[go-nuts] Is the case 2 equivalent to case 1 or case 3 in this example?

[T L]

package main

import (
    "unsafe"
)

func alignment(p *int64) uintptr {
    return unsafe.Alignof(*p)
    // compiler doesn't know if *p is a field or a variable.
    // so compiler will treat *p as a variable, I think.
}

type T struct {
    x int64
}

func main() {
    var t T
    println( alignment(&t.x) )       // case 1
    println( unsafe.Alignof(*&t.x) ) // case 2
    println( unsafe.Alignof(t.x) ) // case 3
    // Is the case 2 equivalent to case 1 or case 3?
}

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