[clang] [compiler-rt] [clang-repl] Reimplement value printing using MemoryAccess to support in-process and out-of-process (PR #156649)

via llvm-commits llvm-commits at lists.llvm.org
Fri Sep 12 08:15:33 PDT 2025


https://github.com/SahilPatidar updated https://github.com/llvm/llvm-project/pull/156649

>From 4a56b9825b7dda9b729bd2a7790526a3a7d286c7 Mon Sep 17 00:00:00 2001
From: SahilPatidar <patidarsahil2001 at gmail.com>
Date: Tue, 2 Sep 2025 12:08:29 +0530
Subject: [PATCH 1/5] [clang-repl] Reimplement value printing using
 MemoryAccess to support in-process and out-of-process

---
 clang/include/clang/Interpreter/Interpreter.h |  10 +-
 clang/include/clang/Interpreter/Value.h       |  50 ++-
 clang/lib/Interpreter/Interpreter.cpp         |  16 +-
 .../Interpreter/InterpreterValuePrinter.cpp   | 397 ++++++----------
 clang/lib/Interpreter/Value.cpp               | 422 +++++++++++++++++-
 compiler-rt/lib/orc/CMakeLists.txt            |   1 +
 compiler-rt/lib/orc/send_value.cpp            |  27 ++
 7 files changed, 654 insertions(+), 269 deletions(-)
 create mode 100644 compiler-rt/lib/orc/send_value.cpp

diff --git a/clang/include/clang/Interpreter/Interpreter.h b/clang/include/clang/Interpreter/Interpreter.h
index 8c124aadf1005..6dd480118caa1 100644
--- a/clang/include/clang/Interpreter/Interpreter.h
+++ b/clang/include/clang/Interpreter/Interpreter.h
@@ -104,10 +104,7 @@ class Interpreter {
 
   unsigned InitPTUSize = 0;
 
-  // This member holds the last result of the value printing. It's a class
-  // member because we might want to access it after more inputs. If no value
-  // printing happens, it's in an invalid state.
-  Value LastValue;
+  std::unique_ptr<ValueResultManager> ValMgr;
 
   /// Compiler instance performing the incremental compilation.
   std::unique_ptr<CompilerInstance> CI;
@@ -148,7 +145,7 @@ class Interpreter {
 
   llvm::Expected<PartialTranslationUnit &> Parse(llvm::StringRef Code);
   llvm::Error Execute(PartialTranslationUnit &T);
-  llvm::Error ParseAndExecute(llvm::StringRef Code, Value *V = nullptr);
+  llvm::Error ParseAndExecute(llvm::StringRef Code);
 
   /// Undo N previous incremental inputs.
   llvm::Error Undo(unsigned N = 1);
@@ -187,9 +184,8 @@ class Interpreter {
   /// @{
 
   std::string ValueDataToString(const Value &V) const;
-  std::string ValueTypeToString(const Value &V) const;
 
-  llvm::Expected<Expr *> convertExprToValue(Expr *E);
+  llvm::Expected<Expr *> convertExprToValue(Expr *E, bool IsOOP = true);
 
   // When we deallocate clang::Value we need to run the destructor of the type.
   // This function forces emission of the needed dtor.
diff --git a/clang/include/clang/Interpreter/Value.h b/clang/include/clang/Interpreter/Value.h
index b91301e6096eb..b2e72261874f1 100644
--- a/clang/include/clang/Interpreter/Value.h
+++ b/clang/include/clang/Interpreter/Value.h
@@ -32,8 +32,11 @@
 
 #ifndef LLVM_CLANG_INTERPRETER_VALUE_H
 #define LLVM_CLANG_INTERPRETER_VALUE_H
-
+#include "llvm/ADT/FunctionExtras.h"
 #include "llvm/Config/llvm-config.h" // for LLVM_BUILD_LLVM_DYLIB, LLVM_BUILD_SHARED_LIBS
+#include "llvm/ExecutionEngine/Orc/LLJIT.h"
+#include "llvm/ExecutionEngine/Orc/MemoryAccess.h"
+#include "llvm/ExecutionEngine/Orc/Shared/ExecutorAddress.h"
 #include "llvm/Support/Compiler.h"
 #include <cassert>
 #include <cstdint>
@@ -107,7 +110,7 @@ class REPL_EXTERNAL_VISIBILITY Value {
     REPL_BUILTIN_TYPES
 #undef X
 
-    K_Void,
+        K_Void,
     K_PtrOrObj,
     K_Unspecified
   };
@@ -206,5 +209,48 @@ template <> inline void *Value::as() const {
     return Data.m_Ptr;
   return (void *)as<uintptr_t>();
 }
+
+class ValueBuffer {
+public:
+  QualType Ty;
+  virtual ~ValueBuffer() = default;
+  virtual std::string toString() const = 0;
+  virtual bool isValid() const = 0;
+};
+
+class ValueResultManager {
+public:
+  using ValueId = uint64_t;
+  using SendResultFn = llvm::unique_function<void(llvm::Error)>;
+
+  explicit ValueResultManager(ASTContext &Ctx, llvm::orc::MemoryAccess &MemAcc);
+
+  static std::unique_ptr<ValueResultManager>
+  Create(llvm::orc::LLJIT &EE, ASTContext &Ctx, bool IsOutOfProcess = true);
+
+  ValueId registerPendingResult(QualType QT) {
+    ValueId NewID = NextID.fetch_add(1, std::memory_order_relaxed);
+    IdToType.insert({NewID, QT});
+    return NewID;
+  }
+
+  void resetAndDump();
+
+  void deliverResult(SendResultFn SendResult, ValueId ID,
+                     llvm::orc::ExecutorAddr VAddr);
+
+private:
+  std::atomic<ValueId> NextID{1};
+  void Initialize(llvm::orc::LLJIT &EE);
+
+  std::string ValueTypeToString(QualType QT) const;
+
+  mutable std::mutex Mutex;
+  ASTContext &Ctx;
+  llvm::orc::MemoryAccess &MemAcc;
+  std::unique_ptr<ValueBuffer> ValBuf = nullptr;
+  llvm::DenseMap<ValueId, clang::QualType> IdToType;
+};
+
 } // namespace clang
 #endif
diff --git a/clang/lib/Interpreter/Interpreter.cpp b/clang/lib/Interpreter/Interpreter.cpp
index 47995216fac46..7915d005dc8f3 100644
--- a/clang/lib/Interpreter/Interpreter.cpp
+++ b/clang/lib/Interpreter/Interpreter.cpp
@@ -301,6 +301,9 @@ Interpreter::Interpreter(std::unique_ptr<CompilerInstance> Instance,
         return;
       }
   }
+
+  ValMgr = ValueResultManager::Create(IncrExecutor->GetExecutionEngine(),
+                                      getASTContext());
 }
 
 Interpreter::~Interpreter() {
@@ -323,6 +326,7 @@ Interpreter::~Interpreter() {
 // code them.
 const char *const Runtimes = R"(
     #define __CLANG_REPL__ 1
+
 #ifdef __cplusplus
     #define EXTERN_C extern "C"
     struct __clang_Interpreter_NewTag{} __ci_newtag;
@@ -343,6 +347,8 @@ const char *const Runtimes = R"(
       memcpy(Placement, Src, Size);
     }
 #endif // __cplusplus
+  EXTERN_C void __clang_Interpreter_SendResultValue(void *Ctx, unsigned long long, void*);
+  EXTERN_C void __orc_rt_SendResultValue(unsigned long long, void*);
   EXTERN_C void *__clang_Interpreter_SetValueWithAlloc(void*, void*, void*);
   EXTERN_C void __clang_Interpreter_SetValueNoAlloc(void *This, void *OutVal, void *OpaqueType, ...);
 )";
@@ -571,7 +577,7 @@ llvm::Error Interpreter::Execute(PartialTranslationUnit &T) {
   return llvm::Error::success();
 }
 
-llvm::Error Interpreter::ParseAndExecute(llvm::StringRef Code, Value *V) {
+llvm::Error Interpreter::ParseAndExecute(llvm::StringRef Code) {
 
   auto PTU = Parse(Code);
   if (!PTU)
@@ -580,12 +586,8 @@ llvm::Error Interpreter::ParseAndExecute(llvm::StringRef Code, Value *V) {
     if (llvm::Error Err = Execute(*PTU))
       return Err;
 
-  if (LastValue.isValid()) {
-    if (!V) {
-      LastValue.dump();
-      LastValue.clear();
-    } else
-      *V = std::move(LastValue);
+  if (ValMgr) {
+    ValMgr->resetAndDump();
   }
   return llvm::Error::success();
 }
diff --git a/clang/lib/Interpreter/InterpreterValuePrinter.cpp b/clang/lib/Interpreter/InterpreterValuePrinter.cpp
index 54abfa6dbb9d8..83064e022323f 100644
--- a/clang/lib/Interpreter/InterpreterValuePrinter.cpp
+++ b/clang/lib/Interpreter/InterpreterValuePrinter.cpp
@@ -337,11 +337,10 @@ std::string Interpreter::ValueDataToString(const Value &V) const {
   return "@" + VoidPtrToString(V.getPtr());
 }
 
-std::string Interpreter::ValueTypeToString(const Value &V) const {
-  ASTContext &Ctx = const_cast<ASTContext &>(V.getASTContext());
-  QualType QT = V.getType();
+std::string ValueResultManager::ValueTypeToString(QualType QT) const {
+  ASTContext &AstCtx = const_cast<ASTContext &>(Ctx);
 
-  std::string QTStr = QualTypeToString(Ctx, QT);
+  std::string QTStr = QualTypeToString(AstCtx, QT);
 
   if (QT->isReferenceType())
     QTStr += " &";
@@ -349,6 +348,32 @@ std::string Interpreter::ValueTypeToString(const Value &V) const {
   return QTStr;
 }
 
+void ValueResultManager::resetAndDump() {
+  if (!ValBuf)
+    return;
+
+  QualType Ty = ValBuf->Ty;
+
+  std::unique_ptr<ValueBuffer> Val = nullptr;
+  ValBuf.swap(Val);
+
+  // Don't even try to print a void or an invalid type, it doesn't make sense.
+  if (Ty->isVoidType() || !Val->isValid())
+    return;
+
+  // We need to get all the results together then print it, since `printType` is
+  // much faster than `printData`.
+  std::string Str;
+  llvm::raw_string_ostream SS(Str);
+
+  SS << "(";
+  SS << ValueTypeToString(Ty);
+  SS << ") ";
+  SS << Val->toString();
+  SS << "\n";
+  llvm::outs() << Str;
+}
+
 llvm::Expected<llvm::orc::ExecutorAddr>
 Interpreter::CompileDtorCall(CXXRecordDecl *CXXRD) const {
   assert(CXXRD && "Cannot compile a destructor for a nullptr");
@@ -371,99 +396,126 @@ Interpreter::CompileDtorCall(CXXRecordDecl *CXXRD) const {
   return AddrOrErr;
 }
 
-enum InterfaceKind { NoAlloc, WithAlloc, CopyArray, NewTag };
+class ExprConverter {
+  ASTContext &Ctx;
 
-class InterfaceKindVisitor
-    : public TypeVisitor<InterfaceKindVisitor, InterfaceKind> {
+public:
+  ExprConverter(ASTContext &Ctx) : Ctx(Ctx) {}
+
+  /// Create (&E) as a void*
+  ExprResult CreateAddressOfVoidPtrExpr(QualType Ty, Expr *ForCast) {
+    QualType VoidPtrTy = Ctx.getPointerType(Ctx.VoidTy);
+
+    // &E
+    Expr *AddrOf = UnaryOperator::Create(
+        Ctx, ForCast, UO_AddrOf, Ctx.getPointerType(Ty), VK_PRValue,
+        OK_Ordinary, SourceLocation(), false, FPOptionsOverride());
+
+    // static_cast<void*>(&E)
+    return CXXStaticCastExpr::Create(
+        Ctx, VoidPtrTy, VK_PRValue, CK_BitCast, AddrOf, nullptr,
+        Ctx.getTrivialTypeSourceInfo(VoidPtrTy), FPOptionsOverride(),
+        SourceLocation(), SourceLocation(), SourceRange());
+  }
 
-  Sema &S;
-  Expr *E;
-  llvm::SmallVectorImpl<Expr *> &Args;
+  /// Create a temporary VarDecl with initializer.
+  VarDecl *createTempVarDecl(QualType Ty, llvm::StringRef BaseName,
+                             Expr *Init) {
+    static unsigned Counter = 0;
+    IdentifierInfo &Id = Ctx.Idents.get((BaseName + Twine(++Counter)).str());
 
-public:
-  InterfaceKindVisitor(Sema &S, Expr *E, llvm::SmallVectorImpl<Expr *> &Args)
-      : S(S), E(E), Args(Args) {}
+    VarDecl *VD = VarDecl::Create(Ctx, Ctx.getTranslationUnitDecl(),
+                                  SourceLocation(), SourceLocation(), &Id, Ty,
+                                  Ctx.getTrivialTypeSourceInfo(Ty), SC_Auto);
 
-  InterfaceKind computeInterfaceKind(QualType Ty) {
-    return Visit(Ty.getTypePtr());
-  }
+    VD->setInit(Init);
+    VD->setInitStyle(VarDecl::CInit);
+    VD->markUsed(Ctx);
 
-  InterfaceKind VisitRecordType(const RecordType *Ty) {
-    return InterfaceKind::WithAlloc;
+    return VD;
   }
 
-  InterfaceKind VisitMemberPointerType(const MemberPointerType *Ty) {
-    return InterfaceKind::WithAlloc;
+  /// Wrap rvalues in a temporary so they become addressable.
+  Expr *CreateMaterializeTemporaryExpr(Expr *E) {
+    return new (Ctx) MaterializeTemporaryExpr(E->getType(), E,
+                                              /*BoundToLvalueReference=*/true);
   }
 
-  InterfaceKind VisitConstantArrayType(const ConstantArrayType *Ty) {
-    return InterfaceKind::CopyArray;
-  }
+  /// Generic helper: materialize if needed, then &expr as void*.
+  ExprResult makeAddressable(QualType QTy, Expr *E) {
+    if (E->isLValue() || E->isXValue())
+      return CreateAddressOfVoidPtrExpr(QTy, E);
 
-  InterfaceKind VisitFunctionType(const FunctionType *Ty) {
-    HandlePtrType(Ty);
-    return InterfaceKind::NoAlloc;
-  }
+    if (E->isPRValue())
+      return CreateAddressOfVoidPtrExpr(QTy, CreateMaterializeTemporaryExpr(E));
 
-  InterfaceKind VisitPointerType(const PointerType *Ty) {
-    HandlePtrType(Ty);
-    return InterfaceKind::NoAlloc;
+    return ExprError();
   }
 
-  InterfaceKind VisitReferenceType(const ReferenceType *Ty) {
-    ExprResult AddrOfE = S.CreateBuiltinUnaryOp(SourceLocation(), UO_AddrOf, E);
-    assert(!AddrOfE.isInvalid() && "Can not create unary expression");
-    Args.push_back(AddrOfE.get());
-    return InterfaceKind::NoAlloc;
+  ExprResult handleBuiltinTypeExpr(const BuiltinType *, QualType QTy, Expr *E) {
+    return makeAddressable(QTy, E);
   }
+  ExprResult handlePointerTypeExpr(const PointerType *, QualType QTy, Expr *E) {
+    return makeAddressable(QTy, E);
+  }
+  ExprResult handleArrayTypeExpr(const ConstantArrayType *, QualType QTy,
+                                 Expr *E) {
+    return makeAddressable(QTy, E);
+  }
+};
 
-  InterfaceKind VisitBuiltinType(const BuiltinType *Ty) {
-    if (Ty->isNullPtrType())
-      Args.push_back(E);
-    else if (Ty->isFloatingType())
+class InterfaceKindVisitor : public TypeVisitor<InterfaceKindVisitor, bool> {
+  Sema &S;
+  Expr *E;
+  llvm::SmallVectorImpl<Expr *> &Args;
+  ExprConverter Converter;
+
+public:
+  InterfaceKindVisitor(Sema &S, Expr *E, llvm::SmallVectorImpl<Expr *> &Args)
+      : S(S), E(E), Args(Args), Converter(S.getASTContext()) {}
+
+  bool transformExpr(QualType Ty) { return Visit(Ty.getTypePtr()); }
+
+  bool VisitBuiltinType(const BuiltinType *Ty) {
+    if (Ty->isNullPtrType()) {
       Args.push_back(E);
-    else if (Ty->isIntegralOrEnumerationType())
-      HandleIntegralOrEnumType(Ty);
-    else if (Ty->isVoidType()) {
-      // Do we need to still run `E`?
+    } else if (Ty->isFloatingType() || Ty->isIntegralOrEnumerationType()) {
+      Args.push_back(
+          Converter.handleBuiltinTypeExpr(Ty, QualType(Ty, 0), E).get());
+    } else if (Ty->isVoidType()) {
+      return false;
     }
-
-    return InterfaceKind::NoAlloc;
+    return true;
   }
 
-  InterfaceKind VisitEnumType(const EnumType *Ty) {
-    HandleIntegralOrEnumType(Ty);
-    return InterfaceKind::NoAlloc;
+  bool VisitPointerType(const PointerType *Ty) {
+    Args.push_back(
+        Converter.handlePointerTypeExpr(Ty, QualType(Ty, 0), E).get());
+    return true;
   }
 
-private:
-  // Force cast these types to the uint that fits the register size. That way we
-  // reduce the number of overloads of `__clang_Interpreter_SetValueNoAlloc`.
-  void HandleIntegralOrEnumType(const Type *Ty) {
-    ASTContext &Ctx = S.getASTContext();
-    uint64_t PtrBits = Ctx.getTypeSize(Ctx.VoidPtrTy);
-    QualType UIntTy = Ctx.getBitIntType(/*Unsigned=*/true, PtrBits);
-    TypeSourceInfo *TSI = Ctx.getTrivialTypeSourceInfo(UIntTy);
-    ExprResult CastedExpr =
-        S.BuildCStyleCastExpr(SourceLocation(), TSI, SourceLocation(), E);
-    assert(!CastedExpr.isInvalid() && "Cannot create cstyle cast expr");
-    Args.push_back(CastedExpr.get());
+  bool VisitConstantArrayType(const ConstantArrayType *Ty) {
+    Args.push_back(Converter.handleArrayTypeExpr(Ty, QualType(Ty, 0), E).get());
+    return true;
   }
 
