gtests/GlslMapIO.FromFile.cpp - third_party/glslang - Git at Google

 //
 // Copyright (C) 2016-2017 Google, Inc.
 // Copyright (C) 2020 The Khronos Group Inc.
 //
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 //    Redistributions of source code must retain the above copyright
 //    notice, this list of conditions and the following disclaimer.
 //
 //    Redistributions in binary form must reproduce the above
 //    copyright notice, this list of conditions and the following
 //    disclaimer in the documentation and/or other materials provided
 //    with the distribution.
 //
 //    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
 //    contributors may be used to endorse or promote products derived
 //    from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 // COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 // ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 // POSSIBILITY OF SUCH DAMAGE.
 //
 #include <algorithm>

 #include <gtest/gtest.h>

 #include "TestFixture.h"

 #include "glslang/MachineIndependent/iomapper.h"
 #include "glslang/MachineIndependent/reflection.h"

 namespace glslangtest {
 namespace {

 struct IoMapData {
     std::vector<std::string> fileNames;
     Semantics semantics;
 };

 using GlslMapIOTest = GlslangTest <::testing::TestWithParam<IoMapData>>;

 template<class T>
 std::string interfaceName(T symbol) {
     return symbol.getType()->getBasicType() == glslang::EbtBlock ? std::string(symbol.getType()->getTypeName().c_str()) : symbol.name;
 }

 bool verifyIOMapping(std::string& linkingError, glslang::TProgram& program) {
     bool success = true;

     // Verify IO Mapping by generating reflection for each stage individually
     // and comparing layout qualifiers on the results


     int reflectionOptions = EShReflectionDefault;
     //reflectionOptions |= EShReflectionStrictArraySuffix;
     //reflectionOptions |= EShReflectionBasicArraySuffix;
     reflectionOptions |= EShReflectionIntermediateIO;
     reflectionOptions |= EShReflectionSeparateBuffers;
     reflectionOptions |= EShReflectionAllBlockVariables;
     //reflectionOptions |= EShReflectionUnwrapIOBlocks;

     success &= program.buildReflection(reflectionOptions);

     // check that the reflection output from the individual stages all makes sense..
     std::vector<glslang::TReflection> stageReflections;
     for (int s = 0; s < EShLangCount; ++s) {
         if (program.getIntermediate((EShLanguage)s)) {
             stageReflections.emplace_back((EShReflectionOptions)reflectionOptions, (EShLanguage)s, (EShLanguage)s);
             success &= stageReflections.back().addStage((EShLanguage)s, *program.getIntermediate((EShLanguage)s));
         }
     }

     // check that input/output locations match between stages
     auto it = stageReflections.begin();
     auto nextIt = it + 1;
     for (; nextIt != stageReflections.end(); it++, nextIt++) {
         int numOut = it->getNumPipeOutputs();
         std::map<std::string, const glslang::TObjectReflection*> pipeOut;

         for (int i = 0; i < numOut; i++) {
             const glslang::TObjectReflection& out = it->getPipeOutput(i);
             std::string name = interfaceName(out);
             pipeOut[name] = &out;
         }

         int numIn = nextIt->getNumPipeInputs();
         for (int i = 0; i < numIn; i++) {
             auto in = nextIt->getPipeInput(i);
             std::string name = interfaceName(in);
             auto out = pipeOut.find(name);

             if (out != pipeOut.end()) {
                 auto inQualifier = in.getType()->getQualifier();
                 auto outQualifier = out->second->getType()->getQualifier();
                 success &= outQualifier.layoutLocation == inQualifier.layoutLocation;
             }
             else {
                 if (!in.getType()->isStruct()) {
                     bool found = false;
                     for (auto outIt : pipeOut) {
                         if (outIt.second->getType()->isStruct()) {
                             unsigned int baseLoc = outIt.second->getType()->getQualifier().hasLocation() ?
                                 outIt.second->getType()->getQualifier().layoutLocation :
                                 std::numeric_limits<unsigned int>::max();
                             for (size_t j = 0; j < outIt.second->getType()->getStruct()->size(); j++) {
                                 baseLoc = (*outIt.second->getType()->getStruct())[j].type->getQualifier().hasLocation() ?
                                     (*outIt.second->getType()->getStruct())[j].type->getQualifier().layoutLocation : baseLoc;
                                 if (baseLoc != std::numeric_limits<unsigned int>::max()) {
                                     if (baseLoc == in.getType()->getQualifier().layoutLocation) {
                                         found = true;
                                         break;
                                     }
                                     baseLoc += glslang::TIntermediate::computeTypeLocationSize(*(*outIt.second->getType()->getStruct())[j].type, EShLangVertex);
                                 }
                             }
                             if (found) {
                                 break;
                             }
                         }
                     }
                     success &= found;
                 }
                 else {
                     unsigned int baseLoc = in.getType()->getQualifier().hasLocation() ? in.getType()->getQualifier().layoutLocation : -1;
                     for (size_t j = 0; j < in.getType()->getStruct()->size(); j++) {
                         baseLoc = (*in.getType()->getStruct())[j].type->getQualifier().hasLocation() ?
                             (*in.getType()->getStruct())[j].type->getQualifier().layoutLocation : baseLoc;
                         if (baseLoc != std::numeric_limits<unsigned int>::max()) {
                             bool isMemberFound = false;
                             for (auto outIt : pipeOut) {
                                 if (baseLoc == outIt.second->getType()->getQualifier().layoutLocation) {
                                     isMemberFound = true;
                                     break;
                                 }
                             }
                             if (!isMemberFound) {
                                 success &= false;
                                 break;
                             }
                             baseLoc += glslang::TIntermediate::computeTypeLocationSize(*(*in.getType()->getStruct())[j].type, EShLangVertex);
                         }
                     }
                 }
             }
         }
     }

     // compare uniforms in each stage to the program
     {
         int totalUniforms = program.getNumUniformVariables();
         std::map<std::string, const glslang::TObjectReflection*> programUniforms;
         for (int i = 0; i < totalUniforms; i++) {
             const glslang::TObjectReflection& uniform = program.getUniform(i);
             std::string name = interfaceName(uniform);
             programUniforms[name] = &uniform;
         }
         it = stageReflections.begin();
         for (; it != stageReflections.end(); it++) {
             int numUniform = it->getNumUniforms();
             std::map<std::string, glslang::TObjectReflection> uniforms;

             for (int i = 0; i < numUniform; i++) {
                 glslang::TObjectReflection uniform = it->getUniform(i);
                 std::string name = interfaceName(uniform);
                 auto programUniform = programUniforms.find(name);

                 if (programUniform != programUniforms.end()) {
                     auto stageQualifier = uniform.getType()->getQualifier();
                     auto programQualifier = programUniform->second->getType()->getQualifier();

                     success &= stageQualifier.layoutLocation == programQualifier.layoutLocation;
                     success &= stageQualifier.layoutBinding == programQualifier.layoutBinding;
                     success &= stageQualifier.layoutSet == programQualifier.layoutSet;
                 }
                 else {
                     success &= false;
                 }
             }
         }
     }

     // compare uniform blocks in each stage to the program table
     {
         int totalUniforms = program.getNumUniformBlocks();
         std::map<std::string, const glslang::TObjectReflection*> programUniforms;
         for (int i = 0; i < totalUniforms; i++) {
             const glslang::TObjectReflection& uniform = program.getUniformBlock(i);
             std::string name = interfaceName(uniform);
             programUniforms[name] = &uniform;
         }
         it = stageReflections.begin();
         for (; it != stageReflections.end(); it++) {
             int numUniform = it->getNumUniformBlocks();
             std::map<std::string, glslang::TObjectReflection> uniforms;

             for (int i = 0; i < numUniform; i++) {
                 glslang::TObjectReflection uniform = it->getUniformBlock(i);
                 std::string name = interfaceName(uniform);
                 auto programUniform = programUniforms.find(name);

                 if (programUniform != programUniforms.end()) {
                     auto stageQualifier = uniform.getType()->getQualifier();
                     auto programQualifier = programUniform->second->getType()->getQualifier();

                     success &= stageQualifier.layoutLocation == programQualifier.layoutLocation;
                     success &= stageQualifier.layoutBinding == programQualifier.layoutBinding;
                     success &= stageQualifier.layoutSet == programQualifier.layoutSet;
                 }
                 else {
                     success &= false;
                 }
             }
         }
     }

     if (!success) {
         linkingError += "Mismatched cross-stage IO\n";
     }

     return success;
 }

 TEST_P(GlslMapIOTest, FromFile)
 {
     const auto& fileNames = GetParam().fileNames;
     Semantics semantics = GetParam().semantics;
     const size_t fileCount = fileNames.size();
     const EShMessages controls = DeriveOptions(Source::GLSL, semantics, Target::BothASTAndSpv);
     GlslangResult result;

     // Compile each input shader file.
     bool success = true;
     std::vector<std::unique_ptr<glslang::TShader>> shaders;
     for (size_t i = 0; i < fileCount; ++i) {
         std::string contents;
         tryLoadFile(GlobalTestSettings.testRoot + "/" + fileNames[i],
             "input", &contents);
         shaders.emplace_back(
             new glslang::TShader(GetShaderStage(GetSuffix(fileNames[i]))));
         auto* shader = shaders.back().get();

         shader->setAutoMapLocations(true);
         shader->setAutoMapBindings(true);

         if (controls & EShMsgSpvRules) {
             if (controls & EShMsgVulkanRules) {
                 shader->setEnvInput((controls & EShMsgReadHlsl) ? glslang::EShSourceHlsl
                                                                : glslang::EShSourceGlsl,
                                     shader->getStage(), glslang::EShClientVulkan, 100);
                 shader->setEnvClient(glslang::EShClientVulkan, glslang::EShTargetVulkan_1_1);
                 shader->setEnvTarget(glslang::EShTargetSpv, glslang::EShTargetSpv_1_0);
             } else {
                 shader->setEnvInput((controls & EShMsgReadHlsl) ? glslang::EShSourceHlsl
                                                                : glslang::EShSourceGlsl,
                                     shader->getStage(), glslang::EShClientOpenGL, 100);
                 shader->setEnvClient(glslang::EShClientOpenGL, glslang::EShTargetOpenGL_450);
                 shader->setEnvTarget(glslang::EshTargetSpv, glslang::EShTargetSpv_1_0);
             }
         }

         success &= compile(shader, contents, "", controls);

         result.shaderResults.push_back(
             { fileNames[i], shader->getInfoLog(), shader->getInfoDebugLog() });
     }

     // Link all of them.
     glslang::TProgram program;
     for (const auto& shader : shaders) program.addShader(shader.get());
     success &= program.link(controls);
     result.linkingOutput = program.getInfoLog();
     result.linkingError = program.getInfoDebugLog();

     unsigned int stage = 0;
     glslang::TIntermediate* firstIntermediate = nullptr;
     while (!program.getIntermediate((EShLanguage)stage) && stage < EShLangCount) { stage++; }
     firstIntermediate = program.getIntermediate((EShLanguage)stage);

     glslang::TDefaultGlslIoResolver resolver(*firstIntermediate);
     glslang::TGlslIoMapper ioMapper;

     if (success) {
         success &= program.mapIO(&resolver, &ioMapper);
         result.linkingOutput = program.getInfoLog();
         result.linkingError = program.getInfoDebugLog();
     }

     success &= verifyIOMapping(result.linkingError, program);
     result.validationResult = success;

     if (success && (controls & EShMsgSpvRules)) {
         for (int stage = 0; stage < EShLangCount; ++stage) {
             if (program.getIntermediate((EShLanguage)stage)) {
                 spv::SpvBuildLogger logger;
                 std::vector<uint32_t> spirv_binary;
                 options().disableOptimizer = false;
                 glslang::GlslangToSpv(*program.getIntermediate((EShLanguage)stage),
                     spirv_binary, &logger, &options());

                 std::ostringstream disassembly_stream;
                 spv::Parameterize();
                 spv::Disassemble(disassembly_stream, spirv_binary);
                 result.spirvWarningsErrors += logger.getAllMessages();
                 result.spirv += disassembly_stream.str();
                 result.validationResult &= !options().validate || logger.getAllMessages().empty();
             }
         }
     }

     std::ostringstream stream;
     outputResultToStream(&stream, result, controls);

     // Check with expected results.
     const std::string expectedOutputFname =
         GlobalTestSettings.testRoot + "/baseResults/" + fileNames.front() + ".out";
     std::string expectedOutput;
     tryLoadFile(expectedOutputFname, "expected output", &expectedOutput);

     checkEqAndUpdateIfRequested(expectedOutput, stream.str(), expectedOutputFname,
         result.spirvWarningsErrors);
 }

 // clang-format off
 INSTANTIATE_TEST_SUITE_P(
     Glsl, GlslMapIOTest,
     ::testing::ValuesIn(std::vector<IoMapData>({
         {{"iomap.crossStage.vert", "iomap.crossStage.frag" }, Semantics::OpenGL},
         {{"iomap.crossStage.2.vert", "iomap.crossStage.2.geom", "iomap.crossStage.2.frag" }, Semantics::OpenGL},
         {{"iomap.blockOutVariableIn.vert", "iomap.blockOutVariableIn.frag"}, Semantics::OpenGL},
         {{"iomap.variableOutBlockIn.vert", "iomap.variableOutBlockIn.frag"}, Semantics::OpenGL},
         {{"iomap.blockOutVariableIn.2.vert", "iomap.blockOutVariableIn.geom"}, Semantics::OpenGL},
         {{"iomap.variableOutBlockIn.2.vert", "iomap.variableOutBlockIn.geom"}, Semantics::OpenGL},
         // vulkan semantics
         {{"iomap.crossStage.vk.vert", "iomap.crossStage.vk.geom", "iomap.crossStage.vk.frag" }, Semantics::Vulkan},
     }))
 );
 // clang-format on

 }  // anonymous namespace
 }  // namespace glslangtest
	//
	// Copyright (C) 2016-2017 Google, Inc.
	// Copyright (C) 2020 The Khronos Group Inc.
	//
	// All rights reserved.
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions
	// are met:
	//
	// Redistributions of source code must retain the above copyright
	// notice, this list of conditions and the following disclaimer.
	//
	// Redistributions in binary form must reproduce the above
	// copyright notice, this list of conditions and the following
	// disclaimer in the documentation and/or other materials provided
	// with the distribution.
	//
	// Neither the name of 3Dlabs Inc. Ltd. nor the names of its
	// contributors may be used to endorse or promote products derived
	// from this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
	// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	// POSSIBILITY OF SUCH DAMAGE.
	//
	#include <algorithm>

	#include <gtest/gtest.h>

	#include "TestFixture.h"

	#include "glslang/MachineIndependent/iomapper.h"
	#include "glslang/MachineIndependent/reflection.h"

	namespace glslangtest {
	namespace {

	struct IoMapData {
	std::vector<std::string> fileNames;
	Semantics semantics;
	};

	using GlslMapIOTest = GlslangTest <::testing::TestWithParam<IoMapData>>;

	template<class T>
	std::string interfaceName(T symbol) {
	return symbol.getType()->getBasicType() == glslang::EbtBlock ? std::string(symbol.getType()->getTypeName().c_str()) : symbol.name;
	}

	bool verifyIOMapping(std::string& linkingError, glslang::TProgram& program) {
	bool success = true;

	// Verify IO Mapping by generating reflection for each stage individually
	// and comparing layout qualifiers on the results


	int reflectionOptions = EShReflectionDefault;
	//reflectionOptions \|= EShReflectionStrictArraySuffix;
	//reflectionOptions \|= EShReflectionBasicArraySuffix;
	reflectionOptions \|= EShReflectionIntermediateIO;
	reflectionOptions \|= EShReflectionSeparateBuffers;
	reflectionOptions \|= EShReflectionAllBlockVariables;
	//reflectionOptions \|= EShReflectionUnwrapIOBlocks;

	success &= program.buildReflection(reflectionOptions);

	// check that the reflection output from the individual stages all makes sense..
	std::vector<glslang::TReflection> stageReflections;
	for (int s = 0; s < EShLangCount; ++s) {
	if (program.getIntermediate((EShLanguage)s)) {
	stageReflections.emplace_back((EShReflectionOptions)reflectionOptions, (EShLanguage)s, (EShLanguage)s);
	success &= stageReflections.back().addStage((EShLanguage)s, *program.getIntermediate((EShLanguage)s));
	}
	}

	// check that input/output locations match between stages
	auto it = stageReflections.begin();
	auto nextIt = it + 1;
	for (; nextIt != stageReflections.end(); it++, nextIt++) {
	int numOut = it->getNumPipeOutputs();
	std::map<std::string, const glslang::TObjectReflection*> pipeOut;

	for (int i = 0; i < numOut; i++) {
	const glslang::TObjectReflection& out = it->getPipeOutput(i);
	std::string name = interfaceName(out);
	pipeOut[name] = &out;
	}

	int numIn = nextIt->getNumPipeInputs();
	for (int i = 0; i < numIn; i++) {
	auto in = nextIt->getPipeInput(i);
	std::string name = interfaceName(in);
	auto out = pipeOut.find(name);

	if (out != pipeOut.end()) {
	auto inQualifier = in.getType()->getQualifier();
	auto outQualifier = out->second->getType()->getQualifier();
	success &= outQualifier.layoutLocation == inQualifier.layoutLocation;
	}
	else {
	if (!in.getType()->isStruct()) {
	bool found = false;
	for (auto outIt : pipeOut) {
	if (outIt.second->getType()->isStruct()) {
	unsigned int baseLoc = outIt.second->getType()->getQualifier().hasLocation() ?
	outIt.second->getType()->getQualifier().layoutLocation :
	std::numeric_limits<unsigned int>::max();
	for (size_t j = 0; j < outIt.second->getType()->getStruct()->size(); j++) {
	baseLoc = (*outIt.second->getType()->getStruct())[j].type->getQualifier().hasLocation() ?
	(*outIt.second->getType()->getStruct())[j].type->getQualifier().layoutLocation : baseLoc;
	if (baseLoc != std::numeric_limits<unsigned int>::max()) {
	if (baseLoc == in.getType()->getQualifier().layoutLocation) {
	found = true;
	break;
	}
	baseLoc += glslang::TIntermediate::computeTypeLocationSize((outIt.second->getType()->getStruct())[j].type, EShLangVertex);
	}
	}
	if (found) {
	break;
	}
	}
	}
	success &= found;
	}
	else {
	unsigned int baseLoc = in.getType()->getQualifier().hasLocation() ? in.getType()->getQualifier().layoutLocation : -1;
	for (size_t j = 0; j < in.getType()->getStruct()->size(); j++) {
	baseLoc = (*in.getType()->getStruct())[j].type->getQualifier().hasLocation() ?
	(*in.getType()->getStruct())[j].type->getQualifier().layoutLocation : baseLoc;
	if (baseLoc != std::numeric_limits<unsigned int>::max()) {
	bool isMemberFound = false;
	for (auto outIt : pipeOut) {
	if (baseLoc == outIt.second->getType()->getQualifier().layoutLocation) {
	isMemberFound = true;
	break;
	}
	}
	if (!isMemberFound) {
	success &= false;
	break;
	}
	baseLoc += glslang::TIntermediate::computeTypeLocationSize((in.getType()->getStruct())[j].type, EShLangVertex);
	}
	}
	}
	}
	}
	}

	// compare uniforms in each stage to the program
	{
	int totalUniforms = program.getNumUniformVariables();
	std::map<std::string, const glslang::TObjectReflection*> programUniforms;
	for (int i = 0; i < totalUniforms; i++) {
	const glslang::TObjectReflection& uniform = program.getUniform(i);
	std::string name = interfaceName(uniform);
	programUniforms[name] = &uniform;
	}
	it = stageReflections.begin();
	for (; it != stageReflections.end(); it++) {
	int numUniform = it->getNumUniforms();
	std::map<std::string, glslang::TObjectReflection> uniforms;

	for (int i = 0; i < numUniform; i++) {
	glslang::TObjectReflection uniform = it->getUniform(i);
	std::string name = interfaceName(uniform);
	auto programUniform = programUniforms.find(name);

	if (programUniform != programUniforms.end()) {
	auto stageQualifier = uniform.getType()->getQualifier();
	auto programQualifier = programUniform->second->getType()->getQualifier();

	success &= stageQualifier.layoutLocation == programQualifier.layoutLocation;
	success &= stageQualifier.layoutBinding == programQualifier.layoutBinding;
	success &= stageQualifier.layoutSet == programQualifier.layoutSet;
	}
	else {
	success &= false;
	}
	}
	}
	}

	// compare uniform blocks in each stage to the program table
	{
	int totalUniforms = program.getNumUniformBlocks();
	std::map<std::string, const glslang::TObjectReflection*> programUniforms;
	for (int i = 0; i < totalUniforms; i++) {
	const glslang::TObjectReflection& uniform = program.getUniformBlock(i);
	std::string name = interfaceName(uniform);
	programUniforms[name] = &uniform;
	}
	it = stageReflections.begin();
	for (; it != stageReflections.end(); it++) {
	int numUniform = it->getNumUniformBlocks();
	std::map<std::string, glslang::TObjectReflection> uniforms;

	for (int i = 0; i < numUniform; i++) {
	glslang::TObjectReflection uniform = it->getUniformBlock(i);
	std::string name = interfaceName(uniform);
	auto programUniform = programUniforms.find(name);

	if (programUniform != programUniforms.end()) {
	auto stageQualifier = uniform.getType()->getQualifier();
	auto programQualifier = programUniform->second->getType()->getQualifier();

	success &= stageQualifier.layoutLocation == programQualifier.layoutLocation;
	success &= stageQualifier.layoutBinding == programQualifier.layoutBinding;
	success &= stageQualifier.layoutSet == programQualifier.layoutSet;
	}
	else {
	success &= false;
	}
	}
	}
	}

	if (!success) {
	linkingError += "Mismatched cross-stage IO\n";
	}

	return success;
	}

	TEST_P(GlslMapIOTest, FromFile)
	{
	const auto& fileNames = GetParam().fileNames;
	Semantics semantics = GetParam().semantics;
	const size_t fileCount = fileNames.size();
	const EShMessages controls = DeriveOptions(Source::GLSL, semantics, Target::BothASTAndSpv);
	GlslangResult result;

	// Compile each input shader file.
	bool success = true;
	std::vector<std::unique_ptr<glslang::TShader>> shaders;
	for (size_t i = 0; i < fileCount; ++i) {
	std::string contents;
	tryLoadFile(GlobalTestSettings.testRoot + "/" + fileNames[i],
	"input", &contents);
	shaders.emplace_back(
	new glslang::TShader(GetShaderStage(GetSuffix(fileNames[i]))));
	auto* shader = shaders.back().get();

	shader->setAutoMapLocations(true);
	shader->setAutoMapBindings(true);

	if (controls & EShMsgSpvRules) {
	if (controls & EShMsgVulkanRules) {
	shader->setEnvInput((controls & EShMsgReadHlsl) ? glslang::EShSourceHlsl
	: glslang::EShSourceGlsl,
	shader->getStage(), glslang::EShClientVulkan, 100);
	shader->setEnvClient(glslang::EShClientVulkan, glslang::EShTargetVulkan_1_1);
	shader->setEnvTarget(glslang::EShTargetSpv, glslang::EShTargetSpv_1_0);
	} else {
	shader->setEnvInput((controls & EShMsgReadHlsl) ? glslang::EShSourceHlsl
	: glslang::EShSourceGlsl,
	shader->getStage(), glslang::EShClientOpenGL, 100);
	shader->setEnvClient(glslang::EShClientOpenGL, glslang::EShTargetOpenGL_450);
	shader->setEnvTarget(glslang::EshTargetSpv, glslang::EShTargetSpv_1_0);
	}
	}

	success &= compile(shader, contents, "", controls);

	result.shaderResults.push_back(
	{ fileNames[i], shader->getInfoLog(), shader->getInfoDebugLog() });
	}

