[Bug debug/83666] [8 Regression] ICE: SIGFPE with -O2 -g --param=sccvn-max-scc-size=10

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83666

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jan  4 11:44:07 2018
New Revision: 256232

URL: https://gcc.gnu.org/viewcvs?rev=256232&root=gcc&view=rev
Log:
        PR debug/83666
        * cfgexpand.c (expand_dbeug_expr) <case BIT_FIELD_REF>: Punt if mode
        is BLKmode and bitpos not zero or mode change is needed.

        * gcc.dg/pr83666.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr83666.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c
    trunk/gcc/testsuite/ChangeLog