[llvm-branch-commits] [clang] [Serialization] Code cleanups and polish 83233 (PR #83237)
Chuanqi Xu via llvm-branch-commits
llvm-branch-commits at lists.llvm.org
Tue Mar 5 07:28:41 PST 2024
https://github.com/ChuanqiXu9 updated https://github.com/llvm/llvm-project/pull/83237
>From 1d288e76b213a25d15fa6abdf633488838ed100a Mon Sep 17 00:00:00 2001
From: Chuanqi Xu <yedeng.yd at linux.alibaba.com>
Date: Wed, 28 Feb 2024 11:41:53 +0800
Subject: [PATCH] [Serialization] Code cleanups and polish 83233
---
clang/include/clang/AST/DeclTemplate.h | 40 ++-------
clang/include/clang/AST/ExternalASTSource.h | 4 +-
.../clang/Sema/MultiplexExternalSemaSource.h | 2 +-
.../include/clang/Serialization/ASTBitCodes.h | 2 +-
clang/include/clang/Serialization/ASTReader.h | 2 +-
clang/lib/AST/DeclTemplate.cpp | 85 +++++++++----------
clang/lib/AST/ExternalASTSource.cpp | 6 +-
.../lib/Sema/MultiplexExternalSemaSource.cpp | 7 +-
clang/lib/Serialization/ASTCommon.h | 1 -
clang/lib/Serialization/ASTReader.cpp | 17 ++--
clang/lib/Serialization/ASTReaderDecl.cpp | 76 +----------------
clang/lib/Serialization/ASTReaderInternals.h | 1 -
clang/lib/Serialization/ASTWriter.cpp | 26 +-----
clang/lib/Serialization/ASTWriterDecl.cpp | 52 +-----------
14 files changed, 87 insertions(+), 234 deletions(-)
diff --git a/clang/include/clang/AST/DeclTemplate.h b/clang/include/clang/AST/DeclTemplate.h
index 51caef54baac26..870c0d1bdd4610 100644
--- a/clang/include/clang/AST/DeclTemplate.h
+++ b/clang/include/clang/AST/DeclTemplate.h
@@ -256,8 +256,8 @@ class TemplateArgumentList final
TemplateArgumentList(const TemplateArgumentList &) = delete;
TemplateArgumentList &operator=(const TemplateArgumentList &) = delete;
- /// Create hash for the given arguments.
- static unsigned ComputeODRHash(ArrayRef<TemplateArgument> Args);
+ /// Create stable hash for the given arguments across compiler invocations.
+ static unsigned ComputeStableHash(ArrayRef<TemplateArgument> Args);
/// Create a new template argument list that copies the given set of
/// template arguments.
@@ -733,25 +733,6 @@ class RedeclarableTemplateDecl : public TemplateDecl,
}
void anchor() override;
- struct LazySpecializationInfo {
- uint32_t DeclID = ~0U;
- unsigned ODRHash = ~0U;
- bool IsPartial = false;
- LazySpecializationInfo(uint32_t ID, unsigned Hash = ~0U,
- bool Partial = false)
- : DeclID(ID), ODRHash(Hash), IsPartial(Partial) {}
- LazySpecializationInfo() {}
- bool operator<(const LazySpecializationInfo &Other) const {
- return DeclID < Other.DeclID;
- }
- bool operator==(const LazySpecializationInfo &Other) const {
- assert((DeclID != Other.DeclID || ODRHash == Other.ODRHash) &&
- "Hashes differ!");
- assert((DeclID != Other.DeclID || IsPartial == Other.IsPartial) &&
- "Both must be the same kinds!");
- return DeclID == Other.DeclID;
- }
- };
protected:
template <typename EntryType> struct SpecEntryTraits {
@@ -795,16 +776,20 @@ class RedeclarableTemplateDecl : public TemplateDecl,
void loadLazySpecializationsImpl(bool OnlyPartial = false) const;
- void loadLazySpecializationsImpl(llvm::ArrayRef<TemplateArgument> Args,
+ bool loadLazySpecializationsImpl(llvm::ArrayRef<TemplateArgument> Args,
TemplateParameterList *TPL = nullptr) const;
- Decl *loadLazySpecializationImpl(LazySpecializationInfo &LazySpecInfo) const;
-
template <class EntryType, typename ...ProfileArguments>
typename SpecEntryTraits<EntryType>::DeclType*
findSpecializationImpl(llvm::FoldingSetVector<EntryType> &Specs,
void *&InsertPos, ProfileArguments &&...ProfileArgs);
+ template <class EntryType, typename... ProfileArguments>
+ typename SpecEntryTraits<EntryType>::DeclType *
+ findSpecializationLocally(llvm::FoldingSetVector<EntryType> &Specs,
+ void *&InsertPos,
+ ProfileArguments &&...ProfileArgs);
+
template <class Derived, class EntryType>
void addSpecializationImpl(llvm::FoldingSetVector<EntryType> &Specs,
EntryType *Entry, void *InsertPos);
@@ -820,13 +805,6 @@ class RedeclarableTemplateDecl : public TemplateDecl,
llvm::PointerIntPair<RedeclarableTemplateDecl*, 1, bool>
InstantiatedFromMember;
- /// If non-null, points to an array of specializations (including
- /// partial specializations) known only by their external declaration IDs.
