added tests as prepared by oliver

test/val/while.c

@@ -0,0 +1,53 @@
+/*
+  !!DESCRIPTION!!
+  !!ORIGIN!!      SDCC regression tests
+  !!LICENCE!!     GPL, read COPYING.GPL
+*/
+
+#include <stdio.h>
+#include <limits.h>
+
+unsigned char success = 0;
+unsigned char failures = 0;
+unsigned char dummy = 0;
+
+#ifdef SUPPORT_BIT_TYPES
+bit bit0 = 0;
+#endif
+unsigned int aint0 = 0;
+unsigned int aint1 = 0;
+unsigned char achar0 = 0;
+unsigned char achar1 = 0;
+
+void
+done ()
+{
+  dummy++;
+}
+
+void
+while1 (void)
+{
+  unsigned char i = 10;
+
+  do
+    {
+      achar0++;
+    }
+  while (--i);
+
+  if (achar0 != 10)
+    failures++;
+}
+
+int
+main (void)
+{
+  while1 ();
+
+  success = failures;
+  done ();
+  printf("failures: %d\n",failures);
+
+  return failures;
+}