4006, making them no-op otherwise.
	* engine.cc (exploded_edge::exploded_edge): Specify template for
	base class initializer.
	(exploded_graph::add_edge): Specify template when chaining up to
	base class add_edge implementation.
	(viz_callgraph_node::dump_dot): Drop redundant "typename".
	(viz_callgraph_edge::viz_callgraph_edge): Specify template for
	base class initializer.
	* program-state.cc (sm_state_map::clone_with_remapping): Drop
	redundant "typename".
	(sm_state_map::print): Likewise.
	(sm_state_map::hash): Likewise.
	(sm_state_map::operator==): Likewise.
	(sm_state_map::remap_svalue_ids): Likewise.
	(sm_state_map::on_svalue_purge): Likewise.
	(sm_state_map::validate): Likewise.
	* program-state.h (sm_state_map::iterator_t): Likewise.
	* supergraph.h (superedge::superedge): Specify template for base
	class initializer.

2020-01-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93375
	* supergraph.cc (callgraph_superedge::get_arg_for_parm): Fail
	gracefully is the number of parameters at the callee exceeds the
	number of arguments at the call stmt.
	(callgraph_superedge::get_parm_for_arg): Likewise.

2020-01-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93382
	* program-state.cc (sm_state_map::on_svalue_purge): If the
	entry survives, but the origin is being purged, then reset the
	origin to null.

2020-01-22  David Malcolm  <dmalcolm@redhat.com>

	* sm-signal.cc: Fix nesting of CHECKING_P and namespace ana.

2020-01-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93378
	* engine.cc (setjmp_svalue::compare_fields): Update for
	replacement of m_enode with m_setjmp_record.
	(setjmp_svalue::add_to_hash): Likewise.
	(setjmp_svalue::get_index): Rename...
	(setjmp_svalue::get_enode_index): ...to this.
	(setjmp_svalue::print_details): Update for replacement of m_enode
	with m_setjmp_record.
	(exploded_node::on_longjmp): Likewise.
	* exploded-graph.h (rewind_info_t::m_enode_origin): Replace...
	(rewind_info_t::m_setjmp_record): ...with this.
	(rewind_info_t::rewind_info_t): Update for replacement of m_enode
	with m_setjmp_record.
	(rewind_info_t::get_setjmp_point): Likewise.
	(rewind_info_t::get_setjmp_call): Likewise.
	* region-model.cc (region_model::dump_summary_of_map): Likewise.
	(region_model::on_setjmp): Likewise.
	* region-model.h (struct setjmp_record): New struct.
	(setjmp_svalue::m_enode): Replace...
	(setjmp_svalue::m_setjmp_record): ...with this.
	(setjmp_svalue::setjmp_svalue): Update for replacement of m_enode
	with m_setjmp_record.
	(setjmp_svalue::clone): Likewise.
	(setjmp_svalue::get_index): Rename...
	(setjmp_svalue::get_enode_index): ...to this.
	(setjmp_svalue::get_exploded_node): Replace...
	(setjmp_svalue::get_setjmp_record): ...with this.

2020-01-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93316
	* analyzer.cc (is_setjmp_call_p): Check for "setjmp" as well as
	"_setjmp".

2020-01-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93307
	* analysis-plan.h: Wrap everything namespace "ana".
	* analyzer-logging.cc: Likewise.
	* analyzer-logging.h: Likewise.
	* analyzer-pass.cc (pass_analyzer::execute): Update for "ana"
	namespace.
	* analyzer-selftests.cc: Wrap everything namespace "ana".
	* analyzer-selftests.h: Likewise.
	* analyzer.h: Likewise for forward decls of types.
	* call-string.h: Likewise.
	* checker-path.cc: Likewise.
	* checker-path.h: Likewise.
	* constraint-manager.cc: Likewise.
	* constraint-manager.h: Likewise.
	* diagnostic-manager.cc: Likewise.
	* diagnostic-manager.h: Likewise.
	* engine.cc: Likewise.
	* engine.h: Likewise.
	* exploded-graph.h: Likewise.
	* function-set.cc: Likewise.
	* function-set.h: Likewise.
	* pending-diagnostic.cc: Likewise.
	* pending-diagnostic.h: Likewise.
	* program-point.cc: Likewise.
	* program-point.h: Likewise.
	* program-state.cc: Likewise.
	* program-state.h: Likewise.
	* region-model.cc: Likewise.
	* region-model.h: Likewise.
	* sm-file.cc: Likewise.
	* sm-malloc.cc: Likewise.
	* sm-pattern-test.cc: Likewise.
	* sm-sensitive.cc: Likewise.
	* sm-signal.cc: Likewise.
	* sm-taint.cc: Likewise.
	* sm.cc: Likewise.
	* sm.h: Likewise.
	* state-purge.h: Likewise.
	* supergraph.cc: Likewise.
	* supergraph.h: Likewise.

