(rare_destination): Ensure we always correctly handle a null

JUMP_LABEL.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@6150 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/reorg.c b/gcc/reorg.c
index 515964c..d62fd2d 100644 (file)
--- 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;
        }