Check in LLVM r95781.
diff --git a/lib/Frontend/PCHWriter.cpp b/lib/Frontend/PCHWriter.cpp
new file mode 100644
index 0000000..45d9b1b
--- /dev/null
+++ b/lib/Frontend/PCHWriter.cpp
@@ -0,0 +1,2324 @@
+//===--- PCHWriter.h - Precompiled Headers Writer ---------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the PCHWriter class, which writes a precompiled header.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/PCHWriter.h"
+#include "../Sema/Sema.h" // FIXME: move header into include/clang/Sema
+#include "../Sema/IdentifierResolver.h" // FIXME: move header
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclContextInternals.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/Type.h"
+#include "clang/AST/TypeLocVisitor.h"
+#include "clang/Lex/MacroInfo.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Lex/HeaderSearch.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/OnDiskHashTable.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/SourceManagerInternals.h"
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Basic/Version.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/APInt.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Bitcode/BitstreamWriter.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/System/Path.h"
+#include <cstdio>
+using namespace clang;
+
+//===----------------------------------------------------------------------===//
+// Type serialization
+//===----------------------------------------------------------------------===//
+
+namespace {
+ class PCHTypeWriter {
+ PCHWriter &Writer;
+ PCHWriter::RecordData &Record;
+
+ public:
+ /// \brief Type code that corresponds to the record generated.
+ pch::TypeCode Code;
+
+ PCHTypeWriter(PCHWriter &Writer, PCHWriter::RecordData &Record)
+ : Writer(Writer), Record(Record), Code(pch::TYPE_EXT_QUAL) { }
+
+ void VisitArrayType(const ArrayType *T);
+ void VisitFunctionType(const FunctionType *T);
+ void VisitTagType(const TagType *T);
+
+#define TYPE(Class, Base) void Visit##Class##Type(const Class##Type *T);
+#define ABSTRACT_TYPE(Class, Base)
+#define DEPENDENT_TYPE(Class, Base)
+#include "clang/AST/TypeNodes.def"
+ };
+}
+
+void PCHTypeWriter::VisitBuiltinType(const BuiltinType *T) {
+ assert(false && "Built-in types are never serialized");
+}
+
+void PCHTypeWriter::VisitComplexType(const ComplexType *T) {
+ Writer.AddTypeRef(T->getElementType(), Record);
+ Code = pch::TYPE_COMPLEX;
+}
+
+void PCHTypeWriter::VisitPointerType(const PointerType *T) {
+ Writer.AddTypeRef(T->getPointeeType(), Record);
+ Code = pch::TYPE_POINTER;
+}
+
+void PCHTypeWriter::VisitBlockPointerType(const BlockPointerType *T) {
+ Writer.AddTypeRef(T->getPointeeType(), Record);
+ Code = pch::TYPE_BLOCK_POINTER;
+}
+
+void PCHTypeWriter::VisitLValueReferenceType(const LValueReferenceType *T) {
+ Writer.AddTypeRef(T->getPointeeType(), Record);
+ Code = pch::TYPE_LVALUE_REFERENCE;
+}
+
+void PCHTypeWriter::VisitRValueReferenceType(const RValueReferenceType *T) {
+ Writer.AddTypeRef(T->getPointeeType(), Record);
+ Code = pch::TYPE_RVALUE_REFERENCE;
+}
+
+void PCHTypeWriter::VisitMemberPointerType(const MemberPointerType *T) {
+ Writer.AddTypeRef(T->getPointeeType(), Record);
+ Writer.AddTypeRef(QualType(T->getClass(), 0), Record);
+ Code = pch::TYPE_MEMBER_POINTER;
+}
+
+void PCHTypeWriter::VisitArrayType(const ArrayType *T) {
+ Writer.AddTypeRef(T->getElementType(), Record);
+ Record.push_back(T->getSizeModifier()); // FIXME: stable values
+ Record.push_back(T->getIndexTypeCVRQualifiers()); // FIXME: stable values
+}
+
+void PCHTypeWriter::VisitConstantArrayType(const ConstantArrayType *T) {
+ VisitArrayType(T);
+ Writer.AddAPInt(T->getSize(), Record);
+ Code = pch::TYPE_CONSTANT_ARRAY;
+}
+
+void PCHTypeWriter::VisitIncompleteArrayType(const IncompleteArrayType *T) {
+ VisitArrayType(T);
+ Code = pch::TYPE_INCOMPLETE_ARRAY;
+}
+
+void PCHTypeWriter::VisitVariableArrayType(const VariableArrayType *T) {
+ VisitArrayType(T);
+ Writer.AddSourceLocation(T->getLBracketLoc(), Record);
+ Writer.AddSourceLocation(T->getRBracketLoc(), Record);
+ Writer.AddStmt(T->getSizeExpr());
+ Code = pch::TYPE_VARIABLE_ARRAY;
+}
+
+void PCHTypeWriter::VisitVectorType(const VectorType *T) {
+ Writer.AddTypeRef(T->getElementType(), Record);
+ Record.push_back(T->getNumElements());
+ Record.push_back(T->isAltiVec());
+ Record.push_back(T->isPixel());
+ Code = pch::TYPE_VECTOR;
+}
+
+void PCHTypeWriter::VisitExtVectorType(const ExtVectorType *T) {
+ VisitVectorType(T);
+ Code = pch::TYPE_EXT_VECTOR;
+}
+
+void PCHTypeWriter::VisitFunctionType(const FunctionType *T) {
+ Writer.AddTypeRef(T->getResultType(), Record);
+ Record.push_back(T->getNoReturnAttr());
+ // FIXME: need to stabilize encoding of calling convention...
+ Record.push_back(T->getCallConv());
+}
+
+void PCHTypeWriter::VisitFunctionNoProtoType(const FunctionNoProtoType *T) {
+ VisitFunctionType(T);
+ Code = pch::TYPE_FUNCTION_NO_PROTO;
+}
+
+void PCHTypeWriter::VisitFunctionProtoType(const FunctionProtoType *T) {
+ VisitFunctionType(T);
+ Record.push_back(T->getNumArgs());
+ for (unsigned I = 0, N = T->getNumArgs(); I != N; ++I)
+ Writer.AddTypeRef(T->getArgType(I), Record);
+ Record.push_back(T->isVariadic());
+ Record.push_back(T->getTypeQuals());
+ Record.push_back(T->hasExceptionSpec());
+ Record.push_back(T->hasAnyExceptionSpec());
+ Record.push_back(T->getNumExceptions());
+ for (unsigned I = 0, N = T->getNumExceptions(); I != N; ++I)
+ Writer.AddTypeRef(T->getExceptionType(I), Record);
+ Code = pch::TYPE_FUNCTION_PROTO;
+}
+
+#if 0
+// For when we want it....
+void PCHTypeWriter::VisitUnresolvedUsingType(const UnresolvedUsingType *T) {
+ Writer.AddDeclRef(T->getDecl(), Record);
+ Code = pch::TYPE_UNRESOLVED_USING;
+}
+#endif
+
+void PCHTypeWriter::VisitTypedefType(const TypedefType *T) {
+ Writer.AddDeclRef(T->getDecl(), Record);
+ Code = pch::TYPE_TYPEDEF;
+}
+
+void PCHTypeWriter::VisitTypeOfExprType(const TypeOfExprType *T) {
+ Writer.AddStmt(T->getUnderlyingExpr());
+ Code = pch::TYPE_TYPEOF_EXPR;
+}
+
+void PCHTypeWriter::VisitTypeOfType(const TypeOfType *T) {
+ Writer.AddTypeRef(T->getUnderlyingType(), Record);
+ Code = pch::TYPE_TYPEOF;
+}
+
+void PCHTypeWriter::VisitDecltypeType(const DecltypeType *T) {
+ Writer.AddStmt(T->getUnderlyingExpr());
+ Code = pch::TYPE_DECLTYPE;
+}
+
+void PCHTypeWriter::VisitTagType(const TagType *T) {
+ Writer.AddDeclRef(T->getDecl(), Record);
+ assert(!T->isBeingDefined() &&
+ "Cannot serialize in the middle of a type definition");
+}
+
+void PCHTypeWriter::VisitRecordType(const RecordType *T) {
+ VisitTagType(T);
+ Code = pch::TYPE_RECORD;
+}
+
+void PCHTypeWriter::VisitEnumType(const EnumType *T) {
+ VisitTagType(T);
+ Code = pch::TYPE_ENUM;
+}
+
+void PCHTypeWriter::VisitElaboratedType(const ElaboratedType *T) {
+ Writer.AddTypeRef(T->getUnderlyingType(), Record);
+ Record.push_back(T->getTagKind());
+ Code = pch::TYPE_ELABORATED;
+}
+
+void
+PCHTypeWriter::VisitSubstTemplateTypeParmType(
+ const SubstTemplateTypeParmType *T) {
+ Writer.AddTypeRef(QualType(T->getReplacedParameter(), 0), Record);
+ Writer.AddTypeRef(T->getReplacementType(), Record);
+ Code = pch::TYPE_SUBST_TEMPLATE_TYPE_PARM;
+}
+
+void
+PCHTypeWriter::VisitTemplateSpecializationType(
+ const TemplateSpecializationType *T) {
+ // FIXME: Serialize this type (C++ only)
+ assert(false && "Cannot serialize template specialization types");
+}
+
+void PCHTypeWriter::VisitQualifiedNameType(const QualifiedNameType *T) {
+ // FIXME: Serialize this type (C++ only)
+ assert(false && "Cannot serialize qualified name types");
+}
+
+void PCHTypeWriter::VisitObjCInterfaceType(const ObjCInterfaceType *T) {
+ Writer.AddDeclRef(T->getDecl(), Record);
+ Record.push_back(T->getNumProtocols());
+ for (ObjCInterfaceType::qual_iterator I = T->qual_begin(),
+ E = T->qual_end(); I != E; ++I)
+ Writer.AddDeclRef(*I, Record);
+ Code = pch::TYPE_OBJC_INTERFACE;
+}
+
+void
+PCHTypeWriter::VisitObjCObjectPointerType(const ObjCObjectPointerType *T) {
+ Writer.AddTypeRef(T->getPointeeType(), Record);
+ Record.push_back(T->getNumProtocols());
+ for (ObjCInterfaceType::qual_iterator I = T->qual_begin(),
+ E = T->qual_end(); I != E; ++I)
+ Writer.AddDeclRef(*I, Record);
+ Code = pch::TYPE_OBJC_OBJECT_POINTER;
+}
+
+namespace {
+
+class TypeLocWriter : public TypeLocVisitor<TypeLocWriter> {
+ PCHWriter &Writer;
+ PCHWriter::RecordData &Record;
+
+public:
+ TypeLocWriter(PCHWriter &Writer, PCHWriter::RecordData &Record)
+ : Writer(Writer), Record(Record) { }
+
+#define ABSTRACT_TYPELOC(CLASS, PARENT)
+#define TYPELOC(CLASS, PARENT) \
+ void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc);
+#include "clang/AST/TypeLocNodes.def"
+
+ void VisitArrayTypeLoc(ArrayTypeLoc TyLoc);
+ void VisitFunctionTypeLoc(FunctionTypeLoc TyLoc);
+};
+
+}
+
+void TypeLocWriter::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
+ // nothing to do
+}
+void TypeLocWriter::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getBuiltinLoc(), Record);
