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llvm-project/clang/Driver/ASTConsumers.cpp

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//===--- ASTConsumers.cpp - ASTConsumer implementations -------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// AST Consumer Implementations.
//
//===----------------------------------------------------------------------===//
#include "ASTConsumers.h"
#include "clang/AST/TranslationUnit.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/FileManager.h"
#include "clang/AST/AST.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/CFG.h"
#include "clang/Analysis/Analyses/LiveVariables.h"
#include "clang/Analysis/Analyses/GRSimpleVals.h"
#include "clang/Analysis/LocalCheckers.h"
#include "llvm/Support/Streams.h"
#include "llvm/Support/Timer.h"
using namespace clang;
//===----------------------------------------------------------------------===//
/// DeclPrinter - Utility class for printing top-level decls.
namespace {
class DeclPrinter {
public:
std::ostream& Out;
DeclPrinter(std::ostream* out) : Out(out ? *out : *llvm::cerr.stream()) {}
DeclPrinter() : Out(*llvm::cerr.stream()) {}
void PrintDecl(Decl *D);
void PrintFunctionDeclStart(FunctionDecl *FD);
void PrintTypeDefDecl(TypedefDecl *TD);
void PrintLinkageSpec(LinkageSpecDecl *LS);
void PrintObjCMethodDecl(ObjCMethodDecl *OMD);
void PrintObjCImplementationDecl(ObjCImplementationDecl *OID);
void PrintObjCInterfaceDecl(ObjCInterfaceDecl *OID);
void PrintObjCProtocolDecl(ObjCProtocolDecl *PID);
void PrintObjCCategoryImplDecl(ObjCCategoryImplDecl *PID);
void PrintObjCCategoryDecl(ObjCCategoryDecl *PID);
void PrintObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID);
};
} // end anonymous namespace
void DeclPrinter:: PrintDecl(Decl *D) {
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
PrintFunctionDeclStart(FD);
if (FD->getBody()) {
Out << ' ';
FD->getBody()->printPretty(Out);
Out << '\n';
}
} else if (isa<ObjCMethodDecl>(D)) {
// Do nothing, methods definitions are printed in
// PrintObjCImplementationDecl.
} else if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) {
PrintTypeDefDecl(TD);
} else if (ObjCInterfaceDecl *OID = dyn_cast<ObjCInterfaceDecl>(D)) {
PrintObjCInterfaceDecl(OID);
} else if (ObjCProtocolDecl *PID = dyn_cast<ObjCProtocolDecl>(D)) {
PrintObjCProtocolDecl(PID);
} else if (ObjCForwardProtocolDecl *OFPD =
dyn_cast<ObjCForwardProtocolDecl>(D)) {
Out << "@protocol ";
for (unsigned i = 0, e = OFPD->getNumForwardDecls(); i != e; ++i) {
const ObjCProtocolDecl *D = OFPD->getForwardProtocolDecl(i);
if (i) Out << ", ";
Out << D->getName();
}
Out << ";\n";
} else if (ObjCImplementationDecl *OID =
dyn_cast<ObjCImplementationDecl>(D)) {
PrintObjCImplementationDecl(OID);
} else if (ObjCCategoryImplDecl *OID =
dyn_cast<ObjCCategoryImplDecl>(D)) {
PrintObjCCategoryImplDecl(OID);
} else if (ObjCCategoryDecl *OID =
dyn_cast<ObjCCategoryDecl>(D)) {
PrintObjCCategoryDecl(OID);
} else if (ObjCCompatibleAliasDecl *OID =
dyn_cast<ObjCCompatibleAliasDecl>(D)) {
PrintObjCCompatibleAliasDecl(OID);
} else if (isa<ObjCClassDecl>(D)) {
Out << "@class [printing todo]\n";
} else if (TagDecl *TD = dyn_cast<TagDecl>(D)) {
Out << "Read top-level tag decl: '" << TD->getName() << "'\n";
} else if (ScopedDecl *SD = dyn_cast<ScopedDecl>(D)) {
Out << "Read top-level variable decl: '" << SD->getName() << "'\n";
