clang/test/SemaCXX/amdgpu-barrier.cpp

// REQUIRES: amdgpu-registered-target
// RUN: %clang_cc1 -fsyntax-only -verify -std=gnu++11 -triple amdgpu -Wno-unused-value %s

void foo() {
  int n = 100;
  __amdgpu_named_workgroup_barrier_t v = 0; // expected-error {{cannot initialize a variable of type '__amdgpu_named_workgroup_barrier_t' with an rvalue of type 'int'}}
  static_cast<__amdgpu_named_workgroup_barrier_t>(n); // expected-error {{static_cast from 'int' to '__amdgpu_named_workgroup_barrier_t' is not allowed}}
  dynamic_cast<__amdgpu_named_workgroup_barrier_t>(n); // expected-error {{invalid target type '__amdgpu_named_workgroup_barrier_t' for dynamic_cast; target type must be a reference or pointer type to a defined class}}
  reinterpret_cast<__amdgpu_named_workgroup_barrier_t>(n); // expected-error {{reinterpret_cast from 'int' to '__amdgpu_named_workgroup_barrier_t' is not allowed}}
  int c(v); // expected-error {{cannot initialize a variable of type 'int' with an lvalue of type '__amdgpu_named_workgroup_barrier_t'}}
  __amdgpu_named_workgroup_barrier_t k;
  int *ip = (int *)k; // expected-error {{cannot cast from type '__amdgpu_named_workgroup_barrier_t' to pointer type 'int *'}}
  void *vp = (void *)k; // expected-error {{cannot cast from type '__amdgpu_named_workgroup_barrier_t' to pointer type 'void *'}}
}

using SugaredArray = __amdgpu_named_workgroup_barrier_t[2];

struct TestSimple {
  __amdgpu_named_workgroup_barrier_t x;
};

struct TestArray{
  __amdgpu_named_workgroup_barrier_t y[2];
};

struct TestSugared {
  SugaredArray z[2];
};

struct TestSimpleWithStaticField {
  __amdgpu_named_workgroup_barrier_t x;
  static unsigned Harmless;
};

// Wrappers cannot have >1 field.
struct WrapperHasTooManyFields {  // expected-note {{'WrapperHasTooManyFields' is not a named barrier wrapper because it has more than one field}}
  __amdgpu_named_workgroup_barrier_t x; // expected-error {{field with barrier type '__amdgpu_named_workgroup_barrier_t' seen in a structure that is not a named barrier wrapper}}
  int other;
};

// Wrappers must have standard layout
struct WrapperBase {
__amdgpu_named_workgroup_barrier_t x;
};

struct WrapperWithBase : public WrapperBase {
};

// expected-error@+2 {{named barrier wrapper 'WrapperWithBaseNoStandardLayout' must have a C++11 standard layou}}
// expected-note@+1 {{'WrapperWithBaseNoStandardLayout' is a named barrier wrapper because it inherits from named barrier wrapper 'WrapperBase'}}
struct WrapperWithBaseNoStandardLayout : public WrapperBase {
  unsigned K = 0;
};

// Wrappers of Wrappers have the same restrictions.
struct WrapperOfWrapperWithTooManyFields { // expected-note {{'WrapperOfWrapperWithTooManyFields' is not a named barrier wrapper because it has more than one field}}
  TestSimple x; // expected-error {{field with barrier type 'TestSimple' seen in a structure that is not a named barrier wrapper}}
  int other;
};

struct WrapperOfWrapper {
  WrapperWithBase y;
};

// Check templated cases with a bit of complexity thrown in.
template<typename Derived>
class CRTPWrapperBase {
  CRTPWrapperBase() {
    static_cast<Derived*>(this)->sayHello();
  }

  WrapperOfWrapper wow;
};

class TemplatedWrapperImpl : public CRTPWrapperBase<TemplatedWrapperImpl> {
  void sayHello() {}
};

// expected-error@+2 {{named barrier wrapper 'TemplatedWrapperImplNoStandardLayout' must have a C++11 standard layou}}
// expected-note@+1 {{'TemplatedWrapperImplNoStandardLayout' is a named barrier wrapper because it inherits from named barrier wrapper 'CRTPWrapperBase<TemplatedWrapperImpl>'}}
class TemplatedWrapperImplNoStandardLayout : public CRTPWrapperBase<TemplatedWrapperImpl> {
  void sayHello() {}

  int k = 0;
};

static_assert(sizeof(__amdgpu_named_workgroup_barrier_t) == 16, "wrong size");
static_assert(alignof(__amdgpu_named_workgroup_barrier_t) == 4, "wrong alignment");