[Bug tree-optimization/77514] [6 Regression] ICE in VN_INFO_GET, at tree-ssa-sccvn.c:406 w/ -O2 (and above)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77514

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Sep 15 07:17:45 2016
New Revision: 240153

URL: https://gcc.gnu.org/viewcvs?rev=240153&root=gcc&view=rev
Log:
2016-09-15  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/77514
        * tree-ssa-pre.c (create_expression_by_pieces): Handle garbage
        only forced_stmts sequence.

        * gcc.dg/torture/pr77514.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr77514.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c