added tests as prepared by oliver

test/ref/cc65110211.c

@@ -0,0 +1,80 @@
+/*
+  !!DESCRIPTION!! unreachable code related bug
+  !!ORIGIN!!      Testsuite
+  !!LICENCE!!     Public Domain
+*/
+
+/*
+    test2 and test3 will result in an endless loop (SVN version: 4974M)
+*/
+
+#define OPENTEST()
+#define CLOSETEST()
+
+static char upper[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+int test1(void)
+{
+    int res;
+    unsigned char *p;
+
+    p = upper;
+    res = 0;
+
+    while(*p) {
+        if(*p < 0) {
+            res = 1;
+        }
+        p++;
+    }
+
+    printf("test1:ok\n");
+    return res;
+}
+
+int test2(void)
+{
+    int res;
+    unsigned char *p;
+
+    p = upper;
+    res = 0;
+
+    while(*p) {
+        if(*p++ < 0) {
+            res = 1;
+        }
+    }
+
+    printf("test2:ok\n");
+    return res;
+}
+
+int test3(void)
+{
+    int res;
+    unsigned char *p;
+
+    p = upper;
+    res = 0;
+
+    while(*p) {
+        if(*++p < 0) {
+            res = 1;
+        }
+    }
+
+    printf("test3:ok\n");
+    return res;
+}
+
+int main(int n,char **args)
+{
+    test1();
+    test2();
+    test3();
+
+    printf("it works :)\n");
+
+    return 0;
+}