-  void HandlePtrType(const Type *Ty) {
-    ASTContext &Ctx = S.getASTContext();
-    TypeSourceInfo *TSI = Ctx.getTrivialTypeSourceInfo(Ctx.VoidPtrTy);
-    ExprResult CastedExpr =
-        S.BuildCStyleCastExpr(SourceLocation(), TSI, SourceLocation(), E);
-    assert(!CastedExpr.isInvalid() && "Can not create cstyle cast expression");
-    Args.push_back(CastedExpr.get());
+  bool VisitReferenceType(const ReferenceType *Ty) {
+    ExprResult AddrOfE = S.CreateBuiltinUnaryOp(SourceLocation(), UO_AddrOf, E);
+    assert(!AddrOfE.isInvalid() && "Cannot create unary expression");
+    Args.push_back(AddrOfE.get());
+    return true;
   }
+
+  bool VisitRecordType(const RecordType *) { return true; }
+  bool VisitMemberPointerType(const MemberPointerType *) { return true; }
+  bool VisitFunctionType(const FunctionType *) { return true; }
+  bool VisitEnumType(const EnumType *) { return true; }
 };
 
-static constexpr llvm::StringRef VPName[] = {
-    "__clang_Interpreter_SetValueNoAlloc",
-    "__clang_Interpreter_SetValueWithAlloc",
-    "__clang_Interpreter_SetValueCopyArr", "__ci_newtag"};
+enum RunTimeFnTag { OrcSendResult, ClangSendResult };
+
+static constexpr llvm::StringRef RunTimeFnTagName[] = {
+    "__orc_rt_SendResultValue", "__clang_Interpreter_SendResultValue"};
 
 // This synthesizes a call expression to a speciall
 // function that is responsible for generating the Value.
@@ -478,7 +530,7 @@ static constexpr llvm::StringRef VPName[] = {
 //   // 3. If x is a struct, but a rvalue.
 //   new (__clang_Interpreter_SetValueWithAlloc(ThisInterp, OpaqueValue,
 //   xQualType)) (x);
-llvm::Expected<Expr *> Interpreter::convertExprToValue(Expr *E) {
+llvm::Expected<Expr *> Interpreter::convertExprToValue(Expr *E, bool isOOP) {
   Sema &S = getCompilerInstance()->getSema();
   ASTContext &Ctx = S.getASTContext();
 
@@ -500,34 +552,22 @@ llvm::Expected<Expr *> Interpreter::convertExprToValue(Expr *E) {
       Interface = S.BuildDeclarationNameExpr(CSS, R, /*ADL=*/false).get();
       return llvm::Error::success();
     };
-    if (llvm::Error Err =
-            LookupInterface(ValuePrintingInfo[NoAlloc], VPName[NoAlloc]))
-      return std::move(Err);
 
-    if (llvm::Error Err =
-            LookupInterface(ValuePrintingInfo[CopyArray], VPName[CopyArray]))
+    if (llvm::Error Err = LookupInterface(ValuePrintingInfo[OrcSendResult],
+                                          RunTimeFnTagName[OrcSendResult]))
       return std::move(Err);
 
-    if (llvm::Error Err =
-            LookupInterface(ValuePrintingInfo[WithAlloc], VPName[WithAlloc]))
+    if (llvm::Error Err = LookupInterface(ValuePrintingInfo[ClangSendResult],
+                                          RunTimeFnTagName[ClangSendResult]))
       return std::move(Err);
-
-    if (Ctx.getLangOpts().CPlusPlus) {
-      if (llvm::Error Err =
-              LookupInterface(ValuePrintingInfo[NewTag], VPName[NewTag]))
-        return std::move(Err);
-    }
   }
 
   llvm::SmallVector<Expr *, 4> AdjustedArgs;
-  // Create parameter `ThisInterp`.
-  AdjustedArgs.push_back(CStyleCastPtrExpr(S, Ctx.VoidPtrTy, (uintptr_t)this));
-
-  // Create parameter `OutVal`.
-  AdjustedArgs.push_back(
-      CStyleCastPtrExpr(S, Ctx.VoidPtrTy, (uintptr_t)&LastValue));
 
-  // Build `__clang_Interpreter_SetValue*` call.
+  if (!isOOP)
+    // Create parameter `ValMgr`.
+    AdjustedArgs.push_back(
+        CStyleCastPtrExpr(S, Ctx.VoidPtrTy, (uintptr_t)ValMgr.get()));
 
   // Get rid of ExprWithCleanups.
   if (auto *EWC = llvm::dyn_cast_if_present<ExprWithCleanups>(E))
@@ -542,87 +582,22 @@ llvm::Expected<Expr *> Interpreter::convertExprToValue(Expr *E) {
     Ty = Ctx.getLValueReferenceType(Ty);
   }
 
-  Expr *TypeArg =
-      CStyleCastPtrExpr(S, Ctx.VoidPtrTy, (uintptr_t)Ty.getAsOpaquePtr());
-  // The QualType parameter `OpaqueType`, represented as `void*`.
-  AdjustedArgs.push_back(TypeArg);
+  auto ID = ValMgr->registerPendingResult(Ty);
+
+  AdjustedArgs.push_back(IntegerLiteralExpr(Ctx, ID));
 
   // We push the last parameter based on the type of the Expr. Note we need
   // special care for rvalue struct.
   InterfaceKindVisitor V(S, E, AdjustedArgs);
-  Scope *Scope = nullptr;
   ExprResult SetValueE;
-  InterfaceKind Kind = V.computeInterfaceKind(DesugaredTy);
-  switch (Kind) {
-  case InterfaceKind::WithAlloc:
-    LLVM_FALLTHROUGH;
-  case InterfaceKind::CopyArray: {
-    // __clang_Interpreter_SetValueWithAlloc.
-    ExprResult AllocCall =
-        S.ActOnCallExpr(Scope, ValuePrintingInfo[InterfaceKind::WithAlloc],
-                        E->getBeginLoc(), AdjustedArgs, E->getEndLoc());
-    if (AllocCall.isInvalid())
-      return llvm::make_error<llvm::StringError>(
-          "Cannot call to " + VPName[WithAlloc],
-          llvm::inconvertibleErrorCode());
-
-    TypeSourceInfo *TSI = Ctx.getTrivialTypeSourceInfo(Ty, SourceLocation());
-
-    // Force CodeGen to emit destructor.
-    if (auto *RD = Ty->getAsCXXRecordDecl()) {
-      auto *Dtor = S.LookupDestructor(RD);
-      Dtor->addAttr(UsedAttr::CreateImplicit(Ctx));
-      getCompilerInstance()->getASTConsumer().HandleTopLevelDecl(
-          DeclGroupRef(Dtor));
-    }
+  Scope *Scope = nullptr;
+  if (!V.transformExpr(DesugaredTy))
+    return E;
 
-    // __clang_Interpreter_SetValueCopyArr.
-    if (Kind == InterfaceKind::CopyArray) {
-      const auto *CATy = cast<ConstantArrayType>(DesugaredTy.getTypePtr());
-      size_t ArrSize = Ctx.getConstantArrayElementCount(CATy);
-
-      if (!Ctx.getLangOpts().CPlusPlus)
-        ArrSize *= Ctx.getTypeSizeInChars(CATy->getBaseElementTypeUnsafe())
-                       .getQuantity();
-
-      Expr *ArrSizeExpr = IntegerLiteralExpr(Ctx, ArrSize);
-      Expr *Args[] = {E, AllocCall.get(), ArrSizeExpr};
-      SetValueE =
-          S.ActOnCallExpr(Scope, ValuePrintingInfo[InterfaceKind::CopyArray],
-                          SourceLocation(), Args, SourceLocation());
-      if (SetValueE.isInvalid())
-        return llvm::make_error<llvm::StringError>(
-            "Cannot call to " + VPName[CopyArray],
-            llvm::inconvertibleErrorCode());
-      break;
-    }
-    Expr *Args[] = {AllocCall.get(), ValuePrintingInfo[InterfaceKind::NewTag]};
-    ExprResult CXXNewCall = S.BuildCXXNew(
-        E->getSourceRange(),
-        /*UseGlobal=*/true, /*PlacementLParen=*/SourceLocation(), Args,
-        /*PlacementRParen=*/SourceLocation(),
-        /*TypeIdParens=*/SourceRange(), TSI->getType(), TSI, std::nullopt,
-        E->getSourceRange(), E);
-
-    if (CXXNewCall.isInvalid())
-      return llvm::make_error<llvm::StringError>(
-          "Cannot build a call to placement new",
-          llvm::inconvertibleErrorCode());
-
-    SetValueE = S.ActOnFinishFullExpr(CXXNewCall.get(),
-                                      /*DiscardedValue=*/false);
-    break;
-  }
-  // __clang_Interpreter_SetValueNoAlloc.
-  case InterfaceKind::NoAlloc: {
-    SetValueE =
-        S.ActOnCallExpr(Scope, ValuePrintingInfo[InterfaceKind::NoAlloc],
-                        E->getBeginLoc(), AdjustedArgs, E->getEndLoc());
-    break;
-  }
-  default:
-    llvm_unreachable("Unhandled InterfaceKind");
-  }
+  RunTimeFnTag Tag =
+      isOOP ? RunTimeFnTag::OrcSendResult : RunTimeFnTag::ClangSendResult;
+  SetValueE = S.ActOnCallExpr(Scope, ValuePrintingInfo[Tag], E->getBeginLoc(),
+                              AdjustedArgs, E->getEndLoc());
 
   // It could fail, like printing an array type in C. (not supported)
   if (SetValueE.isInvalid())
@@ -630,97 +605,17 @@ llvm::Expected<Expr *> Interpreter::convertExprToValue(Expr *E) {
 
   return SetValueE.get();
 }
-
 } // namespace clang
 
 using namespace clang;
 
 // Temporary rvalue struct that need special care.
 extern "C" {
-REPL_EXTERNAL_VISIBILITY void *
-__clang_Interpreter_SetValueWithAlloc(void *This, void *OutVal,
-                                      void *OpaqueType) {
-  Value &VRef = *(Value *)OutVal;
-  VRef = Value(static_cast<Interpreter *>(This), OpaqueType);
-  return VRef.getPtr();
-}
-
 REPL_EXTERNAL_VISIBILITY void
-__clang_Interpreter_SetValueNoAlloc(void *This, void *OutVal, void *OpaqueType,
-                                    ...) {
-  Value &VRef = *(Value *)OutVal;
-  Interpreter *I = static_cast<Interpreter *>(This);
-  VRef = Value(I, OpaqueType);
-  if (VRef.isVoid())
-    return;
-
-  va_list args;
-  va_start(args, /*last named param*/ OpaqueType);
-
-  QualType QT = VRef.getType();
-  if (VRef.getKind() == Value::K_PtrOrObj) {
-    VRef.setPtr(va_arg(args, void *));
-  } else {
-    if (const auto *ED = QT->getAsEnumDecl())
-      QT = ED->getIntegerType();
-    switch (QT->castAs<BuiltinType>()->getKind()) {
-    default:
-      llvm_unreachable("unknown type kind!");
-      break;
-      // Types shorter than int are resolved as int, else va_arg has UB.
-    case BuiltinType::Bool:
-      VRef.setBool(va_arg(args, int));
-      break;
-    case BuiltinType::Char_S:
-      VRef.setChar_S(va_arg(args, int));
-      break;
-    case BuiltinType::SChar:
-      VRef.setSChar(va_arg(args, int));
-      break;
-    case BuiltinType::Char_U:
-      VRef.setChar_U(va_arg(args, unsigned));
-      break;
-    case BuiltinType::UChar:
-      VRef.setUChar(va_arg(args, unsigned));
-      break;
-    case BuiltinType::Short:
-      VRef.setShort(va_arg(args, int));
-      break;
-    case BuiltinType::UShort:
-      VRef.setUShort(va_arg(args, unsigned));
-      break;
-    case BuiltinType::Int:
-      VRef.setInt(va_arg(args, int));
-      break;
-    case BuiltinType::UInt:
-      VRef.setUInt(va_arg(args, unsigned));
-      break;
-    case BuiltinType::Long:
-      VRef.setLong(va_arg(args, long));
-      break;
-    case BuiltinType::ULong:
-      VRef.setULong(va_arg(args, unsigned long));
-      break;
-    case BuiltinType::LongLong:
-      VRef.setLongLong(va_arg(args, long long));
-      break;
-    case BuiltinType::ULongLong:
-      VRef.setULongLong(va_arg(args, unsigned long long));
-      break;
-      // Types shorter than double are resolved as double, else va_arg has UB.
-    case BuiltinType::Float:
-      VRef.setFloat(va_arg(args, double));
-      break;
-    case BuiltinType::Double:
-      VRef.setDouble(va_arg(args, double));
-      break;
-    case BuiltinType::LongDouble:
-      VRef.setLongDouble(va_arg(args, long double));
-      break;
-      // See REPL_BUILTIN_TYPES.
-    }
-  }
-  va_end(args);
+__clang_Interpreter_SendResultValue(void *Ctx, uint64_t Id, void *Addr) {
+  static_cast<ValueResultManager *>(Ctx)->deliverResult(
+      [](llvm::Error Err) { llvm::cantFail(std::move(Err)); }, Id,
+      llvm::orc::ExecutorAddr::fromPtr(Addr));
 }
 }
 
diff --git a/clang/lib/Interpreter/Value.cpp b/clang/lib/Interpreter/Value.cpp
index d4c9d51ffcb61..8136dee622c96 100644
--- a/clang/lib/Interpreter/Value.cpp
+++ b/clang/lib/Interpreter/Value.cpp
@@ -11,12 +11,27 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Interpreter/Value.h"
+#include "clang/AST/Type.h"
+
 #include "InterpreterUtils.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/Type.h"
 #include "clang/Interpreter/Interpreter.h"
+#include "clang/Interpreter/Value.h"
 #include "llvm/ADT/StringExtras.h"
+
+#include "llvm/ExecutionEngine/Orc/Core.h"
+#include "llvm/ExecutionEngine/Orc/ExecutorProcessControl.h"
+#include "llvm/ExecutionEngine/Orc/LLJIT.h"
+#include "llvm/ExecutionEngine/Orc/SelfExecutorProcessControl.h"
+#include "llvm/ExecutionEngine/Orc/Shared/ExecutorAddress.h"
+#include "llvm/ExecutionEngine/Orc/Shared/OrcRTBridge.h"
+
+#include <atomic>
+#include <future>
+#include <mutex>
+#include <unordered_map>
+
 #include <cassert>
 #include <utility>
 
@@ -251,7 +266,7 @@ const ASTContext &Value::getASTContext() const {
 void Value::dump() const { print(llvm::outs()); }
 
 void Value::printType(llvm::raw_ostream &Out) const {
-  Out << Interp->ValueTypeToString(*this);
+  // Out << Interp->ValueTypeToString(*this);
 }
 
 void Value::printData(llvm::raw_ostream &Out) const {
@@ -279,4 +294,407 @@ void Value::print(llvm::raw_ostream &Out) const {
   Out << Str;
 }
 
