FunctionInfo.cpp

Go to the documentation of this file.

//===----- FunctionInfo.cpp - ABI Function Information ----------- C++ ----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#include "llvm/ABI/FunctionInfo.h"
 
using namespace llvm;
using namespace llvm::abi;
 
std::unique_ptr<FunctionInfo>
FunctionInfo::create(CallingConv::ID CC, const Type *ReturnType,
                     ArrayRef<const Type *> ArgTypes, RequiredArgs Required) {
 
  assert((!Required.allowsOptionalArgs() ||
          Required.getNumRequiredArgs() <= ArgTypes.size()) &&
         "declared parameters cannot outnumber the arguments");
 
  void *Buffer = operator new(totalSizeToAlloc<ArgEntry>(ArgTypes.size()));
 
  // FunctionInfo overloads operator delete, so we can use std::unique_ptr
  // without worrying about sized deallocation of trailing objects.
  std::unique_ptr<FunctionInfo> FI(
      new (Buffer) FunctionInfo(CC, ReturnType, ArgTypes.size(), Required));
 
  ArgEntry *Args = FI->getTrailingObjects();
  for (unsigned I = 0; I < ArgTypes.size(); ++I)
    new (&Args[I]) ArgEntry(ArgTypes[I]);
 
  return FI;
}