r223803 - IR: Update clang for Metadata/Value split in r223802

Rafael EspĂ­ndola rafael.espindola at gmail.com
Wed Dec 24 05:39:00 PST 2014


Attached is the log I got with asan.

On 23 December 2014 at 20:38, Saleem Abdulrasool <compnerd at compnerd.org> wrote:
> I think I have a great reduction of this bug:
>
> %clang -target i686-linux-gnu -c %s -g -o /dev/null
>
> double _Complex f(void) {
>   double _Complex c;
>   return c;
> }
>
> It is somewhat flaky (okay pretty flaky), but, does reproduce the issue
> enough that you can bang r-enter until $debugger traps on the fault.
>
> The issue seems to be related to the emission of the debug loc in the
> epilogue, where it has an invalid sloc for the returned value.  I've not
> done a full analysis of the issue, but throwing the reproduction out there
> in case someone more familiar with this code path can immediately see the
> issue.
>
> Thanks to David for the pointer to the thread!
>
> On Sunday, December 21, 2014, Yaron Keren <yaron.keren at gmail.com> wrote:
>>
>> Ok, the last revision this example passes is r223801.
>>
>> r223802 (Metadata/Value split) until r223823 (including) don't compile
>> with Visual C++.
>> r223824 until r223857 (including) do compile but the example crashes, in a
>> different location than the LexicalBlockStack assert.
>> r223858 does not crash and fails the LexicalBlockStack assertion.
>>
>> so we first see the problem with r223858 but it may have been introduced
>> as early as r223802.
>>
>>
>> 2014-12-20 1:00 GMT+02:00 Yaron Keren <yaron.keren at gmail.com>:
>>
>> I suspect r223828 - DebugInfo: Accurate location information for complex
>> assignment‏, before it EmitStoreOfComplex was passing invalid
>> SourceLocation() into CGDebugInfo::EmitLocation which would return
>> immediately and the code path would not be exercised at all.
>>
>> It's also possible r223828 just exposed some other hidden bug.
>>
>> I won't have time for two builds to verify this today, if needed I'll
>> build first thing tommorrow.
>>
>>
>> 2014-12-20 0:36 GMT+02:00 David Blaikie <dblaikie at gmail.com>:
>>
>>
>>
>> On Fri, Dec 19, 2014 at 2:21 PM, Yaron Keren <yaron.keren at gmail.com>
>> wrote:
>>
>> I will look into creduce, looks like a very useful tool.
>>
>> The assert failing is not a clang assert but a Visual C++ header assert
>> (in debug mode only) checking empty std::vector every back() access to the
>> vector.
>> Maybe the libstdc++ std::vector runtime header does not have this assert
>> or it's not enabled?
>>
>> If I add an explicit assert for LexicalBlockStack:
>>
>>   assert(LexicalBlockStack.size());
>>   if (CurLoc == PrevLoc ||
>>       SM.getExpansionLoc(CurLoc) == SM.getExpansionLoc(PrevLoc))
>>     // New Builder may not be in sync with CGDebugInfo.
>>     if (!Builder.getCurrentDebugLocation().isUnknown() &&
>>         Builder.getCurrentDebugLocation().getScope(CGM.getLLVMContext())
>> ==
>>             LexicalBlockStack.back())
>>
>> it gets triggered with toT r224610:
>>
>>  Assertion failed: LexicalBlockStack.size(), file
>> ..\..\..\..\..\tools\clang\lib\CodeGen\CGDebugInfo.cpp, line 2648
>>
>> Could you try with this assert?
>>
>>
>> Yep, I can reproduce that, but don't know when it was introduced. Do you
>> have a revision range for when you started seeing this?
>>
>>
>>
>>
>> 2014-12-19 23:49 GMT+02:00 Yaron Keren <yaron.keren at gmail.com>:
>>
>> Thanks for checking so quickly, svn info shows r224610, I'll investigate
>> what's going on.
>>
>>
>> 2014-12-19 23:39 GMT+02:00 David Blaikie <dblaikie at gmail.com>:
>>
>>
>>
>> On Fri, Dec 19, 2014 at 1:18 PM, Yaron Keren <yaron.keren at gmail.com>
>> wrote:
>>
>> Hi,
>>
>> I have filed a C++ example triggering this.
>>
>>
>> Is this triggering on ToT clang? My patch (not this one from Duncan)
>> r224385 was reverted in r224441.
>>
>>
>> It's using boost... the source code is not long after preprocessed is
>> almost 25MB.
>>
>>
>> Just for future reference - the unpreprocessed source code length isn't
>> usually terribly important (so if you can't reduce the preprocessed source,
>> it's probably not too important to spend time reducing the unpreprocessed
>> source - you'll only be removing maybe a few hundred lines, out of the many
>> thousands that need to be reduced). Tools like creduce can help reduce the
>> preprocessed source without so much manual effort.
>>
>> In any case, I can't seem to reproduce the assertion failure from your
>> preprocessed file, nor from Francois example... (even with my patch
>> reapplied)...
>>
>> - David
>>
>>
>>
>>  http://llvm.org/PR21987
>>
>> Yaron
>>
>>
>> 2014-12-17 22:21 GMT+02:00 David Blaikie <dblaikie at gmail.com>:
>>
>> Yeah, still sounds likely that that was my change, not this one.
>>
>> On Wed, Dec 17, 2014 at 12:19 PM, Duncan P. N. Exon Smith
>> <dexonsmith at apple.com> wrote:
>>
>> So r223803 (and r223802) should have been effectively NFC (at least once
>> the follow-up bugfixes were applied).
>>
>> I didn't change the logic around LexicalBlockStack -- just changed some
>> `push_back`s to `emplace_back`s because I changed the type being held in
>> it -- and I honestly don't know how it's supposed to work.  (And I don't
>> know anything about ABIs.)
>>
>> If I'm going to help you debug this, I'll need some more guidance.
>> Ideally, you'd give me a patch and a reproduction to expose the problem
>> on ToT.  (Or maybe David has some ideas?)
>>
>> (BTW, have you done a bisection?  Are you sure this is the problematic
>> commit?)
>>
>> > On 2014-Dec-17, at 08:43, Francois Pichet <pichet2000 at gmail.com> wrote:
>> >
>> > Hi, the assert will occur for a target that use DefaultABIInfo where
>> > Complex types are returned via the ABIArgInfo::Indirect mechanism. This is
>> > the case for my out of tree target.
>> >
>> > EmitFunctionEnd will make LexicalBlockStack empty.
>> > EmitStoreOfComplex called from EmitFunctionEpilog will eventually assume
>> > a non empty LexicalBlockStack.
>> >
>> > On Tue, Dec 16, 2014 at 6:15 PM, Duncan P. N. Exon Smith
>> > <dexonsmith at apple.com> wrote:
>> > It's not reproducing for me:
>> >
>> > clang -g test.c
>> > test.c:3:8: warning: implicitly declaring library function 'casin' with
>> > type '_Complex double
>> >       (_Complex double)'
>> >    z = casin(z);
>> >        ^
>> > test.c:3:8: note: include the header <complex.h> or explicitly provide a
>> > declaration for 'casin'
>> > 1 warning generated.
>> > Undefined symbols for architecture x86_64:
>> >   "_main", referenced from:
>> >      implicit entry/start for main executable
>> > ld: symbol(s) not found for architecture x86_64
>> > clang-3.6: error: linker command failed with exit code 1 (use -v to see
>> > invocation)
>> > lrun: error: failed:
>> > /Users/dexonsmith/data/llvm.debug/debug-info/bin/clang -g test.c
>> >
>> > If you can reproduce this ToT, please file a PR with preprocessed source
>> > and
>> > the -cc1 command (usually the driver will produce these files for you)
>> > and
>> > CC me.
>> >
>> > > On 2014 Dec 16, at 12:24, Francois Pichet <pichet2000 at gmail.com>
>> > > wrote:
>> > >
>> > > Hi, I re-synced a private repo of clang/llvm lately and I am getting
>> > > an assert when compiling musl-libc with clang in debug mode, I suspect this
>> > > commit. Basically LexicalBlockStack is empty when CGDebugInfo::EmitLocation
>> > > is called.
>> > >
>> > > clang -g test.c
>> > >
>> > > here is the test.c: http://pastebin.com/zXyAknCf
>> > >
>> > > Thanks,
>> > >
>> > > On Tue, Dec 9, 2014 at 1:39 PM, Duncan P. N. Exon Smith
>> > > <dexonsmith at apple.com> wrote:
>> > > Author: dexonsmith
>> > > Date: Tue Dec  9 12:39:32 2014
>> > > New Revision: 223803
>> > >
>> > > URL: http://llvm.org/viewvc/llvm-project?rev=223803&view=rev
>> > > Log:
>> > > IR: Update clang for Metadata/Value split in r223802
>> > >
>> > > Match LLVM API changes from r223802.
>> > >
>> > > Modified:
>> > >     cfe/trunk/lib/CodeGen/CGBuiltin.cpp
>> > >     cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
>> > >     cfe/trunk/lib/CodeGen/CGDebugInfo.h
>> > >     cfe/trunk/lib/CodeGen/CGExpr.cpp
>> > >     cfe/trunk/lib/CodeGen/CGLoopInfo.cpp
>> > >     cfe/trunk/lib/CodeGen/CGObjC.cpp
>> > >     cfe/trunk/lib/CodeGen/CGObjCGNU.cpp
>> > >     cfe/trunk/lib/CodeGen/CGObjCMac.cpp
>> > >     cfe/trunk/lib/CodeGen/CGStmt.cpp
>> > >     cfe/trunk/lib/CodeGen/CodeGenFunction.cpp
>> > >     cfe/trunk/lib/CodeGen/CodeGenModule.cpp
>> > >     cfe/trunk/lib/CodeGen/CodeGenModule.h
>> > >     cfe/trunk/lib/CodeGen/SanitizerMetadata.cpp
>> > >     cfe/trunk/lib/CodeGen/TargetInfo.cpp
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
>> > > +++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Tue Dec  9 12:39:32 2014
>> > > @@ -5932,8 +5932,8 @@ Value *CodeGenFunction::EmitX86BuiltinEx
>> > >    case X86::BI__builtin_ia32_movntdq256:
>> > >    case X86::BI__builtin_ia32_movnti:
>> > >    case X86::BI__builtin_ia32_movnti64: {
>> > > -    llvm::MDNode *Node = llvm::MDNode::get(getLLVMContext(),
>> > > -                                           Builder.getInt32(1));
>> > > +    llvm::MDNode *Node = llvm::MDNode::get(
>> > > +        getLLVMContext(),
>> > > llvm::ConstantAsMetadata::get(Builder.getInt32(1)));
>> > >
>> > >      // Convert the type of the pointer to a pointer to the stored
>> > > type.
>> > >      Value *BC = Builder.CreateBitCast(Ops[0],
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.cpp?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CGDebugInfo.cpp (original)
>> > > +++ cfe/trunk/lib/CodeGen/CGDebugInfo.cpp Tue Dec  9 12:39:32 2014
>> > > @@ -126,13 +126,13 @@ void CGDebugInfo::setLocation(SourceLoca
>> > >          LBF.getScope(), getOrCreateFile(CurLoc));
>> > >      llvm::MDNode *N = D;
>> > >      LexicalBlockStack.pop_back();
>> > > -    LexicalBlockStack.push_back(N);
>> > > +    LexicalBlockStack.emplace_back(N);
>> > >    } else if (Scope.isLexicalBlock() || Scope.isSubprogram()) {
>> > >      llvm::DIDescriptor D =
>> > >          DBuilder.createLexicalBlockFile(Scope,
>> > > getOrCreateFile(CurLoc));
>> > >      llvm::MDNode *N = D;
>> > >      LexicalBlockStack.pop_back();
>> > > -    LexicalBlockStack.push_back(N);
>> > > +    LexicalBlockStack.emplace_back(N);
>> > >    }
>> > >  }
>> > >
>> > > @@ -141,10 +141,9 @@ llvm::DIScope CGDebugInfo::getContextDes
>> > >    if (!Context)
>> > >      return TheCU;
>> > >
>> > > -  llvm::DenseMap<const Decl *, llvm::WeakVH>::iterator I =
>> > > -      RegionMap.find(Context);
>> > > +  auto I = RegionMap.find(Context);
>> > >    if (I != RegionMap.end()) {
>> > > -    llvm::Value *V = I->second;
>> > > +    llvm::Metadata *V = I->second;
>> > >      return llvm::DIScope(dyn_cast_or_null<llvm::MDNode>(V));
>> > >    }
>> > >
>> > > @@ -256,18 +255,17 @@ llvm::DIFile CGDebugInfo::getOrCreateFil
>> > >
>> > >    // Cache the results.
