| // 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)) |
| } |
