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go/test/fixedbugs/issue4348.go
Rémy Oudompheng 1e233ad075 cmd/6g: fix use of large integers as indexes or array sizes.
A check for smallintconst was missing before generating the
comparisons.

Fixes #4348.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6815088
2012-11-06 22:53:57 +01:00

29 lines
529 B
Go

// compile
// Copyright 2012 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.
// Issue 4238. After switch to 64-bit ints the compiler generates
// illegal instructions when using large array bounds or indexes.
package main
// 1<<32 on a 64-bit machine, 1 otherwise.
const LARGE = ^uint(0)>>32 + 1
func A() int {
var a []int
return a[LARGE]
}
func B(i int) int {
var b [LARGE]int
return b[i]
}
func main() {
n := A()
B(n)
}