+ if (TL.needsExtraLocalData()) {
+ Record.push_back(TL.getWrittenTypeSpec());
+ Record.push_back(TL.getWrittenSignSpec());
+ Record.push_back(TL.getWrittenWidthSpec());
+ Record.push_back(TL.hasModeAttr());
+ }
+}
+void TypeLocWriter::VisitComplexTypeLoc(ComplexTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitPointerTypeLoc(PointerTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getStarLoc(), Record);
+}
+void TypeLocWriter::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getCaretLoc(), Record);
+}
+void TypeLocWriter::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getAmpLoc(), Record);
+}
+void TypeLocWriter::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getAmpAmpLoc(), Record);
+}
+void TypeLocWriter::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getStarLoc(), Record);
+}
+void TypeLocWriter::VisitArrayTypeLoc(ArrayTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getLBracketLoc(), Record);
+ Writer.AddSourceLocation(TL.getRBracketLoc(), Record);
+ Record.push_back(TL.getSizeExpr() ? 1 : 0);
+ if (TL.getSizeExpr())
+ Writer.AddStmt(TL.getSizeExpr());
+}
+void TypeLocWriter::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) {
+ VisitArrayTypeLoc(TL);
+}
+void TypeLocWriter::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) {
+ VisitArrayTypeLoc(TL);
+}
+void TypeLocWriter::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) {
+ VisitArrayTypeLoc(TL);
+}
+void TypeLocWriter::VisitDependentSizedArrayTypeLoc(
+ DependentSizedArrayTypeLoc TL) {
+ VisitArrayTypeLoc(TL);
+}
+void TypeLocWriter::VisitDependentSizedExtVectorTypeLoc(
+ DependentSizedExtVectorTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitVectorTypeLoc(VectorTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getLParenLoc(), Record);
+ Writer.AddSourceLocation(TL.getRParenLoc(), Record);
+ for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
+ Writer.AddDeclRef(TL.getArg(i), Record);
+}
+void TypeLocWriter::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
+ VisitFunctionTypeLoc(TL);
+}
+void TypeLocWriter::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
+ VisitFunctionTypeLoc(TL);
+}
+void TypeLocWriter::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getTypeofLoc(), Record);
+ Writer.AddSourceLocation(TL.getLParenLoc(), Record);
+ Writer.AddSourceLocation(TL.getRParenLoc(), Record);
+}
+void TypeLocWriter::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getTypeofLoc(), Record);
+ Writer.AddSourceLocation(TL.getLParenLoc(), Record);
+ Writer.AddSourceLocation(TL.getRParenLoc(), Record);
+ Writer.AddTypeSourceInfo(TL.getUnderlyingTInfo(), Record);
+}
+void TypeLocWriter::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitRecordTypeLoc(RecordTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitEnumTypeLoc(EnumTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitSubstTemplateTypeParmTypeLoc(
+ SubstTemplateTypeParmTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitTemplateSpecializationTypeLoc(
+ TemplateSpecializationTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getTemplateNameLoc(), Record);
+ Writer.AddSourceLocation(TL.getLAngleLoc(), Record);
+ Writer.AddSourceLocation(TL.getRAngleLoc(), Record);
+ for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
+ Writer.AddTemplateArgumentLoc(TL.getArgLoc(i), Record);
+}
+void TypeLocWriter::VisitQualifiedNameTypeLoc(QualifiedNameTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitTypenameTypeLoc(TypenameTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+}
+void TypeLocWriter::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getNameLoc(), Record);
+ Writer.AddSourceLocation(TL.getLAngleLoc(), Record);
+ Writer.AddSourceLocation(TL.getRAngleLoc(), Record);
+ for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
+ Writer.AddSourceLocation(TL.getProtocolLoc(i), Record);
+}
+void TypeLocWriter::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
+ Writer.AddSourceLocation(TL.getStarLoc(), Record);
+ Writer.AddSourceLocation(TL.getLAngleLoc(), Record);
+ Writer.AddSourceLocation(TL.getRAngleLoc(), Record);
+ Record.push_back(TL.hasBaseTypeAsWritten());
+ Record.push_back(TL.hasProtocolsAsWritten());
+ if (TL.hasProtocolsAsWritten())
+ for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
+ Writer.AddSourceLocation(TL.getProtocolLoc(i), Record);
+}
+
+//===----------------------------------------------------------------------===//
+// PCHWriter Implementation
+//===----------------------------------------------------------------------===//
+
+static void EmitBlockID(unsigned ID, const char *Name,
+ llvm::BitstreamWriter &Stream,
+ PCHWriter::RecordData &Record) {
+ Record.clear();
+ Record.push_back(ID);
+ Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETBID, Record);
+
+ // Emit the block name if present.
+ if (Name == 0 || Name[0] == 0) return;
+ Record.clear();
+ while (*Name)
+ Record.push_back(*Name++);
+ Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_BLOCKNAME, Record);
+}
+
+static void EmitRecordID(unsigned ID, const char *Name,
+ llvm::BitstreamWriter &Stream,
+ PCHWriter::RecordData &Record) {
+ Record.clear();
+ Record.push_back(ID);
+ while (*Name)
+ Record.push_back(*Name++);
+ Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETRECORDNAME, Record);
+}
+
+static void AddStmtsExprs(llvm::BitstreamWriter &Stream,
+ PCHWriter::RecordData &Record) {
+#define RECORD(X) EmitRecordID(pch::X, #X, Stream, Record)
+ RECORD(STMT_STOP);
+ RECORD(STMT_NULL_PTR);
+ RECORD(STMT_NULL);
+ RECORD(STMT_COMPOUND);
+ RECORD(STMT_CASE);
+ RECORD(STMT_DEFAULT);
+ RECORD(STMT_LABEL);
+ RECORD(STMT_IF);
+ RECORD(STMT_SWITCH);
+ RECORD(STMT_WHILE);
+ RECORD(STMT_DO);
+ RECORD(STMT_FOR);
+ RECORD(STMT_GOTO);
+ RECORD(STMT_INDIRECT_GOTO);
+ RECORD(STMT_CONTINUE);
+ RECORD(STMT_BREAK);
+ RECORD(STMT_RETURN);
+ RECORD(STMT_DECL);
+ RECORD(STMT_ASM);
+ RECORD(EXPR_PREDEFINED);
+ RECORD(EXPR_DECL_REF);
+ RECORD(EXPR_INTEGER_LITERAL);
+ RECORD(EXPR_FLOATING_LITERAL);
+ RECORD(EXPR_IMAGINARY_LITERAL);
+ RECORD(EXPR_STRING_LITERAL);
+ RECORD(EXPR_CHARACTER_LITERAL);
+ RECORD(EXPR_PAREN);
+ RECORD(EXPR_UNARY_OPERATOR);
+ RECORD(EXPR_SIZEOF_ALIGN_OF);
+ RECORD(EXPR_ARRAY_SUBSCRIPT);
+ RECORD(EXPR_CALL);
+ RECORD(EXPR_MEMBER);
+ RECORD(EXPR_BINARY_OPERATOR);
+ RECORD(EXPR_COMPOUND_ASSIGN_OPERATOR);
+ RECORD(EXPR_CONDITIONAL_OPERATOR);
+ RECORD(EXPR_IMPLICIT_CAST);
+ RECORD(EXPR_CSTYLE_CAST);
+ RECORD(EXPR_COMPOUND_LITERAL);
+ RECORD(EXPR_EXT_VECTOR_ELEMENT);
+ RECORD(EXPR_INIT_LIST);
+ RECORD(EXPR_DESIGNATED_INIT);
+ RECORD(EXPR_IMPLICIT_VALUE_INIT);
+ RECORD(EXPR_VA_ARG);
+ RECORD(EXPR_ADDR_LABEL);
+ RECORD(EXPR_STMT);
+ RECORD(EXPR_TYPES_COMPATIBLE);
+ RECORD(EXPR_CHOOSE);
+ RECORD(EXPR_GNU_NULL);
+ RECORD(EXPR_SHUFFLE_VECTOR);
+ RECORD(EXPR_BLOCK);
+ RECORD(EXPR_BLOCK_DECL_REF);
+ RECORD(EXPR_OBJC_STRING_LITERAL);
+ RECORD(EXPR_OBJC_ENCODE);
+ RECORD(EXPR_OBJC_SELECTOR_EXPR);
+ RECORD(EXPR_OBJC_PROTOCOL_EXPR);
+ RECORD(EXPR_OBJC_IVAR_REF_EXPR);
+ RECORD(EXPR_OBJC_PROPERTY_REF_EXPR);
+ RECORD(EXPR_OBJC_KVC_REF_EXPR);
+ RECORD(EXPR_OBJC_MESSAGE_EXPR);
+ RECORD(EXPR_OBJC_SUPER_EXPR);
+ RECORD(STMT_OBJC_FOR_COLLECTION);
+ RECORD(STMT_OBJC_CATCH);
+ RECORD(STMT_OBJC_FINALLY);
+ RECORD(STMT_OBJC_AT_TRY);
+ RECORD(STMT_OBJC_AT_SYNCHRONIZED);
+ RECORD(STMT_OBJC_AT_THROW);
+ RECORD(EXPR_CXX_OPERATOR_CALL);
+ RECORD(EXPR_CXX_CONSTRUCT);
+ RECORD(EXPR_CXX_STATIC_CAST);
+ RECORD(EXPR_CXX_DYNAMIC_CAST);
+ RECORD(EXPR_CXX_REINTERPRET_CAST);
+ RECORD(EXPR_CXX_CONST_CAST);
+ RECORD(EXPR_CXX_FUNCTIONAL_CAST);
+ RECORD(EXPR_CXX_BOOL_LITERAL);
+ RECORD(EXPR_CXX_NULL_PTR_LITERAL);
+#undef RECORD
+}
+
+void PCHWriter::WriteBlockInfoBlock() {
+ RecordData Record;
+ Stream.EnterSubblock(llvm::bitc::BLOCKINFO_BLOCK_ID, 3);
+
+#define BLOCK(X) EmitBlockID(pch::X ## _ID, #X, Stream, Record)
+#define RECORD(X) EmitRecordID(pch::X, #X, Stream, Record)
+
+ // PCH Top-Level Block.
+ BLOCK(PCH_BLOCK);
+ RECORD(ORIGINAL_FILE_NAME);
+ RECORD(TYPE_OFFSET);
+ RECORD(DECL_OFFSET);
+ RECORD(LANGUAGE_OPTIONS);
+ RECORD(METADATA);
+ RECORD(IDENTIFIER_OFFSET);
+ RECORD(IDENTIFIER_TABLE);
+ RECORD(EXTERNAL_DEFINITIONS);
+ RECORD(SPECIAL_TYPES);
+ RECORD(STATISTICS);
+ RECORD(TENTATIVE_DEFINITIONS);
+ RECORD(LOCALLY_SCOPED_EXTERNAL_DECLS);
+ RECORD(SELECTOR_OFFSETS);
+ RECORD(METHOD_POOL);
+ RECORD(PP_COUNTER_VALUE);
+ RECORD(SOURCE_LOCATION_OFFSETS);
+ RECORD(SOURCE_LOCATION_PRELOADS);
+ RECORD(STAT_CACHE);
+ RECORD(EXT_VECTOR_DECLS);
+ RECORD(COMMENT_RANGES);
+ RECORD(VERSION_CONTROL_BRANCH_REVISION);
+
+ // SourceManager Block.
+ BLOCK(SOURCE_MANAGER_BLOCK);
+ RECORD(SM_SLOC_FILE_ENTRY);
+ RECORD(SM_SLOC_BUFFER_ENTRY);
+ RECORD(SM_SLOC_BUFFER_BLOB);
+ RECORD(SM_SLOC_INSTANTIATION_ENTRY);
+ RECORD(SM_LINE_TABLE);
+ RECORD(SM_HEADER_FILE_INFO);
+
+ // Preprocessor Block.
+ BLOCK(PREPROCESSOR_BLOCK);
+ RECORD(PP_MACRO_OBJECT_LIKE);
+ RECORD(PP_MACRO_FUNCTION_LIKE);
+ RECORD(PP_TOKEN);
+
+ // Decls and Types block.
