Method createCompositeConstruct

SPIRV/SpvBuilder.cpp:4126–4169

OpCompositeConstruct

// OpCompositeConstruct
Id Builder::createCompositeConstruct(Id typeId, const std::vector<Id>& constituents)
{
    assert(isAggregateType(typeId) || (getNumTypeConstituents(typeId) > 1 &&
           getNumTypeConstituents(typeId) == constituents.size()) ||
           ((isCooperativeVectorType(typeId) || isVectorType(typeId)) && constituents.size() == 1));

    if (generatingOpCodeForSpecConst) {
        // Sometime, even in spec-constant-op mode, the constant composite to be
        // constructed may not be a specialization constant.
        // e.g.:
        //  const mat2 m2 = mat2(a_spec_const, a_front_end_const, another_front_end_const, third_front_end_const);
        // The first column vector should be a spec constant one, as a_spec_const is a spec constant.
        // The second column vector should NOT be spec constant, as it does not contain any spec constants.
        // To handle such cases, we check the constituents of the constant vector to determine whether this
        // vector should be created as a spec constant.
        return makeCompositeConstant(typeId, constituents,
                                     std::any_of(constituents.begin(), constituents.end(),
                                                 [&](spv::Id id) { return isSpecConstant(id); }));
    }

    bool replicate = false;
    size_t numConstituents = constituents.size();

    if (useReplicatedComposites || isCooperativeVectorType(typeId)) {
        replicate = numConstituents > 0 &&
            std::equal(constituents.begin() + 1, constituents.end(), constituents.begin());
    }

    if (replicate) {
        numConstituents = 1;
        addCapability(spv::Capability::ReplicatedCompositesEXT);
        addExtension(spv::E_SPV_EXT_replicated_composites);
    }

    Op opcode = replicate ? Op::OpCompositeConstructReplicateEXT : Op::OpCompositeConstruct;

    Instruction* op = new Instruction(getUniqueId(), typeId, opcode);
    op->reserveOperands(constituents.size());
    for (size_t c = 0; c < numConstituents; ++c)
        op->addIdOperand(constituents[c]);
    addInstruction(std::unique_ptr<Instruction>(op));

    return op->getResultId();
}

// coopmat conversion
Id Builder::createCooperativeMatrixConversion(Id typeId, Id source)