mirror of
https://github.com/golang/go
synced 2024-11-08 18:46:16 -07:00
0153a4130d
KeepAlive needs to introduce a use of the spill of the value it is keeping alive. Without that, we don't guarantee that the spill dominates the KeepAlive. This bug was probably introduced with the code to move spills down to the dominator of the restores, instead of always spilling just after the value itself (CL 34822). Fixes #22458. Change-Id: I94955a21960448ffdacc4df775fe1213967b1d4c Reviewed-on: https://go-review.googlesource.com/74210 Reviewed-by: Cherry Zhang <cherryyz@google.com> Reviewed-by: David Chase <drchase@google.com>
27 lines
456 B
Go
27 lines
456 B
Go
// compile
|
|
|
|
// Copyright 2017 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.
|
|
|
|
// Make sure KeepAlive introduces a use of the spilled variable.
|
|
|
|
package main
|
|
|
|
import "runtime"
|
|
|
|
type node struct {
|
|
next *node
|
|
}
|
|
|
|
var x bool
|
|
|
|
func main() {
|
|
var head *node
|
|
for x {
|
|
head = &node{head}
|
|
}
|
|
|
|
runtime.KeepAlive(head)
|
|
}
|