1 // RUN: %clang_cc1 -fsyntax-only -verify %s 2 3 int test1(int *a) { 4 a = __builtin_assume_aligned(a, 32, 0ull); 5 return a[0]; 6 } 7 8 int test2(int *a) { 9 a = __builtin_assume_aligned(a, 32, 0); 10 return a[0]; 11 } 12 13 int test3(int *a) { 14 a = __builtin_assume_aligned(a, 32); 15 return a[0]; 16 } 17 18 int test4(int *a) { 19 a = __builtin_assume_aligned(a, -32); // expected-error {{requested alignment is not a power of 2}} 20 // FIXME: The line below produces {{requested alignment is not a power of 2}} 21 // on i386-freebsd, but not on x86_64-linux (for example). 22 // a = __builtin_assume_aligned(a, 1ULL << 63); 23 return a[0]; 24 } 25 26 int test5(int *a, unsigned *b) { 27 a = __builtin_assume_aligned(a, 32, b); // expected-warning {{incompatible pointer to integer conversion passing 'unsigned int *' to parameter of type}} 28 return a[0]; 29 } 30 31 int test6(int *a) { 32 a = __builtin_assume_aligned(a, 32, 0, 0); // expected-error {{too many arguments to function call, expected at most 3, have 4}} 33 return a[0]; 34 } 35 36 int test7(int *a) { 37 a = __builtin_assume_aligned(a, 31); // expected-error {{requested alignment is not a power of 2}} 38 return a[0]; 39 } 40 41 int test8(int *a, int j) { 42 a = __builtin_assume_aligned(a, j); // expected-error {{must be a constant integer}} 43 return a[0]; 44 } 45 46 void test_void_assume_aligned(void) __attribute__((assume_aligned(32))); // expected-warning {{'assume_aligned' attribute only applies to return values that are pointers}} 47 int test_int_assume_aligned(void) __attribute__((assume_aligned(16))); // expected-warning {{'assume_aligned' attribute only applies to return values that are pointers}} 48 void *test_ptr_assume_aligned(void) __attribute__((assume_aligned(64))); // no-warning 49 50 int j __attribute__((assume_aligned(8))); // expected-warning {{'assume_aligned' attribute only applies to functions and methods}} 51 void *test_no_fn_proto() __attribute__((assume_aligned(32))); // no-warning 52 void *test_with_fn_proto(void) __attribute__((assume_aligned(128))); // no-warning 53 54 void *test_no_fn_proto() __attribute__((assume_aligned(31))); // expected-error {{requested alignment is not a power of 2}} 55 void *test_no_fn_proto() __attribute__((assume_aligned(32, 73))); // no-warning 56 57 void *test_no_fn_proto() __attribute__((assume_aligned)); // expected-error {{'assume_aligned' attribute takes at least 1 argument}} 58 void *test_no_fn_proto() __attribute__((assume_aligned())); // expected-error {{'assume_aligned' attribute takes at least 1 argument}} 59 void *test_no_fn_proto() __attribute__((assume_aligned(32, 45, 37))); // expected-error {{'assume_aligned' attribute takes no more than 2 arguments}} 60 61
