[Bug target/92908] [10 Regression] wrong code with -Og -fno-tree-fre -mavx512bw and vector compare

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92908

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 13 10:12:55 2019
New Revision: 279369

URL: https://gcc.gnu.org/viewcvs?rev=279369&root=gcc&view=rev
Log:
        PR target/92908
        * simplify-rtx.c (simplify_relational_operation): Punt for vector
        cmp_mode and scalar mode, if simplify_relational_operation returned
        const_true_rtx.
        (simplify_const_relational_operation): Change VOID_mode in function
        comment to VOIDmode.

        * gcc.target/i386/avx512bw-pr92908.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/avx512bw-pr92908.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/simplify-rtx.c
    trunk/gcc/testsuite/ChangeLog