+class BuiltinValueBuffer : public ValueBuffer {
+public:
+  std::vector<char> raw;
+  BuiltinValueBuffer(QualType _Ty) { Ty = _Ty; }
+  template <typename T> T as() const {
+    T v{};
+    assert(raw.size() >= sizeof(T) && "Buffer too small for type!");
+    memcpy(&v, raw.data(), sizeof(T));
+    return v;
+  }
+  std::string toString() const override {
+    if (Ty->isCharType()) {
+      unsigned char c = as<unsigned char>();
+      switch (c) {
+      case '\n':
+        return "'\\n'";
+      case '\t':
+        return "'\\t'";
+      case '\r':
+        return "'\\r'";
+      case '\'':
+        return "'\\''";
+      case '\\':
+        return "'\\'";
+      default:
+        if (std::isprint(c))
+          return std::string("'") + static_cast<char>(c) + "'";
+        else {
+          return llvm::formatv("'\\x{0:02X}'", c).str();
+        }
+      }
+    }
+    if (auto *BT = Ty.getCanonicalType()->getAs<BuiltinType>()) {
+
+      auto formatFloating = [](auto Val, char Suffix = '\0') -> std::string {
+        std::string Out;
+        llvm::raw_string_ostream SS(Out);
+
+        if (std::isnan(Val) || std::isinf(Val)) {
+          SS << llvm::format("%g", Val);
+          return SS.str();
+        }
+        if (Val == static_cast<decltype(Val)>(static_cast<int64_t>(Val)))
+          SS << llvm::format("%.1f", Val);
+        else if (std::abs(Val) < 1e-4 || std::abs(Val) > 1e6 || Suffix == 'f')
+          SS << llvm::format("%#.6g", Val);
+        else if (Suffix == 'L')
+          SS << llvm::format("%#.12Lg", Val);
+        else
+          SS << llvm::format("%#.8g", Val);
+
+        if (Suffix != '\0')
+          SS << Suffix;
+        return SS.str();
+      };
+
+      std::string Str;
+      llvm::raw_string_ostream SS(Str);
+      switch (BT->getKind()) {
+      default:
+        return "{ error: unknown builtin type '" +
+               std::to_string(BT->getKind()) + " '}";
+      case clang::BuiltinType::Bool:
+        SS << ((as<bool>()) ? "true" : "false");
+        return Str;
+      case clang::BuiltinType::Short:
+        SS << as<short>();
+        return Str;
+      case clang::BuiltinType::UShort:
+        SS << as<unsigned short>();
+        return Str;
+      case clang::BuiltinType::Int:
+        SS << as<int>();
+        return Str;
+      case clang::BuiltinType::UInt:
+        SS << as<unsigned int>();
+        return Str;
+      case clang::BuiltinType::Long:
+        SS << as<long>();
+        return Str;
+      case clang::BuiltinType::ULong:
+        SS << as<unsigned long>();
+        return Str;
+      case clang::BuiltinType::LongLong:
+        SS << as<long long>();
+        return Str;
+      case clang::BuiltinType::ULongLong:
+        SS << as<unsigned long long>();
+        return Str;
+      case clang::BuiltinType::Float:
+        return formatFloating(as<float>(), /*suffix=*/'f');
+
+      case clang::BuiltinType::Double:
+        return formatFloating(as<double>());
+
+      case clang::BuiltinType::LongDouble:
+        return formatFloating(as<long double>(), /*suffix=*/'L');
+      }
+    }
+
+    return "";
+  }
+
+  bool isValid() const override { return !raw.empty(); }
+};
+
+class ArrayValueBuffer : public ValueBuffer {
+public:
+  std::vector<std::unique_ptr<ValueBuffer>> Elements;
+  ArrayValueBuffer(QualType EleTy) { Ty = EleTy; }
+  std::string toString() const override {
+    std::ostringstream OS;
+    OS << "{";
+    for (size_t i = 0; i < Elements.size(); ++i) {
+      OS << Elements[i]->toString();
+      if (i + 1 < Elements.size())
+        OS << ",";
+    }
+    OS << "}";
+    return OS.str();
+  }
+
+  bool isValid() const override { return !Elements.empty(); }
+};
+
+static std::string escapeString(const std::vector<char> &Raw) {
+  std::string Out;
+  for (char c : Raw) {
+    switch (c) {
+    case '\n':
+      Out += "\\n";
+      break;
+    case '\t':
+      Out += "\\t";
+      break;
+    case '\r':
+      Out += "\\r";
+      break;
+    case '\"':
+      Out += "\\\"";
+      break;
+    case '\\':
+      Out += "\\\\";
+      break;
+    default:
+      if (std::isprint(static_cast<unsigned char>(c)))
+        Out.push_back(c);
+      else {
+        char buf[5];
+        snprintf(buf, sizeof(buf), "\\x%02X", static_cast<unsigned char>(c));
+        Out += buf;
+      }
+      break;
+    }
+  }
+  return Out;
+}
+
+class PointerValueBuffer : public ValueBuffer {
+public:
+  uint64_t Address = 0;
+  std::unique_ptr<ValueBuffer> Pointee; // optional, used only for char*
+
+  PointerValueBuffer(QualType _Ty, uint64_t Addr = 0) : Address(Addr) {
+    Ty = _Ty;
+  }
+
+  std::string toString() const override {
+    auto PtrTy = dyn_cast<PointerType>(Ty.getTypePtr());
+    if (!PtrTy)
+      return "";
+
+    auto PointeeTy = PtrTy->getPointeeType();
+
+    // char* -> print string literal
+    if (PointeeTy->isCharType() && Pointee) {
+      if (auto *BE = static_cast<BuiltinValueBuffer *>(Pointee.get()))
+        return "\"" + escapeString(BE->raw) + "\"";
+    }
+
+    if (Address == 0)
+      return "nullptr";
+
+    std::ostringstream OS;
+    OS << "0x" << std::hex << Address;
+    return OS.str();
+  }
+
+  bool isValid() const override { return Address != 0; }
+};
+
+class ReaderDispatcher {
+private:
+  ASTContext &Ctx;
+  llvm::orc::MemoryAccess &MA;
+
+public:
+  ReaderDispatcher(ASTContext &Ctx, llvm::orc::MemoryAccess &MA)
+      : Ctx(Ctx), MA(MA) {}
+
+  llvm::Expected<std::unique_ptr<ValueBuffer>>
+  read(QualType QT, llvm::orc::ExecutorAddr Addr);
+
+  llvm::Expected<std::unique_ptr<ValueBuffer>>
+  readBuiltin(QualType Ty, llvm::orc::ExecutorAddr Addr);
+
+  llvm::Expected<std::unique_ptr<ValueBuffer>>
+  readPointer(QualType Ty, llvm::orc::ExecutorAddr Addr);
+
+  llvm::Expected<std::unique_ptr<ValueBuffer>>
+  readArray(QualType Ty, llvm::orc::ExecutorAddr Addr);
+
+  // TODO: record, function, etc.
+};
+
+class TypeReadVisitor
+    : public TypeVisitor<TypeReadVisitor,
+                         llvm::Expected<std::unique_ptr<ValueBuffer>>> {
+  ReaderDispatcher &Dispatcher;
+  llvm::orc::ExecutorAddr Addr;
+
+public:
+  TypeReadVisitor(ReaderDispatcher &D, llvm::orc::ExecutorAddr A)
+      : Dispatcher(D), Addr(A) {}
+
+  llvm::Expected<std::unique_ptr<ValueBuffer>> VisitType(const Type *T) {
+    return llvm::make_error<llvm::StringError>(
+        "Unsupported type in ReaderDispatcher", llvm::inconvertibleErrorCode());
+  }
+
+  llvm::Expected<std::unique_ptr<ValueBuffer>>
+  VisitBuiltinType(const BuiltinType *BT) {
+    return Dispatcher.readBuiltin(QualType(BT, 0), Addr);
+  }
+
+  llvm::Expected<std::unique_ptr<ValueBuffer>>
+  VisitPointerType(const PointerType *PT) {
+    return Dispatcher.readPointer(QualType(PT, 0), Addr);
+  }
+
+  llvm::Expected<std::unique_ptr<ValueBuffer>>
+  VisitConstantArrayType(const ConstantArrayType *AT) {
+    return Dispatcher.readArray(QualType(AT, 0), Addr);
+  }
+
+  llvm::Expected<std::unique_ptr<ValueBuffer>>
+  VisitRecordType(const RecordType *RT) {
+    return llvm::make_error<llvm::StringError>(
+        "RecordType reading not yet implemented",
+        llvm::inconvertibleErrorCode());
+  }
+};
+
+llvm::Expected<std::unique_ptr<ValueBuffer>>
+ReaderDispatcher::read(QualType QT, llvm::orc::ExecutorAddr Addr) {
+  TypeReadVisitor V(*this, Addr);
+  return V.Visit(QT.getTypePtr());
+}
+
+llvm::Expected<std::unique_ptr<ValueBuffer>>
+ReaderDispatcher::readBuiltin(QualType Ty, llvm::orc::ExecutorAddr Addr) {
+  auto Size = Ctx.getTypeSizeInChars(Ty).getQuantity();
+  auto ResOrErr = MA.readBuffers({llvm::orc::ExecutorAddrRange(Addr, Size)});
+  if (!ResOrErr)
+    return ResOrErr.takeError();
+
+  auto Buf = std::make_unique<BuiltinValueBuffer>(Ty);
+  const auto &Res = *ResOrErr;
+  std::vector<char> ElemBuf(Size);
+  std::memcpy(ElemBuf.data(), Res.back().data(), Size);
+  Buf->raw = std::move(ElemBuf);
+  return std::move(Buf);
+}
+
+llvm::Expected<std::unique_ptr<ValueBuffer>>
+ReaderDispatcher::readArray(QualType Ty, llvm::orc::ExecutorAddr Addr) {
+  const ConstantArrayType *CAT = Ctx.getAsConstantArrayType(Ty);
+  if (!CAT)
+    return llvm::make_error<llvm::StringError>("Not a ConstantArrayType",
+                                               llvm::inconvertibleErrorCode());
+
+  QualType ElemTy = CAT->getElementType();
+  size_t ElemSize = Ctx.getTypeSizeInChars(ElemTy).getQuantity();
+
+  auto Buf = std::make_unique<ArrayValueBuffer>(Ty);
+
+  for (size_t i = 0; i < CAT->getZExtSize(); ++i) {
+    auto ElemAddr = Addr + i * ElemSize;
+    auto ElemBufOrErr = read(ElemTy, ElemAddr);
+    if (!ElemBufOrErr)
+      return ElemBufOrErr.takeError();
+    Buf->Elements.push_back(std::move(*ElemBufOrErr));
+  }
+
+  return std::move(Buf);
+}
+
+llvm::Expected<std::unique_ptr<ValueBuffer>>
+ReaderDispatcher::ReaderDispatcher::readPointer(QualType Ty,
+                                                llvm::orc::ExecutorAddr Addr) {
+  auto PtrTy = dyn_cast<PointerType>(Ty.getTypePtr());
+  if (!PtrTy)
+    return llvm::make_error<llvm::StringError>("Not a PointerType",
+                                               llvm::inconvertibleErrorCode());
+
+  auto AddrOrErr = MA.readUInt64s({Addr});
+  if (!AddrOrErr)
+    return AddrOrErr.takeError();
+
+  uint64_t PtrValAddr = AddrOrErr->back();
+  if (PtrValAddr == 0)
+    return std::make_unique<PointerValueBuffer>(Ty); // null pointer
+
+  llvm::orc::ExecutorAddr PointeeAddr(PtrValAddr);
+  auto PtrBuf = std::make_unique<PointerValueBuffer>(Ty, PtrValAddr);
+
+  QualType PointeeTy = PtrTy->getPointeeType();
+  if (PointeeTy->isCharType()) {
+    std::string S;
+    for (size_t i = 0; i < 1024; ++i) {
+      auto CRes = MA.readUInt8s({PointeeAddr + i});
+      if (!CRes)
+        return CRes.takeError();
+      char c = static_cast<char>(CRes->back());
+      if (c == '\0')
+        break;
+      S.push_back(c);
+    }
+    auto Buf = std::make_unique<BuiltinValueBuffer>(PointeeTy);
+    Buf->raw.assign(S.begin(), S.end());
+    PtrBuf->Pointee = std::move(Buf);
+  }
+  // else {
+  //   auto BufOrErr = read(PointeeTy, PointeeAddr);
+  //   if (!BufOrErr)
+  //     return BufOrErr.takeError();
+  //   PtrBuf->Pointee = std::move(*BufOrErr);
+  // }
+  return std::move(PtrBuf);
+}
+
+ValueResultManager::ValueResultManager(ASTContext &Ctx,
+                                       llvm::orc::MemoryAccess &MA)
+    : Ctx(Ctx), MemAcc(MA) {}
+
+std::unique_ptr<ValueResultManager>
+ValueResultManager::Create(llvm::orc::LLJIT &EE, ASTContext &Ctx, bool IsOop) {
+  auto &ES = EE.getExecutionSession();
+  auto &EPC = ES.getExecutorProcessControl();
+  auto VRMgr = std::make_unique<ValueResultManager>(Ctx, EPC.getMemoryAccess());
+  if (IsOop)
+    VRMgr->Initialize(EE);
+  return VRMgr;
+}
+
+void ValueResultManager::Initialize(llvm::orc::LLJIT &EE) {
+  auto &ES = EE.getExecutionSession();
+
+  llvm::orc::ExecutionSession::JITDispatchHandlerAssociationMap Handlers;
+  using OrcSendResultFn =
+      llvm::orc::shared::SPSError(uint64_t, llvm::orc::shared::SPSExecutorAddr);
+
+  const char *SendValFnTag = "___orc_rt_SendResultValue_tag";
+#ifndef __APPLE__
+  ++SendValFnTag;
+#endif
+  Handlers[ES.intern(SendValFnTag)] = ES.wrapAsyncWithSPS<OrcSendResultFn>(
+      this, &ValueResultManager::deliverResult);
+
+  llvm::cantFail(ES.registerJITDispatchHandlers(*EE.getPlatformJITDylib(),
+                                                std::move(Handlers)));
+}
+
+void ValueResultManager::deliverResult(SendResultFn SendResult, ValueId ID,
+                                       llvm::orc::ExecutorAddr Addr) {
+  QualType Ty;
+
+  {
+    std::lock_guard<std::mutex> Lock(Mutex);
+    auto It = IdToType.find(ID);
+    if (It == IdToType.end()) {
+      SendResult(llvm::make_error<llvm::StringError>(
+          "Unknown ValueId in deliverResult", llvm::inconvertibleErrorCode()));
+    }
+    Ty = It->second;
+    IdToType.erase(It);
+  }
+
+  ReaderDispatcher Runner(Ctx, MemAcc);
+  auto BufOrErr = Runner.read(Ty, Addr);
+
+  ValBuf.reset();
+  if (!BufOrErr) {
+    SendResult(BufOrErr.takeError());
+    return;
+  }
+
+  // Store the successfully read value buffer
+  ValBuf.swap(*BufOrErr);
+
+  SendResult(llvm::Error::success());
+  return;
+}
 } // namespace clang
diff --git a/compiler-rt/lib/orc/CMakeLists.txt b/compiler-rt/lib/orc/CMakeLists.txt
index b8d1b03b788c9..1addf77794a94 100644
--- a/compiler-rt/lib/orc/CMakeLists.txt
+++ b/compiler-rt/lib/orc/CMakeLists.txt
@@ -8,6 +8,7 @@ set(ORC_COMMON_SOURCES
   log_error_to_stderr.cpp
   run_program_wrapper.cpp
   resolve.cpp
+  send_value.cpp
   )
 
 # Common implementation headers will go here.
diff --git a/compiler-rt/lib/orc/send_value.cpp b/compiler-rt/lib/orc/send_value.cpp
new file mode 100644
index 0000000000000..31834439e6895
--- /dev/null
+++ b/compiler-rt/lib/orc/send_value.cpp
@@ -0,0 +1,27 @@
+//===- send_value.cpp ----------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "common.h"
+#include "jit_dispatch.h"
+#include "wrapper_function_utils.h"
+#include "debug.h"
+
+using namespace orc_rt;
+
+ORC_RT_JIT_DISPATCH_TAG(__orc_rt_SendResultValue_tag)
+
+ORC_RT_INTERFACE void __orc_rt_SendResultValue(uint64_t ResultId, void *V) {
+  Error OptErr = Error::success();
+  if (auto Err = WrapperFunction<SPSError(uint64_t, SPSExecutorAddr)>::call(
+          JITDispatch(&__orc_rt_SendResultValue_tag), OptErr, ResultId,
+          ExecutorAddr::fromPtr(V))) {
+    cantFail(std::move(OptErr));
+    cantFail(std::move(Err));
+  }
+  consumeError(std::move(OptErr));
+}

>From ab676fd6002cd6a95cb3bbb45aa459dc80609d87 Mon Sep 17 00:00:00 2001
From: SahilPatidar <patidarsahil2001 at gmail.com>
Date: Wed, 3 Sep 2025 17:11:34 +0530
Subject: [PATCH 2/5] Fix issues and add ValueToString helper

---
 clang/include/clang/Interpreter/Interpreter.h |   2 +-
 clang/include/clang/Interpreter/Value.h       |  64 +++-
 .../Interpreter/InterpreterValuePrinter.cpp   | 285 +++++++++++-------
 clang/lib/Interpreter/Value.cpp               | 218 ++------------
 4 files changed, 251 insertions(+), 318 deletions(-)

diff --git a/clang/include/clang/Interpreter/Interpreter.h b/clang/include/clang/Interpreter/Interpreter.h
index 6dd480118caa1..c1e7ca48c0961 100644
--- a/clang/include/clang/Interpreter/Interpreter.h
+++ b/clang/include/clang/Interpreter/Interpreter.h
@@ -185,7 +185,7 @@ class Interpreter {
 
   std::string ValueDataToString(const Value &V) const;
 
-  llvm::Expected<Expr *> convertExprToValue(Expr *E, bool IsOOP = true);
+  llvm::Expected<Expr *> convertExprToValue(Expr *E, bool IsOOP = false);
 
   // When we deallocate clang::Value we need to run the destructor of the type.
   // This function forces emission of the needed dtor.
diff --git a/clang/include/clang/Interpreter/Value.h b/clang/include/clang/Interpreter/Value.h
index b2e72261874f1..dda8c6bbf09aa 100644
--- a/clang/include/clang/Interpreter/Value.h
+++ b/clang/include/clang/Interpreter/Value.h
@@ -212,10 +212,68 @@ template <> inline void *Value::as() const {
 
 class ValueBuffer {
 public:
+  enum Kind { K_Builtin, K_Array, K_Pointer, K_Unknown };
   QualType Ty;
+  Kind K;
+  ValueBuffer(Kind K = K_Unknown) : K(K) {}
   virtual ~ValueBuffer() = default;
-  virtual std::string toString() const = 0;
-  virtual bool isValid() const = 0;
+  bool isUnknown() const { return K == K_Unknown; }
+  bool isBuiltin() const { return K == K_Builtin; }
+  bool isArray() const { return K == K_Array; }
+  bool isPointer() const { return K == K_Pointer; }
+  static bool classof(const ValueBuffer *) { return true; }
+};
+
+class BuiltinValueBuffer;
+class ArrayValueBuffer;
+class PointerValueBuffer;
+
+class BuiltinValueBuffer : public ValueBuffer {
+public:
+  std::vector<uint8_t> raw;
+  BuiltinValueBuffer(QualType _Ty) : ValueBuffer(K_Builtin) { Ty = _Ty; }
+  template <typename T> T as() const {
+    T v{};
+    // assert(raw.size() >= sizeof(T) && "Buffer too small for type!");
+    memcpy(&v, raw.data(), sizeof(T));
+    return v;
+  }
+  static bool classof(const ValueBuffer *B) { return B->isBuiltin(); }
+};
+
+class ArrayValueBuffer : public ValueBuffer {
+public:
+  std::vector<std::unique_ptr<ValueBuffer>> Elements;
+  ArrayValueBuffer(QualType EleTy) : ValueBuffer(K_Array) { Ty = EleTy; }
+
+  static bool classof(const ValueBuffer *B) { return B->isArray(); }
+};
+
+class PointerValueBuffer : public ValueBuffer {
+public:
+  uint64_t Address = 0;
+  std::unique_ptr<ValueBuffer> Pointee; // optional, used only for char*
+
+  PointerValueBuffer(QualType _Ty, uint64_t Addr = 0)
+      : ValueBuffer(K_Pointer), Address(Addr) {
+    Ty = _Ty;
+  }
+
+  static bool classof(const ValueBuffer *B) { return B->isPointer(); }
+};
+
+class ValueToString {
+private:
+  ASTContext &Ctx;
+
+public:
+  ValueToString(ASTContext &Ctx) : Ctx(Ctx) {}
+  std::string toString(const ValueBuffer *);
+
+private:
+  std::string BuiltinToString(const BuiltinValueBuffer &B);
+  std::string PointerToString(const PointerValueBuffer &P);
+  std::string ArrayToString(const ArrayValueBuffer &A);
 };
 
 class ValueResultManager {
@@ -226,7 +284,7 @@ class ValueResultManager {
   explicit ValueResultManager(ASTContext &Ctx, llvm::orc::MemoryAccess &MemAcc);
 
   static std::unique_ptr<ValueResultManager>
-  Create(llvm::orc::LLJIT &EE, ASTContext &Ctx, bool IsOutOfProcess = true);
+  Create(llvm::orc::LLJIT &EE, ASTContext &Ctx, bool IsOutOfProcess = false);
 
