mirror of
https://github.com/golang/go
synced 2024-11-17 23:44:48 -07:00
e99e9a6e01
The compiler renames anonymous and blank result parameters to ~rN or ~bN, but the current semantics for computing N are rather annoying and difficult to reproduce cleanly. They also lead to difficult to read escape analysis results in tests. This CL changes N to always be calculated as the parameter's index within the function's result parameter tuple. E.g., if a function has a single result, it will now always be named "~r0". The normative change to this CL is fairly simple, but it requires updating a lot of test expectations. Change-Id: I58a3c94de00cb822cb94efe52d115531193c993c Reviewed-on: https://go-review.googlesource.com/c/go/+/323010 Trust: Matthew Dempsky <mdempsky@google.com> Trust: Dan Scales <danscales@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Dan Scales <danscales@google.com>
75 lines
1.0 KiB
Go
75 lines
1.0 KiB
Go
// errorcheck -0 -m -l
|
|
|
|
// 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.
|
|
|
|
// Test escape analysis for function parameters.
|
|
|
|
package foo
|
|
|
|
var Ssink *string
|
|
|
|
type U struct {
|
|
_sp *string
|
|
_spp **string
|
|
}
|
|
|
|
func A(sp *string, spp **string) U { // ERROR "leaking param: sp to result ~r0 level=0$" "leaking param: spp to result ~r0 level=0$"
|
|
return U{sp, spp}
|
|
}
|
|
|
|
func B(spp **string) U { // ERROR "leaking param: spp to result ~r0 level=0$"
|
|
return U{*spp, spp}
|
|
}
|
|
|
|
func tA1() {
|
|
s := "cat"
|
|
sp := &s
|
|
spp := &sp
|
|
u := A(sp, spp)
|
|
_ = u
|
|
println(s)
|
|
}
|
|
|
|
func tA2() {
|
|
s := "cat"
|
|
sp := &s
|
|
spp := &sp
|
|
u := A(sp, spp)
|
|
println(*u._sp)
|
|
}
|
|
|
|
func tA3() {
|
|
s := "cat"
|
|
sp := &s
|
|
spp := &sp
|
|
u := A(sp, spp)
|
|
println(**u._spp)
|
|
}
|
|
|
|
func tB1() {
|
|
s := "cat"
|
|
sp := &s
|
|
spp := &sp
|
|
u := B(spp)
|
|
_ = u
|
|
println(s)
|
|
}
|
|
|
|
func tB2() {
|
|
s := "cat"
|
|
sp := &s
|
|
spp := &sp
|
|
u := B(spp)
|
|
println(*u._sp)
|
|
}
|
|
|
|
func tB3() {
|
|
s := "cat"
|
|
sp := &s
|
|
spp := &sp
|
|
u := B(spp)
|
|
println(**u._spp)
|
|
}
|