diff options
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 3450f7b168b..b2123c16654 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -2409,7 +2409,11 @@ simplify_subreg (outermode, op, innermode, byte) if (GET_CODE (op) == MEM && ! mode_dependent_address_p (XEXP (op, 0)) - && ! MEM_VOLATILE_P (op) + /* Allow splitting of volatile memory references in case we don't + have instruction to move the whole thing. */ + && (! MEM_VOLATILE_P (op) + || (mov_optab->handlers[(int) innermode].insn_code + == CODE_FOR_nothing)) && GET_MODE_SIZE (outermode) <= GET_MODE_SIZE (GET_MODE (op))) { rtx new; |