2013-07-21 Andrew Pinski <apinski@cavium.com>pinskia/newtreefold

	* gimple-ssa-combine.c: New file.
	* gimple-ssa-combine.h: New file.
	* Makefile.in (OBJS): Add gimple-ssa-combine.o.
	(gimple-ssa-combine.o): New target.
	* tree-ssa-forwprop.c: Include gimple-ssa-combine.h.
	(delete_dead_code_uptil): New function.
	(ssa_forward_propagate_and_combine): Create
	gimple_combine object and call combine on it.
	Assert if the combine does not find an optimization
	that forwprop's combiner does.

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