Function FindOrCreateGlobalVariable

source/reduce/reduction_util.cpp:26–47

const uint32_t kFalseBranchOperandIndex = 2;

uint32_t FindOrCreateGlobalVariable(opt::IRContext* context,
                                    uint32_t pointer_type_id) {
  for (auto& inst : context->module()->types_values()) {
    if (inst.opcode() != spv::Op::OpVariable) {
      continue;
    }
    if (inst.type_id() == pointer_type_id) {
      return inst.result_id();
    }
  }
  const uint32_t variable_id = context->TakeNextId();
  auto variable_inst = MakeUnique<opt::Instruction>(
      context, spv::Op::OpVariable, pointer_type_id, variable_id,
      opt::Instruction::OperandList(
          {{SPV_OPERAND_TYPE_STORAGE_CLASS,
            {static_cast<uint32_t>(context->get_type_mgr()
                                       ->GetType(pointer_type_id)
                                       ->AsPointer()
                                       ->storage_class())}}}));
  context->module()->AddGlobalValue(std::move(variable_inst));
  return variable_id;
}

uint32_t FindOrCreateFunctionVariable(opt::IRContext* context,
                                      opt::Function* function,