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| author | bstarynk <bstarynk@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-11-14 14:34:33 +0000 |
|---|---|---|
| committer | bstarynk <bstarynk@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-11-14 14:34:33 +0000 |
| commit | 1e87b08a4c89ee453308a0b09b5bc40a5e3bec10 (patch) | |
| tree | ed7af923d74901a7a6ff5d07ef176a640a585ba7 /gcc/tree-ssa-sccvn.c | |
| parent | cbacd2740bd9c2dfe6a0a755f74ddb45781a0665 (diff) | |
| download | gcc-1e87b08a4c89ee453308a0b09b5bc40a5e3bec10.tar.gz | |
2011-11-14 Basile Starynkevitch <basile@starynkevitch.net>
MELT branch merged with trunk rev 181350 using svnmerge
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/melt-branch@181351 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-sccvn.c')
| -rw-r--r-- | gcc/tree-ssa-sccvn.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index c33b87dd7fe..fa268c2ef8b 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -1388,8 +1388,12 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *vr_) if (maxsize == -1) return (void *)-1; + /* We can't deduce anything useful from clobbers. */ + if (gimple_clobber_p (def_stmt)) + return (void *)-1; + /* def_stmt may-defs *ref. See if we can derive a value for *ref - from that defintion. + from that definition. 1) Memset. */ if (is_gimple_reg_type (vr->type) && gimple_call_builtin_p (def_stmt, BUILT_IN_MEMSET) |