2020-01-21  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93352
	* region-model.cc (int_cmp): Rename to...
	(array_region::key_cmp): ...this, using key_t rather than int.
	Rewrite in terms of comparisons rather than subtraction to
	ensure qsort is anti-symmetric when handling extreme values.
	(array_region::walk_for_canonicalization): Update for above
	renaming.
	* region-model.h (array_region::key_cmp): New decl.

2020-01-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93290
	* region-model.cc (region_model::eval_condition_without_cm): Avoid
	gcc_unreachable for unexpected operations for the case where
	we're comparing an svalue against itself.

2020-01-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93281
	* region-model.cc
	(region_model::convert_byte_offset_to_array_index): Convert to
	ssizetype before dividing by byte_size.  Use fold_binary rather
	than fold_build2 to avoid needlessly constructing a tree for the
	non-const case.

2020-01-15  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (class impl_region_model_context): Fix comment.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93212
	* region-model.cc (make_region_for_type): Use
	FUNC_OR_METHOD_TYPE_P rather than comparing against FUNCTION_TYPE.
	* region-model.h (function_region::function_region): Likewise.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (sm_state_map::clone_with_remapping): Copy
	m_global_state.
	(selftest::test_program_state_merging_2): New selftest.
	(selftest::analyzer_program_state_cc_tests): Call it.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.h (checker_path::get_checker_event): New function.
	(checker_path): Add DISABLE_COPY_AND_ASSIGN; make fields private.
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic): Replace direct
	access to checker_path::m_events with accessor functions.  Fix
	overlong line.
	(diagnostic_manager::prune_interproc_events): Replace direct
	access to checker_path::m_events with accessor functions.
	(diagnostic_manager::finish_pruning): Likewise.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.h (checker_event::clone): Delete vfunc decl.
	(debug_event::clone): Delete vfunc impl.
	(custom_event::clone): Delete vfunc impl.
	(statement_event::clone): Delete vfunc impl.
	(function_entry_event::clone): Delete vfunc impl.
	(state_change_event::clone): Delete vfunc impl.
	(start_cfg_edge_event::clone): Delete vfunc impl.
	(end_cfg_edge_event::clone): Delete vfunc impl.
	(call_event::clone): Delete vfunc impl.
	(return_event::clone): Delete vfunc impl.
	(setjmp_event::clone): Delete vfunc impl.
	(rewind_from_longjmp_event::clone): Delete vfunc impl.
	(rewind_to_setjmp_event::clone): Delete vfunc impl.
	(warning_event::clone): Delete vfunc impl.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* supergraph.cc (supernode::dump_dot): Ensure that the TABLE
	element has at least one TR.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/58237
	* engine.cc (leak_stmt_finder::find_stmt): Use get_pure_location
	when comparing against UNKNOWN_LOCATION.
	(stmt_requires_new_enode_p): Likewise.
	(exploded_graph::dump_exploded_nodes): Likewise.
	* supergraph.cc (supernode::get_start_location): Likewise.
	(supernode::get_end_location): Likewise.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/58237
	* analyzer-selftests.cc (selftest::run_analyzer_selftests): Call
	selftest::analyzer_sm_file_cc_tests.
	* analyzer-selftests.h (selftest::analyzer_sm_file_cc_tests): New
	decl.
	* sm-file.cc: Include "analyzer/function-set.h" and
	"analyzer/analyzer-selftests.h".
	(get_file_using_fns): New function.
	(is_file_using_fn_p): New function.
	(fileptr_state_machine::on_stmt): Return true for known functions.
	(selftest::analyzer_sm_file_cc_tests): New function.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* analyzer-selftests.cc (selftest::run_analyzer_selftests): Call
	selftest::analyzer_sm_signal_cc_tests.
	* analyzer-selftests.h (selftest::analyzer_sm_signal_cc_tests):
	New decl.
	* sm-signal.cc: Include "analyzer/function-set.h" and
	"analyzer/analyzer-selftests.h".
	(get_async_signal_unsafe_fns): New function.
