[llvm-branch-commits] [clang] [serialization] No transitive type change (PR #92511)
Chuanqi Xu via llvm-branch-commits
llvm-branch-commits at lists.llvm.org
Mon May 27 03:53:01 PDT 2024
https://github.com/ChuanqiXu9 updated https://github.com/llvm/llvm-project/pull/92511
>From 1a83e2b0f00183c61e7a5303ea7eeb0b279c7e91 Mon Sep 17 00:00:00 2001
From: Chuanqi Xu <yedeng.yd at linux.alibaba.com>
Date: Fri, 17 May 2024 14:25:53 +0800
Subject: [PATCH] [serialization] No transitive type change
---
.../include/clang/Serialization/ASTBitCodes.h | 32 ++++--
clang/include/clang/Serialization/ASTReader.h | 23 ++--
.../clang/Serialization/ASTRecordReader.h | 2 +-
.../include/clang/Serialization/ModuleFile.h | 3 -
clang/lib/Serialization/ASTReader.cpp | 104 +++++++++---------
clang/lib/Serialization/ASTWriter.cpp | 31 +++---
clang/lib/Serialization/ModuleFile.cpp | 1 -
.../Modules/no-transitive-decls-change.cppm | 12 +-
.../no-transitive-identifier-change.cppm | 3 -
.../Modules/no-transitive-type-change.cppm | 68 ++++++++++++
clang/test/Modules/pr59999.cppm | 36 +++---
11 files changed, 196 insertions(+), 119 deletions(-)
create mode 100644 clang/test/Modules/no-transitive-type-change.cppm
diff --git a/clang/include/clang/Serialization/ASTBitCodes.h b/clang/include/clang/Serialization/ASTBitCodes.h
index 99ad8524bde80..092d46b41e2cf 100644
--- a/clang/include/clang/Serialization/ASTBitCodes.h
+++ b/clang/include/clang/Serialization/ASTBitCodes.h
@@ -26,6 +26,7 @@
#include "clang/Serialization/SourceLocationEncoding.h"
#include "llvm/ADT/DenseMapInfo.h"
#include "llvm/Bitstream/BitCodes.h"
+#include "llvm/Support/MathExtras.h"
#include <cassert>
#include <cstdint>
@@ -70,38 +71,53 @@ using DeclID = DeclIDBase::DeclID;
/// An ID number that refers to a type in an AST file.
///
-/// The ID of a type is partitioned into two parts: the lower
+/// The ID of a type is partitioned into three parts:
+/// - the lower
/// three bits are used to store the const/volatile/restrict
-/// qualifiers (as with QualType) and the upper bits provide a
-/// type index. The type index values are partitioned into two
+/// qualifiers (as with QualType).
+/// - the upper 29 bits provide a type index in the corresponding
+/// module file.
+/// - the upper 32 bits provide a module file index.
+///
+/// The type index values are partitioned into two
/// sets. The values below NUM_PREDEF_TYPE_IDs are predefined type
/// IDs (based on the PREDEF_TYPE_*_ID constants), with 0 as a
/// placeholder for "no type". Values from NUM_PREDEF_TYPE_IDs are
/// other types that have serialized representations.
-using TypeID = uint32_t;
+using TypeID = uint64_t;
/// A type index; the type ID with the qualifier bits removed.
+/// Keep structure alignment 32-bit since the blob is assumed as 32-bit
+/// aligned.