- ///
- /// The first value in the array is the number of specializations/partial
- /// specializations that follow.
- LazySpecializationInfo *LazySpecializations = nullptr;
-
/// The set of "injected" template arguments used within this
/// template.
///
diff --git a/clang/include/clang/AST/ExternalASTSource.h b/clang/include/clang/AST/ExternalASTSource.h
index af476aa8c57824..769abf44ecd430 100644
--- a/clang/include/clang/AST/ExternalASTSource.h
+++ b/clang/include/clang/AST/ExternalASTSource.h
@@ -157,7 +157,9 @@ class ExternalASTSource : public RefCountedBase<ExternalASTSource> {
/// Load all the specializations for the Decl \param D with the same template
/// args specified by \param TemplateArgs.
- virtual void
+ ///
+ /// Return true if any new specializations get loaded. Return false otherwise.
+ virtual bool
LoadExternalSpecializations(const Decl *D,
ArrayRef<TemplateArgument> TemplateArgs);
diff --git a/clang/include/clang/Sema/MultiplexExternalSemaSource.h b/clang/include/clang/Sema/MultiplexExternalSemaSource.h
index f09f037da0556a..2ac8f606ae9574 100644
--- a/clang/include/clang/Sema/MultiplexExternalSemaSource.h
+++ b/clang/include/clang/Sema/MultiplexExternalSemaSource.h
@@ -99,7 +99,7 @@ class MultiplexExternalSemaSource : public ExternalSemaSource {
void LoadExternalSpecializations(const Decl *D, bool OnlyPartial) override;
- void
+ bool
LoadExternalSpecializations(const Decl *D,
ArrayRef<TemplateArgument> TemplateArgs) override;
diff --git a/clang/include/clang/Serialization/ASTBitCodes.h b/clang/include/clang/Serialization/ASTBitCodes.h
index 15e7aef826a52a..827799ec7f0a3b 100644
--- a/clang/include/clang/Serialization/ASTBitCodes.h
+++ b/clang/include/clang/Serialization/ASTBitCodes.h
@@ -699,7 +699,7 @@ enum ASTRecordTypes {
/// recorded in a preamble.
PP_ASSUME_NONNULL_LOC = 67,
- UPDATE_SPECIALIZATION = 68,
+ CXX_ADDED_TEMPLATE_SPECIALIZATION = 68,
};
/// Record types used within a source manager block.
