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"
114 foo := func(x int) int { // ERROR "can inline r.func1" "func literal does not escape"
117 bar := func(x int) int { // ERROR "func literal does not escape" "can inline r.func2"
118 return x + func(y int) int { // ERROR "can inline r.func2.1" "can inline r.r.func2.func3"
120 }(x) // ERROR "inlining call to r.func2.1"
122 return foo(42) + bar(42) // ERROR "inlining call to r.func1" "inlining call to r.func2" "inlining call to r.r.func2.func3"
125 func s0(x int) int { // ERROR "can inline s0"
126 foo := func() { // ERROR "can inline s0.func1" "func literal does not escape"
129 foo() // ERROR "inlining call to s0.func1"
133 func s1(x int) int { // ERROR "can inline s1"
134 foo := func() int { // ERROR "can inline s1.func1" "func literal does not escape"
138 return foo() // ERROR "inlining call to s1.func1"
141 func switchBreak(x, y int) int { // ERROR "can inline switchBreak"
157 func switchType(x interface{}) int { // ERROR "can inline switchType" "x does not escape"
166 // Test that switches on constant things, with constant cases, only cost anything for
167 // the case that matches. See issue 50253.
168 func switchConst1(p func(string)) { // ERROR "can inline switchConst" "p does not escape"
182 func switchConst2() string { // ERROR "can inline switchConst2"
183 switch runtime.GOOS {
190 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 switchConst3() string { // ERROR "can inline switchConst3"
197 switch runtime.GOOS {
204 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":
210 func switchConst4() { // ERROR "can inline switchConst4"
211 const intSize = 32 << (^uint(0) >> 63)
212 want := func() string { // ERROR "can inline switchConst4.func1"
221 }() // ERROR "inlining call to switchConst4.func1"
225 func inlineRangeIntoMe(data []int) { // ERROR "can inline inlineRangeIntoMe" "data does not escape"
226 rangeFunc(data, 12) // ERROR "inlining call to rangeFunc"
229 func rangeFunc(xs []int, b int) int { // ERROR "can inline rangeFunc" "xs does not escape"
230 for i, x := range xs {
240 func (T) meth(int, int) {} // ERROR "can inline T.meth"
242 func k() (T, int, int) { return T{}, 0, 0 } // ERROR "can inline k"
244 func f3() { // ERROR "can inline f3"
245 T.meth(k()) // ERROR "inlining call to k" "inlining call to T.meth"
246 // ERRORAUTO "inlining call to T.meth"
249 func small1() { // ERROR "can inline small1"
252 func small2() int { // ERROR "can inline small2"
253 return runtime.GOMAXPROCS(0)
255 func small3(t T) { // ERROR "can inline small3"
258 func small4(t T) { // not inlineable - has 2 calls.
259 t.meth2(runtime.GOMAXPROCS(0), 5)
261 func (T) meth2(int, int) { // not inlineable - has 2 calls.
266 // Issue #29737 - make sure we can do inlining for a chain of recursive functions
267 func ee() { // ERROR "can inline ee"
268 ff(100) // ERROR "inlining call to ff" "inlining call to gg" "inlining call to hh"
271 func ff(x int) { // ERROR "can inline ff"
275 gg(x - 1) // ERROR "inlining call to gg" "inlining call to hh"
277 func gg(x int) { // ERROR "can inline gg"
278 hh(x - 1) // ERROR "inlining call to hh" "inlining call to ff"
280 func hh(x int) { // ERROR "can inline hh"
281 ff(x - 1) // ERROR "inlining call to ff" "inlining call to gg"
284 // Issue #14768 - make sure we can inline for loops.
285 func for1(fn func() bool) { // ERROR "can inline for1" "fn does not escape"
295 func for2(fn func() bool) { // ERROR "can inline for2" "fn does not escape"
306 // Issue #18493 - make sure we can do inlining of functions with a method value
309 func (a T1) meth(val int) int { // ERROR "can inline T1.meth"
313 func getMeth(t1 T1) func(int) int { // ERROR "can inline getMeth"
314 return t1.meth // ERROR "t1.meth escapes to heap"
315 // ERRORAUTO "inlining call to T1.meth"
318 func ii() { // ERROR "can inline ii"
320 f := getMeth(t1) // ERROR "inlining call to getMeth" "t1.meth does not escape"
324 // Issue #42194 - make sure that functions evaluated in
325 // go and defer statements can be inlined.
327 defer gd1(gd2()) // ERROR "inlining call to gd2"
328 defer gd3()() // ERROR "inlining call to gd3"
329 go gd1(gd2()) // ERROR "inlining call to gd2"
330 go gd3()() // ERROR "inlining call to gd3"
333 func gd2() int { // ERROR "can inline gd2"
337 func gd3() func() { // ERROR "can inline gd3"
341 // Issue #42788 - ensure ODEREF OCONVNOP* OADDR is low cost.
342 func EncodeQuad(d []uint32, x [6]float32) { // ERROR "can inline EncodeQuad" "d does not escape"
344 d[0] = float32bits(x[0]) // ERROR "inlining call to float32bits"
345 d[1] = float32bits(x[1]) // ERROR "inlining call to float32bits"
346 d[2] = float32bits(x[2]) // ERROR "inlining call to float32bits"
347 d[3] = float32bits(x[3]) // ERROR "inlining call to float32bits"
348 d[4] = float32bits(x[4]) // ERROR "inlining call to float32bits"
349 d[5] = float32bits(x[5]) // ERROR "inlining call to float32bits"
352 // float32bits is a copy of math.Float32bits to ensure that
353 // these tests pass with `-gcflags=-l`.
354 func float32bits(f float32) uint32 { // ERROR "can inline float32bits"
355 return *(*uint32)(unsafe.Pointer(&f))
358 // Ensure OCONVNOP is zero cost.
359 func Conv(v uint64) uint64 { // ERROR "can inline Conv"
360 return conv2(conv2(conv2(v))) // ERROR "inlining call to (conv1|conv2)"
362 func conv2(v uint64) uint64 { // ERROR "can inline conv2"
363 return conv1(conv1(conv1(conv1(v)))) // ERROR "inlining call to conv1"
365 func conv1(v uint64) uint64 { // ERROR "can inline conv1"
366 return uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(v)))))))))))
369 func select1(x, y chan bool) int { // ERROR "can inline select1" "x does not escape" "y does not escape"
378 func select2(x, y chan bool) { // ERROR "can inline select2" "x does not escape" "y does not escape"
379 loop: // test that labeled select can be inlined.
387 func inlineSelect2(x, y chan bool) { // ERROR "can inline inlineSelect2" ERROR "x does not escape" "y does not escape"
389 for i := 0; i < 5; i++ {
393 select2(x, y) // ERROR "inlining call to select2"
397 // Issue #62211: inlining a function with unreachable "return"
398 // statements could trip up phi insertion.
399 func issue62211(x bool) { // ERROR "can inline issue62211"
400 if issue62211F(x) { // ERROR "inlining call to issue62211F"
402 if issue62211G(x) { // ERROR "inlining call to issue62211G"
405 // Initial fix CL caused a "non-monotonic scope positions" failure
406 // on code like this.
412 func issue62211F(x bool) bool { // ERROR "can inline issue62211F"
419 func issue62211G(x bool) bool { // ERROR "can inline issue62211G"