[Bug tree-optimization/87168] [9 Regression] ICE on valid code at -Os and above on x86_64-linux-gnu: verify_ssa failed

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87168

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 31 16:50:13 2018
New Revision: 264021

URL: https://gcc.gnu.org/viewcvs?rev=264021&root=gcc&view=rev
Log:
2018-08-31  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/87168
        * tree-ssa-sccvn.c (SSA_VAL): Add visited output parameter.
        (rpo_elim::eliminate_avail): When OP was not visited it must
        be available.

        * gcc.dg/torture/pr87168.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr87168.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c