| 1 | // RUN: %clang_cc1 -fsyntax-only -verify %s -Wincompatible-pointer-types |
| 2 | |
| 3 | int var __attribute__((overloadable)); // expected-error{{'overloadable' attribute only applies to functions}} |
| 4 | void params(void) __attribute__((overloadable(12))); // expected-error {{'overloadable' attribute takes no arguments}} |
| 5 | |
| 6 | int *f(int) __attribute__((overloadable)); // expected-note{{previous overload of function is here}} |
| 7 | float *f(float); |
| 8 | int *f(int); // expected-error{{redeclaration of 'f' must have the 'overloadable' attribute}} \ |
| 9 | // expected-note{{previous declaration is here}} |
| 10 | double *f(double) __attribute__((overloadable)); // okay, new |
| 11 | |
| 12 | // Ensure we don't complain about overloadable on implicitly declared functions. |
| 13 | int isdigit(int) __attribute__((overloadable)); |
| 14 | |
| 15 | void test_f(int iv, float fv, double dv) { |
| 16 | int *ip = f(iv); |
| 17 | float *fp = f(fv); |
| 18 | double *dp = f(dv); |
| 19 | } |
| 20 | |
| 21 | int *accept_funcptr(int (*)()) __attribute__((overloadable)); // \ |
| 22 | // expected-note{{candidate function}} |
| 23 | float *accept_funcptr(int (*)(int, double)) __attribute__((overloadable)); // \ |
| 24 | // expected-note{{candidate function}} |
| 25 | |
| 26 | void test_funcptr(int (*f1)(int, double), |
| 27 | int (*f2)(int, float)) { |
| 28 | float *fp = accept_funcptr(f1); |
| 29 | accept_funcptr(f2); // expected-error{{call to 'accept_funcptr' is ambiguous}} |
| 30 | } |
| 31 | |
| 32 | struct X { int x; float y; }; |
| 33 | struct Y { int x; float y; }; |
| 34 | int* accept_struct(struct X x) __attribute__((__overloadable__)); |
| 35 | float* accept_struct(struct Y y) __attribute__((overloadable)); |
| 36 | |
| 37 | void test_struct(struct X x, struct Y y) { |
| 38 | int *ip = accept_struct(x); |
| 39 | float *fp = accept_struct(y); |
| 40 | } |
| 41 | |
| 42 | double *f(int) __attribute__((overloadable)); // expected-error{{conflicting types for 'f'}} |
| 43 | |
| 44 | double promote(float) __attribute__((__overloadable__)); |
| 45 | double promote(double) __attribute__((__overloadable__)); |
| 46 | long double promote(long double) __attribute__((__overloadable__)); |
| 47 | |
| 48 | void promote(...) __attribute__((__overloadable__, __unavailable__)); // expected-note {{marked unavailable here}} |
| 49 | |
| 50 | void test_promote(short* sp) { |
| 51 | promote(1.0); |
| 52 | promote(sp); // expected-error{{'promote' is unavailable}} |
| 53 | } |
| 54 | |
| 55 | // PR6600 |
| 56 | typedef double Double; |
| 57 | typedef Double DoubleVec __attribute__((vector_size(16))); |
| 58 | typedef int Int; |
| 59 | typedef Int IntVec __attribute__((vector_size(16))); |
| 60 | double magnitude(DoubleVec) __attribute__((__overloadable__)); |
| 61 | double magnitude(IntVec) __attribute__((__overloadable__)); |
| 62 | double test_p6600(DoubleVec d) { |
| 63 | return magnitude(d) * magnitude(d); |
| 64 | } |
| 65 | |
| 66 | // PR7738 |
| 67 | extern int __attribute__((overloadable)) f0(); // expected-error{{'overloadable' function 'f0' must have a prototype}} |
| 68 | typedef int f1_type(); |
| 69 | f1_type __attribute__((overloadable)) f1; // expected-error{{'overloadable' function 'f1' must have a prototype}} |
| 70 | |
| 71 | void test() { |
| 72 | f0(); |
| 73 | f1(); |
| 74 | } |
| 75 | |
| 76 | void before_local_1(int) __attribute__((overloadable)); |
| 77 | void before_local_2(int); // expected-note {{here}} |
| 78 | void before_local_3(int) __attribute__((overloadable)); |
| 79 | void local() { |
