mirror of
https://github.com/golang/go
synced 2024-11-23 10:00:03 -07:00
6113db0bb4
Currently, typecheck leaves arguments to OPANIC as their original
type. This CL changes it to insert implicit OCONVIFACE operations to
convert arguments to `interface{}` like how any other function call
would be handled.
No immediate benefits, other than getting to remove a tiny bit of
special-case logic in order.go's handling of OPANICs. Instead, the
generic code path for handling OCONVIFACE is used, if necessary.
Longer term, this should be marginally helpful for #43753, as it
reduces the number of cases where we need values to be addressable for
runtime calls.
However, this does require adding some hacks to appease existing
tests:
1. We need yet another kludge in inline budgeting, to ensure that
reflect.flag.mustBe stays inlinable for cmd/compile/internal/test's
TestIntendedInlining.
2. Since the OCONVIFACE expressions are now being introduced during
typecheck, they're now visible to escape analysis. So expressions like
"panic(1)" are now seen as "panic(interface{}(1))", and escape
analysis warns that the "interface{}(1)" escapes to the heap. These
have always escaped to heap, just now we're accurately reporting about
it.
(Also, unfortunately fmt.go hides implicit conversions by default in
diagnostics messages, so instead of reporting "interface{}(1) escapes
to heap", it actually reports "1 escapes to heap", which is
confusing. However, this confusing messaging also isn't new.)
Change-Id: Icedf60e1d2e464e219441b8d1233a313770272af
Reviewed-on: https://go-review.googlesource.com/c/go/+/284412
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Matthew Dempsky <mdempsky@google.com>
290 lines
6.8 KiB
Go
290 lines
6.8 KiB
Go
// Copyright 2017 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.
|
|
|
|
// Check correctness of various closure corner cases
|
|
// that are expected to be inlined
|
|
|
|
package main
|
|
|
|
var ok bool
|
|
var sink int
|
|
|
|
func main() {
|
|
{
|
|
if x := func() int { // ERROR "can inline main.func1"
|
|
return 1
|
|
}(); x != 1 { // ERROR "inlining call to main.func1"
|
|
ppanic("x != 1")
|
|
}
|
|
if x := func() int { // ERROR "can inline main.func2" "func literal does not escape"
|
|
return 1
|
|
}; x() != 1 { // ERROR "inlining call to main.func2"
|
|
ppanic("x() != 1")
|
|
}
|
|
}
|
|
|
|
{
|
|
if y := func(x int) int { // ERROR "can inline main.func3"
|
|
return x + 2
|
|
}(40); y != 42 { // ERROR "inlining call to main.func3"
|
|
ppanic("y != 42")
|
|
}
|
|
if y := func(x int) int { // ERROR "can inline main.func4" "func literal does not escape"
|
|
return x + 2
|
|
}; y(40) != 42 { // ERROR "inlining call to main.func4"
|
|
ppanic("y(40) != 42")
|
|
}
|
|
}
|
|
|
|
{
|
|
y := func(x int) int { // ERROR "can inline main.func5" "func literal does not escape"
|
|
return x + 2
|
|
}
|
|
y = func(x int) int { // ERROR "can inline main.func6" "func literal does not escape"
|
|
return x + 1
|
|
}
|
|
if y(40) != 41 {
|
|
ppanic("y(40) != 41")
|
|
}
|
|
}
|
|
|
