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2006-01-11 Paolo Bonzini <bonzini@gnu.org>
PR tree-optimization/23109
PR tree-optimization/23948
PR tree-optimization/24123
* Makefile.in (tree-ssa-math-opts.o): Adjust dependencies.
* tree-cfg.c (single_noncomplex_succ): New.
* tree-flow.h (single_noncomplex_succ): Declare it.
* tree-ssa-math-opts.c (enum place_reciprocal): Remove.
* tree-ssa-math-opts.c (enum place_reciprocal): Remove.
(struct occurrence, occ_head, occ_pool, is_divide_by, compute_merit,
insert_bb, register_division_in, insert_reciprocals,
replace_reciprocal, free_bb): New.
(execute_cse_reciprocals_1): Rewritten.
(execute_cse_reciprocals): Adjust calls to execute_cse_reciprocals_1.
Do not commit any edge insertion. Always compute dominators and
create the allocation pool.
* target-def.h (TARGET_MIN_DIVISIONS_FOR_RECIP_MUL): New.
* target.h (struct gcc_target): Add min_divistions_for_recip_mul.
* targhooks.c (default_min_divistions_for_recip_mul): New.
* targhooks.h (default_min_divistions_for_recip_mul): New prototype.
* passes.c (init_optimization_passes): Run recip after tree loop
optimizations.
* doc/tm.texi (Misc): Document TARGET_MIN_DIVISIONS_FOR_RECIP_MUL.
gcc/testsuite:
2006-01-11 Paolo Bonzini <bonzini@gnu.org>
PR tree-optimization/23109
PR tree-optimization/23948
PR tree-optimization/24123
* gcc.dg/tree-ssa/recip-3.c, gcc.dg/tree-ssa/recip-4.c,
gcc.dg/tree-ssa/recip-5.c, gcc.dg/tree-ssa/recip-6.c,
gcc.dg/tree-ssa/recip-7.c, gcc.dg/tree-ssa/pr23109.c,
g++.dg/tree-ssa/pr23948.C: New testcases.
* gcc.dg/tree-ssa/recip-2.c, gcc.dg/tree-ssa/pr23234.c: Provide
three divisions in order to do the optimization.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@109578 138bc75d-0d04-0410-961f-82ee72b054a4
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