re PR debug/45136 (-fcompare-debug failure with -Os -fschedule-insns)

PR debug/45136
PR debug/45130
* haifa-sched.c (get_ebb_head_tail): Move notes across boundary
debug insns.
(no_real_insns_p, schedule_block, set_priorities): Drop special
treatment of boundary debug insns.
* sched-deps.c (sd_init_insn, sd_finish_insn): Don't mark debug
insns.
* sched-ebb.c (schedule_ebbs): Don't skip debug insns.
* sched-int.h (DEBUG_INSN_SCHED_P): Remove.
(BOUNDARY_DEBUG_INSN_P): Likewise.
(SCHEDULE_DEBUG_INSN_P): Likewise.
* sched-rgn.c (init_ready_list): Drop special treatment of
boundary debug insns.
* final.c (rest_of_clean-state): Clear notes' BB.

From-SVN: r169260

1 files changed, 52 insertions, 6 deletions

diff --git a/gcc/haifa-sched.c b/gcc/haifa-sched.c
index bd3b84c..68499f1 100644
--- a/gcc/haifa-sched.c
+++ b/gcc/haifa-sched.c
@@ -1900,8 +1900,30 @@ get_ebb_head_tail (basic_block beg, basic_block end, rtx *headp, rtx *tailp)
     beg_head = NEXT_INSN (beg_head);
 
   while (beg_head != beg_tail)
-    if (NOTE_P (beg_head) || BOUNDARY_DEBUG_INSN_P (beg_head))
+    if (NOTE_P (beg_head))
       beg_head = NEXT_INSN (beg_head);
+    else if (DEBUG_INSN_P (beg_head))
+      {
+	rtx note, next;
+
+	for (note = NEXT_INSN (beg_head);
+	     note != beg_tail;
+	     note = next)
+	  {
+	    next = NEXT_INSN (note);
+	    if (NOTE_P (note))
+	      {
+		if (sched_verbose >= 9)
+		  fprintf (sched_dump, "reorder %i\n", INSN_UID (note));
+
+		reorder_insns_nobb (note, note, PREV_INSN (beg_head));
+	      }
+	    else if (!DEBUG_INSN_P (note))
+	      break;
+	  }
+
+	break;
+      }
     else
       break;
 
@@ -1913,8 +1935,33 @@ get_ebb_head_tail (basic_block beg, basic_block end, rtx *headp, rtx *tailp)
     end_head = NEXT_INSN (end_head);
 
   while (end_head != end_tail)
-    if (NOTE_P (end_tail) || BOUNDARY_DEBUG_INSN_P (end_tail))
+    if (NOTE_P (end_tail))
       end_tail = PREV_INSN (end_tail);
+    else if (DEBUG_INSN_P (end_tail))
+      {
+	rtx note, prev;
+
+	for (note = PREV_INSN (end_tail);
+	     note != end_head;
+	     note = prev)
+	  {
+	    prev = PREV_INSN (note);
+	    if (NOTE_P (note))
+	      {
+		if (sched_verbose >= 9)
+		  fprintf (sched_dump, "reorder %i\n", INSN_UID (note));
+
+		reorder_insns_nobb (note, note, end_tail);
+
+		if (end_tail == BB_END (end))
+		  df_insn_change_bb (note, NULL);
+	      }
+	    else if (!DEBUG_INSN_P (note))
+	      break;
+	  }
+
+	break;
+      }
     else
       break;
 
@@ -1928,8 +1975,7 @@ no_real_insns_p (const_rtx head, const_rtx tail)
 {
   while (head != NEXT_INSN (tail))
     {
-      if (!NOTE_P (head) && !LABEL_P (head)
-	  && !BOUNDARY_DEBUG_INSN_P (head))
+      if (!NOTE_P (head) && !LABEL_P (head))
 	return 0;
       head = NEXT_INSN (head);
     }
@@ -2812,7 +2858,7 @@ schedule_block (basic_block *target_bb)
   last_scheduled_insn = prev_head;
 
   gcc_assert ((NOTE_P (last_scheduled_insn)
-	       || BOUNDARY_DEBUG_INSN_P (last_scheduled_insn))
+	       || DEBUG_INSN_P (last_scheduled_insn))
 	      && BLOCK_FOR_INSN (last_scheduled_insn) == *target_bb);
 
   /* Initialize INSN_QUEUE.  Q_SIZE is the total number of insns in the
@@ -3319,7 +3365,7 @@ set_priorities (rtx head, rtx tail)
 	current_sched_info->sched_max_insns_priority;
   rtx prev_head;
 
-  if (head == tail && (! INSN_P (head) || BOUNDARY_DEBUG_INSN_P (head)))
+  if (head == tail && ! INSN_P (head))
     gcc_unreachable ();
 
   n_insn = 0;