Hello!
Recently I read some go source code and when I read the noescape function
in runtime/stubs.go, I have a doubt about it.
// noescape hides a pointer from escape analysis. noescape is
// the identity function but escape analysis doesn't think the
// output depends on the input. noescape is inlined and currently
// compiles down to zero instructions.
// USE CAREFULLY!
//go:nosplit
func noescape(p unsafe.Pointer) unsafe.Pointer {
x := uintptr(p)
return unsafe.Pointer(x ^ 0)
}
I don't know what's the purpose of the exclusive or operation? Does it
necessary?
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