added tests as prepared by oliver

test/val/add4.c

@@ -0,0 +1,94 @@
+/*
+  !!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
+int int0 = 0;
+int int1 = 0;
+char char0 = 0;
+char char1 = 0;
+long long0 = 0;
+long long1 = 0;
+unsigned long ulong0 = 0;
+unsigned long ulong1 = 0;
+#define NULL 0
+char *cP0=NULL;
+char *cP1=NULL;
+int *iP0=NULL;
+int *iP1=NULL;
+
+void
+done ()
+{
+  dummy++;
+}
+
+/* pointer to char arithmetic */
+
+void pc_add(void)
+{
+  if(*cP1)
+    failures++;
+
+  *cP1 += 1;
+  if(*cP1 != 1)
+    failures++;
+
+  if(char0 != 1)
+    failures++;
+
+  char0++;
+
+  if(*cP1 != 2)
+    failures++;
+
+  char1 = char0 + *cP1;
+
+  if(char1 != 4)
+    failures++;
+}
+
+/* pointer to integer arithmetic */
+void pi_add(void)
+{
+  if(*iP0)
+    failures++;
+
+  *iP0 += 1;
+
+  if(*iP0 != 1)
+    failures++;
+
+  if(int0 != 1)
+    failures++;
+
+  int1 = int0 + *iP0;
+  if(int1 != 2)
+    failures++;
+}
+
+int main(void)
+{
+  cP1 = &char0;
+  pc_add();
+
+  iP0 = &int0;
+  pi_add();
+
+  success = failures;
+  done();
+  printf("failures: %d\n",failures);
+
+  return failures;
+}