diff options
Diffstat (limited to 'gcc/ifcvt.c')
| -rw-r--r-- | gcc/ifcvt.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c index 4a277db..fd29516 100644 --- a/gcc/ifcvt.c +++ b/gcc/ifcvt.c @@ -3339,9 +3339,15 @@ bb_ok_for_noce_convert_multiple_sets (basic_block test_bb, rtx src = SET_SRC (set); /* We can possibly relax this, but for now only handle REG to REG - moves. This avoids any issues that might come from introducing - loads/stores that might violate data-race-freedom guarantees. */ - if (!(REG_P (src) && REG_P (dest))) + (including subreg) moves. This avoids any issues that might come + from introducing loads/stores that might violate data-race-freedom + guarantees. */ + if (!REG_P (dest)) + return false; + + if (!(REG_P (src) + || (GET_CODE (src) == SUBREG && REG_P (SUBREG_REG (src)) + && subreg_lowpart_p (src)))) return false; /* Destination must be appropriate for a conditional write. */ |