} else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
PrintLinkageSpec(LSD);
} else if (FileScopeAsmDecl *AD = dyn_cast<FileScopeAsmDecl>(D)) {
Out << "asm(";
AD->getAsmString()->printPretty(Out);
Out << ")\n";
} else {
assert(0 && "Unknown decl type!");
}
}
void DeclPrinter::PrintFunctionDeclStart(FunctionDecl *FD) {
bool HasBody = FD->getBody();
Out << '\n';
switch (FD->getStorageClass()) {
default: assert(0 && "Unknown storage class");
case FunctionDecl::None: break;
case FunctionDecl::Extern: Out << "extern "; break;
case FunctionDecl::Static: Out << "static "; break;
}
if (FD->isInline())
Out << "inline ";
std::string Proto = FD->getName();
const FunctionType *AFT = FD->getType()->getAsFunctionType();
if (const FunctionTypeProto *FT = dyn_cast<FunctionTypeProto>(AFT)) {
Proto += "(";
for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) {
if (i) Proto += ", ";
std::string ParamStr;
if (HasBody) ParamStr = FD->getParamDecl(i)->getName();
FT->getArgType(i).getAsStringInternal(ParamStr);
Proto += ParamStr;
}
if (FT->isVariadic()) {
if (FD->getNumParams()) Proto += ", ";
Proto += "...";
}
Proto += ")";
} else {
assert(isa<FunctionTypeNoProto>(AFT));
Proto += "()";
}
AFT->getResultType().getAsStringInternal(Proto);
Out << Proto;
if (!FD->getBody())
Out << ";\n";
// Doesn't print the body.
}
void DeclPrinter::PrintTypeDefDecl(TypedefDecl *TD) {
std::string S = TD->getName();
TD->getUnderlyingType().getAsStringInternal(S);
Out << "typedef " << S << ";\n";
}
void DeclPrinter::PrintLinkageSpec(LinkageSpecDecl *LS) {
const char *l;
if (LS->getLanguage() == LinkageSpecDecl::lang_c)
l = "C";
else if (LS->getLanguage() == LinkageSpecDecl::lang_cxx)
l = "C++";
else assert(0 && "unknown language in linkage specification");
Out << "extern \"" << l << "\" { ";
PrintDecl(LS->getDecl());
Out << "}\n";
}
void DeclPrinter::PrintObjCMethodDecl(ObjCMethodDecl *OMD) {
if (OMD->isInstance())
Out << "\n- ";
else
Out << "\n+ ";
if (!OMD->getResultType().isNull())
Out << '(' << OMD->getResultType().getAsString() << ") ";
// FIXME: just print original selector name!
Out << OMD->getSelector().getName();
for (int i = 0; i < OMD->getNumParams(); i++) {
ParmVarDecl *PDecl = OMD->getParamDecl(i);
// FIXME: selector is missing here!
Out << " :(" << PDecl->getType().getAsString() << ") " << PDecl->getName();
}
}
void DeclPrinter::PrintObjCImplementationDecl(ObjCImplementationDecl *OID) {
std::string I = OID->getName();
ObjCInterfaceDecl *SID = OID->getSuperClass();
if (SID)
Out << "@implementation " << I << " : " << SID->getName();
else
Out << "@implementation " << I;
for (ObjCImplementationDecl::instmeth_iterator I = OID->instmeth_begin(),
E = OID->instmeth_end(); I != E; ++I) {
ObjCMethodDecl *OMD = *I;
PrintObjCMethodDecl(OMD);
if (OMD->getBody()) {
Out << ' ';
OMD->getBody()->printPretty(Out);
Out << '\n';
}
}
for (ObjCImplementationDecl::classmeth_iterator I = OID->classmeth_begin(),
E = OID->classmeth_end(); I != E; ++I) {
ObjCMethodDecl *OMD = *I;
PrintObjCMethodDecl(OMD);
if (OMD->getBody()) {
Out << ' ';
OMD->getBody()->printPretty(Out);
Out << '\n';
}
}
Out << "@end\n";
}
void DeclPrinter::PrintObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
std::string I = OID->getName();
ObjCInterfaceDecl *SID = OID->getSuperClass();
if (SID)
Out << "@interface " << I << " : " << SID->getName();
else
Out << "@interface " << I;
// Protocols?
