* doc/md.texi (Standard Names): Document probe_stack_address.
	* explow.c (emit_stack_probe): Handle probe_stack_address.
	* config/ia64/ia64.md (UNSPECV_PROBE_STACK_ADDRESS): New constant.
	(UNSPECV_PROBE_STACK_RANGE): Likewise.
	(probe_stack_address): New insn.
	(probe_stack_range): Likewise.
	* config/ia64/ia64.c: Include common/common-target.h.
	(ia64_compute_frame_size): Mark r2 and r3 as used if static stack
	checking is enabled.
	(ia64_emit_probe_stack_range): New function.
	(output_probe_stack_range): Likewise.
	(ia64_expand_prologue): Invoke ia64_emit_probe_stack_range if static
	builtin stack checking is enabled.
	(rtx_needs_barrier) <UNSPEC_VOLATILE>: Handle UNSPECV_PROBE_STACK_RANGE
	and UNSPECV_PROBE_STACK_ADDRESS.
	(unknown_for_bundling_p): New predicate.
	(group_barrier_needed): Use important_for_bundling_p.
	(ia64_dfa_new_cycle): Use unknown_for_bundling_p.
	(issue_nops_and_insn): Likewise.
	(bundling): Likewise.
	(final_emit_insn_group_barriers): Likewise.
	* config/ia64/ia64-protos.h (output_probe_stack_range): Declare.
	* config/ia64/hpux.h (STACK_CHECK_STATIC_BUILTIN): Define.
	(STACK_CHECK_PROTECT): Likewise.
	* config/ia64/linux.h (STACK_CHECK_STATIC_BUILTIN): Likewise.

Co-Authored-By: Tristan Gingold <gingold@adacore.com>

From-SVN: r187383