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2004-08-25 Andrew MacLeod <amacleod@redhat.com>
* tree-ssa-operands.h (struct ssa_operand_iterator_d): New. SSA operand
iterator controlling structure.
(SSA_OP_USE, SSA_OP_DEF, SSA_OP_VUSE, SSA_OP_VMAYUSE, SSA_OP_VMAYDEF,
SSA_OP_VMUSTDEF, SSA_OP_VIRTUAL_USES, SSA_OP_VIRTUAL_DEFS,
SSA_OP_ALL_USES, SSA_OP_ALL_DEFS, SSA_OP_ALL_OPERANDS): New. Operand
iterator flags.
(FOR_EACH_SSA_TREE_OPERAND): New. Iterate over operands as trees.
(FOR_EACH_SSA_USE_OPERAND): New. Iterate over operands as uses.
(FOR_EACH_SSA_DEF_OPERAND): New. Iterate over operands as defs.
(FOR_EACH_SSA_MAYDEF_OPERAND): New. Iterate over V_MAY_DEFs.
* tree-ssa-operands.c (NULL_DEF_OPERAND_P, NULL_USE_OPERAND_P): New.
Empty operand pointers.
* tree-flow-inline.h (op_iter_done): New. Return true if finished.
(op_iter_next_use): New. Return next use_operand_p.
(op_iter_next_def): New. Return next def_operand_p.
(op_iter_next_tree): New. Return next operands as a tree.
(op_iter_init): New. Initialize an iterator structure.
(op_iter_init_use): New. Initialize structure and get the first use.
(op_iter_init_def): New. Initialize structure and get the first def.
(op_iter_init_tree): New. Initialize structure and get the first tree.
(op_iter_next_maydef): New. Return next V_MAY_DEF operands.
(op_iter_init_maydef): New. Initialize structure and get the first
V_MAY_DEF operands.
* tree-cfg.c (tree_duplicate_bb): Use new operand iterator.
* tree-dfa.c (compute_immediate_uses_for_stmt,
redirect_immediate_uses): Use new operand iterator.
(v_may_defs_disappeared_p, v_must_defs_disappeared_p): Delete.
(mark_new_vars_to_rename): Use new operand iterator. Count virtual
operands instead of using *_disappeared_p routines.
* tree-into-ssa.c (mark_def_sites, ssa_mark_def_sites, rewrite_stmt,
ssa_rewrite_stmt): Use new operand iterator.
* tree-outof-ssa.c (check_replaceable, find_replaceable_in_bb,
rewrite_trees): Use new operand iterator.
* tree-pretty-print.c (dump_vops): Use new operand iterator.
* tree-sra.c (mark_all_v_defs): Use new operand iterator.
* tree-ssa-alias.c (compute_points_to_and_addr_escape,
dump_points_to_info): Use new operand iterator.
* tree-ssa-ccp.c (cp_lattice_meet, visit_stmt, initialize,
replace_uses_in, replace_vuse_in, likely_value, set_rhs): Use new
operand iterator.
* tree-ssa-dce.c (mark_stmt_if_obviously_necessary,
propagate_necessity): Use new operand iterator.
* tree-ssa-dom.c (cprop_into_stmt, optimize_stmt): Use operand iterator.
(register_definitions_for_stmt): Use new operand iterator. Take stmt as
a parameter instead of a stmt_ann_t.
* tree-ssa-live.c (create_ssa_var_map, calculate_live_on_entry,
build_tree_conflict_graph): Use new operand iterator.
* tree-ssa-loop-im.c (determine_max_movement, single_reachable_address,
rewrite_mem_refs): Use new operand iterator.
* tree-ssa-loop-manip.c (find_uses_to_rename_stmt,
check_loop_closed_ssa_use): Use new operand iterator.
* tree-ssa.c (verify_ssa, replace_immediate_uses): Use operand iterator.
* tree-ssanames.c (release_defs): Use new operand iterator.
* tree-vectorizer.c (vect_create_data_ref): Use new operand iterator.
From-SVN: r86583
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* tree-ssa-loop-ivcanon.c: New file.
* tree-ssa-loop-manip.c (create_iv): New function.
* Makefile.in (tree-ssa-loop-ivcanon.o): Add.
(tree-ssa-loop.o, tree-ssa-loop-manip.o): Add SCEV_H dependency.
* cfgloop.c (mark_single_exit_loops): New function.
(verify_loop_structure): Verify single-exit loops.
* cfgloop.h (struct loop): Add single_exit field.
(LOOPS_HAVE_MARKED_SINGLE_EXITS): New constant.
(mark_single_exit_loops): Declare.
(tree_num_loop_insns): Declare.
* cfgloopmanip.c (update_single_exits_after_duplication): New function.
(duplicate_loop_to_header_edge): Use it.
* common.opt (fivcanon): New flag.
* timevar.def (TV_TREE_LOOP_IVCANON, TV_COMPLETE_UNROLL): New timevars.
* tree-cfg.c (tree_find_edge_insert_loc): Return newly created block.
(bsi_commit_edge_inserts_1): Pass null to tree_find_edge_insert_loc.
(bsi_insert_on_edge_immediate): New function.
* tree-flow.h (bsi_insert_on_edge_immediate,
canonicalize_induction_variables, tree_unroll_loops_completely,
create_iv): Declare.
* tree-optimize.c (init_tree_optimization_passes): Add
pass_iv_canon and pass_complete_unroll.
* tree-pass.h (pass_iv_canon, pass_complete_unroll): Declare.
* tree-scalar-evolution.c (get_loop_exit_condition,
get_exit_conditions_rec, number_of_iterations_in_loop,
scev_initialize): Use single_exit information.
* tree-ssa-loop-niter.c (number_of_iterations_cond): Record
missing assumptions.
(loop_niter_by_eval): Return number of iterations as unsigned
int.
* tree-ssa-loop.c (tree_ssa_loop_init): Mark single exit loops.
(tree_ssa_loop_ivcanon, gate_tree_ssa_loop_ivcanon, pass_iv_canon,
tree_complete_unroll, gate_tree_complete_unroll, pass_complete_unroll):
New passes.
(tree_ssa_loop_done): Call free_numbers_of_iterations_estimates.
* tree-ssanames.c (make_ssa_name): Allow creating ssa name before
the defining statement is ready.
* tree-vectorizer.c (vect_create_iv_simple): Removed.
(vect_create_index_for_array_ref, vect_transform_loop_bound):
Use create_iv.
(vect_transform_loop_bound): Use single_exit information.
(vect_analyze_loop_form): Cleanup bogus tests.
(vectorize_loops): Do not call flow_loop_scan.
* tree.h (may_negate_without_overflow_p): Declare.
* fold-const.c (may_negate_without_overflow_p): Split out from ...
(negate_expr_p): ... this function.
(tree_expr_nonzero_p): Handle overflowed constants correctly.
* doc/invoke.texi (-fivcanon): Document.
* doc/passes.texi: Document canonical induction variable creation.
* gcc.dg/tree-ssa/loop-1.c: New test.
From-SVN: r86516
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