mirror of
https://github.com/golang/go
synced 2024-11-15 11:10:22 -07:00
39 lines
890 B
Go
39 lines
890 B
Go
|
// run
|
||
|
|
|
||
|
|
// 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
|
||
|
|
|
||
|
|
// This checks for incorrect application of CMP(-x,y) -> CMN(x,y) in arm and arm64
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
func f(p int64, x, y int64) bool { return -x <= p && p <= y }
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
func g(p int32, x, y int32) bool { return -x <= p && p <= y }
|
||
|
|
|
||
|
|
// There are some more complicated patterns involving compares and shifts, try to trigger those.
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
func h(p int64, x, y int64) bool { return -(x<<1) <= p && p <= y }
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
func k(p int32, x, y int32) bool { return -(1<<x) <= p && p <= y }
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
func check(b bool) {
|
||
|
|
if b {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
panic("FAILURE")
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
check(f(1, -1<<63, 1<<63-1))
|
||
|
|
check(g(1, -1<<31, 1<<31-1))
|
||
|
|
check(h(1, -1<<62, 1<<63-1))
|
||
|
|
check(k(1, 31, 1<<31-1))
|
||
|
|
}
|