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https://github.com/golang/go
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2acd3646fc
Induction variable detection is still not quite right. I've added another failing test. Redo the overflow/underflow detector so it is more obviously correct. Update #53600 Fixes #53653 Fixes #53663 Change-Id: Id95228e282fdbf6bd80b26e1c41d62e935ba08ff Reviewed-on: https://go-review.googlesource.com/c/go/+/415874 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> Reviewed-by: David Chase <drchase@google.com>
54 lines
802 B
Go
54 lines
802 B
Go
// run
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// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import "math"
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func main() {
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f()
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g()
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h()
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j(math.MinInt64)
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}
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func f() {
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for i := int64(math.MaxInt64); i <= math.MaxInt64; i++ {
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if i < 0 {
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println("done")
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return
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}
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println(i, i < 0)
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}
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}
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func g() {
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for i := int64(math.MaxInt64) - 1; i <= math.MaxInt64; i++ {
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if i < 0 {
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println("done")
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return
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}
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println(i, i < 0)
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}
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}
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func h() {
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for i := int64(math.MaxInt64) - 2; i <= math.MaxInt64; i += 2 {
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if i < 0 {
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println("done")
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return
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}
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println(i, i < 0)
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}
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}
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//go:noinline
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func j(i int64) {
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for j := int64(math.MaxInt64); j <= i-1; j++ {
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if j < 0 {
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break
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}
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println(j)
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}
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}
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