re PR tree-optimization/41857 (Loop optimizer breaks __ea pointers with -mea64)

re PR tree-optimization/41857 (Loop optimizer breaks __ea pointers with -mea64)

gcc/
	PR tree-optimization/41857
	* tree-flow.h (rewrite_use_address): Add BASE_HINT argument.
	* tree-ssa-loop-ivopts.c (rewrite_use_address): Pass base hint
	to create_mem_ref.
	* tree-ssa-address.c (move_hint_to_base): New function.
	(most_expensive_mult_to_index): Add TYPE argument.  Use mode and
	address space associated with TYPE.
	(addr_to_parts): Add TYPE and BASE_HINT arguments.  Pass TYPE to
	most_expensive_mult_to_index.  Call move_hint_to_base.
	(create_mem_ref): Add BASE_HINT argument.  Pass BASE_HINT and
	TYPE to addr_to_parts.

gcc/testsuite/
	PR tree-optimization/41857
	* gcc.target/spu/ea/pr41857.c: New file.

From-SVN: r153810