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Source file test/fixedbugs/issue12411.go

Documentation: test/fixedbugs

  // +build !386
  // 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 12411. Loss of AX during %.
  
  package main
  
  func main() {
  	x := f(4)
  	if x != 0 {
  		println("BUG: x=", x)
  	}
  }
  
  //go:noinline
  func f(x int) int {
  	// AX was live on entry to one of the % code generations,
  	// and the % code generation smashed it.
  	return ((2 * x) % 3) % (2 % ((x << 2) ^ (x % 3)))
  }
  

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