| // 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)) |
| } |
| } |
