Move VariableDbgInfo from MachineModuleInfo to MachineFunction

[MatzeB]

Summary

VariableDbgInfo is per function data, so it makes sense to have it with
the function instead of the module.

This is a necessary step to have machine module passes work properly.

[MatzeB]

Slightly simplify patch by not adding const MachineFunction& parameters to some AsmPrinter functions. The current function is accessible by Asm->MF.

[MatzeB]

Upload correctly updated patch this time :)

[echristo]

LGTM.

-eric

include/llvm/CodeGen/MachineFunction.h

class MachineFunction {
   /// objects and get rid of all the XXXInfo data structure, but keep
   /// unchanged the references to Fn, Target, MMI, and FunctionNumber.
   void clear();
   /// Allocate and initialize the different members.
   /// In particular, the XXXInfo data structure.
   /// \pre Fn, Target, MMI, and FunctionNumber are properly set.
   void init();
 public:
+
+  struct VariableDbgInfo {
+    const DILocalVariable *Var;
+    const DIExpression *Expr;
+    unsigned Slot;
+    const DILocation *Loc;
+
+    VariableDbgInfo(const DILocalVariable *Var, const DIExpression *Expr,
+                    unsigned Slot, const DILocation *Loc)
+        : Var(Var), Expr(Expr), Slot(Slot), Loc(Loc) {}
+  };
+  typedef SmallVector<VariableDbgInfo, 4> VariableDbgInfoMapTy;
+  VariableDbgInfoMapTy VariableDbgInfos;
+
   MachineFunction(const Function *Fn, const TargetMachine &TM,
                   unsigned FunctionNum, MachineModuleInfo &MMI);
   ~MachineFunction();
 
   /// Reset the instance as if it was just created.
   void reset() {
     clear();
     init();
public:
   const std::vector<MCCFIInstruction> &getFrameInstructions() const {
     return FrameInstructions;
   }
 
   LLVM_NODISCARD unsigned addFrameInst(const MCCFIInstruction &Inst) {
     FrameInstructions.push_back(Inst);
     return FrameInstructions.size() - 1;
   }
+
+  /// Collect information used to emit debugging information of a variable.
+  void setVariableDbgInfo(const DILocalVariable *Var, const DIExpression *Expr,
+                          unsigned Slot, const DILocation *Loc) {
+    VariableDbgInfos.emplace_back(Var, Expr, Slot, Loc);
+  }
+
+  VariableDbgInfoMapTy &getVariableDbgInfo() { return VariableDbgInfos; }
+  const VariableDbgInfoMapTy &getVariableDbgInfo() const {
+    return VariableDbgInfos;
+  }
 };
 
 //===--------------------------------------------------------------------===//
 // GraphTraits specializations for function basic block graphs (CFGs)
 //===--------------------------------------------------------------------===//
 
 // Provide specializations of GraphTraits to be able to treat a
 // machine function as a graph of machine basic blocks... these are

include/llvm/CodeGen/MachineModuleInfo.h

class MachineModuleInfo : public ImmutablePass {
   /// Next unique number available for a MachineFunction.
   unsigned NextFnNum = 0;
   const Function *LastRequest = nullptr; ///< Used for shortcut/cache.
   MachineFunction *LastResult = nullptr; ///< Used for shortcut/cache.
 
 public:
   static char ID; // Pass identification, replacement for typeid
 
-  struct VariableDbgInfo {
-    const DILocalVariable *Var;
-    const DIExpression *Expr;
-    unsigned Slot;
-    const DILocation *Loc;
-
-    VariableDbgInfo(const DILocalVariable *Var, const DIExpression *Expr,
-                    unsigned Slot, const DILocation *Loc)
-        : Var(Var), Expr(Expr), Slot(Slot), Loc(Loc) {}
-  };
-  typedef SmallVector<VariableDbgInfo, 4> VariableDbgInfoMapTy;
-  VariableDbgInfoMapTy VariableDbgInfos;
-
   explicit MachineModuleInfo(const TargetMachine *TM = nullptr);
   ~MachineModuleInfo() override;
 
   // Initialization and Finalization
   bool doInitialization(Module &) override;
   bool doFinalization(Module &) override;
 
   /// Discard function meta information.
const std::vector<const GlobalValue *> &getTypeInfos() const {
     return TypeInfos;
   }
 
