rs6000.c (rs6000_emit_prologue_move_from_cr): Rename from rs6000_emit_move_from_cr and call renamed function.

	* config/rs6000/rs6000.c (rs6000_emit_prologue_move_from_cr): Rename from
	rs6000_emit_move_from_cr and call renamed function.
	(rs6000_emit_prologue): Call renamed functions.
	* config/rs6000/rs6000.md (prologue_movesi_from_cr): Rename from
	movesi_from_cr, remove volatile CRs.

	* gcc.target/powerpc/cr_shrink-wrap.c: New.

From-SVN: r251543