r196170 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Feb 20 11:39:39 2013
New Revision: 196170

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196170
Log:
2013-02-20  Richard Biener  <rguenther@suse.de>
	Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/56396
	* tree-ssa-ccp.c (n_const_val): New static variable.
	(get_value): Return NULL for SSA names we don't have a lattice
	entry for.
	(ccp_initialize): Initialize n_const_val.
	* tree-ssa-copy.c (n_copy_of): New static variable.
	(init_copy_prop): Initialize n_copy_of.
	(get_value): Return NULL_TREE for SSA names we don't have a
	lattice entry for.

	* gcc.dg/pr56396.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/pr56396.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c
    trunk/gcc/tree-ssa-copy.c