diff --git a/clang/include/clang/Serialization/ASTReader.h b/clang/include/clang/Serialization/ASTReader.h
index f1edd2fae645d4..f573a4766ea558 100644
--- a/clang/include/clang/Serialization/ASTReader.h
+++ b/clang/include/clang/Serialization/ASTReader.h
@@ -2006,7 +2006,7 @@ class ASTReader
void LoadExternalSpecializations(const Decl *D, bool OnlyPartial) override;
- void
+ bool
LoadExternalSpecializations(const Decl *D,
ArrayRef<TemplateArgument> TemplateArgs) override;
diff --git a/clang/lib/AST/DeclTemplate.cpp b/clang/lib/AST/DeclTemplate.cpp
index 7b98b046d00725..0051841420ae9b 100644
--- a/clang/lib/AST/DeclTemplate.cpp
+++ b/clang/lib/AST/DeclTemplate.cpp
@@ -342,60 +342,24 @@ void RedeclarableTemplateDecl::loadLazySpecializationsImpl(
ExternalSource->LoadExternalSpecializations(this->getCanonicalDecl(),
OnlyPartial);
return;
-
- // Grab the most recent declaration to ensure we've loaded any lazy
- // redeclarations of this template.
- CommonBase *CommonBasePtr = getMostRecentDecl()->getCommonPtr();
- if (auto *Specs = CommonBasePtr->LazySpecializations) {
- if (!OnlyPartial)
- CommonBasePtr->LazySpecializations = nullptr;
- for (uint32_t I = 0, N = Specs[0].DeclID; I != N; ++I) {
- // Skip over already loaded specializations.
- if (!Specs[I + 1].ODRHash)
- continue;
- if (!OnlyPartial || Specs[I + 1].IsPartial)
- (void)loadLazySpecializationImpl(Specs[I + 1]);
- }
- }
-}
-
-Decl *RedeclarableTemplateDecl::loadLazySpecializationImpl(
- LazySpecializationInfo &LazySpecInfo) const {
- llvm_unreachable("We don't use LazySpecializationInfo any more");
-
- uint32_t ID = LazySpecInfo.DeclID;
- assert(ID && "Loading already loaded specialization!");
- // Note that we loaded the specialization.
- LazySpecInfo.DeclID = LazySpecInfo.ODRHash = LazySpecInfo.IsPartial = 0;
- return getASTContext().getExternalSource()->GetExternalDecl(ID);
}
-void RedeclarableTemplateDecl::loadLazySpecializationsImpl(
+bool RedeclarableTemplateDecl::loadLazySpecializationsImpl(
ArrayRef<TemplateArgument> Args, TemplateParameterList *TPL) const {
auto *ExternalSource = getASTContext().getExternalSource();
if (!ExternalSource)
- return;
-
- ExternalSource->LoadExternalSpecializations(this->getCanonicalDecl(), Args);
- return;
+ return false;
- CommonBase *CommonBasePtr = getMostRecentDecl()->getCommonPtr();
- if (auto *Specs = CommonBasePtr->LazySpecializations) {
- unsigned Hash = TemplateArgumentList::ComputeODRHash(Args);
- for (uint32_t I = 0, N = Specs[0].DeclID; I != N; ++I)
- if (Specs[I + 1].ODRHash && Specs[I + 1].ODRHash == Hash)
- (void)loadLazySpecializationImpl(Specs[I + 1]);
- }
+ return ExternalSource->LoadExternalSpecializations(this->getCanonicalDecl(),
+ Args);
}
-template<class EntryType, typename... ProfileArguments>
+template <class EntryType, typename... ProfileArguments>
typename RedeclarableTemplateDecl::SpecEntryTraits<EntryType>::DeclType *
-RedeclarableTemplateDecl::findSpecializationImpl(
+RedeclarableTemplateDecl::findSpecializationLocally(
llvm::FoldingSetVector<EntryType> &Specs, void *&InsertPos,
- ProfileArguments&&... ProfileArgs) {
- using SETraits = SpecEntryTraits<EntryType>;
-
- loadLazySpecializationsImpl(std::forward<ProfileArguments>(ProfileArgs)...);
+ ProfileArguments &&...ProfileArgs) {
+ using SETraits = RedeclarableTemplateDecl::SpecEntryTraits<EntryType>;
llvm::FoldingSetNodeID ID;
EntryType::Profile(ID, std::forward<ProfileArguments>(ProfileArgs)...,
@@ -404,6 +368,24 @@ RedeclarableTemplateDecl::findSpecializationImpl(
return Entry ? SETraits::getDecl(Entry)->getMostRecentDecl() : nullptr;
}
+template <class EntryType, typename... ProfileArguments>
+typename RedeclarableTemplateDecl::SpecEntryTraits<EntryType>::DeclType *
+RedeclarableTemplateDecl::findSpecializationImpl(
+ llvm::FoldingSetVector<EntryType> &Specs, void *&InsertPos,
+ ProfileArguments &&...ProfileArgs) {
+
+ if (auto *Found = findSpecializationLocally(
+ Specs, InsertPos, std::forward<ProfileArguments>(ProfileArgs)...))