|
{
|
|
func() { // ERROR "func literal does not escape"
|
|
y := func(x int) int { // ERROR "can inline main.func7.1" "func literal does not escape"
|
|
return x + 2
|
|
}
|
|
y = func(x int) int { // ERROR "can inline main.func7.2" "func literal does not escape"
|
|
return x + 1
|
|
}
|
|
if y(40) != 41 {
|
|
ppanic("y(40) != 41")
|
|
}
|
|
}()
|
|
}
|
|
|
|
{
|
|
y := func(x int) int { // ERROR "can inline main.func8" "func literal does not escape"
|
|
return x + 2
|
|
}
|
|
y, sink = func(x int) int { // ERROR "can inline main.func9" "func literal does not escape"
|
|
return x + 1
|
|
}, 42
|
|
if y(40) != 41 {
|
|
ppanic("y(40) != 41")
|
|
}
|
|
}
|
|
|
|
{
|
|
func() { // ERROR "func literal does not escape"
|
|
y := func(x int) int { // ERROR "can inline main.func10.1" "func literal does not escape"
|
|
return x + 2
|
|
}
|
|
y, sink = func(x int) int { // ERROR "can inline main.func10.2" "func literal does not escape"
|
|
return x + 1
|
|
}, 42
|
|
if y(40) != 41 {
|
|
ppanic("y(40) != 41")
|
|
}
|
|
}()
|
|
}
|
|
|
|
{
|
|
y := func(x int) int { // ERROR "can inline main.func11" "func literal does not escape"
|
|
return x + 2
|
|
}
|
|
y, sink = func() (func(int) int, int) { // ERROR "func literal does not escape"
|
|
return func(x int) int { // ERROR "can inline main.func12" "func literal escapes"
|
|
return x + 1
|
|
}, 42
|
|
}()
|
|
if y(40) != 41 {
|
|
ppanic("y(40) != 41")
|
|
}
|
|
}
|
|
|
|
{
|
|
func() { // ERROR "func literal does not escape"
|
|
y := func(x int) int { // ERROR "can inline main.func13.1" "func literal does not escape"
|
|
return x + 2
|
|
}
|
|
y, sink = func() (func(int) int, int) { // ERROR "func literal does not escape"
|
|
return func(x int) int { // ERROR "can inline main.func13.2" "func literal escapes"
|
|
return x + 1
|
|
}, 42
|
|
}()
|
|
if y(40) != 41 {
|
|
ppanic("y(40) != 41")
|
|
}
|
|
}()
|
|
}
|
|
|
|
{
|
|
y := func(x int) int { // ERROR "can inline main.func14" "func literal does not escape"
|
|
return x + 2
|
|
}
|
|
y, ok = map[int]func(int) int{ // ERROR "does not escape"
|
|
0: func(x int) int { return x + 1 }, // ERROR "can inline main.func15" "func literal escapes"
|
|
}[0]
|
|
if y(40) != 41 {
|
|
ppanic("y(40) != 41")
|
|
}
|
|
}
|
|
|
|
{
|
|
func() { // ERROR "func literal does not escape"
|
|
y := func(x int) int { // ERROR "can inline main.func16.1" "func literal does not escape"
|
|
return x + 2
|
|
}
|
|
y, ok = map[int]func(int) int{ // ERROR "does not escape"
|
|
0: func(x int) int { return x + 1 }, // ERROR "can inline main.func16.2" "func literal escapes"
|
|
}[0]
|
|
if y(40) != 41 {
|
|
ppanic("y(40) != 41")
|
|
}
|
|
}()
|
|
}
|
|
|
|
{
|
|
y := func(x int) int { // ERROR "can inline main.func17" "func literal does not escape"
|
|
return x + 2
|
|
}
|
|
y, ok = interface{}(func(x int) int { // ERROR "can inline main.func18" "does not escape"
|
|
return x + 1
|
|
}).(func(int) int)
|
|
if y(40) != 41 {
|
|
ppanic("y(40) != 41")
|
|
}
|
|
}
|
|
|
|
{
|
|
func() { // ERROR "func literal does not escape"
|
