[Bug tree-optimization/82217] ICE on valid code at -O1 and above: in visit_phi, at tree-ssa-sccvn.c:3908

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82217

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Sep 15 09:19:36 2017
New Revision: 252796

URL: https://gcc.gnu.org/viewcvs?rev=252796&root=gcc&view=rev
Log:
2017-09-15  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/82217
        * tree-ssa-sccvn.c (visit_phi): Properly handle all VN_TOP
        but not undefined case.

        * gcc.dg/torture/pr82217.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr82217.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c