* final.c (insn_last_address, insn_current_align, uid_align):
	New variables.
	(in_align_chain, align_fuzz, align_shrink_fuzz): New functions.
	(insn_current_reference_address): Likewise.
	(shorten_branches, final_scan_insn): Implement LABEL_ALIGN,
	LABEL_ALIGN_AFTER_BARRIER and LOOP_ALIGN target macros.
	(label_to_alignment): New function.
	* genattrtab.c (write_test_expr): If one of LABEL_ALIGN,
	LABEL_ALIGN_AFTER_BARRIER or LOOP_ALIGN is defined, call
	insn_current_reference_address instead of insn_current_address.
	(or_attr_value, write_length_unit_log): New functions.
	(main): Call write_length_unit_log.
	(write_const_num_delay_slots): Output extra '\n'.
	* alpha.h (ASM_OUTPUT_LOOP_ALIGN, ASM_OUTPUT_ALIGN_CODE):
	replace with:
	(LOOP_ALIGN, ALIGN_LABEL_AFTER_BARRIER).
	* i386.h, i386/osfrose.h, i386/svr3dbx.h, m68k.h, sparc.h: Likewise.
	* arc.h, m32r.h (ASM_OUTPUT_LOOP_ALIGN): replace with:
	(LOOP_ALIGN).
	* i960.h, m88k.h: (ASM_OUTPUT_ALIGN_CODE): Replace with:
	(LABEL_ALIGN_AFTER_BARRIER).
	* ns32k/encore.h, ns32k/merlin.h, ns32k.h, ns32k/sequent.h: Likewise.
	* ns32k/tek6000.h: Likewise.
	* i386/gas.h (ASM_OUTPUT_LOOP_ALIGN, ASM_OUTPUT_ALIGN_CODE): Delete.
	* i386.md (casesi+1): Use ASM_OUTPUT_ALIGN instead of
	ASM_OUTPUT_ALIGN_CODE.

From-SVN: r18357