r245830 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Thu Mar  2 07:53:42 2017
New Revision: 245830

URL: https://gcc.gnu.org/viewcvs?rev=245830&root=gcc&view=rev
Log:
2017-03-02  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/79777
	* tree-ssa-pre.c (eliminate_insert): Give up if we simplify
	the to insert expression to sth existing.

	* gcc.dg/torture/pr79777.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr79777.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c