   /// Return a reference to the typeids encoding filters used in the current
   /// function.
   const std::vector<unsigned> &getFilterIds() const {
     return FilterIds;
   }
-
-  /// Collect information used to emit debugging information of a variable.
-  void setVariableDbgInfo(const DILocalVariable *Var, const DIExpression *Expr,
-                          unsigned Slot, const DILocation *Loc) {
-    VariableDbgInfos.emplace_back(Var, Expr, Slot, Loc);
-  }
-
-  VariableDbgInfoMapTy &getVariableDbgInfo() { return VariableDbgInfos; }
-
 }; // End class MachineModuleInfo
 
 //===- MMI building helpers -----------------------------------------------===//
 
 /// Determine if any floating-point values are being passed to this variadic
 /// function, and set the MachineModuleInfo's usesVAFloatArgument flag if so.
 /// This flag is used to emit an undefined reference to _fltused on Windows,
 /// which will link in MSVCRT's floating-point support.

lib/CodeGen/AsmPrinter/CodeViewDebug.h

class LLVM_LIBRARY_VISIBILITY CodeViewDebug : public DebugHandlerBase {
 
   void emitInlinedCallSite(const FunctionInfo &FI, const DILocation *InlinedAt,
                            const InlineSite &Site);
 
   typedef DbgValueHistoryMap::InlinedVariable InlinedVariable;
 
   void collectVariableInfo(const DISubprogram *SP);
 
-  void collectVariableInfoFromMMITable(DenseSet<InlinedVariable> &Processed);
+  void collectVariableInfoFromMFTable(DenseSet<InlinedVariable> &Processed);
 
   /// Records information about a local variable in the appropriate scope. In
   /// particular, locals from inlined code live inside the inlining site.
   void recordLocalVariable(LocalVariable &&Var, const DILocation *Loc);
 
   /// Emits local variables in the appropriate order.
   void emitLocalVariableList(ArrayRef<LocalVariable> Locals);
 

lib/CodeGen/AsmPrinter/CodeViewDebug.cpp

CodeViewDebug::createDefRangeGeneral(uint16_t CVRegister, bool InMemory,
   DR.InMemory = InMemory;
   DR.DataOffset = Offset;
   DR.IsSubfield = IsSubfield;
   DR.StructOffset = StructOffset;
   DR.CVRegister = CVRegister;
   return DR;
 }
 
-void CodeViewDebug::collectVariableInfoFromMMITable(
+void CodeViewDebug::collectVariableInfoFromMFTable(
     DenseSet<InlinedVariable> &Processed) {
-  const TargetSubtargetInfo &TSI = Asm->MF->getSubtarget();
+  const MachineFunction &MF = *Asm->MF;
+  const TargetSubtargetInfo &TSI = MF.getSubtarget();
   const TargetFrameLowering *TFI = TSI.getFrameLowering();
   const TargetRegisterInfo *TRI = TSI.getRegisterInfo();
 
-  for (const MachineModuleInfo::VariableDbgInfo &VI :
-       MMI->getVariableDbgInfo()) {
+  for (const MachineFunction::VariableDbgInfo &VI : MF.getVariableDbgInfo()) {
     if (!VI.Var)
       continue;
     assert(VI.Var->isValidLocationForIntrinsic(VI.Loc) &&
            "Expected inlined-at fields to agree");
 
     Processed.insert(InlinedVariable(VI.Var, VI.Loc->getInlinedAt()));
     LexicalScope *Scope = LScopes.findLexicalScope(VI.Loc);
 
for (const MachineFunction::VariableDbgInfo &VI : MF.getVariableDbgInfo()) {
     Var.DefRanges.emplace_back(std::move(DefRange));
     recordLocalVariable(std::move(Var), VI.Loc->getInlinedAt());
   }
 }
 
 void CodeViewDebug::collectVariableInfo(const DISubprogram *SP) {
   DenseSet<InlinedVariable> Processed;
   // Grab the variable info that was squirreled away in the MMI side-table.
-  collectVariableInfoFromMMITable(Processed);
+  collectVariableInfoFromMFTable(Processed);
 
   const TargetRegisterInfo *TRI = Asm->MF->getSubtarget().getRegisterInfo();
 
   for (const auto &I : DbgValues) {
     InlinedVariable IV = I.first;
     if (Processed.count(IV))
       continue;
     const DILocalVariable *DIVar = IV.first;

lib/CodeGen/AsmPrinter/DwarfDebug.h

class DwarfDebug : public DebugHandlerBase {
   /// Register a source line with debug info. Returns the unique
   /// label that was emitted and which provides correspondence to the
   /// source line list.
   void recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope,
                         unsigned Flags);
 
