r230150 - in /trunk/gcc: ChangeLog testsuite/Ch...

[jiwang@gcc.gnu.org]

Author: jiwang
Date: Wed Nov 11 10:51:31 2015
New Revision: 230150

URL: https://gcc.gnu.org/viewcvs?rev=230150&root=gcc&view=rev
Log:
[Patch] PR tree-optimization/68234 Improve range info for loop Phi node

2015-11-11  Richard Biener  <rguenth@gcc.gnu.org>
	    Jiong Wang      <jiong.wang@arm.com>
gcc/
  PR tree-optimization/68234
  * tree-vrp.c (vrp_visit_phi_node): Extend SCEV check to those loop PHI
  node which estimiated to be VR_VARYING initially.

gcc/testsuite/
  * gcc.dg/tree-ssa/pr68234.c: New testcase. 


Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr68234.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c