diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 9 |
1 files changed, 6 insertions, 3 deletions
@@ -4238,14 +4238,17 @@ store_expr (exp, target, want_value) || (temp != target && (side_effects_p (temp) || side_effects_p (target)))) && TREE_CODE (exp) != ERROR_MARK - /* If there's nothing to copy, don't bother. */ - && expr_size (exp) != const0_rtx && ! dont_store_target /* If store_expr stores a DECL whose DECL_RTL(exp) == TARGET, but TARGET is not valid memory reference, TEMP will differ from TARGET although it is really the same location. */ && (TREE_CODE_CLASS (TREE_CODE (exp)) != 'd' - || target != DECL_RTL_IF_SET (exp))) + || target != DECL_RTL_IF_SET (exp)) + /* If there's nothing to copy, don't bother. Don't call expr_size + unless necessary, because some front-ends (C++) expr_size-hook + aborts on objects that are not supposed to be bit-copied or + bit-initialized. */ + && expr_size (exp) != const0_rtx) { target = protect_from_queue (target, 1); if (GET_MODE (temp) != GET_MODE (target) |