>> > >    const char *fname = PLoc.getFilename();
>> > > -  llvm::DenseMap<const char *, llvm::WeakVH>::iterator it =
>> > > -      DIFileCache.find(fname);
>> > > +  auto it = DIFileCache.find(fname);
>> > >
>> > >    if (it != DIFileCache.end()) {
>> > >      // Verify that the information still exists.
>> > > -    if (llvm::Value *V = it->second)
>> > > +    if (llvm::Metadata *V = it->second)
>> > >        return llvm::DIFile(cast<llvm::MDNode>(V));
>> > >    }
>> > >
>> > >    llvm::DIFile F = DBuilder.createFile(PLoc.getFilename(),
>> > > getCurrentDirname());
>> > >
>> > > -  DIFileCache[fname] = F;
>> > > +  DIFileCache[fname].reset(F);
>> > >    return F;
>> > >  }
>> > >
>> > > @@ -641,7 +639,9 @@ CGDebugInfo::getOrCreateRecordFwdDecl(co
>> > >    SmallString<256> FullName = getUniqueTagTypeName(Ty, CGM, TheCU);
>> > >    llvm::DICompositeType RetTy =
>> > > DBuilder.createReplaceableForwardDecl(
>> > >        Tag, RDName, Ctx, DefUnit, Line, 0, 0, 0, FullName);
>> > > -  ReplaceMap.push_back(std::make_pair(Ty, static_cast<llvm::Value
>> > > *>(RetTy)));
>> > > +  ReplaceMap.emplace_back(
>> > > +      std::piecewise_construct, std::make_tuple(Ty),
>> > > +      std::make_tuple(static_cast<llvm::Metadata *>(RetTy)));
>> > >    return RetTy;
>> > >  }
>> > >
>> > > @@ -680,7 +680,7 @@ llvm::DIType CGDebugInfo::CreateType(con
>> > >    if (BlockLiteralGeneric)
>> > >      return BlockLiteralGeneric;
>> > >
>> > > -  SmallVector<llvm::Value *, 8> EltTys;
>> > > +  SmallVector<llvm::Metadata *, 8> EltTys;
>> > >    llvm::DIType FieldTy;
>> > >    QualType FType;
>> > >    uint64_t FieldSize, FieldOffset;
>> > > @@ -784,7 +784,7 @@ llvm::DIType CGDebugInfo::CreateType(con
>> > >
>> > >  llvm::DIType CGDebugInfo::CreateType(const FunctionType *Ty,
>> > >                                       llvm::DIFile Unit) {
>> > > -  SmallVector<llvm::Value *, 16> EltTys;
>> > > +  SmallVector<llvm::Metadata *, 16> EltTys;
>> > >
>> > >    // Add the result type at least.
>> > >    EltTys.push_back(getOrCreateType(Ty->getReturnType(), Unit));
>> > > @@ -857,10 +857,9 @@ llvm::DIType CGDebugInfo::createFieldTyp
>> > >  }
>> > >
>> > >  /// CollectRecordLambdaFields - Helper for CollectRecordFields.
>> > > -void
>> > > -CGDebugInfo::CollectRecordLambdaFields(const CXXRecordDecl *CXXDecl,
>> > > -                                       SmallVectorImpl<llvm::Value *>
>> > > &elements,
>> > > -                                       llvm::DIType RecordTy) {
>> > > +void CGDebugInfo::CollectRecordLambdaFields(
>> > > +    const CXXRecordDecl *CXXDecl, SmallVectorImpl<llvm::Metadata *>
>> > > &elements,
>> > > +    llvm::DIType RecordTy) {
>> > >    // For C++11 Lambdas a Field will be the same as a Capture, but the
>> > > Capture
>> > >    // has the name and the location of the variable so we should
>> > > iterate over
>> > >    // both concurrently.
>> > > @@ -928,14 +927,14 @@ llvm::DIDerivedType CGDebugInfo::CreateR
>> > >    unsigned Flags = getAccessFlag(Var->getAccess(), RD);
>> > >    llvm::DIDerivedType GV = DBuilder.createStaticMemberType(
>> > >        RecordTy, VName, VUnit, LineNumber, VTy, Flags, C);
>> > > -  StaticDataMemberCache[Var->getCanonicalDecl()] = llvm::WeakVH(GV);
>> > > +  StaticDataMemberCache[Var->getCanonicalDecl()].reset(GV);
>> > >    return GV;
>> > >  }
>> > >
>> > >  /// CollectRecordNormalField - Helper for CollectRecordFields.
>> > >  void CGDebugInfo::CollectRecordNormalField(
>> > >      const FieldDecl *field, uint64_t OffsetInBits, llvm::DIFile
>> > > tunit,
>> > > -    SmallVectorImpl<llvm::Value *> &elements, llvm::DIType RecordTy,
>> > > +    SmallVectorImpl<llvm::Metadata *> &elements, llvm::DIType
>> > > RecordTy,
>> > >      const RecordDecl *RD) {
>> > >    StringRef name = field->getName();
>> > >    QualType type = field->getType();
>> > > @@ -959,10 +958,10 @@ void CGDebugInfo::CollectRecordNormalFie
>> > >
>> > >  /// CollectRecordFields - A helper function to collect debug info for
>> > >  /// record fields. This is used while creating debug info entry for a
>> > > Record.
>> > > -void CGDebugInfo::CollectRecordFields(const RecordDecl *record,
>> > > -                                      llvm::DIFile tunit,
>> > > -                                      SmallVectorImpl<llvm::Value *>
>> > > &elements,
>> > > -                                      llvm::DICompositeType RecordTy)
>> > > {
>> > > +void CGDebugInfo::CollectRecordFields(
>> > > +    const RecordDecl *record, llvm::DIFile tunit,
>> > > +    SmallVectorImpl<llvm::Metadata *> &elements,
>> > > +    llvm::DICompositeType RecordTy) {
>> > >    const CXXRecordDecl *CXXDecl = dyn_cast<CXXRecordDecl>(record);
>> > >
>> > >    if (CXXDecl && CXXDecl->isLambda())
>> > > @@ -978,8 +977,7 @@ void CGDebugInfo::CollectRecordFields(co
>> > >      for (const auto *I : record->decls())
>> > >        if (const auto *V = dyn_cast<VarDecl>(I)) {
>> > >          // Reuse the existing static member declaration if one exists
>> > > -        llvm::DenseMap<const Decl *, llvm::WeakVH>::iterator MI =
>> > > -            StaticDataMemberCache.find(V->getCanonicalDecl());
>> > > +        auto MI = StaticDataMemberCache.find(V->getCanonicalDecl());
>> > >          if (MI != StaticDataMemberCache.end()) {
>> > >            assert(MI->second &&
>> > >                   "Static data member declaration should still
>> > > exist");
>> > > @@ -1019,7 +1017,7 @@ llvm::DICompositeType CGDebugInfo::getOr
>> > >        getOrCreateType(QualType(Func, 0), Unit)).getTypeArray();
>> > >    assert(Args.getNumElements() && "Invalid number of arguments!");
>> > >
>> > > -  SmallVector<llvm::Value *, 16> Elts;
>> > > +  SmallVector<llvm::Metadata *, 16> Elts;
>> > >
>> > >    // First element is always return type. For 'void' functions it is
>> > > NULL.
>> > >    Elts.push_back(Args.getElement(0));
>> > > @@ -1036,7 +1034,7 @@ llvm::DICompositeType CGDebugInfo::getOr
>> > >      llvm::DIType PointeeType = getOrCreateType(PointeeTy, Unit);
>> > >      llvm::DIType ThisPtrType =
>> > >          DBuilder.createPointerType(PointeeType, Size, Align);
>> > > -    TypeCache[ThisPtr.getAsOpaquePtr()] = ThisPtrType;
>> > > +    TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType);
>> > >      // TODO: This and the artificial type below are misleading, the
>> > >      // types aren't artificial the argument is, but the current
>> > >      // metadata doesn't represent that.
>> > > @@ -1044,7 +1042,7 @@ llvm::DICompositeType CGDebugInfo::getOr
>> > >      Elts.push_back(ThisPtrType);
>> > >    } else {
>> > >      llvm::DIType ThisPtrType = getOrCreateType(ThisPtr, Unit);
>> > > -    TypeCache[ThisPtr.getAsOpaquePtr()] = ThisPtrType;
>> > > +    TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType);
>> > >      ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType);
>> > >      Elts.push_back(ThisPtrType);
>> > >    }
>> > > @@ -1147,7 +1145,7 @@ CGDebugInfo::CreateCXXMemberFunction(con
>> > >        /* isDefinition=*/false, Virtuality, VIndex, ContainingType,
>> > > Flags,
>> > >        CGM.getLangOpts().Optimize, nullptr, TParamsArray);
>> > >
>> > > -  SPCache[Method->getCanonicalDecl()] = llvm::WeakVH(SP);
>> > > +  SPCache[Method->getCanonicalDecl()].reset(SP);
>> > >
>> > >    return SP;
>> > >  }
>> > > @@ -1157,7 +1155,7 @@ CGDebugInfo::CreateCXXMemberFunction(con
>> > >  /// a Record.
>> > >  void CGDebugInfo::CollectCXXMemberFunctions(
>> > >      const CXXRecordDecl *RD, llvm::DIFile Unit,
>> > > -    SmallVectorImpl<llvm::Value *> &EltTys, llvm::DIType RecordTy) {
>> > > +    SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType RecordTy)
>> > > {
>> > >
>> > >    // Since we want more than just the individual member decls if we
>> > >    // have templated functions iterate over every declaration to
>> > > gather
>> > > @@ -1188,7 +1186,7 @@ void CGDebugInfo::CollectCXXMemberFuncti
>> > >      auto MI = SPCache.find(Method->getCanonicalDecl());
>> > >      EltTys.push_back(MI == SPCache.end()
>> > >                           ? CreateCXXMemberFunction(Method, Unit,
>> > > RecordTy)
>> > > -                         : static_cast<llvm::Value *>(MI->second));
>> > > +                         : static_cast<llvm::Metadata
>> > > *>(MI->second));
>> > >    }
>> > >  }
>> > >
>> > > @@ -1196,7 +1194,7 @@ void CGDebugInfo::CollectCXXMemberFuncti
>> > >  /// C++ base classes. This is used while creating debug info entry
>> > > for
>> > >  /// a Record.
>> > >  void CGDebugInfo::CollectCXXBases(const CXXRecordDecl *RD,
>> > > llvm::DIFile Unit,
>> > > -                                  SmallVectorImpl<llvm::Value *>
>> > > &EltTys,
>> > > +                                  SmallVectorImpl<llvm::Metadata *>
>> > > &EltTys,
>> > >                                    llvm::DIType RecordTy) {
>> > >
>> > >    const ASTRecordLayout &RL =
>> > > CGM.getContext().getASTRecordLayout(RD);
>> > > @@ -1238,7 +1236,7 @@ llvm::DIArray
>> > >  CGDebugInfo::CollectTemplateParams(const TemplateParameterList
>> > > *TPList,
>> > >                                     ArrayRef<TemplateArgument> TAList,
>> > >                                     llvm::DIFile Unit) {
>> > > -  SmallVector<llvm::Value *, 16> TemplateParams;
>> > > +  SmallVector<llvm::Metadata *, 16> TemplateParams;
>> > >    for (unsigned i = 0, e = TAList.size(); i != e; ++i) {
>> > >      const TemplateArgument &TA = TAList[i];
>> > >      StringRef Name;
>> > > @@ -1263,7 +1261,7 @@ CGDebugInfo::CollectTemplateParams(const
>> > >        const ValueDecl *D = TA.getAsDecl();
>> > >        QualType T =
>> > > TA.getParamTypeForDecl().getDesugaredType(CGM.getContext());
>> > >        llvm::DIType TTy = getOrCreateType(T, Unit);
>> > > -      llvm::Value *V = nullptr;
>> > > +      llvm::Constant *V = nullptr;
>> > >        const CXXMethodDecl *MD;
>> > >        // Variable pointer template parameters have a value that is
>> > > the address
>> > >        // of the variable.