+ BLOCK(DECLTYPES_BLOCK);
+ RECORD(TYPE_EXT_QUAL);
+ RECORD(TYPE_COMPLEX);
+ RECORD(TYPE_POINTER);
+ RECORD(TYPE_BLOCK_POINTER);
+ RECORD(TYPE_LVALUE_REFERENCE);
+ RECORD(TYPE_RVALUE_REFERENCE);
+ RECORD(TYPE_MEMBER_POINTER);
+ RECORD(TYPE_CONSTANT_ARRAY);
+ RECORD(TYPE_INCOMPLETE_ARRAY);
+ RECORD(TYPE_VARIABLE_ARRAY);
+ RECORD(TYPE_VECTOR);
+ RECORD(TYPE_EXT_VECTOR);
+ RECORD(TYPE_FUNCTION_PROTO);
+ RECORD(TYPE_FUNCTION_NO_PROTO);
+ RECORD(TYPE_TYPEDEF);
+ RECORD(TYPE_TYPEOF_EXPR);
+ RECORD(TYPE_TYPEOF);
+ RECORD(TYPE_RECORD);
+ RECORD(TYPE_ENUM);
+ RECORD(TYPE_OBJC_INTERFACE);
+ RECORD(TYPE_OBJC_OBJECT_POINTER);
+ RECORD(DECL_ATTR);
+ RECORD(DECL_TRANSLATION_UNIT);
+ RECORD(DECL_TYPEDEF);
+ RECORD(DECL_ENUM);
+ RECORD(DECL_RECORD);
+ RECORD(DECL_ENUM_CONSTANT);
+ RECORD(DECL_FUNCTION);
+ RECORD(DECL_OBJC_METHOD);
+ RECORD(DECL_OBJC_INTERFACE);
+ RECORD(DECL_OBJC_PROTOCOL);
+ RECORD(DECL_OBJC_IVAR);
+ RECORD(DECL_OBJC_AT_DEFS_FIELD);
+ RECORD(DECL_OBJC_CLASS);
+ RECORD(DECL_OBJC_FORWARD_PROTOCOL);
+ RECORD(DECL_OBJC_CATEGORY);
+ RECORD(DECL_OBJC_CATEGORY_IMPL);
+ RECORD(DECL_OBJC_IMPLEMENTATION);
+ RECORD(DECL_OBJC_COMPATIBLE_ALIAS);
+ RECORD(DECL_OBJC_PROPERTY);
+ RECORD(DECL_OBJC_PROPERTY_IMPL);
+ RECORD(DECL_FIELD);
+ RECORD(DECL_VAR);
+ RECORD(DECL_IMPLICIT_PARAM);
+ RECORD(DECL_PARM_VAR);
+ RECORD(DECL_FILE_SCOPE_ASM);
+ RECORD(DECL_BLOCK);
+ RECORD(DECL_CONTEXT_LEXICAL);
+ RECORD(DECL_CONTEXT_VISIBLE);
+ // Statements and Exprs can occur in the Decls and Types block.
+ AddStmtsExprs(Stream, Record);
+#undef RECORD
+#undef BLOCK
+ Stream.ExitBlock();
+}
+
+/// \brief Adjusts the given filename to only write out the portion of the
+/// filename that is not part of the system root directory.
+///
+/// \param Filename the file name to adjust.
+///
+/// \param isysroot When non-NULL, the PCH file is a relocatable PCH file and
+/// the returned filename will be adjusted by this system root.
+///
+/// \returns either the original filename (if it needs no adjustment) or the
+/// adjusted filename (which points into the @p Filename parameter).
+static const char *
+adjustFilenameForRelocatablePCH(const char *Filename, const char *isysroot) {
+ assert(Filename && "No file name to adjust?");
+
+ if (!isysroot)
+ return Filename;
+
+ // Verify that the filename and the system root have the same prefix.
+ unsigned Pos = 0;
+ for (; Filename[Pos] && isysroot[Pos]; ++Pos)
+ if (Filename[Pos] != isysroot[Pos])
+ return Filename; // Prefixes don't match.
+
+ // We hit the end of the filename before we hit the end of the system root.
+ if (!Filename[Pos])
+ return Filename;
+
+ // If the file name has a '/' at the current position, skip over the '/'.
+ // We distinguish sysroot-based includes from absolute includes by the
+ // absence of '/' at the beginning of sysroot-based includes.
+ if (Filename[Pos] == '/')
+ ++Pos;
+
+ return Filename + Pos;
+}
+
+/// \brief Write the PCH metadata (e.g., i686-apple-darwin9).
+void PCHWriter::WriteMetadata(ASTContext &Context, const char *isysroot) {
+ using namespace llvm;
+
+ // Metadata
+ const TargetInfo &Target = Context.Target;
+ BitCodeAbbrev *MetaAbbrev = new BitCodeAbbrev();
+ MetaAbbrev->Add(BitCodeAbbrevOp(pch::METADATA));
+ MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // PCH major
+ MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // PCH minor
+ MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang major
+ MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang minor
+ MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Relocatable
+ MetaAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Target triple
+ unsigned MetaAbbrevCode = Stream.EmitAbbrev(MetaAbbrev);
+
+ RecordData Record;
+ Record.push_back(pch::METADATA);
+ Record.push_back(pch::VERSION_MAJOR);
+ Record.push_back(pch::VERSION_MINOR);
+ Record.push_back(CLANG_VERSION_MAJOR);
+ Record.push_back(CLANG_VERSION_MINOR);
+ Record.push_back(isysroot != 0);
+ const std::string &TripleStr = Target.getTriple().getTriple();
+ Stream.EmitRecordWithBlob(MetaAbbrevCode, Record, TripleStr);
+
+ // Original file name
+ SourceManager &SM = Context.getSourceManager();
+ if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) {
+ BitCodeAbbrev *FileAbbrev = new BitCodeAbbrev();
+ FileAbbrev->Add(BitCodeAbbrevOp(pch::ORIGINAL_FILE_NAME));
+ FileAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
+ unsigned FileAbbrevCode = Stream.EmitAbbrev(FileAbbrev);
+
+ llvm::sys::Path MainFilePath(MainFile->getName());
+ std::string MainFileName;
+
+ if (!MainFilePath.isAbsolute()) {
+ llvm::sys::Path P = llvm::sys::Path::GetCurrentDirectory();
+ P.appendComponent(MainFilePath.str());
+ MainFileName = P.str();
+ } else {
+ MainFileName = MainFilePath.str();
+ }
+
+ const char *MainFileNameStr = MainFileName.c_str();
+ MainFileNameStr = adjustFilenameForRelocatablePCH(MainFileNameStr,
+ isysroot);
+ RecordData Record;
+ Record.push_back(pch::ORIGINAL_FILE_NAME);
+ Stream.EmitRecordWithBlob(FileAbbrevCode, Record, MainFileNameStr);
+ }
+
+ // Repository branch/version information.
+ BitCodeAbbrev *RepoAbbrev = new BitCodeAbbrev();
+ RepoAbbrev->Add(BitCodeAbbrevOp(pch::VERSION_CONTROL_BRANCH_REVISION));
+ RepoAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // SVN branch/tag
+ unsigned RepoAbbrevCode = Stream.EmitAbbrev(RepoAbbrev);
+ Record.clear();
+ Record.push_back(pch::VERSION_CONTROL_BRANCH_REVISION);
+ Stream.EmitRecordWithBlob(RepoAbbrevCode, Record,
+ getClangFullRepositoryVersion());
+}
+
+/// \brief Write the LangOptions structure.
+void PCHWriter::WriteLanguageOptions(const LangOptions &LangOpts) {
+ RecordData Record;
+ Record.push_back(LangOpts.Trigraphs);
+ Record.push_back(LangOpts.BCPLComment); // BCPL-style '//' comments.
+ Record.push_back(LangOpts.DollarIdents); // '$' allowed in identifiers.
+ Record.push_back(LangOpts.AsmPreprocessor); // Preprocessor in asm mode.
+ Record.push_back(LangOpts.GNUMode); // True in gnu99 mode false in c99 mode (etc)
+ Record.push_back(LangOpts.ImplicitInt); // C89 implicit 'int'.
+ Record.push_back(LangOpts.Digraphs); // C94, C99 and C++
+ Record.push_back(LangOpts.HexFloats); // C99 Hexadecimal float constants.
+ Record.push_back(LangOpts.C99); // C99 Support
+ Record.push_back(LangOpts.Microsoft); // Microsoft extensions.
+ Record.push_back(LangOpts.CPlusPlus); // C++ Support
+ Record.push_back(LangOpts.CPlusPlus0x); // C++0x Support
+ Record.push_back(LangOpts.CXXOperatorNames); // Treat C++ operator names as keywords.
+
+ Record.push_back(LangOpts.ObjC1); // Objective-C 1 support enabled.
+ Record.push_back(LangOpts.ObjC2); // Objective-C 2 support enabled.
+ Record.push_back(LangOpts.ObjCNonFragileABI); // Objective-C
+ // modern abi enabled.
+ Record.push_back(LangOpts.ObjCNonFragileABI2); // Objective-C enhanced
+ // modern abi enabled.
+
+ Record.push_back(LangOpts.PascalStrings); // Allow Pascal strings
+ Record.push_back(LangOpts.WritableStrings); // Allow writable strings
+ Record.push_back(LangOpts.LaxVectorConversions);
+ Record.push_back(LangOpts.AltiVec);
+ Record.push_back(LangOpts.Exceptions); // Support exception handling.
+
+ Record.push_back(LangOpts.NeXTRuntime); // Use NeXT runtime.
+ Record.push_back(LangOpts.Freestanding); // Freestanding implementation
+ Record.push_back(LangOpts.NoBuiltin); // Do not use builtin functions (-fno-builtin)
+
+ // Whether static initializers are protected by locks.
+ Record.push_back(LangOpts.ThreadsafeStatics);
+ Record.push_back(LangOpts.POSIXThreads);
+ Record.push_back(LangOpts.Blocks); // block extension to C
+ Record.push_back(LangOpts.EmitAllDecls); // Emit all declarations, even if
+ // they are unused.
+ Record.push_back(LangOpts.MathErrno); // Math functions must respect errno
+ // (modulo the platform support).
+
+ Record.push_back(LangOpts.OverflowChecking); // Extension to call a handler function when
+ // signed integer arithmetic overflows.
+
+ Record.push_back(LangOpts.HeinousExtensions); // Extensions that we really don't like and
+ // may be ripped out at any time.
+
+ Record.push_back(LangOpts.Optimize); // Whether __OPTIMIZE__ should be defined.
+ Record.push_back(LangOpts.OptimizeSize); // Whether __OPTIMIZE_SIZE__ should be
+ // defined.
+ Record.push_back(LangOpts.Static); // Should __STATIC__ be defined (as
+ // opposed to __DYNAMIC__).
+ Record.push_back(LangOpts.PICLevel); // The value for __PIC__, if non-zero.
+
+ Record.push_back(LangOpts.GNUInline); // Should GNU inline semantics be
+ // used (instead of C99 semantics).
+ Record.push_back(LangOpts.NoInline); // Should __NO_INLINE__ be defined.
+ Record.push_back(LangOpts.AccessControl); // Whether C++ access control should
+ // be enabled.
+ Record.push_back(LangOpts.CharIsSigned); // Whether char is a signed or
+ // unsigned type
+ Record.push_back(LangOpts.ShortWChar); // force wchar_t to be unsigned short
+ Record.push_back(LangOpts.getGCMode());
+ Record.push_back(LangOpts.getVisibilityMode());
+ Record.push_back(LangOpts.getStackProtectorMode());
+ Record.push_back(LangOpts.InstantiationDepth);
+ Record.push_back(LangOpts.OpenCL);
+ Record.push_back(LangOpts.CatchUndefined);
+ Record.push_back(LangOpts.ElideConstructors);
+ Stream.EmitRecord(pch::LANGUAGE_OPTIONS, Record);
+}
+
+//===----------------------------------------------------------------------===//
+// stat cache Serialization
+//===----------------------------------------------------------------------===//
+
+namespace {
+// Trait used for the on-disk hash table of stat cache results.
+class PCHStatCacheTrait {
+public:
+ typedef const char * key_type;
+ typedef key_type key_type_ref;
+
+ typedef std::pair<int, struct stat> data_type;
+ typedef const data_type& data_type_ref;
+
+ static unsigned ComputeHash(const char *path) {
+ return llvm::HashString(path);
+ }
+
+ std::pair<unsigned,unsigned>
+ EmitKeyDataLength(llvm::raw_ostream& Out, const char *path,
+ data_type_ref Data) {
+ unsigned StrLen = strlen(path);
+ clang::io::Emit16(Out, StrLen);
+ unsigned DataLen = 1; // result value
+ if (Data.first == 0)
+ DataLen += 4 + 4 + 2 + 8 + 8;
+ clang::io::Emit8(Out, DataLen);
+ return std::make_pair(StrLen + 1, DataLen);
+ }
+
+ void EmitKey(llvm::raw_ostream& Out, const char *path, unsigned KeyLen) {
+ Out.write(path, KeyLen);
+ }
+
+ void EmitData(llvm::raw_ostream& Out, key_type_ref,
+ data_type_ref Data, unsigned DataLen) {
+ using namespace clang::io;
+ uint64_t Start = Out.tell(); (void)Start;
+
+ // Result of stat()
+ Emit8(Out, Data.first? 1 : 0);
+
+ if (Data.first == 0) {
+ Emit32(Out, (uint32_t) Data.second.st_ino);
+ Emit32(Out, (uint32_t) Data.second.st_dev);
+ Emit16(Out, (uint16_t) Data.second.st_mode);
+ Emit64(Out, (uint64_t) Data.second.st_mtime);
+ Emit64(Out, (uint64_t) Data.second.st_size);
+ }
+
+ assert(Out.tell() - Start == DataLen && "Wrong data length");
+ }
+};
+} // end anonymous namespace
+
+/// \brief Write the stat() system call cache to the PCH file.
