[Bug tree-optimization/87177] [9 Regression] wrong code at -O2 and -O3 on x86-64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87177

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Sep  3 17:41:05 2018
New Revision: 264069

URL: https://gcc.gnu.org/viewcvs?rev=264069&root=gcc&view=rev
Log:
2018-09-03  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/87177
        * tree-ssa-sccvn.c (vuse_ssa_val): Revert previous change, keep
        cleanup.

        * gcc.dg/torture/pr87177.c: New testcase.
        * gcc.dg/torture/pr87177-2.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr87177-2.c
    trunk/gcc/testsuite/gcc.dg/torture/pr87177.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c