>> > > @@ -1295,7 +1293,7 @@ CGDebugInfo::CollectTemplateParams(const
>> > >      case TemplateArgument::NullPtr: {
>> > >        QualType T = TA.getNullPtrType();
>> > >        llvm::DIType TTy = getOrCreateType(T, Unit);
>> > > -      llvm::Value *V = nullptr;
>> > > +      llvm::Constant *V = nullptr;
>> > >        // Special case member data pointer null values since they're
>> > > actually -1
>> > >        // instead of zero.
>> > >        if (const MemberPointerType *MPT =
>> > > @@ -1332,7 +1330,7 @@ CGDebugInfo::CollectTemplateParams(const
>> > >        QualType T = E->getType();
>> > >        if (E->isGLValue())
>> > >          T = CGM.getContext().getLValueReferenceType(T);
>> > > -      llvm::Value *V = CGM.EmitConstantExpr(E, T);
>> > > +      llvm::Constant *V = CGM.EmitConstantExpr(E, T);
>> > >        assert(V && "Expression in template argument isn't constant");
>> > >        llvm::DIType TTy = getOrCreateType(T, Unit);
>> > >        llvm::DITemplateValueParameter TVP =
>> > > @@ -1385,7 +1383,7 @@ llvm::DIType CGDebugInfo::getOrCreateVTa
>> > >    ASTContext &Context = CGM.getContext();
>> > >
>> > >    /* Function type */
>> > > -  llvm::Value *STy = getOrCreateType(Context.IntTy, Unit);
>> > > +  llvm::Metadata *STy = getOrCreateType(Context.IntTy, Unit);
>> > >    llvm::DITypeArray SElements = DBuilder.getOrCreateTypeArray(STy);
>> > >    llvm::DIType SubTy = DBuilder.createSubroutineType(Unit,
>> > > SElements);
>> > >    unsigned Size = Context.getTypeSize(Context.VoidPtrTy);
>> > > @@ -1404,7 +1402,7 @@ StringRef CGDebugInfo::getVTableName(con
>> > >  /// CollectVTableInfo - If the C++ class has vtable info then insert
>> > > appropriate
>> > >  /// debug info entry in EltTys vector.
>> > >  void CGDebugInfo::CollectVTableInfo(const CXXRecordDecl *RD,
>> > > llvm::DIFile Unit,
>> > > -                                    SmallVectorImpl<llvm::Value *>
>> > > &EltTys) {
>> > > +                                    SmallVectorImpl<llvm::Metadata *>
>> > > &EltTys) {
>> > >    const ASTRecordLayout &RL =
>> > > CGM.getContext().getASTRecordLayout(RD);
>> > >
>> > >    // If there is a primary base then it will hold vtable info.
>> > > @@ -1447,12 +1445,11 @@ void CGDebugInfo::completeType(const Enu
>> > >    void *TyPtr = Ty.getAsOpaquePtr();
>> > >    auto I = TypeCache.find(TyPtr);
>> > >    if (I == TypeCache.end() ||
>> > > -      !llvm::DIType(cast<llvm::MDNode>(static_cast<llvm::Value
>> > > *>(I->second)))
>> > > -           .isForwardDecl())
>> > > +      !llvm::DIType(cast<llvm::MDNode>(I->second)).isForwardDecl())
>> > >      return;
>> > >    llvm::DIType Res = CreateTypeDefinition(Ty->castAs<EnumType>());
>> > >    assert(!Res.isForwardDecl());
>> > > -  TypeCache[TyPtr] = Res;
>> > > +  TypeCache[TyPtr].reset(Res);
>> > >  }
>> > >
>> > >  void CGDebugInfo::completeType(const RecordDecl *RD) {
>> > > @@ -1482,12 +1479,11 @@ void CGDebugInfo::completeClassData(cons
>> > >    void *TyPtr = Ty.getAsOpaquePtr();
>> > >    auto I = TypeCache.find(TyPtr);
>> > >    if (I != TypeCache.end() &&
>> > > -      !llvm::DIType(cast<llvm::MDNode>(static_cast<llvm::Value
>> > > *>(I->second)))
>> > > -           .isForwardDecl())
>> > > +      !llvm::DIType(cast<llvm::MDNode>(I->second)).isForwardDecl())
>> > >      return;
>> > >    llvm::DIType Res = CreateTypeDefinition(Ty->castAs<RecordType>());
>> > >    assert(!Res.isForwardDecl());
>> > > -  TypeCache[TyPtr] = Res;
>> > > +  TypeCache[TyPtr].reset(Res);
>> > >  }
>> > >
>> > >  static bool
>> > > hasExplicitMemberDefinition(CXXRecordDecl::method_iterator I,
>> > > @@ -1571,11 +1567,11 @@ llvm::DIType CGDebugInfo::CreateTypeDefi
>> > >      CollectContainingType(CXXDecl, FwdDecl);
>> > >
>> > >    // Push the struct on region stack.
>> > > -  LexicalBlockStack.push_back(&*FwdDecl);
>> > > -  RegionMap[Ty->getDecl()] = llvm::WeakVH(FwdDecl);
>> > > +  LexicalBlockStack.emplace_back(&*FwdDecl);
>> > > +  RegionMap[Ty->getDecl()].reset(FwdDecl);
>> > >
>> > >    // Convert all the elements.
>> > > -  SmallVector<llvm::Value *, 16> EltTys;
>> > > +  SmallVector<llvm::Metadata *, 16> EltTys;
>> > >    // what about nested types?
>> > >
>> > >    // Note: The split of CXXDecl information here is intentional, the
>> > > @@ -1599,7 +1595,7 @@ llvm::DIType CGDebugInfo::CreateTypeDefi
>> > >    llvm::DIArray Elements = DBuilder.getOrCreateArray(EltTys);
>> > >    FwdDecl.setArrays(Elements);
>> > >
>> > > -  RegionMap[Ty->getDecl()] = llvm::WeakVH(FwdDecl);
>> > > +  RegionMap[Ty->getDecl()].reset(FwdDecl);
>> > >    return FwdDecl;
>> > >  }
>> > >
>> > > @@ -1680,14 +1676,14 @@ llvm::DIType CGDebugInfo::CreateTypeDefi
>> > >        llvm::DIArray(), RuntimeLang);
>> > >
>> > >    QualType QTy(Ty, 0);
>> > > -  TypeCache[QTy.getAsOpaquePtr()] = RealDecl;
>> > > +  TypeCache[QTy.getAsOpaquePtr()].reset(RealDecl);
>> > >
>> > >    // Push the struct on region stack.
>> > > -  LexicalBlockStack.push_back(static_cast<llvm::MDNode *>(RealDecl));
>> > > -  RegionMap[Ty->getDecl()] = llvm::WeakVH(RealDecl);
>> > > +  LexicalBlockStack.emplace_back(static_cast<llvm::MDNode
>> > > *>(RealDecl));
>> > > +  RegionMap[Ty->getDecl()].reset(RealDecl);
>> > >
>> > >    // Convert all the elements.
>> > > -  SmallVector<llvm::Value *, 16> EltTys;
>> > > +  SmallVector<llvm::Metadata *, 16> EltTys;
>> > >
>> > >    ObjCInterfaceDecl *SClass = ID->getSuperClass();
>> > >    if (SClass) {
>> > > @@ -1813,7 +1809,7 @@ llvm::DIType CGDebugInfo::CreateType(con
>> > >      // Use Count == -1 to express such arrays.
>> > >      Count = -1;
>> > >
>> > > -  llvm::Value *Subscript = DBuilder.getOrCreateSubrange(0, Count);
>> > > +  llvm::Metadata *Subscript = DBuilder.getOrCreateSubrange(0, Count);
>> > >    llvm::DIArray SubscriptArray =
>> > > DBuilder.getOrCreateArray(Subscript);
>> > >
>> > >    uint64_t Size = CGM.getContext().getTypeSize(Ty);
>> > > @@ -1849,7 +1845,7 @@ llvm::DIType CGDebugInfo::CreateType(con
>> > >    // Add the dimensions of the array.  FIXME: This loses CV
>> > > qualifiers from
>> > >    // interior arrays, do we care?  Why aren't nested arrays
>> > > represented the
>> > >    // obvious/recursive way?
>> > > -  SmallVector<llvm::Value *, 8> Subscripts;
>> > > +  SmallVector<llvm::Metadata *, 8> Subscripts;
>> > >    QualType EltTy(Ty, 0);
>> > >    while ((Ty = dyn_cast<ArrayType>(EltTy))) {
>> > >      // If the number of elements is known, then count is that number.
>> > > Otherwise,
>> > > @@ -1932,7 +1928,9 @@ llvm::DIType CGDebugInfo::CreateEnumType
>> > >      llvm::DIType RetTy = DBuilder.createReplaceableForwardDecl(
>> > >          llvm::dwarf::DW_TAG_enumeration_type, EDName, EDContext,
>> > > DefUnit, Line,
>> > >          0, Size, Align, FullName);
>> > > -    ReplaceMap.push_back(std::make_pair(Ty, static_cast<llvm::Value
>> > > *>(RetTy)));
>> > > +    ReplaceMap.emplace_back(
>> > > +        std::piecewise_construct, std::make_tuple(Ty),
>> > > +        std::make_tuple(static_cast<llvm::Metadata *>(RetTy)));
>> > >      return RetTy;
>> > >    }
>> > >
>> > > @@ -1951,7 +1949,7 @@ llvm::DIType CGDebugInfo::CreateTypeDefi
>> > >    SmallString<256> FullName = getUniqueTagTypeName(Ty, CGM, TheCU);
>> > >
>> > >    // Create DIEnumerator elements for each enumerator.
>> > > -  SmallVector<llvm::Value *, 16> Enumerators;
>> > > +  SmallVector<llvm::Metadata *, 16> Enumerators;
>> > >    ED = ED->getDefinition();
>> > >    for (const auto *Enum : ED->enumerators()) {
>> > >      Enumerators.push_back(DBuilder.createEnumerator(
>> > > @@ -2039,7 +2037,7 @@ llvm::DIType CGDebugInfo::getTypeOrNull(
>> > >    auto it = TypeCache.find(Ty.getAsOpaquePtr());
>> > >    if (it != TypeCache.end()) {
>> > >      // Verify that the debug info still exists.
>> > > -    if (llvm::Value *V = it->second)
>> > > +    if (llvm::Metadata *V = it->second)
>> > >        return llvm::DIType(cast<llvm::MDNode>(V));
>> > >    }
>> > >
>> > > @@ -2074,7 +2072,7 @@ llvm::DIType CGDebugInfo::getOrCreateTyp
>> > >    void *TyPtr = Ty.getAsOpaquePtr();
>> > >
>> > >    // And update the type cache.
>> > > -  TypeCache[TyPtr] = Res;
>> > > +  TypeCache[TyPtr].reset(Res);
>> > >
>> > >    return Res;
>> > >  }
>> > > @@ -2209,7 +2207,7 @@ llvm::DIType CGDebugInfo::getOrCreateLim
>> > >    Res.setArrays(T.getElements());
>> > >
>> > >    // And update the type cache.
