diff options
Diffstat (limited to 'gcc/tree-ssa.c')
| -rw-r--r-- | gcc/tree-ssa.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/tree-ssa.c b/gcc/tree-ssa.c index 935cad6..ce0f1e4 100644 --- a/gcc/tree-ssa.c +++ b/gcc/tree-ssa.c @@ -1188,6 +1188,11 @@ useless_type_conversion_p_1 (tree outer_type, tree inner_type) if (TREE_CODE (inner_type) != TREE_CODE (outer_type)) return false; + /* Conversion from an incomplete to a complete type is never + useless. */ + if (!COMPLETE_TYPE_P (inner_type) && COMPLETE_TYPE_P (outer_type)) + return false; + /* ??? This seems to be necessary even for aggregates that don't have TYPE_STRUCTURAL_EQUALITY_P set. */ |