re PR tree-optimization/33512 (Simple bitwise simplification missed)

re PR tree-optimization/33512 (Simple bitwise simplification missed)

2012-04-24  Andrew Pinski  <apinski@cavium.com>

	PR tree-opt/33512
	* tree-ssa-forwprop.c (defcodefor_name): New function.
	(simplify_bitwise_binary): Use defcodefor_name instead of manually
	Simplify "( X | Y) & X" to X and "( X & Y) | X" to X.
	Simplify "(~X | Y) & X" to "X & Y" and
	"(~X & Y) | X" to "X | Y".

2012-04-24  Andrew Pinski  <apinski@cavium.com>

	PR tree-opt/33512
	* gcc.dg/tree-ssa/andor-3.c: New testcase.
	* gcc.dg/tree-ssa/andor-4.c: New testcase.
	* gcc.dg/tree-ssa/andor-5.c: New testcase.

From-SVN: r186749