diff options
Diffstat (limited to 'gcc/tree-ssa-copy.c')
| -rw-r--r-- | gcc/tree-ssa-copy.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/tree-ssa-copy.c b/gcc/tree-ssa-copy.c index 75ab54a..9bc455c 100644 --- a/gcc/tree-ssa-copy.c +++ b/gcc/tree-ssa-copy.c @@ -60,7 +60,13 @@ may_propagate_copy (tree dest, tree orig) /* If ORIG flows in from an abnormal edge, it cannot be propagated. */ if (TREE_CODE (orig) == SSA_NAME - && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (orig)) + && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (orig) + /* If it is the default definition and an automatic variable then + we can though and it is important that we do to avoid + uninitialized regular copies. */ + && !(SSA_NAME_IS_DEFAULT_DEF (orig) + && (SSA_NAME_VAR (orig) == NULL_TREE + || TREE_CODE (SSA_NAME_VAR (orig)) == VAR_DECL))) return false; /* If DEST is an SSA_NAME that flows from an abnormal edge, then it |