(do_jump_for_compare): Don't blow up if aren't any insns in this

sequence yet.

From-SVN: r5789

diff --git a/gcc/expr.c b/gcc/expr.c
index 5353fbaddab2c3787e91c807a699c7f33dccd7aa..59ee991a5a68ad1300c0a825566bf65c57eb2578 100644 (file)
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -8615,9 +8615,12 @@ do_jump_for_compare (comparison, if_false_label, if_true_label)
   else if (if_false_label)
     {
       rtx insn;
-      rtx prev = PREV_INSN (get_last_insn ());
+      rtx prev = get_last_insn ();
       rtx branch = 0;
 
+      if (prev != 0)
+       prev = PREV_INSN (prev);
+
       /* Output the branch with the opposite condition.  Then try to invert
         what is generated.  If more than one insn is a branch, or if the
         branch is not the last insn written, abort. If we can't invert