mirror of
https://github.com/golang/go
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29 lines
586 B
Go
29 lines
586 B
Go
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// run
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// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import "fmt"
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//go:noinline
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func repro(b []byte, bit int32) {
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_ = b[3]
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v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 | 1<<(bit&31)
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b[0] = byte(v)
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b[1] = byte(v >> 8)
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b[2] = byte(v >> 16)
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b[3] = byte(v >> 24)
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}
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func main() {
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var b [8]byte
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repro(b[:], 32)
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want := [8]byte{1, 0, 0, 0, 0, 0, 0, 0}
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if b != want {
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panic(fmt.Sprintf("got %v, want %v\n", b, want))
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}
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}
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