int count = OID->getNumIntfRefProtocols();
if (count > 0) {
ObjCProtocolDecl **refProtocols = OID->getReferencedProtocols();
for (int i = 0; i < count; i++)
Out << (i == 0 ? '<' : ',') << refProtocols[i]->getName();
}
if (count > 0)
Out << ">\n";
else
Out << '\n';
if (OID->getNumInstanceVariables() > 0) {
Out << '{';
for (ObjCInterfaceDecl::ivar_iterator I = OID->ivar_begin(),
E = OID->ivar_end(); I != E; ++I) {
Out << '\t' << (*I)->getType().getAsString()
<< ' ' << (*I)->getName() << ";\n";
}
Out << "}\n";
}
int NumProperties = OID->getNumPropertyDecl();
if (NumProperties > 0) {
for (int i = 0; i < NumProperties; i++) {
ObjCPropertyDecl *PDecl = OID->getPropertyDecl()[i];
Out << "@property";
if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
bool first = true;
Out << " (";
if (PDecl->getPropertyAttributes() &
ObjCPropertyDecl::OBJC_PR_readonly) {
Out << (first ? ' ' : ',') << "readonly";
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
Out << (first ? ' ' : ',') << "getter = "
<< PDecl->getGetterName()->getName();
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
Out << (first ? ' ' : ',') << "setter = "
<< PDecl->getSetterName()->getName();
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
Out << (first ? ' ' : ',') << "assign";
first = false;
}
if (PDecl->getPropertyAttributes() &
ObjCPropertyDecl::OBJC_PR_readwrite) {
Out << (first ? ' ' : ',') << "readwrite";
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
Out << (first ? ' ' : ',') << "retain";
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
Out << (first ? ' ' : ',') << "copy";
first = false;
}
if (PDecl->getPropertyAttributes() &
ObjCPropertyDecl::OBJC_PR_nonatomic) {
Out << (first ? ' ' : ',') << "nonatomic";
first = false;
}
Out << " )";
}
ObjCIvarDecl **IDecl = PDecl->getPropertyDecls();
Out << ' ' << IDecl[0]->getType().getAsString()
<< ' ' << IDecl[0]->getName();
for (int j = 1; j < PDecl->getNumPropertyDecls(); j++)
Out << ", " << IDecl[j]->getName();
Out << ";\n";
}
}
Out << "@end\n";
// FIXME: implement the rest...
}
void DeclPrinter::PrintObjCProtocolDecl(ObjCProtocolDecl *PID) {
Out << "@protocol " << PID->getName() << '\n';
// FIXME: implement the rest...
}
void DeclPrinter::PrintObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
Out << "@implementation "
<< PID->getClassInterface()->getName()
<< '(' << PID->getName() << ");\n";
// FIXME: implement the rest...
}
void DeclPrinter::PrintObjCCategoryDecl(ObjCCategoryDecl *PID) {
Out << "@interface "
<< PID->getClassInterface()->getName()
<< '(' << PID->getName() << ");\n";
// FIXME: implement the rest...
}
void DeclPrinter::PrintObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
Out << "@compatibility_alias " << AID->getName()
<< ' ' << AID->getClassInterface()->getName() << ";\n";
}
//===----------------------------------------------------------------------===//
/// ASTPrinter - Pretty-printer of ASTs
namespace {
class ASTPrinter : public ASTConsumer, public DeclPrinter {
public:
ASTPrinter(std::ostream* o = NULL) : DeclPrinter(o) {}
virtual void HandleTopLevelDecl(Decl *D) {
PrintDecl(D);
}
};
}
ASTConsumer *clang::CreateASTPrinter(std::ostream* out) {
return new ASTPrinter(out);
}
//===----------------------------------------------------------------------===//
/// ASTDumper - Low-level dumper of ASTs
namespace {
class ASTDumper : public ASTConsumer, public DeclPrinter {
SourceManager *SM;
public:
ASTDumper() : DeclPrinter() {}
void Initialize(ASTContext &Context) {
SM = &Context.getSourceManager();
}
virtual void HandleTopLevelDecl(Decl *D) {
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
PrintFunctionDeclStart(FD);
if (FD->getBody()) {
Out << '\n';
// FIXME: convert dumper to use std::ostream?
