1 // errorcheckwithauto -0 -m -d=inlfuncswithclosures=1
3 // Copyright 2015 The Go Authors. All rights reserved.
4 // Use of this source code is governed by a BSD-style
5 // license that can be found in the LICENSE file.
7 // Test, using compiler diagnostic flags, that inlining is working.
8 // Compiles but does not run.
17 func add2(p *byte, n uintptr) *byte { // ERROR "can inline add2" "leaking param: p to result"
18 return (*byte)(add1(unsafe.Pointer(p), n)) // ERROR "inlining call to add1"
21 func add1(p unsafe.Pointer, x uintptr) unsafe.Pointer { // ERROR "can inline add1" "leaking param: p to result"
22 return unsafe.Pointer(uintptr(p) + x)
25 func f(x *byte) *byte { // ERROR "can inline f" "leaking param: x to result"
26 return add2(x, 1) // ERROR "inlining call to add2" "inlining call to add1"
34 func h(x int) int { // ERROR "can inline h"
38 func i(x int) int { // ERROR "can inline i"
43 func j(x int) int { // ERROR "can inline j"
52 func f2() int { // ERROR "can inline f2"
55 return tmp2(0) // ERROR "inlining call to h"
58 var somethingWrong error
60 // local closures can be inlined
61 func l(x, y int) (int, int, error) { // ERROR "can inline l"
62 e := func(err error) (int, int, error) { // ERROR "can inline l.func1" "func literal does not escape" "leaking param: err to result"
66 e(somethingWrong) // ERROR "inlining call to l.func1"
69 f(nil) // ERROR "inlining call to l.func1"
74 // any re-assignment prevents closure inlining
76 foo := func() int { return 1 } // ERROR "can inline m.func1" "func literal does not escape"
78 foo = func() int { return 2 } // ERROR "can inline m.func2" "func literal does not escape"
82 // address taking prevents closure inlining
84 foo := func() int { return 1 } // ERROR "can inline n.func1" "func literal does not escape"
90 // make sure assignment inside closure is detected
92 foo := func() int { return 1 } // ERROR "can inline o.func1" "func literal does not escape"
93 func(x int) { // ERROR "can inline o.func2"
95 foo = func() int { return 2 } // ERROR "can inline o.func2"
97 }(11) // ERROR "func literal does not escape" "inlining call to o.func2"
101 func p() int { // ERROR "can inline p"
102 return func() int { return 42 }() // ERROR "can inline p.func1" "inlining call to p.func1"
105 func q(x int) int { // ERROR "can inline q"
106 foo := func() int { return x * 2 } // ERROR "can inline q.func1" "func literal does not escape"
107 return foo() // ERROR "inlining call to q.func1"
110 func s0(x int) int { // ERROR "can inline s0"
111 foo := func() { // ERROR "can inline s0.func1" "func literal does not escape"
114 foo() // ERROR "inlining call to s0.func1"
118 func s1(x int) int { // ERROR "can inline s1"
119 foo := func() int { // ERROR "can inline s1.func1" "func literal does not escape"
123 return foo() // ERROR "inlining call to s1.func1"
126 func switchBreak(x, y int) int { // ERROR "can inline switchBreak"
142 func switchType(x interface{}) int { // ERROR "can inline switchType" "x does not escape"
151 // Test that switches on constant things, with constant cases, only cost anything for
152 // the case that matches. See issue 50253.
153 func switchConst1(p func(string)) { // ERROR "can inline switchConst" "p does not escape"
167 func switchConst2() string { // ERROR "can inline switchConst2"
168 switch runtime.GOOS {
175 case "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "100":
181 func switchConst3() string { // ERROR "can inline switchConst3"
182 switch runtime.GOOS {
189 case "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "100":
196 func inlineRangeIntoMe(data []int) { // ERROR "can inline inlineRangeIntoMe" "data does not escape"
197 rangeFunc(data, 12) // ERROR "inlining call to rangeFunc"
200 func rangeFunc(xs []int, b int) int { // ERROR "can inline rangeFunc" "xs does not escape"
201 for i, x := range xs {
211 func (T) meth(int, int) {} // ERROR "can inline T.meth"
213 func k() (T, int, int) { return T{}, 0, 0 } // ERROR "can inline k"
215 func f3() { // ERROR "can inline f3"
216 T.meth(k()) // ERROR "inlining call to k" "inlining call to T.meth"
217 // ERRORAUTO "inlining call to T.meth"
220 func small1() { // ERROR "can inline small1"
223 func small2() int { // ERROR "can inline small2"
224 return runtime.GOMAXPROCS(0)
226 func small3(t T) { // ERROR "can inline small3"
229 func small4(t T) { // not inlineable - has 2 calls.
