mirror of
https://github.com/golang/go
synced 2024-11-25 15:37:56 -07:00
3b96eebcbd
Handles a lot more cases where constant ranges can eliminate various (mostly bounds failure) paths. Fixes #66826 Fixes #66692 Fixes #48213 Update #57959 TODO: remove constant logic from poset code, no longer needed. Change-Id: Id196436fcd8a0c84c7d59c04f93bd92e26a0fd7e Reviewed-on: https://go-review.googlesource.com/c/go/+/599096 Reviewed-by: David Chase <drchase@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
34 lines
654 B
Go
34 lines
654 B
Go
// errorcheck -0 -d=ssa/prove/debug=2
|
|
|
|
//go:build amd64
|
|
|
|
// Copyright 2022 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.
|
|
|
|
package main
|
|
|
|
func f0i(x int) int {
|
|
if x == 20 {
|
|
return x // ERROR "Proved.+is constant 20$"
|
|
}
|
|
|
|
if (x + 20) == 20 {
|
|
return x + 5 // ERROR "Proved.+is constant 0$" "Proved.+is constant 5$"
|
|
}
|
|
|
|
return x / 2
|
|
}
|
|
|
|
func f0u(x uint) uint {
|
|
if x == 20 {
|
|
return x // ERROR "Proved.+is constant 20$"
|
|
}
|
|
|
|
if (x + 20) == 20 {
|
|
return x + 5 // ERROR "Proved.+is constant 0$" "Proved.+is constant 5$"
|
|
}
|
|
|
|
return x / 2
|
|
}
|