r196379 - in /branches/gcc-4_7-branch/gcc: Chan...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Fri Mar  1 13:55:11 2013
New Revision: 196379

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196379
Log:
2013-03-01  Richard Biener  <rguenther@suse.de>

	Backport from mainline
	2012-12-12  Zdenek Dvorak  <ook@ucw.cz>

	PR tree-optimization/55481
	* tree-ssa-loop-ivopts.c (rewrite_use_nonlinear_expr): Fall
	back to general rewriting if we cannot leave an original biv
	definition alone.

	* gcc.dg/torture/pr55481.c: New testcase.
	* gcc.dg/torture/pr56488.c: Likewise.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/torture/pr55481.c
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/torture/pr56488.c
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_7-branch/gcc/tree-ssa-loop-ivopts.c