llvm-project/clang/test/SemaOpenCL/address-spaces.cl

// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only
// RUN: %clang_cc1 %s -cl-std=CL2.0 -verify -pedantic -fsyntax-only
// RUN: %clang_cc1 %s -cl-std=c++ -verify -pedantic -fsyntax-only

__constant int ci = 1;

__kernel void foo(__global int *gip) {
  __local int li;
  __local int lj = 2; // expected-error {{'__local' variable cannot have an initializer}}

  int *ip;
#if ((!__OPENCL_CPP_VERSION__) && (__OPENCL_C_VERSION__ < 200))
  ip = gip; // expected-error {{assigning '__global int *' to 'int *' changes address space of pointer}}
  ip = &li; // expected-error {{assigning '__local int *' to 'int *' changes address space of pointer}}
  ip = &ci; // expected-error {{assigning '__constant int *' to 'int *' changes address space of pointer}}
#else
  ip = gip;
  ip = &li;
  ip = &ci;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{assigning '__constant int *' to '__generic int *' changes address space of pointer}}
#else
// expected-error@-4 {{assigning to '__generic int *' from incompatible type '__constant int *'}}
#endif
#endif
}

void explicit_cast(__global int *g, __local int *l, __constant int *c, __private int *p, const __constant int *cc) {
  g = (__global int *)l;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting '__local int *' to type '__global int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from '__local int *' to '__global int *' converts between mismatching address spaces}}
#endif
  g = (__global int *)c;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting '__constant int *' to type '__global int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from '__constant int *' to '__global int *' converts between mismatching address spaces}}
#endif
  g = (__global int *)cc;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting 'const __constant int *' to type '__global int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from 'const __constant int *' to '__global int *' converts between mismatching address spaces}}
#endif
  g = (__global int *)p;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting 'int *' to type '__global int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from 'int *' to '__global int *' converts between mismatching address spaces}}
#endif
  l = (__local int *)g;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting '__global int *' to type '__local int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from '__global int *' to '__local int *' converts between mismatching address spaces}}
#endif
  l = (__local int *)c;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting '__constant int *' to type '__local int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from '__constant int *' to '__local int *' converts between mismatching address spaces}}
#endif
  l = (__local int *)cc;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting 'const __constant int *' to type '__local int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from 'const __constant int *' to '__local int *' converts between mismatching address spaces}}
#endif
  l = (__local int *)p;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting 'int *' to type '__local int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from 'int *' to '__local int *' converts between mismatching address spaces}}
#endif
  c = (__constant int *)g;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting '__global int *' to type '__constant int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from '__global int *' to '__constant int *' converts between mismatching address spaces}}
#endif
  c = (__constant int *)l;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting '__local int *' to type '__constant int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from '__local int *' to '__constant int *' converts between mismatching address spaces}}
#endif
  c = (__constant int *)p;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting 'int *' to type '__constant int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from 'int *' to '__constant int *' converts between mismatching address spaces}}
#endif
  p = (__private int *)g;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting '__global int *' to type 'int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from '__global int *' to 'int *' converts between mismatching address spaces}}
#endif
  p = (__private int *)l;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting '__local int *' to type 'int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from '__local int *' to 'int *' converts between mismatching address spaces}}
#endif
  p = (__private int *)c;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting '__constant int *' to type 'int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from '__constant int *' to 'int *' converts between mismatching address spaces}}
#endif
  p = (__private int *)cc;
#if !__OPENCL_CPP_VERSION__
// expected-error@-2 {{casting 'const __constant int *' to type 'int *' changes address space of pointer}}
#else
// expected-error@-4 {{C-style cast from 'const __constant int *' to 'int *' converts between mismatching address spaces}}
#endif
}

void ok_explicit_casts(__global int *g, __global int *g2, __local int *l, __local int *l2, __private int *p, __private int *p2) {
  g = (__global int *)g2;
  l = (__local int *)l2;
  p = (__private int *)p2;
}

