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Pass a std::unique_ptr to IRMover::move. 

It was already the one "destroying" the source module, now the API
reflects that.

llvm-svn: 260989
This commit is contained in:
Rafael Espindola 2016-02-16 18:50:12 +00:00
parent aadc89c25d
commit 40358fb86f
6 changed files with 63 additions and 62 deletions
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4
llvm/include/llvm/Linker/IRMover.h
View File

@ -58,9 +58,9 @@ public:
IRMover(Module &M);
typedef std::function<void(GlobalValue &)> ValueAdder;
/// Move in the provide values. The source is destroyed.
/// Move in the provide values.
/// Returns true on error.
bool move(Module &Src, ArrayRef<GlobalValue *> ValuesToLink,
bool move(std::unique_ptr<Module> Src, ArrayRef<GlobalValue *> ValuesToLink,
std::function<void(GlobalValue &GV, ValueAdder Add)> AddLazyFor,
DenseMap<unsigned, MDNode *> *ValIDToTempMDMap = nullptr,
bool IsMetadataLinkingPostpass = false);

5
llvm/include/llvm/Linker/Linker.h
View File

@ -54,12 +54,11 @@ public:
static bool linkModules(Module &Dest, std::unique_ptr<Module> Src,
unsigned Flags = Flags::None);
/// \brief Link metadata from \p Src into the composite. The source is
/// destroyed.
/// \brief Link metadata from \p Src into the composite.
///
/// The \p ValIDToTempMDMap sound have been populated earlier during function
/// importing from \p Src.
bool linkInMetadata(Module &Src,
bool linkInMetadata(std::unique_ptr<Module> Src,
DenseMap<unsigned, MDNode *> *ValIDToTempMDMap);
};

