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 somethingWrong error
61 // local closures can be inlined
62 func l(x, y int) (int, int, error) { // ERROR "can inline l"
63 e := func(err error) (int, int, error) { // ERROR "can inline l.func1" "func literal does not escape" "leaking param: err to result"
67 e(somethingWrong) // ERROR "inlining call to l.func1"
70 f(nil) // ERROR "inlining call to l.func1"
75 // any re-assignment prevents closure inlining
77 foo := func() int { return 1 } // ERROR "can inline m.func1" "func literal does not escape"
79 foo = func() int { return 2 } // ERROR "can inline m.func2" "func literal does not escape"
83 // address taking prevents closure inlining
85 foo := func() int { return 1 } // ERROR "can inline n.func1" "func literal does not escape"
91 // make sure assignment inside closure is detected
93 foo := func() int { return 1 } // ERROR "can inline o.func1" "func literal does not escape"
94 func(x int) { // ERROR "can inline o.func2"
96 foo = func() int { return 2 } // ERROR "can inline o.func2"
98 }(11) // ERROR "func literal does not escape" "inlining call to o.func2"
102 func p() int { // ERROR "can inline p"
103 return func() int { return 42 }() // ERROR "can inline p.func1" "inlining call to p.func1"
106 func q(x int) int { // ERROR "can inline q"
107 foo := func() int { return x * 2 } // ERROR "can inline q.func1" "func literal does not escape"
108 return foo() // ERROR "inlining call to q.func1"
112 foo := func(x int) int { // ERROR "can inline r.func1" "func literal does not escape"
115 bar := func(x int) int { // ERROR "func literal does not escape" "can inline r.func2"
116 return x + func(y int) int { // ERROR "can inline r.func2.1" "can inline r.func3"
118 }(x) // ERROR "inlining call to r.func2.1"
120 return foo(42) + bar(42) // ERROR "inlining call to r.func1" "inlining call to r.func2" "inlining call to r.func3"
123 func s0(x int) int { // ERROR "can inline s0"
124 foo := func() { // ERROR "can inline s0.func1" "func literal does not escape"
127 foo() // ERROR "inlining call to s0.func1"
131 func s1(x int) int { // ERROR "can inline s1"
132 foo := func() int { // ERROR "can inline s1.func1" "func literal does not escape"
136 return foo() // ERROR "inlining call to s1.func1"
139 func switchBreak(x, y int) int { // ERROR "can inline switchBreak"
155 func switchType(x interface{}) int { // ERROR "can inline switchType" "x does not escape"
164 func inlineRangeIntoMe(data []int) { // ERROR "can inline inlineRangeIntoMe" "data does not escape"
165 rangeFunc(data, 12) // ERROR "inlining call to rangeFunc"
168 func rangeFunc(xs []int, b int) int { // ERROR "can inline rangeFunc" "xs does not escape"
169 for i, x := range xs {
179 func (T) meth(int, int) {} // ERROR "can inline T.meth"
181 func k() (T, int, int) { return T{}, 0, 0 } // ERROR "can inline k"
183 func f3() { // ERROR "can inline f3"
184 T.meth(k()) // ERROR "inlining call to k" "inlining call to T.meth"
185 // ERRORAUTO "inlining call to T.meth"
188 func small1() { // ERROR "can inline small1"
191 func small2() int { // ERROR "can inline small2"
192 return runtime.GOMAXPROCS(0)
194 func small3(t T) { // ERROR "can inline small3"
197 func small4(t T) { // not inlineable - has 2 calls.
198 t.meth2(runtime.GOMAXPROCS(0), 5)
200 func (T) meth2(int, int) { // not inlineable - has 2 calls.
205 // Issue #29737 - make sure we can do inlining for a chain of recursive functions
206 func ee() { // ERROR "can inline ee"
207 ff(100) // ERROR "inlining call to ff" "inlining call to gg" "inlining call to hh"
210 func ff(x int) { // ERROR "can inline ff"
216 func gg(x int) { // ERROR "can inline gg"
219 func hh(x int) { // ERROR "can inline hh"
220 ff(x - 1) // ERROR "inlining call to ff" // ERROR "inlining call to gg"
223 // Issue #14768 - make sure we can inline for loops.
224 func for1(fn func() bool) { // ERROR "can inline for1" "fn does not escape"
234 func for2(fn func() bool) { // ERROR "can inline for2" "fn does not escape"
245 // Issue #18493 - make sure we can do inlining of functions with a method value
248 func (a T1) meth(val int) int { // ERROR "can inline T1.meth"
252 func getMeth(t1 T1) func(int) int { // ERROR "can inline getMeth"
253 return t1.meth // ERROR "t1.meth escapes to heap"
254 // ERRORAUTO "inlining call to T1.meth"
257 func ii() { // ERROR "can inline ii"
259 f := getMeth(t1) // ERROR "inlining call to getMeth" "t1.meth does not escape"
263 // Issue #42194 - make sure that functions evaluated in
264 // go and defer statements can be inlined.
266 defer gd1(gd2()) // ERROR "inlining call to gd2"
267 defer gd3()() // ERROR "inlining call to gd3"
268 go gd1(gd2()) // ERROR "inlining call to gd2"
269 go gd3()() // ERROR "inlining call to gd3"
272 func gd2() int { // ERROR "can inline gd2"
276 func gd3() func() { // ERROR "can inline gd3"
280 // Issue #42788 - ensure ODEREF OCONVNOP* OADDR is low cost.
281 func EncodeQuad(d []uint32, x [6]float32) { // ERROR "can inline EncodeQuad" "d does not escape"
283 d[0] = float32bits(x[0]) // ERROR "inlining call to float32bits"
284 d[1] = float32bits(x[1]) // ERROR "inlining call to float32bits"
285 d[2] = float32bits(x[2]) // ERROR "inlining call to float32bits"
286 d[3] = float32bits(x[3]) // ERROR "inlining call to float32bits"
287 d[4] = float32bits(x[4]) // ERROR "inlining call to float32bits"
288 d[5] = float32bits(x[5]) // ERROR "inlining call to float32bits"
291 // float32bits is a copy of math.Float32bits to ensure that
292 // these tests pass with `-gcflags=-l`.
293 func float32bits(f float32) uint32 { // ERROR "can inline float32bits"
294 return *(*uint32)(unsafe.Pointer(&f))
297 // Ensure OCONVNOP is zero cost.
298 func Conv(v uint64) uint64 { // ERROR "can inline Conv"
299 return conv2(conv2(conv2(v))) // ERROR "inlining call to (conv1|conv2)"
301 func conv2(v uint64) uint64 { // ERROR "can inline conv2"
302 return conv1(conv1(conv1(conv1(v)))) // ERROR "inlining call to conv1"
304 func conv1(v uint64) uint64 { // ERROR "can inline conv1"
305 return uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(uint64(v)))))))))))
308 func select1(x, y chan bool) int { // ERROR "can inline select1" "x does not escape" "y does not escape"
317 func select2(x chan bool) { // ERROR "can inline select2" "x does not escape"
318 loop: // test that labeled select can be inlined.
322 case <-time.After(time.Second): // ERROR "inlining call to time.After"
326 func inlineSelect2(x, y chan bool) { // ERROR "x does not escape" "y does not escape"
328 for i := 0; i < 5; i++ {
332 select2(x) // ERROR "inlining call to select2" "inlining call to time.After"