   /// Populate LexicalScope entries with variables' info.
   void collectVariableInfo(DwarfCompileUnit &TheCU, const DISubprogram *SP,
+                           const MachineFunction &MF,
                            DenseSet<InlinedVariable> &ProcessedVars);
 
   /// Build the location list for all DBG_VALUEs in the
   /// function that describe the same variable.
   void buildLocationList(SmallVectorImpl<DebugLocEntry> &DebugLoc,
                          const DbgValueHistoryMap::InstrRanges &Ranges);
 
-  /// Collect variable information from the side table maintained
-  /// by MMI.
-  void collectVariableInfoFromMMITable(DenseSet<InlinedVariable> &P);
+  /// Collect variable information from the side table maintained by MF.
+  void collectVariableInfoFromMFTable(const MachineFunction &MF,
+                                      DenseSet<InlinedVariable> &P);
 
 public:
   //===--------------------------------------------------------------------===//
   // Main entry points.
   //
   DwarfDebug(AsmPrinter *A, Module *M);
 
   ~DwarfDebug() override;

lib/CodeGen/AsmPrinter/DwarfDebug.cpp

void DwarfDebug::ensureAbstractVariableIsCreatedIfScoped(
   if (getExistingAbstractVariable(IV, Cleansed))
     return;
 
   if (LexicalScope *Scope =
           LScopes.findAbstractScope(cast_or_null<DILocalScope>(ScopeNode)))
     createAbstractVariable(Cleansed, Scope);
 }
 
-// Collect variable information from side table maintained by MMI.
-void DwarfDebug::collectVariableInfoFromMMITable(
-    DenseSet<InlinedVariable> &Processed) {
-  for (const auto &VI : MMI->getVariableDbgInfo()) {
+// Collect variable information from side table maintained by MF.
+void DwarfDebug::collectVariableInfoFromMFTable(
+    const MachineFunction &MF, DenseSet<InlinedVariable> &Processed) {
+  for (const auto &VI : MF.getVariableDbgInfo()) {
     if (!VI.Var)
       continue;
     assert(VI.Var->isValidLocationForIntrinsic(VI.Loc) &&
            "Expected inlined-at fields to agree");
 
     InlinedVariable Var(VI.Var, VI.Loc->getInlinedAt());
     Processed.insert(Var);
     LexicalScope *Scope = LScopes.findLexicalScope(VI.Loc);
for (MachineBasicBlock::const_reverse_iterator I(MInsn); I != MBB->rend(); ++I)
     if (!(I->isDebugValue() || I->getFlag(MachineInstr::FrameSetup)))
       return false;
   return true;
 }
 
 // Find variables for each lexical scope.
 void DwarfDebug::collectVariableInfo(DwarfCompileUnit &TheCU,
                                      const DISubprogram *SP,
+                                     const MachineFunction &MF,
                                      DenseSet<InlinedVariable> &Processed) {
   // Grab the variable info that was squirreled away in the MMI side-table.
-  collectVariableInfoFromMMITable(Processed);
+  collectVariableInfoFromMFTable(MF, Processed);
 
   for (const auto &I : DbgValues) {
     InlinedVariable IV = I.first;
     if (Processed.count(IV))
       continue;
 
     // Instruction ranges, specifying where IV is accessible.
     const auto &Ranges = I.second;
void DwarfDebug::endFunction(const MachineFunction *MF) {
   // Set DwarfDwarfCompileUnitID in MCContext to default value.
   Asm->OutStreamer->getContext().setDwarfCompileUnitID(0);
 
   LexicalScope *FnScope = LScopes.getCurrentFunctionScope();
   SP = cast<DISubprogram>(FnScope->getScopeNode());
   DwarfCompileUnit &TheCU = *CUMap.lookup(SP->getUnit());
 
   DenseSet<InlinedVariable> ProcessedVars;
-  collectVariableInfo(TheCU, SP, ProcessedVars);
+  collectVariableInfo(TheCU, SP, *MF, ProcessedVars);
 
