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Source file test/fixedbugs/issue11987.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 11987. The ppc64 SRADCC instruction was misassembled in a way
  // lost bit 5 of the immediate so v>>32 was assembled as v>>0.  SRADCC
  // is only ever inserted by peep so it's hard to be sure when it will
  // be used. This formulation worked when the bug was fixed.
  
  package main
  
  import "fmt"
  
  var v int64 = 0x80000000
  
  func main() {
  	s := fmt.Sprintf("%v", v>>32 == 0)
  	if s != "true" {
  		fmt.Printf("BUG: v>>32 == 0 evaluated as %q\n", s)
  	}
  }
  

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