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 93621bd..ae25ef3 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -8089,12 +8089,17 @@ make_compound_operation_int (machine_mode mode, rtx *x_ptr, /* If the SUBREG is masking of a logical right shift, make an extraction. */ if (GET_CODE (inner) == LSHIFTRT + && CONST_INT_P (XEXP (inner, 1)) && GET_MODE_SIZE (mode) < GET_MODE_SIZE (GET_MODE (inner)) && subreg_lowpart_p (x)) { new_rtx = make_compound_operation (XEXP (inner, 0), next_code); + int width = GET_MODE_PRECISION (GET_MODE (inner)) + - INTVAL (XEXP (inner, 1)); + if (width > mode_width) + width = mode_width; new_rtx = make_extraction (mode, new_rtx, 0, XEXP (inner, 1), - mode_width, 1, 0, in_code == COMPARE); + width, 1, 0, in_code == COMPARE); break; } |