	(signal_unsafe_p): Reimplement in terms of the above.
	(selftest::analyzer_sm_signal_cc_tests): New function.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* analyzer-selftests.cc (selftest::run_analyzer_selftests): Call
	selftest::analyzer_function_set_cc_tests.
	* analyzer-selftests.h (selftest::analyzer_function_set_cc_tests):
	New decl.
	* function-set.cc: New file.
	* function-set.h: New file.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (fndecl_has_gimple_body_p): New decl.
	* engine.cc (impl_region_model_context::on_unknown_change): New
	function.
	(fndecl_has_gimple_body_p): Make non-static.
	(exploded_node::on_stmt): Treat __analyzer_dump_exploded_nodes as
	known.  Track whether we have a call with unknown side-effects and
	pass it to on_call_post.
	* exploded-graph.h (impl_region_model_context::on_unknown_change):
	New decl.
	* program-state.cc (sm_state_map::on_unknown_change): New function.
	* program-state.h (sm_state_map::on_unknown_change): New decl.
	* region-model.cc: Include "bitmap.h".
	(region_model::on_call_pre): Return a bool, capturing whether the
	call has unknown side effects.
	(region_model::on_call_post): Add arg "bool unknown_side_effects"
	and if true, call handle_unrecognized_call.
	(class reachable_regions): New class.
	(region_model::handle_unrecognized_call): New function.
	* region-model.h (region_model::on_call_pre): Return a bool.
	(region_model::on_call_post): Add arg "bool unknown_side_effects".
	(region_model::handle_unrecognized_call): New decl.
	(region_model_context::on_unknown_change): New vfunc.
	(test_region_model_context::on_unknown_change): New function.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (saved_diagnostic::operator==): Move here
	from header.  Replace pointer equality test on m_var with call to
	pending_diagnostic::same_tree_p.
	* diagnostic-manager.h (saved_diagnostic::operator==): Move to
	diagnostic-manager.cc.
	* pending-diagnostic.cc (pending_diagnostic::same_tree_p): New.
	* pending-diagnostic.h (pending_diagnostic::same_tree_p): New.
	* sm-file.cc (file_diagnostic::subclass_equal_p): Replace pointer
	equality on m_arg with call to pending_diagnostic::same_tree_p.
	* sm-malloc.cc (malloc_diagnostic::subclass_equal_p): Likewise.
	(possible_null_arg::subclass_equal_p): Likewise.
	(null_arg::subclass_equal_p): Likewise.
	(free_of_non_heap::subclass_equal_p): Likewise.
	* sm-pattern-test.cc (pattern_match::operator==): Likewise.
	* sm-sensitive.cc (exposure_through_output_file::operator==):
	Likewise.
	* sm-taint.cc (tainted_array_index::operator==): Likewise.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (dedupe_winners::add): Add logging
	of deduplication decisions made.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* ChangeLog: New file.
	* analyzer-selftests.cc: New file.
	* analyzer-selftests.h: New file.
	* analyzer.opt: New file.
	* analysis-plan.cc: New file.
	* analysis-plan.h: New file.
	* analyzer-logging.cc: New file.
	* analyzer-logging.h: New file.
	* analyzer-pass.cc: New file.
	* analyzer.cc: New file.
	* analyzer.h: New file.
	* call-string.cc: New file.
	* call-string.h: New file.
	* checker-path.cc: New file.
	* checker-path.h: New file.
	* constraint-manager.cc: New file.
	* constraint-manager.h: New file.
	* diagnostic-manager.cc: New file.
	* diagnostic-manager.h: New file.
	* engine.cc: New file.
	* engine.h: New file.
	* exploded-graph.h: New file.
	* pending-diagnostic.cc: New file.
	* pending-diagnostic.h: New file.
	* program-point.cc: New file.
	* program-point.h: New file.
	* program-state.cc: New file.
	* program-state.h: New file.
	* region-model.cc: New file.
	* region-model.h: New file.
	* sm-file.cc: New file.
	* sm-malloc.cc: New file.
	* sm-malloc.dot: New file.
	* sm-pattern-test.cc: New file.
	* sm-sensitive.cc: New file.
	* sm-signal.cc: New file.
	* sm-taint.cc: New file.
	* sm.cc: New file.
	* sm.h: New file.
	* state-purge.cc: New file.
	* state-purge.h: New file.
	* supergraph.cc: New file.
	* supergraph.h: New file.

2019-12-13  David Malcolm  <dmalcolm@redhat.com>

	* Initial creation


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