re PR target/70062 (ICE: in decide_alg, at config/i386/i386.c:26173 with -mmemcpy...

re PR target/70062 (ICE: in decide_alg, at config/i386/i386.c:26173 with -mmemcpy-strategy=libcall)

	PR target/70062
	* config/i386/i386.c (decide_alg): Add RECUR argument.  Revert
	2016-02-22 changes, instead don't recurse if RECUR is already true.
	Don't change *dynamic_check if RECUR.  Adjust recursive caller
	to pass true to the new argument.
	(ix86_expand_set_or_movmem): Adjust decide_alg caller.

	* gcc.target/i386/pr70062.c: New test.

From-SVN: r233979