[qfcc] Add a failing test case for if-super calls

The common idiom for self init (below) causes a double-call when
compiling with --advanced, resulting in an incorrect retain count.

    if (!(self = [super init])) {
	return nil;
    }

tools/qfcc/test/Makemodule.am

@@ -29,6 +29,7 @@ test_progs_dat=\
 	tools/qfcc/test/func-expr2.dat \
 	tools/qfcc/test/func-static.dat \
 	tools/qfcc/test/gcd.dat \
+	tools/qfcc/test/ifsuper.dat \
 	tools/qfcc/test/infloop.dat \
 	tools/qfcc/test/iterfunc.dat \
 	tools/qfcc/test/ivar-struct-return.dat \
@@ -369,6 +370,16 @@ tools/qfcc/test/gcd.run: $(qfcc_test_run_deps)
 include $(gcd_dep) # am--include-marker
 pas_depfiles_remade += $(gcd_dep)
 
+tools_qfcc_test_ifsuper_dat_SOURCES=tools/qfcc/test/ifsuper.r
+ifsuper_obj=$(tools_qfcc_test_ifsuper_dat_SOURCES:.r=.o)
+ifsuper_dep=$(call qcautodep,$(tools_qfcc_test_ifsuper_dat_SOURCES))
+tools/qfcc/test/ifsuper.dat$(EXEEXT): $(ifsuper_obj) $(QFCC_DEP)
+	$(V_QFCCLD)$(QLINK) --advanced -o $@ $(ifsuper_obj)
+tools/qfcc/test/ifsuper.run: $(qfcc_test_run_deps)
+	@$(top_srcdir)/tools/qfcc/test/build-run $@
+include $(ifsuper_dep) # am--include-marker
+r_depfiles_remade += $(ifsuper_dep)
+
 tools_qfcc_test_infloop_dat_SOURCES=tools/qfcc/test/infloop.r
 infloop_obj=$(tools_qfcc_test_infloop_dat_SOURCES:.r=.o)
 infloop_dep=$(call qcautodep,$(tools_qfcc_test_infloop_dat_SOURCES))

tools/qfcc/test/ifsuper.r

@@ -0,0 +1,56 @@
+#pragma advanced
+#include "test-harness.h"
+
+int obj_increment_retaincount (id object) = #0;
+int obj_get_retaincount (id object) = #0;
+id (Class class) class_create_instance = #0;
+id obj_msgSend_super (Super *class, SEL op, ...) = #0;
+
+@interface Object
+{
+	Class       isa;
+}
++(id) alloc;
+-(id) init;
+@end
+
+@interface Foo : Object
+-(id) init;
+@end
+
+@implementation Object
++(id) alloc
+{
+	return class_create_instance (self);
+}
+-(id) init
+{
+	obj_increment_retaincount (self);
+	return self;
+}
+@end
+
+@implementation Foo
+-(id) init
+{
+	if (!(self = [super init])) {
+		return nil;
+	}
+	return self;
+}
+@end
+
+int main ()
+{
+	Foo        *foo = [[Foo alloc] init];
+	if (!foo) {
+		printf ("foo is nil\n");
+		return 1;
+	}
+	int         retain = obj_get_retaincount (foo);
+	if (retain != 1) {
+		printf ("retain count != 1: %d\n", retain);
+		return 1;
+	}
+	return 0;
+}

tools/qfcc/test/test-harness.h

@@ -3,6 +3,8 @@ void printf (string fmt, ...) = #0;
 int errno (void) = #0;
 string strerror (int err) = #0;
 void exit (int code) = #0;
+void traceon (void) = #0;
+void traceoff (void) = #0;
 entity spawn (void) = #0;
 void remove (entity e) = #0;
 id obj_msgSend (id receiver, SEL op, ...) = #0;