* haifa-sched.c (sched_emit_insn): New.

        (schedule_block): Use last_scheduled_insn to track last insn.
        * sched-int.h (sched_emit_insn): Prototype.
        * config/ia64/ia64.c (last_issued): Remove.
        (ia64_variable_issue): Don't set it.
        (nop_cycles_until): Use sched_emit_insn.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@50153 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 20 insertions, 12 deletions

diff --git a/gcc/haifa-sched.c b/gcc/haifa-sched.c
index 150cb093e1c..686369d418f 100644
--- a/gcc/haifa-sched.c
+++ b/gcc/haifa-sched.c
@@ -1617,6 +1617,18 @@ move_insn (insn, last)
   return retval;
 }
 
+/* Called from backends from targetm.sched.reorder to emit stuff into
+   the instruction stream.  */
+
+rtx
+sched_emit_insn (pat)
+     rtx pat;
+{
+  rtx insn = emit_insn_after (pat, last_scheduled_insn);
+  last_scheduled_insn = insn;
+  return insn;
+}
+
 /* Use forward list scheduling to rearrange insns of block B in region RGN,
    possibly bringing insns from subsequent blocks in the same region.  */
 
@@ -1625,7 +1637,6 @@ schedule_block (b, rgn_n_insns)
      int b;
      int rgn_n_insns;
 {
-  rtx last;
   struct ready_list ready;
   int can_issue_more;
 
@@ -1673,8 +1684,8 @@ schedule_block (b, rgn_n_insns)
   if (targetm.sched.md_init)
     (*targetm.sched.md_init) (sched_dump, sched_verbose, ready.veclen);
 
-  /* No insns scheduled in this block yet.  */
-  last_scheduled_insn = 0;
+  /* We start inserting insns after PREV_HEAD.  */
+  last_scheduled_insn = prev_head;
 
   /* Initialize INSN_QUEUE.  Q_SIZE is the total number of insns in the
      queue.  */
@@ -1686,9 +1697,6 @@ schedule_block (b, rgn_n_insns)
   /* Start just before the beginning of time.  */
   clock_var = -1;
 
-  /* We start inserting insns after PREV_HEAD.  */
-  last = prev_head;
-
   /* Loop until all the insns in BB are scheduled.  */
   while ((*current_sched_info->schedule_more_p) ())
     {
@@ -1700,9 +1708,6 @@ schedule_block (b, rgn_n_insns)
          list.  */
       queue_to_ready (&ready);
 
-      if (sched_verbose && targetm.sched.cycle_display)
-	last = (*targetm.sched.cycle_display) (clock_var, last);
-
       if (ready.n_ready == 0)
 	abort ();
 
@@ -1725,6 +1730,10 @@ schedule_block (b, rgn_n_insns)
       else
 	can_issue_more = issue_rate;
 
+      if (sched_verbose && targetm.sched.cycle_display)
+	last_scheduled_insn
+	  = (*targetm.sched.cycle_display) (clock_var, last_scheduled_insn);
+
       if (sched_verbose)
 	{
 	  fprintf (sched_dump, "\n;;\tReady list (t =%3d):  ", clock_var);
@@ -1749,8 +1758,7 @@ schedule_block (b, rgn_n_insns)
 	  if (! (*current_sched_info->can_schedule_ready_p) (insn))
 	    goto next;
 
-	  last_scheduled_insn = insn;
-	  last = move_insn (insn, last);
+	  last_scheduled_insn = move_insn (insn, last_scheduled_insn);
 
 	  if (targetm.sched.variable_issue)
 	    can_issue_more =
@@ -1798,7 +1806,7 @@ schedule_block (b, rgn_n_insns)
 
   /* Update head/tail boundaries.  */
   head = NEXT_INSN (prev_head);
-  tail = last;
+  tail = last_scheduled_insn;
 
   /* Restore-other-notes: NOTE_LIST is the end of a chain of notes
      previously found among the insns.  Insert them at the beginning