diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 5183508..3f90edb 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6792,7 +6792,9 @@ simplify_shift_const (x, code, result_mode, varop, count) /* If VAROP is a SUBREG, strip it as long as the inner operand has the same number of words as what we've seen so far. Then store the widest mode in MODE. */ - if (SUBREG_WORD (varop) == 0 + if (subreg_lowpart_p (varop) + && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (varop))) + > GET_MODE_SIZE (GET_MODE (varop))) && (((GET_MODE_SIZE (GET_MODE (SUBREG_REG (varop))) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD) == mode_words)) |