+void PCHWriter::WriteStatCache(MemorizeStatCalls &StatCalls,
+ const char *isysroot) {
+ // Build the on-disk hash table containing information about every
+ // stat() call.
+ OnDiskChainedHashTableGenerator<PCHStatCacheTrait> Generator;
+ unsigned NumStatEntries = 0;
+ for (MemorizeStatCalls::iterator Stat = StatCalls.begin(),
+ StatEnd = StatCalls.end();
+ Stat != StatEnd; ++Stat, ++NumStatEntries) {
+ const char *Filename = Stat->first();
+ Filename = adjustFilenameForRelocatablePCH(Filename, isysroot);
+ Generator.insert(Filename, Stat->second);
+ }
+
+ // Create the on-disk hash table in a buffer.
+ llvm::SmallString<4096> StatCacheData;
+ uint32_t BucketOffset;
+ {
+ llvm::raw_svector_ostream Out(StatCacheData);
+ // Make sure that no bucket is at offset 0
+ clang::io::Emit32(Out, 0);
+ BucketOffset = Generator.Emit(Out);
+ }
+
+ // Create a blob abbreviation
+ using namespace llvm;
+ BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::STAT_CACHE));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
+ unsigned StatCacheAbbrev = Stream.EmitAbbrev(Abbrev);
+
+ // Write the stat cache
+ RecordData Record;
+ Record.push_back(pch::STAT_CACHE);
+ Record.push_back(BucketOffset);
+ Record.push_back(NumStatEntries);
+ Stream.EmitRecordWithBlob(StatCacheAbbrev, Record, StatCacheData.str());
+}
+
+//===----------------------------------------------------------------------===//
+// Source Manager Serialization
+//===----------------------------------------------------------------------===//
+
+/// \brief Create an abbreviation for the SLocEntry that refers to a
+/// file.
+static unsigned CreateSLocFileAbbrev(llvm::BitstreamWriter &Stream) {
+ using namespace llvm;
+ BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::SM_SLOC_FILE_ENTRY));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Include location
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // Characteristic
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Line directives
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
+ return Stream.EmitAbbrev(Abbrev);
+}
+
+/// \brief Create an abbreviation for the SLocEntry that refers to a
+/// buffer.
+static unsigned CreateSLocBufferAbbrev(llvm::BitstreamWriter &Stream) {
+ using namespace llvm;
+ BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::SM_SLOC_BUFFER_ENTRY));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Include location
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // Characteristic
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Line directives
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Buffer name blob
+ return Stream.EmitAbbrev(Abbrev);
+}
+
+/// \brief Create an abbreviation for the SLocEntry that refers to a
+/// buffer's blob.
+static unsigned CreateSLocBufferBlobAbbrev(llvm::BitstreamWriter &Stream) {
+ using namespace llvm;
+ BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::SM_SLOC_BUFFER_BLOB));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Blob
+ return Stream.EmitAbbrev(Abbrev);
+}
+
+/// \brief Create an abbreviation for the SLocEntry that refers to an
+/// buffer.
+static unsigned CreateSLocInstantiationAbbrev(llvm::BitstreamWriter &Stream) {
+ using namespace llvm;
+ BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::SM_SLOC_INSTANTIATION_ENTRY));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Spelling location
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Start location
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // End location
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Token length
+ return Stream.EmitAbbrev(Abbrev);
+}
+
+/// \brief Writes the block containing the serialized form of the
+/// source manager.
+///
+/// TODO: We should probably use an on-disk hash table (stored in a
+/// blob), indexed based on the file name, so that we only create
+/// entries for files that we actually need. In the common case (no
+/// errors), we probably won't have to create file entries for any of
+/// the files in the AST.
+void PCHWriter::WriteSourceManagerBlock(SourceManager &SourceMgr,
+ const Preprocessor &PP,
+ const char *isysroot) {
+ RecordData Record;
+
+ // Enter the source manager block.
+ Stream.EnterSubblock(pch::SOURCE_MANAGER_BLOCK_ID, 3);
+
+ // Abbreviations for the various kinds of source-location entries.
+ unsigned SLocFileAbbrv = CreateSLocFileAbbrev(Stream);
+ unsigned SLocBufferAbbrv = CreateSLocBufferAbbrev(Stream);
+ unsigned SLocBufferBlobAbbrv = CreateSLocBufferBlobAbbrev(Stream);
+ unsigned SLocInstantiationAbbrv = CreateSLocInstantiationAbbrev(Stream);
+
+ // Write the line table.
+ if (SourceMgr.hasLineTable()) {
+ LineTableInfo &LineTable = SourceMgr.getLineTable();
+
+ // Emit the file names
+ Record.push_back(LineTable.getNumFilenames());
+ for (unsigned I = 0, N = LineTable.getNumFilenames(); I != N; ++I) {
+ // Emit the file name
+ const char *Filename = LineTable.getFilename(I);
+ Filename = adjustFilenameForRelocatablePCH(Filename, isysroot);
+ unsigned FilenameLen = Filename? strlen(Filename) : 0;
+ Record.push_back(FilenameLen);
+ if (FilenameLen)
+ Record.insert(Record.end(), Filename, Filename + FilenameLen);
+ }
+
+ // Emit the line entries
+ for (LineTableInfo::iterator L = LineTable.begin(), LEnd = LineTable.end();
+ L != LEnd; ++L) {
+ // Emit the file ID
+ Record.push_back(L->first);
+
+ // Emit the line entries
+ Record.push_back(L->second.size());
+ for (std::vector<LineEntry>::iterator LE = L->second.begin(),
+ LEEnd = L->second.end();
+ LE != LEEnd; ++LE) {
+ Record.push_back(LE->FileOffset);
+ Record.push_back(LE->LineNo);
+ Record.push_back(LE->FilenameID);
+ Record.push_back((unsigned)LE->FileKind);
+ Record.push_back(LE->IncludeOffset);
+ }
+ }
+ Stream.EmitRecord(pch::SM_LINE_TABLE, Record);
+ }
+
+ // Write out entries for all of the header files we know about.
+ HeaderSearch &HS = PP.getHeaderSearchInfo();
+ Record.clear();
+ for (HeaderSearch::header_file_iterator I = HS.header_file_begin(),
+ E = HS.header_file_end();
+ I != E; ++I) {
+ Record.push_back(I->isImport);
+ Record.push_back(I->DirInfo);
+ Record.push_back(I->NumIncludes);
+ AddIdentifierRef(I->ControllingMacro, Record);
+ Stream.EmitRecord(pch::SM_HEADER_FILE_INFO, Record);
+ Record.clear();
+ }
+
+ // Write out the source location entry table. We skip the first
+ // entry, which is always the same dummy entry.
+ std::vector<uint32_t> SLocEntryOffsets;
+ RecordData PreloadSLocs;
+ SLocEntryOffsets.reserve(SourceMgr.sloc_entry_size() - 1);
+ for (unsigned I = 1, N = SourceMgr.sloc_entry_size(); I != N; ++I) {
+ // Get this source location entry.
+ const SrcMgr::SLocEntry *SLoc = &SourceMgr.getSLocEntry(I);
+
+ // Record the offset of this source-location entry.
+ SLocEntryOffsets.push_back(Stream.GetCurrentBitNo());
+
+ // Figure out which record code to use.
+ unsigned Code;
+ if (SLoc->isFile()) {
+ if (SLoc->getFile().getContentCache()->Entry)
+ Code = pch::SM_SLOC_FILE_ENTRY;
+ else
+ Code = pch::SM_SLOC_BUFFER_ENTRY;
+ } else
+ Code = pch::SM_SLOC_INSTANTIATION_ENTRY;
+ Record.clear();
+ Record.push_back(Code);
+
+ Record.push_back(SLoc->getOffset());
+ if (SLoc->isFile()) {
+ const SrcMgr::FileInfo &File = SLoc->getFile();
+ Record.push_back(File.getIncludeLoc().getRawEncoding());
+ Record.push_back(File.getFileCharacteristic()); // FIXME: stable encoding
+ Record.push_back(File.hasLineDirectives());
+
+ const SrcMgr::ContentCache *Content = File.getContentCache();
+ if (Content->Entry) {
+ // The source location entry is a file. The blob associated
+ // with this entry is the file name.
+
+ // Turn the file name into an absolute path, if it isn't already.
+ const char *Filename = Content->Entry->getName();
+ llvm::sys::Path FilePath(Filename, strlen(Filename));
+ std::string FilenameStr;
+ if (!FilePath.isAbsolute()) {
+ llvm::sys::Path P = llvm::sys::Path::GetCurrentDirectory();
+ P.appendComponent(FilePath.str());
+ FilenameStr = P.str();
+ Filename = FilenameStr.c_str();
+ }
+
+ Filename = adjustFilenameForRelocatablePCH(Filename, isysroot);
+ Stream.EmitRecordWithBlob(SLocFileAbbrv, Record, Filename);
+
+ // FIXME: For now, preload all file source locations, so that
+ // we get the appropriate File entries in the reader. This is
+ // a temporary measure.
+ PreloadSLocs.push_back(SLocEntryOffsets.size());
+ } else {
+ // The source location entry is a buffer. The blob associated
+ // with this entry contains the contents of the buffer.
+
+ // We add one to the size so that we capture the trailing NULL
+ // that is required by llvm::MemoryBuffer::getMemBuffer (on
+ // the reader side).
+ const llvm::MemoryBuffer *Buffer = Content->getBuffer();
+ const char *Name = Buffer->getBufferIdentifier();
+ Stream.EmitRecordWithBlob(SLocBufferAbbrv, Record,
+ llvm::StringRef(Name, strlen(Name) + 1));
+ Record.clear();
+ Record.push_back(pch::SM_SLOC_BUFFER_BLOB);
+ Stream.EmitRecordWithBlob(SLocBufferBlobAbbrv, Record,
+ llvm::StringRef(Buffer->getBufferStart(),
+ Buffer->getBufferSize() + 1));
+
+ if (strcmp(Name, "<built-in>") == 0)
+ PreloadSLocs.push_back(SLocEntryOffsets.size());
+ }
+ } else {
+ // The source location entry is an instantiation.
+ const SrcMgr::InstantiationInfo &Inst = SLoc->getInstantiation();
+ Record.push_back(Inst.getSpellingLoc().getRawEncoding());
+ Record.push_back(Inst.getInstantiationLocStart().getRawEncoding());
+ Record.push_back(Inst.getInstantiationLocEnd().getRawEncoding());
+
+ // Compute the token length for this macro expansion.
+ unsigned NextOffset = SourceMgr.getNextOffset();
+ if (I + 1 != N)
+ NextOffset = SourceMgr.getSLocEntry(I + 1).getOffset();
+ Record.push_back(NextOffset - SLoc->getOffset() - 1);
+ Stream.EmitRecordWithAbbrev(SLocInstantiationAbbrv, Record);
+ }
+ }
+
+ Stream.ExitBlock();
+
+ if (SLocEntryOffsets.empty())
+ return;
+
+ // Write the source-location offsets table into the PCH block. This
+ // table is used for lazily loading source-location information.
