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go/test/align.go

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// run
// Copyright 2018 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
// On 32-bit archs, one of the f fields of a [2]T
// will be unaligned (address of 4 mod 8).
// Make sure we can access the f fields successfully,
// particularly for load-add combo instructions
// introduced by CL 102036.
type T struct {
pad uint32
f float64
}
//go:noinline
func f(t, u *T) float64 {
return 3.0 + t.f + u.f
}
func main() {
t := [2]T{{0, 1.0}, {0, 2.0}}
sink = f(&t[0], &t[1])
}
var sink float64