path: root/gcc/analyzer/ChangeLog

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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