>> > > -  TypeCache[QTy.getAsOpaquePtr()] = Res;
>> > > +  TypeCache[QTy.getAsOpaquePtr()].reset(Res);
>> > >    return Res;
>> > >  }
>> > >
>> > > @@ -2257,8 +2255,8 @@ llvm::DICompositeType CGDebugInfo::Creat
>> > >          RDContext, RDName, DefUnit, Line, Size, Align, 0,
>> > > llvm::DIType(),
>> > >          llvm::DIArray(), 0, llvm::DIType(), FullName);
>> > >
>> > > -  RegionMap[Ty->getDecl()] = llvm::WeakVH(RealDecl);
>> > > -  TypeCache[QualType(Ty, 0).getAsOpaquePtr()] = RealDecl;
>> > > +  RegionMap[Ty->getDecl()].reset(RealDecl);
>> > > +  TypeCache[QualType(Ty, 0).getAsOpaquePtr()].reset(RealDecl);
>> > >
>> > >    if (const ClassTemplateSpecializationDecl *TSpecial =
>> > >            dyn_cast<ClassTemplateSpecializationDecl>(RD))
>> > > @@ -2401,8 +2399,9 @@ CGDebugInfo::getFunctionForwardDeclarati
>> > >                                         CGM.getLangOpts().Optimize,
>> > > nullptr,
>> > >                                         TParamsArray,
>> > > getFunctionDeclaration(FD));
>> > >    const FunctionDecl *CanonDecl =
>> > > cast<FunctionDecl>(FD->getCanonicalDecl());
>> > > -  FwdDeclReplaceMap.push_back(std::make_pair(CanonDecl,
>> > > -                                             static_cast<llvm::Value
>> > > *>(SP)));
>> > > +  FwdDeclReplaceMap.emplace_back(
>> > > +      std::piecewise_construct, std::make_tuple(CanonDecl),
>> > > +      std::make_tuple(static_cast<llvm::Metadata *>(SP)));
>> > >    return SP;
>> > >  }
>> > >
>> > > @@ -2421,8 +2420,10 @@ CGDebugInfo::getGlobalVariableForwardDec
>> > >                                               Line, getOrCreateType(T,
>> > > Unit),
>> > >
>> > > !VD->isExternallyVisible(),
>> > >                                               nullptr, nullptr);
>> > > -
>> > > FwdDeclReplaceMap.push_back(std::make_pair(cast<VarDecl>(VD->getCanonicalDecl()),
>> > > -                                             static_cast<llvm::Value
>> > > *>(GV)));
>> > > +  FwdDeclReplaceMap.emplace_back(
>> > > +      std::piecewise_construct,
>> > > +      std::make_tuple(cast<VarDecl>(VD->getCanonicalDecl())),
>> > > +      std::make_tuple(static_cast<llvm::Metadata *>(GV)));
>> > >    return GV;
>> > >  }
>> > >
>> > > @@ -2434,13 +2435,10 @@ llvm::DIDescriptor CGDebugInfo::getDecla
>> > >    if (const TypeDecl *TD = dyn_cast<TypeDecl>(D))
>> > >      return getOrCreateType(CGM.getContext().getTypeDeclType(TD),
>> > >                             getOrCreateFile(TD->getLocation()));
>> > > -  llvm::DenseMap<const Decl *, llvm::WeakVH>::iterator I =
>> > > -      DeclCache.find(D->getCanonicalDecl());
>> > > +  auto I = DeclCache.find(D->getCanonicalDecl());
>> > >
>> > > -  if (I != DeclCache.end()) {
>> > > -    llvm::Value *V = I->second;
>> > > -    return llvm::DIDescriptor(dyn_cast_or_null<llvm::MDNode>(V));
>> > > -  }
>> > > +  if (I != DeclCache.end())
>> > > +    return
>> > > llvm::DIDescriptor(dyn_cast_or_null<llvm::MDNode>(I->second));
>> > >
>> > >    // No definition for now. Emit a forward definition that might be
>> > >    // merged with a potential upcoming definition.
>> > > @@ -2465,8 +2463,7 @@ llvm::DISubprogram CGDebugInfo::getFunct
>> > >    // Setup context.
>> > >    llvm::DIScope S =
>> > > getContextDescriptor(cast<Decl>(D->getDeclContext()));
>> > >
>> > > -  llvm::DenseMap<const FunctionDecl *, llvm::WeakVH>::iterator MI =
>> > > -      SPCache.find(FD->getCanonicalDecl());
>> > > +  auto MI = SPCache.find(FD->getCanonicalDecl());
>> > >    if (MI == SPCache.end()) {
>> > >      if (const CXXMethodDecl *MD =
>> > >              dyn_cast<CXXMethodDecl>(FD->getCanonicalDecl())) {
>> > > @@ -2477,18 +2474,15 @@ llvm::DISubprogram CGDebugInfo::getFunct
>> > >      }
>> > >    }
>> > >    if (MI != SPCache.end()) {
>> > > -    llvm::Value *V = MI->second;
>> > > -    llvm::DISubprogram SP(dyn_cast_or_null<llvm::MDNode>(V));
>> > > +    llvm::DISubprogram
>> > > SP(dyn_cast_or_null<llvm::MDNode>(MI->second));
>> > >      if (SP.isSubprogram() && !SP.isDefinition())
>> > >        return SP;
>> > >    }
>> > >
>> > >    for (auto NextFD : FD->redecls()) {
>> > > -    llvm::DenseMap<const FunctionDecl *, llvm::WeakVH>::iterator MI =
>> > > -        SPCache.find(NextFD->getCanonicalDecl());
>> > > +    auto MI = SPCache.find(NextFD->getCanonicalDecl());
>> > >      if (MI != SPCache.end()) {
>> > > -      llvm::Value *V = MI->second;
>> > > -      llvm::DISubprogram SP(dyn_cast_or_null<llvm::MDNode>(V));
>> > > +      llvm::DISubprogram
>> > > SP(dyn_cast_or_null<llvm::MDNode>(MI->second));
>> > >        if (SP.isSubprogram() && !SP.isDefinition())
>> > >          return SP;
>> > >      }
>> > > @@ -2513,7 +2507,7 @@ llvm::DICompositeType CGDebugInfo::getOr
>> > >      return getOrCreateMethodType(Method, F);
>> > >    if (const ObjCMethodDecl *OMethod = dyn_cast<ObjCMethodDecl>(D)) {
>> > >      // Add "self" and "_cmd"
>> > > -    SmallVector<llvm::Value *, 16> Elts;
>> > > +    SmallVector<llvm::Metadata *, 16> Elts;
>> > >
>> > >      // First element is always return type. For 'void' functions it
>> > > is NULL.
>> > >      QualType ResultTy = OMethod->getReturnType();
>> > > @@ -2546,7 +2540,7 @@ llvm::DICompositeType CGDebugInfo::getOr
>> > >    // unspecified parameter.
>> > >    if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
>> > >      if (FD->isVariadic()) {
>> > > -      SmallVector<llvm::Value *, 16> EltTys;
>> > > +      SmallVector<llvm::Metadata *, 16> EltTys;
>> > >        EltTys.push_back(getOrCreateType(FD->getReturnType(), F));
>> > >        if (const FunctionProtoType *FPT =
>> > > dyn_cast<FunctionProtoType>(FnType))
>> > >          for (unsigned i = 0, e = FPT->getNumParams(); i != e; ++i)
>> > > @@ -2581,15 +2575,13 @@ void CGDebugInfo::EmitFunctionStart(Glob
>> > >      LinkageName = Fn->getName();
>> > >    } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
>> > >      // If there is a DISubprogram for this function available then
>> > > use it.
>> > > -    llvm::DenseMap<const FunctionDecl *, llvm::WeakVH>::iterator FI =
>> > > -        SPCache.find(FD->getCanonicalDecl());
>> > > +    auto FI = SPCache.find(FD->getCanonicalDecl());
>> > >      if (FI != SPCache.end()) {
>> > > -      llvm::Value *V = FI->second;
>> > > -      llvm::DIDescriptor SP(dyn_cast_or_null<llvm::MDNode>(V));
>> > > +      llvm::DIDescriptor
>> > > SP(dyn_cast_or_null<llvm::MDNode>(FI->second));
>> > >        if (SP.isSubprogram() && llvm::DISubprogram(SP).isDefinition())
>> > > {
>> > >          llvm::MDNode *SPN = SP;
>> > > -        LexicalBlockStack.push_back(SPN);
>> > > -        RegionMap[D] = llvm::WeakVH(SP);
>> > > +        LexicalBlockStack.emplace_back(SPN);
>> > > +        RegionMap[D].reset(SP);
>> > >          return;
>> > >        }
>> > >      }
>> > > @@ -2629,14 +2621,14 @@ void CGDebugInfo::EmitFunctionStart(Glob
>> > >    // code for the initialization of globals. Do not record these
>> > > decls
>> > >    // as they will overwrite the actual VarDecl Decl in the cache.
>> > >    if (HasDecl && isa<FunctionDecl>(D))
>> > > -    DeclCache.insert(std::make_pair(D->getCanonicalDecl(),
>> > > llvm::WeakVH(SP)));
>> > > +    DeclCache[D->getCanonicalDecl()].reset(static_cast<llvm::Metadata
>> > > *>(SP));
>> > >
>> > >    // Push the function onto the lexical block stack.
>> > >    llvm::MDNode *SPN = SP;
>> > > -  LexicalBlockStack.push_back(SPN);
>> > > +  LexicalBlockStack.emplace_back(SPN);
>> > >
>> > >    if (HasDecl)
>> > > -    RegionMap[D] = llvm::WeakVH(SP);
>> > > +    RegionMap[D].reset(SP);
>> > >  }
>> > >
>> > >  /// EmitLocation - Emit metadata to indicate a change in line/column
>> > > @@ -2676,7 +2668,7 @@ void CGDebugInfo::CreateLexicalBlock(Sou
>> > >                                                     :
>> > > LexicalBlockStack.back()),
>> > >        getOrCreateFile(CurLoc), getLineNumber(CurLoc),
>> > > getColumnNumber(CurLoc));
>> > >    llvm::MDNode *DN = D;
>> > > -  LexicalBlockStack.push_back(DN);
>> > > +  LexicalBlockStack.emplace_back(DN);
>> > >  }
>> > >
>> > >  /// EmitLexicalBlockStart - Constructs the debug code for entering a
>> > > declarative
>> > > @@ -2732,7 +2724,7 @@ void CGDebugInfo::EmitFunctionEnd(CGBuil
>> > >  llvm::DIType CGDebugInfo::EmitTypeForVarWithBlocksAttr(const VarDecl
>> > > *VD,
>> > >                                                         uint64_t
>> > > *XOffset) {
>> > >
>> > > -  SmallVector<llvm::Value *, 5> EltTys;
>> > > +  SmallVector<llvm::Metadata *, 5> EltTys;
>> > >    QualType FType;
>> > >    uint64_t FieldSize, FieldOffset;
>> > >    unsigned FieldAlign;
>> > > @@ -3047,7 +3039,7 @@ void CGDebugInfo::EmitDeclareOfBlockLite
>> > >    const llvm::StructLayout *blockLayout =
>> > >        CGM.getDataLayout().getStructLayout(block.StructureType);
>> > >
>> > > -  SmallVector<llvm::Value *, 16> fields;
>> > > +  SmallVector<llvm::Metadata *, 16> fields;
>> > >    fields.push_back(createFieldType("__isa", C.VoidPtrTy, 0, loc,
>> > > AS_public,
>> > >
>> > > blockLayout->getElementOffsetInBits(0),
>> > >                                     tunit, tunit));
>> > > @@ -3181,8 +3173,7 @@ llvm::DIDerivedType
>> > >  CGDebugInfo::getOrCreateStaticDataMemberDeclarationOrNull(const
>> > > VarDecl *D) {
>> > >    if (!D->isStaticDataMember())
>> > >      return llvm::DIDerivedType();
>> > > -  llvm::DenseMap<const Decl *, llvm::WeakVH>::iterator MI =
>> > > -      StaticDataMemberCache.find(D->getCanonicalDecl());
>> > > +  auto MI = StaticDataMemberCache.find(D->getCanonicalDecl());
>> > >    if (MI != StaticDataMemberCache.end()) {
>> > >      assert(MI->second && "Static data member declaration should still
>> > > exist");
>> > >      return llvm::DIDerivedType(cast<llvm::MDNode>(MI->second));
>> > > @@ -3255,7 +3246,7 @@ void CGDebugInfo::EmitGlobalVariable(llv
>> > >          Var->hasInternalLinkage(), Var,
>> > >          getOrCreateStaticDataMemberDeclarationOrNull(D));
>> > >    }
>> > > -  DeclCache.insert(std::make_pair(D->getCanonicalDecl(),
>> > > llvm::WeakVH(GV)));
>> > > +  DeclCache[D->getCanonicalDecl()].reset(static_cast<llvm::Metadata
>> > > *>(GV));
>> > >  }
>> > >
>> > >  /// EmitGlobalVariable - Emit global variable's debug info.