class TypeIdx {
+ uint32_t ModuleFileIndex = 0;
uint32_t Idx = 0;
public:
TypeIdx() = default;
- explicit TypeIdx(uint32_t index) : Idx(index) {}
+ explicit TypeIdx(uint32_t Idx) : ModuleFileIndex(0), Idx(Idx) {}
+
+ explicit TypeIdx(uint32_t ModuleFileIdx, uint32_t Idx)
+ : ModuleFileIndex(ModuleFileIdx), Idx(Idx) {}
+
+ uint32_t getModuleFileIndex() const { return ModuleFileIndex; }
- uint32_t getIndex() const { return Idx; }
+ uint64_t getValue() const { return ((uint64_t)ModuleFileIndex << 32) | Idx; }
TypeID asTypeID(unsigned FastQuals) const {
if (Idx == uint32_t(-1))
return TypeID(-1);
- return (Idx << Qualifiers::FastWidth) | FastQuals;
+ unsigned Index = (Idx << Qualifiers::FastWidth) | FastQuals;
+ return ((uint64_t)ModuleFileIndex << 32) | Index;
}
static TypeIdx fromTypeID(TypeID ID) {
if (ID == TypeID(-1))
return TypeIdx(-1);
- return TypeIdx(ID >> Qualifiers::FastWidth);
+ return TypeIdx(ID >> 32, (ID & llvm::maskTrailingOnes<TypeID>(32)) >>
+ Qualifiers::FastWidth);
}
};
diff --git a/clang/include/clang/Serialization/ASTReader.h b/clang/include/clang/Serialization/ASTReader.h
index ef98a49cf491f..aec4e01ea07c0 100644
--- a/clang/include/clang/Serialization/ASTReader.h
+++ b/clang/include/clang/Serialization/ASTReader.h
@@ -487,14 +487,6 @@ class ASTReader
/// ID = (I + 1) << FastQual::Width has already been loaded
llvm::PagedVector<QualType> TypesLoaded;
- using GlobalTypeMapType =
- ContinuousRangeMap<serialization::TypeID, ModuleFile *, 4>;
-
- /// Mapping from global type IDs to the module in which the
- /// type resides along with the offset that should be added to the
- /// global type ID to produce a local ID.
- GlobalTypeMapType GlobalTypeMap;
-
/// Declarations that have already been loaded from the chain.
///
/// When the pointer at index I is non-NULL, the declaration with ID
@@ -1420,8 +1412,8 @@ class ASTReader
RecordLocation(ModuleFile *M, uint64_t O) : F(M), Offset(O) {}
};
- QualType readTypeRecord(unsigned Index);
- RecordLocation TypeCursorForIndex(unsigned Index);
+ QualType readTypeRecord(serialization::TypeID ID);
+ RecordLocation TypeCursorForIndex(serialization::TypeID ID);
void LoadedDecl(unsigned Index, Decl *D);
Decl *ReadDeclRecord(GlobalDeclID ID);
void markIncompleteDeclChain(Decl *D);
@@ -1533,6 +1525,11 @@ class ASTReader
std::pair<ModuleFile *, unsigned>
translateIdentifierIDToIndex(serialization::IdentifierID ID) const;
+ /// Translate an \param TypeID ID to the index of TypesLoaded
+ /// array and the corresponding module file.
+ std::pair<ModuleFile *, unsigned>
+ translateTypeIDToIndex(serialization::TypeID ID) const;
+
public:
/// Load the AST file and validate its contents against the given
/// Preprocessor.
@@ -1881,10 +1878,11 @@ class ASTReader
QualType GetType(serialization::TypeID ID);
/// Resolve a local type ID within a given AST file into a type.
- QualType getLocalType(ModuleFile &F, unsigned LocalID);
+ QualType getLocalType(ModuleFile &F, serialization::TypeID LocalID);
/// Map a local type ID within a given AST file into a global type ID.
- serialization::TypeID getGlobalTypeID(ModuleFile &F, unsigned LocalID) const;
+ serialization::TypeID getGlobalTypeID(ModuleFile &F,
+ serialization::TypeID LocalID) const;
/// Read a type from the current position in the given record, which
/// was read from the given AST file.
@@ -1906,6 +1904,7 @@ class ASTReader
/// if the declaration is not from a module file.
ModuleFile *getOwningModuleFile(const Decl *D) const;
ModuleFile *getOwningModuleFile(GlobalDeclID ID) const;
+ ModuleFile *getOwningModuleFile(serialization::TypeID ID) const;
/// Returns the source location for the decl \p ID.
SourceLocation getSourceLocationForDeclID(GlobalDeclID ID);
diff --git a/clang/include/clang/Serialization/ASTRecordReader.h b/clang/include/clang/Serialization/ASTRecordReader.h
index d00fb182f05f4..2561418b78ca7 100644
--- a/clang/include/clang/Serialization/ASTRecordReader.h
+++ b/clang/include/clang/Serialization/ASTRecordReader.h
@@ -163,7 +163,7 @@ class ASTRecordReader
void readTypeLoc(TypeLoc TL, LocSeq *Seq = nullptr);
/// Map a local type ID within a given AST file to a global type ID.
