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Source file test/fixedbugs/issue12133.go

Documentation: test/fixedbugs

  // run
  
  // Copyright 2015 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.
  
  // Issue 12133.  The CX register was getting clobbered
  // because we did not keep track of its allocation correctly.
  
  package main
  
  import "fmt"
  
  func main() {
  	want := uint(48)
  	got := f1(48)
  	if got != want {
  		fmt.Println("got", got, ", wanted", want)
  		panic("bad")
  	}
  }
  
  //go:noinline
  func f1(v1 uint) uint {
  	return v1 >> ((1 >> v1) + (1 >> v1))
  }
  

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