+ using namespace llvm;
+ BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::SOURCE_LOCATION_OFFSETS));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 16)); // # of slocs
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 16)); // next offset
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // offsets
+ unsigned SLocOffsetsAbbrev = Stream.EmitAbbrev(Abbrev);
+
+ Record.clear();
+ Record.push_back(pch::SOURCE_LOCATION_OFFSETS);
+ Record.push_back(SLocEntryOffsets.size());
+ Record.push_back(SourceMgr.getNextOffset());
+ Stream.EmitRecordWithBlob(SLocOffsetsAbbrev, Record,
+ (const char *)&SLocEntryOffsets.front(),
+ SLocEntryOffsets.size()*sizeof(SLocEntryOffsets[0]));
+
+ // Write the source location entry preloads array, telling the PCH
+ // reader which source locations entries it should load eagerly.
+ Stream.EmitRecord(pch::SOURCE_LOCATION_PRELOADS, PreloadSLocs);
+}
+
+//===----------------------------------------------------------------------===//
+// Preprocessor Serialization
+//===----------------------------------------------------------------------===//
+
+/// \brief Writes the block containing the serialized form of the
+/// preprocessor.
+///
+void PCHWriter::WritePreprocessor(const Preprocessor &PP) {
+ RecordData Record;
+
+ // If the preprocessor __COUNTER__ value has been bumped, remember it.
+ if (PP.getCounterValue() != 0) {
+ Record.push_back(PP.getCounterValue());
+ Stream.EmitRecord(pch::PP_COUNTER_VALUE, Record);
+ Record.clear();
+ }
+
+ // Enter the preprocessor block.
+ Stream.EnterSubblock(pch::PREPROCESSOR_BLOCK_ID, 2);
+
+ // If the PCH file contains __DATE__ or __TIME__ emit a warning about this.
+ // FIXME: use diagnostics subsystem for localization etc.
+ if (PP.SawDateOrTime())
+ fprintf(stderr, "warning: precompiled header used __DATE__ or __TIME__.\n");
+
+ // Loop over all the macro definitions that are live at the end of the file,
+ // emitting each to the PP section.
+ for (Preprocessor::macro_iterator I = PP.macro_begin(), E = PP.macro_end();
+ I != E; ++I) {
+ // FIXME: This emits macros in hash table order, we should do it in a stable
+ // order so that output is reproducible.
+ MacroInfo *MI = I->second;
+
+ // Don't emit builtin macros like __LINE__ to the PCH file unless they have
+ // been redefined by the header (in which case they are not isBuiltinMacro).
+ if (MI->isBuiltinMacro())
+ continue;
+
+ AddIdentifierRef(I->first, Record);
+ MacroOffsets[I->first] = Stream.GetCurrentBitNo();
+ Record.push_back(MI->getDefinitionLoc().getRawEncoding());
+ Record.push_back(MI->isUsed());
+
+ unsigned Code;
+ if (MI->isObjectLike()) {
+ Code = pch::PP_MACRO_OBJECT_LIKE;
+ } else {
+ Code = pch::PP_MACRO_FUNCTION_LIKE;
+
+ Record.push_back(MI->isC99Varargs());
+ Record.push_back(MI->isGNUVarargs());
+ Record.push_back(MI->getNumArgs());
+ for (MacroInfo::arg_iterator I = MI->arg_begin(), E = MI->arg_end();
+ I != E; ++I)
+ AddIdentifierRef(*I, Record);
+ }
+ Stream.EmitRecord(Code, Record);
+ Record.clear();
+
+ // Emit the tokens array.
+ for (unsigned TokNo = 0, e = MI->getNumTokens(); TokNo != e; ++TokNo) {
+ // Note that we know that the preprocessor does not have any annotation
+ // tokens in it because they are created by the parser, and thus can't be
+ // in a macro definition.
+ const Token &Tok = MI->getReplacementToken(TokNo);
+
+ Record.push_back(Tok.getLocation().getRawEncoding());
+ Record.push_back(Tok.getLength());
+
+ // FIXME: When reading literal tokens, reconstruct the literal pointer if
+ // it is needed.
+ AddIdentifierRef(Tok.getIdentifierInfo(), Record);
+
+ // FIXME: Should translate token kind to a stable encoding.
+ Record.push_back(Tok.getKind());
+ // FIXME: Should translate token flags to a stable encoding.
+ Record.push_back(Tok.getFlags());
+
+ Stream.EmitRecord(pch::PP_TOKEN, Record);
+ Record.clear();
+ }
+ ++NumMacros;
+ }
+ Stream.ExitBlock();
+}
+
+void PCHWriter::WriteComments(ASTContext &Context) {
+ using namespace llvm;
+
+ if (Context.Comments.empty())
+ return;
+
+ BitCodeAbbrev *CommentAbbrev = new BitCodeAbbrev();
+ CommentAbbrev->Add(BitCodeAbbrevOp(pch::COMMENT_RANGES));
+ CommentAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
+ unsigned CommentCode = Stream.EmitAbbrev(CommentAbbrev);
+
+ RecordData Record;
+ Record.push_back(pch::COMMENT_RANGES);
+ Stream.EmitRecordWithBlob(CommentCode, Record,
+ (const char*)&Context.Comments[0],
+ Context.Comments.size() * sizeof(SourceRange));
+}
+
+//===----------------------------------------------------------------------===//
+// Type Serialization
+//===----------------------------------------------------------------------===//
+
+/// \brief Write the representation of a type to the PCH stream.
+void PCHWriter::WriteType(QualType T) {
+ pch::TypeID &ID = TypeIDs[T];
+ if (ID == 0) // we haven't seen this type before.
+ ID = NextTypeID++;
+
+ // Record the offset for this type.
+ if (TypeOffsets.size() == ID - pch::NUM_PREDEF_TYPE_IDS)
+ TypeOffsets.push_back(Stream.GetCurrentBitNo());
+ else if (TypeOffsets.size() < ID - pch::NUM_PREDEF_TYPE_IDS) {
+ TypeOffsets.resize(ID + 1 - pch::NUM_PREDEF_TYPE_IDS);
+ TypeOffsets[ID - pch::NUM_PREDEF_TYPE_IDS] = Stream.GetCurrentBitNo();
+ }
+
+ RecordData Record;
+
+ // Emit the type's representation.
+ PCHTypeWriter W(*this, Record);
+
+ if (T.hasLocalNonFastQualifiers()) {
+ Qualifiers Qs = T.getLocalQualifiers();
+ AddTypeRef(T.getLocalUnqualifiedType(), Record);
+ Record.push_back(Qs.getAsOpaqueValue());
+ W.Code = pch::TYPE_EXT_QUAL;
+ } else {
+ switch (T->getTypeClass()) {
+ // For all of the concrete, non-dependent types, call the
+ // appropriate visitor function.
+#define TYPE(Class, Base) \
+ case Type::Class: W.Visit##Class##Type(cast<Class##Type>(T)); break;
+#define ABSTRACT_TYPE(Class, Base)
+#define DEPENDENT_TYPE(Class, Base)
+#include "clang/AST/TypeNodes.def"
+
+ // For all of the dependent type nodes (which only occur in C++
+ // templates), produce an error.
+#define TYPE(Class, Base)
+#define DEPENDENT_TYPE(Class, Base) case Type::Class:
+#include "clang/AST/TypeNodes.def"
+ assert(false && "Cannot serialize dependent type nodes");
+ break;
+ }
+ }
+
+ // Emit the serialized record.
+ Stream.EmitRecord(W.Code, Record);
+
+ // Flush any expressions that were written as part of this type.
+ FlushStmts();
+}
+
+//===----------------------------------------------------------------------===//
+// Declaration Serialization
+//===----------------------------------------------------------------------===//
+
+/// \brief Write the block containing all of the declaration IDs
+/// lexically declared within the given DeclContext.
+///
+/// \returns the offset of the DECL_CONTEXT_LEXICAL block within the
+/// bistream, or 0 if no block was written.
+uint64_t PCHWriter::WriteDeclContextLexicalBlock(ASTContext &Context,
+ DeclContext *DC) {
+ if (DC->decls_empty())
+ return 0;
+
+ uint64_t Offset = Stream.GetCurrentBitNo();
+ RecordData Record;
+ for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
+ D != DEnd; ++D)
+ AddDeclRef(*D, Record);
+
+ ++NumLexicalDeclContexts;
+ Stream.EmitRecord(pch::DECL_CONTEXT_LEXICAL, Record);
+ return Offset;
+}
+
+/// \brief Write the block containing all of the declaration IDs
+/// visible from the given DeclContext.
+///
+/// \returns the offset of the DECL_CONTEXT_VISIBLE block within the
+/// bistream, or 0 if no block was written.
+uint64_t PCHWriter::WriteDeclContextVisibleBlock(ASTContext &Context,
+ DeclContext *DC) {
+ if (DC->getPrimaryContext() != DC)
+ return 0;
+
+ // Since there is no name lookup into functions or methods, and we
+ // perform name lookup for the translation unit via the
+ // IdentifierInfo chains, don't bother to build a
+ // visible-declarations table for these entities.
+ if (DC->isFunctionOrMethod() || DC->isTranslationUnit())
+ return 0;
+
+ // Force the DeclContext to build a its name-lookup table.
+ DC->lookup(DeclarationName());
+
+ // Serialize the contents of the mapping used for lookup. Note that,
+ // although we have two very different code paths, the serialized
+ // representation is the same for both cases: a declaration name,
+ // followed by a size, followed by references to the visible
+ // declarations that have that name.
+ uint64_t Offset = Stream.GetCurrentBitNo();
+ RecordData Record;
+ StoredDeclsMap *Map = static_cast<StoredDeclsMap*>(DC->getLookupPtr());
+ if (!Map)
+ return 0;
+
+ for (StoredDeclsMap::iterator D = Map->begin(), DEnd = Map->end();
+ D != DEnd; ++D) {
+ AddDeclarationName(D->first, Record);
+ DeclContext::lookup_result Result = D->second.getLookupResult(Context);
+ Record.push_back(Result.second - Result.first);
+ for (; Result.first != Result.second; ++Result.first)
+ AddDeclRef(*Result.first, Record);
+ }
+
+ if (Record.size() == 0)
+ return 0;
+
+ Stream.EmitRecord(pch::DECL_CONTEXT_VISIBLE, Record);
+ ++NumVisibleDeclContexts;
+ return Offset;
+}
+
+//===----------------------------------------------------------------------===//
+// Global Method Pool and Selector Serialization
+//===----------------------------------------------------------------------===//
+
+namespace {
+// Trait used for the on-disk hash table used in the method pool.
+class PCHMethodPoolTrait {
+ PCHWriter &Writer;
+
+public:
+ typedef Selector key_type;
+ typedef key_type key_type_ref;
+
+ typedef std::pair<ObjCMethodList, ObjCMethodList> data_type;
+ typedef const data_type& data_type_ref;
+
+ explicit PCHMethodPoolTrait(PCHWriter &Writer) : Writer(Writer) { }
+
+ static unsigned ComputeHash(Selector Sel) {
+ unsigned N = Sel.getNumArgs();
+ if (N == 0)
+ ++N;
+ unsigned R = 5381;
+ for (unsigned I = 0; I != N; ++I)
+ if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I))
+ R = llvm::HashString(II->getName(), R);
+ return R;
+ }
+
+ std::pair<unsigned,unsigned>
+ EmitKeyDataLength(llvm::raw_ostream& Out, Selector Sel,
+ data_type_ref Methods) {
+ unsigned KeyLen = 2 + (Sel.getNumArgs()? Sel.getNumArgs() * 4 : 4);
+ clang::io::Emit16(Out, KeyLen);
+ unsigned DataLen = 2 + 2; // 2 bytes for each of the method counts
+ for (const ObjCMethodList *Method = &Methods.first; Method;
+ Method = Method->Next)
+ if (Method->Method)
+ DataLen += 4;
+ for (const ObjCMethodList *Method = &Methods.second; Method;
+ Method = Method->Next)
+ if (Method->Method)
+ DataLen += 4;
+ clang::io::Emit16(Out, DataLen);
+ return std::make_pair(KeyLen, DataLen);
+ }
+
+ void EmitKey(llvm::raw_ostream& Out, Selector Sel, unsigned) {
+ uint64_t Start = Out.tell();
+ assert((Start >> 32) == 0 && "Selector key offset too large");
+ Writer.SetSelectorOffset(Sel, Start);
+ unsigned N = Sel.getNumArgs();
+ clang::io::Emit16(Out, N);
+ if (N == 0)
+ N = 1;
+ for (unsigned I = 0; I != N; ++I)
+ clang::io::Emit32(Out,
+ Writer.getIdentifierRef(Sel.getIdentifierInfoForSlot(I)));
+ }
+
+ void EmitData(llvm::raw_ostream& Out, key_type_ref,
+ data_type_ref Methods, unsigned DataLen) {
+ uint64_t Start = Out.tell(); (void)Start;
+ unsigned NumInstanceMethods = 0;
+ for (const ObjCMethodList *Method = &Methods.first; Method;
+ Method = Method->Next)
+ if (Method->Method)
+ ++NumInstanceMethods;
+
+ unsigned NumFactoryMethods = 0;
+ for (const ObjCMethodList *Method = &Methods.second; Method;
+ Method = Method->Next)
+ if (Method->Method)
+ ++NumFactoryMethods;
+
+ clang::io::Emit16(Out, NumInstanceMethods);
+ clang::io::Emit16(Out, NumFactoryMethods);
+ for (const ObjCMethodList *Method = &Methods.first; Method;
+ Method = Method->Next)
+ if (Method->Method)
+ clang::io::Emit32(Out, Writer.getDeclID(Method->Method));
+ for (const ObjCMethodList *Method = &Methods.second; Method;
+ Method = Method->Next)
+ if (Method->Method)
+ clang::io::Emit32(Out, Writer.getDeclID(Method->Method));
+
+ assert(Out.tell() - Start == DataLen && "Data length is wrong");
+ }
+};
+} // end anonymous namespace
+
+/// \brief Write the method pool into the PCH file.