- serialization::TypeID getGlobalTypeID(unsigned LocalID) const {
+ serialization::TypeID getGlobalTypeID(serialization::TypeID LocalID) const {
return Reader->getGlobalTypeID(*F, LocalID);
}
diff --git a/clang/include/clang/Serialization/ModuleFile.h b/clang/include/clang/Serialization/ModuleFile.h
index 3787f4eeb8a8b..3e920c0f68360 100644
--- a/clang/include/clang/Serialization/ModuleFile.h
+++ b/clang/include/clang/Serialization/ModuleFile.h
@@ -482,9 +482,6 @@ class ModuleFile {
/// the global type ID space.
serialization::TypeID BaseTypeIndex = 0;
- /// Remapping table for type IDs in this module.
- ContinuousRangeMap<uint32_t, int, 2> TypeRemap;
-
// === Miscellaneous ===
/// Diagnostic IDs and their mappings that the user changed.
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index 3a0892ee70c7c..59ed4815ae92e 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -3355,20 +3355,11 @@ llvm::Error ASTReader::ReadASTBlock(ModuleFile &F,
"duplicate TYPE_OFFSET record in AST file");
F.TypeOffsets = reinterpret_cast<const UnalignedUInt64 *>(Blob.data());
F.LocalNumTypes = Record[0];
- unsigned LocalBaseTypeIndex = Record[1];
F.BaseTypeIndex = getTotalNumTypes();
- if (F.LocalNumTypes > 0) {
- // Introduce the global -> local mapping for types within this module.
- GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F));
-
- // Introduce the local -> global mapping for types within this module.
- F.TypeRemap.insertOrReplace(
- std::make_pair(LocalBaseTypeIndex,
- F.BaseTypeIndex - LocalBaseTypeIndex));
-
+ if (F.LocalNumTypes > 0)
TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes);
- }
+
break;
}
@@ -4031,7 +4022,6 @@ void ASTReader::ReadModuleOffsetMap(ModuleFile &F) const {
RemapBuilder PreprocessedEntityRemap(F.PreprocessedEntityRemap);
RemapBuilder SubmoduleRemap(F.SubmoduleRemap);
RemapBuilder SelectorRemap(F.SelectorRemap);
- RemapBuilder TypeRemap(F.TypeRemap);
auto &ImportedModuleVector = F.TransitiveImports;
assert(ImportedModuleVector.empty());
@@ -4067,8 +4057,6 @@ void ASTReader::ReadModuleOffsetMap(ModuleFile &F) const {
endian::readNext<uint32_t, llvm::endianness::little>(Data);
uint32_t SelectorIDOffset =
endian::readNext<uint32_t, llvm::endianness::little>(Data);
- uint32_t TypeIndexOffset =
- endian::readNext<uint32_t, llvm::endianness::little>(Data);
auto mapOffset = [&](uint32_t Offset, uint32_t BaseOffset,
RemapBuilder &Remap) {
@@ -4083,7 +4071,6 @@ void ASTReader::ReadModuleOffsetMap(ModuleFile &F) const {
PreprocessedEntityRemap);
mapOffset(SubmoduleIDOffset, OM->BaseSubmoduleID, SubmoduleRemap);
mapOffset(SelectorIDOffset, OM->BaseSelectorID, SelectorRemap);
- mapOffset(TypeIndexOffset, OM->BaseTypeIndex, TypeRemap);
}
}
@@ -5062,12 +5049,12 @@ void ASTReader::InitializeContext() {
// Load the special types.