>> > > @@ -3291,13 +3282,12 @@ void CGDebugInfo::EmitGlobalVariable(con
>> > >    llvm::DIDescriptor DContext =
>> > >        getContextDescriptor(dyn_cast<Decl>(VD->getDeclContext()));
>> > >
>> > > -  auto pair = DeclCache.insert(std::make_pair(VD, llvm::WeakVH()));
>> > > -  if (!pair.second)
>> > > +  auto &GV = DeclCache[VD];
>> > > +  if (GV)
>> > >      return;
>> > > -  llvm::DIGlobalVariable GV = DBuilder.createGlobalVariable(
>> > > +  GV.reset(DBuilder.createGlobalVariable(
>> > >        DContext, Name, StringRef(), Unit,
>> > > getLineNumber(VD->getLocation()), Ty,
>> > > -      true, Init,
>> > > getOrCreateStaticDataMemberDeclarationOrNull(VarD));
>> > > -  pair.first->second = llvm::WeakVH(GV);
>> > > +      true, Init,
>> > > getOrCreateStaticDataMemberDeclarationOrNull(VarD)));
>> > >  }
>> > >
>> > >  llvm::DIScope CGDebugInfo::getCurrentContextDescriptor(const Decl *D)
>> > > {
>> > > @@ -3334,7 +3324,7 @@ llvm::DIImportedEntity
>> > >  CGDebugInfo::EmitNamespaceAlias(const NamespaceAliasDecl &NA) {
>> > >    if (CGM.getCodeGenOpts().getDebugInfo() <
>> > > CodeGenOptions::LimitedDebugInfo)
>> > >      return llvm::DIImportedEntity(nullptr);
>> > > -  llvm::WeakVH &VH = NamespaceAliasCache[&NA];
>> > > +  auto &VH = NamespaceAliasCache[&NA];
>> > >    if (VH)
>> > >      return llvm::DIImportedEntity(cast<llvm::MDNode>(VH));
>> > >    llvm::DIImportedEntity R(nullptr);
>> > > @@ -3350,7 +3340,7 @@ CGDebugInfo::EmitNamespaceAlias(const Na
>> > >          getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())),
>> > >
>> > > getOrCreateNameSpace(cast<NamespaceDecl>(NA.getAliasedNamespace())),
>> > >          getLineNumber(NA.getLocation()), NA.getName());
>> > > -  VH = R;
>> > > +  VH.reset(R);
>> > >    return R;
>> > >  }
>> > >
>> > > @@ -3359,8 +3349,7 @@ CGDebugInfo::EmitNamespaceAlias(const Na
>> > >  llvm::DINameSpace
>> > >  CGDebugInfo::getOrCreateNameSpace(const NamespaceDecl *NSDecl) {
>> > >    NSDecl = NSDecl->getCanonicalDecl();
>> > > -  llvm::DenseMap<const NamespaceDecl *, llvm::WeakVH>::iterator I =
>> > > -    NameSpaceCache.find(NSDecl);
>> > > +  auto I = NameSpaceCache.find(NSDecl);
>> > >    if (I != NameSpaceCache.end())
>> > >      return llvm::DINameSpace(cast<llvm::MDNode>(I->second));
>> > >
>> > > @@ -3370,7 +3359,7 @@ CGDebugInfo::getOrCreateNameSpace(const
>> > >      getContextDescriptor(dyn_cast<Decl>(NSDecl->getDeclContext()));
>> > >    llvm::DINameSpace NS =
>> > >      DBuilder.createNameSpace(Context, NSDecl->getName(), FileD,
>> > > LineNo);
>> > > -  NameSpaceCache[NSDecl] = llvm::WeakVH(NS);
>> > > +  NameSpaceCache[NSDecl].reset(NS);
>> > >    return NS;
>> > >  }
>> > >
>> > > @@ -3401,19 +3390,19 @@ void CGDebugInfo::finalize() {
>> > >    for (const auto &p : FwdDeclReplaceMap) {
>> > >      assert(p.second);
>> > >      llvm::DIDescriptor FwdDecl(cast<llvm::MDNode>(p.second));
>> > > -    llvm::WeakVH VH;
>> > > +    llvm::Metadata *Repl;
>> > >
>> > >      auto it = DeclCache.find(p.first);
>> > >      // If there has been no definition for the declaration, call RAUV
>> > >      // with ourselves, that will destroy the temporary MDNode and
>> > >      // replace it with a standard one, avoiding leaking memory.
>> > >      if (it == DeclCache.end())
>> > > -      VH = p.second;
>> > > +      Repl = p.second;
>> > >      else
>> > > -      VH = it->second;
>> > > +      Repl = it->second;
>> > >
>> > >      FwdDecl.replaceAllUsesWith(CGM.getLLVMContext(),
>> > > -
>> > > llvm::DIDescriptor(cast<llvm::MDNode>(VH)));
>> > > +
>> > > llvm::DIDescriptor(cast<llvm::MDNode>(Repl)));
>> > >    }
>> > >
>> > >    // We keep our own list of retained types, because we need to look
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.h
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.h?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CGDebugInfo.h (original)
>> > > +++ cfe/trunk/lib/CodeGen/CGDebugInfo.h Tue Dec  9 12:39:32 2014
>> > > @@ -65,7 +65,7 @@ class CGDebugInfo {
>> > >    llvm::DIType BlockLiteralGeneric;
>> > >
>> > >    /// TypeCache - Cache of previously constructed Types.
>> > > -  llvm::DenseMap<const void *, llvm::WeakVH> TypeCache;
>> > > +  llvm::DenseMap<const void *, llvm::TrackingMDRef> TypeCache;
>> > >
>> > >    struct ObjCInterfaceCacheEntry {
>> > >      const ObjCInterfaceType *Type;
>> > > @@ -85,15 +85,16 @@ class CGDebugInfo {
>> > >
>> > >    /// ReplaceMap - Cache of forward declared types to RAUW at the end
>> > > of
>> > >    /// compilation.
>> > > -  std::vector<std::pair<const TagType *, llvm::WeakVH>> ReplaceMap;
>> > > +  std::vector<std::pair<const TagType *, llvm::TrackingMDRef>>
>> > > ReplaceMap;
>> > >
>> > >    /// \brief Cache of replaceable forward declarartions (functions
>> > > and
>> > >    /// variables) to RAUW at the end of compilation.
>> > > -  std::vector<std::pair<const DeclaratorDecl *, llvm::WeakVH>>
>> > > FwdDeclReplaceMap;
>> > > +  std::vector<std::pair<const DeclaratorDecl *, llvm::TrackingMDRef>>
>> > > +      FwdDeclReplaceMap;
>> > >
>> > >    // LexicalBlockStack - Keep track of our current nested lexical
>> > > block.
>> > > -  std::vector<llvm::TrackingVH<llvm::MDNode> > LexicalBlockStack;
>> > > -  llvm::DenseMap<const Decl *, llvm::WeakVH> RegionMap;
>> > > +  std::vector<llvm::TrackingMDNodeRef> LexicalBlockStack;
>> > > +  llvm::DenseMap<const Decl *, llvm::TrackingMDRef> RegionMap;
>> > >    // FnBeginRegionCount - Keep track of LexicalBlockStack counter at
>> > > the
>> > >    // beginning of a function. This is used to pop unbalanced regions
>> > > at
>> > >    // the end of a function.
>> > > @@ -104,14 +105,15 @@ class CGDebugInfo {
>> > >    llvm::BumpPtrAllocator DebugInfoNames;
>> > >    StringRef CWDName;
>> > >
>> > > -  llvm::DenseMap<const char *, llvm::WeakVH> DIFileCache;
>> > > -  llvm::DenseMap<const FunctionDecl *, llvm::WeakVH> SPCache;
>> > > +  llvm::DenseMap<const char *, llvm::TrackingMDRef> DIFileCache;
>> > > +  llvm::DenseMap<const FunctionDecl *, llvm::TrackingMDRef> SPCache;
>> > >    /// \brief Cache declarations relevant to
>> > > DW_TAG_imported_declarations (C++
>> > >    /// using declarations) that aren't covered by other more specific
>> > > caches.
>> > > -  llvm::DenseMap<const Decl *, llvm::WeakVH> DeclCache;
>> > > -  llvm::DenseMap<const NamespaceDecl *, llvm::WeakVH> NameSpaceCache;
>> > > -  llvm::DenseMap<const NamespaceAliasDecl *, llvm::WeakVH>
>> > > NamespaceAliasCache;
>> > > -  llvm::DenseMap<const Decl *, llvm::WeakVH> StaticDataMemberCache;
>> > > +  llvm::DenseMap<const Decl *, llvm::TrackingMDRef> DeclCache;
>> > > +  llvm::DenseMap<const NamespaceDecl *, llvm::TrackingMDRef>
>> > > NameSpaceCache;
>> > > +  llvm::DenseMap<const NamespaceAliasDecl *, llvm::TrackingMDRef>
>> > > +      NamespaceAliasCache;
>> > > +  llvm::DenseMap<const Decl *, llvm::TrackingMDRef>
>> > > StaticDataMemberCache;
>> > >
>> > >    /// Helper functions for getOrCreateType.
>> > >    unsigned Checksum(const ObjCInterfaceDecl *InterfaceDecl);
>> > > @@ -162,14 +164,12 @@ class CGDebugInfo {
>> > >                                               llvm::DIFile F,
>> > >                                               llvm::DIType RecordTy);
>> > >
>> > > -  void CollectCXXMemberFunctions(const CXXRecordDecl *Decl,
>> > > -                                 llvm::DIFile F,
>> > > -                                 SmallVectorImpl<llvm::Value *> &E,
>> > > +  void CollectCXXMemberFunctions(const CXXRecordDecl *Decl,
>> > > llvm::DIFile F,
>> > > +                                 SmallVectorImpl<llvm::Metadata *>
>> > > &E,
>> > >                                   llvm::DIType T);
>> > >
>> > > -  void CollectCXXBases(const CXXRecordDecl *Decl,
>> > > -                       llvm::DIFile F,
>> > > -                       SmallVectorImpl<llvm::Value *> &EltTys,
>> > > +  void CollectCXXBases(const CXXRecordDecl *Decl, llvm::DIFile F,
>> > > +                       SmallVectorImpl<llvm::Metadata *> &EltTys,
>> > >                         llvm::DIType RecordTy);
>> > >
>> > >    llvm::DIArray
>> > > @@ -192,23 +192,21 @@ class CGDebugInfo {
>> > >
>> > >    // Helpers for collecting fields of a record.
>> > >    void CollectRecordLambdaFields(const CXXRecordDecl *CXXDecl,
>> > > -                                 SmallVectorImpl<llvm::Value *> &E,
>> > > +                                 SmallVectorImpl<llvm::Metadata *>
>> > > &E,
>> > >                                   llvm::DIType RecordTy);
>> > >    llvm::DIDerivedType CreateRecordStaticField(const VarDecl *Var,
>> > >                                                llvm::DIType RecordTy,
>> > >                                                const RecordDecl* RD);
>> > >    void CollectRecordNormalField(const FieldDecl *Field, uint64_t
>> > > OffsetInBits,
>> > >                                  llvm::DIFile F,
>> > > -                                SmallVectorImpl<llvm::Value *> &E,
>> > > -                                llvm::DIType RecordTy,
>> > > -                                const RecordDecl* RD);
>> > > +                                SmallVectorImpl<llvm::Metadata *> &E,
>> > > +                                llvm::DIType RecordTy, const
>> > > RecordDecl *RD);
>> > >    void CollectRecordFields(const RecordDecl *Decl, llvm::DIFile F,
>> > > -                           SmallVectorImpl<llvm::Value *> &E,
>> > > +                           SmallVectorImpl<llvm::Metadata *> &E,
>> > >                             llvm::DICompositeType RecordTy);
>> > >
>> > > -  void CollectVTableInfo(const CXXRecordDecl *Decl,
>> > > -                         llvm::DIFile F,
>> > > -                         SmallVectorImpl<llvm::Value *> &EltTys);
>> > > +  void CollectVTableInfo(const CXXRecordDecl *Decl, llvm::DIFile F,
>> > > +                         SmallVectorImpl<llvm::Metadata *> &EltTys);
>> > >
>> > >    // CreateLexicalBlock - Create a new lexical block node and push it
>> > > on
>> > >    // the stack.