230 t.meth2(runtime.GOMAXPROCS(0), 5)
232 func (T) meth2(int, int) { // not inlineable - has 2 calls.
237 // Issue #29737 - make sure we can do inlining for a chain of recursive functions
238 func ee() { // ERROR "can inline ee"
239 ff(100) // ERROR "inlining call to ff" "inlining call to gg" "inlining call to hh"
242 func ff(x int) { // ERROR "can inline ff"
248 func gg(x int) { // ERROR "can inline gg"
251 func hh(x int) { // ERROR "can inline hh"
252 ff(x - 1) // ERROR "inlining call to ff" // ERROR "inlining call to gg"
255 // Issue #14768 - make sure we can inline for loops.
256 func for1(fn func() bool) { // ERROR "can inline for1" "fn does not escape"
266 func for2(fn func() bool) { // ERROR "can inline for2" "fn does not escape"
277 // Issue #18493 - make sure we can do inlining of functions with a method value
280 func (a T1) meth(val int) int { // ERROR "can inline T1.meth"
284 func getMeth(t1 T1) func(int) int { // ERROR "can inline getMeth"
285 return t1.meth // ERROR "t1.meth escapes to heap"
286 // ERRORAUTO "inlining call to T1.meth"
289 func ii() { // ERROR "can inline ii"
291 f := getMeth(t1) // ERROR "inlining call to getMeth" "t1.meth does not escape"
295 // Issue #42194 - make sure that functions evaluated in
296 // go and defer statements can be inlined.
298 defer gd1(gd2()) // ERROR "inlining call to gd2"
299 defer gd3()() // ERROR "inlining call to gd3"
300 go gd1(gd2()) // ERROR "inlining call to gd2"
301 go gd3()() // ERROR "inlining call to gd3"
304 func gd2() int { // ERROR "can inline gd2"
308 func gd3() func() { // ERROR "can inline gd3"
312 // Issue #42788 - ensure ODEREF OCONVNOP* OADDR is low cost.
313 func EncodeQuad(d []uint32, x [6]float32) { // ERROR "can inline EncodeQuad" "d does not escape"
315 d[0] = float32bits(x[0]) // ERROR "inlining call to float32bits"
316 d[1] = float32bits(x[1]) // ERROR "inlining call to float32bits"
317 d[2] = float32bits(x[2]) // ERROR "inlining call to float32bits"
318 d[3] = float32bits(x[3]) // ERROR "inlining call to float32bits"
319 d[4] = float32bits(x[4]) // ERROR "inlining call to float32bits"
320 d[5] = float32bits(x[5]) // ERROR "inlining call to float32bits"
323 // float32bits is a copy of math.Float32bits to ensure that
324 // these tests pass with `-gcflags=-l`.
325 func float32bits(f float32) uint32 { // ERROR "can inline float32bits"
326 return *(*uint32)(unsafe.Pointer(&f))
329 // Ensure OCONVNOP is zero cost.
330 func Conv(v uint64) uint64 { // ERROR "can inline Conv"
331 return conv2(conv2(conv2(v))) // ERROR "inlining call to (conv1|conv2)"
333 func conv2(v uint64) uint64 { // ERROR "can inline conv2"
334 return conv1(conv1(conv1(conv1(v)))) // ERROR "inlining call to conv1"
336 func conv1(v uint64) uint64 { // ERROR "can inline conv1"
337 return uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(v)))))))))))
340 func select1(x, y chan bool) int { // ERROR "can inline select1" "x does not escape" "y does not escape"
349 func select2(x, y chan bool) { // ERROR "can inline select2" "x does not escape" "y does not escape"
350 loop: // test that labeled select can be inlined.
358 func inlineSelect2(x, y chan bool) { // ERROR "can inline inlineSelect2" ERROR "x does not escape" "y does not escape"
360 for i := 0; i < 5; i++ {
364 select2(x, y) // ERROR "inlining call to select2"