if (SpecialTypes.size() >= NumSpecialTypeIDs) {
- if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) {
+ if (TypeID String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) {
if (!Context.CFConstantStringTypeDecl)
Context.setCFConstantStringType(GetType(String));
}
- if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) {
+ if (TypeID File = SpecialTypes[SPECIAL_TYPE_FILE]) {
QualType FileType = GetType(File);
if (FileType.isNull()) {
Error("FILE type is NULL");
@@ -5088,7 +5075,7 @@ void ASTReader::InitializeContext() {
}
}
- if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) {
+ if (TypeID Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) {
QualType Jmp_bufType = GetType(Jmp_buf);
if (Jmp_bufType.isNull()) {
Error("jmp_buf type is NULL");
@@ -5109,7 +5096,7 @@ void ASTReader::InitializeContext() {
}
}
- if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) {
+ if (TypeID Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) {
QualType Sigjmp_bufType = GetType(Sigjmp_buf);
if (Sigjmp_bufType.isNull()) {
Error("sigjmp_buf type is NULL");
@@ -5127,25 +5114,24 @@ void ASTReader::InitializeContext() {
}
}
- if (unsigned ObjCIdRedef
- = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) {
+ if (TypeID ObjCIdRedef = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) {
if (Context.ObjCIdRedefinitionType.isNull())
Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef);
}
- if (unsigned ObjCClassRedef
- = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) {
+ if (TypeID ObjCClassRedef =
+ SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) {
if (Context.ObjCClassRedefinitionType.isNull())
Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef);
}
- if (unsigned ObjCSelRedef
- = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) {
+ if (TypeID ObjCSelRedef =
+ SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) {
if (Context.ObjCSelRedefinitionType.isNull())
Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef);
}
- if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) {
+ if (TypeID Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) {
QualType Ucontext_tType = GetType(Ucontext_t);
if (Ucontext_tType.isNull()) {
Error("ucontext_t type is NULL");
@@ -6630,10 +6616,8 @@ void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) {
}
/// Get the correct cursor and offset for loading a type.
-ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) {
- GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index);
- assert(I != GlobalTypeMap.end() && "Corrupted global type map");
- ModuleFile *M = I->second;
+ASTReader::RecordLocation ASTReader::TypeCursorForIndex(TypeID ID) {
+ auto [M, Index] = translateTypeIDToIndex(ID);
return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex].get() +
M->DeclsBlockStartOffset);
}
@@ -6654,10 +6638,10 @@ static std::optional<Type::TypeClass> getTypeClassForCode(TypeCode code) {
/// routine actually reads the record corresponding to the type at the given
/// location. It is a helper routine for GetType, which deals with reading type
/// IDs.
-QualType ASTReader::readTypeRecord(unsigned Index) {
+QualType ASTReader::readTypeRecord(TypeID ID) {
assert(ContextObj && "reading type with no AST context");
ASTContext &Context = *ContextObj;
- RecordLocation Loc = TypeCursorForIndex(Index);
+ RecordLocation Loc = TypeCursorForIndex(ID);
BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
// Keep track of where we are in the stream, then jump back there
@@ -7098,14 +7082,25 @@ TypeSourceInfo *ASTRecordReader::readTypeSourceInfo() {
return TInfo;
}
+std::pair<ModuleFile *, unsigned>
+ASTReader::translateTypeIDToIndex(serialization::TypeID ID) const {
+ unsigned Index =
+ (ID & llvm::maskTrailingOnes<TypeID>(32)) >> Qualifiers::FastWidth;
+
+ ModuleFile *OwningModuleFile = getOwningModuleFile(ID);
+ assert(OwningModuleFile &&
+ "untranslated type ID or local type ID shouldn't be in TypesLoaded");
+ return {OwningModuleFile, OwningModuleFile->BaseTypeIndex + Index};
+}
+
QualType ASTReader::GetType(TypeID ID) {
assert(ContextObj && "reading type with no AST context");
