llvm-project/clang/test/Sema/address_spaces.c

// RUN: clang %s -fsyntax-only -verify

#define _AS1 __attribute__((address_space(1)))
#define _AS2 __attribute__((address_space(2)))
#define _AS3 __attribute__((address_space(3)))

void foo(_AS3 float *a) {
  _AS2 *x;
  _AS1 float * _AS2 *B;

  int _AS1 _AS2 *Y;   // expected-error {{multiple address spaces specified for type}}
  int *_AS1 _AS2 *Z;  // expected-error {{multiple address spaces specified for type}}

  _AS1 int local;     // expected-error {{automatic variable qualified with an address space}}
  _AS1 int array[5];  // expected-error {{automatic variable qualified with an address space}}
  _AS1 int arrarr[5][5]; // expected-error {{automatic variable qualified with an address space}}

  *a = 5.0f;
}