diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 11de1c78500..0005e2afd25 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -3866,7 +3866,12 @@ combine_simplify_rtx (x, op0_mode, last, in_dest) /* simplify_subreg can't use gen_lowpart_for_combine. */ if (CONSTANT_P (SUBREG_REG (x)) - && subreg_lowpart_offset (mode, op0_mode) == SUBREG_BYTE (x)) + && subreg_lowpart_offset (mode, op0_mode) == SUBREG_BYTE (x) + /* Don't call gen_lowpart_for_combine if the inner mode + is VOIDmode and we cannot simplify it, as SUBREG without + inner mode is invalid. */ + && (GET_MODE (SUBREG_REG (x)) != VOIDmode + || gen_lowpart_common (mode, SUBREG_REG (x)))) return gen_lowpart_for_combine (mode, SUBREG_REG (x)); if (GET_MODE_CLASS (GET_MODE (SUBREG_REG (x))) == MODE_CC) |
