added tests as prepared by oliver

test/val/ptrfunc.c

@@ -0,0 +1,136 @@
+/*
+  !!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 uint0 = 0;
+unsigned int uint1 = 0;
+
+/*
+ * BUG: if these aren't volatile, an overzealous optimizer or somthing
+ * wreaks havoc with the simple tests like "if(uchar != 3)failures++"
+ */
+
+#if 0
+unsigned char uchar0 = 0;
+unsigned char uchar1 = 0;
+unsigned char uchar2 = 0;
+#else
+volatile unsigned char uchar0 = 0;
+volatile unsigned char uchar1 = 0;
+volatile unsigned char uchar2 = 0;
+#endif
+
+#ifdef NO_IMPLICIT_FUNCPTR_CONV
+void (*pfunc)(void);
+void (*p1func)(void);
+unsigned char (*pcfunc)(void);
+#else
+void (*pfunc)();
+void (*p1func)();
+unsigned char (*pcfunc)();
+#endif
+
+void done()
+{
+  dummy++;
+}
+
+void call0(void)
+{
+	uchar0++;
+}
+
+void call1(void)
+{
+	uchar1++;
+}
+
+unsigned char call2(void)
+{
+	return uchar0 + 9;
+}
+
+void docall0(void)
+{
+	pfunc = call0;
+	(pfunc)();
+	if(uchar0 != 1)
+		failures++;
+}
+
+void docall1()
+{
+	unsigned char i;
+	for(i = 0; i < 3; i++) {
+		(*p1func)();
+	}
+}
+
+#ifdef NO_IMPLICIT_FUNCPTR_CONV
+void docall2( void(*pf)(void) )
+#else
+void docall2( void(*pf)() )
+#endif
+{
+	unsigned char i;
+	for(i = 0; i < 2; i++) {
+		pf();
+	}
+}
+
+int  main(void)
+{
+    docall0();
+
+	p1func = call1;
+	docall1();
+	if(uchar1 != 3)
+		failures++;
+	if(uchar0 != 1)
+		failures++;
+
+	p1func = call0;
+	docall1();
+	if(uchar1 != 3)
+		failures++;
+	if(uchar0 != 4)
+		failures++;
+
+	docall2(call0);
+	if(uchar1 != 3)
+		failures++;
+	if(uchar0 != 6)
+		failures++;
+
+	docall2(call1);
+	if(uchar1 != 5)
+		failures++;
+	if(uchar0 != 6)
+		failures++;
+
+ 	pcfunc = call2;
+ 	uchar2 = (*pcfunc)();
+	if(uchar2 != 15)
+		failures++;
+
+ 	uchar2 += (pcfunc)();
+	uchar2 += pcfunc();
+
+	success = failures;
+	done();
+	printf("failures: %d\n",failures);
+
+	return failures;
+}