+ return Found;
+
+ if (!loadLazySpecializationsImpl(
+ std::forward<ProfileArguments>(ProfileArgs)...))
+ return nullptr;
+
+ return findSpecializationLocally(
+ Specs, InsertPos, std::forward<ProfileArguments>(ProfileArgs)...);
+}
+
template<class Derived, class EntryType>
void RedeclarableTemplateDecl::addSpecializationImpl(
llvm::FoldingSetVector<EntryType> &Specializations, EntryType *Entry,
@@ -939,7 +921,20 @@ TemplateArgumentList::CreateCopy(ASTContext &Context,
return new (Mem) TemplateArgumentList(Args);
}
-unsigned TemplateArgumentList::ComputeODRHash(ArrayRef<TemplateArgument> Args) {
+unsigned
+TemplateArgumentList::ComputeStableHash(ArrayRef<TemplateArgument> Args) {
+ // FIXME: ODR hashing may not be the best mechanism to hash the template
+ // arguments. ODR hashing is (or perhaps, should be) about determining whether
+ // two things are spelled the same way and have the same meaning (as required
+ // by the C++ ODR), whereas what we want here is whether they have the same
+ // meaning regardless of spelling. Maybe we can get away with reusing ODR
+ // hashing anyway, on the basis that any canonical, non-dependent template
+ // argument should have the same (invented) spelling in every translation
+ // unit, but it is not sure that's true in all cases. There may still be cases
+ // where the canonical type includes some aspect of "whatever we saw first",
+ // in which case the ODR hash can differ across translation units for
+ // non-dependent, canonical template arguments that are spelled differently
+ // but have the same meaning. But it is not easy to raise examples.
ODRHash Hasher;
for (TemplateArgument TA : Args)
Hasher.AddTemplateArgument(TA);
diff --git a/clang/lib/AST/ExternalASTSource.cpp b/clang/lib/AST/ExternalASTSource.cpp
index 14a41651360b67..88c524ecd102b7 100644
--- a/clang/lib/AST/ExternalASTSource.cpp
+++ b/clang/lib/AST/ExternalASTSource.cpp
@@ -102,8 +102,10 @@ ExternalASTSource::FindExternalVisibleDeclsByName(const DeclContext *DC,
void ExternalASTSource::LoadExternalSpecializations(const Decl *D, bool) {}
-void ExternalASTSource::LoadExternalSpecializations(
- const Decl *D, ArrayRef<TemplateArgument>) {}
+bool ExternalASTSource::LoadExternalSpecializations(
+ const Decl *D, ArrayRef<TemplateArgument>) {
+ return false;
+}
void ExternalASTSource::completeVisibleDeclsMap(const DeclContext *DC) {}
diff --git a/clang/lib/Sema/MultiplexExternalSemaSource.cpp b/clang/lib/Sema/MultiplexExternalSemaSource.cpp
index 397c2b215d2c6d..16484649159b5d 100644
--- a/clang/lib/Sema/MultiplexExternalSemaSource.cpp
+++ b/clang/lib/Sema/MultiplexExternalSemaSource.cpp
@@ -121,10 +121,13 @@ void MultiplexExternalSemaSource::LoadExternalSpecializations(
Sources[i]->LoadExternalSpecializations(D, OnlyPartial);
}
-void MultiplexExternalSemaSource::LoadExternalSpecializations(
+bool MultiplexExternalSemaSource::LoadExternalSpecializations(
const Decl *D, ArrayRef<TemplateArgument> TemplateArgs) {
+ bool AnyNewSpecsLoaded = false;
for (size_t i = 0; i < Sources.size(); ++i)
- Sources[i]->LoadExternalSpecializations(D, TemplateArgs);
+ AnyNewSpecsLoaded |=
+ Sources[i]->LoadExternalSpecializations(D, TemplateArgs);
+ return AnyNewSpecsLoaded;
}
void MultiplexExternalSemaSource::completeVisibleDeclsMap(const DeclContext *DC){