   ValueId registerPendingResult(QualType QT) {
     ValueId NewID = NextID.fetch_add(1, std::memory_order_relaxed);
diff --git a/clang/lib/Interpreter/InterpreterValuePrinter.cpp b/clang/lib/Interpreter/InterpreterValuePrinter.cpp
index 83064e022323f..7faae1ecaa9d9 100644
--- a/clang/lib/Interpreter/InterpreterValuePrinter.cpp
+++ b/clang/lib/Interpreter/InterpreterValuePrinter.cpp
@@ -96,12 +96,15 @@ static std::string QualTypeToString(ASTContext &Ctx, QualType QT) {
   return GetFullTypeName(Ctx, NonRefTy);
 }
 
-static std::string EnumToString(const Value &V) {
+static std::string EnumToString(ASTContext &Ctx, QualType QT, uint64_t Data) {
   std::string Str;
   llvm::raw_string_ostream SS(Str);
-  ASTContext &Ctx = const_cast<ASTContext &>(V.getASTContext());
 
-  uint64_t Data = V.convertTo<uint64_t>();
+  QualType DesugaredTy = QT.getDesugaredType(Ctx);
+  const EnumType *EnumTy = DesugaredTy.getNonReferenceType()->getAs<EnumType>();
+  assert(EnumTy && "Fail to cast to enum type");
+
+  EnumDecl *ED = EnumTy->getDecl();
   bool IsFirst = true;
   llvm::APSInt AP = Ctx.MakeIntValue(Data, V.getType());
 
@@ -120,12 +123,13 @@ static std::string EnumToString(const Value &V) {
   return Str;
 }
 
-static std::string FunctionToString(const Value &V, const void *Ptr) {
+static std::string FunctionToString(ASTContext &Ctx, QualType QT,
+                                    const void *Ptr) {
   std::string Str;
   llvm::raw_string_ostream SS(Str);
   SS << "Function @" << Ptr;
 
-  const DeclContext *PTU = V.getASTContext().getTranslationUnitDecl();
+  const DeclContext *PTU = Ctx.getTranslationUnitDecl();
   // Find the last top-level-stmt-decl. This is a forward iterator but the
   // partial translation unit should not be large.
   const TopLevelStmtDecl *TLSD = nullptr;
@@ -154,84 +158,85 @@ static std::string FunctionToString(const Value &V, const void *Ptr) {
   return Str;
 }
 
-static std::string VoidPtrToString(const void *Ptr) {
-  std::string Str;
-  llvm::raw_string_ostream SS(Str);
-  SS << Ptr;
-  return Str;
-}
-
-static std::string CharPtrToString(const char *Ptr) {
-  if (!Ptr)
-    return "0";
-
-  std::string Result = "\"";
-  Result += Ptr;
-  Result += '"';
-  return Result;
+static std::string escapeString(const std::vector<uint8_t> &Raw) {
+  std::string Out;
+  for (char c : Raw) {
+    switch (c) {
+    case '\n':
+      Out += "\\n";
+      break;
+    case '\t':
+      Out += "\\t";
+      break;
+    case '\r':
+      Out += "\\r";
+      break;
+    case '\"':
+      Out += "\\\"";
+      break;
+    case '\\':
+      Out += "\\\\";
+      break;
+    default:
+      if (std::isprint(static_cast<unsigned char>(c)))
+        Out.push_back(c);
+      else {
+        char buf[5];
+        snprintf(buf, sizeof(buf), "\\x%02X", static_cast<unsigned char>(c));
+        Out += buf;
+      }
+      break;
+    }
+  }
+  return Out;
 }
 
 namespace clang {
 
-struct ValueRef : public Value {
-  ValueRef(const Interpreter *In, void *Ty) : Value(In, Ty) {
-    // Tell the base class to not try to deallocate if it manages the value.
-    IsManuallyAlloc = false;
-  }
-};
-
-std::string Interpreter::ValueDataToString(const Value &V) const {
-  Sema &S = getCompilerInstance()->getSema();
-  ASTContext &Ctx = S.getASTContext();
-
-  QualType QT = V.getType();
+std::string Interpreter::ValueDataToString(const Value &V) const { return ""; }
+
+std::string ValueToString::toString(const ValueBuffer *Buf) {
+  if (const BuiltinValueBuffer *B = llvm::dyn_cast<BuiltinValueBuffer>(Buf))
+    return BuiltinToString(*B);
+  else if (const ArrayValueBuffer *A = llvm::dyn_cast<ArrayValueBuffer>(Buf))
+    return ArrayToString(*A);
+  else if (const PointerValueBuffer *P =
+               llvm::dyn_cast<PointerValueBuffer>(Buf))
+    return PointerToString(*P);
+  return "";
+}
 
-  if (const ConstantArrayType *CAT = Ctx.getAsConstantArrayType(QT)) {
-    QualType ElemTy = CAT->getElementType();
-    size_t ElemCount = Ctx.getConstantArrayElementCount(CAT);
-    const Type *BaseTy = CAT->getBaseElementTypeUnsafe();
-    size_t ElemSize = Ctx.getTypeSizeInChars(BaseTy).getQuantity();
+std::string ValueToString::BuiltinToString(const BuiltinValueBuffer &B) {
+  if (B.raw.empty())
+    return ""; // No data in buffer
 
-    // Treat null terminated char arrays as strings basically.
-    if (ElemTy->isCharType()) {
-      char last = *(char *)(((uintptr_t)V.getPtr()) + ElemCount * ElemSize - 1);
-      if (last == '\0')
-        return CharPtrToString((char *)V.getPtr());
-    }
+  QualType QT = B.Ty;
+  QualType DesugaredTy = QT.getDesugaredType(Ctx);
+  QualType NonRefTy = DesugaredTy.getNonReferenceType();
 
-    std::string Result = "{ ";
-    for (unsigned Idx = 0, N = CAT->getZExtSize(); Idx < N; ++Idx) {
-      ValueRef InnerV = ValueRef(this, ElemTy.getAsOpaquePtr());
-      if (ElemTy->isBuiltinType()) {
-        // Single dim arrays, advancing.
-        uintptr_t Offset = (uintptr_t)V.getPtr() + Idx * ElemSize;
-        InnerV.setRawBits((void *)Offset, ElemSize * 8);
-      } else {
-        // Multi dim arrays, position to the next dimension.
-        size_t Stride = ElemCount / N;
-        uintptr_t Offset = ((uintptr_t)V.getPtr()) + Idx * Stride * ElemSize;
-        InnerV.setPtr((void *)Offset);
+  if (NonRefTy->isCharType()) {
+    unsigned char c = B.as<unsigned char>();
+    switch (c) {
+    case '\n':
+      return "'\\n'";
+    case '\t':
+      return "'\\t'";
+    case '\r':
+      return "'\\r'";
+    case '\'':
+      return "'\\''";
+    case '\\':
+      return "'\\'";
+    case '\0':
+      return "";
+    default:
+      if (std::isprint(c))
+        return std::string("'") + static_cast<char>(c) + "'";
+      else {
+        return llvm::formatv("'\\x{0:02X}'", c).str();
       }
-
-      Result += ValueDataToString(InnerV);
-
-      // Skip the \0 if the char types
-      if (Idx < N - 1)
-        Result += ", ";
     }
-    Result += " }";
-    return Result;
   }
-
-  QualType DesugaredTy = QT.getDesugaredType(Ctx);
-  QualType NonRefTy = DesugaredTy.getNonReferenceType();
-
-  // FIXME: Add support for user defined printers.
-  // LookupResult R = LookupUserDefined(S, QT);
-  // if (!R.empty())
-  //   return CallUserSpecifiedPrinter(R, V);
-
-  // If it is a builtin type dispatch to the builtin overloads.
   if (auto *BT = DesugaredTy.getCanonicalType()->getAs<BuiltinType>()) {
 
     auto formatFloating = [](auto Val, char Suffix = '\0') -> std::string {
@@ -263,78 +268,117 @@ std::string Interpreter::ValueDataToString(const Value &V) const {
       return "{ error: unknown builtin type '" + std::to_string(BT->getKind()) +
              " '}";
     case clang::BuiltinType::Bool:
-      SS << ((V.getBool()) ? "true" : "false");
-      return Str;
-    case clang::BuiltinType::Char_S:
-      SS << '\'' << V.getChar_S() << '\'';
-      return Str;
-    case clang::BuiltinType::SChar:
-      SS << '\'' << V.getSChar() << '\'';
-      return Str;
-    case clang::BuiltinType::Char_U:
-      SS << '\'' << V.getChar_U() << '\'';
-      return Str;
-    case clang::BuiltinType::UChar:
-      SS << '\'' << V.getUChar() << '\'';
+      SS << ((B.as<bool>()) ? "true" : "false");
       return Str;
     case clang::BuiltinType::Short:
-      SS << V.getShort();
+      SS << B.as<short>();
       return Str;
     case clang::BuiltinType::UShort:
-      SS << V.getUShort();
+      SS << B.as<unsigned short>();
       return Str;
     case clang::BuiltinType::Int:
-      SS << V.getInt();
+      SS << B.as<int>();
       return Str;
     case clang::BuiltinType::UInt:
-      SS << V.getUInt();
+      SS << B.as<unsigned int>();
       return Str;
     case clang::BuiltinType::Long:
-      SS << V.getLong();
+      SS << B.as<long>();
       return Str;
     case clang::BuiltinType::ULong:
-      SS << V.getULong();
+      SS << B.as<unsigned long>();
       return Str;
     case clang::BuiltinType::LongLong:
-      SS << V.getLongLong();
+      SS << B.as<long long>();
       return Str;
     case clang::BuiltinType::ULongLong:
-      SS << V.getULongLong();
+      SS << B.as<unsigned long long>();
       return Str;
     case clang::BuiltinType::Float:
-      return formatFloating(V.getFloat(), /*suffix=*/'f');
+      return formatFloating(B.as<float>(), /*suffix=*/'f');
 
     case clang::BuiltinType::Double:
-      return formatFloating(V.getDouble());
+      return formatFloating(B.as<double>());
 
     case clang::BuiltinType::LongDouble:
-      return formatFloating(V.getLongDouble(), /*suffix=*/'L');
+      return formatFloating(B.as<long double>(), /*suffix=*/'L');
     }
   }
 
+  if (NonRefTy->isEnumeralType())
+    return EnumToString(Ctx, QT, B.as<uint64_t>());
+
+  return "";
+}
+
+std::string ValueToString::PointerToString(const PointerValueBuffer &P) {
+
+  QualType QT = P.Ty;
+  QualType DesugaredTy = QT.getDesugaredType(Ctx);
+  QualType NonRefTy = DesugaredTy.getNonReferenceType();
+
+  auto PtrTy = dyn_cast<PointerType>(QT.getTypePtr());
+  if (!PtrTy)
+    return "";
+
+  auto PointeeTy = PtrTy->getPointeeType();
+
+  // char* -> print string literal
+  if (PointeeTy->isCharType() && P.Pointee) {
+    if (auto *BE = static_cast<BuiltinValueBuffer *>(P.Pointee.get()))
+      return "\"" + escapeString(BE->raw) + "\"";
+  }
+
+  if (P.Address == 0)
+    return "nullptr";
+
   if ((NonRefTy->isPointerType() || NonRefTy->isMemberPointerType()) &&
       NonRefTy->getPointeeType()->isFunctionProtoType())
-    return FunctionToString(V, V.getPtr());
+    return FunctionToString(Ctx, QT, (void *)P.Address);
 
   if (NonRefTy->isFunctionType())
-    return FunctionToString(V, &V);
+    return FunctionToString(Ctx, QT, (void *)P.Address);
 
-  if (NonRefTy->isEnumeralType())
-    return EnumToString(V);
-
-  if (NonRefTy->isNullPtrType())
-    return "nullptr\n";
-
-  // FIXME: Add support for custom printers in C.
-  if (NonRefTy->isPointerType()) {
-    if (NonRefTy->getPointeeType()->isCharType())
-      return CharPtrToString((char *)V.getPtr());
+  std::ostringstream OS;
+  OS << "@0x" << std::hex << P.Address;
+  return OS.str();
+}
 
-    return VoidPtrToString(V.getPtr());
+std::string ValueToString::ArrayToString(const ArrayValueBuffer &A) {
+  if (const ConstantArrayType *CAT = Ctx.getAsConstantArrayType(A.Ty)) {
+    QualType ElemTy = CAT->getElementType();
+    std::ostringstream OS;
+    // Treat null terminated char arrays as strings basically.
+    if (ElemTy->isCharType() && !A.Elements.empty()) {
+      if (const auto *B =
+              llvm::dyn_cast<BuiltinValueBuffer>(A.Elements.back().get())) {
+        char last = (char)B->raw.back();
+        if (last != '\0')
+          goto not_a_string;
+      }
+      OS << "\"";
+      for (size_t i = 0; i < A.Elements.size(); ++i) {
+        if (const auto *B =
+                llvm::dyn_cast<BuiltinValueBuffer>(A.Elements[i].get())) {
+          OS << static_cast<char>(B->raw.back());
+        }
+      }
+      OS << "\"";
+      return OS.str();
+    }
+  }
+not_a_string:
+  std::ostringstream OS;
+
+  OS << "{ ";
+  for (size_t i = 0; i < A.Elements.size(); ++i) {
+    OS << this->toString(A.Elements[i].get());
+    if (i + 1 < A.Elements.size())
+      OS << ", ";
   }
 
-  // Fall back to printing just the address of the unknown object.
-  return "@" + VoidPtrToString(V.getPtr());
+  OS << " }";
+  return OS.str();
 }
 
 std::string ValueResultManager::ValueTypeToString(QualType QT) const {
@@ -358,18 +402,18 @@ void ValueResultManager::resetAndDump() {
   ValBuf.swap(Val);
 
   // Don't even try to print a void or an invalid type, it doesn't make sense.
-  if (Ty->isVoidType() || !Val->isValid())
+  if (Ty->isVoidType() || (!Val || (Val && Val->isUnknown())))
     return;
 
   // We need to get all the results together then print it, since `printType` is
   // much faster than `printData`.
   std::string Str;
   llvm::raw_string_ostream SS(Str);
-
+  ValueToString ValToStr(Ctx);
   SS << "(";
   SS << ValueTypeToString(Ty);
   SS << ") ";
-  SS << Val->toString();
+  SS << ValToStr.toString(Val.get());
   SS << "\n";
   llvm::outs() << Str;
 }
@@ -435,7 +479,7 @@ class ExprConverter {
     return VD;
   }
 
-  /// Wrap rvalues in a temporary so they become addressable.
+  /// Wrap rvalues in a temporary (var) so they become addressable.
   Expr *CreateMaterializeTemporaryExpr(Expr *E) {
     return new (Ctx) MaterializeTemporaryExpr(E->getType(), E,
                                               /*BoundToLvalueReference=*/true);
@@ -462,6 +506,9 @@ class ExprConverter {
                                  Expr *E) {
     return makeAddressable(QTy, E);
   }
+  ExprResult handleEnumTypeExpr(const EnumType *, QualType QTy, Expr *E) {
+    return makeAddressable(QTy, E);
+  }
 };
 
 class InterfaceKindVisitor : public TypeVisitor<InterfaceKindVisitor, bool> {
@@ -506,10 +553,14 @@ class InterfaceKindVisitor : public TypeVisitor<InterfaceKindVisitor, bool> {
     return true;
   }
 
+  bool VisitEnumType(const EnumType *Ty) {
+    Args.push_back(Converter.handleEnumTypeExpr(Ty, QualType(Ty, 0), E).get());
+    return true;
+  }
+
   bool VisitRecordType(const RecordType *) { return true; }
   bool VisitMemberPointerType(const MemberPointerType *) { return true; }
   bool VisitFunctionType(const FunctionType *) { return true; }
-  bool VisitEnumType(const EnumType *) { return true; }
 };
 
 enum RunTimeFnTag { OrcSendResult, ClangSendResult };
diff --git a/clang/lib/Interpreter/Value.cpp b/clang/lib/Interpreter/Value.cpp
index 8136dee622c96..3ac741c83c808 100644
--- a/clang/lib/Interpreter/Value.cpp
+++ b/clang/lib/Interpreter/Value.cpp
@@ -294,197 +294,6 @@ void Value::print(llvm::raw_ostream &Out) const {
   Out << Str;
 }
 
