Method createSpvVariable

SPIRV/GlslangToSpv.cpp:5320–5434

spv::Id TGlslangToSpvTraverser::createSpvVariable(const glslang::TIntermSymbol* node, spv::Id forcedType)
{
    // First, steer off constants, which are not SPIR-V variables, but
    // can still have a mapping to a SPIR-V Id.
    // This includes specialization constants.
    if (node->getQualifier().isConstant()) {
        spv::Id result = createSpvConstant(*node);
        if (result != spv::NoResult) {
            auto name = node->getAsSymbolNode()->getAccessName().c_str();
            auto typeId = convertGlslangToSpvType(node->getType());
            builder.createConstVariable(typeId, name, result, currentFunction == nullptr);
            return result;
        }
    }

    // Now, handle actual variables
    spv::StorageClass storageClass = TranslateStorageClass(node->getType());
    spv::Id spvType = forcedType == spv::NoType ? convertGlslangToSpvType(node->getType())
                                                : forcedType;

    const bool contains16BitType = node->getType().contains16BitFloat() ||
                                   node->getType().contains16BitInt();
    if (contains16BitType) {
        switch (storageClass) {
        case spv::StorageClass::Input:
        case spv::StorageClass::Output:
            builder.addIncorporatedExtension(spv::E_SPV_KHR_16bit_storage, spv::Spv_1_3);
            builder.addCapability(spv::Capability::StorageInputOutput16);
            break;
        case spv::StorageClass::Uniform:
            builder.addIncorporatedExtension(spv::E_SPV_KHR_16bit_storage, spv::Spv_1_3);
            if (node->getType().getQualifier().storage == glslang::EvqBuffer)
                builder.addCapability(spv::Capability::StorageUniformBufferBlock16);
            else
                builder.addCapability(spv::Capability::StorageUniform16);
            break;
        case spv::StorageClass::PushConstant:
            builder.addIncorporatedExtension(spv::E_SPV_KHR_16bit_storage, spv::Spv_1_3);
            builder.addCapability(spv::Capability::StoragePushConstant16);
            break;
        case spv::StorageClass::StorageBuffer:
        case spv::StorageClass::PhysicalStorageBufferEXT:
            builder.addIncorporatedExtension(spv::E_SPV_KHR_16bit_storage, spv::Spv_1_3);
            builder.addCapability(spv::Capability::StorageUniformBufferBlock16);
            break;
        case spv::StorageClass::TileAttachmentQCOM:
            builder.addCapability(spv::Capability::TileShadingQCOM);
            break;
        default:
            if (storageClass == spv::StorageClass::Workgroup &&
                node->getType().getBasicType() == glslang::EbtBlock) {
                builder.addCapability(spv::Capability::WorkgroupMemoryExplicitLayout16BitAccessKHR);
                break;
            }
            if (node->getType().contains16BitFloat())
                builder.addCapability(spv::Capability::Float16);
            if (node->getType().contains16BitInt())
                builder.addCapability(spv::Capability::Int16);