cmd/link: treat reflect.Value.Method like Call

Fixes #14740

Change-Id: Iad8d971c21977b0a1f4ef55a08bb180a8125e976
Reviewed-on: https://go-review.googlesource.com/20562
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/test/reflectmethod4.go b/test/reflectmethod4.go
new file mode 100644
index 0000000000..037b3dada3
--- /dev/null
+++ b/test/reflectmethod4.go
@@ -0,0 +1,30 @@
+// run
+
+// Copyright 2016 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.
+
+// The linker can prune methods that are not directly called or
+// assigned to interfaces, but only if reflect.Value.Method is
+// never used. Test it here.
+
+package main
+
+import "reflect"
+
+var called = false
+
+type M int
+
+func (m M) UniqueMethodName() {
+	called = true
+}
+
+var v M
+
+func main() {
+	reflect.ValueOf(v).Method(0).Interface().(func())()
+	if !called {
+		panic("UniqueMethodName not called")
+	}
+}