test/fixedbugs: forgotten test cases for issues 3907 and 4156.
Update #3907.
Update #4156.
R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/6595044
diff --git a/test/fixedbugs/bug455.go b/test/fixedbugs/bug455.go
new file mode 100644
index 0000000..8e3c770
--- /dev/null
+++ b/test/fixedbugs/bug455.go
@@ -0,0 +1,54 @@
+// run
+
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Issue 4156: out of fixed registers when chaining method calls.
+// Used to happen with 6g.
+
+package main
+
+type test_i interface {
+ Test() test_i
+ Result() bool
+}
+
+type test_t struct {
+}
+
+func newTest() *test_t {
+ return &test_t{}
+}
+
+type testFn func(string) testFn
+
+func main() {
+ test := newTest()
+
+ switch {
+ case test.
+ Test().
+ Test().
+ Test().
+ Test().
+ Test().
+ Test().
+ Test().
+ Test().
+ Test().
+ Test().
+ Result():
+ // case worked
+ default:
+ panic("Result returned false unexpectedly")
+ }
+}
+
+func (t *test_t) Test() test_i {
+ return t
+}
+
+func (t *test_t) Result() bool {
+ return true
+}
