1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2
3 #if defined(INCLUDE)
4 // -------
5 // This section acts like a header file.
6 // -------
7
8 // Check the use of static variables in non-static inline functions.
9 static int staticVar; // expected-note + {{'staticVar' declared here}}
10 static int staticFunction(); // expected-note + {{'staticFunction' declared here}}
11 static struct { int x; } staticStruct; // expected-note + {{'staticStruct' declared here}}
12
useStatic()13 inline int useStatic () { // expected-note 3 {{use 'static' to give inline function 'useStatic' internal linkage}}
14 staticFunction(); // expected-warning{{static function 'staticFunction' is used in an inline function with external linkage}}
15 (void)staticStruct.x; // expected-warning{{static variable 'staticStruct' is used in an inline function with external linkage}}
16 return staticVar; // expected-warning{{static variable 'staticVar' is used in an inline function with external linkage}}
17 }
18
useStaticFromExtern()19 extern inline int useStaticFromExtern () { // no suggestions
20 staticFunction(); // expected-warning{{static function 'staticFunction' is used in an inline function with external linkage}}
21 return staticVar; // expected-warning{{static variable 'staticVar' is used in an inline function with external linkage}}
22 }
23
useStaticFromStatic()24 static inline int useStaticFromStatic () {
25 staticFunction(); // no-warning
26 return staticVar; // no-warning
27 }
28
useStaticInlineFromExtern()29 extern inline int useStaticInlineFromExtern () {
30 // Heuristic: if the function we're using is also inline, don't warn.
31 // This can still be wrong (in this case, we end up inlining calls to
32 // staticFunction and staticVar) but this got very noisy even using
33 // standard headers.
34 return useStaticFromStatic(); // no-warning
35 }
36
37 static int constFunction() __attribute__((const));
38
useConst()39 inline int useConst () {
40 return constFunction(); // no-warning
41 }
42
43 #else
44 // -------
45 // This is the main source file.
46 // -------
47
48 #define INCLUDE
49 #include "inline.c"
50
51 // Check that we don't allow illegal uses of inline
52 inline int a; // expected-error{{'inline' can only appear on functions}}
53 typedef inline int b; // expected-error{{'inline' can only appear on functions}}
54 int d(inline int a); // expected-error{{'inline' can only appear on functions}}
55
56 // Check that the warnings from the "header file" aren't on by default in
57 // the main source file.
58
useStaticMainFile()59 inline int useStaticMainFile () {
60 staticFunction(); // no-warning
61 return staticVar; // no-warning
62 }
63
64 // Check that the warnings show up when explicitly requested.
65
66 #pragma clang diagnostic push
67 #pragma clang diagnostic warning "-Wstatic-in-inline"
68
useStaticAgain()69 inline int useStaticAgain () { // expected-note 2 {{use 'static' to give inline function 'useStaticAgain' internal linkage}}
70 staticFunction(); // expected-warning{{static function 'staticFunction' is used in an inline function with external linkage}}
71 return staticVar; // expected-warning{{static variable 'staticVar' is used in an inline function with external linkage}}
72 }
73
74 #pragma clang diagnostic pop
75
76 #endif
77
78
79