   // Add the range of this function to the list of ranges for the CU.
   TheCU.addRange(RangeSpan(Asm->getFunctionBegin(), Asm->getFunctionEnd()));
 
   // Under -gmlt, skip building the subprogram if there are no inlined
   // subroutines inside it.
   if (TheCU.getCUNode()->getEmissionKind() == DICompileUnit::LineTablesOnly &&
       LScopes.getAbstractScopesList().empty() && !IsDarwin) {

lib/CodeGen/MIRParser/MIRParser.cpp

if (!Var && !Expr && !Loc)
     return false;
   DILocalVariable *DIVar = nullptr;
   DIExpression *DIExpr = nullptr;
   DILocation *DILoc = nullptr;
   if (typecheckMDNode(DIVar, Var, Object.DebugVar, "DILocalVariable", *this) ||
       typecheckMDNode(DIExpr, Expr, Object.DebugExpr, "DIExpression", *this) ||
       typecheckMDNode(DILoc, Loc, Object.DebugLoc, "DILocation", *this))
     return true;
-  PFS.MF.getMMI().setVariableDbgInfo(DIVar, DIExpr, unsigned(FrameIdx), DILoc);
+  PFS.MF.setVariableDbgInfo(DIVar, DIExpr, unsigned(FrameIdx), DILoc);
   return false;
 }
 
 bool MIRParserImpl::parseMDNode(PerFunctionMIParsingState &PFS,
     MDNode *&Node, const yaml::StringValue &Source) {
   if (Source.Value.empty())
     return false;
   SMDiagnostic Error;

lib/CodeGen/MIRPrinter.cpp

public:
   void convert(yaml::MachineFunction &MF, const MachineRegisterInfo &RegInfo,
                const TargetRegisterInfo *TRI);
   void convert(ModuleSlotTracker &MST, yaml::MachineFrameInfo &YamlMFI,
                const MachineFrameInfo &MFI);
   void convert(yaml::MachineFunction &MF,
                const MachineConstantPool &ConstantPool);
   void convert(ModuleSlotTracker &MST, yaml::MachineJumpTable &YamlJTI,
                const MachineJumpTableInfo &JTI);
-  void convertStackObjects(yaml::MachineFunction &MF,
-                           const MachineFrameInfo &MFI, MachineModuleInfo &MMI,
-                           ModuleSlotTracker &MST,
-                           const TargetRegisterInfo *TRI);
+  void convertStackObjects(yaml::MachineFunction &YMF,
+                           const MachineFunction &MF, ModuleSlotTracker &MST);
 
 private:
   void initRegisterMaskIds(const MachineFunction &MF);
 };
 
 /// This class prints out the machine instructions using the MIR serialization
 /// format.
 class MIPrinter {
YamlMF.RegBankSelected = MF.getProperties().hasProperty(
       MachineFunctionProperties::Property::RegBankSelected);
   YamlMF.Selected = MF.getProperties().hasProperty(
       MachineFunctionProperties::Property::Selected);
 
   convert(YamlMF, MF.getRegInfo(), MF.getSubtarget().getRegisterInfo());
   ModuleSlotTracker MST(MF.getFunction()->getParent());
   MST.incorporateFunction(*MF.getFunction());
   convert(MST, YamlMF.FrameInfo, MF.getFrameInfo());
-  convertStackObjects(YamlMF, MF.getFrameInfo(), MF.getMMI(), MST,
-                      MF.getSubtarget().getRegisterInfo());
+  convertStackObjects(YamlMF, MF, MST);
   if (const auto *ConstantPool = MF.getConstantPool())
     convert(YamlMF, *ConstantPool);
   if (const auto *JumpTableInfo = MF.getJumpTableInfo())
     convert(MST, YamlMF.JumpTableInfo, *JumpTableInfo);
   raw_string_ostream StrOS(YamlMF.Body.Value.Value);
   bool IsNewlineNeeded = false;
   for (const auto &MBB : MF) {
     if (IsNewlineNeeded)
void MIRPrinter::convert(ModuleSlotTracker &MST,
   }
   if (MFI.getRestorePoint()) {
     raw_string_ostream StrOS(YamlMFI.RestorePoint.Value);
     MIPrinter(StrOS, MST, RegisterMaskIds, StackObjectOperandMapping)
         .printMBBReference(*MFI.getRestorePoint());
   }
 }
 
