r176517 - in /trunk/gcc: ChangeLog tree-ssa-for...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Jul 20 15:13:58 2011
New Revision: 176517

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176517
Log:
2011-07-20  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-forwprop.c (remove_prop_source_from_use): Robustify
	against already removed statements.
	(forward_propagate_into_comparison): Remove dead defining stmts.
	(forward_propagate_into_gimple_cond): Likewise.
	(forward_propagate_into_cond): Simplify.
	(ssa_forward_propagate_and_combine): Handle changed cfg from
	forward_propagate_into_comparison.
	* tree-ssa-phiopt.c (conditional_replacement): Use proper
	locations for newly built statements.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-forwprop.c
    trunk/gcc/tree-ssa-phiopt.c