+///
+/// The method pool contains both instance and factory methods, stored
+/// in an on-disk hash table indexed by the selector.
+void PCHWriter::WriteMethodPool(Sema &SemaRef) {
+ using namespace llvm;
+
+ // Create and write out the blob that contains the instance and
+ // factor method pools.
+ bool Empty = true;
+ {
+ OnDiskChainedHashTableGenerator<PCHMethodPoolTrait> Generator;
+
+ // Create the on-disk hash table representation. Start by
+ // iterating through the instance method pool.
+ PCHMethodPoolTrait::key_type Key;
+ unsigned NumSelectorsInMethodPool = 0;
+ for (llvm::DenseMap<Selector, ObjCMethodList>::iterator
+ Instance = SemaRef.InstanceMethodPool.begin(),
+ InstanceEnd = SemaRef.InstanceMethodPool.end();
+ Instance != InstanceEnd; ++Instance) {
+ // Check whether there is a factory method with the same
+ // selector.
+ llvm::DenseMap<Selector, ObjCMethodList>::iterator Factory
+ = SemaRef.FactoryMethodPool.find(Instance->first);
+
+ if (Factory == SemaRef.FactoryMethodPool.end())
+ Generator.insert(Instance->first,
+ std::make_pair(Instance->second,
+ ObjCMethodList()));
+ else
+ Generator.insert(Instance->first,
+ std::make_pair(Instance->second, Factory->second));
+
+ ++NumSelectorsInMethodPool;
+ Empty = false;
+ }
+
+ // Now iterate through the factory method pool, to pick up any
+ // selectors that weren't already in the instance method pool.
+ for (llvm::DenseMap<Selector, ObjCMethodList>::iterator
+ Factory = SemaRef.FactoryMethodPool.begin(),
+ FactoryEnd = SemaRef.FactoryMethodPool.end();
+ Factory != FactoryEnd; ++Factory) {
+ // Check whether there is an instance method with the same
+ // selector. If so, there is no work to do here.
+ llvm::DenseMap<Selector, ObjCMethodList>::iterator Instance
+ = SemaRef.InstanceMethodPool.find(Factory->first);
+
+ if (Instance == SemaRef.InstanceMethodPool.end()) {
+ Generator.insert(Factory->first,
+ std::make_pair(ObjCMethodList(), Factory->second));
+ ++NumSelectorsInMethodPool;
+ }
+
+ Empty = false;
+ }
+
+ if (Empty && SelectorOffsets.empty())
+ return;
+
+ // Create the on-disk hash table in a buffer.
+ llvm::SmallString<4096> MethodPool;
+ uint32_t BucketOffset;
+ SelectorOffsets.resize(SelVector.size());
+ {
+ PCHMethodPoolTrait Trait(*this);
+ llvm::raw_svector_ostream Out(MethodPool);
+ // Make sure that no bucket is at offset 0
+ clang::io::Emit32(Out, 0);
+ BucketOffset = Generator.Emit(Out, Trait);
+
+ // For every selector that we have seen but which was not
+ // written into the hash table, write the selector itself and
+ // record it's offset.
+ for (unsigned I = 0, N = SelVector.size(); I != N; ++I)
+ if (SelectorOffsets[I] == 0)
+ Trait.EmitKey(Out, SelVector[I], 0);
+ }
+
+ // Create a blob abbreviation
+ BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::METHOD_POOL));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
+ unsigned MethodPoolAbbrev = Stream.EmitAbbrev(Abbrev);
+
+ // Write the method pool
+ RecordData Record;
+ Record.push_back(pch::METHOD_POOL);
+ Record.push_back(BucketOffset);
+ Record.push_back(NumSelectorsInMethodPool);
+ Stream.EmitRecordWithBlob(MethodPoolAbbrev, Record, MethodPool.str());
+
+ // Create a blob abbreviation for the selector table offsets.
+ Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::SELECTOR_OFFSETS));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // index
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
+ unsigned SelectorOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
+
+ // Write the selector offsets table.
+ Record.clear();
+ Record.push_back(pch::SELECTOR_OFFSETS);
+ Record.push_back(SelectorOffsets.size());
+ Stream.EmitRecordWithBlob(SelectorOffsetAbbrev, Record,
+ (const char *)&SelectorOffsets.front(),
+ SelectorOffsets.size() * 4);
+ }
+}
+
+//===----------------------------------------------------------------------===//
+// Identifier Table Serialization
+//===----------------------------------------------------------------------===//
+
+namespace {
+class PCHIdentifierTableTrait {
+ PCHWriter &Writer;
+ Preprocessor &PP;
+
+ /// \brief Determines whether this is an "interesting" identifier
+ /// that needs a full IdentifierInfo structure written into the hash
+ /// table.
+ static bool isInterestingIdentifier(const IdentifierInfo *II) {
+ return II->isPoisoned() ||
+ II->isExtensionToken() ||
+ II->hasMacroDefinition() ||
+ II->getObjCOrBuiltinID() ||
+ II->getFETokenInfo<void>();
+ }
+
+public:
+ typedef const IdentifierInfo* key_type;
+ typedef key_type key_type_ref;
+
+ typedef pch::IdentID data_type;
+ typedef data_type data_type_ref;
+
+ PCHIdentifierTableTrait(PCHWriter &Writer, Preprocessor &PP)
+ : Writer(Writer), PP(PP) { }
+
+ static unsigned ComputeHash(const IdentifierInfo* II) {
+ return llvm::HashString(II->getName());
+ }
+
+ std::pair<unsigned,unsigned>
+ EmitKeyDataLength(llvm::raw_ostream& Out, const IdentifierInfo* II,
+ pch::IdentID ID) {
+ unsigned KeyLen = II->getLength() + 1;
+ unsigned DataLen = 4; // 4 bytes for the persistent ID << 1
+ if (isInterestingIdentifier(II)) {
+ DataLen += 2; // 2 bytes for builtin ID, flags
+ if (II->hasMacroDefinition() &&
+ !PP.getMacroInfo(const_cast<IdentifierInfo *>(II))->isBuiltinMacro())
+ DataLen += 4;
+ for (IdentifierResolver::iterator D = IdentifierResolver::begin(II),
+ DEnd = IdentifierResolver::end();
+ D != DEnd; ++D)
+ DataLen += sizeof(pch::DeclID);
+ }
+ clang::io::Emit16(Out, DataLen);
+ // We emit the key length after the data length so that every
+ // string is preceded by a 16-bit length. This matches the PTH
+ // format for storing identifiers.
+ clang::io::Emit16(Out, KeyLen);
+ return std::make_pair(KeyLen, DataLen);
+ }
+
+ void EmitKey(llvm::raw_ostream& Out, const IdentifierInfo* II,
+ unsigned KeyLen) {
+ // Record the location of the key data. This is used when generating
+ // the mapping from persistent IDs to strings.
+ Writer.SetIdentifierOffset(II, Out.tell());
+ Out.write(II->getNameStart(), KeyLen);
+ }
+
+ void EmitData(llvm::raw_ostream& Out, const IdentifierInfo* II,
+ pch::IdentID ID, unsigned) {
+ if (!isInterestingIdentifier(II)) {
+ clang::io::Emit32(Out, ID << 1);
+ return;
+ }
+
+ clang::io::Emit32(Out, (ID << 1) | 0x01);
+ uint32_t Bits = 0;
+ bool hasMacroDefinition =
+ II->hasMacroDefinition() &&
+ !PP.getMacroInfo(const_cast<IdentifierInfo *>(II))->isBuiltinMacro();
+ Bits = (uint32_t)II->getObjCOrBuiltinID();
+ Bits = (Bits << 1) | unsigned(hasMacroDefinition);
+ Bits = (Bits << 1) | unsigned(II->isExtensionToken());
+ Bits = (Bits << 1) | unsigned(II->isPoisoned());
+ Bits = (Bits << 1) | unsigned(II->isCPlusPlusOperatorKeyword());
+ clang::io::Emit16(Out, Bits);
+
+ if (hasMacroDefinition)
+ clang::io::Emit32(Out, Writer.getMacroOffset(II));
+
+ // Emit the declaration IDs in reverse order, because the
+ // IdentifierResolver provides the declarations as they would be
+ // visible (e.g., the function "stat" would come before the struct
+ // "stat"), but IdentifierResolver::AddDeclToIdentifierChain()
+ // adds declarations to the end of the list (so we need to see the
+ // struct "status" before the function "status").
+ llvm::SmallVector<Decl *, 16> Decls(IdentifierResolver::begin(II),
+ IdentifierResolver::end());
+ for (llvm::SmallVector<Decl *, 16>::reverse_iterator D = Decls.rbegin(),
+ DEnd = Decls.rend();
+ D != DEnd; ++D)
+ clang::io::Emit32(Out, Writer.getDeclID(*D));
+ }
+};
+} // end anonymous namespace
+
+/// \brief Write the identifier table into the PCH file.
+///
+/// The identifier table consists of a blob containing string data
+/// (the actual identifiers themselves) and a separate "offsets" index
+/// that maps identifier IDs to locations within the blob.
+void PCHWriter::WriteIdentifierTable(Preprocessor &PP) {
+ using namespace llvm;
+
+ // Create and write out the blob that contains the identifier
+ // strings.
+ {
+ OnDiskChainedHashTableGenerator<PCHIdentifierTableTrait> Generator;
+
+ // Look for any identifiers that were named while processing the
+ // headers, but are otherwise not needed. We add these to the hash
+ // table to enable checking of the predefines buffer in the case
+ // where the user adds new macro definitions when building the PCH
+ // file.
+ for (IdentifierTable::iterator ID = PP.getIdentifierTable().begin(),
+ IDEnd = PP.getIdentifierTable().end();
+ ID != IDEnd; ++ID)
+ getIdentifierRef(ID->second);
+
+ // Create the on-disk hash table representation.
+ IdentifierOffsets.resize(IdentifierIDs.size());
+ for (llvm::DenseMap<const IdentifierInfo *, pch::IdentID>::iterator
+ ID = IdentifierIDs.begin(), IDEnd = IdentifierIDs.end();
+ ID != IDEnd; ++ID) {
+ assert(ID->first && "NULL identifier in identifier table");
+ Generator.insert(ID->first, ID->second);
+ }
+
+ // Create the on-disk hash table in a buffer.
+ llvm::SmallString<4096> IdentifierTable;
+ uint32_t BucketOffset;
+ {
+ PCHIdentifierTableTrait Trait(*this, PP);
+ llvm::raw_svector_ostream Out(IdentifierTable);
+ // Make sure that no bucket is at offset 0
+ clang::io::Emit32(Out, 0);
+ BucketOffset = Generator.Emit(Out, Trait);
+ }
+
+ // Create a blob abbreviation
+ BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::IDENTIFIER_TABLE));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
+ unsigned IDTableAbbrev = Stream.EmitAbbrev(Abbrev);
+
+ // Write the identifier table
+ RecordData Record;
+ Record.push_back(pch::IDENTIFIER_TABLE);
+ Record.push_back(BucketOffset);
+ Stream.EmitRecordWithBlob(IDTableAbbrev, Record, IdentifierTable.str());
+ }
+
+ // Write the offsets table for identifier IDs.
+ BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::IDENTIFIER_OFFSET));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of identifiers
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
+ unsigned IdentifierOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
+
+ RecordData Record;
+ Record.push_back(pch::IDENTIFIER_OFFSET);
+ Record.push_back(IdentifierOffsets.size());
+ Stream.EmitRecordWithBlob(IdentifierOffsetAbbrev, Record,
+ (const char *)&IdentifierOffsets.front(),
+ IdentifierOffsets.size() * sizeof(uint32_t));
+}
+
+//===----------------------------------------------------------------------===//
+// General Serialization Routines
+//===----------------------------------------------------------------------===//
+
+/// \brief Write a record containing the given attributes.
+void PCHWriter::WriteAttributeRecord(const Attr *Attr) {
+ RecordData Record;
+ for (; Attr; Attr = Attr->getNext()) {
+ Record.push_back(Attr->getKind()); // FIXME: stable encoding, target attrs
+ Record.push_back(Attr->isInherited());
+ switch (Attr->getKind()) {
+ default:
+ assert(0 && "Does not support PCH writing for this attribute yet!");
+ break;
+ case Attr::Alias:
+ AddString(cast<AliasAttr>(Attr)->getAliasee(), Record);
+ break;
+
+ case Attr::Aligned:
+ Record.push_back(cast<AlignedAttr>(Attr)->getAlignment());
+ break;
+
+ case Attr::AlwaysInline:
+ break;
+
+ case Attr::AnalyzerNoReturn:
+ break;
+
+ case Attr::Annotate:
+ AddString(cast<AnnotateAttr>(Attr)->getAnnotation(), Record);
+ break;
+
+ case Attr::AsmLabel:
+ AddString(cast<AsmLabelAttr>(Attr)->getLabel(), Record);
+ break;
+
+ case Attr::BaseCheck:
+ break;
+
+ case Attr::Blocks:
+ Record.push_back(cast<BlocksAttr>(Attr)->getType()); // FIXME: stable
+ break;
+
+ case Attr::CDecl:
+ break;
+
+ case Attr::Cleanup:
+ AddDeclRef(cast<CleanupAttr>(Attr)->getFunctionDecl(), Record);
+ break;
+
+ case Attr::Const:
+ break;
+
+ case Attr::Constructor:
+ Record.push_back(cast<ConstructorAttr>(Attr)->getPriority());
+ break;
+
+ case Attr::DLLExport:
+ case Attr::DLLImport:
+ case Attr::Deprecated:
+ break;
+
+ case Attr::Destructor:
+ Record.push_back(cast<DestructorAttr>(Attr)->getPriority());
+ break;
+
+ case Attr::FastCall:
+ case Attr::Final:
+ break;
+
+ case Attr::Format: {
+ const FormatAttr *Format = cast<FormatAttr>(Attr);
+ AddString(Format->getType(), Record);
+ Record.push_back(Format->getFormatIdx());
+ Record.push_back(Format->getFirstArg());
+ break;
+ }
+
+ case Attr::FormatArg: {
+ const FormatArgAttr *Format = cast<FormatArgAttr>(Attr);
+ Record.push_back(Format->getFormatIdx());
+ break;
+ }
+
+ case Attr::Sentinel : {
+ const SentinelAttr *Sentinel = cast<SentinelAttr>(Attr);
+ Record.push_back(Sentinel->getSentinel());
+ Record.push_back(Sentinel->getNullPos());
+ break;
+ }
+
+ case Attr::GNUInline:
+ case Attr::Hiding:
+ case Attr::IBOutletKind:
+ case Attr::Malloc:
+ case Attr::NoDebug:
+ case Attr::NoReturn:
+ case Attr::NoThrow:
+ case Attr::NoInline:
+ break;
+
+ case Attr::NonNull: {
+ const NonNullAttr *NonNull = cast<NonNullAttr>(Attr);
+ Record.push_back(NonNull->size());
+ Record.insert(Record.end(), NonNull->begin(), NonNull->end());
+ break;
+ }
+
+ case Attr::ObjCException:
+ case Attr::ObjCNSObject:
+ case Attr::CFReturnsRetained:
+ case Attr::NSReturnsRetained:
+ case Attr::Overloadable:
+ case Attr::Override:
+ break;
+
+ case Attr::PragmaPack:
+ Record.push_back(cast<PragmaPackAttr>(Attr)->getAlignment());
+ break;
+
+ case Attr::Packed:
+ break;
+
+ case Attr::Pure:
+ break;
+
+ case Attr::Regparm:
+ Record.push_back(cast<RegparmAttr>(Attr)->getNumParams());
+ break;
+
+ case Attr::ReqdWorkGroupSize:
+ Record.push_back(cast<ReqdWorkGroupSizeAttr>(Attr)->getXDim());
+ Record.push_back(cast<ReqdWorkGroupSizeAttr>(Attr)->getYDim());
+ Record.push_back(cast<ReqdWorkGroupSizeAttr>(Attr)->getZDim());
+ break;
+
+ case Attr::Section:
+ AddString(cast<SectionAttr>(Attr)->getName(), Record);
+ break;
+
+ case Attr::StdCall:
+ case Attr::TransparentUnion:
+ case Attr::Unavailable:
+ case Attr::Unused:
+ case Attr::Used:
+ break;
+
+ case Attr::Visibility:
+ // FIXME: stable encoding
+ Record.push_back(cast<VisibilityAttr>(Attr)->getVisibility());
+ break;
+
+ case Attr::WarnUnusedResult:
+ case Attr::Weak:
+ case Attr::WeakImport:
+ break;
+ }
+ }
+
+ Stream.EmitRecord(pch::DECL_ATTR, Record);
+}
+
+void PCHWriter::AddString(const std::string &Str, RecordData &Record) {
+ Record.push_back(Str.size());
+ Record.insert(Record.end(), Str.begin(), Str.end());
+}
+
+/// \brief Note that the identifier II occurs at the given offset
+/// within the identifier table.
+void PCHWriter::SetIdentifierOffset(const IdentifierInfo *II, uint32_t Offset) {
+ IdentifierOffsets[IdentifierIDs[II] - 1] = Offset;
+}
+
+/// \brief Note that the selector Sel occurs at the given offset
+/// within the method pool/selector table.
+void PCHWriter::SetSelectorOffset(Selector Sel, uint32_t Offset) {
+ unsigned ID = SelectorIDs[Sel];
+ assert(ID && "Unknown selector");
+ SelectorOffsets[ID - 1] = Offset;
+}
+
+PCHWriter::PCHWriter(llvm::BitstreamWriter &Stream)
+ : Stream(Stream), NextTypeID(pch::NUM_PREDEF_TYPE_IDS),
+ NumStatements(0), NumMacros(0), NumLexicalDeclContexts(0),
+ NumVisibleDeclContexts(0) { }
+
+void PCHWriter::WritePCH(Sema &SemaRef, MemorizeStatCalls *StatCalls,
+ const char *isysroot) {
+ using namespace llvm;
+
+ ASTContext &Context = SemaRef.Context;
+ Preprocessor &PP = SemaRef.PP;
+
+ // Emit the file header.
+ Stream.Emit((unsigned)'C', 8);
+ Stream.Emit((unsigned)'P', 8);
+ Stream.Emit((unsigned)'C', 8);
+ Stream.Emit((unsigned)'H', 8);
+
+ WriteBlockInfoBlock();
+
+ // The translation unit is the first declaration we'll emit.
+ DeclIDs[Context.getTranslationUnitDecl()] = 1;
+ DeclTypesToEmit.push(Context.getTranslationUnitDecl());
+
+ // Make sure that we emit IdentifierInfos (and any attached
+ // declarations) for builtins.
+ {
+ IdentifierTable &Table = PP.getIdentifierTable();
+ llvm::SmallVector<const char *, 32> BuiltinNames;
+ Context.BuiltinInfo.GetBuiltinNames(BuiltinNames,
+ Context.getLangOptions().NoBuiltin);
+ for (unsigned I = 0, N = BuiltinNames.size(); I != N; ++I)
+ getIdentifierRef(&Table.get(BuiltinNames[I]));
+ }
+
+ // Build a record containing all of the tentative definitions in this file, in
+ // TentativeDefinitions order. Generally, this record will be empty for
+ // headers.
+ RecordData TentativeDefinitions;
+ for (unsigned i = 0, e = SemaRef.TentativeDefinitions.size(); i != e; ++i) {
+ AddDeclRef(SemaRef.TentativeDefinitions[i], TentativeDefinitions);
+ }
+
+ // Build a record containing all of the locally-scoped external
+ // declarations in this header file. Generally, this record will be
+ // empty.
+ RecordData LocallyScopedExternalDecls;
+ // FIXME: This is filling in the PCH file in densemap order which is
+ // nondeterminstic!
+ for (llvm::DenseMap<DeclarationName, NamedDecl *>::iterator
+ TD = SemaRef.LocallyScopedExternalDecls.begin(),
+ TDEnd = SemaRef.LocallyScopedExternalDecls.end();
+ TD != TDEnd; ++TD)
+ AddDeclRef(TD->second, LocallyScopedExternalDecls);
+
+ // Build a record containing all of the ext_vector declarations.
+ RecordData ExtVectorDecls;
+ for (unsigned I = 0, N = SemaRef.ExtVectorDecls.size(); I != N; ++I)
+ AddDeclRef(SemaRef.ExtVectorDecls[I], ExtVectorDecls);
+
+ // Write the remaining PCH contents.
+ RecordData Record;
+ Stream.EnterSubblock(pch::PCH_BLOCK_ID, 4);
+ WriteMetadata(Context, isysroot);
+ WriteLanguageOptions(Context.getLangOptions());
+ if (StatCalls && !isysroot)
+ WriteStatCache(*StatCalls, isysroot);
+ WriteSourceManagerBlock(Context.getSourceManager(), PP, isysroot);
+ WriteComments(Context);
+ // Write the record of special types.
+ Record.clear();
+
+ AddTypeRef(Context.getBuiltinVaListType(), Record);
+ AddTypeRef(Context.getObjCIdType(), Record);
+ AddTypeRef(Context.getObjCSelType(), Record);
+ AddTypeRef(Context.getObjCProtoType(), Record);
+ AddTypeRef(Context.getObjCClassType(), Record);
+ AddTypeRef(Context.getRawCFConstantStringType(), Record);
+ AddTypeRef(Context.getRawObjCFastEnumerationStateType(), Record);
+ AddTypeRef(Context.getFILEType(), Record);
+ AddTypeRef(Context.getjmp_bufType(), Record);
+ AddTypeRef(Context.getsigjmp_bufType(), Record);
+ AddTypeRef(Context.ObjCIdRedefinitionType, Record);
+ AddTypeRef(Context.ObjCClassRedefinitionType, Record);
+#if 0
+ // FIXME. Accommodate for this in several PCH/Indexer tests
+ AddTypeRef(Context.ObjCSelRedefinitionType, Record);
+#endif
+ AddTypeRef(Context.getRawBlockdescriptorType(), Record);
+ AddTypeRef(Context.getRawBlockdescriptorExtendedType(), Record);
+ Stream.EmitRecord(pch::SPECIAL_TYPES, Record);
+
+ // Keep writing types and declarations until all types and
+ // declarations have been written.
