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| author | Michael Matz <matz@suse.de> | 2009-10-26 13:00:36 +0000 |
|---|---|---|
| committer | Michael Matz <matz@gcc.gnu.org> | 2009-10-26 13:00:36 +0000 |
| commit | 842809179e1d2fbf0a2af44e6e3f445770613bc6 (patch) | |
| tree | fbb6277956a1693b32bea61a71c9fbf0f2321aee /gcc/tree-ssa-alias.h | |
| parent | bd02b3a0c9223cecb7ec0367ecae6c76bbcd9b50 (diff) | |
re PR tree-optimization/41783 (r151561 (PRE fix) regresses zeusmp)
PR tree-optimization/41783
* tree-ssa-alias.c (get_continuation_for_phi): Export, add a special
case for simple diamonds
* tree-ssa-alias.h (get_continuation_for_phi): Declare.
* tree-ssa-pre.c (translate_vuse_through_block): Add same_valid
argument, use alias oracle to skip some vdefs.
(phi_translate_1): Change call to above, don't allocate new
value ids if they can stay the same.
(compute_avail): Allow vuse walking when looking up references.
testsuite/
* gcc.dg/pr41783.c: New test.
* gcc.dg/tree-ssa/ssa-pre-23.c: Adjust.
* gcc.dg/tree-ssa/ssa-pre-24.c: Don't xfail anymore.
* gcc.dg/tree-ssa/ssa-pre-27.c: New test.
From-SVN: r153551
Diffstat (limited to 'gcc/tree-ssa-alias.h')
| -rw-r--r-- | gcc/tree-ssa-alias.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/tree-ssa-alias.h b/gcc/tree-ssa-alias.h index 49706925836..289fb86d04c 100644 --- a/gcc/tree-ssa-alias.h +++ b/gcc/tree-ssa-alias.h @@ -99,6 +99,7 @@ extern bool refs_output_dependent_p (tree, tree); extern bool ref_maybe_used_by_stmt_p (gimple, tree); extern bool stmt_may_clobber_ref_p (gimple, tree); extern bool stmt_may_clobber_ref_p_1 (gimple, ao_ref *); +extern tree get_continuation_for_phi (gimple, ao_ref *, bitmap *); extern void *walk_non_aliased_vuses (ao_ref *, tree, void *(*)(ao_ref *, tree, void *), void *(*)(ao_ref *, tree, void *), void *); |