diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 12 |
1 files changed, 11 insertions, 1 deletions
@@ -6756,7 +6756,17 @@ expand_expr (exp, target, tmode, modifier) && SLOW_UNALIGNED_ACCESS (mode1, alignment) && ((TYPE_ALIGN (TREE_TYPE (tem)) < (unsigned int) GET_MODE_ALIGNMENT (mode)) - || (bitpos % GET_MODE_ALIGNMENT (mode) != 0))))) + || (bitpos % GET_MODE_ALIGNMENT (mode) != 0))) + /* If the type and the field are a constant size and the + size of the type isn't the same size as the bitfield, + we must use bitfield operations. */ + || ((bitsize >= 0 + && (TREE_CODE (TYPE_SIZE (TREE_TYPE (exp))) + == INTEGER_CST) + && ((TREE_INT_CST_HIGH (TYPE_SIZE (TREE_TYPE (exp))) + != 0) + || (TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (exp))) + != bitsize)))))) || (modifier != EXPAND_CONST_ADDRESS && modifier != EXPAND_INITIALIZER && mode == BLKmode |