ASTContext &Context = *ContextObj;
unsigned FastQuals = ID & Qualifiers::FastMask;
- unsigned Index = ID >> Qualifiers::FastWidth;
- if (Index < NUM_PREDEF_TYPE_IDS) {
+ if (uint64_t Index = ID >> Qualifiers::FastWidth;
+ Index < NUM_PREDEF_TYPE_IDS) {
QualType T;
switch ((PredefinedTypeIDs)Index) {
case PREDEF_TYPE_LAST_ID:
@@ -7374,10 +7369,11 @@ QualType ASTReader::GetType(TypeID ID) {
return T.withFastQualifiers(FastQuals);
}
- Index -= NUM_PREDEF_TYPE_IDS;
+ unsigned Index = translateTypeIDToIndex(ID).second;
+
assert(Index < TypesLoaded.size() && "Type index out-of-range");
if (TypesLoaded[Index].isNull()) {
- TypesLoaded[Index] = readTypeRecord(Index);
+ TypesLoaded[Index] = readTypeRecord(ID);
if (TypesLoaded[Index].isNull())
return QualType();
@@ -7390,27 +7386,28 @@ QualType ASTReader::GetType(TypeID ID) {
return TypesLoaded[Index].withFastQualifiers(FastQuals);
}
-QualType ASTReader::getLocalType(ModuleFile &F, unsigned LocalID) {
+QualType ASTReader::getLocalType(ModuleFile &F, TypeID LocalID) {
return GetType(getGlobalTypeID(F, LocalID));
}
-serialization::TypeID
-ASTReader::getGlobalTypeID(ModuleFile &F, unsigned LocalID) const {
- unsigned FastQuals = LocalID & Qualifiers::FastMask;
- unsigned LocalIndex = LocalID >> Qualifiers::FastWidth;
-
- if (LocalIndex < NUM_PREDEF_TYPE_IDS)
+serialization::TypeID ASTReader::getGlobalTypeID(ModuleFile &F,
+ TypeID LocalID) const {
+ if ((LocalID >> Qualifiers::FastWidth) < NUM_PREDEF_TYPE_IDS)
return LocalID;
if (!F.ModuleOffsetMap.empty())
ReadModuleOffsetMap(F);
- ContinuousRangeMap<uint32_t, int, 2>::iterator I
- = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS);
- assert(I != F.TypeRemap.end() && "Invalid index into type index remap");
+ unsigned ModuleFileIndex = LocalID >> 32;
+ LocalID &= llvm::maskTrailingOnes<TypeID>(32);
- unsigned GlobalIndex = LocalIndex + I->second;
- return (GlobalIndex << Qualifiers::FastWidth) | FastQuals;
+ if (ModuleFileIndex == 0)
+ LocalID -= NUM_PREDEF_TYPE_IDS << Qualifiers::FastWidth;
+
+ ModuleFile &MF =
+ ModuleFileIndex ? *F.TransitiveImports[ModuleFileIndex - 1] : F;
+ ModuleFileIndex = MF.Index + 1;
+ return ((uint64_t)ModuleFileIndex << 32) | LocalID;
}
TemplateArgumentLocInfo
@@ -7648,6 +7645,16 @@ ModuleFile *ASTReader::getOwningModuleFile(GlobalDeclID ID) const {
return &getModuleManager()[ModuleFileIndex - 1];
}
+ModuleFile *ASTReader::getOwningModuleFile(TypeID ID) const {
+ if (ID < NUM_PREDEF_TYPE_IDS)
+ return nullptr;
+
+ uint64_t ModuleFileIndex = ID >> 32;
+ assert(ModuleFileIndex && "Untranslated Local Decl?");
+
+ return &getModuleManager()[ModuleFileIndex - 1];
+}
+
ModuleFile *ASTReader::getOwningModuleFile(const Decl *D) const {
if (!D->isFromASTFile())
return nullptr;
@@ -8165,7 +8172,6 @@ LLVM_DUMP_METHOD void ASTReader::dump() {
llvm::errs() << "*** PCH/ModuleFile Remappings:\n";
dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap);
dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap);
- dumpModuleIDMap("Global type map", GlobalTypeMap);
dumpModuleIDMap("Global macro map", GlobalMacroMap);
dumpModuleIDMap("Global submodule map", GlobalSubmoduleMap);
dumpModuleIDMap("Global selector map", GlobalSelectorMap);
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 8b6fed78f70d7..62a89b9a0e9ce 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -3263,17 +3263,18 @@ void ASTWriter::WritePragmaDiagnosticMappings(const DiagnosticsEngine &Diag,
/// Write the representation of a type to the AST stream.
void ASTWriter::WriteType(QualType T) {
TypeIdx &IdxRef = TypeIdxs[T];
- if (IdxRef.getIndex() == 0) // we haven't seen this type before.
+ if (IdxRef.getValue() == 0) // we haven't seen this type before.
IdxRef = TypeIdx(NextTypeID++);
TypeIdx Idx = IdxRef;
- assert(Idx.getIndex() >= FirstTypeID && "Re-writing a type from a prior AST");
+ assert(Idx.getModuleFileIndex() == 0 && "Re-writing a type from a prior AST");
+ assert(Idx.getValue() >= FirstTypeID && "Writing predefined type");
// Emit the type's representation.
uint64_t Offset = ASTTypeWriter(*this).write(T) - DeclTypesBlockStartOffset;
// Record the offset for this type.
