diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/rtlanal.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index 5ae38b7..01130a1 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -1619,6 +1619,10 @@ set_noop_p (const_rtx set) return 0; src = SUBREG_REG (src); dst = SUBREG_REG (dst); + if (GET_MODE (src) != GET_MODE (dst)) + /* It is hard to tell whether subregs refer to the same bits, so act + conservatively and return 0. */ + return 0; } /* It is a NOOP if destination overlaps with selected src vector |