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https://github.com/golang/go
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1a3006b035
Change-Id: If443ffb50b140c466dcf4cc5340f44948bfa46a9 Reviewed-on: https://go-review.googlesource.com/26765 Reviewed-by: Matthew Dempsky <mdempsky@google.com>
83 lines
1 KiB
Go
83 lines
1 KiB
Go
// Copyright 2015 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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func fail() // unimplemented, to test dead code elimination
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// Test dead code elimination in if statements
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func init() {
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if false {
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fail()
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}
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if 0 == 1 {
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fail()
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}
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}
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// Test dead code elimination in ordinary switch statements
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func init() {
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const x = 0
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switch x {
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case 1:
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fail()
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}
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switch 1 {
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case x:
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fail()
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}
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switch {
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case false:
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fail()
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}
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const a = "a"
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switch a {
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case "b":
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fail()
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}
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const snowman = '☃'
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switch snowman {
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case '☀':
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fail()
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}
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const zero = float64(0.0)
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const one = float64(1.0)
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switch one {
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case -1.0:
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fail()
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case zero:
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fail()
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}
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switch 1.0i {
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case 1:
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fail()
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case -1i:
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fail()
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}
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const no = false
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switch no {
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case true:
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fail()
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}
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// Test dead code elimination in large ranges.
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switch 5 {
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case 3, 4, 5, 6, 7:
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case 0, 1, 2:
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fail()
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default:
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fail()
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}
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}
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func main() {
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}
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