2011-05-30 Richard Guenther <rguenther@suse.de>

2011-05-30  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-forwprop.c (forward_propagate_into_comparison):
	New function split out from ...
	(forward_propagate_into_gimple_cond): ... here.  Adjust.
	(forward_propagate_into_cond): Likewise.
	(forward_propagate_comparison): Also propagate into
	comparisons on assignment RHS.  Change return value to
	behave similar to forward_propagate_into_cond.
	(tree_ssa_forward_propagate_single_use_vars): Handle
	strict-overflow warnings properly for forward_propagate_comparison.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@174428 138bc75d-0d04-0410-961f-82ee72b054a4