Method GeneratePrototype

be/src/codegen/llvm-codegen.cc:837–867

}

llvm::Function* LlvmCodeGen::FnPrototype::GeneratePrototype(
    LlvmBuilder* builder, llvm::Value** params) {
  vector<llvm::Type*> arguments;
  arguments.reserve(args_.size());
  for (int i = 0; i < args_.size(); ++i) {
    arguments.push_back(args_[i].type);
  }
  llvm::FunctionType* prototype = llvm::FunctionType::get(ret_type_, arguments, false);

  llvm::Function* fn = llvm::Function::Create(
      prototype, llvm::GlobalValue::ExternalLinkage, name_, codegen_->module_);
  DCHECK(fn != NULL);

  // Name the arguments
  int idx = 0;
  for (llvm::Function::arg_iterator iter = fn->arg_begin(); iter != fn->arg_end();
       ++iter, ++idx) {
    iter->setName(args_[idx].name);
    if (params != NULL) params[idx] = &*iter;
  }

  if (builder != NULL) {
    llvm::BasicBlock* entry_block =
        llvm::BasicBlock::Create(codegen_->context(), "entry", fn);
    // Add it to the llvm module via the builder and to the list of handcrafted functions
    // that are a part of the module.
    builder->SetInsertPoint(entry_block);
    codegen_->handcrafted_functions_.push_back(fn);
  }
  return fn;
}

Status LlvmCodeGen::LoadFunction(const TFunction& fn, const string& symbol,
    const ColumnType* return_type, const vector<ColumnType>& arg_types,