[Bug target/81833] [7/8 Regression] PowerPC: VSX: Miscompiles ffmpeg's scalarproduct_int16_vsx at -O1

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81833

--- Comment #8 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Tue Sep 12 21:07:30 2017
New Revision: 252044

URL: https://gcc.gnu.org/viewcvs?rev=252044&root=gcc&view=rev
Log:
[gcc]

2017-09-12  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        Backport from mainline
        2017-09-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        PR target/81833
        * config/rs6000/altivec.md (altivec_vsum2sws): Convert from a
        define_insn to a define_expand.
        (altivec_vsum2sws_direct): New define_insn.
        (altivec_vsumsws): Convert from a define_insn to a define_expand.

[gcc/testsuite]

2017-09-12  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        Backport from mainline
        2017-09-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        PR target/81833
        * gcc.target/powerpc/pr81833-1.c: New file.
        * gcc.target/powerpc/pr81833-2.c: New file.


Added:
    branches/gcc-5-branch/gcc/testsuite/gcc.target/powerpc/pr81833-1.c
    branches/gcc-5-branch/gcc/testsuite/gcc.target/powerpc/pr81833-2.c
Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/config/rs6000/altivec.md
    branches/gcc-5-branch/gcc/testsuite/ChangeLog