| 80 | void before_local_1(char); |
| 81 | void before_local_2(char); // expected-error {{conflicting types}} |
| 82 | void before_local_3(char) __attribute__((overloadable)); |
| 83 | void after_local_1(char); |
| 84 | void after_local_2(char) __attribute__((overloadable)); |
| 85 | void after_local_3(char) __attribute__((overloadable)); |
| 86 | } |
| 87 | void after_local_1(int) __attribute__((overloadable)); |
| 88 | void after_local_2(int); |
| 89 | void after_local_3(int) __attribute__((overloadable)); |
| 90 | |
| 91 | // Make sure we allow C-specific conversions in C. |
| 92 | void conversions() { |
| 93 | void foo(char *c) __attribute__((overloadable)); |
| 94 | void foo(char *c) __attribute__((overloadable, enable_if(c, "nope.jpg"))); |
| 95 | |
| 96 | void *ptr; |
| 97 | foo(ptr); |
| 98 | |
| 99 | void multi_type(unsigned char *c) __attribute__((overloadable)); |
| 100 | void multi_type(signed char *c) __attribute__((overloadable)); |
| 101 | unsigned char *c; |
| 102 | multi_type(c); |
| 103 | } |
| 104 | |
| 105 | // Ensure that we allow C-specific type conversions in C |
| 106 | void fn_type_conversions() { |
| 107 | void foo(void *c) __attribute__((overloadable)); |
| 108 | void foo(char *c) __attribute__((overloadable)); |
| 109 | void (*ptr1)(void *) = &foo; |
| 110 | void (*ptr2)(char *) = &foo; |
| 111 | void (*ambiguous)(int *) = &foo; // expected-error{{initializing 'void (*)(int *)' with an expression of incompatible type '<overloaded function type>'}} expected-note@-4{{candidate function}} expected-note@-3{{candidate function}} |
| 112 | void *vp_ambiguous = &foo; // expected-error{{initializing 'void *' with an expression of incompatible type '<overloaded function type>'}} expected-note@-5{{candidate function}} expected-note@-4{{candidate function}} |
| 113 | |
| 114 | void (*specific1)(int *) = (void (*)(void *))&foo; // expected-warning{{incompatible function pointer types initializing 'void (*)(int *)' with an expression of type 'void (*)(void *)'}} |
| 115 | void *specific2 = (void (*)(void *))&foo; |
| 116 | |
| 117 | void disabled(void *c) __attribute__((overloadable, enable_if(0, ""))); |
| 118 | void disabled(int *c) __attribute__((overloadable, enable_if(c, ""))); |
| 119 | void disabled(char *c) __attribute__((overloadable, enable_if(1, "The function name lies."))); |
| 120 | // To be clear, these should all point to the last overload of 'disabled' |
| 121 | void (*dptr1)(char *c) = &disabled; |
| 122 | void (*dptr2)(void *c) = &disabled; // expected-warning{{incompatible pointer types initializing 'void (*)(void *)' with an expression of type '<overloaded function type>'}} expected-note@-5{{candidate function made ineligible by enable_if}} expected-note@-4{{candidate function made ineligible by enable_if}} expected-note@-3{{candidate function has type mismatch at 1st parameter (expected 'void *' but has 'char *')}} |
| 123 | void (*dptr3)(int *c) = &disabled; // expected-warning{{incompatible pointer types initializing 'void (*)(int *)' with an expression of type '<overloaded function type>'}} expected-note@-6{{candidate function made ineligible by enable_if}} expected-note@-5{{candidate function made ineligible by enable_if}} expected-note@-4{{candidate function has type mismatch at 1st parameter (expected 'int *' but has 'char *')}} |
| 124 | |
| 125 | void *specific_disabled = &disabled; |
| 126 | } |
| 127 | |
| 128 | void incompatible_pointer_type_conversions() { |
| 129 | char charbuf[1]; |
| 130 | unsigned char ucharbuf[1]; |
| 131 | int intbuf[1]; |
| 132 | |
| 133 | void foo(char *c) __attribute__((overloadable)); |