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CGExpr.cpp
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExpr.cpp?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CGExpr.cpp (original)
>> > > +++ cfe/trunk/lib/CodeGen/CGExpr.cpp Tue Dec  9 12:39:32 2014
>> > > @@ -1415,8 +1415,8 @@ llvm::Value *CodeGenFunction::EmitExtVec
>> > >  RValue CodeGenFunction::EmitLoadOfGlobalRegLValue(LValue LV) {
>> > >    assert((LV.getType()->isIntegerType() ||
>> > > LV.getType()->isPointerType()) &&
>> > >           "Bad type for register variable");
>> > > -  llvm::MDNode *RegName = dyn_cast<llvm::MDNode>(LV.getGlobalReg());
>> > > -  assert(RegName && "Register LValue is not metadata");
>> > > +  llvm::MDNode *RegName = cast<llvm::MDNode>(
>> > > +      cast<llvm::MetadataAsValue>(LV.getGlobalReg())->getMetadata());
>> > >
>> > >    // We accept integer and pointer types only
>> > >    llvm::Type *OrigTy = CGM.getTypes().ConvertType(LV.getType());
>> > > @@ -1426,7 +1426,8 @@ RValue CodeGenFunction::EmitLoadOfGlobal
>> > >    llvm::Type *Types[] = { Ty };
>> > >
>> > >    llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::read_register,
>> > > Types);
>> > > -  llvm::Value *Call = Builder.CreateCall(F, RegName);
>> > > +  llvm::Value *Call = Builder.CreateCall(
>> > > +      F, llvm::MetadataAsValue::get(Ty->getContext(), RegName));
>> > >    if (OrigTy->isPointerTy())
>> > >      Call = Builder.CreateIntToPtr(Call, OrigTy);
>> > >    return RValue::get(Call);
>> > > @@ -1680,7 +1681,8 @@ void CodeGenFunction::EmitStoreThroughEx
>> > >  void CodeGenFunction::EmitStoreThroughGlobalRegLValue(RValue Src,
>> > > LValue Dst) {
>> > >    assert((Dst.getType()->isIntegerType() ||
>> > > Dst.getType()->isPointerType()) &&
>> > >           "Bad type for register variable");
>> > > -  llvm::MDNode *RegName = dyn_cast<llvm::MDNode>(Dst.getGlobalReg());
>> > > +  llvm::MDNode *RegName = cast<llvm::MDNode>(
>> > > +
>> > > cast<llvm::MetadataAsValue>(Dst.getGlobalReg())->getMetadata());
>> > >    assert(RegName && "Register LValue is not metadata");
>> > >
>> > >    // We accept integer and pointer types only
>> > > @@ -1694,7 +1696,8 @@ void CodeGenFunction::EmitStoreThroughGl
>> > >    llvm::Value *Value = Src.getScalarVal();
>> > >    if (OrigTy->isPointerTy())
>> > >      Value = Builder.CreatePtrToInt(Value, Ty);
>> > > -  Builder.CreateCall2(F, RegName, Value);
>> > > +  Builder.CreateCall2(F, llvm::MetadataAsValue::get(Ty->getContext(),
>> > > RegName),
>> > > +                      Value);
>> > >  }
>> > >
>> > >  // setObjCGCLValueClass - sets class of the lvalue for the purpose of
>> > > @@ -1889,10 +1892,12 @@ static LValue EmitGlobalNamedRegister(co
>> > >    if (M->getNumOperands() == 0) {
>> > >      llvm::MDString *Str = llvm::MDString::get(CGM.getLLVMContext(),
>> > >                                                Asm->getLabel());
>> > > -    llvm::Value *Ops[] = { Str };
>> > > +    llvm::Metadata *Ops[] = {Str};
>> > >      M->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops));
>> > >    }
>> > > -  return LValue::MakeGlobalReg(M->getOperand(0), VD->getType(),
>> > > Alignment);
>> > > +  return LValue::MakeGlobalReg(
>> > > +      llvm::MetadataAsValue::get(CGM.getLLVMContext(),
>> > > M->getOperand(0)),
>> > > +      VD->getType(), Alignment);
>> > >  }
>> > >
>> > >  LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) {
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CGLoopInfo.cpp
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGLoopInfo.cpp?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CGLoopInfo.cpp (original)
>> > > +++ cfe/trunk/lib/CodeGen/CGLoopInfo.cpp Tue Dec  9 12:39:32 2014
>> > > @@ -24,40 +24,39 @@ static MDNode *createMetadata(LLVMContex
>> > >        Attrs.VectorizerEnable == LoopAttributes::VecUnspecified)
>> > >      return nullptr;
>> > >
>> > > -  SmallVector<Value *, 4> Args;
>> > > +  SmallVector<Metadata *, 4> Args;
>> > >    // Reserve operand 0 for loop id self reference.
>> > >    MDNode *TempNode = MDNode::getTemporary(Ctx, None);
>> > >    Args.push_back(TempNode);
>> > >
>> > >    // Setting vectorizer.width
>> > >    if (Attrs.VectorizerWidth > 0) {
>> > > -    Value *Vals[] = { MDString::get(Ctx,
>> > > "llvm.loop.vectorize.width"),
>> > > -                      ConstantInt::get(Type::getInt32Ty(Ctx),
>> > > -                                       Attrs.VectorizerWidth) };
>> > > +    Metadata *Vals[] = {MDString::get(Ctx,
>> > > "llvm.loop.vectorize.width"),
>> > > +                        ConstantAsMetadata::get(ConstantInt::get(
>> > > +                            Type::getInt32Ty(Ctx),
>> > > Attrs.VectorizerWidth))};
>> > >      Args.push_back(MDNode::get(Ctx, Vals));
>> > >    }
>> > >
>> > >    // Setting vectorizer.unroll
>> > >    if (Attrs.VectorizerUnroll > 0) {
>> > > -    Value *Vals[] = { MDString::get(Ctx,
>> > > "llvm.loop.interleave.count"),
>> > > -                      ConstantInt::get(Type::getInt32Ty(Ctx),
>> > > -                                       Attrs.VectorizerUnroll) };
>> > > +    Metadata *Vals[] = {MDString::get(Ctx,
>> > > "llvm.loop.interleave.count"),
>> > > +                        ConstantAsMetadata::get(ConstantInt::get(
>> > > +                            Type::getInt32Ty(Ctx),
>> > > Attrs.VectorizerUnroll))};
>> > >      Args.push_back(MDNode::get(Ctx, Vals));
>> > >    }
>> > >
>> > >    // Setting vectorizer.enable
>> > >    if (Attrs.VectorizerEnable != LoopAttributes::VecUnspecified) {
>> > > -    Value *Vals[] = { MDString::get(Ctx,
>> > > "llvm.loop.vectorize.enable"),
>> > > -                      ConstantInt::get(Type::getInt1Ty(Ctx),
>> > > -                                       (Attrs.VectorizerEnable ==
>> > > -                                        LoopAttributes::VecEnable))
>> > > };
>> > > +    Metadata *Vals[] = {
>> > > +        MDString::get(Ctx, "llvm.loop.vectorize.enable"),
>> > > +        ConstantAsMetadata::get(ConstantInt::get(
>> > > +            Type::getInt1Ty(Ctx),
>> > > +            (Attrs.VectorizerEnable == LoopAttributes::VecEnable)))};
>> > >      Args.push_back(MDNode::get(Ctx, Vals));
>> > >    }
>> > >
>> > > -  MDNode *LoopID = MDNode::get(Ctx, Args);
>> > > -  assert(LoopID->use_empty() && "LoopID should not be used");
>> > > -
>> > >    // Set the first operand to itself.
>> > > +  MDNode *LoopID = MDNode::get(Ctx, Args);
>> > >    LoopID->replaceOperandWith(0, LoopID);
>> > >    MDNode::deleteTemporary(TempNode);
>> > >    return LoopID;
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CGObjC.cpp
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGObjC.cpp?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CGObjC.cpp (original)
>> > > +++ cfe/trunk/lib/CodeGen/CGObjC.cpp Tue Dec  9 12:39:32 2014
>> > > @@ -1938,9 +1938,8 @@ llvm::Value *CodeGenFunction::EmitARCRet
>> > >        = cast<llvm::CallInst>(result->stripPointerCasts());
>> > >      assert(call->getCalledValue() ==
>> > > CGM.getARCEntrypoints().objc_retainBlock);
>> > >
>> > > -    SmallVector<llvm::Value*,1> args;
>> > >      call->setMetadata("clang.arc.copy_on_escape",
>> > > -                      llvm::MDNode::get(Builder.getContext(), args));
>> > > +                      llvm::MDNode::get(Builder.getContext(), None));
>> > >    }
>> > >
>> > >    return result;
>> > > @@ -1982,8 +1981,8 @@ CodeGenFunction::EmitARCRetainAutoreleas
>> > >
>> > > "clang.arc.retainAutoreleasedReturnValueMarker");
>> > >        assert(metadata->getNumOperands() <= 1);
>> > >        if (metadata->getNumOperands() == 0) {
>> > > -        llvm::Value *string = llvm::MDString::get(getLLVMContext(),
>> > > assembly);
>> > > -        metadata->addOperand(llvm::MDNode::get(getLLVMContext(),
>> > > string));
>> > > +        metadata->addOperand(llvm::MDNode::get(
>> > > +            getLLVMContext(), llvm::MDString::get(getLLVMContext(),
>> > > assembly)));
>> > >        }
>> > >      }
>> > >    }
>> > > @@ -2016,9 +2015,8 @@ void CodeGenFunction::EmitARCRelease(llv
>> > >    llvm::CallInst *call = EmitNounwindRuntimeCall(fn, value);
>> > >
>> > >    if (precise == ARCImpreciseLifetime) {
>> > > -    SmallVector<llvm::Value*,1> args;
>> > >      call->setMetadata("clang.imprecise_release",
>> > > -                      llvm::MDNode::get(Builder.getContext(), args));
>> > > +                      llvm::MDNode::get(Builder.getContext(), None));
>> > >    }
>> > >  }
>> > >
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CGObjCGNU.cpp
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGObjCGNU.cpp?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CGObjCGNU.cpp (original)
>> > > +++ cfe/trunk/lib/CodeGen/CGObjCGNU.cpp Tue Dec  9 12:39:32 2014
>> > > @@ -1296,11 +1296,11 @@ CGObjCGNU::GenerateMessageSendSuper(Code
>> > >    llvm::Value *imp = LookupIMPSuper(CGF, ObjCSuper, cmd, MSI);
>> > >    imp = EnforceType(Builder, imp, MSI.MessengerType);
>> > >
>> > > -  llvm::Value *impMD[] = {
>> > > +  llvm::Metadata *impMD[] = {
>> > >        llvm::MDString::get(VMContext, Sel.getAsString()),
>> > >        llvm::MDString::get(VMContext,
>> > > Class->getSuperClass()->getNameAsString()),
>> > > -      llvm::ConstantInt::get(llvm::Type::getInt1Ty(VMContext),
>> > > IsClassMessage)
>> > > -   };
>> > > +      llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
>> > > +          llvm::Type::getInt1Ty(VMContext), IsClassMessage))};
>> > >    llvm::MDNode *node = llvm::MDNode::get(VMContext, impMD);
>> > >
>> > >    llvm::Instruction *call;
>> > > @@ -1371,12 +1371,11 @@ CGObjCGNU::GenerateMessageSend(CodeGenFu
>> > >    cmd = EnforceType(Builder, cmd, SelectorTy);
>> > >    Receiver = EnforceType(Builder, Receiver, IdTy);
>> > >
>> > > -  llvm::Value *impMD[] = {
>> > > -        llvm::MDString::get(VMContext, Sel.getAsString()),
>> > > -        llvm::MDString::get(VMContext, Class ?
