文件操作 - issue50854.go
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文件: /usr/share/go-1.23/test/fixedbugs/issue50854.go
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// 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)) }
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