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// RUN: %clang_cc1 -fsyntax-only -verify %s
int test1(int *a) {
a = __builtin_assume_aligned(a, 32, 0ull);
return a[0];
}
int test2(int *a) {
a = __builtin_assume_aligned(a, 32, 0);
return a[0];
}
int test3(int *a) {
a = __builtin_assume_aligned(a, 32);
return a[0];
}
int test4(int *a) {
a = __builtin_assume_aligned(a, -32); // expected-error {{requested alignment is not a power of 2}}
// FIXME: The line below produces {{requested alignment is not a power of 2}}
// on i386-freebsd, but not on x86_64-linux (for example).
// a = __builtin_assume_aligned(a, 1ULL << 63);
return a[0];
}
int test5(int *a, unsigned *b) {
a = __builtin_assume_aligned(a, 32, b); // expected-warning {{incompatible pointer to integer conversion passing 'unsigned int *' to parameter of type}}
return a[0];
}
int test6(int *a) {
a = __builtin_assume_aligned(a, 32, 0, 0); // expected-error {{too many arguments to function call, expected at most 3, have 4}}
return a[0];
}
int test7(int *a) {
a = __builtin_assume_aligned(a, 31); // expected-error {{requested alignment is not a power of 2}}
return a[0];
}
int test8(int *a, int j) {
a = __builtin_assume_aligned(a, j); // expected-error {{must be a constant integer}}
return a[0];
}
void test_void_assume_aligned(void) __attribute__((assume_aligned(32))); // expected-warning {{'assume_aligned' attribute only applies to return values that are pointers}}
int test_int_assume_aligned(void) __attribute__((assume_aligned(16))); // expected-warning {{'assume_aligned' attribute only applies to return values that are pointers}}
void *test_ptr_assume_aligned(void) __attribute__((assume_aligned(64))); // no-warning
void *test_ptr_assume_aligned(void) __attribute__((assume_aligned(1073741824))); // expected-warning {{requested alignment must be 536870912 bytes or smaller; maximum alignment assumed}}
int j __attribute__((assume_aligned(8))); // expected-warning {{'assume_aligned' attribute only applies to Objective-C methods and functions}}
void *test_no_fn_proto() __attribute__((assume_aligned(32))); // no-warning
void *test_with_fn_proto(void) __attribute__((assume_aligned(128))); // no-warning
void *test_no_fn_proto() __attribute__((assume_aligned(31))); // expected-error {{requested alignment is not a power of 2}}
void *test_no_fn_proto() __attribute__((assume_aligned(32, 73))); // no-warning
void *test_no_fn_proto() __attribute__((assume_aligned)); // expected-error {{'assume_aligned' attribute takes at least 1 argument}}
void *test_no_fn_proto() __attribute__((assume_aligned())); // expected-error {{'assume_aligned' attribute takes at least 1 argument}}
void *test_no_fn_proto() __attribute__((assume_aligned(32, 45, 37))); // expected-error {{'assume_aligned' attribute takes no more than 2 arguments}}
int pr43638(int *a) {
a = __builtin_assume_aligned(a, 1073741824); // expected-warning {{requested alignment must be 536870912 bytes or smaller; maximum alignment assumed}}
return a[0];
}
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