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* tree-ssa-loop-ivopts.c: New file.
* Makefile.in (tree-ssa-loop-ivopts.c): Add.
* cfgloop.h (target_avail_regs, target_res_regs, target_small_cost,
target_pres_cost, target_spill_cost): Declare.
* cfgloopanal.c (avail_regs, res_regs, small_cost, pres_cost,
spill_cost): Renamed to ...
(target_avail_regs, target_res_regs, target_small_cost,
target_pres_cost, target_spill_cost): ... and exported.
(init_set_costs, global_cost_for_size): Work with renamed variables.
* common.opt (flag_ivopts): New flag.
* expr.c (expand_expr_real_1): Handle SSA_NAME case. Handle
REF_ORIGINAL.
* gimplify.c (struct gimplify_ctx): Add into_ssa field.
(internal_get_tmp_var, gimplify_modify_expr, gimplify_expr): Support
generating SSA form.
(force_gimple_operand): New function.
* timevar.def (TV_TREE_LOOP_IVOPTS): New timevar.
* tree-cfg.c (stmt_bsi): New function.
* params.def (PARAM_IV_CONSIDER_ALL_CANDIDATES_BOUND,
PARAM_IV_MAX_CONSIDERED_USES): New.
* tree-flow.h (stmt_bsi, tree_ssa_iv_optimize, split_loop_exit_edge,
bsi_insert_on_edge_immediate_loop. standard_iv_increment_position,
ip_end_pos, ip_normal_pos, force_gimple_operand): Declare.
* tree-gimple.c (is_gimple_formal_tmp_var): Accept ssa names.
* tree-nested.c (build_addr): Export.
* tree-optimize.c (init_tree_optimization_passes): Add
pass_iv_optimize.
* tree-pass.h (pass_iv_optimize): Declare.
* tree-ssa-loop-im.c (for_each_index): Handle REALPART_EXPR and
IMAGPART_EXPR.
* tree-ssa-loop-manip.c (create_iv): Force the base to be acceptable
as a phi node argument.
(split_loop_exit_edge, bsi_insert_on_edge_immediate_loop,
ip_end_pos, ip_normal_pos, standard_iv_increment_position): New
functions.
* tree-ssa-loop-niter.c (zero_p, unsigned_type_for): Export.
* tree-ssa-loop.c (tree_ssa_loop_ivopts, gate_tree_ssa_loop_ivopts,
pass_iv_optimize): New pass.
* tree-ssa-operands.c (get_indirect_ref_operands): Handle REF_ORIGINAL.
* tree-ssanames.c (release_ssa_name): Allow calling with var = NULL.
* tree.c (build_int_cst_type, cst_and_fits_in_hwi): New functions.
* tree.h (REF_ORIGINAL): New macro.
(build_int_cst_type, unsigned_type_for, zero_p,
cst_and_fits_in_hwi, build_addr): Declare.
* doc/invoke.texi (-fivopts): Document.
(PARAM_IV_CONSIDER_ALL_CANDIDATES_BOUND,
PARAM_IV_MAX_CONSIDERED_USES): Document.
* doc/passes.texi: Document induction variable optimizations pass.
* gcc.dg/tree-ssa/loop-2.c: New test.
* gcc.dg/tree-ssa/loop-3.c: New test.
* gcc.dg/tree-ssa/loop-4.c: New test.
* gcc.dg/tree-ssa/loop-5.c: New test.
From-SVN: r87100
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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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* tree-ssa-loop-manip.c: New file.
* Makefile.in (tree-ssa-loop-manip.o): Add.
* tree-flow.h (rewrite_into_loop_closed_ssa, verify_loop_closed_ssa):
Declare.
* tree-ssa-loop.c (tree_loop_optimizer_init): Create loop closed ssa
form.
(tree_ssa_loop_done): Verify loop closed ssa form.
* tree-ssa-loop-im.c (move_computations): Update loop closed ssa form.
From-SVN: r85613
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