added tests as prepared by oliver

test/ref/cc65090913.c

@@ -0,0 +1,31 @@
+/*
+  !!DESCRIPTION!! optimizer bug
+  !!ORIGIN!!      testsuite
+  !!LICENCE!!     Public Domain
+  !!AUTHOR!!      Oliver Schmidt
+*/
+
+/*
+> I found the problem and fixed it. cc65 treated a label as a statement, but
+> the standard says, that a label is part of a statement. In a loop without
+> curly braces like
+>
+>         while (foo < bar)
+>             label:  ++foo;
+>
+> the following statement is the one that is looped over - and because cc65
+> treated just the label as a statement, it created code that looped forever.
+
+*/
+
+int foo=0,bar=2;
+
+int main(void)
+{
+    while(foo<bar)
+	    label: ++foo;
+
+    printf("foo: %d bar: %d\n",foo,bar);
+
+    return 0;
+}