diff --git a/clang/lib/Serialization/ASTCommon.h b/clang/lib/Serialization/ASTCommon.h
index 296642e3674a49..485809f234113f 100644
--- a/clang/lib/Serialization/ASTCommon.h
+++ b/clang/lib/Serialization/ASTCommon.h
@@ -23,7 +23,6 @@ namespace serialization {
enum DeclUpdateKind {
UPD_CXX_ADDED_IMPLICIT_MEMBER,
- UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION,
UPD_CXX_ADDED_ANONYMOUS_NAMESPACE,
UPD_CXX_ADDED_FUNCTION_DEFINITION,
UPD_CXX_ADDED_VAR_DEFINITION,
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index d378ce338a6cda..52a3f3372503d9 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -3499,7 +3499,7 @@ llvm::Error ASTReader::ReadASTBlock(ModuleFile &F,
break;
}
- case UPDATE_SPECIALIZATION: {
+ case CXX_ADDED_TEMPLATE_SPECIALIZATION: {
unsigned Idx = 0;
serialization::DeclID ID = ReadDeclID(F, Record, Idx);
auto *Data = (const unsigned char *)Blob.data();
@@ -7964,23 +7964,30 @@ void ASTReader::LoadExternalSpecializations(const Decl *D, bool OnlyPartial) {
GetDecl(Info.ID);
}
-void ASTReader::LoadExternalSpecializations(
+bool ASTReader::LoadExternalSpecializations(
const Decl *D, ArrayRef<TemplateArgument> TemplateArgs) {
assert(D);
auto It = SpecializationsLookups.find(D);
if (It == SpecializationsLookups.end())
- return;
+ return false;
Deserializing LookupResults(this);
- auto HashValue = TemplateArgumentList::ComputeODRHash(TemplateArgs);
+ auto HashValue = TemplateArgumentList::ComputeStableHash(TemplateArgs);
// Get Decl may violate the iterator from SpecializationsLookups
llvm::SmallVector<serialization::reader::LazySpecializationInfo, 8> Infos =
It->second.Table.find(HashValue);
- for (auto &Info : Infos)
+ bool NewSpecsFound = false;
+ for (auto &Info : Infos) {
+ if (GetExistingDecl(Info.ID))
+ continue;
+ NewSpecsFound = true;
GetDecl(Info.ID);
+ }
+
+ return NewSpecsFound;
}
void ASTReader::FindExternalLexicalDecls(
diff --git a/clang/lib/Serialization/ASTReaderDecl.cpp b/clang/lib/Serialization/ASTReaderDecl.cpp
index 0b42b4c2713162..6236795dcd4156 100644
--- a/clang/lib/Serialization/ASTReaderDecl.cpp
+++ b/clang/lib/Serialization/ASTReaderDecl.cpp
@@ -88,8 +88,6 @@ namespace clang {
const SourceLocation ThisDeclLoc;
using RecordData = ASTReader::RecordData;
- using LazySpecializationInfo =
- RedeclarableTemplateDecl::LazySpecializationInfo;
TypeID DeferredTypeID = 0;
unsigned AnonymousDeclNumber = 0;
@@ -136,18 +134,6 @@ namespace clang {
return Record.readString();
}
- LazySpecializationInfo ReadLazySpecializationInfo() {
- DeclID ID = readDeclID();
- unsigned Hash = Record.readInt();
- bool IsPartial = Record.readInt();
- return LazySpecializationInfo(ID, Hash, IsPartial);
- }
-
- void readDeclIDList(SmallVectorImpl<LazySpecializationInfo> &IDs) {
- for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
- IDs.push_back(ReadLazySpecializationInfo());
- }
-
Decl *readDecl() {
return Record.readDecl();
}
@@ -274,29 +260,6 @@ namespace clang {
: Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
ThisDeclLoc(ThisDeclLoc) {}
- template <typename T>
- static void
- AddLazySpecializations(T *D, SmallVectorImpl<LazySpecializationInfo> &IDs) {
- if (IDs.empty())
- return;
-
- // FIXME: We should avoid this pattern of getting the ASTContext.
