reflect: Fix calling Interface method on value created by MakeFunc.

From-SVN: r203212

libgo/go/reflect/all_test.go

@@ -1454,6 +1454,30 @@ func TestMakeFunc(t *testing.T) {
 	}
 }
 
+func TestMakeFuncInterface(t *testing.T) {
+	switch runtime.GOARCH {
+	case "amd64", "386":
+	default:
+		t.Skip("MakeFunc not implemented for " + runtime.GOARCH)
+	}
+
+	fn := func(i int) int { return i }
+	incr := func(in []Value) []Value {
+		return []Value{ValueOf(int(in[0].Int() + 1))}
+	}
+	fv := MakeFunc(TypeOf(fn), incr)
+	ValueOf(&fn).Elem().Set(fv)
+	if r := fn(2); r != 3 {
+		t.Errorf("Call returned %d, want 3", r)
+	}
+	if r := fv.Call([]Value{ValueOf(14)})[0].Int(); r != 15 {
+		t.Errorf("Call returned %d, want 15", r)
+	}
+	if r := fv.Interface().(func(int) int)(26); r != 27 {
+		t.Errorf("Call returned %d, want 27", r)
+	}
+}
+
 type Point struct {
 	x, y int
 }

libgo/go/reflect/makefunc.go

@@ -63,7 +63,7 @@ func MakeFunc(typ Type, fn func(args []Value) (results []Value)) Value {
 
 	impl := &makeFuncImpl{code: code, typ: ftyp, fn: fn}
 
-	return Value{t, unsafe.Pointer(impl), flag(Func) << flagKindShift}
+	return Value{t, unsafe.Pointer(&impl), flag(Func<<flagKindShift) | flagIndir}
 }
 
 // makeFuncStub is an assembly function that is the code half of