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| author | Tejas Belagod <tejas.belagod@arm.com> | 2024-09-02 20:53:42 +0530 |
|---|---|---|
| committer | Tejas Belagod <tejas.belagod@arm.com> | 2024-11-12 15:19:34 +0530 |
| commit | a552a808f004c90d6f880f296041d674bdc27eda (patch) | |
| tree | 8d94d25d46326ed1654988d9faa297181eec6c0d /gcc | |
| parent | 9a62c1495891032922af5bf9bd1906999cf63605 (diff) | |
| download | gcc-a552a808f004c90d6f880f296041d674bdc27eda.zip gcc-a552a808f004c90d6f880f296041d674bdc27eda.tar.gz gcc-a552a808f004c90d6f880f296041d674bdc27eda.tar.bz2 | |
rtl: Validate subreg info when optimizing vec_select.
When optimizing for NOPs in case of overlapping regs in VEC_SELECT expressions,
validate subreg data before using simplify_subreg_regno. There is no real
SUBREG rtx here, but a pseudo subreg call to check if subregs are possible.
gcc/ChangeLog:
* rtlanal.cc (set_noop_p): Validate subreg constraints before checking
for overlapping regs using simplify_subreg_regno.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/rtlanal.cc | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/rtlanal.cc b/gcc/rtlanal.cc index cb0c0c0..b58401e 100644 --- a/gcc/rtlanal.cc +++ b/gcc/rtlanal.cc @@ -1686,6 +1686,7 @@ set_noop_p (const_rtx set) } return REG_CAN_CHANGE_MODE_P (REGNO (dst), GET_MODE (src0), GET_MODE (dst)) + && validate_subreg (GET_MODE (dst), GET_MODE (src0), src0, offset) && simplify_subreg_regno (REGNO (src0), GET_MODE (src0), offset, GET_MODE (dst)) == (int) REGNO (dst); } |