* config/i386/cygming.h (STACK_CHECK_STATIC_BUILTIN): Define to 1.
	* config/i386/freebsd.h (STACK_CHECK_STATIC_BUILTIN): Likewise.
	* config/i386/linux.h (STACK_CHECK_STATIC_BUILTIN): Likewise.
	* config/i386/linux64.h (STACK_CHECK_STATIC_BUILTIN): Likewise.
	* config/i386/sol2.h (STACK_CHECK_STATIC_BUILTIN): Likewise.
	* config/i386/i386.c (ix86_gen_adjust_stack_and_probe): New variable.
	(ix86_gen_probe_stack_range): Likewise.
	(override_options): Set them.
	(ix86_target_stack_probe): New function.
	(ix86_compute_frame_layout): Force use of push instructions to
	save registers if stack checking with probes is enabled.
	(get_scratch_register_on_entry): New function.
	(release_scratch_register_on_entry): Likewise.
	(ix86_adjust_stack_and_probe): Likewise.
	(output_adjust_stack_and_probe): Likewise.
	(ix86_emit_probe_stack_range): Likewise.
	(output_probe_stack_range): Likewise.
	(ix86_expand_prologue): Emit stack checking code if static built-in
	stack checking is enabled.
	Test ix86_target_stack_probe instead of TARGET_STACK_PROBE.
	* config/i386/i386-protos.h (ix86_target_stack_probe): Declare.
	(output_adjust_stack_and_probe): Likewise.
	(output_probe_stack_range): Likewise.
	* config/i386/i386.md (UNSPECV_PROBE_STACK_RANGE): New constant.
	(allocate_stack_worker_32): Test ix86_target_stack_probe instead of
	TARGET_STACK_PROBE.
	(allocate_stack_worker_64): Likewise.
	(allocate_stack): Likewise.
	(adjust_stack_and_probe): New insn.
	(probe_stack_range): Likewise.

From-SVN: r161952