[go-nuts] go build -gcflags '-N -l' don't work

[刘桂祥]

// example.go
package main


import "runtime"


type S struct{}


func main() {
 var stats runtime.MemStats


 runtime.ReadMemStats(&stats)
 println(stats.Mallocs)
 var x S
 runtime.ReadMemStats(&stats)
 println(stats.Mallocs)
 _ = *ref(x)
 runtime.ReadMemStats(&stats)
 println(stats.Mallocs)
}


func ref(z S) *S {
 return &z
}

go build -gcflags '-N -l' example.go && ./example
or
go run -gcflags '-N -l' example.go

results:
./example.go:21: &z escapes to heap
./example.go:20: moved to heap: z
./example.go:10: main &stats does not escape
./example.go:13: main &stats does not escape
./example.go:16: main &stats does not escape
61
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61


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