-class BuiltinValueBuffer : public ValueBuffer {
-public:
-  std::vector<char> raw;
-  BuiltinValueBuffer(QualType _Ty) { Ty = _Ty; }
-  template <typename T> T as() const {
-    T v{};
-    assert(raw.size() >= sizeof(T) && "Buffer too small for type!");
-    memcpy(&v, raw.data(), sizeof(T));
-    return v;
-  }
-  std::string toString() const override {
-    if (Ty->isCharType()) {
-      unsigned char c = as<unsigned char>();
-      switch (c) {
-      case '\n':
-        return "'\\n'";
-      case '\t':
-        return "'\\t'";
-      case '\r':
-        return "'\\r'";
-      case '\'':
-        return "'\\''";
-      case '\\':
-        return "'\\'";
-      default:
-        if (std::isprint(c))
-          return std::string("'") + static_cast<char>(c) + "'";
-        else {
-          return llvm::formatv("'\\x{0:02X}'", c).str();
-        }
-      }
-    }
-    if (auto *BT = Ty.getCanonicalType()->getAs<BuiltinType>()) {
-
-      auto formatFloating = [](auto Val, char Suffix = '\0') -> std::string {
-        std::string Out;
-        llvm::raw_string_ostream SS(Out);
-
-        if (std::isnan(Val) || std::isinf(Val)) {
-          SS << llvm::format("%g", Val);
-          return SS.str();
-        }
-        if (Val == static_cast<decltype(Val)>(static_cast<int64_t>(Val)))
-          SS << llvm::format("%.1f", Val);
-        else if (std::abs(Val) < 1e-4 || std::abs(Val) > 1e6 || Suffix == 'f')
-          SS << llvm::format("%#.6g", Val);
-        else if (Suffix == 'L')
-          SS << llvm::format("%#.12Lg", Val);
-        else
-          SS << llvm::format("%#.8g", Val);
-
-        if (Suffix != '\0')
-          SS << Suffix;
-        return SS.str();
-      };
-
-      std::string Str;
-      llvm::raw_string_ostream SS(Str);
-      switch (BT->getKind()) {
-      default:
-        return "{ error: unknown builtin type '" +
-               std::to_string(BT->getKind()) + " '}";
-      case clang::BuiltinType::Bool:
-        SS << ((as<bool>()) ? "true" : "false");
-        return Str;
-      case clang::BuiltinType::Short:
-        SS << as<short>();
-        return Str;
-      case clang::BuiltinType::UShort:
-        SS << as<unsigned short>();
-        return Str;
-      case clang::BuiltinType::Int:
-        SS << as<int>();
-        return Str;
-      case clang::BuiltinType::UInt:
-        SS << as<unsigned int>();
-        return Str;
-      case clang::BuiltinType::Long:
-        SS << as<long>();
-        return Str;
-      case clang::BuiltinType::ULong:
-        SS << as<unsigned long>();
-        return Str;
-      case clang::BuiltinType::LongLong:
-        SS << as<long long>();
-        return Str;
-      case clang::BuiltinType::ULongLong:
-        SS << as<unsigned long long>();
-        return Str;
-      case clang::BuiltinType::Float:
-        return formatFloating(as<float>(), /*suffix=*/'f');
-
-      case clang::BuiltinType::Double:
-        return formatFloating(as<double>());
-
-      case clang::BuiltinType::LongDouble:
-        return formatFloating(as<long double>(), /*suffix=*/'L');
-      }
-    }
-
-    return "";
-  }
-
-  bool isValid() const override { return !raw.empty(); }
-};
-
-class ArrayValueBuffer : public ValueBuffer {
-public:
-  std::vector<std::unique_ptr<ValueBuffer>> Elements;
-  ArrayValueBuffer(QualType EleTy) { Ty = EleTy; }
-  std::string toString() const override {
-    std::ostringstream OS;
-    OS << "{";
-    for (size_t i = 0; i < Elements.size(); ++i) {
-      OS << Elements[i]->toString();
-      if (i + 1 < Elements.size())
-        OS << ",";
-    }
-    OS << "}";
-    return OS.str();
-  }
-
-  bool isValid() const override { return !Elements.empty(); }
-};
-
-static std::string escapeString(const std::vector<char> &Raw) {
-  std::string Out;
-  for (char c : Raw) {
-    switch (c) {
-    case '\n':
-      Out += "\\n";
-      break;
-    case '\t':
-      Out += "\\t";
-      break;
-    case '\r':
-      Out += "\\r";
-      break;
-    case '\"':
-      Out += "\\\"";
-      break;
-    case '\\':
-      Out += "\\\\";
-      break;
-    default:
-      if (std::isprint(static_cast<unsigned char>(c)))
-        Out.push_back(c);
-      else {
-        char buf[5];
-        snprintf(buf, sizeof(buf), "\\x%02X", static_cast<unsigned char>(c));
-        Out += buf;
-      }
-      break;
-    }
-  }
-  return Out;
-}
-
-class PointerValueBuffer : public ValueBuffer {
-public:
-  uint64_t Address = 0;
-  std::unique_ptr<ValueBuffer> Pointee; // optional, used only for char*
-
-  PointerValueBuffer(QualType _Ty, uint64_t Addr = 0) : Address(Addr) {
-    Ty = _Ty;
-  }
-
-  std::string toString() const override {
-    auto PtrTy = dyn_cast<PointerType>(Ty.getTypePtr());
-    if (!PtrTy)
-      return "";
-
-    auto PointeeTy = PtrTy->getPointeeType();
-
-    // char* -> print string literal
-    if (PointeeTy->isCharType() && Pointee) {
-      if (auto *BE = static_cast<BuiltinValueBuffer *>(Pointee.get()))
-        return "\"" + escapeString(BE->raw) + "\"";
-    }
-
-    if (Address == 0)
-      return "nullptr";
-
-    std::ostringstream OS;
-    OS << "0x" << std::hex << Address;
-    return OS.str();
-  }
-
-  bool isValid() const override { return Address != 0; }
-};
-
 class ReaderDispatcher {
 private:
   ASTContext &Ctx;
@@ -539,6 +348,11 @@ class TypeReadVisitor
     return Dispatcher.readArray(QualType(AT, 0), Addr);
   }
 
+  llvm::Expected<std::unique_ptr<ValueBuffer>>
+  VisitEnumType(const EnumType *ET) {
+    return Dispatcher.readBuiltin(QualType(ET, 0), Addr);
+  }
+
   llvm::Expected<std::unique_ptr<ValueBuffer>>
   VisitRecordType(const RecordType *RT) {
     return llvm::make_error<llvm::StringError>(
@@ -562,7 +376,7 @@ ReaderDispatcher::readBuiltin(QualType Ty, llvm::orc::ExecutorAddr Addr) {
 
   auto Buf = std::make_unique<BuiltinValueBuffer>(Ty);
   const auto &Res = *ResOrErr;
-  std::vector<char> ElemBuf(Size);
+  std::vector<uint8_t> ElemBuf(Size);
   std::memcpy(ElemBuf.data(), Res.back().data(), Size);
   Buf->raw = std::move(ElemBuf);
   return std::move(Buf);
@@ -598,12 +412,20 @@ ReaderDispatcher::ReaderDispatcher::readPointer(QualType Ty,
   if (!PtrTy)
     return llvm::make_error<llvm::StringError>("Not a PointerType",
                                                llvm::inconvertibleErrorCode());
+  unsigned PtrWidth = Ctx.getTypeSizeInChars(Ty).getQuantity();
+  uint64_t PtrValAddr = 0;
+  if (PtrWidth == 32) {
+    auto AddrOrErr = MA.readUInt32s({Addr});
+    if (!AddrOrErr)
+      return AddrOrErr.takeError();
+    PtrValAddr = AddrOrErr->back();
+  } else {
+    auto AddrOrErr = MA.readUInt64s({Addr});
+    if (!AddrOrErr)
+      return AddrOrErr.takeError();
+    PtrValAddr = AddrOrErr->back();
+  }
 
-  auto AddrOrErr = MA.readUInt64s({Addr});
-  if (!AddrOrErr)
-    return AddrOrErr.takeError();
-
-  uint64_t PtrValAddr = AddrOrErr->back();
   if (PtrValAddr == 0)
     return std::make_unique<PointerValueBuffer>(Ty); // null pointer
 
@@ -624,6 +446,8 @@ ReaderDispatcher::ReaderDispatcher::readPointer(QualType Ty,
     }
     auto Buf = std::make_unique<BuiltinValueBuffer>(PointeeTy);
     Buf->raw.assign(S.begin(), S.end());
+    if (S.empty())
+      Buf->raw.push_back('\0'); // represent ""
     PtrBuf->Pointee = std::move(Buf);
   }
   // else {

>From e8ce46b065b240dbc4bf1da22b1d5c107778b027 Mon Sep 17 00:00:00 2001
From: SahilPatidar <patidarsahil2001 at gmail.com>
Date: Sat, 6 Sep 2025 12:02:16 +0530
Subject: [PATCH 3/5] Rebased

---
 clang/lib/Interpreter/InterpreterValuePrinter.cpp | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/clang/lib/Interpreter/InterpreterValuePrinter.cpp b/clang/lib/Interpreter/InterpreterValuePrinter.cpp
index 7faae1ecaa9d9..492fbe36bc963 100644
--- a/clang/lib/Interpreter/InterpreterValuePrinter.cpp
+++ b/clang/lib/Interpreter/InterpreterValuePrinter.cpp
@@ -100,15 +100,10 @@ static std::string EnumToString(ASTContext &Ctx, QualType QT, uint64_t Data) {
   std::string Str;
   llvm::raw_string_ostream SS(Str);
 
-  QualType DesugaredTy = QT.getDesugaredType(Ctx);
-  const EnumType *EnumTy = DesugaredTy.getNonReferenceType()->getAs<EnumType>();
-  assert(EnumTy && "Fail to cast to enum type");
-
-  EnumDecl *ED = EnumTy->getDecl();
   bool IsFirst = true;
-  llvm::APSInt AP = Ctx.MakeIntValue(Data, V.getType());
+  llvm::APSInt AP = Ctx.MakeIntValue(Data, QT);
 
-  auto *ED = V.getType()->castAsEnumDecl();
+  auto *ED = QT->castAsEnumDecl();
   for (auto I = ED->enumerator_begin(), E = ED->enumerator_end(); I != E; ++I) {
     if (I->getInitVal() == AP) {
       if (!IsFirst)

>From a5d7d9e4d8d9cdabe878542fa83a53381d708d71 Mon Sep 17 00:00:00 2001
From: SahilPatidar <patidarsahil2001 at gmail.com>
Date: Mon, 8 Sep 2025 16:54:10 +0530
Subject: [PATCH 4/5] Fix some issues

---
 .../Interpreter/InterpreterValuePrinter.cpp   | 225 ++++++++++--------
 clang/lib/Interpreter/Value.cpp               |  53 +++--
 2 files changed, 158 insertions(+), 120 deletions(-)

diff --git a/clang/lib/Interpreter/InterpreterValuePrinter.cpp b/clang/lib/Interpreter/InterpreterValuePrinter.cpp
index 492fbe36bc963..508ae0bf71d9f 100644
--- a/clang/lib/Interpreter/InterpreterValuePrinter.cpp
+++ b/clang/lib/Interpreter/InterpreterValuePrinter.cpp
@@ -136,7 +136,8 @@ static std::string FunctionToString(ASTContext &Ctx, QualType QT,
   // *OpaqueType, void *Val);
   const FunctionDecl *FD = nullptr;
   if (auto *InterfaceCall = llvm::dyn_cast<CallExpr>(TLSD->getStmt())) {
-    const auto *Arg = InterfaceCall->getArg(/*Val*/ 3);
+    const auto *Arg = InterfaceCall->getArg(InterfaceCall->getNumArgs() - 1);
+
     // Get rid of cast nodes.
     while (const CastExpr *CastE = llvm::dyn_cast<CastExpr>(Arg))
       Arg = CastE->getSubExpr();
@@ -156,32 +157,32 @@ static std::string FunctionToString(ASTContext &Ctx, QualType QT,
 static std::string escapeString(const std::vector<uint8_t> &Raw) {
   std::string Out;
   for (char c : Raw) {
-    switch (c) {
-    case '\n':
-      Out += "\\n";
-      break;
-    case '\t':
-      Out += "\\t";
-      break;
-    case '\r':
-      Out += "\\r";
-      break;
-    case '\"':
-      Out += "\\\"";
-      break;
-    case '\\':
-      Out += "\\\\";
-      break;
-    default:
-      if (std::isprint(static_cast<unsigned char>(c)))
-        Out.push_back(c);
-      else {
-        char buf[5];
-        snprintf(buf, sizeof(buf), "\\x%02X", static_cast<unsigned char>(c));
-        Out += buf;
-      }
-      break;
+    // switch (c) {
+    // case '\n':
+    //   Out += "\\n";
+    //   break;
+    // case '\t':
+    //   Out += "\\t";
+    //   break;
+    // case '\r':
+    //   Out += "\\r";
+    //   break;
+    // case '\"':
+    //   Out += "\\\"";
+    //   break;
+    // case '\\':
+    //   Out += "\\\\";
+    //   break;
+    // default:
+    if (std::isprint(static_cast<unsigned char>(c)))
+      Out.push_back(c);
+    else {
+      char buf[5];
+      snprintf(buf, sizeof(buf), "\\x%02X", static_cast<unsigned char>(c));
+      Out += buf;
     }
+    // break;
+    // }
   }
   return Out;
 }
@@ -212,16 +213,16 @@ std::string ValueToString::BuiltinToString(const BuiltinValueBuffer &B) {
   if (NonRefTy->isCharType()) {
     unsigned char c = B.as<unsigned char>();
     switch (c) {
-    case '\n':
-      return "'\\n'";
-    case '\t':
-      return "'\\t'";
-    case '\r':
-      return "'\\r'";
-    case '\'':
-      return "'\\''";
-    case '\\':
-      return "'\\'";
+    // case '\n':
+    //   return "'\\n'";
+    // case '\t':
+    //   return "'\\t'";
+    // case '\r':
+    //   return "'\\r'";
+    // case '\'':
+    //   return "'\\''";
+    // case '\\':
+    //   return "'\\'";
     case '\0':
       return "";
     default:
@@ -312,16 +313,19 @@ std::string ValueToString::PointerToString(const PointerValueBuffer &P) {
   QualType DesugaredTy = QT.getDesugaredType(Ctx);
   QualType NonRefTy = DesugaredTy.getNonReferenceType();
 
-  auto PtrTy = dyn_cast<PointerType>(QT.getTypePtr());
-  if (!PtrTy)
-    return "";
+  if (auto PtrTy = dyn_cast<PointerType>(QT.getTypePtr())) {
+    if (!PtrTy)
+      return "";
+
+    auto PointeeTy = PtrTy->getPointeeType();
 
-  auto PointeeTy = PtrTy->getPointeeType();
+    // char* -> print string literal
+    if (PointeeTy->isCharType() && P.Pointee) {
+      if (auto *BE = static_cast<BuiltinValueBuffer *>(P.Pointee.get()))
+        return "\"" + escapeString(BE->raw) + "\"";
+    }
 
-  // char* -> print string literal
-  if (PointeeTy->isCharType() && P.Pointee) {
-    if (auto *BE = static_cast<BuiltinValueBuffer *>(P.Pointee.get()))
-      return "\"" + escapeString(BE->raw) + "\"";
+    return std::to_string(P.Address);
   }
 
   if (P.Address == 0)
@@ -334,6 +338,9 @@ std::string ValueToString::PointerToString(const PointerValueBuffer &P) {
   if (NonRefTy->isFunctionType())
     return FunctionToString(Ctx, QT, (void *)P.Address);
 
+  if (NonRefTy->isNullPtrType())
+    return "nullptr\n";
+
   std::ostringstream OS;
   OS << "@0x" << std::hex << P.Address;
   return OS.str();
@@ -342,24 +349,26 @@ std::string ValueToString::PointerToString(const PointerValueBuffer &P) {
 std::string ValueToString::ArrayToString(const ArrayValueBuffer &A) {
   if (const ConstantArrayType *CAT = Ctx.getAsConstantArrayType(A.Ty)) {
     QualType ElemTy = CAT->getElementType();
-    std::ostringstream OS;
     // Treat null terminated char arrays as strings basically.
     if (ElemTy->isCharType() && !A.Elements.empty()) {
       if (const auto *B =
               llvm::dyn_cast<BuiltinValueBuffer>(A.Elements.back().get())) {
-        char last = (char)B->raw.back();
+        char last = (char)B->raw.front();
         if (last != '\0')
           goto not_a_string;
       }
-      OS << "\"";
+      std::string Res;
+      Res += "\"";
       for (size_t i = 0; i < A.Elements.size(); ++i) {
         if (const auto *B =
                 llvm::dyn_cast<BuiltinValueBuffer>(A.Elements[i].get())) {
-          OS << static_cast<char>(B->raw.back());
+          char c = static_cast<char>(B->raw.back());
+          if (c != '\0')
+            Res += c;
         }
       }
-      OS << "\"";
-      return OS.str();
+      Res += "\"";
+      return Res;
     }
   }
 not_a_string:
@@ -436,73 +445,90 @@ Interpreter::CompileDtorCall(CXXRecordDecl *CXXRD) const {
 }
 
 class ExprConverter {
+  Sema &S;
   ASTContext &Ctx;
 
 public:
-  ExprConverter(ASTContext &Ctx) : Ctx(Ctx) {}
+  ExprConverter(Sema &S, ASTContext &Ctx) : S(S), Ctx(Ctx) {}
 
   /// Create (&E) as a void*
-  ExprResult CreateAddressOfVoidPtrExpr(QualType Ty, Expr *ForCast) {
+  ExprResult CreateAddressOfVoidPtrExpr(QualType Ty, Expr *ForCast,
+                                        bool takeAddr = false) {
     QualType VoidPtrTy = Ctx.getPointerType(Ctx.VoidTy);
 
     // &E
-    Expr *AddrOf = UnaryOperator::Create(
-        Ctx, ForCast, UO_AddrOf, Ctx.getPointerType(Ty), VK_PRValue,
-        OK_Ordinary, SourceLocation(), false, FPOptionsOverride());
+    Expr *AddrOf = ForCast;
+    if (takeAddr) {
+      AddrOf = UnaryOperator::Create(
+          Ctx, ForCast, UO_AddrOf, Ctx.getPointerType(Ty), VK_PRValue,
+          OK_Ordinary, SourceLocation(), false, FPOptionsOverride());
+    }
 
+    TypeSourceInfo *TSI = Ctx.getTrivialTypeSourceInfo(Ctx.VoidPtrTy);
+    ExprResult CastedExpr =
+        S.BuildCStyleCastExpr(SourceLocation(), TSI, SourceLocation(), AddrOf);
+    assert(!CastedExpr.isInvalid() && "Can not create cstyle cast expression");
+    return CastedExpr.get();
     // static_cast<void*>(&E)
-    return CXXStaticCastExpr::Create(
-        Ctx, VoidPtrTy, VK_PRValue, CK_BitCast, AddrOf, nullptr,
-        Ctx.getTrivialTypeSourceInfo(VoidPtrTy), FPOptionsOverride(),
-        SourceLocation(), SourceLocation(), SourceRange());
-  }
-
-  /// Create a temporary VarDecl with initializer.
-  VarDecl *createTempVarDecl(QualType Ty, llvm::StringRef BaseName,
-                             Expr *Init) {
-    static unsigned Counter = 0;
-    IdentifierInfo &Id = Ctx.Idents.get((BaseName + Twine(++Counter)).str());
-
-    VarDecl *VD = VarDecl::Create(Ctx, Ctx.getTranslationUnitDecl(),
-                                  SourceLocation(), SourceLocation(), &Id, Ty,
-                                  Ctx.getTrivialTypeSourceInfo(Ty), SC_Auto);
-
-    VD->setInit(Init);
-    VD->setInitStyle(VarDecl::CInit);
-    VD->markUsed(Ctx);
-
-    return VD;
+    // return CXXStaticCastExpr::Create(
+    //     Ctx, VoidPtrTy, VK_PRValue, CK_BitCast, AddrOf, nullptr,
+    //     Ctx.getTrivialTypeSourceInfo(VoidPtrTy), FPOptionsOverride(),
+    //     SourceLocation(), SourceLocation(), SourceRange());
   }
 
