r128236 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Fri Sep  7 10:31:09 2007
New Revision: 128236

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=128236
Log:
2007-09-07  Richard Guenther  <rguenther@suse.de>
 
        Revert
        2007-09-06  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/32586
	* tree-ssa-sccvn.c (simplify_binary_expression): Avoid
	folding if nothing changed.
	(simplify_unary_expression): New function.  Do tree combining
	on conversion like codes.
	(try_to_simplify): Call it.

	* g++.dg/tree-ssa/pr27090.C: Remove XFAILs.
	* gcc.dg/tree-ssa/ssa-fre-1.c: Likewise.
	* gcc.dg/tree-ssa/ssa-fre-3.c: Likewise.
	* gcc.dg/tree-ssa/ssa-fre-5.c: Likewise.
	* gcc.dg/tree-ssa/ssa-fre-4.c: Likewise, remove scan for
	now obsolete simplification.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/tree-ssa/pr27090.C
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-3.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-4.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-5.c
    trunk/gcc/tree-ssa-sccvn.c