test/val/val_mesh_shading_test.cpp

// Copyright (c) 2022 The Khronos Group Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Tests instructions from SPV_EXT_mesh_shader

#include <sstream>
#include <string>

#include "gmock/gmock.h"
#include "test/val/val_fixtures.h"

namespace spvtools {
namespace val {
namespace {

using ::testing::HasSubstr;
using ::testing::Values;

using ValidateMeshShading = spvtest::ValidateBase<bool>;

TEST_F(ValidateMeshShading, EmitMeshTasksEXTNotLastInstructionUniversal) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint TaskEXT %main "main" %p
               OpExecutionModeId %main LocalSizeId %uint_1 %uint_1 %uint_1
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %uint = OpTypeInt 32 0
     %uint_1 = OpConstant %uint 1
      %float = OpTypeFloat 32
  %arr_float = OpTypeArray %float %uint_1
    %Payload = OpTypeStruct %arr_float
%ptr_Payload = OpTypePointer TaskPayloadWorkgroupEXT %Payload
          %p = OpVariable %ptr_Payload TaskPayloadWorkgroupEXT
       %main = OpFunction %void None %func
     %label1 = OpLabel
               OpEmitMeshTasksEXT %uint_1 %uint_1 %uint_1 %p
               OpBranch %label2
     %label2 = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_4);
  EXPECT_EQ(SPV_ERROR_INVALID_LAYOUT,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_4));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("Branch must appear in a block"));
}

TEST_F(ValidateMeshShading, EmitMeshTasksEXTNotLastInstructionVulkan) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint TaskEXT %main "main" %p
               OpExecutionModeId %main LocalSizeId %uint_1 %uint_1 %uint_1
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %uint = OpTypeInt 32 0
     %uint_1 = OpConstant %uint 1
      %float = OpTypeFloat 32
  %arr_float = OpTypeArray %float %uint_1
    %Payload = OpTypeStruct %arr_float
%ptr_Payload = OpTypePointer TaskPayloadWorkgroupEXT %Payload
          %p = OpVariable %ptr_Payload TaskPayloadWorkgroupEXT
       %main = OpFunction %void None %func
     %label1 = OpLabel
               OpEmitMeshTasksEXT %uint_1 %uint_1 %uint_1 %p
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_VULKAN_1_2);
  EXPECT_EQ(SPV_ERROR_INVALID_LAYOUT, ValidateInstructions(SPV_ENV_VULKAN_1_2));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("Return must appear in a block"));
}

TEST_F(ValidateMeshShading, BasicTaskSuccess) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint TaskEXT %main "main"
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %main = OpFunction %void None %func
      %label = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_SUCCESS, ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
}

TEST_F(ValidateMeshShading, BasicMeshSuccess) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint MeshEXT %main "main"
               OpExecutionMode %main OutputVertices 1
               OpExecutionMode %main OutputPrimitivesEXT 1
               OpExecutionMode %main OutputTrianglesEXT
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %main = OpFunction %void None %func
      %label = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_SUCCESS, ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
}

TEST_F(ValidateMeshShading, VulkanBasicMeshAndTaskSuccess) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpExtension "SPV_NV_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint MeshEXT %mainMesh "mainMesh"
               OpEntryPoint TaskEXT %mainTask "mainTask"
               OpExecutionMode %mainMesh OutputVertices 1
               OpExecutionMode %mainMesh OutputPrimitivesEXT 1
               OpExecutionMode %mainMesh OutputTrianglesEXT
       %void = OpTypeVoid
       %func = OpTypeFunction %void
   %mainMesh = OpFunction %void None %func
  %labelMesh = OpLabel
               OpReturn
               OpFunctionEnd
   %mainTask = OpFunction %void None %func
  %labelTask = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_VULKAN_1_2);
  EXPECT_EQ(SPV_SUCCESS, ValidateInstructions(SPV_ENV_VULKAN_1_2));
}

TEST_F(ValidateMeshShading, VulkanBasicMeshAndTaskBad) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpCapability MeshShadingNV
               OpExtension "SPV_EXT_mesh_shader"
               OpExtension "SPV_NV_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint MeshEXT %mainMesh "mainMesh"
               OpEntryPoint TaskNV %mainTask "mainTask"
               OpExecutionMode %mainMesh OutputVertices 1
               OpExecutionMode %mainMesh OutputPrimitivesEXT 1
               OpExecutionMode %mainMesh OutputTrianglesEXT
       %void = OpTypeVoid
       %func = OpTypeFunction %void
   %mainMesh = OpFunction %void None %func
  %labelMesh = OpLabel
               OpReturn
               OpFunctionEnd
   %mainTask = OpFunction %void None %func
  %labelTask = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_VULKAN_1_2);
  EXPECT_EQ(SPV_ERROR_INVALID_LAYOUT, ValidateInstructions(SPV_ENV_VULKAN_1_2));
  EXPECT_THAT(getDiagnosticString(),
              AnyVUID("VUID-StandaloneSpirv-MeshEXT-07102"));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("Module can't mix MeshEXT/TaskEXT with MeshNV/TaskNV "
                        "Execution Model."));
}

