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f346a4c44c
This commit just adds a regress test for a few of the important corner cases that I identified in #27557, which turn out to not be tested anywhere. While here, annotate a few of the existing test cases where we could improve escape analysis. Updates #27557. Change-Id: Ie57792a538f7899bb17915485fabc86100f469a3 Reviewed-on: https://go-review.googlesource.com/c/go/+/197137 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
43 lines
1008 B
Go
43 lines
1008 B
Go
// errorcheck -0 -l -m
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// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package p
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var sink interface{}
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func _() {
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// BAD: t should not escape
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var t T // ERROR "moved to heap"
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f := t.noescape // ERROR "t.noescape does not escape"
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f()
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}
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func _() {
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var t T // ERROR "moved to heap"
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f := t.escape // ERROR "t.escape does not escape"
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f()
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}
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func _() {
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var t T // ERROR "moved to heap"
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f := t.returns // ERROR "t.returns does not escape"
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sink = f()
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}
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type T struct{}
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func (t *T) noescape() {} // ERROR "t does not escape"
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func (t *T) escape() { sink = t } // ERROR "leaking param: t$"
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func (t *T) returns() *T { return t } // ERROR "leaking param: t to result ~r0 level=0"
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func (t *T) recursive() { // ERROR "leaking param: t$"
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sink = t
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var t2 T // ERROR "moved to heap"
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f := t2.recursive // ERROR "t2.recursive does not escape"
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f()
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}
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