- ASTContext &C = D->getASTContext();
-
- auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
-
- if (auto &Old = LazySpecializations) {
- IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0].DeclID);
- llvm::sort(IDs);
- IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
- }
- auto *Result = new (C) LazySpecializationInfo[1 + IDs.size()];
- *Result = IDs.size();
- std::copy(IDs.begin(), IDs.end(), Result + 1);
-
- LazySpecializations = Result;
- }
-
template <typename DeclT>
static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
static Decl *getMostRecentDeclImpl(...);
@@ -328,7 +291,7 @@ namespace clang {
void ReadFunctionDefinition(FunctionDecl *FD);
void Visit(Decl *D);
- void UpdateDecl(Decl *D, llvm::SmallVectorImpl<LazySpecializationInfo> &);
+ void UpdateDecl(Decl *D);
static void setNextObjCCategory(ObjCCategoryDecl *Cat,
ObjCCategoryDecl *Next) {
@@ -2469,9 +2432,6 @@ void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
if (ThisDeclID == Redecl.getFirstID()) {
// This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
// the specializations.
- SmallVector<LazySpecializationInfo, 32> SpecIDs;
- readDeclIDList(SpecIDs);
- ASTDeclReader::AddLazySpecializations(D, SpecIDs);
ReadSpecializations(*Loc.F, D, Loc.F->DeclsCursor);
}
@@ -2498,9 +2458,6 @@ void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
if (ThisDeclID == Redecl.getFirstID()) {
// This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
// the specializations.
- SmallVector<LazySpecializationInfo, 32> SpecIDs;
- readDeclIDList(SpecIDs);
- ASTDeclReader::AddLazySpecializations(D, SpecIDs);
ReadSpecializations(*Loc.F, D, Loc.F->DeclsCursor);
}
}
@@ -2601,9 +2558,6 @@ void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
if (ThisDeclID == Redecl.getFirstID()) {
// This FunctionTemplateDecl owns a CommonPtr; read it.
- SmallVector<LazySpecializationInfo, 32> SpecIDs;
- readDeclIDList(SpecIDs);
- ASTDeclReader::AddLazySpecializations(D, SpecIDs);
ReadSpecializations(*Loc.F, D, Loc.F->DeclsCursor);
}
}
@@ -4214,10 +4168,6 @@ void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
- using LazySpecializationInfo =
- RedeclarableTemplateDecl::LazySpecializationInfo;
- llvm::SmallVector<LazySpecializationInfo, 8> PendingLazySpecializationIDs;
-
if (UpdI != DeclUpdateOffsets.end()) {
auto UpdateOffsets = std::move(UpdI->second);
DeclUpdateOffsets.erase(UpdI);
@@ -4255,7 +4205,7 @@ void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
SourceLocation());
- Reader.UpdateDecl(D, PendingLazySpecializationIDs);
+ Reader.UpdateDecl(D);
// We might have made this declaration interesting. If so, remember that
// we need to hand it off to the consumer.
@@ -4267,19 +4217,6 @@ void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
}
}
}
- // Add the lazy specializations to the template.
- assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||
- isa<FunctionTemplateDecl, VarTemplateDecl>(D)) &&
- "Must not have pending specializations");
- /*
- if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
- ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
- else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
- ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
- else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
- ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
- */
- PendingLazySpecializationIDs.clear();
// Load the pending visible updates for this decl context, if it has any.
auto I = PendingVisibleUpdates.find(ID);
@@ -4497,9 +4434,7 @@ static void forAllLaterRedecls(DeclT *D, Fn F) {
}
}
-void ASTDeclReader::UpdateDecl(
- Decl *D,
- SmallVectorImpl<LazySpecializationInfo> &PendingLazySpecializationIDs) {
+void ASTDeclReader::UpdateDecl(Decl *D) {
while (Record.getIdx() < Record.size()) {
switch ((DeclUpdateKind)Record.readInt()) {
case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
@@ -4510,11 +4445,6 @@ void ASTDeclReader::UpdateDecl(
break;
}
- case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
- // It will be added to the template's lazy specialization set.
