diff options
Diffstat (limited to 'gcc/tree-ssa.c')
| -rw-r--r-- | gcc/tree-ssa.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/gcc/tree-ssa.c b/gcc/tree-ssa.c index 081d21a7b97..7b24c594a5c 100644 --- a/gcc/tree-ssa.c +++ b/gcc/tree-ssa.c @@ -1155,14 +1155,29 @@ warn_uninitialized_var (tree *tp, int *walk_subtrees, void *data) { tree t = *tp; - /* We only do data flow with SSA_NAMEs, so that's all we can warn about. */ - if (TREE_CODE (t) == SSA_NAME) + switch (TREE_CODE (t)) { + case SSA_NAME: + /* We only do data flow with SSA_NAMEs, so that's all we + can warn about. */ warn_uninit (t, "%H%qD is used uninitialized in this function", data); *walk_subtrees = 0; + break; + + case REALPART_EXPR: + case IMAGPART_EXPR: + /* The total store transformation performed during gimplification + creates uninitialized variable uses. If all is well, these will + be optimized away, so don't warn now. */ + if (TREE_CODE (TREE_OPERAND (t, 0)) == SSA_NAME) + *walk_subtrees = 0; + break; + + default: + if (IS_TYPE_OR_DECL_P (t)) + *walk_subtrees = 0; + break; } - else if (IS_TYPE_OR_DECL_P (t)) - *walk_subtrees = 0; return NULL_TREE; } |