1// errorcheck -0 -m
2
3//go:build !nacl && !386 && !wasm && !arm && !gcflags_noopt
4
5// Copyright 2019 The Go Authors. All rights reserved.
6// Use of this source code is governed by a BSD-style
7// license that can be found in the LICENSE file.
8
9// Test, using compiler diagnostic flags, that inlining of functions
10// imported from the sync package is working.
11// Compiles but does not run.
12
13// FIXME: This test is disabled on architectures where atomic operations
14// are function calls rather than intrinsics, since this prevents inlining
15// of the sync fast paths. This test should be re-enabled once the problem
16// is solved.
17
18package foo
19
20import (
21	"sync"
22)
23
24var mutex *sync.Mutex
25
26func small5() { // ERROR "can inline small5"
27	// the Unlock fast path should be inlined
28	mutex.Unlock() // ERROR "inlining call to sync\.\(\*Mutex\)\.Unlock"
29}
30
31func small6() { // ERROR "can inline small6"
32	// the Lock fast path should be inlined
33	mutex.Lock() // ERROR "inlining call to sync\.\(\*Mutex\)\.Lock"
34}
35
36var once *sync.Once
37
38func small7() { // ERROR "can inline small7"
39	// the Do fast path should be inlined
40	once.Do(small5) // ERROR "inlining call to sync\.\(\*Once\)\.Do" "inlining call to atomic\.\(\*Uint32\)\.Load"
41}
42
43var rwmutex *sync.RWMutex
44
45func small8() { // ERROR "can inline small8"
46	// the RUnlock fast path should be inlined
47	rwmutex.RUnlock() // ERROR "inlining call to sync\.\(\*RWMutex\)\.RUnlock" "inlining call to atomic\.\(\*Int32\)\.Add"
48}
49
50func small9() { // ERROR "can inline small9"
51	// the RLock fast path should be inlined
52	rwmutex.RLock() // ERROR "inlining call to sync\.\(\*RWMutex\)\.RLock" "inlining call to atomic\.\(\*Int32\)\.Add"
53}
54