Made MMIWP not have control over the lifetime of MMI.

Author: matinraayai

llvm/include/llvm/CodeGen/MachineModuleInfo.h

@@ -106,16 +106,18 @@ class MachineModuleInfo {
   const Function *LastRequest = nullptr; ///< Used for shortcut/cache.
   MachineFunction *LastResult = nullptr; ///< Used for shortcut/cache.
 
-  MachineModuleInfo &operator=(MachineModuleInfo &&MMII) = delete;
+  /// Deleted copy constructor
+  MachineModuleInfo(MachineModuleInfo &MMI) = delete;
+
+  /// Deleted copy assignment operator
+  MachineModuleInfo &operator=(MachineModuleInfo &MMI) = delete;
 
 public:
   explicit MachineModuleInfo(const LLVMTargetMachine *TM = nullptr);
 
   explicit MachineModuleInfo(const LLVMTargetMachine *TM,
                              MCContext *ExtContext);
 
-  MachineModuleInfo(MachineModuleInfo &&MMII);
-
   ~MachineModuleInfo();
 
   void initialize();
@@ -169,14 +171,11 @@ class MachineModuleInfo {
 }; // End class MachineModuleInfo
 
 class MachineModuleInfoWrapperPass : public ImmutablePass {
-  MachineModuleInfo MMI;
+  MachineModuleInfo &MMI;
 
 public:
   static char ID; // Pass identification, replacement for typeid
-  explicit MachineModuleInfoWrapperPass(const LLVMTargetMachine *TM = nullptr);
-
-  explicit MachineModuleInfoWrapperPass(const LLVMTargetMachine *TM,
-                                        MCContext *ExtContext);
+  explicit MachineModuleInfoWrapperPass(MachineModuleInfo &MMI);
 
   // Initialization and Finalization
   bool doInitialization(Module &) override;

llvm/lib/CodeGen/MachineModuleInfo.cpp

@@ -37,17 +37,6 @@ void MachineModuleInfo::finalize() {
   ObjFileMMI = nullptr;
 }
 
-MachineModuleInfo::MachineModuleInfo(MachineModuleInfo &&MMI)
-    : TM(std::move(MMI.TM)),
-      Context(TM.getTargetTriple(), TM.getMCAsmInfo(), TM.getMCRegisterInfo(),
-              TM.getMCSubtargetInfo(), nullptr, &TM.Options.MCOptions, false),
-      MachineFunctions(std::move(MMI.MachineFunctions)) {
-  Context.setObjectFileInfo(TM.getObjFileLowering());
-  ObjFileMMI = MMI.ObjFileMMI;
-  ExternalContext = MMI.ExternalContext;
-  TheModule = MMI.TheModule;
-}
-
 MachineModuleInfo::MachineModuleInfo(const LLVMTargetMachine *TM)
     : TM(*TM), Context(TM->getTargetTriple(), TM->getMCAsmInfo(),
                        TM->getMCRegisterInfo(), TM->getMCSubtargetInfo(),
@@ -151,14 +140,8 @@ FunctionPass *llvm::createFreeMachineFunctionPass() {
 }
 
 MachineModuleInfoWrapperPass::MachineModuleInfoWrapperPass(
-    const LLVMTargetMachine *TM)
-    : ImmutablePass(ID), MMI(TM) {
-  initializeMachineModuleInfoWrapperPassPass(*PassRegistry::getPassRegistry());
-}
-
-MachineModuleInfoWrapperPass::MachineModuleInfoWrapperPass(
-    const LLVMTargetMachine *TM, MCContext *ExtContext)
-    : ImmutablePass(ID), MMI(TM, ExtContext) {
+    MachineModuleInfo &MMI)
+    : ImmutablePass(ID), MMI(MMI) {
   initializeMachineModuleInfoWrapperPassPass(*PassRegistry::getPassRegistry());
 }