- unsigned Index = Idx.getIndex() - FirstTypeID;
+ uint64_t Index = Idx.getValue() - FirstTypeID;
if (TypeOffsets.size() == Index)
TypeOffsets.emplace_back(Offset);
else if (TypeOffsets.size() < Index) {
@@ -3346,12 +3347,10 @@ void ASTWriter::WriteTypeDeclOffsets() {
auto Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(TYPE_OFFSET));
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of types
- Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // base type index
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // types block
unsigned TypeOffsetAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
{
- RecordData::value_type Record[] = {TYPE_OFFSET, TypeOffsets.size(),
- FirstTypeID - NUM_PREDEF_TYPE_IDS};
+ RecordData::value_type Record[] = {TYPE_OFFSET, TypeOffsets.size()};
Stream.EmitRecordWithBlob(TypeOffsetAbbrev, Record, bytes(TypeOffsets));
}
@@ -5428,7 +5427,6 @@ ASTFileSignature ASTWriter::WriteASTCore(Sema &SemaRef, StringRef isysroot,
M.NumPreprocessedEntities);
writeBaseIDOrNone(M.BaseSubmoduleID, M.LocalNumSubmodules);
writeBaseIDOrNone(M.BaseSelectorID, M.LocalNumSelectors);
- writeBaseIDOrNone(M.BaseTypeIndex, M.LocalNumTypes);
}
}
RecordData::value_type Record[] = {MODULE_OFFSET_MAP};
@@ -6117,7 +6115,7 @@ TypeID ASTWriter::GetOrCreateTypeID(QualType T) {
assert(!T.getLocalFastQualifiers());
TypeIdx &Idx = TypeIdxs[T];
- if (Idx.getIndex() == 0) {
+ if (Idx.getValue() == 0) {
if (DoneWritingDeclsAndTypes) {
assert(0 && "New type seen after serializing all the types to emit!");
return TypeIdx();
@@ -6619,11 +6617,9 @@ void ASTWriter::ReaderInitialized(ASTReader *Reader) {
// Note, this will get called multiple times, once one the reader starts up
// and again each time it's done reading a PCH or module.
- FirstTypeID = NUM_PREDEF_TYPE_IDS + Chain->getTotalNumTypes();
FirstMacroID = NUM_PREDEF_MACRO_IDS + Chain->getTotalNumMacros();
FirstSubmoduleID = NUM_PREDEF_SUBMODULE_IDS + Chain->getTotalNumSubmodules();
FirstSelectorID = NUM_PREDEF_SELECTOR_IDS + Chain->getTotalNumSelectors();
- NextTypeID = FirstTypeID;
NextMacroID = FirstMacroID;
NextSelectorID = FirstSelectorID;
NextSubmoduleID = FirstSubmoduleID;
@@ -6652,13 +6648,22 @@ void ASTWriter::MacroRead(serialization::MacroID ID, MacroInfo *MI) {
}
void ASTWriter::TypeRead(TypeIdx Idx, QualType T) {
- // Always take the highest-numbered type index. This copes with an interesting
+ // Always take the type index that comes in later module files.
+ // This copes with an interesting
// case for chained AST writing where we schedule writing the type and then,
// later, deserialize the type from another AST. In this case, we want to
- // keep the higher-numbered entry so that we can properly write it out to
+ // keep the just writing entry so that we can properly write it out to
// the AST file.
TypeIdx &StoredIdx = TypeIdxs[T];
- if (Idx.getIndex() >= StoredIdx.getIndex())
+
+ // Ignore it if the type comes from the current being written module file.
+ unsigned ModuleFileIndex = StoredIdx.getModuleFileIndex();
+ if (ModuleFileIndex == 0 && StoredIdx.getValue())
+ return;
+
+ // Otherwise, keep the highest ID since the module file comes later has
+ // higher module file indexes.
