File: issue18906.go

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// run

// Copyright 2017 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

//go:noinline
func f(x int) {
}

//go:noinline
func val() int8 {
	return -1
}

var (
	array = [257]int{}
	slice = array[1:]
)

func init() {
	for i := range array {
		array[i] = i - 1
	}
}

func main() {
	x := val()
	y := int(uint8(x))
	f(y) // try and force y to be calculated and spilled
	if slice[y] != 255 {
		panic("incorrect value")
	}
}