diff options
Diffstat (limited to 'gcc/tree-ssa-alias.c')
| -rw-r--r-- | gcc/tree-ssa-alias.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index 4edacb5..1e80f49 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -1196,6 +1196,9 @@ ref_maybe_used_by_call_p_1 (gimple call, ao_ref *ref) case BUILT_IN_FREE: case BUILT_IN_MALLOC: case BUILT_IN_CALLOC: + case BUILT_IN_ALLOCA: + case BUILT_IN_STACK_SAVE: + case BUILT_IN_STACK_RESTORE: case BUILT_IN_MEMSET: case BUILT_IN_FREXP: case BUILT_IN_FREXPF: @@ -1432,6 +1435,9 @@ call_may_clobber_ref_p_1 (gimple call, ao_ref *ref) && targetm.ref_may_alias_errno (ref)) return true; return false; + case BUILT_IN_STACK_SAVE: + case BUILT_IN_ALLOCA: + 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. */ |