74
llvm/lib/Linker/IRMover.cpp
View File

@ -374,7 +374,7 @@ public:
/// from SrcM to DstM.
class IRLinker {
Module &DstM;
Module &SrcM;
std::unique_ptr<Module> SrcM;
std::function<void(GlobalValue &, IRMover::ValueAdder)> AddLazyFor;
@ -433,13 +433,13 @@ class IRLinker {
/// Helper method for setting a message and returning an error code.
bool emitError(const Twine &Message) {
SrcM.getContext().diagnose(LinkDiagnosticInfo(DS_Error, Message));
SrcM->getContext().diagnose(LinkDiagnosticInfo(DS_Error, Message));
HasError = true;
return true;
}
void emitWarning(const Twine &Message) {
SrcM.getContext().diagnose(LinkDiagnosticInfo(DS_Warning, Message));
SrcM->getContext().diagnose(LinkDiagnosticInfo(DS_Warning, Message));
}
/// Check whether we should be linking metadata from the source module.
@ -512,12 +512,12 @@ class IRLinker {
void stripNullSubprograms(DICompileUnit *CU);
public:
IRLinker(Module &DstM, IRMover::IdentifiedStructTypeSet &Set, Module &SrcM,
ArrayRef<GlobalValue *> ValuesToLink,
IRLinker(Module &DstM, IRMover::IdentifiedStructTypeSet &Set,
std::unique_ptr<Module> SrcM, ArrayRef<GlobalValue *> ValuesToLink,
std::function<void(GlobalValue &, IRMover::ValueAdder)> AddLazyFor,
DenseMap<unsigned, MDNode *> *ValIDToTempMDMap = nullptr,
bool IsMetadataLinkingPostpass = false)
: DstM(DstM), SrcM(SrcM), AddLazyFor(AddLazyFor), TypeMap(Set),
: DstM(DstM), SrcM(std::move(SrcM)), AddLazyFor(AddLazyFor), TypeMap(Set),
GValMaterializer(this), LValMaterializer(this),
IsMetadataLinkingPostpass(IsMetadataLinkingPostpass),
ValIDToTempMDMap(ValIDToTempMDMap) {
@ -796,7 +796,7 @@ GlobalValue *IRLinker::copyGlobalValueProto(const GlobalValue *SGV,
/// types 'Foo' but one got renamed when the module was loaded into the same
/// LLVMContext.
void IRLinker::computeTypeMapping() {
for (GlobalValue &SGV : SrcM.globals()) {
for (GlobalValue &SGV : SrcM->globals()) {
GlobalValue *DGV = getLinkedToGlobal(&SGV);
if (!DGV)
continue;
@ -812,11 +812,11 @@ void IRLinker::computeTypeMapping() {
TypeMap.addTypeMapping(DAT->getElementType(), SAT->getElementType());
}
for (GlobalValue &SGV : SrcM)
for (GlobalValue &SGV : *SrcM)
if (GlobalValue *DGV = getLinkedToGlobal(&SGV))
TypeMap.addTypeMapping(DGV->getType(), SGV.getType());
for (GlobalValue &SGV : SrcM.aliases())
for (GlobalValue &SGV : SrcM->aliases())
if (GlobalValue *DGV = getLinkedToGlobal(&SGV))
TypeMap.addTypeMapping(DGV->getType(), SGV.getType());
@ -824,7 +824,7 @@ void IRLinker::computeTypeMapping() {
// At this point, the destination module may have a type "%foo = { i32 }" for
// example. When the source module got loaded into the same LLVMContext, if
// it had the same type, it would have been renamed to "%foo.42 = { i32 }".
std::vector<StructType *> Types = SrcM.getIdentifiedStructTypes();
std::vector<StructType *> Types = SrcM->getIdentifiedStructTypes();
for (StructType *ST : Types) {
if (!ST->hasName())
continue;
@ -1126,8 +1126,8 @@ bool IRLinker::linkFunctionBody(Function &Dst, Function &Src) {
// a function and before remapping metadata on instructions below
// in RemapInstruction, as the saved mapping is used to handle
// the temporary metadata hanging off instructions.
SrcM.getMaterializer()->saveMetadataList(MetadataToIDs,
/* OnlyTempMD = */ true);
SrcM->getMaterializer()->saveMetadataList(MetadataToIDs,
/* OnlyTempMD = */ true);
// Link in the prefix data.
if (Src.hasPrefixData())
@ -1218,7 +1218,7 @@ void IRLinker::findReachedSubprograms(
void IRLinker::findNeededSubprograms() {
// Track unneeded nodes to make it simpler to handle the case
// where we are checking if an already-mapped SP is needed.
NamedMDNode *CompileUnits = SrcM.getNamedMetadata("llvm.dbg.cu");
NamedMDNode *CompileUnits = SrcM->getNamedMetadata("llvm.dbg.cu");
if (!CompileUnits)
return;
for (unsigned I = 0, E = CompileUnits->getNumOperands(); I != E; ++I) {
@ -1290,8 +1290,8 @@ void IRLinker::stripNullSubprograms(DICompileUnit *CU) {
/// Insert all of the named MDNodes in Src into the Dest module.
void IRLinker::linkNamedMDNodes() {
findNeededSubprograms();
