PR rtl-optimization/58668

	* cfgcleanup.c (flow_find_cross_jump): Don't count
	any jumps if dir_p is NULL.  Remove p1 variable, use active_insn_p
	to determine what is counted.
	(flow_find_head_matching_sequence): Use active_insn_p to determine
	what is counted.
	(try_head_merge_bb): Adjust for the flow_find_head_matching_sequence
	counting change.
	* ifcvt.c (count_bb_insns): Use active_insn_p && !JUMP_P to
	determine what is counted.

	* gcc.dg/pr58668.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@206385 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 10 insertions, 14 deletions

diff --git a/gcc/cfgcleanup.c b/gcc/cfgcleanup.c
index e2e407bd2de..028f8288662 100644
--- a/gcc/cfgcleanup.c
+++ b/gcc/cfgcleanup.c
@@ -1295,7 +1295,6 @@ flow_find_cross_jump (basic_block bb1, basic_block bb2, rtx *f1, rtx *f2,
 {
   rtx i1, i2, last1, last2, afterlast1, afterlast2;
   int ninsns = 0;
-  rtx p1;
   enum replace_direction dir, last_dir, afterlast_dir;
   bool follow_fallthru, did_fallthru;
 
@@ -1323,8 +1322,9 @@ flow_find_cross_jump (basic_block bb1, basic_block bb2, rtx *f1, rtx *f2,
       || (returnjump_p (i2) && !side_effects_p (PATTERN (i2))))
     {
       last2 = i2;
-      /* Count everything except for unconditional jump as insn.  */
-      if (!simplejump_p (i2) && !returnjump_p (i2) && last1)
+      /* Count everything except for unconditional jump as insn.
+	 Don't count any jumps if dir_p is NULL.  */
+      if (!simplejump_p (i2) && !returnjump_p (i2) && last1 && dir_p)
 	ninsns++;
       i2 = PREV_INSN (i2);
     }
@@ -1375,8 +1375,7 @@ flow_find_cross_jump (basic_block bb1, basic_block bb2, rtx *f1, rtx *f2,
 	  last1 = i1, last2 = i2;
 	  afterlast_dir = last_dir;
 	  last_dir = dir;
-	  p1 = PATTERN (i1);
-	  if (!(GET_CODE (p1) == USE || GET_CODE (p1) == CLOBBER))
+	  if (active_insn_p (i1))
 	    ninsns++;
 	}
 
@@ -1494,7 +1493,8 @@ flow_find_head_matching_sequence (basic_block bb1, basic_block bb2, rtx *f1,
 
 	  beforelast1 = last1, beforelast2 = last2;
 	  last1 = i1, last2 = i2;
-	  ninsns++;
+	  if (active_insn_p (i1))
+	    ninsns++;
 	}
 
       if (i1 == BB_END (bb1) || i2 == BB_END (bb2)
@@ -2408,9 +2408,7 @@ try_head_merge_bb (basic_block bb)
       max_match--;
       if (max_match == 0)
 	return false;
-      do
-	e0_last_head = prev_real_insn (e0_last_head);
-      while (DEBUG_INSN_P (e0_last_head));
+      e0_last_head = prev_active_insn (e0_last_head);
     }
 
   if (max_match == 0)
@@ -2430,16 +2428,14 @@ try_head_merge_bb (basic_block bb)
       basic_block merge_bb = EDGE_SUCC (bb, ix)->dest;
       rtx head = BB_HEAD (merge_bb);
 
-      while (!NONDEBUG_INSN_P (head))
-	head = NEXT_INSN (head);
+      if (!active_insn_p (head))
+	head = next_active_insn (head);
       headptr[ix] = head;
       currptr[ix] = head;
 
       /* Compute the end point and live information  */
       for (j = 1; j < max_match; j++)
-	do
-	  head = NEXT_INSN (head);
-	while (!NONDEBUG_INSN_P (head));
+	head = next_active_insn (head);
       simulate_backwards_to_point (merge_bb, live, head);
       IOR_REG_SET (live_union, live);
     }