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.
18 func add2(p *byte, n uintptr) *byte { // ERROR "can inline add2" "leaking param: p to result"
19 return (*byte)(add1(unsafe.Pointer(p), n)) // ERROR "inlining call to add1"
22 func add1(p unsafe.Pointer, x uintptr) unsafe.Pointer { // ERROR "can inline add1" "leaking param: p to result"
23 return unsafe.Pointer(uintptr(p) + x)
26 func f(x *byte) *byte { // ERROR "can inline f" "leaking param: x to result"
27 return add2(x, 1) // ERROR "inlining call to add2" "inlining call to add1"
35 func h(x int) int { // ERROR "can inline h"
39 func i(x int) int { // ERROR "can inline i"
44 func j(x int) int { // ERROR "can inline j"
53 func f2() int { // ERROR "can inline f2"
56 return tmp2(0) // ERROR "inlining call to h"
59 var abc = errors.New("abc") // ERROR "inlining call to errors.New"
61 var somethingWrong error
63 // local closures can be inlined
64 func l(x, y int) (int, int, error) { // ERROR "can inline l"
65 e := func(err error) (int, int, error) { // ERROR "can inline l.func1" "func literal does not escape" "leaking param: err to result"
69 e(somethingWrong) // ERROR "inlining call to l.func1"
72 f(nil) // ERROR "inlining call to l.func1"
77 // any re-assignment prevents closure inlining
79 foo := func() int { return 1 } // ERROR "can inline m.func1" "func literal does not escape"
81 foo = func() int { return 2 } // ERROR "can inline m.func2" "func literal does not escape"
85 // address taking prevents closure inlining
87 foo := func() int { return 1 } // ERROR "can inline n.func1" "func literal does not escape"
93 // make sure assignment inside closure is detected
95 foo := func() int { return 1 } // ERROR "can inline o.func1" "func literal does not escape"
96 func(x int) { // ERROR "can inline o.func2"
98 foo = func() int { return 2 } // ERROR "can inline o.func2"
100 }(11) // ERROR "func literal does not escape" "inlining call to o.func2"
104 func p() int { // ERROR "can inline p"
105 return func() int { return 42 }() // ERROR "can inline p.func1" "inlining call to p.func1"
108 func q(x int) int { // ERROR "can inline q"
109 foo := func() int { return x * 2 } // ERROR "can inline q.func1" "func literal does not escape"
110 return foo() // ERROR "inlining call to q.func1"
113 func s0(x int) int { // ERROR "can inline s0"
114 foo := func() { // ERROR "can inline s0.func1" "func literal does not escape"
117 foo() // ERROR "inlining call to s0.func1"
121 func s1(x int) int { // ERROR "can inline s1"
122 foo := func() int { // ERROR "can inline s1.func1" "func literal does not escape"
126 return foo() // ERROR "inlining call to s1.func1"
129 func switchBreak(x, y int) int { // ERROR "can inline switchBreak"
145 func switchType(x interface{}) int { // ERROR "can inline switchType" "x does not escape"
154 // Test that switches on constant things, with constant cases, only cost anything for
155 // the case that matches. See issue 50253.
156 func switchConst1(p func(string)) { // ERROR "can inline switchConst" "p does not escape"
170 func switchConst2() string { // ERROR "can inline switchConst2"
171 switch runtime.GOOS {
178 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":
184 func switchConst3() string { // ERROR "can inline switchConst3"
185 switch runtime.GOOS {
192 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":
198 func switchConst4() { // ERROR "can inline switchConst4"
199 const intSize = 32 << (^uint(0) >> 63)
200 want := func() string { // ERROR "can inline switchConst4.func1"
209 }() // ERROR "inlining call to switchConst4.func1"
213 func inlineRangeIntoMe(data []int) { // ERROR "can inline inlineRangeIntoMe" "data does not escape"
214 rangeFunc(data, 12) // ERROR "inlining call to rangeFunc"
217 func rangeFunc(xs []int, b int) int { // ERROR "can inline rangeFunc" "xs does not escape"
218 for i, x := range xs {
228 func (T) meth(int, int) {} // ERROR "can inline T.meth"
230 func k() (T, int, int) { return T{}, 0, 0 } // ERROR "can inline k"
232 func f3() { // ERROR "can inline f3"
233 T.meth(k()) // ERROR "inlining call to k" "inlining call to T.meth"
234 // ERRORAUTO "inlining call to T.meth"
237 func small1() { // ERROR "can inline small1"
240 func small2() int { // ERROR "can inline small2"
241 return runtime.GOMAXPROCS(0)
243 func small3(t T) { // ERROR "can inline small3"
246 func small4(t T) { // not inlineable - has 2 calls.