const NamedMDNode *SrcModFlags = SrcM.getModuleFlagsMetadata();
for (const NamedMDNode &NMD : SrcM.named_metadata()) {
const NamedMDNode *SrcModFlags = SrcM->getModuleFlagsMetadata();
for (const NamedMDNode &NMD : SrcM->named_metadata()) {
// Don't link module flags here. Do them separately.
if (&NMD == SrcModFlags)
continue;
@ -1314,7 +1314,7 @@ void IRLinker::linkNamedMDNodes() {
/// Merge the linker flags in Src into the Dest module.
bool IRLinker::linkModuleFlagsMetadata() {
// If the source module has no module flags, we are done.
const NamedMDNode *SrcModFlags = SrcM.getModuleFlagsMetadata();
const NamedMDNode *SrcModFlags = SrcM->getModuleFlagsMetadata();
if (!SrcModFlags)
return false;
@ -1495,37 +1495,38 @@ bool IRLinker::run() {
// Inherit the target data from the source module if the destination module
// doesn't have one already.
if (DstM.getDataLayout().isDefault())
DstM.setDataLayout(SrcM.getDataLayout());
DstM.setDataLayout(SrcM->getDataLayout());
if (SrcM.getDataLayout() != DstM.getDataLayout()) {
if (SrcM->getDataLayout() != DstM.getDataLayout()) {
emitWarning("Linking two modules of different data layouts: '" +
SrcM.getModuleIdentifier() + "' is '" +
SrcM.getDataLayoutStr() + "' whereas '" +
SrcM->getModuleIdentifier() + "' is '" +
SrcM->getDataLayoutStr() + "' whereas '" +
DstM.getModuleIdentifier() + "' is '" +
DstM.getDataLayoutStr() + "'\n");
}
// Copy the target triple from the source to dest if the dest's is empty.
if (DstM.getTargetTriple().empty() && !SrcM.getTargetTriple().empty())
DstM.setTargetTriple(SrcM.getTargetTriple());
if (DstM.getTargetTriple().empty() && !SrcM->getTargetTriple().empty())
DstM.setTargetTriple(SrcM->getTargetTriple());
Triple SrcTriple(SrcM.getTargetTriple()), DstTriple(DstM.getTargetTriple());
Triple SrcTriple(SrcM->getTargetTriple()), DstTriple(DstM.getTargetTriple());
if (!SrcM.getTargetTriple().empty() && !triplesMatch(SrcTriple, DstTriple))
if (!SrcM->getTargetTriple().empty() && !triplesMatch(SrcTriple, DstTriple))
emitWarning("Linking two modules of different target triples: " +
SrcM.getModuleIdentifier() + "' is '" + SrcM.getTargetTriple() +
"' whereas '" + DstM.getModuleIdentifier() + "' is '" +
DstM.getTargetTriple() + "'\n");
SrcM->getModuleIdentifier() + "' is '" +
SrcM->getTargetTriple() + "' whereas '" +
DstM.getModuleIdentifier() + "' is '" + DstM.getTargetTriple() +
"'\n");
DstM.setTargetTriple(mergeTriples(SrcTriple, DstTriple));
// Append the module inline asm string.
if (!SrcM.getModuleInlineAsm().empty()) {
if (!SrcM->getModuleInlineAsm().empty()) {
if (DstM.getModuleInlineAsm().empty())
DstM.setModuleInlineAsm(SrcM.getModuleInlineAsm());
DstM.setModuleInlineAsm(SrcM->getModuleInlineAsm());
else
DstM.setModuleInlineAsm(DstM.getModuleInlineAsm() + "\n" +
SrcM.getModuleInlineAsm());
SrcM->getModuleInlineAsm());
}
// Loop over all of the linked values to compute type mappings.
@ -1560,10 +1561,10 @@ bool IRLinker::run() {
// we don't actually link anything from source.
if (IsMetadataLinkingPostpass) {
// Ensure metadata materialized
if (SrcM.getMaterializer()->materializeMetadata())
if (SrcM->getMaterializer()->materializeMetadata())
return true;
SrcM.getMaterializer()->saveMetadataList(MetadataToIDs,
/* OnlyTempMD = */ false);
SrcM->getMaterializer()->saveMetadataList(MetadataToIDs,
/* OnlyTempMD = */ false);
}
linkNamedMDNodes();
@ -1694,12 +1695,13 @@ IRMover::IRMover(Module &M) : Composite(M) {
}
bool IRMover::move(
Module &Src, ArrayRef<GlobalValue *> ValuesToLink,
std::unique_ptr<Module> Src, ArrayRef<GlobalValue *> ValuesToLink,
std::function<void(GlobalValue &, ValueAdder Add)> AddLazyFor,
DenseMap<unsigned, MDNode *> *ValIDToTempMDMap,
bool IsMetadataLinkingPostpass) {
IRLinker TheIRLinker(Composite, IdentifiedStructTypes, Src, ValuesToLink,
AddLazyFor, ValIDToTempMDMap, IsMetadataLinkingPostpass);
IRLinker TheIRLinker(Composite, IdentifiedStructTypes, std::move(Src),
ValuesToLink, AddLazyFor, ValIDToTempMDMap,
IsMetadataLinkingPostpass);
bool RetCode = TheIRLinker.run();
Composite.dropTriviallyDeadConstantArrays();
return RetCode;