>> > > Class->getNameAsString() :""),
>> > > -        llvm::ConstantInt::get(llvm::Type::getInt1Ty(VMContext),
>> > > -                               Class!=nullptr)
>> > > -   };
>> > > +  llvm::Metadata *impMD[] = {
>> > > +      llvm::MDString::get(VMContext, Sel.getAsString()),
>> > > +      llvm::MDString::get(VMContext, Class ? Class->getNameAsString()
>> > > : ""),
>> > > +      llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
>> > > +          llvm::Type::getInt1Ty(VMContext), Class != nullptr))};
>> > >    llvm::MDNode *node = llvm::MDNode::get(VMContext, impMD);
>> > >
>> > >    CallArgList ActualArgs;
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CGObjCMac.cpp
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGObjCMac.cpp?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CGObjCMac.cpp (original)
>> > > +++ cfe/trunk/lib/CodeGen/CGObjCMac.cpp Tue Dec  9 12:39:32 2014
>> > > @@ -4278,11 +4278,10 @@ void CGObjCCommonMac::EmitImageInfo() {
>> > >                          eImageInfo_GCOnly);
>> > >
>> > >        // Require that GC be specified and set to
>> > > eImageInfo_GarbageCollected.
>> > > -      llvm::Value *Ops[2] = {
>> > > -        llvm::MDString::get(VMContext, "Objective-C Garbage
>> > > Collection"),
>> > > -        llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext),
>> > > -                               eImageInfo_GarbageCollected)
>> > > -      };
>> > > +      llvm::Metadata *Ops[2] = {
>> > > +          llvm::MDString::get(VMContext, "Objective-C Garbage
>> > > Collection"),
>> > > +          llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
>> > > +              llvm::Type::getInt32Ty(VMContext),
>> > > eImageInfo_GarbageCollected))};
>> > >        Mod.addModuleFlag(llvm::Module::Require, "Objective-C GC Only",
>> > >                          llvm::MDNode::get(VMContext, Ops));
>> > >      }
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CGStmt.cpp
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGStmt.cpp?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CGStmt.cpp (original)
>> > > +++ cfe/trunk/lib/CodeGen/CGStmt.cpp Tue Dec  9 12:39:32 2014
>> > > @@ -591,7 +591,9 @@ void CodeGenFunction::EmitCondBrHints(ll
>> > >      return;
>> > >
>> > >    // Add vectorize and unroll hints to the metadata on the
>> > > conditional branch.
>> > > -  SmallVector<llvm::Value *, 2> Metadata(1);
>> > > +  //
>> > > +  // FIXME: Should this really start with a size of 1?
>> > > +  SmallVector<llvm::Metadata *, 2> Metadata(1);
>> > >    for (const auto *Attr : Attrs) {
>> > >      const LoopHintAttr *LH = dyn_cast<LoopHintAttr>(Attr);
>> > >
>> > > @@ -629,7 +631,7 @@ void CodeGenFunction::EmitCondBrHints(ll
>> > >        ValueInt = static_cast<int>(ValueAPS.getSExtValue());
>> > >      }
>> > >
>> > > -    llvm::Value *Value;
>> > > +    llvm::Constant *Value;
>> > >      llvm::MDString *Name;
>> > >      switch (Option) {
>> > >      case LoopHintAttr::Vectorize:
>> > > @@ -656,15 +658,16 @@ void CodeGenFunction::EmitCondBrHints(ll
>> > >        break;
>> > >      }
>> > >
>> > > -    SmallVector<llvm::Value *, 2> OpValues;
>> > > +    SmallVector<llvm::Metadata *, 2> OpValues;
>> > >      OpValues.push_back(Name);
>> > >      if (Value)
>> > > -      OpValues.push_back(Value);
>> > > +      OpValues.push_back(llvm::ConstantAsMetadata::get(Value));
>> > >
>> > >      // Set or overwrite metadata indicated by Name.
>> > >      Metadata.push_back(llvm::MDNode::get(Context, OpValues));
>> > >    }
>> > >
>> > > +  // FIXME: This condition is never false.  Should it be an assert?
>> > >    if (!Metadata.empty()) {
>> > >      // Add llvm.loop MDNode to CondBr.
>> > >      llvm::MDNode *LoopID = llvm::MDNode::get(Context, Metadata);
>> > > @@ -1766,10 +1769,10 @@ llvm::Value* CodeGenFunction::EmitAsmInp
>> > >  /// asm.
>> > >  static llvm::MDNode *getAsmSrcLocInfo(const StringLiteral *Str,
>> > >                                        CodeGenFunction &CGF) {
>> > > -  SmallVector<llvm::Value *, 8> Locs;
>> > > +  SmallVector<llvm::Metadata *, 8> Locs;
>> > >    // Add the location of the first line to the MDNode.
>> > > -  Locs.push_back(llvm::ConstantInt::get(CGF.Int32Ty,
>> > > -
>> > > Str->getLocStart().getRawEncoding()));
>> > > +
>> > > Locs.push_back(llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
>> > > +      CGF.Int32Ty, Str->getLocStart().getRawEncoding())));
>> > >    StringRef StrVal = Str->getString();
>> > >    if (!StrVal.empty()) {
>> > >      const SourceManager &SM =
>> > > CGF.CGM.getContext().getSourceManager();
>> > > @@ -1781,8 +1784,8 @@ static llvm::MDNode *getAsmSrcLocInfo(co
>> > >        if (StrVal[i] != '\n') continue;
>> > >        SourceLocation LineLoc = Str->getLocationOfByte(i+1, SM,
>> > > LangOpts,
>> > >
>> > > CGF.getTarget());
>> > > -      Locs.push_back(llvm::ConstantInt::get(CGF.Int32Ty,
>> > > -
>> > > LineLoc.getRawEncoding()));
>> > > +      Locs.push_back(llvm::ConstantAsMetadata::get(
>> > > +          llvm::ConstantInt::get(CGF.Int32Ty,
>> > > LineLoc.getRawEncoding())));
>> > >      }
>> > >    }
>> > >
>> > > @@ -2052,7 +2055,9 @@ void CodeGenFunction::EmitAsmStmt(const
>> > >    } else {
>> > >      // At least put the line number on MS inline asm blobs.
>> > >      auto Loc = llvm::ConstantInt::get(Int32Ty,
>> > > S.getAsmLoc().getRawEncoding());
>> > > -    Result->setMetadata("srcloc", llvm::MDNode::get(getLLVMContext(),
>> > > Loc));
>> > > +    Result->setMetadata("srcloc",
>> > > +                        llvm::MDNode::get(getLLVMContext(),
>> > > +
>> > > llvm::ConstantAsMetadata::get(Loc)));
>> > >    }
>> > >
>> > >    // Extract all of the register value results from the asm.
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CodeGenFunction.cpp
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenFunction.cpp?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CodeGenFunction.cpp (original)
>> > > +++ cfe/trunk/lib/CodeGen/CodeGenFunction.cpp Tue Dec  9 12:39:32 2014
>> > > @@ -349,9 +349,9 @@ void CodeGenFunction::EmitMCountInstrume
>> > >  // information in the program executable. The argument information
>> > > stored
>> > >  // includes the argument name, its type, the address and access
>> > > qualifiers used.
>> > >  static void GenOpenCLArgMetadata(const FunctionDecl *FD,
>> > > llvm::Function *Fn,
>> > > -                                 CodeGenModule &CGM,llvm::LLVMContext
>> > > &Context,
>> > > -                                 SmallVector <llvm::Value*, 5>
>> > > &kernelMDArgs,
>> > > -                                 CGBuilderTy& Builder, ASTContext
>> > > &ASTCtx) {
>> > > +                                 CodeGenModule &CGM,
>> > > llvm::LLVMContext &Context,
>> > > +                                 SmallVector<llvm::Metadata *, 5>
>> > > &kernelMDArgs,
>> > > +                                 CGBuilderTy &Builder, ASTContext
>> > > &ASTCtx) {
>> > >    // Create MDNodes that represent the kernel arg metadata.
>> > >    // Each MDNode is a list in the form of "key", N number of values
>> > > which is
>> > >    // the same number of values as their are kernel arguments.
>> > > @@ -359,28 +359,28 @@ static void GenOpenCLArgMetadata(const F
>> > >    const PrintingPolicy &Policy = ASTCtx.getPrintingPolicy();
>> > >
>> > >    // MDNode for the kernel argument address space qualifiers.
>> > > -  SmallVector<llvm::Value*, 8> addressQuals;
>> > > +  SmallVector<llvm::Metadata *, 8> addressQuals;
>> > >    addressQuals.push_back(llvm::MDString::get(Context,
>> > > "kernel_arg_addr_space"));
>> > >
>> > >    // MDNode for the kernel argument access qualifiers (images only).
>> > > -  SmallVector<llvm::Value*, 8> accessQuals;
>> > > +  SmallVector<llvm::Metadata *, 8> accessQuals;
>> > >    accessQuals.push_back(llvm::MDString::get(Context,
>> > > "kernel_arg_access_qual"));
>> > >
>> > >    // MDNode for the kernel argument type names.
>> > > -  SmallVector<llvm::Value*, 8> argTypeNames;
>> > > +  SmallVector<llvm::Metadata *, 8> argTypeNames;
>> > >    argTypeNames.push_back(llvm::MDString::get(Context,
>> > > "kernel_arg_type"));
>> > >
>> > >    // MDNode for the kernel argument base type names.
>> > > -  SmallVector<llvm::Value*, 8> argBaseTypeNames;
>> > > +  SmallVector<llvm::Metadata *, 8> argBaseTypeNames;
>> > >    argBaseTypeNames.push_back(
>> > >        llvm::MDString::get(Context, "kernel_arg_base_type"));
>> > >
>> > >    // MDNode for the kernel argument type qualifiers.
>> > > -  SmallVector<llvm::Value*, 8> argTypeQuals;
>> > > +  SmallVector<llvm::Metadata *, 8> argTypeQuals;
>> > >    argTypeQuals.push_back(llvm::MDString::get(Context,
>> > > "kernel_arg_type_qual"));
>> > >
>> > >    // MDNode for the kernel argument names.
>> > > -  SmallVector<llvm::Value*, 8> argNames;
>> > > +  SmallVector<llvm::Metadata *, 8> argNames;
>> > >    argNames.push_back(llvm::MDString::get(Context,
>> > > "kernel_arg_name"));
>> > >
>> > >    for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) {
>> > > @@ -392,8 +392,8 @@ static void GenOpenCLArgMetadata(const F
>> > >        QualType pointeeTy = ty->getPointeeType();
>> > >
>> > >        // Get address qualifier.
>> > > -
>> > > addressQuals.push_back(Builder.getInt32(ASTCtx.getTargetAddressSpace(
>> > > -        pointeeTy.getAddressSpace())));
>> > > +
>> > > addressQuals.push_back(llvm::ConstantAsMetadata::get(Builder.getInt32(
>> > > +
>> > > ASTCtx.getTargetAddressSpace(pointeeTy.getAddressSpace()))));
>> > >
>> > >        // Get argument type name.
>> > >        std::string typeName =
>> > > @@ -432,7 +432,8 @@ static void GenOpenCLArgMetadata(const F
>> > >          AddrSpc =
>> > >
>> > > CGM.getContext().getTargetAddressSpace(LangAS::opencl_global);
>> > >
>> > > -      addressQuals.push_back(Builder.getInt32(AddrSpc));
>> > > +      addressQuals.push_back(
>> > > +          llvm::ConstantAsMetadata::get(Builder.getInt32(AddrSpc)));
>> > >
>> > >        // Get argument type name.