   /// Wrap rvalues in a temporary (var) so they become addressable.
   Expr *CreateMaterializeTemporaryExpr(Expr *E) {
-    return new (Ctx) MaterializeTemporaryExpr(E->getType(), E,
-                                              /*BoundToLvalueReference=*/true);
+    return S.CreateMaterializeTemporaryExpr(E->getType(), E,
+                                            /*BoundToLvalueReference=*/true);
   }
 
-  /// Generic helper: materialize if needed, then &expr as void*.
-  ExprResult makeAddressable(QualType QTy, Expr *E) {
+  ExprResult makeScalarAddressable(QualType Ty, Expr *E) {
     if (E->isLValue() || E->isXValue())
-      return CreateAddressOfVoidPtrExpr(QTy, E);
-
-    if (E->isPRValue())
-      return CreateAddressOfVoidPtrExpr(QTy, CreateMaterializeTemporaryExpr(E));
-
-    return ExprError();
+      return CreateAddressOfVoidPtrExpr(Ty, E, /*takeAddr=*/true);
+    return CreateAddressOfVoidPtrExpr(Ty, CreateMaterializeTemporaryExpr(E),
+                                      /*takeAddr=*/true);
   }
 
   ExprResult handleBuiltinTypeExpr(const BuiltinType *, QualType QTy, Expr *E) {
-    return makeAddressable(QTy, E);
+    return makeScalarAddressable(QTy, E);
   }
+
+  ExprResult handleEnumTypeExpr(const EnumType *, QualType QTy, Expr *E) {
+    return makeScalarAddressable(QTy, E);
+  }
+
   ExprResult handlePointerTypeExpr(const PointerType *, QualType QTy, Expr *E) {
-    return makeAddressable(QTy, E);
+    // Pointer expressions always evaluate to a pointer value.
+    // No need to take address or materialize.
+    return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/false);
   }
+
   ExprResult handleArrayTypeExpr(const ConstantArrayType *, QualType QTy,
                                  Expr *E) {
-    return makeAddressable(QTy, E);
+    if (isa<StringLiteral>(E)) {
+      if (Ctx.getLangOpts().CPlusPlus)
+        return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/true);
+      return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/false);
+    }
+
+    if (E->isLValue() || E->isXValue())
+      return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/true);
+    return CreateAddressOfVoidPtrExpr(QTy, E,
+                                      /*takeAddr=*/false);
   }
-  ExprResult handleEnumTypeExpr(const EnumType *, QualType QTy, Expr *E) {
-    return makeAddressable(QTy, E);
+
+  ExprResult handleFunctionTypeExpr(const FunctionType *, QualType QTy,
+                                    Expr *E) {
+    if (Ctx.getLangOpts().CPlusPlus)
+      return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/true);
+    return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/false);
+  }
+
+  ExprResult handleAnyObjectExpr(const Type *, QualType QTy, Expr *E) {
+    if (E->isLValue() || E->isXValue())
+      return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/true);
+    return CreateAddressOfVoidPtrExpr(QTy, CreateMaterializeTemporaryExpr(E),
+                                      /*takeAddr=*/true);
   }
 };
 
@@ -514,10 +540,15 @@ class InterfaceKindVisitor : public TypeVisitor<InterfaceKindVisitor, bool> {
 
 public:
   InterfaceKindVisitor(Sema &S, Expr *E, llvm::SmallVectorImpl<Expr *> &Args)
-      : S(S), E(E), Args(Args), Converter(S.getASTContext()) {}
+      : S(S), E(E), Args(Args), Converter(S, S.getASTContext()) {}
 
   bool transformExpr(QualType Ty) { return Visit(Ty.getTypePtr()); }
 
+  bool VisitType(const Type *T) {
+    Args.push_back(Converter.handleAnyObjectExpr(T, QualType(T, 0), E).get());
+    return true;
+  }
+
   bool VisitBuiltinType(const BuiltinType *Ty) {
     if (Ty->isNullPtrType()) {
       Args.push_back(E);
@@ -548,14 +579,16 @@ class InterfaceKindVisitor : public TypeVisitor<InterfaceKindVisitor, bool> {
     return true;
   }
 
+  bool VisitFunctionType(const FunctionType *Ty) {
+    Args.push_back(
+        Converter.handleFunctionTypeExpr(Ty, QualType(Ty, 0), E).get());
+    return true;
+  }
+
   bool VisitEnumType(const EnumType *Ty) {
     Args.push_back(Converter.handleEnumTypeExpr(Ty, QualType(Ty, 0), E).get());
     return true;
   }
-
-  bool VisitRecordType(const RecordType *) { return true; }
-  bool VisitMemberPointerType(const MemberPointerType *) { return true; }
-  bool VisitFunctionType(const FunctionType *) { return true; }
 };
 
 enum RunTimeFnTag { OrcSendResult, ClangSendResult };
diff --git a/clang/lib/Interpreter/Value.cpp b/clang/lib/Interpreter/Value.cpp
index 3ac741c83c808..f3c89b620b505 100644
--- a/clang/lib/Interpreter/Value.cpp
+++ b/clang/lib/Interpreter/Value.cpp
@@ -315,6 +315,9 @@ class ReaderDispatcher {
   llvm::Expected<std::unique_ptr<ValueBuffer>>
   readArray(QualType Ty, llvm::orc::ExecutorAddr Addr);
 
+  llvm::Expected<std::unique_ptr<ValueBuffer>>
+  readOtherObject(QualType Ty, llvm::orc::ExecutorAddr Addr);
+
   // TODO: record, function, etc.
 };
 
@@ -329,8 +332,7 @@ class TypeReadVisitor
       : Dispatcher(D), Addr(A) {}
 
   llvm::Expected<std::unique_ptr<ValueBuffer>> VisitType(const Type *T) {
-    return llvm::make_error<llvm::StringError>(
-        "Unsupported type in ReaderDispatcher", llvm::inconvertibleErrorCode());
+    return Dispatcher.readOtherObject(QualType(T, 0), Addr);
   }
 
   llvm::Expected<std::unique_ptr<ValueBuffer>>
@@ -352,13 +354,6 @@ class TypeReadVisitor
   VisitEnumType(const EnumType *ET) {
     return Dispatcher.readBuiltin(QualType(ET, 0), Addr);
   }
-
-  llvm::Expected<std::unique_ptr<ValueBuffer>>
-  VisitRecordType(const RecordType *RT) {
-    return llvm::make_error<llvm::StringError>(
-        "RecordType reading not yet implemented",
-        llvm::inconvertibleErrorCode());
-  }
 };
 
 llvm::Expected<std::unique_ptr<ValueBuffer>>
@@ -412,20 +407,20 @@ ReaderDispatcher::ReaderDispatcher::readPointer(QualType Ty,
   if (!PtrTy)
     return llvm::make_error<llvm::StringError>("Not a PointerType",
                                                llvm::inconvertibleErrorCode());
-  unsigned PtrWidth = Ctx.getTypeSizeInChars(Ty).getQuantity();
-  uint64_t PtrValAddr = 0;
-  if (PtrWidth == 32) {
-    auto AddrOrErr = MA.readUInt32s({Addr});
-    if (!AddrOrErr)
-      return AddrOrErr.takeError();
-    PtrValAddr = AddrOrErr->back();
-  } else {
-    auto AddrOrErr = MA.readUInt64s({Addr});
-    if (!AddrOrErr)
-      return AddrOrErr.takeError();
-    PtrValAddr = AddrOrErr->back();
-  }
-
+  // unsigned PtrWidth = Ctx.getTypeSizeInChars(Ty).getQuantity();
+  // uint64_t PtrValAddr = 0;
+  // if (PtrWidth == 32) {
+  //   auto AddrOrErr = MA.readUInt32s({Addr});
+  //   if (!AddrOrErr)
+  //     return AddrOrErr.takeError();
+  //   PtrValAddr = AddrOrErr->back();
+  // } else {
+  //   auto AddrOrErr = MA.readUInt64s({Addr});
+  //   if (!AddrOrErr)
+  //     return AddrOrErr.takeError();
+  //   PtrValAddr = AddrOrErr->back();
+  // }
+  uint64_t PtrValAddr = Addr.getValue();
   if (PtrValAddr == 0)
     return std::make_unique<PointerValueBuffer>(Ty); // null pointer
 
@@ -459,6 +454,16 @@ ReaderDispatcher::ReaderDispatcher::readPointer(QualType Ty,
   return std::move(PtrBuf);
 }
 
+llvm::Expected<std::unique_ptr<ValueBuffer>>
+ReaderDispatcher::readOtherObject(QualType Ty, llvm::orc::ExecutorAddr Addr) {
+  unsigned PtrWidth = Ctx.getTypeSizeInChars(Ty).getQuantity();
+  uint64_t PtrValAddr = Addr.getValue();
+  if (PtrValAddr == 0)
+    return std::make_unique<PointerValueBuffer>(Ty); // null pointer
+
+  return std::make_unique<PointerValueBuffer>(Ty, PtrValAddr);
+}
+
 ValueResultManager::ValueResultManager(ASTContext &Ctx,
                                        llvm::orc::MemoryAccess &MA)
     : Ctx(Ctx), MemAcc(MA) {}
@@ -502,7 +507,7 @@ void ValueResultManager::deliverResult(SendResultFn SendResult, ValueId ID,
       SendResult(llvm::make_error<llvm::StringError>(
           "Unknown ValueId in deliverResult", llvm::inconvertibleErrorCode()));
     }
-    Ty = It->second;
+    Ty = It->second.getCanonicalType();
     IdToType.erase(It);
   }
 

>From 65638d3638633e9d5a7ba317f53483acb1f9ed9a Mon Sep 17 00:00:00 2001
From: SahilPatidar <patidarsahil2001 at gmail.com>
Date: Fri, 12 Sep 2025 20:38:40 +0530
Subject: [PATCH 5/5] Introduce new Value class design, inspired by APValue

---
 clang/include/clang/Interpreter/Interpreter.h |   2 +-
 clang/include/clang/Interpreter/Value.h       | 405 +++++++++++------
 clang/lib/Interpreter/Interpreter.cpp         |   7 +-
 .../Interpreter/InterpreterValuePrinter.cpp   | 301 +++++++------
 clang/lib/Interpreter/Value.cpp               | 407 +++++++-----------
 .../Interpreter/InterpreterExtensionsTest.cpp |   2 +-
 .../unittests/Interpreter/InterpreterTest.cpp | 199 +++++----
 7 files changed, 710 insertions(+), 613 deletions(-)

diff --git a/clang/include/clang/Interpreter/Interpreter.h b/clang/include/clang/Interpreter/Interpreter.h
index c1e7ca48c0961..3b2575964d40f 100644
--- a/clang/include/clang/Interpreter/Interpreter.h
+++ b/clang/include/clang/Interpreter/Interpreter.h
@@ -145,7 +145,7 @@ class Interpreter {
 
   llvm::Expected<PartialTranslationUnit &> Parse(llvm::StringRef Code);
   llvm::Error Execute(PartialTranslationUnit &T);
-  llvm::Error ParseAndExecute(llvm::StringRef Code);
+  llvm::Error ParseAndExecute(llvm::StringRef Code, Value *V = nullptr);
 
   /// Undo N previous incremental inputs.
   llvm::Error Undo(unsigned N = 1);
diff --git a/clang/include/clang/Interpreter/Value.h b/clang/include/clang/Interpreter/Value.h
index dda8c6bbf09aa..3da9f5769d98f 100644
--- a/clang/include/clang/Interpreter/Value.h
+++ b/clang/include/clang/Interpreter/Value.h
@@ -95,171 +95,302 @@ class QualType;
   X(double, Double)                                                            \
   X(long double, LongDouble)
 
-class REPL_EXTERNAL_VISIBILITY Value {
-  union Storage {
-#define X(type, name) type m_##name;
-    REPL_BUILTIN_TYPES
-#undef X
-    void *m_Ptr;
-    unsigned char m_RawBits[sizeof(long double) * 8]; // widest type
-  };
-
+class REPL_EXTERNAL_VISIBILITY Value final {
 public:
-  enum Kind {
+  enum BuiltinKind {
 #define X(type, name) K_##name,
     REPL_BUILTIN_TYPES
 #undef X
-
-        K_Void,
-    K_PtrOrObj,
-    K_Unspecified
+        K_Unspecified
   };
 
-  Value() = default;
-  Value(const Interpreter *In, void *Ty);
-  Value(const Value &RHS);
-  Value(Value &&RHS) noexcept;
-  Value &operator=(const Value &RHS);
-  Value &operator=(Value &&RHS) noexcept;
-  ~Value();
-
-  void printType(llvm::raw_ostream &Out) const;
-  void printData(llvm::raw_ostream &Out) const;
-  void print(llvm::raw_ostream &Out) const;
-  void dump() const;
-  void clear();
-
-  const ASTContext &getASTContext() const;
-  const Interpreter &getInterpreter() const;
-  QualType getType() const;
-
-  bool isValid() const { return ValueKind != K_Unspecified; }
-  bool isVoid() const { return ValueKind == K_Void; }
-  bool hasValue() const { return isValid() && !isVoid(); }
-  bool isManuallyAlloc() const { return IsManuallyAlloc; }
-  Kind getKind() const { return ValueKind; }
-  void setKind(Kind K) { ValueKind = K; }
-  void setOpaqueType(void *Ty) { OpaqueType = Ty; }
-
-  void *getPtr() const;
-  void setPtr(void *Ptr) { Data.m_Ptr = Ptr; }
-  void setRawBits(void *Ptr, unsigned NBits = sizeof(Storage));
-
-#define X(type, name)                                                          \
-  void set##name(type Val) { Data.m_##name = Val; }                            \
-  type get##name() const { return Data.m_##name; }
-  REPL_BUILTIN_TYPES
+private:
+  struct Builtins {
+  private:
+    BuiltinKind BK = K_Unspecified;
+    union {
+#define X(type, name) type m_##name;
+      REPL_BUILTIN_TYPES
 #undef X
+    };
 
-  /// \brief Get the value with cast.
-  //
-  /// Get the value cast to T. This is similar to reinterpret_cast<T>(value),
-  /// casting the value of builtins (except void), enums and pointers.
-  /// Values referencing an object are treated as pointers to the object.
-  template <typename T> T convertTo() const {
-    return convertFwd<T>::cast(*this);
-  }
-
-protected:
-  bool isPointerOrObjectType() const { return ValueKind == K_PtrOrObj; }
+  public:
+    Builtins() = default;
+    explicit Builtins(BuiltinKind BK) : BK(BK) {}
+    ~Builtins() {}
 
-  /// \brief Get to the value with type checking casting the underlying
-  /// stored value to T.
-  template <typename T> T as() const {
-    switch (ValueKind) {
-    default:
-      return T();
-#define X(type, name)                                                          \
-  case Value::K_##name:                                                        \
-    return (T)Data.m_##name;
-      REPL_BUILTIN_TYPES
-#undef X
+    void setKind(BuiltinKind K) {
+      assert(BK == K_Unspecified);
+      BK = K;
     }
+    BuiltinKind getKind() const { return BK; }
+#define X(type, name)                                                          \
+  void set##name(type Val) {                                                   \
+    assert(BK == K_Unspecified || BK == K_##name);                             \
+    m_##name = Val;                                                            \
+  }                                                                            \
+  type get##name() const {                                                     \
+    assert(BK == K_##name);                                                    \
+    return m_##name;                                                           \
   }
+    REPL_BUILTIN_TYPES
+#undef X
+  };
 
-  // Allow convertTo to be partially specialized.
-  template <typename T> struct convertFwd {
-    static T cast(const Value &V) {
-      if (V.isPointerOrObjectType())
-        return (T)(uintptr_t)V.as<void *>();
-      if (!V.isValid() || V.isVoid()) {
-        return T();
-      }
-      return V.as<T>();
+  struct ArrValue {
+    std::vector<Value> Elements;
+    uint64_t ArrSize;
+    ArrValue(uint64_t Size) : ArrSize(Size) {
+      Elements.reserve(ArrSize);
+      for (uint64_t I = 0; I < ArrSize; ++I)
+        Elements.emplace_back();
     }
   };
 
-  template <typename T> struct convertFwd<T *> {
-    static T *cast(const Value &V) {
-      if (V.isPointerOrObjectType())
-        return (T *)(uintptr_t)V.as<void *>();
-      return nullptr;
+  struct PtrValue {
+    uint64_t Addr = 0;
+    Value *Pointee; // optional for str
+    PtrValue(uint64_t Addr) : Addr(Addr), Pointee(new Value()) {}
+    ~PtrValue() {
+      if (Pointee != nullptr)
+        delete Pointee;
     }
   };
 
-  const Interpreter *Interp = nullptr;
-  void *OpaqueType = nullptr;
-  Storage Data;
-  Kind ValueKind = K_Unspecified;
-  bool IsManuallyAlloc = false;
-};
-
-template <> inline void *Value::as() const {
-  if (isPointerOrObjectType())
-    return Data.m_Ptr;
-  return (void *)as<uintptr_t>();
-}
+  struct StrValue {
+    std::string StringBuf;
+    StrValue(std::string str) : StringBuf(std::move(str)) {}
+    ~StrValue() = default;
+  };
 
-class ValueBuffer {
 public:
-  enum Kind { K_Builtin, K_Array, K_Pointer, K_Unknown };
-  QualType Ty;
-  Kind K;
-  ValueBuffer(Kind K = K_Unknown) : K(K) {}
-  virtual ~ValueBuffer() = default;
-  bool isUnknown() const { return K == K_Unknown; }
-  bool isBuiltin() const { return K == K_Builtin; }
-  bool isArray() const { return K == K_Array; }
-  bool isPointer() const { return K == K_Pointer; }
-  static bool classof(const ValueBuffer *) { return true; }
-};
+  using DataType =
+      llvm::AlignedCharArrayUnion<ArrValue, PtrValue, Builtins, StrValue>;
+  enum ValKind { K_Builtin, K_Array, K_Pointer, K_Str, K_None };
 
