Source file test/fixedbugs/issue12411.go

     1  // run
     2  
     3  //go:build !386
     4  
     5  // Copyright 2015 The Go Authors. All rights reserved.
     6  // Use of this source code is governed by a BSD-style
     7  // license that can be found in the LICENSE file.
     8  
     9  // Issue 12411. Loss of AX during %.
    10  
    11  package main
    12  
    13  func main() {
    14  	x := f(4)
    15  	if x != 0 {
    16  		println("BUG: x=", x)
    17  	}
    18  }
    19  
    20  //go:noinline
    21  func f(x int) int {
    22  	// AX was live on entry to one of the % code generations,
    23  	// and the % code generation smashed it.
    24  	return ((2 * x) % 3) % (2 % ((x << 2) ^ (x % 3)))
    25  }
    26  

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