* target-insns.def (allocate_stack, check_stack, probe_stack)
	(probe_stack_address, split_stack_prologue, split_stack_space_check):
	New targetm instruction patterns.
	* explow.c (allocate_dynamic_stack_space): Use them instead of
	HAVE_*/gen_* interface.
	(emit_stack_probe): Likewise.
	(probe_stack_range): Likewise.
	* function.c (thread_prologue_and_epilogue_insns): Likewise.

From-SVN: r225429