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a.go
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b.go
(497 B)
Editing: a.go
// Copyright 2020 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 a type I interface{ M() } type T int func (T) M() {} // ERROR "can inline T.M" func E() I { // ERROR "can inline E" return T(0) // ERROR "T\(0\) escapes to heap" } func F(i I) I { // ERROR "can inline F" "leaking param: i to result ~r0 level=0" i = nil return i } func g() { h := E() // ERROR "inlining call to E" "T\(0\) does not escape" h.M() // ERROR "devirtualizing h.M to T" // BAD: T(0) could be stack allocated. i := F(T(0)) // ERROR "inlining call to F" "T\(0\) escapes to heap" // Testing that we do NOT devirtualize here: i.M() }
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