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| author | Richard Guenther <rguenther@suse.de> | 2010-08-04 15:35:21 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2010-08-04 15:35:21 +0000 |
| commit | 55e3bc4cec7595280c4a69b258cafd887b6d9684 (patch) | |
| tree | ecae90fdd0683290850fccab2a2609a6bd01fa2a /gcc | |
| parent | 079e56d05c8f12be7596ba1d4b59e9e8b30f74a6 (diff) | |
| download | gcc-55e3bc4cec7595280c4a69b258cafd887b6d9684.zip gcc-55e3bc4cec7595280c4a69b258cafd887b6d9684.tar.gz gcc-55e3bc4cec7595280c4a69b258cafd887b6d9684.tar.bz2 | |
alias.c (rtx_refs_may_alias_p): Do not resort to TBAA if either alias-set is zero.
2010-08-04 Richard Guenther <rguenther@suse.de>
* alias.c (rtx_refs_may_alias_p): Do not resort to TBAA
if either alias-set is zero.
From-SVN: r162867
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/alias.c | 5 |
2 files changed, 9 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 77424eb..23f0d88 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2010-08-04 Richard Guenther <rguenther@suse.de> + * alias.c (rtx_refs_may_alias_p): Do not resort to TBAA + if either alias-set is zero. + +2010-08-04 Richard Guenther <rguenther@suse.de> + * tree-ssa-propagate.h (struct prop_value_d, prop_value_t): Move ... * tree-ssa-ccp.c: ... here. * tree-ssa-copy.c: ... and here. diff --git a/gcc/alias.c b/gcc/alias.c index 9b70bb8..f5de4db 100644 --- a/gcc/alias.c +++ b/gcc/alias.c @@ -354,7 +354,10 @@ rtx_refs_may_alias_p (const_rtx x, const_rtx mem, bool tbaa_p) || !ao_ref_from_mem (&ref2, mem)) return true; - return refs_may_alias_p_1 (&ref1, &ref2, tbaa_p); + return refs_may_alias_p_1 (&ref1, &ref2, + tbaa_p + && MEM_ALIAS_SET (x) != 0 + && MEM_ALIAS_SET (mem) != 0); } /* Returns a pointer to the alias set entry for ALIAS_SET, if there is |