FD->getBody()->dumpAll(*SM);
Out << '\n';
}
} else if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) {
PrintTypeDefDecl(TD);
} else if (ScopedDecl *SD = dyn_cast<ScopedDecl>(D)) {
Out << "Read top-level variable decl: '" << SD->getName() << "'\n";
} else if (ObjCInterfaceDecl *OID = dyn_cast<ObjCInterfaceDecl>(D)) {
Out << "Read objc interface '" << OID->getName() << "'\n";
} else if (ObjCProtocolDecl *OPD = dyn_cast<ObjCProtocolDecl>(D)) {
Out << "Read objc protocol '" << OPD->getName() << "'\n";
} else if (ObjCCategoryDecl *OCD = dyn_cast<ObjCCategoryDecl>(D)) {
Out << "Read objc category '" << OCD->getName() << "'\n";
} else if (isa<ObjCForwardProtocolDecl>(D)) {
Out << "Read objc fwd protocol decl\n";
} else if (isa<ObjCClassDecl>(D)) {
Out << "Read objc fwd class decl\n";
} else if (isa<FileScopeAsmDecl>(D)) {
Out << "Read file scope asm decl\n";
} else {
assert(0 && "Unknown decl type!");
}
}
};
}
ASTConsumer *clang::CreateASTDumper() { return new ASTDumper(); }
//===----------------------------------------------------------------------===//
/// ASTViewer - AST Visualization
namespace {
class ASTViewer : public ASTConsumer {
SourceManager *SM;
public:
void Initialize(ASTContext &Context) {
SM = &Context.getSourceManager();
}
virtual void HandleTopLevelDecl(Decl *D) {
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
DeclPrinter().PrintFunctionDeclStart(FD);
if (FD->getBody()) {
llvm::cerr << '\n';
FD->getBody()->viewAST();
llvm::cerr << '\n';
}
}
}
};
}
ASTConsumer *clang::CreateASTViewer() { return new ASTViewer(); }
//===----------------------------------------------------------------------===//
// CFGVisitor & VisitCFGs - Boilerplate interface and logic to visit
// the CFGs for all function definitions.
namespace {
class CFGVisitor : public ASTConsumer {
std::string FName;
public:
CFGVisitor(const std::string& fname) : FName(fname) {}
CFGVisitor() : FName("") {}
// CFG Visitor interface to be implemented by subclass.
