[Bug target/81572] [7 Regression] gcc-7 regression: unnecessary vector regmove on compare

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81572

--- Comment #7 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Tue Mar  6 15:54:30 2018
New Revision: 258280

URL: https://gcc.gnu.org/viewcvs?rev=258280&root=gcc&view=rev
Log:
gcc/
        Backport from mainline
        2018-02-22  Vladimir Makarov  <vmakarov@redhat.com>

        PR target/81572
        * lra-int.h (LRA_UNKNOWN_ALT, LRA_NON_CLOBBERED_ALT): New macros.
        * lra.c (lra_set_insn_recog_data, lra_update_insn_recog_data): Use
        LRA_UNKNOWN_ALT.
        * lra-constraints.c (curr_insn_transform): Set up
        LRA_NON_CLOBBERED_ALT for moves processed on the fast path.  Use
        LRA_UNKNOWN_ALT.
        (remove_inheritance_pseudos): Use LRA_UNKNOWN_ALT.
        * lra-eliminations.c (spill_pseudos): Ditto.
        (process_insn_for_elimination): Ditto.
        * lra-lives.c (reg_early_clobber_p): Use the new macros.
        * lra-spills.c (spill_pseudos): Use LRA_UNKNOWN_ALT and
        LRA_NON_CLOBBERED_ALT.

gcc/testsuite/
        Backport from mainline
        2018-02-22  Vladimir Makarov  <vmakarov@redhat.com>

        PR target/81572
        * gcc.target/powerpc/pr81572.c: New.

Added:
    branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr81572.c
Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/lra-constraints.c
    branches/gcc-7-branch/gcc/lra-eliminations.c
    branches/gcc-7-branch/gcc/lra-int.h
    branches/gcc-7-branch/gcc/lra-lives.c
    branches/gcc-7-branch/gcc/lra-spills.c
    branches/gcc-7-branch/gcc/lra.c
    branches/gcc-7-branch/gcc/testsuite/ChangeLog