golang issue38746 代码
文件路径：/test/fixedbugs/issue38746.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 main
var g *uint64
func main() {
var v uint64
g = &v
v &^= (1 << 31)
v |= 1 << 63
v &^= (1 << 63)
}