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go/test/typeparam/devirtualize2.go
Keith Randall bd3f44e4ff cmd/compile: constant-fold loads from constant dictionaries and types
Retrying the original CL with a small modification. The original CL
did not handle the case of reading an itab out of a dictionary
correctly.  When we read an itab out of a dictionary, we must treat
the type inside that itab as maybe being put in an interface.

Original CL: 486895
Revert CL: 490156

Change-Id: Id2dc1699d184cd8c63dac83986a70b60b4e6cbd7
Reviewed-on: https://go-review.googlesource.com/c/go/+/491495
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-05-19 18:10:11 +00:00

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363 B
Go

// 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()
}