- PendingLazySpecializationIDs.push_back(ReadLazySpecializationInfo());
- break;
-
case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
auto *Anon = readDeclAs<NamespaceDecl>();
diff --git a/clang/lib/Serialization/ASTReaderInternals.h b/clang/lib/Serialization/ASTReaderInternals.h
index 7febf0f489c327..792f128be89753 100644
--- a/clang/lib/Serialization/ASTReaderInternals.h
+++ b/clang/lib/Serialization/ASTReaderInternals.h
@@ -129,7 +129,6 @@ struct LazySpecializationInfo {
assert(ID != Other.ID || IsPartial == Other.IsPartial);
return ID == Other.ID;
}
-
// Records the size record in OnDiskHashTable.
// sizeof() may return 8 due to align requirements.
static constexpr unsigned Length = 5;
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index a3b8f3e78e9fcc..6482fe04a5938b 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -4048,7 +4048,7 @@ unsigned CalculateODRHashForSpecs(const Decl *Spec) {
else
llvm_unreachable("New Specialization Kind?");
- return TemplateArgumentList::ComputeODRHash(Args);
+ return TemplateArgumentList::ComputeStableHash(Args);
}
} // namespace
@@ -5455,7 +5455,7 @@ ASTFileSignature ASTWriter::WriteASTCore(Sema &SemaRef, StringRef isysroot,
void ASTWriter::WriteSpecializationsUpdates() {
auto Abv = std::make_shared<llvm::BitCodeAbbrev>();
- Abv->Add(llvm::BitCodeAbbrevOp(UPDATE_SPECIALIZATION));
+ Abv->Add(llvm::BitCodeAbbrevOp(CXX_ADDED_TEMPLATE_SPECIALIZATION));
Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::Blob));
auto UpdateSpecializationAbbrev = Stream.EmitAbbrev(std::move(Abv));
@@ -5468,7 +5468,8 @@ void ASTWriter::WriteSpecializationsUpdates() {
LookupTable);
// Write the lookup table
- RecordData::value_type Record[] = {UPDATE_SPECIALIZATION, getDeclID(D)};
+ RecordData::value_type Record[] = {CXX_ADDED_TEMPLATE_SPECIALIZATION,
+ getDeclID(D)};
Stream.EmitRecordWithBlob(UpdateSpecializationAbbrev, Record, LookupTable);
}
}
@@ -5505,25 +5506,6 @@ void ASTWriter::WriteDeclUpdatesBlocks(RecordDataImpl &OffsetsRecord) {
assert(Update.getDecl() && "no decl to add?");
Record.push_back(GetDeclRef(Update.getDecl()));
break;
- case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION: {
- const Decl *Spec = Update.getDecl();
- assert(Spec && "no decl to add?");
- Record.push_back(GetDeclRef(Spec));
- ArrayRef<TemplateArgument> Args;
- if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(Spec))
- Args = CTSD->getTemplateArgs().asArray();
- else if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Spec))
- Args = VTSD->getTemplateArgs().asArray();
- else if (auto *FD = dyn_cast<FunctionDecl>(Spec))
- Args = FD->getTemplateSpecializationArgs()->asArray();
- assert(Args.size());
- Record.push_back(TemplateArgumentList::ComputeODRHash(Args));
- bool IsPartialSpecialization =
- isa<ClassTemplatePartialSpecializationDecl>(Spec) ||
- isa<VarTemplatePartialSpecializationDecl>(Spec);
- Record.push_back(IsPartialSpecialization);
- break;
- }
case UPD_CXX_ADDED_FUNCTION_DEFINITION:
case UPD_CXX_ADDED_VAR_DEFINITION:
break;
diff --git a/clang/lib/Serialization/ASTWriterDecl.cpp b/clang/lib/Serialization/ASTWriterDecl.cpp
index ea2095c6c470d5..77acdbede0baee 100644
--- a/clang/lib/Serialization/ASTWriterDecl.cpp
+++ b/clang/lib/Serialization/ASTWriterDecl.cpp
@@ -213,24 +213,8 @@ namespace clang {
