2014-01-29  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/58742
	* tree-ssa-forwprop.c (associate_pointerplus): Rename to
	associate_pointerplus_align.
	(associate_pointerplus_diff): New function.
	(associate_pointerplus): Likewise.  Call associate_pointerplus_align
	and associate_pointerplus_diff.

	* gcc.dg/pr58742-1.c: New testcase.
	* gcc.dg/pr58742-2.c: Likewise.
	* gcc.dg/pr58742-3.c: Likewise.

From-SVN: r207239