PR target/43636
	* builtins.c (expand_movstr): Use a temporary pseudo instead
	of target even when target is not NULL and not const0_rtx, but
	fails movstr predicate.
	* config/m32c/blkmov.md (movstr): Add predicate to first operand.

	* gcc.c-torture/compile/pr43636.c: New test.

From-SVN: r159972