+ Stream.EnterSubblock(pch::DECLTYPES_BLOCK_ID, 3);
+ WriteDeclsBlockAbbrevs();
+ while (!DeclTypesToEmit.empty()) {
+ DeclOrType DOT = DeclTypesToEmit.front();
+ DeclTypesToEmit.pop();
+ if (DOT.isType())
+ WriteType(DOT.getType());
+ else
+ WriteDecl(Context, DOT.getDecl());
+ }
+ Stream.ExitBlock();
+
+ WritePreprocessor(PP);
+ WriteMethodPool(SemaRef);
+ WriteIdentifierTable(PP);
+
+ // Write the type offsets array
+ BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::TYPE_OFFSET));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of types
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // types block
+ unsigned TypeOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
+ Record.clear();
+ Record.push_back(pch::TYPE_OFFSET);
+ Record.push_back(TypeOffsets.size());
+ Stream.EmitRecordWithBlob(TypeOffsetAbbrev, Record,
+ (const char *)&TypeOffsets.front(),
+ TypeOffsets.size() * sizeof(TypeOffsets[0]));
+
+ // Write the declaration offsets array
+ Abbrev = new BitCodeAbbrev();
+ Abbrev->Add(BitCodeAbbrevOp(pch::DECL_OFFSET));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of declarations
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // declarations block
+ unsigned DeclOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
+ Record.clear();
+ Record.push_back(pch::DECL_OFFSET);
+ Record.push_back(DeclOffsets.size());
+ Stream.EmitRecordWithBlob(DeclOffsetAbbrev, Record,
+ (const char *)&DeclOffsets.front(),
+ DeclOffsets.size() * sizeof(DeclOffsets[0]));
+
+ // Write the record containing external, unnamed definitions.
+ if (!ExternalDefinitions.empty())
+ Stream.EmitRecord(pch::EXTERNAL_DEFINITIONS, ExternalDefinitions);
+
+ // Write the record containing tentative definitions.
+ if (!TentativeDefinitions.empty())
+ Stream.EmitRecord(pch::TENTATIVE_DEFINITIONS, TentativeDefinitions);
+
+ // Write the record containing locally-scoped external definitions.
+ if (!LocallyScopedExternalDecls.empty())
+ Stream.EmitRecord(pch::LOCALLY_SCOPED_EXTERNAL_DECLS,
+ LocallyScopedExternalDecls);
+
+ // Write the record containing ext_vector type names.
+ if (!ExtVectorDecls.empty())
+ Stream.EmitRecord(pch::EXT_VECTOR_DECLS, ExtVectorDecls);
+
+ // Some simple statistics
+ Record.clear();
+ Record.push_back(NumStatements);
+ Record.push_back(NumMacros);
+ Record.push_back(NumLexicalDeclContexts);
+ Record.push_back(NumVisibleDeclContexts);
+ Stream.EmitRecord(pch::STATISTICS, Record);
+ Stream.ExitBlock();
+}
+
+void PCHWriter::AddSourceLocation(SourceLocation Loc, RecordData &Record) {
+ Record.push_back(Loc.getRawEncoding());
+}
+
+void PCHWriter::AddAPInt(const llvm::APInt &Value, RecordData &Record) {
+ Record.push_back(Value.getBitWidth());
+ unsigned N = Value.getNumWords();
+ const uint64_t* Words = Value.getRawData();
+ for (unsigned I = 0; I != N; ++I)
+ Record.push_back(Words[I]);
+}
+
+void PCHWriter::AddAPSInt(const llvm::APSInt &Value, RecordData &Record) {
+ Record.push_back(Value.isUnsigned());
+ AddAPInt(Value, Record);
+}
+
+void PCHWriter::AddAPFloat(const llvm::APFloat &Value, RecordData &Record) {
+ AddAPInt(Value.bitcastToAPInt(), Record);
+}
+
+void PCHWriter::AddIdentifierRef(const IdentifierInfo *II, RecordData &Record) {
+ Record.push_back(getIdentifierRef(II));
+}
+
+pch::IdentID PCHWriter::getIdentifierRef(const IdentifierInfo *II) {
+ if (II == 0)
+ return 0;
+
+ pch::IdentID &ID = IdentifierIDs[II];
+ if (ID == 0)
+ ID = IdentifierIDs.size();
+ return ID;
+}
+
+void PCHWriter::AddSelectorRef(const Selector SelRef, RecordData &Record) {
+ if (SelRef.getAsOpaquePtr() == 0) {
+ Record.push_back(0);
+ return;
+ }
+
+ pch::SelectorID &SID = SelectorIDs[SelRef];
+ if (SID == 0) {
+ SID = SelectorIDs.size();
+ SelVector.push_back(SelRef);
+ }
+ Record.push_back(SID);
+}
+
+void PCHWriter::AddTemplateArgumentLoc(const TemplateArgumentLoc &Arg,
+ RecordData &Record) {
+ switch (Arg.getArgument().getKind()) {
+ case TemplateArgument::Expression:
+ AddStmt(Arg.getLocInfo().getAsExpr());
+ break;
+ case TemplateArgument::Type:
+ AddTypeSourceInfo(Arg.getLocInfo().getAsTypeSourceInfo(), Record);
+ break;
+ case TemplateArgument::Template:
+ Record.push_back(
+ Arg.getTemplateQualifierRange().getBegin().getRawEncoding());
+ Record.push_back(Arg.getTemplateQualifierRange().getEnd().getRawEncoding());
+ Record.push_back(Arg.getTemplateNameLoc().getRawEncoding());
+ break;
+ case TemplateArgument::Null:
+ case TemplateArgument::Integral:
+ case TemplateArgument::Declaration:
+ case TemplateArgument::Pack:
+ break;
+ }
+}
+
+void PCHWriter::AddTypeSourceInfo(TypeSourceInfo *TInfo, RecordData &Record) {
+ if (TInfo == 0) {
+ AddTypeRef(QualType(), Record);
+ return;
+ }
+
+ AddTypeRef(TInfo->getType(), Record);
+ TypeLocWriter TLW(*this, Record);
+ for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc())
+ TLW.Visit(TL);
+}
+
+void PCHWriter::AddTypeRef(QualType T, RecordData &Record) {
+ if (T.isNull()) {
+ Record.push_back(pch::PREDEF_TYPE_NULL_ID);
+ return;
+ }
+
+ unsigned FastQuals = T.getLocalFastQualifiers();
+ T.removeFastQualifiers();
+
+ if (T.hasLocalNonFastQualifiers()) {
+ pch::TypeID &ID = TypeIDs[T];
+ if (ID == 0) {
+ // We haven't seen these qualifiers applied to this type before.
+ // Assign it a new ID. This is the only time we enqueue a
+ // qualified type, and it has no CV qualifiers.
+ ID = NextTypeID++;
+ DeclTypesToEmit.push(T);
+ }
+
+ // Encode the type qualifiers in the type reference.
+ Record.push_back((ID << Qualifiers::FastWidth) | FastQuals);
+ return;
+ }
+
+ assert(!T.hasLocalQualifiers());
+
+ if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr())) {
+ pch::TypeID ID = 0;
+ switch (BT->getKind()) {
+ case BuiltinType::Void: ID = pch::PREDEF_TYPE_VOID_ID; break;
+ case BuiltinType::Bool: ID = pch::PREDEF_TYPE_BOOL_ID; break;
+ case BuiltinType::Char_U: ID = pch::PREDEF_TYPE_CHAR_U_ID; break;
+ case BuiltinType::UChar: ID = pch::PREDEF_TYPE_UCHAR_ID; break;
+ case BuiltinType::UShort: ID = pch::PREDEF_TYPE_USHORT_ID; break;
+ case BuiltinType::UInt: ID = pch::PREDEF_TYPE_UINT_ID; break;
+ case BuiltinType::ULong: ID = pch::PREDEF_TYPE_ULONG_ID; break;
+ case BuiltinType::ULongLong: ID = pch::PREDEF_TYPE_ULONGLONG_ID; break;
+ case BuiltinType::UInt128: ID = pch::PREDEF_TYPE_UINT128_ID; break;
+ case BuiltinType::Char_S: ID = pch::PREDEF_TYPE_CHAR_S_ID; break;
+ case BuiltinType::SChar: ID = pch::PREDEF_TYPE_SCHAR_ID; break;
+ case BuiltinType::WChar: ID = pch::PREDEF_TYPE_WCHAR_ID; break;
+ case BuiltinType::Short: ID = pch::PREDEF_TYPE_SHORT_ID; break;
+ case BuiltinType::Int: ID = pch::PREDEF_TYPE_INT_ID; break;
+ case BuiltinType::Long: ID = pch::PREDEF_TYPE_LONG_ID; break;
+ case BuiltinType::LongLong: ID = pch::PREDEF_TYPE_LONGLONG_ID; break;
+ case BuiltinType::Int128: ID = pch::PREDEF_TYPE_INT128_ID; break;
+ case BuiltinType::Float: ID = pch::PREDEF_TYPE_FLOAT_ID; break;
+ case BuiltinType::Double: ID = pch::PREDEF_TYPE_DOUBLE_ID; break;
+ case BuiltinType::LongDouble: ID = pch::PREDEF_TYPE_LONGDOUBLE_ID; break;
+ case BuiltinType::NullPtr: ID = pch::PREDEF_TYPE_NULLPTR_ID; break;
+ case BuiltinType::Char16: ID = pch::PREDEF_TYPE_CHAR16_ID; break;
+ case BuiltinType::Char32: ID = pch::PREDEF_TYPE_CHAR32_ID; break;
+ case BuiltinType::Overload: ID = pch::PREDEF_TYPE_OVERLOAD_ID; break;
+ case BuiltinType::Dependent: ID = pch::PREDEF_TYPE_DEPENDENT_ID; break;
+ case BuiltinType::ObjCId: ID = pch::PREDEF_TYPE_OBJC_ID; break;
+ case BuiltinType::ObjCClass: ID = pch::PREDEF_TYPE_OBJC_CLASS; break;
+ case BuiltinType::ObjCSel: ID = pch::PREDEF_TYPE_OBJC_SEL; break;
+ case BuiltinType::UndeducedAuto:
+ assert(0 && "Should not see undeduced auto here");
+ break;
+ }
+
+ Record.push_back((ID << Qualifiers::FastWidth) | FastQuals);
+ return;
+ }
+
+ pch::TypeID &ID = TypeIDs[T];
+ if (ID == 0) {
+ // We haven't seen this type before. Assign it a new ID and put it
+ // into the queue of types to emit.
+ ID = NextTypeID++;
+ DeclTypesToEmit.push(T);
+ }
+
+ // Encode the type qualifiers in the type reference.
+ Record.push_back((ID << Qualifiers::FastWidth) | FastQuals);
+}
+
+void PCHWriter::AddDeclRef(const Decl *D, RecordData &Record) {
+ if (D == 0) {
+ Record.push_back(0);
+ return;
+ }
+
+ pch::DeclID &ID = DeclIDs[D];
+ if (ID == 0) {
+ // We haven't seen this declaration before. Give it a new ID and
+ // enqueue it in the list of declarations to emit.
+ ID = DeclIDs.size();
+ DeclTypesToEmit.push(const_cast<Decl *>(D));
+ }
+
+ Record.push_back(ID);
+}
+
+pch::DeclID PCHWriter::getDeclID(const Decl *D) {
+ if (D == 0)
+ return 0;
+
+ assert(DeclIDs.find(D) != DeclIDs.end() && "Declaration not emitted!");
+ return DeclIDs[D];
+}
+
+void PCHWriter::AddDeclarationName(DeclarationName Name, RecordData &Record) {
+ // FIXME: Emit a stable enum for NameKind. 0 = Identifier etc.
+ Record.push_back(Name.getNameKind());
+ switch (Name.getNameKind()) {
+ case DeclarationName::Identifier:
+ AddIdentifierRef(Name.getAsIdentifierInfo(), Record);
+ break;
+
+ case DeclarationName::ObjCZeroArgSelector:
+ case DeclarationName::ObjCOneArgSelector:
+ case DeclarationName::ObjCMultiArgSelector:
+ AddSelectorRef(Name.getObjCSelector(), Record);
+ break;
+
+ case DeclarationName::CXXConstructorName:
+ case DeclarationName::CXXDestructorName:
+ case DeclarationName::CXXConversionFunctionName:
+ AddTypeRef(Name.getCXXNameType(), Record);
+ break;
+
+ case DeclarationName::CXXOperatorName:
+ Record.push_back(Name.getCXXOverloadedOperator());
+ break;
+
+ case DeclarationName::CXXLiteralOperatorName:
+ AddIdentifierRef(Name.getCXXLiteralIdentifier(), Record);
+ break;
+
+ case DeclarationName::CXXUsingDirective:
+ // No extra data to emit
+ break;
+ }
+}
+