-class BuiltinValueBuffer;
-class ArrayValueBuffer;
-class PointerValueBuffer;
+private:
+  QualType Ty;
+  ValKind VKind = K_None;
+  DataType Data;
 
-class BuiltinValueBuffer : public ValueBuffer {
 public:
-  std::vector<uint8_t> raw;
-  BuiltinValueBuffer(QualType _Ty) : ValueBuffer(K_Builtin) { Ty = _Ty; }
-  template <typename T> T as() const {
+  Value() = default;
+  explicit Value(QualType Ty, ValKind K) : Ty(Ty), VKind(K) {}
+  Value(const Value &RHS);
+  Value(Value &&RHS) : Ty(RHS.Ty), VKind(RHS.VKind), Data(RHS.Data) {
+    RHS.VKind = K_None;
+  }
+
+  Value &operator=(const Value &RHS);
+  Value &operator=(Value &&RHS);
+
+  explicit Value(QualType QT, std::vector<uint8_t> Raw);
+
+  struct UninitArr {};
+
+  explicit Value(UninitArr, QualType QT, uint64_t ArrSize)
+      : Ty(QT), VKind(K_None) {
+    MakeArray(ArrSize);
+  }
+
+  explicit Value(QualType QT, uint64_t Addr) : Ty(QT), VKind(K_None) {
+    MakePointer(Addr);
+  }
+
+  explicit Value(QualType QT, const char *buf) : Ty(QT), VKind(K_None) {
+    MakeStr(buf);
+  }
+
+  ~Value() {
+    if (VKind != K_None)
+      destroy();
+  }
+
+  template <typename T> static T as(std::vector<uint8_t> &raw) {
     T v{};
     // assert(raw.size() >= sizeof(T) && "Buffer too small for type!");
     memcpy(&v, raw.data(), sizeof(T));
     return v;
   }
-  static bool classof(const ValueBuffer *B) { return B->isBuiltin(); }
-};
 
-class ArrayValueBuffer : public ValueBuffer {
-public:
-  std::vector<std::unique_ptr<ValueBuffer>> Elements;
-  ArrayValueBuffer(QualType EleTy) : ValueBuffer(K_Array) { Ty = EleTy; }
+  // ---- Kind checks ----
+  bool isUnknown() const { return VKind == K_None; }
+  bool isBuiltin() const { return VKind == K_Builtin; }
+  bool isArray() const { return VKind == K_Array; }
+  bool isPointer() const { return VKind == K_Pointer; }
+  bool isStr() const { return VKind == K_Str; }
+  ValKind getKind() const { return VKind; }
+  QualType getType() const { return Ty; }
+  bool isAbsent() const { return VKind == K_None; }
+  bool hasValue() const { return VKind != K_None; }
+  BuiltinKind getBuiltinKind() const {
+    if (isBuiltin())
+      return asBuiltin().getKind();
+    return BuiltinKind::K_Unspecified;
+  }
 
-  static bool classof(const ValueBuffer *B) { return B->isArray(); }
-};
+protected:
+  // ---- accessors ----
+  Builtins &asBuiltin() {
+    assert(isBuiltin() && "Not a builtin value");
+    return *((Builtins *)(char *)&Data);
+  }
+
+  const Builtins &asBuiltin() const {
+    return const_cast<Value *>(this)->asBuiltin();
+  }
+
+  ArrValue &asArray() {
+    assert(isArray() && "Not an array value");
+    return *((ArrValue *)(char *)&Data);
+  }
+
+  const ArrValue &asArray() const {
+    return const_cast<Value *>(this)->asArray();
+  }
+
+  PtrValue &asPointer() {
+    assert(isPointer() && "Not a pointer value");
+    return *((PtrValue *)(char *)&Data);
+  }
+
+  const PtrValue &asPointer() const {
+    return const_cast<Value *>(this)->asPointer();
+  }
+
+  StrValue &asStr() {
+    assert(isStr() && "Not a Str value");
+    return *((StrValue *)(char *)&Data);
+  }
+
+  const StrValue &asStr() const { return const_cast<Value *>(this)->asStr(); }
 
-class PointerValueBuffer : public ValueBuffer {
 public:
-  uint64_t Address = 0;
-  std::unique_ptr<ValueBuffer> Pointee; // optional, used only for char*
+  bool hasBuiltinThis(BuiltinKind K) const {
+    if (isBuiltin())
+      return asBuiltin().getKind() == K;
+    return false;
+  }
+
+  void setStrVal(const char *buf) {
+    assert(isStr() && "Not a Str");
+    asStr().StringBuf = buf;
+  }
+
+  StringRef getStrVal() {
+    assert(isStr() && "Not a Str");
+    return StringRef(asStr().StringBuf);
+  }
+
+  const StringRef getStrVal() const {
+    assert(isStr() && "Not a Str");
+    return StringRef(asStr().StringBuf);
+  }
+
+  uint64_t getArraySize() const { return asArray().ArrSize; }
+
+  uint64_t getArrayInitializedElts() const { return asArray().ArrSize; }
+
+  Value &getArrayInitializedElt(unsigned I) {
+    assert(isArray() && "Invalid accessor");
+    assert(I < getArrayInitializedElts() && "Index out of range");
+    return ((ArrValue *)(char *)&Data)->Elements[I];
+  }
+
+  const Value &getArrayInitializedElt(unsigned I) const {
+    return const_cast<Value *>(this)->getArrayInitializedElt(I);
+  }
+
+  bool HasPointee() const {
+    assert(isPointer() && "Invalid accessor");
+    return !(asPointer().Pointee->isAbsent());
+  }
+
+  Value &getPointerPointee() {
+    assert(isPointer() && "Invalid accessor");
+    return *asPointer().Pointee;
+  }
 
-  PointerValueBuffer(QualType _Ty, uint64_t Addr = 0)
-      : ValueBuffer(K_Pointer), Address(Addr) {
-    Ty = _Ty;
+  const Value &getPointerPointee() const {
+    return const_cast<Value *>(this)->getPointerPointee();
   }
 
-  static bool classof(const ValueBuffer *B) { return B->isPointer(); }
+  uint64_t getAddr() const { return asPointer().Addr; }
+
+#define X(type, name)                                                          \
+  void set##name(type Val) { asBuiltin().set##name(Val); }                     \
+  type get##name() const { return asBuiltin().get##name(); }
+  REPL_BUILTIN_TYPES
+#undef X
+
+  // ---- Printing ----
+  void printType(llvm::raw_ostream &Out, ASTContext &Ctx) const;
+  void printData(llvm::raw_ostream &Out, ASTContext &Ctx) const;
+  void print(llvm::raw_ostream &Out, ASTContext &Ctx) const;
+  void dump(ASTContext &Ctx) const;
+
+  // ---- clear ----
+  void clear() { destroy(); }
+
+private:
+  void MakeBuiltIns() {
+    assert(isAbsent() && "Bad state change");
+    new ((void *)(char *)&Data) Builtins(BuiltinKind::K_Unspecified);
+    VKind = K_Builtin;
+  }
+
+  void MakeArray(uint64_t Size) {
+    assert(isAbsent() && "Bad state change");
+    new ((void *)(char *)&Data) ArrValue(Size);
+    VKind = K_Array;
+  }
+
+  void MakePointer(uint64_t Addr = 0) {
+    assert(isAbsent() && "Bad state change");
+    new ((void *)(char *)&Data) PtrValue(Addr);
+    VKind = K_Pointer;
+  }
+
+  void MakeStr(std::string Str = "") {
+    assert(isAbsent() && "Bad state change");
+    new ((void *)(char *)&Data) StrValue(Str);
+    VKind = K_Str;
+  }
+
+  void setBuiltins(Builtins &LHS, const Builtins &RHS) {
+    switch (RHS.getKind()) {
+    default:
+      assert(false && "Type not supported");
+
+#define X(type, name)                                                          \
+  case BuiltinKind::K_##name: {                                                \
+    LHS.setKind(BuiltinKind::K_##name);                                        \
+    LHS.set##name(RHS.get##name());                                            \
+  } break;
+      REPL_BUILTIN_TYPES
+#undef X
+    }
+  }
+
+  void destroy() {
+    switch (VKind) {
+    case K_Builtin:
+      reinterpret_cast<Builtins *>(&Data)->~Builtins();
+      break;
+    case K_Array:
+      reinterpret_cast<ArrValue *>(&Data)->~ArrValue();
+      break;
+    case K_Pointer:
+      reinterpret_cast<PtrValue *>(&Data)->~PtrValue();
+      break;
+    case K_Str:
+      reinterpret_cast<StrValue *>(&Data)->~StrValue();
+      break;
+    default:
+      break;
+    }
+    VKind = K_None;
+  }
 };
 
 class ValueToString {
@@ -268,12 +399,13 @@ class ValueToString {
 
 public:
   ValueToString(ASTContext &Ctx) : Ctx(Ctx) {}
-  std::string toString(const ValueBuffer *);
+  std::string toString(const Value *);
+  std::string toString(QualType);
 
 private:
-  std::string BuiltinToString(const BuiltinValueBuffer &B);
-  std::string PointerToString(const PointerValueBuffer &P);
-  std::string ArrayToString(const ArrayValueBuffer &A);
+  std::string BuiltinToString(const Value &B);
+  std::string PointerToString(const Value &P);
+  std::string ArrayToString(const Value &A);
 };
 
 class ValueResultManager {
@@ -296,17 +428,16 @@ class ValueResultManager {
 
   void deliverResult(SendResultFn SendResult, ValueId ID,
                      llvm::orc::ExecutorAddr VAddr);
+  Value release() { return std::move(LastVal); }
 
 private:
   std::atomic<ValueId> NextID{1};
   void Initialize(llvm::orc::LLJIT &EE);
 
-  std::string ValueTypeToString(QualType QT) const;
-
   mutable std::mutex Mutex;
   ASTContext &Ctx;
   llvm::orc::MemoryAccess &MemAcc;
-  std::unique_ptr<ValueBuffer> ValBuf = nullptr;
+  Value LastVal;
   llvm::DenseMap<ValueId, clang::QualType> IdToType;
 };
 
diff --git a/clang/lib/Interpreter/Interpreter.cpp b/clang/lib/Interpreter/Interpreter.cpp
index 7915d005dc8f3..8e4173923b956 100644
--- a/clang/lib/Interpreter/Interpreter.cpp
+++ b/clang/lib/Interpreter/Interpreter.cpp
@@ -577,7 +577,7 @@ llvm::Error Interpreter::Execute(PartialTranslationUnit &T) {
   return llvm::Error::success();
 }
 
-llvm::Error Interpreter::ParseAndExecute(llvm::StringRef Code) {
+llvm::Error Interpreter::ParseAndExecute(llvm::StringRef Code, Value *V) {
 
   auto PTU = Parse(Code);
   if (!PTU)
@@ -587,7 +587,10 @@ llvm::Error Interpreter::ParseAndExecute(llvm::StringRef Code) {
       return Err;
 
   if (ValMgr) {
-    ValMgr->resetAndDump();
+    if (V) {
+      *V = ValMgr->release();
+    } else
+      ValMgr->resetAndDump();
   }
   return llvm::Error::success();
 }
diff --git a/clang/lib/Interpreter/InterpreterValuePrinter.cpp b/clang/lib/Interpreter/InterpreterValuePrinter.cpp
index 508ae0bf71d9f..b52929ab97660 100644
--- a/clang/lib/Interpreter/InterpreterValuePrinter.cpp
+++ b/clang/lib/Interpreter/InterpreterValuePrinter.cpp
@@ -154,85 +154,36 @@ static std::string FunctionToString(ASTContext &Ctx, QualType QT,
   return Str;
 }
 
-static std::string escapeString(const std::vector<uint8_t> &Raw) {
-  std::string Out;
-  for (char c : Raw) {
-    // switch (c) {
-    // case '\n':
-    //   Out += "\\n";
-    //   break;
-    // case '\t':
-    //   Out += "\\t";
-    //   break;
-    // case '\r':
-    //   Out += "\\r";
-    //   break;
-    // case '\"':
-    //   Out += "\\\"";
-    //   break;
-    // case '\\':
-    //   Out += "\\\\";
-    //   break;
-    // default:
-    if (std::isprint(static_cast<unsigned char>(c)))
-      Out.push_back(c);
-    else {
-      char buf[5];
-      snprintf(buf, sizeof(buf), "\\x%02X", static_cast<unsigned char>(c));
-      Out += buf;
-    }
-    // break;
-    // }
-  }
-  return Out;
-}
-
 namespace clang {
 
 std::string Interpreter::ValueDataToString(const Value &V) const { return ""; }
 
-std::string ValueToString::toString(const ValueBuffer *Buf) {
-  if (const BuiltinValueBuffer *B = llvm::dyn_cast<BuiltinValueBuffer>(Buf))
-    return BuiltinToString(*B);
-  else if (const ArrayValueBuffer *A = llvm::dyn_cast<ArrayValueBuffer>(Buf))
-    return ArrayToString(*A);
-  else if (const PointerValueBuffer *P =
-               llvm::dyn_cast<PointerValueBuffer>(Buf))
-    return PointerToString(*P);
+std::string ValueToString::toString(const Value *Buf) {
+
+  switch (Buf->getKind()) {
+  case Value::K_Builtin:
+    return BuiltinToString(*Buf);
+  case Value::K_Pointer:
+    return PointerToString(*Buf);
+  case Value::K_Str:
+    break;
+  case Value::K_Array:
+    return ArrayToString(*Buf);
+
+  default:
+    break;
+  }
   return "";
 }
 
-std::string ValueToString::BuiltinToString(const BuiltinValueBuffer &B) {
-  if (B.raw.empty())
+std::string ValueToString::BuiltinToString(const Value &B) {
+  if (!B.hasValue())
     return ""; // No data in buffer
 
-  QualType QT = B.Ty;
+  QualType QT = B.getType();
   QualType DesugaredTy = QT.getDesugaredType(Ctx);
   QualType NonRefTy = DesugaredTy.getNonReferenceType();
 
-  if (NonRefTy->isCharType()) {
-    unsigned char c = B.as<unsigned char>();
-    switch (c) {
-    // case '\n':
-    //   return "'\\n'";
-    // case '\t':
-    //   return "'\\t'";
-    // case '\r':
-    //   return "'\\r'";
-    // case '\'':
-    //   return "'\\''";
-    // case '\\':
-    //   return "'\\'";
-    case '\0':
-      return "";
-    default:
-      if (std::isprint(c))
-        return std::string("'") + static_cast<char>(c) + "'";
-      else {
-        return llvm::formatv("'\\x{0:02X}'", c).str();
-      }
-    }
-  }
   if (auto *BT = DesugaredTy.getCanonicalType()->getAs<BuiltinType>()) {
 
     auto formatFloating = [](auto Val, char Suffix = '\0') -> std::string {
@@ -264,52 +215,64 @@ std::string ValueToString::BuiltinToString(const BuiltinValueBuffer &B) {
       return "{ error: unknown builtin type '" + std::to_string(BT->getKind()) +
              " '}";
     case clang::BuiltinType::Bool:
-      SS << ((B.as<bool>()) ? "true" : "false");
+      SS << ((B.getBool()) ? "true" : "false");
+      return Str;
+    case clang::BuiltinType::Char_S:
+      SS << '\'' << B.getChar_S() << '\'';
+      return Str;
+    case clang::BuiltinType::SChar:
+      SS << '\'' << B.getSChar() << '\'';
+      return Str;
+    case clang::BuiltinType::Char_U:
+      SS << '\'' << B.getChar_U() << '\'';
+      return Str;
+    case clang::BuiltinType::UChar:
+      SS << '\'' << B.getUChar() << '\'';
       return Str;
     case clang::BuiltinType::Short:
-      SS << B.as<short>();
+      SS << B.getShort();
       return Str;
     case clang::BuiltinType::UShort:
-      SS << B.as<unsigned short>();
+      SS << B.getUShort();
       return Str;
     case clang::BuiltinType::Int:
-      SS << B.as<int>();
+      SS << B.getInt();
       return Str;
     case clang::BuiltinType::UInt:
-      SS << B.as<unsigned int>();
+      SS << B.getUInt();
       return Str;
     case clang::BuiltinType::Long:
-      SS << B.as<long>();
+      SS << B.getLong();
       return Str;
     case clang::BuiltinType::ULong:
-      SS << B.as<unsigned long>();
+      SS << B.getULong();
       return Str;
     case clang::BuiltinType::LongLong:
-      SS << B.as<long long>();
+      SS << B.getLongLong();
       return Str;
     case clang::BuiltinType::ULongLong:
-      SS << B.as<unsigned long long>();
+      SS << B.getULongLong();
       return Str;
     case clang::BuiltinType::Float:
-      return formatFloating(B.as<float>(), /*suffix=*/'f');
+      return formatFloating(B.getFloat(), /*suffix=*/'f');
 
     case clang::BuiltinType::Double:
-      return formatFloating(B.as<double>());
+      return formatFloating(B.getDouble());
 
     case clang::BuiltinType::LongDouble:
-      return formatFloating(B.as<long double>(), /*suffix=*/'L');
+      return formatFloating(B.getLongDouble(), /*suffix=*/'L');
     }
   }
 
   if (NonRefTy->isEnumeralType())
-    return EnumToString(Ctx, QT, B.as<uint64_t>());
+    return EnumToString(Ctx, QT, B.getUInt());
 
   return "";
 }
 
-std::string ValueToString::PointerToString(const PointerValueBuffer &P) {
+std::string ValueToString::PointerToString(const Value &P) {
 
-  QualType QT = P.Ty;
+  QualType QT = P.getType();
   QualType DesugaredTy = QT.getDesugaredType(Ctx);
   QualType NonRefTy = DesugaredTy.getNonReferenceType();
 
@@ -320,49 +283,45 @@ std::string ValueToString::PointerToString(const PointerValueBuffer &P) {
     auto PointeeTy = PtrTy->getPointeeType();
 
     // char* -> print string literal
-    if (PointeeTy->isCharType() && P.Pointee) {
-      if (auto *BE = static_cast<BuiltinValueBuffer *>(P.Pointee.get()))
-        return "\"" + escapeString(BE->raw) + "\"";
+    if (PointeeTy->isCharType() && P.HasPointee()) {
+      if (P.getPointerPointee().isStr())
+        return "\"" + P.getPointerPointee().getStrVal().str() + "\"";
     }
-
-    return std::to_string(P.Address);
   }
 
