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//===----------------------------------------------------------------------===//
//
// Copyright (c) 2012, 2013, 2015 The University of Utah
// All rights reserved.
//
// This file is distributed under the University of Illinois Open Source
// License. See the file COPYING for details.
//
//===----------------------------------------------------------------------===//
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include "ReplaceOneLevelTypedefType.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/AST/ASTContext.h"
#include "clang/Basic/SourceManager.h"
#include "TransformationManager.h"
using namespace clang;
using namespace llvm;
static const char *DescriptionMsg =
"This pass literally replaces a typedef type with the underlying type \
if typedef type is only been used once. It doesn't recursively resolve \
the underlying type.";
static RegisterTransformation<ReplaceOneLevelTypedefType>
Trans("replace-one-level-typedef-type", DescriptionMsg);
class ReplaceOneLevelTypedefTypeCollectionVisitor : public
RecursiveASTVisitor<ReplaceOneLevelTypedefTypeCollectionVisitor> {
public:
explicit ReplaceOneLevelTypedefTypeCollectionVisitor(
ReplaceOneLevelTypedefType *Instance)
: ConsumerInstance(Instance)
{ }
bool VisitTypedefTypeLoc(TypedefTypeLoc TLoc);
private:
ReplaceOneLevelTypedefType *ConsumerInstance;
};
bool ReplaceOneLevelTypedefTypeCollectionVisitor::VisitTypedefTypeLoc(
TypedefTypeLoc TLoc)
{
ConsumerInstance->handleOneTypedefTypeLoc(TLoc);
return true;
}
void ReplaceOneLevelTypedefType::Initialize(ASTContext &context)
{
Transformation::Initialize(context);
CollectionVisitor = new ReplaceOneLevelTypedefTypeCollectionVisitor(this);
}
void ReplaceOneLevelTypedefType::HandleTranslationUnit(ASTContext &Ctx)
{
CollectionVisitor->TraverseDecl(Ctx.getTranslationUnitDecl());
analyzeTypeLocs();
if (QueryInstanceOnly)
return;
if (TransformationCounter > ValidInstanceNum) {
TransError = TransMaxInstanceError;
return;
}
Ctx.getDiagnostics().setSuppressAllDiagnostics(false);
TransAssert(TheTypedefDecl && "NULL TheTypedefDecl!");
rewriteTypedefType();
removeTypedefs();
if (Ctx.getDiagnostics().hasErrorOccurred() ||
Ctx.getDiagnostics().hasFatalErrorOccurred())
TransError = TransInternalError;
}
void ReplaceOneLevelTypedefType::analyzeTypeLocs()
{
for (TypedefDeclToRefMap::iterator I = AllTypeDecls.begin(),
E = AllTypeDecls.end(); I != E; ++I) {
TypedefTypeLocVector *LocVec = (*I).second;
if (LocVec->size() > 1)
continue;
ValidInstanceNum++;
if (ValidInstanceNum == TransformationCounter) {
TheTypedefDecl = (*I).first;
TheTypeLoc = LocVec->back();
}
}
}
void ReplaceOneLevelTypedefType::rewriteTypedefType()
{
std::string NewTyStr;
TheTypedefDecl->getUnderlyingType().getAsStringInternal(NewTyStr,
Context->getPrintingPolicy());
SourceRange Range = TheTypeLoc.getSourceRange();
TheRewriter.ReplaceText(Range, NewTyStr);
}
void ReplaceOneLevelTypedefType::removeTypedefs()
{
for (TypedefDecl::redecl_iterator I = TheTypedefDecl->redecls_begin(),
E = TheTypedefDecl->redecls_end(); I != E; ++I) {
SourceRange Range = (*I)->getSourceRange();
if (Range.isValid()) {
RewriteHelper->removeTextUntil(Range, ';');
Rewritten = true;
}
}
}
void ReplaceOneLevelTypedefType::handleOneTypedefTypeLoc(TypedefTypeLoc TLoc)
{
if (isInIncludedFile(TLoc.getBeginLoc()))
return;
const TypedefType *TdefTy = TLoc.getTypePtr();
const TypedefDecl *TdefD = dyn_cast<TypedefDecl>(TdefTy->getDecl());
if (!TdefD || TdefD->getLocStart().isInvalid())
return;
const TypedefDecl *CanonicalD =
dyn_cast<TypedefDecl>(TdefD->getCanonicalDecl());
TypedefTypeLocVector *LocVec = AllTypeDecls[CanonicalD];
if (!LocVec) {
LocVec = new TypedefTypeLocVector();
TransAssert(LocVec && "NULL LocVec!");
AllTypeDecls[CanonicalD] = LocVec;
}
LocVec->push_back(TLoc);
}
ReplaceOneLevelTypedefType::~ReplaceOneLevelTypedefType(void)
{
for (TypedefDeclToRefMap::iterator I = AllTypeDecls.begin(),
E = AllTypeDecls.end(); I != E; ++I) {
delete (*I).second;
}
delete CollectionVisitor;
}
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