38
llvm/lib/Linker/LinkModules.cpp
View File

@ -27,7 +27,7 @@ namespace {
/// entrypoint for this file.
class ModuleLinker {
IRMover &Mover;
Module &SrcM;
std::unique_ptr<Module> SrcM;
SetVector<GlobalValue *> ValuesToLink;
StringSet<> Internalize;
@ -71,7 +71,7 @@ class ModuleLinker {
/// Should we have mover and linker error diag info?
bool emitError(const Twine &Message) {
SrcM.getContext().diagnose(LinkDiagnosticInfo(DS_Error, Message));
SrcM->getContext().diagnose(LinkDiagnosticInfo(DS_Error, Message));
return true;
}
@ -123,11 +123,11 @@ class ModuleLinker {
bool doImportAsDefinition(const GlobalValue *SGV);
public:
ModuleLinker(IRMover &Mover, Module &SrcM, unsigned Flags,
ModuleLinker(IRMover &Mover, std::unique_ptr<Module> SrcM, unsigned Flags,
const FunctionInfoIndex *Index = nullptr,
DenseSet<const GlobalValue *> *FunctionsToImport = nullptr,
DenseMap<unsigned, MDNode *> *ValIDToTempMDMap = nullptr)
: Mover(Mover), SrcM(SrcM), Flags(Flags), ImportIndex(Index),
: Mover(Mover), SrcM(std::move(SrcM)), Flags(Flags), ImportIndex(Index),
FunctionsToImport(FunctionsToImport),
ValIDToTempMDMap(ValIDToTempMDMap) {
assert((ImportIndex || !FunctionsToImport) &&
@ -137,7 +137,7 @@ public:
// backend compilation, and we need to see if it has functions that
// may be exported to another backend compilation.
if (ImportIndex && !FunctionsToImport)
HasExportedFunctions = ImportIndex->hasExportedFunctions(SrcM);
HasExportedFunctions = ImportIndex->hasExportedFunctions(*this->SrcM);
}
bool run();
@ -221,11 +221,11 @@ bool ModuleLinker::computeResultingSelectionKind(StringRef ComdatName,
const GlobalVariable *DstGV;
const GlobalVariable *SrcGV;
if (getComdatLeader(DstM, ComdatName, DstGV) ||
getComdatLeader(SrcM, ComdatName, SrcGV))
getComdatLeader(*SrcM, ComdatName, SrcGV))
return true;
const DataLayout &DstDL = DstM.getDataLayout();
const DataLayout &SrcDL = SrcM.getDataLayout();
const DataLayout &SrcDL = SrcM->getDataLayout();
uint64_t DstSize = DstDL.getTypeAllocSize(DstGV->getValueType());
uint64_t SrcSize = SrcDL.getTypeAllocSize(SrcGV->getValueType());
if (Result == Comdat::SelectionKind::ExactMatch) {
@ -471,7 +471,7 @@ void ModuleLinker::addLazyFor(GlobalValue &GV, IRMover::ValueAdder Add) {
}
bool ModuleLinker::run() {
for (const auto &SMEC : SrcM.getComdatSymbolTable()) {
for (const auto &SMEC : SrcM->getComdatSymbolTable()) {
const Comdat &C = SMEC.getValue();
if (ComdatsChosen.count(&C))
continue;
@ -482,34 +482,34 @@ bool ModuleLinker::run() {
ComdatsChosen[&C] = std::make_pair(SK, LinkFromSrc);
}
for (GlobalVariable &GV : SrcM.globals())
for (GlobalVariable &GV : SrcM->globals())
if (const Comdat *SC = GV.getComdat())
ComdatMembers[SC].push_back(&GV);
for (Function &SF : SrcM)
