[Bug debug/83621] [8 Regression] ICE: in simplify_subreg, at simplify-rtx.c:6293 with -O -g

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83621

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jan  3 20:59:50 2018
New Revision: 256190

URL: https://gcc.gnu.org/viewcvs?rev=256190&root=gcc&view=rev
Log:
        PR debug/83621
        * cfgexpand.c (expand_debug_expr): Return NULL if mode is
        BLKmode for ternary, binary or unary expressions.

        * gcc.dg/pr83621.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr83621.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c
    trunk/gcc/testsuite/ChangeLog