[Bug target/77834] [7 Regression] ICE: in make_decl_rtl, at varasm.c:1311 with -O -ftree-pre -mstringop-strategy=libcall

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77834

--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Dec  7 22:47:48 2016
New Revision: 243398

URL: https://gcc.gnu.org/viewcvs?rev=243398&root=gcc&view=rev
Log:
        Backported from mainline
        2016-11-04  Jakub Jelinek  <jakub@redhat.com>

        PR target/77834
        * alias.c (nonoverlapping_memrefs_p): Return 0 if exprx or expry
        doesn't have rtl set.

        * gcc.dg/pr77834.c: New test.

Added:
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr77834.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/alias.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog