godot/thirdparty/glslang/SPIRV/SpvTools.h

//
// Copyright (C) 2014-2016 LunarG, Inc.
// Copyright (C) 2018 Google, Inc.
//
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//    with the distribution.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// 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,
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

//
// Call into SPIRV-Tools to disassemble, validate, and optimize.
//

#pragma once
#ifndef GLSLANG_SPV_TOOLS_H
#define GLSLANG_SPV_TOOLS_H

#if ENABLE_OPT
#include <vector>
#include <ostream>
#include "spirv-tools/libspirv.h"
#endif

#include "glslang/MachineIndependent/localintermediate.h"
#include "Logger.h"

namespace glslang {

struct SpvOptions {
    bool generateDebugInfo {false};
    bool stripDebugInfo {false};
    bool disableOptimizer {true};
    bool optimizeSize {false};
    bool disassemble {false};
    bool validate {false};
    bool emitNonSemanticShaderDebugInfo {false};
    bool emitNonSemanticShaderDebugSource{ false };
};

#if ENABLE_OPT

// Translate glslang's view of target versioning to what SPIRV-Tools uses.
spv_target_env MapToSpirvToolsEnv(const SpvVersion& spvVersion, spv::SpvBuildLogger* logger);

// Use the SPIRV-Tools disassembler to print SPIR-V using a SPV_ENV_UNIVERSAL_1_3 environment.
void SpirvToolsDisassemble(std::ostream& out, const std::vector<unsigned int>& spirv);

// Use the SPIRV-Tools disassembler to print SPIR-V with a provided SPIR-V environment.
void SpirvToolsDisassemble(std::ostream& out, const std::vector<unsigned int>& spirv,
                           spv_target_env requested_context);

// Apply the SPIRV-Tools validator to generated SPIR-V.
void SpirvToolsValidate(const glslang::TIntermediate& intermediate, std::vector<unsigned int>& spirv,
                        spv::SpvBuildLogger*, bool prelegalization);

// Apply the SPIRV-Tools optimizer to generated SPIR-V.  HLSL SPIR-V is legalized in the process.
void SpirvToolsTransform(const glslang::TIntermediate& intermediate, std::vector<unsigned int>& spirv,
                         spv::SpvBuildLogger*, const SpvOptions*);

// Apply the SPIRV-Tools EliminateDeadInputComponents pass to generated SPIR-V. Put result in |spirv|.
void SpirvToolsEliminateDeadInputComponents(spv_target_env target_env, std::vector<unsigned int>& spirv,
                                            spv::SpvBuildLogger*);

// Apply the SPIRV-Tools AnalyzeDeadOutputStores pass to generated SPIR-V. Put result in |live_locs|.
// Return true if the result is valid.
bool SpirvToolsAnalyzeDeadOutputStores(spv_target_env target_env, std::vector<unsigned int>& spirv,
                                       std::unordered_set<uint32_t>* live_locs,
                                       std::unordered_set<uint32_t>* live_builtins, spv::SpvBuildLogger*);

// Apply the SPIRV-Tools EliminateDeadOutputStores and AggressiveDeadCodeElimination passes to generated SPIR-V using
// |live_locs|. Put result in |spirv|.
void SpirvToolsEliminateDeadOutputStores(spv_target_env target_env, std::vector<unsigned int>& spirv,
                                         std::unordered_set<uint32_t>* live_locs,
                                         std::unordered_set<uint32_t>* live_builtins, spv::SpvBuildLogger*);

// Apply the SPIRV-Tools optimizer to strip debug info from SPIR-V.  This is implicitly done by
// SpirvToolsTransform if spvOptions->stripDebugInfo is set, but can be called separately if
// optimization is disabled.
void SpirvToolsStripDebugInfo(const glslang::TIntermediate& intermediate,
        std::vector<unsigned int>& spirv, spv::SpvBuildLogger*);

#endif

} // end namespace glslang

#endif // GLSLANG_SPV_TOOLS_H