r234774 - in /branches/gcc-5-branch/gcc: Change...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Apr  6 07:57:47 2016
New Revision: 234774

URL: https://gcc.gnu.org/viewcvs?rev=234774&root=gcc&view=rev
Log:
2016-04-06  Richard Biener  <rguenther@suse.de>

	Backport from mainline
	2016-02-24  Richard Biener  <rguenther@suse.de>

	PR middle-end/68963
	* tree-ssa-loop-niter.c (derive_constant_upper_bound_ops): Fix
	bogus check.
	(record_nonwrapping_iv): Do not fall back to the low/high bound
	for non-constant IV bases if the stmt is not always executed.

	* gcc.dg/torture/pr68963.c: New testcase.

Added:
    branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr68963.c
Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/testsuite/ChangeLog
    branches/gcc-5-branch/gcc/tree-ssa-loop-niter.c