go issue39459 源码
golang issue39459 代码
文件路径：/test/fixedbugs/issue39459.go
// compile
// 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 p
type T struct { // big enough to be an unSSAable type
a, b, c, d, e, f int
}
func f(x interface{}, p *int) {
_ = *p // trigger nil check here, removing it from below
switch x := x.(type) {
case *T:
// Zero twice, so one of them will be removed by the deadstore pass
*x = T{}
*p = 0 // store op to prevent Zero ops from being optimized by the earlier opt pass rewrite rules
*x = T{}
}
}
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