|
y := func(x int) int { // ERROR "can inline main.func19.1" "func literal does not escape"
|
|
return x + 2
|
|
}
|
|
y, ok = interface{}(func(x int) int { // ERROR "can inline main.func19.2" "does not escape"
|
|
return x + 1
|
|
}).(func(int) int)
|
|
if y(40) != 41 {
|
|
ppanic("y(40) != 41")
|
|
}
|
|
}()
|
|
}
|
|
|
|
{
|
|
x := 42
|
|
if y := func() int { // ERROR "can inline main.func20"
|
|
return x
|
|
}(); y != 42 { // ERROR "inlining call to main.func20"
|
|
ppanic("y != 42")
|
|
}
|
|
if y := func() int { // ERROR "can inline main.func21" "func literal does not escape"
|
|
return x
|
|
}; y() != 42 { // ERROR "inlining call to main.func21"
|
|
ppanic("y() != 42")
|
|
}
|
|
}
|
|
|
|
{
|
|
x := 42
|
|
if z := func(y int) int { // ERROR "func literal does not escape"
|
|
return func() int { // ERROR "can inline main.func22.1"
|
|
return x + y
|
|
}() // ERROR "inlining call to main.func22.1"
|
|
}(1); z != 43 {
|
|
ppanic("z != 43")
|
|
}
|
|
if z := func(y int) int { // ERROR "func literal does not escape"
|
|
return func() int { // ERROR "can inline main.func23.1"
|
|
return x + y
|
|
}() // ERROR "inlining call to main.func23.1"
|
|
}; z(1) != 43 {
|
|
ppanic("z(1) != 43")
|
|
}
|
|
}
|
|
|
|
{
|
|
a := 1
|
|
func() { // ERROR "func literal does not escape"
|
|
func() { // ERROR "can inline main.func24"
|
|
a = 2
|
|
}() // ERROR "inlining call to main.func24"
|
|
}()
|
|
if a != 2 {
|
|
ppanic("a != 2")
|
|
}
|
|
}
|
|
|
|
{
|
|
b := 2
|
|
func(b int) { // ERROR "func literal does not escape"
|
|
func() { // ERROR "can inline main.func25.1"
|
|
b = 3
|
|
}() // ERROR "inlining call to main.func25.1"
|
|
if b != 3 {
|
|
ppanic("b != 3")
|
|
}
|
|
}(b)
|
|
if b != 2 {
|
|
ppanic("b != 2")
|
|
}
|
|
}
|
|
|
|
{
|
|
c := 3
|
|
func() { // ERROR "func literal does not escape"
|
|
c = 4
|
|
func() { // ERROR "func literal does not escape"
|
|
if c != 4 {
|
|
ppanic("c != 4")
|
|
}
|
|
recover() // prevent inlining
|
|
}()
|
|
}()
|
|
if c != 4 {
|
|
ppanic("c != 4")
|
|
}
|
|
}
|
|
|
|
{
|
|
a := 2
|
|
if r := func(x int) int { // ERROR "func literal does not escape"
|
|
b := 3
|
|
return func(y int) int { // ERROR "func literal does not escape"
|
|
c := 5
|
|
return func(z int) int { // ERROR "can inline main.func27.1.1"
|
|
return a*x + b*y + c*z
|
|
}(10) // ERROR "inlining call to main.func27.1.1"
|
|
}(100)
|
|
}(1000); r != 2350 {
|
|
ppanic("r != 2350")
|
|
}
|
|
}
|
|
|
|
{
|
|
a := 2
|
|
if r := func(x int) int { // ERROR "func literal does not escape"
|
|
b := 3
|
|
return func(y int) int { // ERROR "func literal does not escape"
|
|
c := 5
|
|
func(z int) { // ERROR "can inline main.func28.1.1"
|
|
a = a * x
|
|
b = b * y
|
|
c = c * z
|
|
}(10) // ERROR "inlining call to main.func28.1.1"
|
|
return a + c
|
|
}(100) + b
|
|
}(1000); r != 2350 {
|
|
ppanic("r != 2350")
|
|
}
|
|
if a != 2000 {
|
|
ppanic("a != 2000")
|
|
}
|
|
}
|
|
}
|
|
|
|
//go:noinline
|
|
func ppanic(s string) { // ERROR "leaking param: s"
|
|
panic(s) // ERROR "s escapes to heap"
|
|
}
|