>> > >        std::string typeName =
>> > > ty.getUnqualifiedType().getAsString(Policy);
>> > > @@ -495,8 +496,8 @@ void CodeGenFunction::EmitOpenCLKernelMe
>> > >
>> > >    llvm::LLVMContext &Context = getLLVMContext();
>> > >
>> > > -  SmallVector <llvm::Value*, 5> kernelMDArgs;
>> > > -  kernelMDArgs.push_back(Fn);
>> > > +  SmallVector<llvm::Metadata *, 5> kernelMDArgs;
>> > > +  kernelMDArgs.push_back(llvm::ConstantAsMetadata::get(Fn));
>> > >
>> > >    GenOpenCLArgMetadata(FD, Fn, CGM, Context, kernelMDArgs, Builder,
>> > >                         getContext());
>> > > @@ -507,33 +508,31 @@ void CodeGenFunction::EmitOpenCLKernelMe
>> > >      bool isSignedInteger =
>> > >          hintQTy->isSignedIntegerType() ||
>> > >          (hintEltQTy &&
>> > > hintEltQTy->getElementType()->isSignedIntegerType());
>> > > -    llvm::Value *attrMDArgs[] = {
>> > > -      llvm::MDString::get(Context, "vec_type_hint"),
>> > > -
>> > > llvm::UndefValue::get(CGM.getTypes().ConvertType(A->getTypeHint())),
>> > > -      llvm::ConstantInt::get(
>> > > -          llvm::IntegerType::get(Context, 32),
>> > > -          llvm::APInt(32, (uint64_t)(isSignedInteger ? 1 : 0)))
>> > > -    };
>> > > +    llvm::Metadata *attrMDArgs[] = {
>> > > +        llvm::MDString::get(Context, "vec_type_hint"),
>> > > +        llvm::ConstantAsMetadata::get(llvm::UndefValue::get(
>> > > +            CGM.getTypes().ConvertType(A->getTypeHint()))),
>> > > +        llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
>> > > +            llvm::IntegerType::get(Context, 32),
>> > > +            llvm::APInt(32, (uint64_t)(isSignedInteger ? 1 : 0))))};
>> > >      kernelMDArgs.push_back(llvm::MDNode::get(Context, attrMDArgs));
>> > >    }
>> > >
>> > >    if (const WorkGroupSizeHintAttr *A =
>> > > FD->getAttr<WorkGroupSizeHintAttr>()) {
>> > > -    llvm::Value *attrMDArgs[] = {
>> > > -      llvm::MDString::get(Context, "work_group_size_hint"),
>> > > -      Builder.getInt32(A->getXDim()),
>> > > -      Builder.getInt32(A->getYDim()),
>> > > -      Builder.getInt32(A->getZDim())
>> > > -    };
>> > > +    llvm::Metadata *attrMDArgs[] = {
>> > > +        llvm::MDString::get(Context, "work_group_size_hint"),
>> > > +
>> > > llvm::ConstantAsMetadata::get(Builder.getInt32(A->getXDim())),
>> > > +
>> > > llvm::ConstantAsMetadata::get(Builder.getInt32(A->getYDim())),
>> > > +
>> > > llvm::ConstantAsMetadata::get(Builder.getInt32(A->getZDim()))};
>> > >      kernelMDArgs.push_back(llvm::MDNode::get(Context, attrMDArgs));
>> > >    }
>> > >
>> > >    if (const ReqdWorkGroupSizeAttr *A =
>> > > FD->getAttr<ReqdWorkGroupSizeAttr>()) {
>> > > -    llvm::Value *attrMDArgs[] = {
>> > > -      llvm::MDString::get(Context, "reqd_work_group_size"),
>> > > -      Builder.getInt32(A->getXDim()),
>> > > -      Builder.getInt32(A->getYDim()),
>> > > -      Builder.getInt32(A->getZDim())
>> > > -    };
>> > > +    llvm::Metadata *attrMDArgs[] = {
>> > > +        llvm::MDString::get(Context, "reqd_work_group_size"),
>> > > +
>> > > llvm::ConstantAsMetadata::get(Builder.getInt32(A->getXDim())),
>> > > +
>> > > llvm::ConstantAsMetadata::get(Builder.getInt32(A->getYDim())),
>> > > +
>> > > llvm::ConstantAsMetadata::get(Builder.getInt32(A->getZDim()))};
>> > >      kernelMDArgs.push_back(llvm::MDNode::get(Context, attrMDArgs));
>> > >    }
>> > >
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CodeGenModule.cpp
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.cpp?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CodeGenModule.cpp (original)
>> > > +++ cfe/trunk/lib/CodeGen/CodeGenModule.cpp Tue Dec  9 12:39:32 2014
>> > > @@ -952,29 +952,28 @@ void CodeGenModule::emitLLVMUsed() {
>> > >  }
>> > >
>> > >  void CodeGenModule::AppendLinkerOptions(StringRef Opts) {
>> > > -  llvm::Value *MDOpts = llvm::MDString::get(getLLVMContext(), Opts);
>> > > +  auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opts);
>> > >    LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(),
>> > > MDOpts));
>> > >  }
>> > >
>> > >  void CodeGenModule::AddDetectMismatch(StringRef Name, StringRef
>> > > Value) {
>> > >    llvm::SmallString<32> Opt;
>> > >    getTargetCodeGenInfo().getDetectMismatchOption(Name, Value, Opt);
>> > > -  llvm::Value *MDOpts = llvm::MDString::get(getLLVMContext(), Opt);
>> > > +  auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opt);
>> > >    LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(),
>> > > MDOpts));
>> > >  }
>> > >
>> > >  void CodeGenModule::AddDependentLib(StringRef Lib) {
>> > >    llvm::SmallString<24> Opt;
>> > >    getTargetCodeGenInfo().getDependentLibraryOption(Lib, Opt);
>> > > -  llvm::Value *MDOpts = llvm::MDString::get(getLLVMContext(), Opt);
>> > > +  auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opt);
>> > >    LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(),
>> > > MDOpts));
>> > >  }
>> > >
>> > >  /// \brief Add link options implied by the given module, including
>> > > modules
>> > >  /// it depends on, using a postorder walk.
>> > > -static void addLinkOptionsPostorder(CodeGenModule &CGM,
>> > > -                                    Module *Mod,
>> > > -                                    SmallVectorImpl<llvm::Value *>
>> > > &Metadata,
>> > > +static void addLinkOptionsPostorder(CodeGenModule &CGM, Module *Mod,
>> > > +                                    SmallVectorImpl<llvm::Metadata *>
>> > > &Metadata,
>> > >                                      llvm::SmallPtrSet<Module *, 16>
>> > > &Visited) {
>> > >    // Import this module's parent.
>> > >    if (Mod->Parent && Visited.insert(Mod->Parent).second) {
>> > > @@ -994,10 +993,9 @@ static void addLinkOptionsPostorder(Code
>> > >      // Link against a framework.  Frameworks are currently Darwin
>> > > only, so we
>> > >      // don't to ask TargetCodeGenInfo for the spelling of the linker
>> > > option.
>> > >      if (Mod->LinkLibraries[I-1].IsFramework) {
>> > > -      llvm::Value *Args[2] = {
>> > > -        llvm::MDString::get(Context, "-framework"),
>> > > -        llvm::MDString::get(Context, Mod->LinkLibraries[I-1].Library)
>> > > -      };
>> > > +      llvm::Metadata *Args[2] = {
>> > > +          llvm::MDString::get(Context, "-framework"),
>> > > +          llvm::MDString::get(Context, Mod->LinkLibraries[I -
>> > > 1].Library)};
>> > >
>> > >        Metadata.push_back(llvm::MDNode::get(Context, Args));
>> > >        continue;
>> > > @@ -1007,7 +1005,7 @@ static void addLinkOptionsPostorder(Code
>> > >      llvm::SmallString<24> Opt;
>> > >      CGM.getTargetCodeGenInfo().getDependentLibraryOption(
>> > >        Mod->LinkLibraries[I-1].Library, Opt);
>> > > -    llvm::Value *OptString = llvm::MDString::get(Context, Opt);
>> > > +    auto *OptString = llvm::MDString::get(Context, Opt);
>> > >      Metadata.push_back(llvm::MDNode::get(Context, OptString));
>> > >    }
>> > >  }
>> > > @@ -1060,7 +1058,7 @@ void CodeGenModule::EmitModuleLinkOption
>> > >    // Add link options for all of the imported modules in reverse
>> > > topological
>> > >    // order.  We don't do anything to try to order import link flags
>> > > with respect
>> > >    // to linker options inserted by things like #pragma comment().
>> > > -  SmallVector<llvm::Value *, 16> MetadataArgs;
>> > > +  SmallVector<llvm::Metadata *, 16> MetadataArgs;
>> > >    Visited.clear();
>> > >    for (llvm::SetVector<clang::Module *>::iterator M =
>> > > LinkModules.begin(),
>> > >                                                 MEnd =
>> > > LinkModules.end();
>> > > @@ -3396,10 +3394,9 @@ static void EmitGlobalDeclMetadata(CodeG
>> > >
>> > > CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs");
>> > >
>> > >    // TODO: should we report variant information for ctors/dtors?
>> > > -  llvm::Value *Ops[] = {
>> > > -    Addr,
>> > > -    GetPointerConstant(CGM.getLLVMContext(), D.getDecl())
>> > > -  };
>> > > +  llvm::Metadata *Ops[] = {llvm::ConstantAsMetadata::get(Addr),
>> > > +
>> > > llvm::ConstantAsMetadata::get(GetPointerConstant(
>> > > +                               CGM.getLLVMContext(), D.getDecl()))};
>> > >    GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(),
>> > > Ops));
>> > >  }
>> > >
>> > > @@ -3462,7 +3459,9 @@ void CodeGenFunction::EmitDeclMetadata()
>> > >      llvm::Value *Addr = I.second;
>> > >      if (auto *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) {
>> > >        llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D);
>> > > -      Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context,
>> > > DAddr));
>> > > +      Alloca->setMetadata(
>> > > +          DeclPtrKind, llvm::MDNode::get(
>> > > +                           Context,
>> > > llvm::ValueAsMetadata::getConstant(DAddr)));
>> > >      } else if (auto *GV = dyn_cast<llvm::GlobalValue>(Addr)) {
>> > >        GlobalDecl GD = GlobalDecl(cast<VarDecl>(D));
>> > >        EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV);
>> > > @@ -3476,9 +3475,7 @@ void CodeGenModule::EmitVersionIdentMeta
>> > >    std::string Version = getClangFullVersion();
>> > >    llvm::LLVMContext &Ctx = TheModule.getContext();
>> > >
>> > > -  llvm::Value *IdentNode[] = {
>> > > -    llvm::MDString::get(Ctx, Version)
>> > > -  };
>> > > +  llvm::Metadata *IdentNode[] = {llvm::MDString::get(Ctx, Version)};
>> > >    IdentMetadata->addOperand(llvm::MDNode::get(Ctx, IdentNode));
>> > >  }
>> > >
>> > > @@ -3506,9 +3503,8 @@ void CodeGenModule::EmitCoverageFile() {
>> > >            llvm::MDString::get(Ctx, getCodeGenOpts().CoverageFile);
>> > >        for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) {
>> > >          llvm::MDNode *CU = CUNode->getOperand(i);
>> > > -        llvm::Value *node[] = { CoverageFile, CU };
>> > > -        llvm::MDNode *N = llvm::MDNode::get(Ctx, node);
>> > > -        GCov->addOperand(N);
>> > > +        llvm::Metadata *Elts[] = {CoverageFile, CU};
>> > > +        GCov->addOperand(llvm::MDNode::get(Ctx, Elts));
>> > >        }
>> > >      }
>> > >    }
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/CodeGenModule.h
>> > > URL:
>> > > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.h?rev=223803&r1=223802&r2=223803&view=diff
>> > >
>> > > ==============================================================================
>> > > --- cfe/trunk/lib/CodeGen/CodeGenModule.h (original)
>> > > +++ cfe/trunk/lib/CodeGen/CodeGenModule.h Tue Dec  9 12:39:32 2014
>> > > @@ -421,7 +421,7 @@ class CodeGenModule : public CodeGenType
>> > >    llvm::SetVector<clang::Module *> ImportedModules;
>> > >
>> > >    /// \brief A vector of metadata strings.
>> > > -  SmallVector<llvm::Value *, 16> LinkerOptionsMetadata;
>> > > +  SmallVector<llvm::Metadata *, 16> LinkerOptionsMetadata;
>> > >
>> > >    /// @name Cache for Objective-C runtime types
>> > >    /// @{
>> > > @@ -591,9 +591,7 @@ public:
>> > >
>> > >    llvm::MDNode *getNoObjCARCExceptionsMetadata() {
>> > >      if (!NoObjCARCExceptionsMetadata)
>> > > -      NoObjCARCExceptionsMetadata =
>> > > -        llvm::MDNode::get(getLLVMContext(),
>> > > -                          SmallVector<llvm::Value*,1>());
>> > > +      NoObjCARCExceptionsMetadata =
>> > > llvm::MDNode::get(getLLVMContext(), None);
>> > >      return NoObjCARCExceptionsMetadata;
>> > >    }
>> > >
>> > >
>> > > Modified: cfe/trunk/lib/CodeGen/SanitizerMetadata.cpp
>> > > URL:
>
>
>
> --
> Saleem Abdulrasool
> compnerd (at) compnerd (dot) org
>
> _______________________________________________
> cfe-commits mailing list
> cfe-commits at cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
>
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