| 134 | void foo(short *c) __attribute__((overloadable)); |
| 135 | foo(charbuf); |
| 136 | foo(ucharbuf); // expected-error{{call to 'foo' is ambiguous}} expected-note@-3{{candidate function}} expected-note@-2{{candidate function}} |
| 137 | foo(intbuf); // expected-error{{call to 'foo' is ambiguous}} expected-note@-4{{candidate function}} expected-note@-3{{candidate function}} |
| 138 | |
| 139 | void bar(unsigned char *c) __attribute__((overloadable)); |
| 140 | void bar(signed char *c) __attribute__((overloadable)); |
| 141 | bar(charbuf); // expected-error{{call to 'bar' is ambiguous}} expected-note@-2{{candidate function}} expected-note@-1{{candidate function}} |
| 142 | bar(ucharbuf); |
| 143 | bar(intbuf); // expected-error{{call to 'bar' is ambiguous}} expected-note@-4{{candidate function}} expected-note@-3{{candidate function}} |
| 144 | } |
| 145 | |
| 146 | void dropping_qualifiers_is_incompatible() { |
| 147 | const char ccharbuf[1]; |
| 148 | volatile char vcharbuf[1]; |
| 149 | |
| 150 | void foo(char *c) __attribute__((overloadable)); |
| 151 | void foo(const volatile unsigned char *c) __attribute__((overloadable)); |
| 152 | |
| 153 | foo(ccharbuf); // expected-error{{call to 'foo' is ambiguous}} expected-note@-3{{candidate function}} expected-note@-2{{candidate function}} |
| 154 | foo(vcharbuf); // expected-error{{call to 'foo' is ambiguous}} expected-note@-4{{candidate function}} expected-note@-3{{candidate function}} |
| 155 | } |
| 156 | |
| 157 | void overloadable_with_global() { |
| 158 | void wg_foo(void) __attribute__((overloadable)); // expected-note{{previous}} |
| 159 | void wg_foo(int) __attribute__((overloadable)); |
| 160 | } |
| 161 | |
| 162 | int wg_foo; // expected-error{{redefinition of 'wg_foo' as different kind of symbol}} |
| 163 | |
| 164 | #if !__has_extension(overloadable_unmarked) |
| 165 | #error "We should have unmarked overload support" |
| 166 | #endif |
| 167 | |
| 168 | void to_foo0(int); |
| 169 | void to_foo0(double) __attribute__((overloadable)); // expected-note{{previous overload}} |
| 170 | void to_foo0(int); |
| 171 | void to_foo0(double); // expected-error{{must have the 'overloadable' attribute}} |
| 172 | void to_foo0(int); |
| 173 | |
| 174 | void to_foo1(int) __attribute__((overloadable)); // expected-note 2{{previous overload}} |
| 175 | void to_foo1(double); |
| 176 | void to_foo1(int); // expected-error{{must have the 'overloadable' attribute}} |
| 177 | void to_foo1(double); |
| 178 | void to_foo1(int); // expected-error{{must have the 'overloadable' attribute}} |
| 179 | |
| 180 | void to_foo2(int); // expected-note{{previous unmarked overload}} |
| 181 | void to_foo2(double) __attribute__((overloadable)); // expected-note 2{{previous overload}} |
| 182 | void to_foo2(int) __attribute__((overloadable)); // expected-error {{must not have the 'overloadable' attribute}} |
| 183 | void to_foo2(double); // expected-error{{must have the 'overloadable' attribute}} |
| 184 | void to_foo2(int); |
| 185 | void to_foo2(double); // expected-error{{must have the 'overloadable' attribute}} |
| 186 | void to_foo2(int); |
| 187 | |
| 188 | void to_foo3(int); |
| 189 | void to_foo3(double) __attribute__((overloadable)); // expected-note{{previous overload}} |
| 190 | void to_foo3(int); |
| 191 | void to_foo3(double); // expected-error{{must have the 'overloadable' attribute}} |
| 192 | |
| 193 | void to_foo4(int) __attribute__((overloadable)); // expected-note{{previous overload}} |
| 194 | void to_foo4(int); // expected-error{{must have the 'overloadable' attribute}} |