TEST_F(ValidateMeshShading, MeshMissingOutputVertices) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint MeshEXT %main "main"
               OpExecutionMode %main OutputPrimitivesEXT 1
               OpExecutionMode %main OutputTrianglesEXT
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %main = OpFunction %void None %func
      %label = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(
      getDiagnosticString(),
      HasSubstr("MeshEXT execution model entry points must specify both "
                "OutputPrimitivesEXT and OutputVertices Execution Modes."));
}

TEST_F(ValidateMeshShading, MeshMissingOutputPrimitivesEXT) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint MeshEXT %main "main"
               OpExecutionMode %main OutputVertices 1
               OpExecutionMode %main OutputTrianglesEXT
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %main = OpFunction %void None %func
      %label = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(
      getDiagnosticString(),
      HasSubstr("MeshEXT execution model entry points must specify both "
                "OutputPrimitivesEXT and OutputVertices Execution Modes."));
}

TEST_F(ValidateMeshShading, MeshMissingOutputType) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint MeshEXT %main "main"
               OpExecutionMode %main OutputVertices 1
               OpExecutionMode %main OutputPrimitivesEXT 1
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %main = OpFunction %void None %func
      %label = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("MeshEXT execution model entry points must specify "
                        "exactly one of OutputPoints, OutputLinesEXT, or "
                        "OutputTrianglesEXT Execution Modes."));
}

TEST_F(ValidateMeshShading, MeshMultipleOutputType) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint MeshEXT %main "main"
               OpExecutionMode %main OutputVertices 1
               OpExecutionMode %main OutputPrimitivesEXT 1
               OpExecutionMode %main OutputLinesEXT
               OpExecutionMode %main OutputTrianglesEXT
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %main = OpFunction %void None %func
      %label = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("MeshEXT execution model entry points must specify "
                        "exactly one of OutputPoints, OutputLinesEXT, or "
                        "OutputTrianglesEXT Execution Modes."));
}

TEST_F(ValidateMeshShading, BadExecutionModelOutputLinesEXT) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint GLCompute %main "main"
               OpExecutionMode %main OutputLinesEXT
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %main = OpFunction %void None %func
      %label = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("Execution mode can only be used with the MeshEXT or "
                        "MeshNV execution model."));
}

TEST_F(ValidateMeshShading, BadExecutionModelOutputTrianglesEXT) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint GLCompute %main "main"
               OpExecutionMode %main OutputTrianglesEXT
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %main = OpFunction %void None %func
      %label = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("Execution mode can only be used with the MeshEXT or "
                        "MeshNV execution model."));
}

TEST_F(ValidateMeshShading, BadExecutionModelOutputPrimitivesEXT) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint GLCompute %main "main"
               OpExecutionMode %main OutputPrimitivesEXT 1
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %main = OpFunction %void None %func
      %label = OpLabel
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("Execution mode can only be used with the MeshEXT or "
                        "MeshNV execution model."));
}

TEST_F(ValidateMeshShading, OpEmitMeshTasksBadGroupCountSignedInt) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint TaskEXT %main "main"
       %void = OpTypeVoid
       %func = OpTypeFunction %void
        %int = OpTypeInt 32 1
       %uint = OpTypeInt 32 0
      %int_1 = OpConstant %int 1
     %uint_1 = OpConstant %uint 1
       %main = OpFunction %void None %func
       %label = OpLabel
               OpEmitMeshTasksEXT %int_1 %uint_1 %uint_1
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("Group Count X must be a 32-bit unsigned int scalar"));
}

TEST_F(ValidateMeshShading, OpEmitMeshTasksBadGroupCountVector) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint TaskEXT %main "main"
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %uint = OpTypeInt 32 0
     %v2uint = OpTypeVector %uint 2
%_ptr_v2uint = OpTypePointer Function %v2uint
     %uint_1 = OpConstant %uint 1
  %composite = OpConstantComposite %v2uint %uint_1 %uint_1
  %_ptr_uint = OpTypePointer Function %uint
       %main = OpFunction %void None %func
      %label = OpLabel
          %x = OpVariable %_ptr_v2uint Function
               OpStore %x %composite
         %13 = OpAccessChain %_ptr_uint %x %uint_1
         %14 = OpLoad %uint %13
               OpEmitMeshTasksEXT %14 %composite %uint_1
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("Group Count Y must be a 32-bit unsigned int scalar"));
}

TEST_F(ValidateMeshShading, OpEmitMeshTasksBadPayload) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint TaskEXT %main "main" %payload
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %uint = OpTypeInt 32 0
       %task = OpTypeStruct %uint
%_ptr_Uniform = OpTypePointer Uniform %task
    %payload = OpVariable %_ptr_Uniform Uniform
     %uint_1 = OpConstant %uint 1
       %main = OpFunction %void None %func
      %label = OpLabel
               OpEmitMeshTasksEXT %uint_1 %uint_1 %uint_1 %payload
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("Payload OpVariable must have a storage class of "
                        "TaskPayloadWorkgroupEXT"));
}

