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//===----- CGCall.h - Encapsulate calling convention details ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// These classes wrap the information about a call or function
// definition used to handle ABI compliancy.
//
//===----------------------------------------------------------------------===//
#include "CGCall.h"
#include "CodeGenFunction.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclObjC.h"
#include "llvm/ParameterAttributes.h"
using namespace clang;
using namespace CodeGen;
/***/
static void
constructParamAttrListInternal(const Decl *TargetDecl,
const llvm::SmallVector<QualType, 16> &ArgTypes,
ParamAttrListType &PAL) {
unsigned FuncAttrs = 0;
if (TargetDecl) {
if (TargetDecl->getAttr<NoThrowAttr>())
FuncAttrs |= llvm::ParamAttr::NoUnwind;
if (TargetDecl->getAttr<NoReturnAttr>())
FuncAttrs |= llvm::ParamAttr::NoReturn;
}
unsigned Index = 1;
if (CodeGenFunction::hasAggregateLLVMType(ArgTypes[0])) {
PAL.push_back(llvm::ParamAttrsWithIndex::get(Index,
llvm::ParamAttr::StructRet));
++Index;
} else if (ArgTypes[0]->isPromotableIntegerType()) {
if (ArgTypes[0]->isSignedIntegerType()) {
FuncAttrs |= llvm::ParamAttr::SExt;
} else if (ArgTypes[0]->isUnsignedIntegerType()) {
FuncAttrs |= llvm::ParamAttr::ZExt;
}
}
if (FuncAttrs)
PAL.push_back(llvm::ParamAttrsWithIndex::get(0, FuncAttrs));
for (llvm::SmallVector<QualType, 8>::const_iterator i = ArgTypes.begin() + 1,
e = ArgTypes.end(); i != e; ++i, ++Index) {
QualType ParamType = *i;
unsigned ParamAttrs = 0;
if (ParamType->isRecordType())
ParamAttrs |= llvm::ParamAttr::ByVal;
if (ParamType->isPromotableIntegerType()) {
if (ParamType->isSignedIntegerType()) {
ParamAttrs |= llvm::ParamAttr::SExt;
} else if (ParamType->isUnsignedIntegerType()) {
ParamAttrs |= llvm::ParamAttr::ZExt;
}
}
if (ParamAttrs)
PAL.push_back(llvm::ParamAttrsWithIndex::get(Index, ParamAttrs));
}
}
/***/
// FIXME: Use iterator and sidestep silly type array creation.
CGFunctionInfo::CGFunctionInfo(const FunctionDecl *FD)
: TheDecl(FD)
{
const FunctionType *FTy = FD->getType()->getAsFunctionType();
const FunctionTypeProto *FTP = dyn_cast<FunctionTypeProto>(FTy);
ArgTypes.push_back(FTy->getResultType());
if (FTP)
for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i)
ArgTypes.push_back(FTP->getArgType(i));
}
CGFunctionInfo::CGFunctionInfo(const ObjCMethodDecl *MD,
const ASTContext &Context)
: TheDecl(MD)
{
ArgTypes.push_back(MD->getResultType());
ArgTypes.push_back(MD->getSelfDecl()->getType());
ArgTypes.push_back(Context.getObjCSelType());
for (ObjCMethodDecl::param_const_iterator i = MD->param_begin(),
e = MD->param_end(); i != e; ++i)
ArgTypes.push_back((*i)->getType());
}
void CGFunctionInfo::constructParamAttrList(ParamAttrListType &PAL) const {
constructParamAttrListInternal(TheDecl, ArgTypes, PAL);
}
/***/
CGCallInfo::CGCallInfo(QualType _ResultType, const CallArgList &_Args)
: ResultType(_ResultType),
Args(_Args) {
ArgTypes.push_back(ResultType);
for (CallArgList::const_iterator i = Args.begin(), e = Args.end(); i!=e; ++i)
ArgTypes.push_back(i->second);
}
void CGCallInfo::constructParamAttrList(ParamAttrListType &PAL) const {
// FIXME: Provide TargetDecl so nounwind, noreturn, etc, etc get set.
constructParamAttrListInternal(0, ArgTypes, PAL);
}
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