| // run | |
| // Copyright 2021 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 | |
| import "fmt" | |
| //go:noinline | |
| func repro(b []byte, bit int32) { | |
| _ = b[3] | |
| v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 | 1<<(bit&31) | |
| b[0] = byte(v) | |
| b[1] = byte(v >> 8) | |
| b[2] = byte(v >> 16) | |
| b[3] = byte(v >> 24) | |
| } | |
| func main() { | |
| var b [8]byte | |
| repro(b[:], 32) | |
| want := [8]byte{1, 0, 0, 0, 0, 0, 0, 0} | |
| if b != want { | |
| panic(fmt.Sprintf("got %v, want %v\n", b, want)) | |
| } | |
| } |