mirror of
https://github.com/golang/go
synced 2024-11-05 18:36:08 +00:00
6c6089b3fd
Removes 49 more bound checks in make.bash. For example:
var a[100]int
for i := 0; i < 50; i++ {
use a[i+25]
}
Change-Id: I85e0130ee5d07f0ece9b17044bba1a2047414ce7
Reviewed-on: https://go-review.googlesource.com/21379
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro>
TryBot-Result: Gobot Gobot <gobot@golang.org>
114 lines
2.1 KiB
Go
114 lines
2.1 KiB
Go
// +build amd64
|
|
// errorcheck -0 -d=ssa/check_bce/debug=3
|
|
|
|
package main
|
|
|
|
func f0(a []int) {
|
|
a[0] = 1 // ERROR "Found IsInBounds$"
|
|
a[0] = 1
|
|
a[6] = 1 // ERROR "Found IsInBounds$"
|
|
a[6] = 1
|
|
a[5] = 1
|
|
a[5] = 1
|
|
}
|
|
|
|
func f1(a [256]int, i int) {
|
|
useInt(a[i]) // ERROR "Found IsInBounds$"
|
|
useInt(a[i%256]) // ERROR "Found IsInBounds$"
|
|
useInt(a[i&255])
|
|
useInt(a[i&17])
|
|
|
|
if 4 <= i && i < len(a) {
|
|
useInt(a[i])
|
|
useInt(a[i-1]) // ERROR "Found IsInBounds$"
|
|
useInt(a[i-4]) // ERROR "Found IsInBounds$"
|
|
}
|
|
}
|
|
|
|
func f2(a [256]int, i uint) {
|
|
useInt(a[i]) // ERROR "Found IsInBounds$"
|
|
useInt(a[i%256])
|
|
useInt(a[i&255])
|
|
useInt(a[i&17])
|
|
}
|
|
|
|
func f3(a [256]int, i uint8) {
|
|
useInt(a[i])
|
|
useInt(a[i+10])
|
|
useInt(a[i+14])
|
|
}
|
|
|
|
func f4(a [27]int, i uint8) {
|
|
useInt(a[i%15])
|
|
useInt(a[i%19])
|
|
useInt(a[i%27])
|
|
}
|
|
|
|
func f5(a []int) {
|
|
if len(a) > 5 {
|
|
useInt(a[5])
|
|
useSlice(a[6:])
|
|
useSlice(a[:6]) // ERROR "Found IsSliceInBounds$"
|
|
}
|
|
}
|
|
|
|
func f6(a [32]int, b [64]int, i int) {
|
|
useInt(a[uint32(i*0x07C4ACDD)>>27])
|
|
useInt(b[uint64(i*0x07C4ACDD)>>58])
|
|
useInt(a[uint(i*0x07C4ACDD)>>59])
|
|
|
|
// The following bounds should not be removed because they can overflow.
|
|
useInt(a[uint32(i*0x106297f105d0cc86)>>26]) // ERROR "Found IsInBounds$"
|
|
useInt(b[uint64(i*0x106297f105d0cc86)>>57]) // ERROR "Found IsInBounds$"
|
|
useInt(a[int32(i*0x106297f105d0cc86)>>26]) // ERROR "Found IsInBounds$"
|
|
useInt(b[int64(i*0x106297f105d0cc86)>>57]) // ERROR "Found IsInBounds$"
|
|
}
|
|
|
|
func g1(a []int) {
|
|
for i := range a {
|
|
a[i] = i
|
|
useSlice(a[:i+1])
|
|
useSlice(a[:i])
|
|
}
|
|
}
|
|
|
|
func g2(a []int) {
|
|
useInt(a[3]) // ERROR "Found IsInBounds$"
|
|
useInt(a[2])
|
|
useInt(a[1])
|
|
useInt(a[0])
|
|
}
|
|
|
|
func g3(a []int) {
|
|
for i := range a[:256] { // ERROR "Found IsSliceInBounds$"
|
|
useInt(a[i]) // ERROR "Found IsInBounds$"
|
|
}
|
|
b := a[:256]
|
|
for i := range b {
|
|
useInt(b[i])
|
|
}
|
|
}
|
|
|
|
func g4(a [100]int) {
|
|
for i := 10; i < 50; i++ {
|
|
useInt(a[i-10])
|
|
useInt(a[i])
|
|
useInt(a[i+25])
|
|
useInt(a[i+50])
|
|
|
|
// The following are out of bounds.
|
|
useInt(a[i-11]) // ERROR "Found IsInBounds$"
|
|
useInt(a[i+51]) // ERROR "Found IsInBounds$"
|
|
}
|
|
}
|
|
|
|
//go:noinline
|
|
func useInt(a int) {
|
|
}
|
|
|
|
//go:noinline
|
|
func useSlice(a []int) {
|
|
}
|
|
|
|
func main() {
|
|
}
|