-void MIRPrinter::convertStackObjects(yaml::MachineFunction &MF,
-                                     const MachineFrameInfo &MFI,
-                                     MachineModuleInfo &MMI,
-                                     ModuleSlotTracker &MST,
-                                     const TargetRegisterInfo *TRI) {
+void MIRPrinter::convertStackObjects(yaml::MachineFunction &YMF,
+                                     const MachineFunction &MF,
+                                     ModuleSlotTracker &MST) {
+  const MachineFrameInfo &MFI = MF.getFrameInfo();
+  const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
   // Process fixed stack objects.
   unsigned ID = 0;
   for (int I = MFI.getObjectIndexBegin(); I < 0; ++I) {
     if (MFI.isDeadObjectIndex(I))
       continue;
 
     yaml::FixedMachineStackObject YamlObject;
     YamlObject.ID = ID;
     YamlObject.Type = MFI.isSpillSlotObjectIndex(I)
                           ? yaml::FixedMachineStackObject::SpillSlot
                           : yaml::FixedMachineStackObject::DefaultType;
     YamlObject.Offset = MFI.getObjectOffset(I);
     YamlObject.Size = MFI.getObjectSize(I);
     YamlObject.Alignment = MFI.getObjectAlignment(I);
     YamlObject.IsImmutable = MFI.isImmutableObjectIndex(I);
     YamlObject.IsAliased = MFI.isAliasedObjectIndex(I);
-    MF.FixedStackObjects.push_back(YamlObject);
+    YMF.FixedStackObjects.push_back(YamlObject);
     StackObjectOperandMapping.insert(
         std::make_pair(I, FrameIndexOperand::createFixed(ID++)));
   }
 
   // Process ordinary stack objects.
   ID = 0;
   for (int I = 0, E = MFI.getObjectIndexEnd(); I < E; ++I) {
     if (MFI.isDeadObjectIndex(I))
       continue;
 
     yaml::MachineStackObject YamlObject;
     YamlObject.ID = ID;
     if (const auto *Alloca = MFI.getObjectAllocation(I))
       YamlObject.Name.Value =
           Alloca->hasName() ? Alloca->getName() : "<unnamed alloca>";
     YamlObject.Type = MFI.isSpillSlotObjectIndex(I)
                           ? yaml::MachineStackObject::SpillSlot
                           : MFI.isVariableSizedObjectIndex(I)
                                 ? yaml::MachineStackObject::VariableSized
                                 : yaml::MachineStackObject::DefaultType;
     YamlObject.Offset = MFI.getObjectOffset(I);
     YamlObject.Size = MFI.getObjectSize(I);
     YamlObject.Alignment = MFI.getObjectAlignment(I);
 
-    MF.StackObjects.push_back(YamlObject);
+    YMF.StackObjects.push_back(YamlObject);
     StackObjectOperandMapping.insert(std::make_pair(
         I, FrameIndexOperand::create(YamlObject.Name.Value, ID++)));
   }
 
   for (const auto &CSInfo : MFI.getCalleeSavedInfo()) {
     yaml::StringValue Reg;
     printReg(CSInfo.getReg(), Reg, TRI);
     auto StackObjectInfo = StackObjectOperandMapping.find(CSInfo.getFrameIdx());
     assert(StackObjectInfo != StackObjectOperandMapping.end() &&
            "Invalid stack object index");
     const FrameIndexOperand &StackObject = StackObjectInfo->second;
     if (StackObject.IsFixed)
-      MF.FixedStackObjects[StackObject.ID].CalleeSavedRegister = Reg;
+      YMF.FixedStackObjects[StackObject.ID].CalleeSavedRegister = Reg;
     else
-      MF.StackObjects[StackObject.ID].CalleeSavedRegister = Reg;
+      YMF.StackObjects[StackObject.ID].CalleeSavedRegister = Reg;
   }
   for (unsigned I = 0, E = MFI.getLocalFrameObjectCount(); I < E; ++I) {
     auto LocalObject = MFI.getLocalFrameObjectMap(I);
     auto StackObjectInfo = StackObjectOperandMapping.find(LocalObject.first);
     assert(StackObjectInfo != StackObjectOperandMapping.end() &&
            "Invalid stack object index");
     const FrameIndexOperand &StackObject = StackObjectInfo->second;
     assert(!StackObject.IsFixed && "Expected a locally mapped stack object");
-    MF.StackObjects[StackObject.ID].LocalOffset = LocalObject.second;
+    YMF.StackObjects[StackObject.ID].LocalOffset = LocalObject.second;
   }
 