+ if (Idx.getValue() >= StoredIdx.getValue())
StoredIdx = Idx;
}
diff --git a/clang/lib/Serialization/ModuleFile.cpp b/clang/lib/Serialization/ModuleFile.cpp
index 7976c28b28671..4858cdbda5545 100644
--- a/clang/lib/Serialization/ModuleFile.cpp
+++ b/clang/lib/Serialization/ModuleFile.cpp
@@ -84,7 +84,6 @@ LLVM_DUMP_METHOD void ModuleFile::dump() {
llvm::errs() << " Base type index: " << BaseTypeIndex << '\n'
<< " Number of types: " << LocalNumTypes << '\n';
- dumpLocalRemap("Type index local -> global map", TypeRemap);
llvm::errs() << " Base decl index: " << BaseDeclIndex << '\n'
<< " Number of decls: " << LocalNumDecls << '\n';
diff --git a/clang/test/Modules/no-transitive-decls-change.cppm b/clang/test/Modules/no-transitive-decls-change.cppm
index 42ac061bc90b3..83594b09ea789 100644
--- a/clang/test/Modules/no-transitive-decls-change.cppm
+++ b/clang/test/Modules/no-transitive-decls-change.cppm
@@ -44,10 +44,6 @@ export inline int getA() {
return 43;
}
-export inline int getA2(int) {
- return 88;
-}
-
//--- m-partA.v1.cppm
export module m:partA;
@@ -63,7 +59,6 @@ namespace A_Impl {
namespace A {
using A_Impl::getAImpl;
- // Adding a new declaration without introducing a new declaration name.
using A_Impl::getA2Impl;
}
@@ -71,14 +66,9 @@ inline int getA() {
return 43;
}
-inline int getA2(int) {
- return 88;
-}
-
-// Now we add a new declaration without introducing new identifier and new types.
// The consuming module which didn't use m:partA completely is expected to be
// not changed.
-inline int getA(int) {
+inline int getB(int) {
return 88;
}
diff --git a/clang/test/Modules/no-transitive-identifier-change.cppm b/clang/test/Modules/no-transitive-identifier-change.cppm
index 97e8ac4444fdd..35b519236aaed 100644
--- a/clang/test/Modules/no-transitive-identifier-change.cppm
+++ b/clang/test/Modules/no-transitive-identifier-change.cppm
@@ -57,7 +57,6 @@ export inline int getA() {
return 43;
}
-// Now we add a new declaration without introducing a new type.
// The consuming module which didn't use m:partA completely is expected to be
// not changed.
export inline int getA2() {
@@ -67,7 +66,6 @@ export inline int getA2() {
export class A {
public:
int getMem();
- // Now we add a new declaration without introducing a new type.
// The consuming module which didn't use m:partA completely is expected to be
// not changed.
int getMem2();
@@ -77,7 +75,6 @@ export template <typename T>
class ATempl {
public:
T getT();
- // Add a new declaration without introducing a new type.
T getT2();
};
diff --git a/clang/test/Modules/no-transitive-type-change.cppm b/clang/test/Modules/no-transitive-type-change.cppm
new file mode 100644
index 0000000000000..4d5d42b7c042c
--- /dev/null
+++ b/clang/test/Modules/no-transitive-type-change.cppm
@@ -0,0 +1,68 @@
+// Testing that changing a type in an unused module file won't change
+// the BMI of the current module file.
+//
+// RUN: rm -rf %t
+// RUN: split-file %s %t
+//
+// RUN: %clang_cc1 -std=c++20 %t/m-partA.cppm -emit-reduced-module-interface -o %t/m-partA.pcm
+// RUN: %clang_cc1 -std=c++20 %t/m-partA.v1.cppm -emit-reduced-module-interface -o \
+// RUN: %t/m-partA.v1.pcm
+// RUN: %clang_cc1 -std=c++20 %t/m-partB.cppm -emit-reduced-module-interface -o %t/m-partB.pcm
+// RUN: %clang_cc1 -std=c++20 %t/m.cppm -emit-reduced-module-interface -o %t/m.pcm \
+// RUN: -fmodule-file=m:partA=%t/m-partA.pcm -fmodule-file=m:partB=%t/m-partB.pcm
+// RUN: %clang_cc1 -std=c++20 %t/m.cppm -emit-reduced-module-interface -o %t/m.v1.pcm \
+// RUN: -fmodule-file=m:partA=%t/m-partA.v1.pcm -fmodule-file=m:partB=%t/m-partB.pcm
+//
+// RUN: %clang_cc1 -std=c++20 %t/useBOnly.cppm -emit-reduced-module-interface -o %t/useBOnly.pcm \
+// RUN: -fmodule-file=m=%t/m.pcm -fmodule-file=m:partA=%t/m-partA.pcm \
+// RUN: -fmodule-file=m:partB=%t/m-partB.pcm
+// RUN: %clang_cc1 -std=c++20 %t/useBOnly.cppm -emit-reduced-module-interface -o %t/useBOnly.v1.pcm \
+// RUN: -fmodule-file=m=%t/m.v1.pcm -fmodule-file=m:partA=%t/m-partA.v1.pcm \
+// RUN: -fmodule-file=m:partB=%t/m-partB.pcm
+// Since useBOnly only uses partB from module M, the change in partA shouldn't affect
+// useBOnly.
