From mboxrd@z Thu Jan  1 00:00:00 1970
From: Richard Henderson <rth@cygnus.com>
To: law@cygnus.com, egcs@cygnus.com
Subject: splitting before sched2
Date: Sat, 04 Apr 1998 16:52:00 -0000
Message-id: <19980404120552.48484@dot.cygnus.com>
X-SW-Source: 1998-04/msg00161.html

On Alpha at least there are a number of splits that are only enabled
after reload is complete.  I could have sworn other machines did this
as well.  My problem is that Haifa only tries splitting once, usually
before reload. 

The question is, should we just remove/disable the test, or should we
come up with some genconfig test that determines if the second pass is
necessary.  Possibly by seeing if any predicate contains the string
"reload".


r~



Index: haifa-sched.c
===================================================================
RCS file: /egcs/carton/cvsfiles/egcs/gcc/haifa-sched.c,v
retrieving revision 1.34
diff -c -p -d -r1.34 haifa-sched.c
*** haifa-sched.c	1998/03/28 23:45:08	1.34
--- haifa-sched.c	1998/04/04 19:58:04
*************** split_block_insns (b)
*** 8278,8284 ****
        /* It is probably not worthwhile to try to split again in
  	 the second pass.  However, if flag_schedule_insns is not set,
  	 the first and only (if any) scheduling pass is after reload.  */
!       if (reload_completed == 0 || ! flag_schedule_insns)
  	{
  	  rtx last, first = PREV_INSN (insn);
  	  rtx notes = REG_NOTES (insn);
--- 8278,8286 ----
        /* It is probably not worthwhile to try to split again in
  	 the second pass.  However, if flag_schedule_insns is not set,
  	 the first and only (if any) scheduling pass is after reload.  */
!       /* ??? Well, no, there are on some machines certain splits that are
! 	 enabled *only* after reload is complete.  */
!       if (1 || reload_completed == 0 || ! flag_schedule_insns)
  	{
  	  rtx last, first = PREV_INSN (insn);
  	  rtx notes = REG_NOTES (insn);