   // Print the stack object references in the frame information class after
   // converting the stack objects.
   if (MFI.hasStackProtectorIndex()) {
-    raw_string_ostream StrOS(MF.FrameInfo.StackProtector.Value);
+    raw_string_ostream StrOS(YMF.FrameInfo.StackProtector.Value);
     MIPrinter(StrOS, MST, RegisterMaskIds, StackObjectOperandMapping)
         .printStackObjectReference(MFI.getStackProtectorIndex());
   }
 
   // Print the debug variable information.
-  for (MachineModuleInfo::VariableDbgInfo &DebugVar :
-       MMI.getVariableDbgInfo()) {
+  for (const MachineFunction::VariableDbgInfo &DebugVar :
+       MF.getVariableDbgInfo()) {
     auto StackObjectInfo = StackObjectOperandMapping.find(DebugVar.Slot);
     assert(StackObjectInfo != StackObjectOperandMapping.end() &&
            "Invalid stack object index");
     const FrameIndexOperand &StackObject = StackObjectInfo->second;
     assert(!StackObject.IsFixed && "Expected a non-fixed stack object");
-    auto &Object = MF.StackObjects[StackObject.ID];
+    auto &Object = YMF.StackObjects[StackObject.ID];
     {
       raw_string_ostream StrOS(Object.DebugVar.Value);
       DebugVar.Var->printAsOperand(StrOS, MST);
     }
     {
       raw_string_ostream StrOS(Object.DebugExpr.Value);
       DebugVar.Expr->printAsOperand(StrOS, MST);
     }

lib/CodeGen/MachineModuleInfo.cpp

void MachineModuleInfo::EndFunction() {
   PersonalityTypeCache = EHPersonality::Unknown;
   CallSiteMap.clear();
   TypeInfos.clear();
   FilterIds.clear();
   FilterEnds.clear();
   CallsEHReturn = false;
   CallsUnwindInit = false;
   HasEHFunclets = false;
-  VariableDbgInfos.clear();
 }
 
 //===- Address of Block Management ----------------------------------------===//
 
 ArrayRef<MCSymbol *>
 MachineModuleInfo::getAddrLabelSymbolToEmit(const BasicBlock *BB) {
   // Lazily create AddrLabelSymbols.
   if (!AddrLabelSymbols)

lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp

for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
           if (Address) {
             if (const BitCastInst *BCI = dyn_cast<BitCastInst>(Address))
               Address = BCI->getOperand(0);
             if (const AllocaInst *AI = dyn_cast<AllocaInst>(Address)) {
               DenseMap<const AllocaInst *, int>::iterator SI =
                 StaticAllocaMap.find(AI);
               if (SI != StaticAllocaMap.end()) { // Check for VLAs.
                 int FI = SI->second;
-                MMI.setVariableDbgInfo(DI->getVariable(), DI->getExpression(),
+                MF->setVariableDbgInfo(DI->getVariable(), DI->getExpression(),
                                        FI, DI->getDebugLoc());
               }
             }
           }
         }
       }
 
       // Decide the preferred extend type for a value.

lib/CodeGen/StackColoring.cpp

bool StackColoring::removeAllMarkers() {
   DEBUG(dbgs()<<"Removed "<<Count<<" markers.\n");
   return Count;
 }
 
 void StackColoring::remapInstructions(DenseMap<int, int> &SlotRemap) {
   unsigned FixedInstr = 0;
   unsigned FixedMemOp = 0;
   unsigned FixedDbg = 0;
-  MachineModuleInfo *MMI = &MF->getMMI();
 
   // Remap debug information that refers to stack slots.
-  for (auto &VI : MMI->getVariableDbgInfo()) {
+  for (auto &VI : MF->getVariableDbgInfo()) {
     if (!VI.Var)
       continue;
     if (SlotRemap.count(VI.Slot)) {
       DEBUG(dbgs() << "Remapping debug info for ["
                    << cast<DILocalVariable>(VI.Var)->getName() << "].\n");
       VI.Slot = SlotRemap[VI.Slot];
       FixedDbg++;
     }