virtual void VisitCFG(CFG& C, FunctionDecl& FD) = 0;
virtual bool printFuncDeclStart() { return true; }
virtual void HandleTopLevelDecl(Decl *D);
};
} // end anonymous namespace
void CFGVisitor::HandleTopLevelDecl(Decl *D) {
FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
if (!FD || !FD->getBody())
return;
if (FName.size() > 0 && FName != FD->getIdentifier()->getName())
return;
if (printFuncDeclStart()) {
DeclPrinter().PrintFunctionDeclStart(FD);
llvm::cerr << '\n';
}
CFG *C = CFG::buildCFG(FD->getBody());
VisitCFG(*C, *FD);
delete C;
}
//===----------------------------------------------------------------------===//
// DumpCFGs - Dump CFGs to stderr or visualize with Graphviz
namespace {
class CFGDumper : public CFGVisitor {
const bool UseGraphviz;
public:
CFGDumper(bool use_graphviz, const std::string& fname)
: CFGVisitor(fname), UseGraphviz(use_graphviz) {}
virtual void VisitCFG(CFG& C, FunctionDecl&) {
if (UseGraphviz)
C.viewCFG();
else
C.dump();
}
};
} // end anonymous namespace
ASTConsumer *clang::CreateCFGDumper(bool ViewGraphs, const std::string& FName) {
return new CFGDumper(ViewGraphs, FName);
}
//===----------------------------------------------------------------------===//
// AnalyzeLiveVariables - perform live variable analysis and dump results
namespace {
class LivenessVisitor : public CFGVisitor {
SourceManager *SM;
public:
LivenessVisitor(const std::string& fname) : CFGVisitor(fname) {}
virtual void Initialize(ASTContext &Context) {
SM = &Context.getSourceManager();
}
virtual void VisitCFG(CFG& C, FunctionDecl& FD) {
LiveVariables L(C, FD);
L.runOnCFG(C);
L.dumpBlockLiveness(*SM);
}
};
} // end anonymous namespace
ASTConsumer *clang::CreateLiveVarAnalyzer(const std::string& fname) {
return new LivenessVisitor(fname);
}
//===----------------------------------------------------------------------===//
// DeadStores - run checker to locate dead stores in a function
namespace {
class DeadStoreVisitor : public CFGVisitor {
Diagnostic &Diags;
ASTContext *Ctx;
public:
DeadStoreVisitor(Diagnostic &diags) : Diags(diags) {}
virtual void Initialize(ASTContext &Context) {
Ctx = &Context;
}
virtual void VisitCFG(CFG& C, FunctionDecl& FD) {
CheckDeadStores(C, FD, *Ctx, Diags);
}
virtual bool printFuncDeclStart() { return false; }
};
} // end anonymous namespace
ASTConsumer *clang::CreateDeadStoreChecker(Diagnostic &Diags) {
return new DeadStoreVisitor(Diags);
}
//===----------------------------------------------------------------------===//
// Unitialized Values - run checker to flag potential uses of uninitalized
// variables.
namespace {
class UninitValsVisitor : public CFGVisitor {
Diagnostic &Diags;
ASTContext *Ctx;
public:
UninitValsVisitor(Diagnostic &diags) : Diags(diags) {}
virtual void Initialize(ASTContext &Context) {
Ctx = &Context;
}
virtual void VisitCFG(CFG& C, FunctionDecl&) {
CheckUninitializedValues(C, *Ctx, Diags);
}
virtual bool printFuncDeclStart() { return false; }
};
} // end anonymous namespace
ASTConsumer *clang::CreateUnitValsChecker(Diagnostic &Diags) {
return new UninitValsVisitor(Diags);
}
//===----------------------------------------------------------------------===//
// GRSimpleVals - Perform intra-procedural, path-sensitive constant propagation.
namespace {
class GRSimpleValsVisitor : public CFGVisitor {
Diagnostic &Diags;
ASTContext* Ctx;
bool Visualize;
public:
GRSimpleValsVisitor(Diagnostic &diags, const std::string& fname,
bool visualize)
: CFGVisitor(fname), Diags(diags), Visualize(visualize) {}
virtual void Initialize(ASTContext &Context) { Ctx = &Context; }
virtual void VisitCFG(CFG& C, FunctionDecl&);
virtual bool printFuncDeclStart() { return false; }
};
} // end anonymous namespace
ASTConsumer* clang::CreateGRSimpleVals(Diagnostic &Diags,
const std::string& FunctionName,
bool Visualize) {
return new GRSimpleValsVisitor(Diags, FunctionName, Visualize);
