[Bug tree-optimization/67191] [6 Regression] ICE: in before_dom_children, at tree-ssa-sccvn.c:4372

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67191

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Aug 13 09:39:50 2015
New Revision: 226854

URL: https://gcc.gnu.org/viewcvs?rev=226854&root=gcc&view=rev
Log:
2015-08-13  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/67191
        * tree-ssa-sccvn.c (sccvn_dom_walker::before_dom_children): Remove
        assert we value-numbered last stmts operand because it can validly
        trigger for unreachable code.

        * gcc.dg/torture/pr67191.c: New testcase.
        * g++.dg/torture/pr67191.C: Likewise.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr67191.C
    trunk/gcc/testsuite/gcc.dg/torture/pr67191.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c