i386 code label alignment patch (version 3)

[Jeffrey A Law]

  In message < 199805210416.AAA04149@jwlab.FEITH.COM >you write:
  > ChangeLog:
  > 
  > Wed May 20 23:44:28 EDT 1998  John Wehle  (john@feith.com)
  > 
  > 	* acconfig.h (HAVE_GAS_MAX_SKIP_P2ALIGN): New tag.
  > 	* configure.in: Check for it.
  > 	* i386/gas.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Use it.
  > 	* final.c (uid_align, uid_shuid, label_align): Make static.
  > 	(label_align): Change type to struct label_alignment pointer.
  > 	(LABEL_TO_ALIGNMENT, shorten_branches): Update due to type change.
  > 	(LABEL_TO_MAX_SKIP): Define.
  > 	(LABEL_ALIGN_MAX_SKIP, LOOP_ALIGN_MAX_SKIP,
  > 	LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP): Provide defaults.
  > 	(shorten_branches): Record the maximum bytes to skip when
  > 	aligning a label.
  > 	(final_scan_insn): Use the maximum bytes to skip when aligning a label
  > 	if ASM_OUTPUT_MAX_SKIP_ALIGN is available.
  > 	* i386.h (LOOP_ALIGN_MAX_SKIP,
  > 	LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP): Define.
  > 	* i386.c (override_options): i386_align_jumps and i386_align_loops
  > 	default to 4 if ASM_OUTPUT_MAX_SKIP_ALIGN is available.
  > 	* invoke.texi: Document new i386 align-loops and align-jumps behavior.
I've installed this patch.  Thanks!

Thanks to Ian too for the help sorting out the right approach for
the autoconf stuff.

jeff