r139061 - in /trunk/gcc: ChangeLog gimplify.c t...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Aug 13 14:22:19 2008
New Revision: 139061

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=139061
Log:
2008-08-13  Richard Guenther  <rguenther@suse.de>

	* tree.h (maybe_fold_offset_to_address): Declare.
	* tree-ssa-ccp.c (surely_varying_stmt_p): Fix typo in last commit.
	(ccp_fold): Handle pointer conversions the same as fold_stmt.
	Likewise for POINTER_PLUS_EXPR.
	(maybe_fold_offset_to_reference): Enable disabled code.
	(maybe_fold_offset_to_address): New function.
	(fold_stmt_r): Use it.
	(fold_gimple_assign): Likewise.
	* gimplify.c (gimplify_conversion): Use maybe_fold_offset_to_address.
	(gimplify_expr): Likewise.

	* gcc.dg/tree-ssa/ssa-ccp-21.c: New testcase.
	* gcc.dg/tree-ssa/ssa-ccp-22.c: Likewise.
	* gcc.dg/tree-ssa/ssa-ccp-23.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-21.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-22.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-23.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimplify.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c
    trunk/gcc/tree.h