path: root/lib/CodeGen/CGException.cpp

//===--- CGException.cpp - Emit LLVM Code for C++ exceptions --------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This contains code dealing with C++ exception related code generation.
//
//===----------------------------------------------------------------------===//

#include "clang/AST/StmtCXX.h"

#include "llvm/Intrinsics.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/Support/CallSite.h"

#include "CGObjCRuntime.h"
#include "CodeGenFunction.h"
#include "CGException.h"
#include "CGCleanup.h"
#include "TargetInfo.h"

using namespace clang;
using namespace CodeGen;

static llvm::Constant *getAllocateExceptionFn(CodeGenFunction &CGF) {
  // void *__cxa_allocate_exception(size_t thrown_size);

  const llvm::Type *SizeTy = CGF.ConvertType(CGF.getContext().getSizeType());
  const llvm::FunctionType *FTy =
    llvm::FunctionType::get(llvm::Type::getInt8PtrTy(CGF.getLLVMContext()),
                            SizeTy, /*IsVarArgs=*/false);

  return CGF.CGM.CreateRuntimeFunction(FTy, "__cxa_allocate_exception");
}

static llvm::Constant *getFreeExceptionFn(CodeGenFunction &CGF) {
  // void __cxa_free_exception(void *thrown_exception);

  const llvm::Type *Int8PtrTy = llvm::Type::getInt8PtrTy(CGF.getLLVMContext());
  const llvm::FunctionType *FTy =
    llvm::FunctionType::