#if !__OPENCL_CPP_VERSION__
void nested(__global int *g, __global int * __private *gg, __local int *l, __local int * __private *ll, __global float * __private *gg_f) {
  g = gg;    // expected-error {{assigning '__global int **' to '__global int *' changes address space of pointer}}
  g = l;     // expected-error {{assigning '__local int *' to '__global int *' changes address space of pointer}}
  g = ll;    // expected-error {{assigning '__local int **' to '__global int *' changes address space of pointer}}
  g = gg_f;  // expected-error {{assigning '__global float **' to '__global int *' changes address space of pointer}}
  g = (__global int *)gg_f; // expected-error {{casting '__global float **' to type '__global int *' changes address space of pointer}}

  gg = g;    // expected-error {{assigning '__global int *' to '__global int **' changes address space of pointer}}
  gg = l;    // expected-error {{assigning '__local int *' to '__global int **' changes address space of pointer}}
  gg = ll;   // expected-error {{assigning '__local int **' to '__global int **' changes address space of nested pointer}}
  gg = gg_f; // expected-warning {{incompatible pointer types assigning to '__global int **' from '__global float **'}}
  gg = (__global int * __private *)gg_f;

  l = g;     // expected-error {{assigning '__global int *' to '__local int *' changes address space of pointer}}
  l = gg;    // expected-error {{assigning '__global int **' to '__local int *' changes address space of pointer}}
  l = ll;    // expected-error {{assigning '__local int **' to '__local int *' changes address space of pointer}}
  l = gg_f;  // expected-error {{assigning '__global float **' to '__local int *' changes address space of pointer}}
  l = (__local int *)gg_f; // expected-error {{casting '__global float **' to type '__local int *' changes address space of pointer}}

  ll = g;    // expected-error {{assigning '__global int *' to '__local int **' changes address space of pointer}}
  ll = gg;   // expected-error {{assigning '__global int **' to '__local int **' changes address space of nested pointer}}
  ll = l;    // expected-error {{assigning '__local int *' to '__local int **' changes address space of pointer}}
  ll = gg_f; // expected-error {{assigning '__global float **' to '__local int **' changes address space of nested pointer}}
  ll = (__local int * __private *)gg_f; // expected-warning {{casting '__global float **' to type '__local int **' discards qualifiers in nested pointer types}}

  gg_f = g;  // expected-error {{assigning '__global int *' to '__global float **' changes address space of pointer}}
  gg_f = gg; // expected-warning {{incompatible pointer types assigning to '__global float **' from '__global int **'}}
  gg_f = l;  // expected-error {{assigning '__local int *' to '__global float **' changes address space of pointer}}
  gg_f = ll; // expected-error {{assigning '__local int **' to '__global float **' changes address space of nested pointer}}
  gg_f = (__global float * __private *)gg;

  // FIXME: This doesn't seem right. This should be an error, not a warning.
  __local int * __global * __private * lll;
  lll = gg; // expected-warning {{incompatible pointer types assigning to '__local int *__global **' from '__global int **'}}

  typedef __local int * l_t;
  typedef __global int * g_t;
  __private l_t * pl;
  __private g_t * pg;
  gg = pl;  // expected-error {{assigning 'l_t *' (aka '__local int **') to '__global int **' changes address space of nested pointer}}
  pl = gg;  // expected-error {{assigning '__global int **' to 'l_t *' (aka '__local int **') changes address space of nested pointer}}
  gg = pg;
  pg = gg;
  pg = pl;  // expected-error {{assigning 'l_t *' (aka '__local int **') to 'g_t *' (aka '__global int **') changes address space of nested pointer}}
  pl = pg;  // expected-error {{assigning 'g_t *' (aka '__global int **') to 'l_t *' (aka '__local int **') changes address space of nested pointer}}

  ll = (__local int * __private *)(void *)gg;
  void *vp = ll;
}
#else
void nested(__global int *g, __global int * __private *gg, __local int *l, __local int * __private *ll, __global float * __private *gg_f) {
  g = gg;    // expected-error {{assigning to '__global int *' from incompatible type '__global int **'}}
  g = l;     // expected-error {{assigning to '__global int *' from incompatible type '__local int *'}}
  g = ll;    // expected-error {{assigning to '__global int *' from incompatible type '__local int **'}}
  g = gg_f;  // expected-error {{assigning to '__global int *' from incompatible type '__global float **'}}
  g = (__global int *)gg_f; // expected-error {{C-style cast from '__global float **' to '__global int *' converts between mismatching address spaces}}

