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Diffstat (limited to 'gcc/tree-ssa-alias.c')
| -rw-r--r-- | gcc/tree-ssa-alias.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index e713708..cbb43b5 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -963,6 +963,7 @@ ref_maybe_used_by_call_p_1 (gimple call, ao_ref *ref) } /* The following builtins do not read from memory. */ case BUILT_IN_FREE: + case BUILT_IN_MALLOC: case BUILT_IN_MEMSET: case BUILT_IN_FREXP: case BUILT_IN_FREXPF: @@ -1187,6 +1188,10 @@ call_may_clobber_ref_p_1 (gimple call, ao_ref *ref) size); return refs_may_alias_p_1 (&dref, ref, false); } + /* Allocating memory does not have any side-effects apart from + being the definition point for the pointer. */ + case BUILT_IN_MALLOC: + return false; /* Freeing memory kills the pointed-to memory. More importantly the call has to serve as a barrier for moving loads and stores across it. */ |