r255682 - in /branches/gcc-7-branch/gcc: Change...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Fri Dec 15 10:12:08 2017
New Revision: 255682

URL: https://gcc.gnu.org/viewcvs?rev=255682&root=gcc&view=rev
Log:
2017-12-15  Richard Biener  <rguenther@suse.de>

	Backport from mainline
	PR tree-optimization/82060
	* tree-ssa-pre.c (eliminate_dom_walker::before_dom_children):
	Move devirtualization after stmt folding and before EH/AB/noreturn
	cleanup to get the stmt refs canonicalized.  Use a bool instead
	of gimple_modified_p since that doesn't work for NOPs.  Schedule
	NOPs generated by folding for removal.

	* g++.dg/torture/pr82060.C: New testcase.

Added:
    branches/gcc-7-branch/gcc/testsuite/g++.dg/torture/pr82060.C
Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/testsuite/ChangeLog
    branches/gcc-7-branch/gcc/tree-ssa-pre.c