| 195 | void to_foo4(double) __attribute__((overloadable)); |
| 196 | |
| 197 | void to_foo5(int); |
| 198 | void to_foo5(int); // expected-note 3{{previous unmarked overload}} |
| 199 | void to_foo5(float) __attribute__((overloadable)); |
| 200 | void to_foo5(double); // expected-error{{at most one overload for a given name may lack the 'overloadable' attribute}} |
| 201 | void to_foo5(float) __attribute__((overloadable)); |
| 202 | void to_foo5(short); // expected-error{{at most one overload for a given name may lack the 'overloadable' attribute}} |
| 203 | void to_foo5(long); // expected-error{{at most one overload for a given name may lack the 'overloadable' attribute}} |
| 204 | void to_foo5(double) __attribute__((overloadable)); |
| 205 | |
| 206 | void to_foo6(int) __attribute__((enable_if(1, ""), overloadable)); // expected-note{{previous overload}} |
| 207 | void to_foo6(int) __attribute__((enable_if(1, ""))); // expected-error{{must have the 'overloadable' attribute}} |
| 208 | void to_foo6(int) __attribute__((enable_if(1, ""), overloadable)); |
| 209 | |
| 210 | void to_foo7(int) __attribute__((enable_if(1, ""))); // expected-note{{previous unmarked overload}} |
| 211 | void to_foo7(int) __attribute__((enable_if(1, ""), overloadable)); // expected-error{{must not have the 'overloadable' attribute}} |
| 212 | void to_foo7(int) __attribute__((enable_if(1, ""))); |
| 213 | |
| 214 | void to_foo8(char *__attribute__((pass_object_size(0)))) |
| 215 | __attribute__((enable_if(1, ""))); |
| 216 | void to_foo8(char *__attribute__((pass_object_size(0)))) |
| 217 | __attribute__((overloadable)); |
| 218 | |
| 219 | void to_foo9(int); // expected-note{{previous unmarked overload}} |
| 220 | // FIXME: It would be nice if we did better with the "previous unmarked |
| 221 | // overload" diag. |
| 222 | void to_foo9(int) __attribute__((overloadable)); // expected-error{{must not have the 'overloadable' attribute}} expected-note{{previous declaration}} expected-note{{previous unmarked overload}} |
| 223 | void to_foo9(float); // expected-error{{conflicting types for 'to_foo9'}} |
| 224 | void to_foo9(float) __attribute__((overloadable)); |
| 225 | void to_foo9(double); // expected-error{{at most one overload for a given name may lack the 'overloadable' attribute}} |
| 226 | void to_foo9(double) __attribute__((overloadable)); |
| 227 | |
| 228 | void to_foo10(int) __attribute__((overloadable)); |
| 229 | void to_foo10(double); // expected-note{{previous unmarked overload}} |
| 230 | // no "note: previous redecl" if no previous decl has `overloadable` |
| 231 | // spelled out |
| 232 | void to_foo10(float); // expected-error{{at most one overload for a given name may lack the 'overloadable' attribute}} |
| 233 | void to_foo10(float); // expected-error{{must have the 'overloadable' attribute}} |
| 234 | void to_foo10(float); // expected-error{{must have the 'overloadable' attribute}} |
| 235 | |
| 236 | // Bug: we used to treat `__typeof__(foo)` as though it was `__typeof__(&foo)` |
| 237 | // if `foo` was overloaded with only one function that could have its address |
| 238 | // taken. |
| 239 | void typeof_function_is_not_a_pointer() { |
| 240 | void not_a_pointer(void *) __attribute__((overloadable)); |
| 241 | void not_a_pointer(char *__attribute__((pass_object_size(1)))) |
| 242 | __attribute__((overloadable)); |
| 243 | |
| 244 | __typeof__(not_a_pointer) *fn; |
| 245 | |
| 246 | void take_fn(void (*)(void *)); |
| 247 | // if take_fn is passed a void (**)(void *), we'll get a warning. |
| 248 | take_fn(fn); |
| 249 | } |
| 250 | |