From: Richard Kenner <kenner@gcc.gnu.org>
Date: Tue, 23 Nov 1993 23:05:04 +0000 (-0500)
Subject: (rare_destination): Ensure we always correctly handle a null
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=65753f559890e97f7d0296a6558300dc9ee98e23;p=gcc.git

(rare_destination): Ensure we always correctly handle a null
JUMP_LABEL.

From-SVN: r6150
---

diff --git a/gcc/reorg.c b/gcc/reorg.c
index 515964ce0c6..d62fd2d4cbd 100644
--- a/gcc/reorg.c
+++ b/gcc/reorg.c
@@ -1239,7 +1239,7 @@ get_jump_flags (insn, label)
   return flags;
 }
 
-/* Return 1 if DEST is a destination that will be branched to rarely (the
+/* Return 1 if INSN is a destination that will be branched to rarely (the
    return point of a function); return 2 if DEST will be branched to very
    rarely (a call to a function that doesn't return).  Otherwise,
    return 0.  */
@@ -1249,12 +1249,15 @@ rare_destination (insn)
      rtx insn;
 {
   int jump_count = 0;
+  rtx next;
 
-  for (; insn; insn = NEXT_INSN (insn))
+  for (; insn; insn = next)
     {
       if (GET_CODE (insn) == INSN && GET_CODE (PATTERN (insn)) == SEQUENCE)
 	insn = XVECEXP (PATTERN (insn), 0, 0);
 
+      next = NEXT_INSN (insn);
+
       switch (GET_CODE (insn))
 	{
 	case CODE_LABEL:
@@ -1270,7 +1273,7 @@ rare_destination (insn)
 	    return 1;
 	  else if (simplejump_p (insn)
 		   && jump_count++ < 10)
-	    insn = JUMP_LABEL (insn);
+	    next = JUMP_LABEL (insn);
 	  else
 	    return 0;
 	}