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Source file test/fixedbugs/issue16985.go

Documentation: test/fixedbugs

     1  // run
     2  
     3  // Copyright 2016 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  // issue 16985: intrinsified AMD64 atomic ops should clobber flags
     8  
     9  package main
    10  
    11  import "sync/atomic"
    12  
    13  var count uint32
    14  
    15  func main() {
    16  	buffer := []byte("T")
    17  	for i := 0; i < len(buffer); {
    18  		atomic.AddUint32(&count, 1)
    19  		_ = buffer[i]
    20  		i++
    21  		i++
    22  	}
    23  
    24  	for i := 0; i < len(buffer); {
    25  		atomic.CompareAndSwapUint32(&count, 0, 1)
    26  		_ = buffer[i]
    27  		i++
    28  		i++
    29  	}
    30  
    31  	for i := 0; i < len(buffer); {
    32  		atomic.SwapUint32(&count, 1)
    33  		_ = buffer[i]
    34  		i++
    35  		i++
    36  	}
    37  }
    38  

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