1 // RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-linux-gnu -Wincompatible-pointer-types
2 //
3 // Tests for the pass_object_size attribute
4 // Non-failure cases are covered in test/CodeGen/pass-object-size.c
5 
6 void a(void *p __attribute__((pass_object_size))); //expected-error{{'pass_object_size' attribute takes one argument}}
7 void b(void *p __attribute__((pass_object_size(1.0)))); //expected-error{{'pass_object_size' attribute requires parameter 1 to be an integer constant}}
8 
9 void c(void *p __attribute__((pass_object_size(4)))); //expected-error{{'pass_object_size' attribute requires integer constant between 0 and 3 inclusive}}
10 void d(void *p __attribute__((pass_object_size(-1)))); //expected-error{{'pass_object_size' attribute requires integer constant between 0 and 3 inclusive}}
11 
12 void e(void *p __attribute__((pass_object_size(1ULL<<32)))); //expected-error{{integer constant expression evaluates to value 4294967296 that cannot be represented in a 32-bit unsigned integer type}}
13 
14 void f(char p __attribute__((pass_object_size(0)))); //expected-error{{'pass_object_size' attribute only applies to constant pointer arguments}}
15 void g(const char p __attribute__((pass_object_size(0)))); //expected-error{{'pass_object_size' attribute only applies to constant pointer arguments}}
h(char * p)16 void h(char *p __attribute__((pass_object_size(0)))) {} //expected-error{{pass_object_size attribute only applies to constant pointer arguments}}
17 void i(char *p __attribute__((pass_object_size(0)))); // OK -- const is only necessary on definitions, not decls.
18 void j(char *p __attribute__((pass_object_size(0), pass_object_size(1)))); //expected-error{{'pass_object_size' attribute can only be applied once per parameter}}
19 
20 void k(char *p __attribute__((pass_dynamic_object_size))); // expected-error {{'pass_dynamic_object_size' attribute takes one argument}}
21 void l(int p __attribute__((pass_dynamic_object_size(0)))); // expected-error {{'pass_dynamic_object_size' attribute only applies to constant pointer arguments}}
22 
23 #define PS(N) __attribute__((pass_object_size(N)))
24 #define overloaded __attribute__((overloadable))
25 void Overloaded(void *p PS(0)) overloaded; //expected-note{{previous declaration is here}}
26 void Overloaded(void *p PS(1)) overloaded; //expected-error{{conflicting pass_object_size attributes on parameters}}
27 void Overloaded2(void *p PS(1), void *p2 PS(0)) overloaded; //expected-note{{previous declaration is here}}
28 void Overloaded2(void *p PS(0), void *p2 PS(1)) overloaded; //expected-error{{conflicting pass_object_size attributes on parameters}}
29 
30 void Overloaded3(void *p PS(0), void *p2) overloaded; //expected-note{{previous declaration is here}}
31 void Overloaded3(void *p, void *p2 PS(0)) overloaded; //expected-error{{conflicting pass_object_size attributes on parameters}}
32 
33 void TakeFn(void (*)(void *));
34 void TakeFnOvl(void (*)(void *)) overloaded;
35 void TakeFnOvl(void (*)(int *)) overloaded;
36 
37 void NotOverloaded(void *p PS(0));
38 void IsOverloaded(void *p PS(0)) overloaded; // expected-note 2 {{candidate address cannot be taken because parameter 1 has pass_object_size attribute}}
39 
40 // char* inestead of void* is intentional
41 void IsOverloaded(char *p) overloaded; // expected-note{{passing argument to parameter 'p' here}} expected-note 2 {{type mismatch}}
42 
FunctionPtrs()43 void FunctionPtrs() {
44   void (*p)(void *) = NotOverloaded; //expected-error{{cannot take address of function 'NotOverloaded' because parameter 1 has pass_object_size attribute}}
45   void (*p2)(void *) = &NotOverloaded; //expected-error{{cannot take address of function 'NotOverloaded' because parameter 1 has pass_object_size attribute}}
46 
47   void (*p3)(void *) = IsOverloaded; //expected-warning{{incompatible function pointer types initializing 'void (*)(void *)' with an expression of type '<overloaded function type>'}}
48   void (*p4)(void *) = &IsOverloaded; //expected-warning{{incompatible function pointer types initializing 'void (*)(void *)' with an expression of type '<overloaded function type>'}}
49 
50   void (*p5)(char *) = IsOverloaded;
51   void (*p6)(char *) = &IsOverloaded;
52 
53   TakeFn(NotOverloaded); //expected-error{{cannot take address of function 'NotOverloaded' because parameter 1 has pass_object_size attribute}}
54   TakeFn(&NotOverloaded); //expected-error{{cannot take address of function 'NotOverloaded' because parameter 1 has pass_object_size attribute}}
55 
56   TakeFnOvl(NotOverloaded); //expected-error{{cannot take address of function 'NotOverloaded' because parameter 1 has pass_object_size attribute}}
57   TakeFnOvl(&NotOverloaded); //expected-error{{cannot take address of function 'NotOverloaded' because parameter 1 has pass_object_size attribute}}
58 
59   int P;
60   (&NotOverloaded)(&P); //expected-error{{cannot take address of function 'NotOverloaded' because parameter 1 has pass_object_size attribute}}
61   (&IsOverloaded)(&P); //expected-warning{{incompatible pointer types passing 'int *' to parameter of type 'char *'}}
62 }
63 
64 void mismatch(void *p __attribute__((pass_object_size(0)))); // expected-note {{previous declaration is here}}
65 void mismatch(void *p __attribute__((pass_dynamic_object_size(0)))); // expected-error {{conflicting pass_object_size attributes on parameters}}
66 
67 void mismatch2(void *p __attribute__((pass_dynamic_object_size(0)))); // expected-note {{previous declaration is here}}
68 void mismatch2(void *p __attribute__((pass_dynamic_object_size(1)))); // expected-error {{conflicting pass_object_size attributes on parameters}}
69