r209862 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Mon Apr 28 14:07:51 2014
New Revision: 209862

URL: http://gcc.gnu.org/viewcvs?rev=209862&root=gcc&view=rev
Log:
2014-04-28  Richard Biener  <rguenther@suse.de>

	* tree-vrp.c (vrp_var_may_overflow): Remove.
	(vrp_visit_phi_node): Rather than bumping to +-INF possibly
	with overflow immediately bump to one before that value and
	let iteration figure out overflow status.

	* gcc.dg/tree-ssa/vrp91.c: New testcase.
	* gcc.dg/Wstrict-overflow-14.c: XFAIL.
	* gcc.dg/Wstrict-overflow-15.c: Likewise.
	* gcc.dg/Wstrict-overflow-18.c: Remove XFAIL.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp91.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/Wstrict-overflow-14.c
    trunk/gcc/testsuite/gcc.dg/Wstrict-overflow-15.c
    trunk/gcc/testsuite/gcc.dg/Wstrict-overflow-18.c
    trunk/gcc/tree-vrp.c