Method GetAtomicInfo

layers/state_tracker/shader_module.cpp:3088–3120

}

AtomicInstructionInfo Module::GetAtomicInfo(const Instruction& insn) const {
    AtomicInstructionInfo info;

    // All atomics have a pointer referenced
    const uint32_t pointer_index = insn.Opcode() == spv::OpAtomicStore ? 1 : 3;
    const Instruction* access = FindDef(insn.Word(pointer_index));
    const Instruction* pointer = FindDef(access->Word(1));
    info.storage_class = pointer->StorageClass();

    const bool is_untyped = (pointer->Opcode() == spv::OpTypeUntypedPointerKHR);

    const Instruction* data_type = nullptr;
    if (is_untyped) {
        if (insn.Opcode() == spv::OpAtomicStore) {
            const Instruction* value_id = FindDef(insn.Word(4));
            data_type = FindDef(value_id->TypeId());
        } else {
            data_type = FindDef(insn.TypeId());
        }
    } else {
        data_type = FindDef(pointer->Word(3));
    }

    if (data_type->IsVector()) {
        info.vector_size = GetNumComponentsInBaseType(data_type);
        data_type = FindDef(data_type->Word(2));
    }

    info.type = data_type->Opcode();
    info.bit_width = data_type->GetBitWidth();

    return info;
}

spv::StorageClass Module::StorageClass(const Instruction& insn) const {
    spv::StorageClass storage_class = spv::StorageClassMax;