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[Bug tree-optimization/81192] gcc ICE at -Os on x86_64-linux-gnu: Segmentation fault


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81192

--- Comment #19 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Thu Jul 13 05:42:15 2017
New Revision: 250175

URL: https://gcc.gnu.org/viewcvs?rev=250175&root=gcc&view=rev
Log:
Backport "Fix sigsegv in find_same_succ_bb"

2017-07-13  Tom de Vries  <tom@codesourcery.com>

        backport from mainline:
        2017-07-03  Tom de Vries  <tom@codesourcery.com>

        PR tree-optimization/81192
        * tree-ssa-tail-merge.c (same_succ_flush_bb): Handle
        BB_SAME_SUCC (bb) == NULL.

        * gcc.dg/pr81192.c: New test.

Added:
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr81192.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/testsuite/ChangeLog
    branches/gcc-6-branch/gcc/tree-ssa-tail-merge.c

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