re PR middle-end/41047 (gcc.target/mips/memcpy-1.c failing)

2009-08-13  Richard Guenther  <rguenther@suse.de>

	PR middle-end/41047
	* tree-ssa-ccp.c (ccp_fold): When folding pointer additions
	use the constant pointer type.
	* gimplify.c (canonicalize_addr_expr): Canonicalize independent
	of CV qualifiers on the target pointer type.
	* tree-ssa.c (useless_type_conversion_p): Move incomplete pointer
	conversion check before restrict check.

	* gcc.dg/tree-ssa/ssa-ccp-27.c: New testcase.

From-SVN: r150715