You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35 lines
588 B
35 lines
588 B
// 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.
|
|
|
|
package main
|
|
|
|
// Make sure the compiler knows that DUFFCOPY clobbers X0
|
|
|
|
import "fmt"
|
|
|
|
//go:noinline
|
|
func f(x float64) float64 {
|
|
// y is allocated to X0
|
|
y := x + 5
|
|
// marshals z before y. Marshaling z
|
|
// calls DUFFCOPY.
|
|
return g(z, y)
|
|
}
|
|
|
|
//go:noinline
|
|
func g(b [64]byte, y float64) float64 {
|
|
return y
|
|
}
|
|
|
|
var z [64]byte
|
|
|
|
func main() {
|
|
got := f(5)
|
|
if got != 10 {
|
|
panic(fmt.Sprintf("want 10, got %f", got))
|
|
}
|
|
}
|