llvm::MapVector<ModuleFile *, const Decl *> Firsts;
CollectFirstDeclFromEachModule(D, /*IncludeLocal*/ true, Firsts);
- for (const auto &F : Firsts) {
+ for (const auto &F : Firsts)
SpecsInMap.push_back(F.second);
-
- Record.AddDeclRef(F.second);
- ArrayRef<TemplateArgument> Args;
- if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(D))
- Args = CTSD->getTemplateArgs().asArray();
- else if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D))
- Args = VTSD->getTemplateArgs().asArray();
- else if (auto *FD = dyn_cast<FunctionDecl>(D))
- Args = FD->getTemplateSpecializationArgs()->asArray();
- assert(Args.size());
- Record.push_back(TemplateArgumentList::ComputeODRHash(Args));
- bool IsPartialSpecialization =
- isa<ClassTemplatePartialSpecializationDecl>(D) ||
- isa<VarTemplatePartialSpecializationDecl>(D);
- Record.push_back(IsPartialSpecialization);
- }
}
/// Get the specialization decl from an entry in the specialization list.
@@ -257,22 +241,12 @@ namespace clang {
// If we have any lazy specializations, and the external AST source is
// our chained AST reader, we can just write out the DeclIDs. Otherwise,
// we need to resolve them to actual declarations.
- if (Writer.Chain != Writer.Context->getExternalSource() &&
- Common->LazySpecializations) {
+ if (Writer.Chain != Writer.Context->getExternalSource() && Writer.Chain &&
+ Writer.Chain->getLoadedSpecializationsLookupTables(D)) {
D->LoadLazySpecializations();
- assert(!Common->LazySpecializations);
+ assert(!Writer.Chain->getLoadedSpecializationsLookupTables(D));
}
- using LazySpecializationInfo =
- RedeclarableTemplateDecl::LazySpecializationInfo;
- ArrayRef<LazySpecializationInfo> LazySpecializations;
- if (auto *LS = Common->LazySpecializations)
- LazySpecializations = llvm::ArrayRef(LS + 1, LS[0].DeclID);
-
- // Add a slot to the record for the number of specializations.
- unsigned I = Record.size();
- Record.push_back(0);
-
// AddFirstDeclFromEachModule might trigger deserialization, invalidating
// *Specializations iterators.
llvm::SmallVector<const Decl*, 16> Specs;
@@ -288,21 +262,6 @@ namespace clang {
AddFirstSpecializationDeclFromEachModule(D, SpecsInOnDiskMap);
}
- // We don't need to insert LazySpecializations to SpecsInOnDiskMap,
- // since we'll handle that in GenerateSpecializationInfoLookupTable.
- for (auto &SpecInfo : LazySpecializations) {
- Record.push_back(SpecInfo.DeclID);
- Record.push_back(SpecInfo.ODRHash);
- Record.push_back(SpecInfo.IsPartial);
- }
-
- // Update the size entry we added earlier. We linerized the
- // LazySpecializationInfo members and we need to adjust the size as we
- // will read them always together.
- assert((Record.size() - I - 1) % 3 == 0 &&
- "Must be divisible by LazySpecializationInfo count!");
- Record[I] = (Record.size() - I - 1) / 3;
-
Record.AddOffset(
Writer.WriteSpecializationInfoLookupTable(D, SpecsInOnDiskMap));
}
@@ -325,9 +284,6 @@ namespace clang {
if (Writer.getFirstLocalDecl(Specialization) != Specialization)
return;
- Writer.DeclUpdates[Template].push_back(ASTWriter::DeclUpdate(
- UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION, Specialization));
-
Writer.SpecializationsUpdates[cast<NamedDecl>(Template)].push_back(
cast<NamedDecl>(Specialization));
}
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