r122985 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Fri Mar 16 10:11:14 2007
New Revision: 122985

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=122985
Log:
2007-03-16  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/31146
	* tree-ssa-forwprop.c (forward_propagate_addr_expr_1): Restructure
	to allow recursion of forward_propagate_addr_expr.
	(forward_propagate_addr_into_variable_array_index): Likewise.
	(forward_propagate_addr_expr): Likewise.
	(tree_ssa_forward_propagate_single_use_vars): Likewise.
	(forward_propagate_addr_expr_1): Recurse on simple copies
	instead of propagating into them.  Do so for useless conversions
	as well.
	(forward_propagate_addr_expr): Clean up unused statements after
	recursion.

	* g++.dg/tree-ssa/pr31146.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/tree-ssa/pr31146.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-forwprop.c