247 t.meth2(runtime.GOMAXPROCS(0), 5)
249 func (T) meth2(int, int) { // not inlineable - has 2 calls.
254 // Issue #29737 - make sure we can do inlining for a chain of recursive functions
255 func ee() { // ERROR "can inline ee"
256 ff(100) // ERROR "inlining call to ff" "inlining call to gg" "inlining call to hh"
259 func ff(x int) { // ERROR "can inline ff"
263 gg(x - 1) // ERROR "inlining call to gg" "inlining call to hh"
265 func gg(x int) { // ERROR "can inline gg"
266 hh(x - 1) // ERROR "inlining call to hh" "inlining call to ff"
268 func hh(x int) { // ERROR "can inline hh"
269 ff(x - 1) // ERROR "inlining call to ff" "inlining call to gg"
272 // Issue #14768 - make sure we can inline for loops.
273 func for1(fn func() bool) { // ERROR "can inline for1" "fn does not escape"
283 func for2(fn func() bool) { // ERROR "can inline for2" "fn does not escape"
294 // Issue #18493 - make sure we can do inlining of functions with a method value
297 func (a T1) meth(val int) int { // ERROR "can inline T1.meth"
301 func getMeth(t1 T1) func(int) int { // ERROR "can inline getMeth"
302 return t1.meth // ERROR "t1.meth escapes to heap"
303 // ERRORAUTO "inlining call to T1.meth"
306 func ii() { // ERROR "can inline ii"
308 f := getMeth(t1) // ERROR "inlining call to getMeth" "t1.meth does not escape"
312 // Issue #42194 - make sure that functions evaluated in
313 // go and defer statements can be inlined.
315 defer gd1(gd2()) // ERROR "inlining call to gd2"
316 defer gd3()() // ERROR "inlining call to gd3"
317 go gd1(gd2()) // ERROR "inlining call to gd2"
318 go gd3()() // ERROR "inlining call to gd3"
321 func gd2() int { // ERROR "can inline gd2"
325 func gd3() func() { // ERROR "can inline gd3"
329 // Issue #42788 - ensure ODEREF OCONVNOP* OADDR is low cost.
330 func EncodeQuad(d []uint32, x [6]float32) { // ERROR "can inline EncodeQuad" "d does not escape"
332 d[0] = float32bits(x[0]) // ERROR "inlining call to float32bits"
333 d[1] = float32bits(x[1]) // ERROR "inlining call to float32bits"
334 d[2] = float32bits(x[2]) // ERROR "inlining call to float32bits"
335 d[3] = float32bits(x[3]) // ERROR "inlining call to float32bits"
336 d[4] = float32bits(x[4]) // ERROR "inlining call to float32bits"
337 d[5] = float32bits(x[5]) // ERROR "inlining call to float32bits"
340 // float32bits is a copy of math.Float32bits to ensure that
341 // these tests pass with `-gcflags=-l`.
342 func float32bits(f float32) uint32 { // ERROR "can inline float32bits"
343 return *(*uint32)(unsafe.Pointer(&f))
346 // Ensure OCONVNOP is zero cost.
347 func Conv(v uint64) uint64 { // ERROR "can inline Conv"
348 return conv2(conv2(conv2(v))) // ERROR "inlining call to (conv1|conv2)"
350 func conv2(v uint64) uint64 { // ERROR "can inline conv2"
351 return conv1(conv1(conv1(conv1(v)))) // ERROR "inlining call to conv1"
353 func conv1(v uint64) uint64 { // ERROR "can inline conv1"
354 return uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(v)))))))))))
357 func select1(x, y chan bool) int { // ERROR "can inline select1" "x does not escape" "y does not escape"
366 func select2(x, y chan bool) { // ERROR "can inline select2" "x does not escape" "y does not escape"
367 loop: // test that labeled select can be inlined.
375 func inlineSelect2(x, y chan bool) { // ERROR "can inline inlineSelect2" ERROR "x does not escape" "y does not escape"
377 for i := 0; i < 5; i++ {
381 select2(x, y) // ERROR "inlining call to select2"