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test: Use global variables to defeat gccgo optimizer.

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The gccgo compiler is smart enough to not make something which
is not used.  Use global variables to defeat this
optimization.

R=rsc
CC=golang-dev
https://golang.org/cl/2129041
This commit is contained in:
Ian Lance Taylor 2010-09-01 13:40:20 -07:00
parent 728003e340
commit 426275d702
1 changed files with 17 additions and 11 deletions
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28
test/fixedbugs/bug273.go
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@ -15,6 +15,8 @@ var bug = false
var minus1 = -1
var big int64 = 10 | 1<<32
var g1 []int
func shouldfail(f func(), desc string) {
defer func() { recover() }()
f()
@ -26,52 +28,56 @@ func shouldfail(f func(), desc string) {
}
func badlen() {
_ = make([]int, minus1)
g1 = make([]int, minus1)
}
func biglen() {
_ = make([]int, big)
g1 = make([]int, big)
}
func badcap() {
_ = make([]int, 10, minus1)
g1 = make([]int, 10, minus1)
}
func badcap1() {
_ = make([]int, 10, 5)
g1 = make([]int, 10, 5)
}
func bigcap() {
_ = make([]int, 10, big)
g1 = make([]int, 10, big)
}
const (
addrBits = 8*uint(unsafe.Sizeof((*byte)(nil)))
sh = addrBits/2 - 2
)
var g2 [][1<<sh][1<<sh]byte
func overflow() {
_ = make([][1<<sh][1<<sh]byte, 64)
g2 = make([][1<<sh][1<<sh]byte, 64)
}
var g3 map[int]int
func badmapcap() {
_ = make(map[int]int, minus1)
g3 = make(map[int]int, minus1)
}
func bigmapcap() {
_ = make(map[int]int, big)
g3 = make(map[int]int, big)
}
var g4 chan int
func badchancap() {
_ = make(chan int, minus1)
g4 = make(chan int, minus1)
}
func bigchancap() {
_ = make(chan int, big)
g4 = make(chan int, big)
}
var g5 chan [1<<15]byte
func overflowchan() {
if addrBits == 32 {
_ = make(chan [1<<15]byte, 1<<20)
g5 = make(chan [1<<15]byte, 1<<20)
} else {
// cannot overflow on 64-bit, because
// int is 32 bits and max chan value size