for (Function &SF : *SrcM)
if (const Comdat *SC = SF.getComdat())
ComdatMembers[SC].push_back(&SF);
for (GlobalAlias &GA : SrcM.aliases())
for (GlobalAlias &GA : SrcM->aliases())
if (const Comdat *SC = GA.getComdat())
ComdatMembers[SC].push_back(&GA);
// Insert all of the globals in src into the DstM module... without linking
// initializers (which could refer to functions not yet mapped over).
for (GlobalVariable &GV : SrcM.globals())
for (GlobalVariable &GV : SrcM->globals())
if (linkIfNeeded(GV))
return true;
for (Function &SF : SrcM)
for (Function &SF : *SrcM)
if (linkIfNeeded(SF))
return true;
for (GlobalAlias &GA : SrcM.aliases())
for (GlobalAlias &GA : SrcM->aliases())
if (linkIfNeeded(GA))
return true;
if (ImportIndex) {
FunctionImportGlobalProcessing ThinLTOProcessing(SrcM, ImportIndex,
FunctionImportGlobalProcessing ThinLTOProcessing(*SrcM, ImportIndex,
FunctionsToImport);
if (ThinLTOProcessing.run())
return true;
@ -531,7 +531,7 @@ bool ModuleLinker::run() {
Internalize.insert(GV->getName());
}
if (Mover.move(SrcM, ValuesToLink.getArrayRef(),
if (Mover.move(std::move(SrcM), ValuesToLink.getArrayRef(),
[this](GlobalValue &GV, IRMover::ValueAdder Add) {
addLazyFor(GV, Add);
},
@ -552,16 +552,16 @@ bool Linker::linkInModule(std::unique_ptr<Module> Src, unsigned Flags,
const FunctionInfoIndex *Index,
DenseSet<const GlobalValue *> *FunctionsToImport,
DenseMap<unsigned, MDNode *> *ValIDToTempMDMap) {
ModuleLinker ModLinker(Mover, *Src, Flags, Index, FunctionsToImport,
ModuleLinker ModLinker(Mover, std::move(Src), Flags, Index, FunctionsToImport,
ValIDToTempMDMap);
return ModLinker.run();
}
bool Linker::linkInMetadata(Module &Src,
bool Linker::linkInMetadata(std::unique_ptr<Module> Src,
DenseMap<unsigned, MDNode *> *ValIDToTempMDMap) {
SetVector<GlobalValue *> ValuesToLink;
if (Mover.move(
Src, ValuesToLink.getArrayRef(),
std::move(Src), ValuesToLink.getArrayRef(),
[this](GlobalValue &GV, IRMover::ValueAdder Add) { assert(false); },
ValIDToTempMDMap, true))
return true;

2
llvm/tools/gold/gold-plugin.cpp
View File

@ -906,7 +906,7 @@ static ld_plugin_status allSymbolsReadHook(raw_fd_ostream *ApiFile) {
else if (M->getTargetTriple().empty())
M->setTargetTriple(DefaultTriple);
if (L.move(*M, Keep, [](GlobalValue &, IRMover::ValueAdder) {}))
if (L.move(std::move(M), Keep, [](GlobalValue &, IRMover::ValueAdder) {}))
message(LDPL_FATAL, "Failed to link module");
}

2
llvm/tools/llvm-link/llvm-link.cpp
View File

@ -236,7 +236,7 @@ static bool importFunctions(const char *argv0, LLVMContext &Context,
}
// Link in all necessary metadata from this module.
if (L.linkInMetadata(*M, SME.getValue().get()))
if (L.linkInMetadata(std::move(M), SME.getValue().get()))
return false;
}
return true;