[Bug target/88547] missed optimization for vector comparisons

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88547

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 21 10:37:11 2018
New Revision: 267322

URL: https://gcc.gnu.org/viewcvs?rev=267322&root=gcc&view=rev
Log:
        PR target/88547
        * config/i386/i386.c (ix86_expand_int_sse_cmp): Optimize
        x > y ? 0 : -1 into min (x, y) == x ? -1 : 0.

        * gcc.target/i386/pr88547-1.c: Expect only 2 knotb and 2 knotw
        insns instead of 4, check for vpminud, vpminuq and no vpsubd or
        vpsubq.
        * gcc.target/i386/sse2-pr88547-1.c: New test.
        * gcc.target/i386/sse2-pr88547-2.c: New test.
        * gcc.target/i386/sse4_1-pr88547-1.c: New test.
        * gcc.target/i386/sse4_1-pr88547-2.c: New test.
        * gcc.target/i386/avx2-pr88547-1.c: New test.
        * gcc.target/i386/avx2-pr88547-2.c: New test.
        * gcc.target/i386/avx512f-pr88547-2.c: New test.
        * gcc.target/i386/avx512vl-pr88547-1.c: New test.
        * gcc.target/i386/avx512vl-pr88547-2.c: New test.
        * gcc.target/i386/avx512vl-pr88547-3.c: New test.
        * gcc.target/i386/avx512f_cond_move.c (y): Change from unsigned int
        array to int array.

Added:
    trunk/gcc/testsuite/gcc.target/i386/avx2-pr88547-1.c
    trunk/gcc/testsuite/gcc.target/i386/avx2-pr88547-2.c
    trunk/gcc/testsuite/gcc.target/i386/avx512f-pr88547-2.c
    trunk/gcc/testsuite/gcc.target/i386/avx512vl-pr88547-1.c
    trunk/gcc/testsuite/gcc.target/i386/avx512vl-pr88547-2.c
    trunk/gcc/testsuite/gcc.target/i386/avx512vl-pr88547-3.c
    trunk/gcc/testsuite/gcc.target/i386/sse2-pr88547-1.c
    trunk/gcc/testsuite/gcc.target/i386/sse2-pr88547-2.c
    trunk/gcc/testsuite/gcc.target/i386/sse4_1-pr88547-1.c
    trunk/gcc/testsuite/gcc.target/i386/sse4_1-pr88547-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/i386/avx512f_cond_move.c
    trunk/gcc/testsuite/gcc.target/i386/pr88547-1.c