}
void GRSimpleValsVisitor::VisitCFG(CFG& C, FunctionDecl& FD) {
SourceLocation Loc = FD.getLocation();
if (!Loc.isFileID() ||
Loc.getFileID() != Ctx->getSourceManager().getMainFileID())
return;
if (!Visualize) {
llvm::cerr << "ANALYZE: " << FD.getIdentifier()->getName() << ' '
<< Ctx->getSourceManager().getSourceName(FD.getLocation())
<< ' ';
llvm::Timer T("GRSimpleVals");
T.startTimer();
unsigned size = RunGRSimpleVals(C, FD, *Ctx, Diags, Visualize);
T.stopTimer();
llvm::cerr << size << ' ' << T.getWallTime() << '\n';
}
else {
llvm::cerr << '\n';
RunGRSimpleVals(C, FD, *Ctx, Diags, Visualize);
}
}
//===----------------------------------------------------------------------===//
// AST Serializer
namespace {
class ASTSerializer : public ASTConsumer {
protected:
Diagnostic &Diags;
TranslationUnit TU;
public:
ASTSerializer(Diagnostic& diags, const LangOptions& LO)
: Diags(diags), TU(LO) {}
virtual void Initialize(ASTContext &Context) {
TU.setContext(&Context);
}
virtual void HandleTopLevelDecl(Decl *D) {
if (Diags.hasErrorOccurred())
return;
TU.AddTopLevelDecl(D);
}
};
class SingleFileSerializer : public ASTSerializer {
const llvm::sys::Path FName;
public:
SingleFileSerializer(const llvm::sys::Path& F, Diagnostic &diags,
const LangOptions &LO)
: ASTSerializer(diags,LO), FName(F) {}
~SingleFileSerializer() {
EmitASTBitcodeFile(TU,FName);
}
};
class BuildSerializer : public ASTSerializer {
llvm::sys::Path EmitDir;
public:
BuildSerializer(const llvm::sys::Path& dir, Diagnostic &diags,
const LangOptions &LO)
: ASTSerializer(diags,LO), EmitDir(dir) {}
~BuildSerializer() {
SourceManager& SourceMgr = TU.getASTContext()->getSourceManager();
unsigned ID = SourceMgr.getMainFileID();
assert (ID && "MainFileID not set!");
const FileEntry* FE = SourceMgr.getFileEntryForID(ID);
assert (FE && "No FileEntry for main file.");
// FIXME: This is not portable to Windows.
// FIXME: This logic should probably be moved elsewhere later.
llvm::sys::Path FName(EmitDir);
std::vector<char> buf;
buf.reserve(strlen(FE->getName())+100);
sprintf(&buf[0], "dev_%llx", (uint64_t) FE->getDevice());
FName.appendComponent(&buf[0]);
FName.createDirectoryOnDisk(true);
if (!FName.canWrite() || !FName.isDirectory()) {
assert (false && "Could not create 'device' serialization directory.");
return;
}
sprintf(&buf[0], "%s-%llX.ast", FE->getName(), (uint64_t) FE->getInode());
FName.appendComponent(&buf[0]);
EmitASTBitcodeFile(TU,FName);
// Now emit the sources.
}
};
} // end anonymous namespace
ASTConsumer* clang::CreateASTSerializer(const std::string& InFile,
const std::string& OutputFile,
Diagnostic &Diags,
const LangOptions &Features) {
if (OutputFile.size()) {
if (InFile == "-") {
llvm::cerr <<
"error: Cannot use --serialize with -o for source read from STDIN.\n";
return NULL;
}
// The user specified an AST-emission directory. Determine if the path
// is absolute.
llvm::sys::Path EmitDir(OutputFile);
if (!EmitDir.isAbsolute()) {
llvm::cerr <<
"error: Output directory for --serialize must be an absolute path.\n";
return NULL;
}
// Create the directory if it does not exist.
EmitDir.createDirectoryOnDisk(true);
if (!EmitDir.canWrite() || !EmitDir.isDirectory()) {
llvm::cerr <<
"error: Could not create output directory for --serialize.\n";
return NULL;
}
// FIXME: We should probably only allow using BuildSerializer when
// the ASTs come from parsed source files, and not from .ast files.
return new BuildSerializer(EmitDir, Diags, Features);
}
// The user did not specify an output directory for serialized ASTs.
// Serialize the translation to a single file whose name is the same
// as the input file with the ".ast" extension appended.
llvm::sys::Path FName(InFile.c_str());
FName.appendSuffix("ast");
return new SingleFileSerializer(FName, Diags, Features);
}
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