	// Link all of them.
	glslang::TProgram program;
	for (const auto& shader : shaders) program.addShader(shader.get());
	success &= program.link(controls);
	result.linkingOutput = program.getInfoLog();
	result.linkingError = program.getInfoDebugLog();

	unsigned int stage = 0;
	glslang::TIntermediate* firstIntermediate = nullptr;
	while (!program.getIntermediate((EShLanguage)stage) && stage < EShLangCount) { stage++; }
	firstIntermediate = program.getIntermediate((EShLanguage)stage);

	glslang::TDefaultGlslIoResolver resolver(*firstIntermediate);
	glslang::TGlslIoMapper ioMapper;

	if (success) {
	success &= program.mapIO(&resolver, &ioMapper);
	result.linkingOutput = program.getInfoLog();
	result.linkingError = program.getInfoDebugLog();
	}

	success &= verifyIOMapping(result.linkingError, program);
	result.validationResult = success;

	if (success && (controls & EShMsgSpvRules)) {
	for (int stage = 0; stage < EShLangCount; ++stage) {
	if (program.getIntermediate((EShLanguage)stage)) {
	spv::SpvBuildLogger logger;
	std::vector<uint32_t> spirv_binary;
	options().disableOptimizer = false;
	glslang::GlslangToSpv(*program.getIntermediate((EShLanguage)stage),
	spirv_binary, &logger, &options());

	std::ostringstream disassembly_stream;
	spv::Parameterize();
	spv::Disassemble(disassembly_stream, spirv_binary);
	result.spirvWarningsErrors += logger.getAllMessages();
	result.spirv += disassembly_stream.str();
	result.validationResult &= !options().validate \|\| logger.getAllMessages().empty();
	}
	}
	}

	std::ostringstream stream;
	outputResultToStream(&stream, result, controls);

	// Check with expected results.
	const std::string expectedOutputFname =
	GlobalTestSettings.testRoot + "/baseResults/" + fileNames.front() + ".out";
	std::string expectedOutput;
	tryLoadFile(expectedOutputFname, "expected output", &expectedOutput);

	checkEqAndUpdateIfRequested(expectedOutput, stream.str(), expectedOutputFname,
	result.spirvWarningsErrors);
	}

	// clang-format off
	INSTANTIATE_TEST_SUITE_P(
	Glsl, GlslMapIOTest,
	::testing::ValuesIn(std::vector<IoMapData>({
	{{"iomap.crossStage.vert", "iomap.crossStage.frag" }, Semantics::OpenGL},
	{{"iomap.crossStage.2.vert", "iomap.crossStage.2.geom", "iomap.crossStage.2.frag" }, Semantics::OpenGL},
	{{"iomap.blockOutVariableIn.vert", "iomap.blockOutVariableIn.frag"}, Semantics::OpenGL},
	{{"iomap.variableOutBlockIn.vert", "iomap.variableOutBlockIn.frag"}, Semantics::OpenGL},
	{{"iomap.blockOutVariableIn.2.vert", "iomap.blockOutVariableIn.geom"}, Semantics::OpenGL},
	{{"iomap.variableOutBlockIn.2.vert", "iomap.variableOutBlockIn.geom"}, Semantics::OpenGL},
	// vulkan semantics
	{{"iomap.crossStage.vk.vert", "iomap.crossStage.vk.geom", "iomap.crossStage.vk.frag" }, Semantics::Vulkan},
	}))
	);
	// clang-format on

	} // anonymous namespace
	} // namespace glslangtest