  gg = g;    // expected-error {{assigning to '__global int **' from incompatible type '__global int *'; take the address with &}}
  gg = l;    // expected-error {{assigning to '__global int **' from incompatible type '__local int *'}}
  gg = ll;   // expected-error {{assigning to '__global int **' from incompatible type '__local int **'}}
  gg = gg_f; // expected-error {{assigning to '__global int **' from incompatible type '__global float **'}}
  gg = (__global int * __private *)gg_f;

  l = g;     // expected-error {{assigning to '__local int *' from incompatible type '__global int *'}}
  l = gg;    // expected-error {{assigning to '__local int *' from incompatible type '__global int **'}}
  l = ll;    // expected-error {{assigning to '__local int *' from incompatible type '__local int **'}}
  l = gg_f;  // expected-error {{assigning to '__local int *' from incompatible type '__global float **'}}
  l = (__local int *)gg_f; // expected-error {{C-style cast from '__global float **' to '__local int *' converts between mismatching address spaces}}

  ll = g;    // expected-error {{assigning to '__local int **' from incompatible type '__global int *'}}
  ll = gg;   // expected-error {{assigning to '__local int **' from incompatible type '__global int **'}}
  ll = l;    // expected-error {{assigning to '__local int **' from incompatible type '__local int *'; take the address with &}}
  ll = gg_f; // expected-error {{assigning to '__local int **' from incompatible type '__global float **'}}
  // FIXME: The below becomes a reinterpret_cast, and therefore does not emit an error
  // even though the address space mismatches in the nested pointers.
  ll = (__local int * __private *)gg;

  gg_f = g;  // expected-error {{assigning to '__global float **' from incompatible type '__global int *'}}
  gg_f = gg; // expected-error {{assigning to '__global float **' from incompatible type '__global int **'}}
  gg_f = l;  // expected-error {{assigning to '__global float **' from incompatible type '__local int *'}}
  gg_f = ll; // expected-error {{assigning to '__global float **' from incompatible type '__local int **'}}
  gg_f = (__global float * __private *)gg;

  typedef __local int * l_t;
  typedef __global int * g_t;
  __private l_t * pl;
  __private g_t * pg;
  gg = pl;  // expected-error {{assigning to '__global int **' from incompatible type 'l_t *' (aka '__local int **')}}
  pl = gg;  // expected-error {{assigning to 'l_t *' (aka '__local int **') from incompatible type '__global int **'}}
  gg = pg;
  pg = gg;
  pg = pl;  // expected-error {{assigning to 'g_t *' (aka '__global int **') from incompatible type 'l_t *' (aka '__local int **')}}
  pl = pg;  // expected-error {{assigning to 'l_t *' (aka '__local int **') from incompatible type 'g_t *' (aka '__global int **')}}

  ll = (__local int * __private *)(void *)gg;
  void *vp = ll;
}
#endif

__private int func_return_priv(void);       //expected-error {{return value cannot be qualified with address space}}
__global int func_return_global(void);      //expected-error {{return value cannot be qualified with address space}}
__local int func_return_local(void);        //expected-error {{return value cannot be qualified with address space}}
__constant int func_return_constant(void);  //expected-error {{return value cannot be qualified with address space}}
#if __OPENCL_C_VERSION__ >= 200
__generic int func_return_generic(void);    //expected-error {{return value cannot be qualified with address space}}
#endif

void func_multiple_addr(void) {
  typedef __private int private_int_t;
  __private __local int var1;   // expected-error {{multiple address spaces specified for type}}
  __private __local int *var2;  // expected-error {{multiple address spaces specified for type}}
  __local private_int_t var3;   // expected-error {{multiple address spaces specified for type}}
  __local private_int_t *var4;  // expected-error {{multiple address spaces specified for type}}
  __private private_int_t var5; // expected-warning {{multiple identical address spaces specified for type}}
  __private private_int_t *var6;// expected-warning {{multiple identical address spaces specified for type}}
}