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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/108699] gcc.c-torture/execute/builtin-bitops-1.c fails
 on power 9 BE
Date: Mon, 17 Apr 2023 09:06:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108699

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Kewen Lin <linkw@gcc.gnu.org=
>:

https://gcc.gnu.org/g:de8f86e151d29c6c2ebb224b5587284714cd6cfa

commit r12-9406-gde8f86e151d29c6c2ebb224b5587284714cd6cfa
Author: Kewen Lin <linkw@linux.ibm.com>
Date:   Mon Apr 3 21:47:44 2023 -0500

    rs6000: Fix vector parity support [PR108699]

    The failures on the original failed case builtin-bitops-1.c
    and the associated test case pr108699.c here show that the
    current support of parity vector mode is wrong on Power.
    The hardware insns vprtyb[wdq] which operate on the least
    significant bit of each byte per element, they doesn't match
    what RTL opcode parity needs, but the current implementation
    expands it with them wrongly.

    This patch is to fix the handling with one more insn vpopcntb.

            PR target/108699

    gcc/ChangeLog:

            * config/rs6000/altivec.md (*p9v_parity<mode>2): Rename to ...
            (rs6000_vprtyb<mode>2): ... this.
            * config/rs6000/rs6000-builtins.def (VPRTYBD): Replace parityv2=
di2
with
            rs6000_vprtybv2di2.
            (VPRTYBW): Replace parityv4si2 with rs6000_vprtybv4si2.
            (VPRTYBQ): Replace parityv1ti2 with rs6000_vprtybv1ti2.
            * config/rs6000/vector.md (parity<mode>2 with VEC_IP): Expand w=
ith
            popcountv16qi2 and the corresponding rs6000_vprtyb<mode>2.

    gcc/testsuite/ChangeLog:

            * gcc.target/powerpc/p9-vparity.c: Add scan-assembler-not for
vpopcntb
            to distinguish parity byte from parity.
            * gcc.target/powerpc/pr108699.c: New test.

    (cherry picked from commit cdd2d6643f7fef40e335a7027edfea7276cde608)=