clang/test/SemaHLSL/num_threads.hlsl

// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -x hlsl -ast-dump -o - %s | FileCheck %s
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-mesh -x hlsl -ast-dump -o - %s | FileCheck %s
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-amplification -x hlsl -ast-dump -o - %s | FileCheck %s
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-library -x hlsl -ast-dump -o - %s | FileCheck %s
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-pixel -x hlsl -ast-dump -o - %s -verify
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-vertex -x hlsl -ast-dump -o - %s -verify
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-hull -x hlsl -ast-dump -o - %s -verify
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-domain -x hlsl -ast-dump -o - %s -verify
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -x hlsl -ast-dump -o - %s -DFAIL -verify
// RUN: %clang_cc1 -triple dxil-pc-shadermodel5.0-compute -x hlsl -ast-dump -o - %s -DFAIL -verify
// RUN: %clang_cc1 -triple dxil-pc-shadermodel4.0-compute -x hlsl -ast-dump -o - %s -DFAIL -verify

#if __SHADER_TARGET_STAGE == __SHADER_STAGE_COMPUTE || __SHADER_TARGET_STAGE == __SHADER_STAGE_MESH || __SHADER_TARGET_STAGE == __SHADER_STAGE_AMPLIFICATION || __SHADER_TARGET_STAGE == __SHADER_STAGE_LIBRARY
#ifdef FAIL

// expected-warning@+1 {{'numthreads' attribute only applies to global functions}}
[numthreads(1,1,1)]
struct Fido {
  // expected-warning@+1 {{'numthreads' attribute only applies to global functions}}
  [numthreads(1,1,1)]
  void wag() {}

  // expected-warning@+1 {{'numthreads' attribute only applies to global functions}}
  [numthreads(1,1,1)]
  static void oops() {}
};

// expected-warning@+1 {{'numthreads' attribute only applies to global functions}}
[numthreads(1,1,1)]
static void oops() {}

namespace spec {
// expected-warning@+1 {{'numthreads' attribute only applies to global functions}}
[numthreads(1,1,1)]
static void oops() {}
}

// expected-error@+1 {{'numthreads' attribute parameters do not match the previous declaration}}
[numthreads(1,1,1)]
// expected-note@+1 {{conflicting attribute is here}}
[numthreads(2,2,1)]
int doubledUp() {
  return 1;
}

// expected-note@+1 {{conflicting attribute is here}}
[numthreads(1,1,1)]
int forwardDecl();

// expected-error@+1 {{'numthreads' attribute parameters do not match the previous declaration}}
[numthreads(2,2,1)]
int forwardDecl() {
  return 1;
}

#if __SHADER_TARGET_MAJOR == 6
// expected-error@+1 {{'numthreads' attribute requires exactly 3 arguments}}
[numthreads]
// expected-error@+1 {{'numthreads' attribute requires exactly 3 arguments}}
[numthreads()]
// expected-error@+1 {{'numthreads' attribute requires exactly 3 arguments}}
[numthreads(1,2,3,4)]
// expected-error@+1 {{'numthreads' attribute requires an integer constant}}
[numthreads("1",2,3)]
// expected-error@+1 {{argument 'X' to numthreads attribute cannot exceed 1024}}
[numthreads(-1,2,3)]
// expected-error@+1 {{argument 'Y' to numthreads attribute cannot exceed 1024}}
[numthreads(1,-2,3)]
// expected-error@+1 {{argument 'Z' to numthreads attribute cannot exceed 1024}}
[numthreads(1,2,-3)]
// expected-error@+1 {{total number of threads cannot exceed 1024}}
[numthreads(1024,1024,1024)]
#elif __SHADER_TARGET_MAJOR == 5
// expected-error@+1 {{argument 'Z' to numthreads attribute cannot exceed 64}}
[numthreads(1,2,68)]
#else
// expected-error@+1 {{argument 'Z' to numthreads attribute cannot exceed 1}}
[numthreads(1,2,2)]
// expected-error@+1 {{total number of threads cannot exceed 768}}
[numthreads(1024,1,1)]
#endif // __SHADER_TARGET_MAJOR
#endif // FAIL
// CHECK: HLSLNumThreadsAttr 0x{{[0-9a-fA-F]+}} <line:{{[0-9]+}}:2, col:18> 1 2 1
[numthreads(1,2,1)]
int entry() {
 return 1;
}

// Because these two attributes match, they should both appear in the AST
[numthreads(2,2,1)]
// CHECK: HLSLNumThreadsAttr 0x{{[0-9a-fA-F]+}} <line:90:2, col:18> 2 2 1
int secondFn();

[numthreads(2,2,1)]
// CHECK: HLSLNumThreadsAttr 0x{{[0-9a-fA-F]+}} <line:94:2, col:18> 2 2 1
int secondFn() {
  return 1;
}

[numthreads(4,2,1)]
// CHECK: HLSLNumThreadsAttr 0x{{[0-9a-fA-F]+}} <line:100:2, col:18> 4 2 1
int onlyOnForwardDecl();

// CHECK: HLSLNumThreadsAttr 0x{{[0-9a-fA-F]+}} <line:100:2, col:18> Inherited 4 2 1
int onlyOnForwardDecl() {
  return 1;
}

#else // Vertex and Pixel only beyond here
// expected-error-re@+1 {{attribute 'numthreads' is unsupported in '{{[A-Za-z]+}}' shaders, requires one of the following: compute, amplification, mesh}}
[numthreads(1,1,1)]
int main() {
 return 1;
}

#endif