clang/test/Sema/alloc-align-attr.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2
   3 // return values
   4 void test_void_alloc_align(void) __attribute__((alloc_align(1))); // expected-warning {{'alloc_align' attribute only applies to return values that are pointers}}
   5 void *test_ptr_alloc_align(unsigned long long a) __attribute__((alloc_align(1))); // no-warning
   6
   7 int j __attribute__((alloc_align(1))); // expected-warning {{'alloc_align' attribute only applies to non-K&R-style functions}}
   8 void *test_no_params_zero(void) __attribute__((alloc_align(0))); // expected-error {{'alloc_align' attribute parameter 1 is out of bounds}}
   9 void *test_no_params(void) __attribute__((alloc_align(1))); // expected-error {{'alloc_align' attribute parameter 1 is out of bounds}}
  10 void *test_incorrect_param_type(float a) __attribute__((alloc_align(1))); // expected-error {{'alloc_align' attribute argument may only refer to a function parameter of integer type}}
  11
  12 // argument type
  13 void *test_bad_param_type(void) __attribute((alloc_align(1.1))); // expected-error {{'alloc_align' attribute requires parameter 1 to be an integer constant}}
  14
  15 // argument count
  16 void *test_no_fn_proto(int x, int y) __attribute__((alloc_align)); // expected-error {{'alloc_align' attribute takes one argument}}
  17 void *test_no_fn_proto(int x, int y) __attribute__((alloc_align())); // expected-error {{'alloc_align' attribute takes one argument}}
  18 void *test_no_fn_proto(int x, int y) __attribute__((alloc_align(32, 45, 37))); // expected-error {{'alloc_align' attribute takes one argument}}
  19
  20 void *passthrought(int a) {
  21   return test_ptr_alloc_align(a);
  22 }
  23 void *align16(void) {
  24   return test_ptr_alloc_align(16);
  25 }
  26 void *align15(void) {
  27   return test_ptr_alloc_align(15); // expected-warning {{requested alignment is not a power of 2}}
  28 }
  29 void *align1073741824(void) {
  30   return test_ptr_alloc_align(8589934592); // expected-warning {{requested alignment must be 4294967296 bytes or smaller; maximum alignment assumed}}
  31 }