[Bug target/83687] [6 Regression] ARM NEON invalid optimisation for vabd/vabdl

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83687

--- Comment #6 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Fri May 11 09:35:31 2018
New Revision: 260159

URL: https://gcc.gnu.org/viewcvs?rev=260159&root=gcc&view=rev
Log:
[arm] PR target/83687: Fix invalid combination of VSUB + VABS into VABD

        PR target/83687
        * config/arm/neon.md (neon_vabd<mode>_2): Use VCVTF mode iterator.
        Remove integer-related logic from pattern.
        (neon_vabd<mode>_3): Likewise.

        * gcc.target/arm/neon-combine-sub-abs-into-vabd.c: Delete integer
        tests.
        * gcc.target/arm/pr83687.c: New test.

Added:
    branches/gcc-6-branch/gcc/testsuite/gcc.target/arm/pr83687.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/config/arm/neon.md
    branches/gcc-6-branch/gcc/testsuite/ChangeLog
   
branches/gcc-6-branch/gcc/testsuite/gcc.target/arm/neon-combine-sub-abs-into-vabd.c