[Bug rtl-optimization/83682] [8 Regression] ICE in simplify_subreg, at simplify-rtx.c:6296

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83682

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Jan  6 07:47:32 2018
New Revision: 256308

URL: https://gcc.gnu.org/viewcvs?rev=256308&root=gcc&view=rev
Log:
        PR rtl-optimization/83682
        * rtl.h (const_vec_duplicate_p): Only return true for VEC_DUPLICATE
        if it has non-VECTOR_MODE element mode.
        (vec_duplicate_p): Likewise.

        * gcc.target/i386/pr83682.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr83682.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/rtl.h
    trunk/gcc/testsuite/ChangeLog