diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 16 |
1 files changed, 9 insertions, 7 deletions
@@ -1297,11 +1297,12 @@ emit_block_move_via_movmem (rtx x, rtx y, rtx size, unsigned int align, /* We don't need MODE to be narrower than BITS_PER_HOST_WIDE_INT here because if SIZE is less than the mode mask, as it is returned by the macro, it will definitely be less than the - actual mode mask. */ + actual mode mask. Since SIZE is within the Pmode address + space, we limit MODE to Pmode. */ && ((CONST_INT_P (size) && ((unsigned HOST_WIDE_INT) INTVAL (size) <= (GET_MODE_MASK (mode) >> 1))) - || GET_MODE_BITSIZE (mode) >= BITS_PER_WORD)) + || GET_MODE_BITSIZE (mode) >= GET_MODE_BITSIZE (Pmode))) { struct expand_operand ops[6]; unsigned int nops; @@ -2879,14 +2880,15 @@ set_storage_via_setmem (rtx object, rtx size, rtx val, unsigned int align, enum insn_code code = direct_optab_handler (setmem_optab, mode); if (code != CODE_FOR_nothing - /* We don't need MODE to be narrower than - BITS_PER_HOST_WIDE_INT here because if SIZE is less than - the mode mask, as it is returned by the macro, it will - definitely be less than the actual mode mask. */ + /* We don't need MODE to be narrower than BITS_PER_HOST_WIDE_INT + here because if SIZE is less than the mode mask, as it is + returned by the macro, it will definitely be less than the + actual mode mask. Since SIZE is within the Pmode address + space, we limit MODE to Pmode. */ && ((CONST_INT_P (size) && ((unsigned HOST_WIDE_INT) INTVAL (size) <= (GET_MODE_MASK (mode) >> 1))) - || GET_MODE_BITSIZE (mode) >= BITS_PER_WORD)) + || GET_MODE_BITSIZE (mode) >= GET_MODE_BITSIZE (Pmode))) { struct expand_operand ops[6]; unsigned int nops; |