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| author | Thomas Schwinge <thomas@codesourcery.com> | 2020-04-22 16:58:44 +0200 |
|---|---|---|
| committer | Thomas Schwinge <thomas@codesourcery.com> | 2020-04-29 09:44:36 +0200 |
| commit | f2c2eaaf8fb5c66ae372bb526b2b2fe67a9c5c39 (patch) | |
| tree | d2ec5ba46a34c5fff9f6f448d7aefbdc873158c5 /gcc/rtlanal.c | |
| parent | 7f1989249e25af6fc0f124452efa24b3796b767a (diff) | |
| download | gcc-f2c2eaaf8fb5c66ae372bb526b2b2fe67a9c5c39.zip gcc-f2c2eaaf8fb5c66ae372bb526b2b2fe67a9c5c39.tar.gz gcc-f2c2eaaf8fb5c66ae372bb526b2b2fe67a9c5c39.tar.bz2 | |
[rtl] Harden 'set_noop_p' for non-constant selectors [PR94279]
... given that the GCN target did away with the constant 'vec_select'
restriction.
gcc/
PR target/94279
* rtlanal.c (set_noop_p): Handle non-constant selectors.
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index c7ab86e..0ebde76 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -1631,12 +1631,18 @@ set_noop_p (const_rtx set) int i; rtx par = XEXP (src, 1); rtx src0 = XEXP (src, 0); - poly_int64 c0 = rtx_to_poly_int64 (XVECEXP (par, 0, 0)); + poly_int64 c0; + if (!poly_int_rtx_p (XVECEXP (par, 0, 0), &c0)) + return 0; poly_int64 offset = GET_MODE_UNIT_SIZE (GET_MODE (src0)) * c0; for (i = 1; i < XVECLEN (par, 0); i++) - if (maybe_ne (rtx_to_poly_int64 (XVECEXP (par, 0, i)), c0 + i)) - return 0; + { + poly_int64 c0i; + if (!poly_int_rtx_p (XVECEXP (par, 0, i), &c0i) + || maybe_ne (c0i, c0 + i)) + return 0; + } return REG_CAN_CHANGE_MODE_P (REGNO (dst), GET_MODE (src0), GET_MODE (dst)) && simplify_subreg_regno (REGNO (src0), GET_MODE (src0), |