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https://github.com/golang/go
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1747788c56
Since BCE happens over several passes (opt, loopbce, prove) it's easy to regress especially with rewriting. The pass is only activated with special debug flag. Change-Id: I46205982e7a2751156db8e875d69af6138068f59 Reviewed-on: https://go-review.googlesource.com/21510 Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com>
90 lines
1.4 KiB
Go
90 lines
1.4 KiB
Go
// +build amd64
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// errorcheck -0 -d=ssa/check_bce/debug=3
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package main
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func f0(a []int) {
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a[0] = 1 // ERROR "Found IsInBounds$"
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a[0] = 1
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a[6] = 1 // ERROR "Found IsInBounds$"
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a[6] = 1
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a[5] = 1
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a[5] = 1
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}
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func f1(a [256]int, i int) {
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useInt(a[i]) // ERROR "Found IsInBounds$"
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useInt(a[i%256]) // ERROR "Found IsInBounds$"
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useInt(a[i&255])
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useInt(a[i&17])
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if 4 <= i && i < len(a) {
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useInt(a[i])
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useInt(a[i-1]) // ERROR "Found IsInBounds$"
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useInt(a[i-4]) // ERROR "Found IsInBounds$"
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}
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}
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func f2(a [256]int, i uint) {
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useInt(a[i]) // ERROR "Found IsInBounds$"
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useInt(a[i%256])
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useInt(a[i&255])
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useInt(a[i&17])
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}
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func f3(a [256]int, i uint8) {
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useInt(a[i])
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useInt(a[i+10])
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useInt(a[i+14])
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}
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func f4(a [27]int, i uint8) {
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useInt(a[i%15])
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useInt(a[i%19])
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useInt(a[i%27])
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}
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func f5(a []int) {
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if len(a) > 5 {
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useInt(a[5])
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useSlice(a[6:])
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useSlice(a[:6]) // ERROR "Found IsSliceInBounds$"
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}
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}
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func g1(a []int) {
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for i := range a {
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a[i] = i
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useSlice(a[:i+1])
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useSlice(a[:i])
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}
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}
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func g2(a []int) {
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useInt(a[3]) // ERROR "Found IsInBounds$"
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useInt(a[2])
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useInt(a[1])
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useInt(a[0])
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}
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func g3(a []int) {
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for i := range a[:256] { // ERROR "Found IsSliceInBounds$"
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useInt(a[i]) // ERROR "Found IsInBounds$"
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}
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b := a[:256]
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for i := range b {
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useInt(b[i])
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}
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}
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//go:noinline
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func useInt(a int) {
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}
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//go:noinline
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func useSlice(a []int) {
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}
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func main() {
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}
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