Source file test/fixedbugs/issue27829.go

     1  // run
     2  
     3  // Copyright 2018 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // Bad AND/BTR combination rule.
     8  
     9  package main
    10  
    11  import "fmt"
    12  
    13  //go:noinline
    14  func f(x uint64) uint64 {
    15  	return (x >> 48) &^ (uint64(0x4000))
    16  }
    17  
    18  func main() {
    19  	bad := false
    20  	if got, want := f(^uint64(0)), uint64(0xbfff); got != want {
    21  		fmt.Printf("got %x, want %x\n", got, want)
    22  		bad = true
    23  	}
    24  	if bad {
    25  		panic("bad")
    26  	}
    27  }
    28  

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