diff options
Diffstat (limited to 'gcc/final.c')
| -rw-r--r-- | gcc/final.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/gcc/final.c b/gcc/final.c index 654f847..72edbc0 100644 --- a/gcc/final.c +++ b/gcc/final.c @@ -2763,8 +2763,15 @@ alter_subreg (rtx *xp) else if (REG_P (y)) { /* Simplify_subreg can't handle some REG cases, but we have to. */ - unsigned int regno = subreg_regno (x); - *xp = gen_rtx_REG_offset (y, GET_MODE (x), regno, SUBREG_BYTE (x)); + unsigned int regno; + HOST_WIDE_INT offset; + + regno = subreg_regno (x); + if (subreg_lowpart_p (x)) + offset = byte_lowpart_offset (GET_MODE (x), GET_MODE (y)); + else + offset = SUBREG_BYTE (x); + *xp = gen_rtx_REG_offset (y, GET_MODE (x), regno, offset); } } |