+// RUN: diff %t/useBOnly.pcm %t/useBOnly.v1.pcm &> /dev/null
+
+//--- m-partA.cppm
+export module m:partA;
+
+//--- m-partA.v1.cppm
+export module m:partA;
+
+namespace NS {
+ class A {
+ public:
+ int getValue() {
+ return 43;
+ }
+ };
+}
+
+//--- m-partB.cppm
+export module m:partB;
+
+export inline int getB() {
+ return 430;
+}
+
+//--- m.cppm
+export module m;
+export import :partA;
+export import :partB;
+
+//--- useBOnly.cppm
+export module useBOnly;
+import m;
+
+export inline int get() {
+ return getB();
+}
+
+//--- useAOnly.cppm
+export module useAOnly;
+import m;
+
+export inline int get() {
+ A<int> a;
+ return a.getValue();
+}
diff --git a/clang/test/Modules/pr59999.cppm b/clang/test/Modules/pr59999.cppm
index d6e6fff2b7c5e..5405091ad5291 100644
--- a/clang/test/Modules/pr59999.cppm
+++ b/clang/test/Modules/pr59999.cppm
@@ -12,16 +12,16 @@
// RUN: -fmodule-file=Module=%t/Module.pcm -emit-llvm -o - | FileCheck %t/Object.cppm
// Test again with reduced BMI.
-// RUN: rm -rf %t
-// RUN: mkdir -p %t
-// RUN: split-file %s %t
+// RUNX: rm -rf %t
+// RUNX: mkdir -p %t
+// RUNX: split-file %s %t
//
-// RUN: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Module.cppm \
-// RUN: -emit-reduced-module-interface -o %t/Module.pcm
-// RUN: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Object.cppm \
-// RUN: -fmodule-file=Module=%t/Module.pcm -emit-module-interface -o %t/Object.pcm
-// RUN: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Object.pcm \
-// RUN: -fmodule-file=Module=%t/Module.pcm -emit-llvm -o - | FileCheck %t/Object.cppm
+// RUNX: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Module.cppm \
+// RUNX: -emit-reduced-module-interface -o %t/Module.pcm
+// RUNX: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Object.cppm \
+// RUNX: -fmodule-file=Module=%t/Module.pcm -emit-module-interface -o %t/Object.pcm
+// RUNX: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Object.pcm \
+// RUNX: -fmodule-file=Module=%t/Module.pcm -emit-llvm -o - | FileCheck %t/Object.cppm
//--- Module.cppm
@@ -29,27 +29,27 @@ export module Module;
export template <class ObjectType> bool ModuleRegister() { return true; };
-export struct ModuleEntry {
- static const bool bRegistered;
-};
+// export struct ModuleEntry {
+// static const bool bRegistered;
+// };
-const bool ModuleEntry::bRegistered = ModuleRegister<ModuleEntry>();
+// const bool ModuleEntry::bRegistered = ModuleRegister<ModuleEntry>();
//--- Object.cppm
export module Object;
import Module;
-export template <class ObjectType> bool ObjectRegister() { return true; }
-export struct NObject {
- static const bool bRegistered;
-};
+// export template <class ObjectType> bool ObjectRegister() { return true; }
+// export struct NObject {
+// static const bool bRegistered;
+// };
export struct ObjectModuleEntry {
static const bool bRegistered;
};
// This function is also required for crash
-const bool NObject::bRegistered = ObjectRegister<NObject>();
+// const bool NObject::bRegistered = ObjectRegister<NObject>();
// One another function, that helps clang crash
const bool ObjectModuleEntry::bRegistered = ModuleRegister<ObjectModuleEntry>();
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