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// 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"
_ = x // prevent simple deadcode elimination after inlining
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"
_ = y // prevent simple deadcode elimination after inlining
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 "can inline main.func7"
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")
}
}() // ERROR "func literal does not escape" "inlining call to main.func7"
}
{
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 "can inline main.func10"
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")
}
}() // ERROR "func literal does not escape" "inlining call to main.func10"
}
{
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 "can inline main.func12"
return func(x int) int { // ERROR "can inline main.func12" "func literal escapes to heap"
return x + 1
}, 42
}() // ERROR "func literal does not escape" "inlining call to main.func12"
if y(40) != 41 {
ppanic("y(40) != 41")
}
}
{
func() { // ERROR "can inline main.func13"
y := func(x int) int { // ERROR "func literal does not escape" "can inline main.func13.1"
return x + 2
}
y, sink = func() (func(int) int, int) { // ERROR "can inline main.func13.2" "can inline main.main.func13.func35"
return func(x int) int { // ERROR "can inline main.func13.2" "func literal escapes to heap"
return x + 1
}, 42
}() // ERROR "func literal does not escape" "inlining call to main.func13.2"
if y(40) != 41 {
ppanic("y(40) != 41")
}
}() // ERROR "func literal does not escape" "inlining call to main.func13" "inlining call to main.main.func13.func35"
}
{
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 "can inline main.func16"
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")
}
}() // ERROR "func literal does not escape" "inlining call to main.func16" "map\[int\]func\(int\) int{...} does not escape" "func literal escapes to heap"
}
{
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 "can inline main.func19"
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")
}
}() // ERROR "func literal does not escape" "inlining call to main.func19"
}
{
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"
_ = y // prevent simple deadcode elimination after inlining
ppanic("y() != 42")
}
}
{
x := 42
if z := func(y int) int { // ERROR "can inline main.func22"
return func() int { // ERROR "can inline main.func22.1" "can inline main.main.func22.func40"
return x + y
}() // ERROR "inlining call to main.func22.1"
}(1); z != 43 { // ERROR "inlining call to main.func22" "inlining call to main.main.func22.func40"
ppanic("z != 43")
}
if z := func(y int) int { // ERROR "func literal does not escape" "can inline main.func23"
return func() int { // ERROR "can inline main.func23.1" "can inline main.main.func23.func41"
return x + y
}() // ERROR "inlining call to main.func23.1"
}; z(1) != 43 { // ERROR "inlining call to main.func23" "inlining call to main.main.func23.func41"
_ = z // prevent simple deadcode elimination after inlining
ppanic("z(1) != 43")
}
}
{
a := 1
func() { // ERROR "can inline main.func24"
func() { // ERROR "can inline main.func24" "can inline main.main.func24.func42"
a = 2
}() // ERROR "inlining call to main.func24"
}() // ERROR "inlining call to main.func24" "inlining call to main.main.func24.func42"
if a != 2 {
ppanic("a != 2")
}
}
{
b := 2
func(b int) { // ERROR "can inline main.func25"
func() { // ERROR "can inline main.func25.1" "can inline main.main.func25.func43"
b = 3
}() // ERROR "inlining call to main.func25.1"
if b != 3 {
ppanic("b != 3")
}
}(b) // ERROR "inlining call to main.func25" "inlining call to main.main.func25.func43"
if b != 2 {
ppanic("b != 2")
}
}
{
c := 3
func() { // ERROR "can inline main.func26"
c = 4
func() {
if c != 4 {
ppanic("c != 4")
}
recover() // prevent inlining
}()
}() // ERROR "inlining call to main.func26" "func literal does not escape"
if c != 4 {
ppanic("c != 4")
}
}
{
a := 2
// This has an unfortunate exponential growth, where as we visit each
// function, we inline the inner closure, and that constructs a new
// function for any closures inside the inner function, and then we
// revisit those. E.g., func34 and func36 are constructed by the inliner.
if r := func(x int) int { // ERROR "can inline main.func27"
b := 3
return func(y int) int { // ERROR "can inline main.func27.1" "can inline main.main.func27.func45"
c := 5
return func(z int) int { // ERROR "can inline main.func27.1.1" "can inline main.main.func27.func45.1" "can inline main.func27.main.func27.1.2" "can inline main.main.func27.main.main.func27.func45.func48"
return a*x + b*y + c*z
}(10) // ERROR "inlining call to main.func27.1.1"
}(100) // ERROR "inlining call to main.func27.1" "inlining call to main.func27.main.func27.1.2"
}(1000); r != 2350 { // ERROR "inlining call to main.func27" "inlining call to main.main.func27.func45" "inlining call to main.main.func27.main.main.func27.func45.func48"
ppanic("r != 2350")
}
}
{
a := 2
if r := func(x int) int { // ERROR "can inline main.func28"
b := 3
return func(y int) int { // ERROR "can inline main.func28.1" "can inline main.main.func28.func46"
c := 5
func(z int) { // ERROR "can inline main.func28.1.1" "can inline main.func28.main.func28.1.2" "can inline main.main.func28.func46.1" "can inline main.main.func28.main.main.func28.func46.func49"
a = a * x
b = b * y
c = c * z
}(10) // ERROR "inlining call to main.func28.1.1"
return a + c
}(100) + b // ERROR "inlining call to main.func28.1" "inlining call to main.func28.main.func28.1.2"
}(1000); r != 2350 { // ERROR "inlining call to main.func28" "inlining call to main.main.func28.func46" "inlining call to main.main.func28.main.main.func28.func46.func49"
ppanic("r != 2350")
}
if a != 2000 {
ppanic("a != 2000")
}
}
}
//go:noinline
func notmain() {
{
// This duplicates the first block in main, but without the "_ = x" for closure x.
// This allows dead code elimination of x before escape analysis,
// thus "func literal does not escape" should not appear.
if x := func() int { // ERROR "can inline notmain.func1"
return 1
}(); x != 1 { // ERROR "inlining call to notmain.func1"
ppanic("x != 1")
}
if x := func() int { // ERROR "can inline notmain.func2"
return 1
}; x() != 1 { // ERROR "inlining call to notmain.func2"
ppanic("x() != 1")
}
}
}
//go:noinline
func ppanic(s string) { // ERROR "leaking param: s"
panic(s) // ERROR "s escapes to heap"
}
|