TEST_F(ValidateMeshShading, TaskPayloadWorkgroupBadExecutionModel) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint GLCompute %main "main" %payload
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %uint = OpTypeInt 32 0
%_ptr_TaskPayloadWorkgroupEXT = OpTypePointer TaskPayloadWorkgroupEXT %uint
    %payload = OpVariable %_ptr_TaskPayloadWorkgroupEXT TaskPayloadWorkgroupEXT
       %main = OpFunction %void None %func
      %label = OpLabel
       %load = OpLoad %uint %payload
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_ID, ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("TaskPayloadWorkgroupEXT Storage Class is limited to "
                        "TaskEXT and MeshKHR execution model"));
}

TEST_F(ValidateMeshShading, OpSetMeshOutputsBadVertexCount) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint MeshEXT %main "main"
               OpExecutionMode %main OutputVertices 1
               OpExecutionMode %main OutputPrimitivesNV 1
               OpExecutionMode %main OutputTrianglesNV
       %void = OpTypeVoid
          %3 = OpTypeFunction %void
        %int = OpTypeInt 32 1
       %uint = OpTypeInt 32 0
  %_ptr_int = OpTypePointer Function %int
      %int_1 = OpConstant %int 1
     %uint_1 = OpConstant %uint 1
       %main = OpFunction %void None %3
          %5 = OpLabel
          %x = OpVariable %_ptr_int Function
               OpStore %x %int_1
       %load = OpLoad %int %x
               OpSetMeshOutputsEXT %load %uint_1
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(getDiagnosticString(),
              HasSubstr("Vertex Count must be a 32-bit unsigned int scalar"));
}

TEST_F(ValidateMeshShading, OpSetMeshOutputsBadPrimitiveCount) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint MeshEXT %main "main"
               OpExecutionMode %main OutputVertices 1
               OpExecutionMode %main OutputPrimitivesNV 1
               OpExecutionMode %main OutputTrianglesNV
       %void = OpTypeVoid
          %3 = OpTypeFunction %void
        %int = OpTypeInt 32 1
       %uint = OpTypeInt 32 0
      %int_1 = OpConstant %int 1
     %uint_1 = OpConstant %uint 1
       %main = OpFunction %void None %3
          %5 = OpLabel
               OpSetMeshOutputsEXT %uint_1 %int_1
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_DATA,
            ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(
      getDiagnosticString(),
      HasSubstr("Primitive Count must be a 32-bit unsigned int scalar"));
}

TEST_F(ValidateMeshShading, OpSetMeshOutputsBadExecutionModel) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint TaskEXT %main "main"
       %void = OpTypeVoid
          %3 = OpTypeFunction %void
       %uint = OpTypeInt 32 0
     %uint_1 = OpConstant %uint 1
       %main = OpFunction %void None %3
          %5 = OpLabel
               OpSetMeshOutputsEXT %uint_1 %uint_1
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_ERROR_INVALID_ID, ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
  EXPECT_THAT(
      getDiagnosticString(),
      HasSubstr("OpSetMeshOutputsEXT requires MeshEXT execution model"));
}

TEST_F(ValidateMeshShading, OpSetMeshOutputsZeroSuccess) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint MeshEXT %main "main"
               OpExecutionMode %main OutputVertices 1
               OpExecutionMode %main OutputPrimitivesNV 1
               OpExecutionMode %main OutputTrianglesNV
       %void = OpTypeVoid
          %3 = OpTypeFunction %void
       %uint = OpTypeInt 32 0
     %uint_0 = OpConstant %uint 0
       %main = OpFunction %void None %3
          %5 = OpLabel
               OpSetMeshOutputsEXT %uint_0 %uint_0
               OpReturn
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_SUCCESS, ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
}

TEST_F(ValidateMeshShading, OpEmitMeshTasksZeroSuccess) {
  const std::string body = R"(
               OpCapability MeshShadingEXT
               OpExtension "SPV_EXT_mesh_shader"
               OpMemoryModel Logical GLSL450
               OpEntryPoint TaskEXT %main "main"
       %void = OpTypeVoid
       %func = OpTypeFunction %void
       %uint = OpTypeInt 32 0
     %uint_0 = OpConstant %uint 1
       %main = OpFunction %void None %func
      %label = OpLabel
               OpEmitMeshTasksEXT %uint_0 %uint_0 %uint_0
               OpFunctionEnd
)";

  CompileSuccessfully(body, SPV_ENV_UNIVERSAL_1_5);
  EXPECT_EQ(SPV_SUCCESS, ValidateInstructions(SPV_ENV_UNIVERSAL_1_5));
}

}  // namespace
}  // namespace val
}  // namespace spvtools