diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 18 |
1 files changed, 13 insertions, 5 deletions
@@ -2392,7 +2392,13 @@ clear_storage (object, size, align) #endif rtx retval = 0; - if (GET_MODE (object) == BLKmode) + /* If OBJECT is not BLKmode and SIZE is the same size as its mode, + just move a zero. Otherwise, do this a piece at a time. */ + if (GET_MODE (object) != BLKmode + && GET_CODE (size) == CONST_INT + && GET_MODE_SIZE (GET_MODE (object)) == INTVAL (size)) + emit_move_insn (object, CONST0_RTX (GET_MODE (object))); + else { object = protect_from_queue (object, 1); size = protect_from_queue (size, 0); @@ -2544,8 +2550,6 @@ clear_storage (object, size, align) #endif } } - else - emit_move_insn (object, CONST0_RTX (GET_MODE (object))); return retval; } @@ -4263,11 +4267,15 @@ store_constructor (exp, target, align, cleared, size) /* If the constructor has fewer fields than the structure or if we are initializing the structure to mostly zeros, - clear the whole structure first. */ + clear the whole structure first. Don't do this is TARGET is + register whose mode size isn't equal to SIZE since clear_storage + can't handle this case. */ else if (size > 0 && ((list_length (CONSTRUCTOR_ELTS (exp)) != fields_length (type)) - || mostly_zeros_p (exp))) + || mostly_zeros_p (exp)) + && (GET_CODE (target) != REG + || GET_MODE_SIZE (GET_MODE (target)) == size)) { if (! cleared) clear_storage (target, GEN_INT (size), align); |