Initial commit: Go 1.23 release state

test/typeparam/devirtualize2.go

@@ -0,0 +1,28 @@
+// run
+
+// Copyright 2023 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.
+
+package main
+
+type S struct {
+	x int
+}
+
+func (t *S) M1() {
+}
+func (t *S) M2() {
+}
+
+type I interface {
+	M1()
+}
+
+func F[T I](x T) I {
+	return x
+}
+
+func main() {
+	F(&S{}).(interface{ M2() }).M2()
+}