r249113 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Mon Jun 12 10:42:57 2017
New Revision: 249113

URL: https://gcc.gnu.org/viewcvs?rev=249113&root=gcc&view=rev
Log:
2017-06-12  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/81053
	* tree-vect-loop.c (vect_is_simple_reduction): Handle PHI
	with backedge value not defined in loop.  Simplify def stmt
	compute.

	* gcc.dg/torture/pr81053.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr81053.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-loop.c