-  if (P.Address == 0)
-    return "nullptr";
-
   if ((NonRefTy->isPointerType() || NonRefTy->isMemberPointerType()) &&
       NonRefTy->getPointeeType()->isFunctionProtoType())
-    return FunctionToString(Ctx, QT, (void *)P.Address);
+    return FunctionToString(Ctx, QT, (void *)P.getAddr());
 
   if (NonRefTy->isFunctionType())
-    return FunctionToString(Ctx, QT, (void *)P.Address);
+    return FunctionToString(Ctx, QT, (void *)P.getAddr());
 
   if (NonRefTy->isNullPtrType())
     return "nullptr\n";
 
   std::ostringstream OS;
-  OS << "@0x" << std::hex << P.Address;
+  OS << "@0x" << std::hex << P.getAddr();
   return OS.str();
 }
 
-std::string ValueToString::ArrayToString(const ArrayValueBuffer &A) {
-  if (const ConstantArrayType *CAT = Ctx.getAsConstantArrayType(A.Ty)) {
+std::string ValueToString::ArrayToString(const Value &A) {
+  if (const ConstantArrayType *CAT = Ctx.getAsConstantArrayType(A.getType())) {
     QualType ElemTy = CAT->getElementType();
     // Treat null terminated char arrays as strings basically.
-    if (ElemTy->isCharType() && !A.Elements.empty()) {
-      if (const auto *B =
-              llvm::dyn_cast<BuiltinValueBuffer>(A.Elements.back().get())) {
-        char last = (char)B->raw.front();
+    if (ElemTy->isCharType()) {
+      const Value &LastV =
+          A.getArrayInitializedElt(A.getArrayInitializedElts() - 1);
+      if (LastV.hasValue() && !LastV.isAbsent() && LastV.isBuiltin()) {
+        char last = LastV.getChar_S();
         if (last != '\0')
           goto not_a_string;
       }
       std::string Res;
       Res += "\"";
-      for (size_t i = 0; i < A.Elements.size(); ++i) {
-        if (const auto *B =
-                llvm::dyn_cast<BuiltinValueBuffer>(A.Elements[i].get())) {
-          char c = static_cast<char>(B->raw.back());
+      for (size_t I = 0, N = A.getArraySize(); I < N; ++I) {
+        const Value &EleVal = A.getArrayInitializedElt(I);
+        if (EleVal.hasValue() && EleVal.isBuiltin()) {
+          char c = EleVal.getChar_S();
           if (c != '\0')
             Res += c;
         }
@@ -375,9 +334,12 @@ std::string ValueToString::ArrayToString(const ArrayValueBuffer &A) {
   std::ostringstream OS;
 
   OS << "{ ";
-  for (size_t i = 0; i < A.Elements.size(); ++i) {
-    OS << this->toString(A.Elements[i].get());
-    if (i + 1 < A.Elements.size())
+  for (size_t I = 0, N = A.getArraySize(); I < N; ++I) {
+    const Value &EleVal = A.getArrayInitializedElt(I);
+    if (EleVal.hasValue())
+      OS << this->toString(&EleVal);
+
+    if (I + 1 < N)
       OS << ", ";
   }
 
@@ -385,7 +347,7 @@ std::string ValueToString::ArrayToString(const ArrayValueBuffer &A) {
   return OS.str();
 }
 
-std::string ValueResultManager::ValueTypeToString(QualType QT) const {
+std::string ValueToString::toString(QualType QT) {
   ASTContext &AstCtx = const_cast<ASTContext &>(Ctx);
 
   std::string QTStr = QualTypeToString(AstCtx, QT);
@@ -397,16 +359,15 @@ std::string ValueResultManager::ValueTypeToString(QualType QT) const {
 }
 
 void ValueResultManager::resetAndDump() {
-  if (!ValBuf)
+  if (!LastVal.hasValue() || LastVal.isAbsent())
     return;
 
-  QualType Ty = ValBuf->Ty;
+  QualType Ty = LastVal.getType();
 
-  std::unique_ptr<ValueBuffer> Val = nullptr;
-  ValBuf.swap(Val);
+  Value V = std::move(LastVal);
 
   // Don't even try to print a void or an invalid type, it doesn't make sense.
-  if (Ty->isVoidType() || (!Val || (Val && Val->isUnknown())))
+  if (Ty->isVoidType())
     return;
 
   // We need to get all the results together then print it, since `printType` is
@@ -415,11 +376,12 @@ void ValueResultManager::resetAndDump() {
   llvm::raw_string_ostream SS(Str);
   ValueToString ValToStr(Ctx);
   SS << "(";
-  SS << ValueTypeToString(Ty);
+  SS << ValToStr.toString(Ty);
   SS << ") ";
-  SS << ValToStr.toString(Val.get());
+  SS << ValToStr.toString(&V);
   SS << "\n";
   llvm::outs() << Str;
+  V.clear();
 }
 
 llvm::Expected<llvm::orc::ExecutorAddr>
@@ -451,29 +413,52 @@ class ExprConverter {
 public:
   ExprConverter(Sema &S, ASTContext &Ctx) : S(S), Ctx(Ctx) {}
 
-  /// Create (&E) as a void*
+private:
+  bool isAddressOfExpr(Expr *E) {
+    if (!E)
+      return false;
+    if (auto *UO = dyn_cast<UnaryOperator>(E))
+      return UO->getOpcode() == UO_AddrOf;
+    if (auto *ICE = dyn_cast<ImplicitCastExpr>(E))
+      return isAddressOfExpr(ICE->getSubExpr());
+    return false;
+  }
+
+  /// Build a single &E using Sema.
+  ExprResult buildAddrOfWithSema(Expr *E,
+                                 SourceLocation Loc = SourceLocation()) {
+    // Sema will materialize temporaries as necessary.
+    ExprResult Res = S.CreateBuiltinUnaryOp(Loc, UO_AddrOf, E);
+    if (Res.isInvalid())
+      return ExprError();
+    return Res;
+  }
+
+public:
+  /// Create (&E) as a void* (uses Sema for & creation)
   ExprResult CreateAddressOfVoidPtrExpr(QualType Ty, Expr *ForCast,
                                         bool takeAddr = false) {
-    QualType VoidPtrTy = Ctx.getPointerType(Ctx.VoidTy);
+    ExprResult AddrOfRes = ForCast;
 
-    // &E
-    Expr *AddrOf = ForCast;
     if (takeAddr) {
-      AddrOf = UnaryOperator::Create(
-          Ctx, ForCast, UO_AddrOf, Ctx.getPointerType(Ty), VK_PRValue,
-          OK_Ordinary, SourceLocation(), false, FPOptionsOverride());
+      // don't create & twice
+      if (!isAddressOfExpr(ForCast)) {
+        AddrOfRes = buildAddrOfWithSema(ForCast);
+        if (AddrOfRes.isInvalid())
+          return ExprError();
+      } else {
+        // already an &-expression; keep it as-is
+        AddrOfRes = ForCast;
+      }
     }
 
     TypeSourceInfo *TSI = Ctx.getTrivialTypeSourceInfo(Ctx.VoidPtrTy);
-    ExprResult CastedExpr =
-        S.BuildCStyleCastExpr(SourceLocation(), TSI, SourceLocation(), AddrOf);
-    assert(!CastedExpr.isInvalid() && "Can not create cstyle cast expression");
-    return CastedExpr.get();
-    // static_cast<void*>(&E)
-    // return CXXStaticCastExpr::Create(
-    //     Ctx, VoidPtrTy, VK_PRValue, CK_BitCast, AddrOf, nullptr,
-    //     Ctx.getTrivialTypeSourceInfo(VoidPtrTy), FPOptionsOverride(),
-    //     SourceLocation(), SourceLocation(), SourceRange());
+    ExprResult CastedExpr = S.BuildCStyleCastExpr(
+        SourceLocation(), TSI, SourceLocation(), AddrOfRes.get());
+    if (CastedExpr.isInvalid())
+      return ExprError();
+
+    return CastedExpr;
   }
 
   /// Wrap rvalues in a temporary (var) so they become addressable.
@@ -494,7 +479,13 @@ class ExprConverter {
   }
 
   ExprResult handleEnumTypeExpr(const EnumType *, QualType QTy, Expr *E) {
-    return makeScalarAddressable(QTy, E);
+    uint64_t PtrBits = Ctx.getTypeSize(Ctx.VoidPtrTy);
+    QualType UIntTy = Ctx.getBitIntType(/*Unsigned=*/true, PtrBits);
+    TypeSourceInfo *TSI = Ctx.getTrivialTypeSourceInfo(UIntTy);
+    ExprResult CastedExpr =
+        S.BuildCStyleCastExpr(SourceLocation(), TSI, SourceLocation(), E);
+    assert(!CastedExpr.isInvalid() && "Cannot create cstyle cast expr");
+    return makeScalarAddressable(QTy, CastedExpr.get());
   }
 
   ExprResult handlePointerTypeExpr(const PointerType *, QualType QTy, Expr *E) {
@@ -524,12 +515,44 @@ class ExprConverter {
     return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/false);
   }
 
-  ExprResult handleAnyObjectExpr(const Type *, QualType QTy, Expr *E) {
+  ExprResult handleMemberPointerTypeExpr(const Type *, QualType QTy, Expr *E) {
     if (E->isLValue() || E->isXValue())
       return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/true);
     return CreateAddressOfVoidPtrExpr(QTy, CreateMaterializeTemporaryExpr(E),
                                       /*takeAddr=*/true);
   }
+
+  ExprResult handleRecordTypeExpr(const Type *, QualType QTy, Expr *E) {
+    if (E->isLValue() || E->isXValue())
+      return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/true);
+
+    TypeSourceInfo *TSI = Ctx.getTrivialTypeSourceInfo(QTy, SourceLocation());
+    ExprResult CXXNewCall =
+        S.BuildCXXNew(E->getSourceRange(),
+                      /*UseGlobal=*/true, /*PlacementLParen=*/SourceLocation(),
+                      MultiExprArg(),
+                      /*PlacementRParen=*/SourceLocation(),
+                      /*TypeIdParens=*/SourceRange(), TSI->getType(), TSI,
+                      std::nullopt, E->getSourceRange(), E);
+
+    if (CXXNewCall.isInvalid())
+      return ExprError();
+
+    auto CallRes = S.ActOnFinishFullExpr(CXXNewCall.get(),
+                                         /*DiscardedValue=*/false);
+    if (CallRes.isInvalid())
+      return ExprError();
+    return CreateAddressOfVoidPtrExpr(QTy, CallRes.get(), /*takeAddr=*/false);
+  }
+
+  ExprResult handleAnyObjectExpr(const Type *, QualType QTy, Expr *E) {
+    if (E->isLValue() || E->isXValue())
+      return CreateAddressOfVoidPtrExpr(QTy, E, /*takeAddr=*/true);
+    auto Res = S.CreateBuiltinUnaryOp(SourceLocation(), UO_AddrOf, E);
+    assert(!Res.isInvalid());
+    return CreateAddressOfVoidPtrExpr(QTy, Res.get(),
+                                      /*takeAddr=*/false);
+  }
 };
 
 class InterfaceKindVisitor : public TypeVisitor<InterfaceKindVisitor, bool> {
@@ -567,6 +590,18 @@ class InterfaceKindVisitor : public TypeVisitor<InterfaceKindVisitor, bool> {
     return true;
   }
 
+  bool VisitMemberPointerType(const MemberPointerType *Ty) {
+    Args.push_back(
+        Converter.handleMemberPointerTypeExpr(Ty, QualType(Ty, 0), E).get());
+    return true;
+  }
+
+  bool VisitRecordType(const RecordType *Ty) {
+    // Args.push_back(
+    //     Converter.handleRecordTypeExpr(Ty, QualType(Ty, 0), E).get());
+    return false;
+  }
+
   bool VisitConstantArrayType(const ConstantArrayType *Ty) {
     Args.push_back(Converter.handleArrayTypeExpr(Ty, QualType(Ty, 0), E).get());
     return true;
@@ -591,7 +626,7 @@ class InterfaceKindVisitor : public TypeVisitor<InterfaceKindVisitor, bool> {
   }
 };
 
-enum RunTimeFnTag { OrcSendResult, ClangSendResult };
+enum RunTimeFnTag { OrcSendResult, ClangSendResult, ClangDestroyObj };
 
 static constexpr llvm::StringRef RunTimeFnTagName[] = {
     "__orc_rt_SendResultValue", "__clang_Interpreter_SendResultValue"};
diff --git a/clang/lib/Interpreter/Value.cpp b/clang/lib/Interpreter/Value.cpp
index f3c89b620b505..438700afa98bd 100644
--- a/clang/lib/Interpreter/Value.cpp
+++ b/clang/lib/Interpreter/Value.cpp
@@ -112,173 +112,114 @@ class ValueStorage {
 
 namespace clang {
 
-static Value::Kind ConvertQualTypeToKind(const ASTContext &Ctx, QualType QT) {
-  if (Ctx.hasSameType(QT, Ctx.VoidTy))
-    return Value::K_Void;
-
-  if (const auto *ED = QT->getAsEnumDecl())
-    QT = ED->getIntegerType();
-
-  const auto *BT = QT->getAs<BuiltinType>();
-  if (!BT || BT->isNullPtrType())
-    return Value::K_PtrOrObj;
-
-  switch (QT->castAs<BuiltinType>()->getKind()) {
-  default:
-    assert(false && "Type not supported");
-    return Value::K_Unspecified;
-#define X(type, name)                                                          \
-  case BuiltinType::name:                                                      \
-    return Value::K_##name;
-    REPL_BUILTIN_TYPES
-#undef X
-  }
-}
-
-Value::Value(const Interpreter *In, void *Ty) : Interp(In), OpaqueType(Ty) {
-  const ASTContext &C = getASTContext();
-  setKind(ConvertQualTypeToKind(C, getType()));
-  if (ValueKind == K_PtrOrObj) {
-    QualType Canon = getType().getCanonicalType();
-    if ((Canon->isPointerType() || Canon->isObjectType() ||
-         Canon->isReferenceType()) &&
-        (Canon->isRecordType() || Canon->isConstantArrayType() ||
-         Canon->isMemberPointerType())) {
-      IsManuallyAlloc = true;
-      // Compile dtor function.
-      const Interpreter &Interp = getInterpreter();
-      void *DtorF = nullptr;
-      size_t ElementsSize = 1;
-      QualType DtorTy = getType();
-
-      if (const auto *ArrTy =
-              llvm::dyn_cast<ConstantArrayType>(DtorTy.getTypePtr())) {
-        DtorTy = ArrTy->getElementType();
-        llvm::APInt ArrSize(sizeof(size_t) * 8, 1);
-        do {
-          ArrSize *= ArrTy->getSize();
-          ArrTy = llvm::dyn_cast<ConstantArrayType>(
-              ArrTy->getElementType().getTypePtr());
-        } while (ArrTy);
-        ElementsSize = static_cast<size_t>(ArrSize.getZExtValue());
-      }
-      if (auto *CXXRD = DtorTy->getAsCXXRecordDecl()) {
-        if (llvm::Expected<llvm::orc::ExecutorAddr> Addr =
-                Interp.CompileDtorCall(CXXRD))
-          DtorF = reinterpret_cast<void *>(Addr->getValue());
-        else
-          llvm::logAllUnhandledErrors(Addr.takeError(), llvm::errs());
-      }
-
-      size_t AllocSize =
-          getASTContext().getTypeSizeInChars(getType()).getQuantity();
-      unsigned char *Payload =
-          ValueStorage::CreatePayload(DtorF, AllocSize, ElementsSize);
-      setPtr((void *)Payload);
+// static Value::Kind ConvertQualTypeToKind(const ASTContext &Ctx, QualType QT)
+// {
+//   if (Ctx.hasSameType(QT, Ctx.VoidTy))
+//     return Value::K_Void;
+
+//   if (const auto *ED = QT->getAsEnumDecl())
+//     QT = ED->getIntegerType();
+
+//   const auto *BT = QT->getAs<BuiltinType>();
+//   if (!BT || BT->isNullPtrType())
+//     return Value::K_PtrOrObj;
+
+//   switch (QT->castAs<BuiltinType>()->getKind()) {
+//   default:
+//     assert(false && "Type not supported");
+//     return Value::K_Unspecified;
+// #define X(type, name) \
+//   case BuiltinType::name: \
+//     return Value::K_##name;
+//     REPL_BUILTIN_TYPES
+// #undef X
+//   }
+// }
+
+Value::Value(const Value &RHS) : Ty(RHS.getType()), VKind(K_None) {
+  switch (RHS.getKind()) {
+  case K_None:
+    VKind = RHS.VKind;
+    break;
+  case K_Builtin: {
+    MakeBuiltIns();
+    if (RHS.asBuiltin().getKind() != BuiltinKind::K_Unspecified) {
+      setBuiltins(asBuiltin(), RHS.asBuiltin());
     }
+    break;
+  }
+  case K_Array: {
+    MakeArray(RHS.getArraySize());
+    for (uint64_t I = 0, N = RHS.getArraySize(); I < N; ++I)
+      getArrayInitializedElt(I) = RHS.getArrayInitializedElt(I);
+    break;
+  }
+  case K_Pointer: {
+    MakePointer(RHS.getAddr());
+    if (RHS.HasPointee())
+      getPointerPointee() = RHS.getPointerPointee();
+    break;
+  }
+  case K_Str:
+    MakeStr(RHS.getStrVal().str());
+    break;
   }
-}
-
-Value::Value(const Value &RHS)
-    : Interp(RHS.Interp), OpaqueType(RHS.OpaqueType), Data(RHS.Data),
-      ValueKind(RHS.ValueKind), IsManuallyAlloc(RHS.IsManuallyAlloc) {
-  if (IsManuallyAlloc)
-    ValueStorage::getFromPayload(getPtr())->Retain();
-}
-
-Value::Value(Value &&RHS) noexcept {
-  Interp = std::exchange(RHS.Interp, nullptr);
-  OpaqueType = std::exchange(RHS.OpaqueType, nullptr);
-  Data = RHS.Data;
-  ValueKind = std::exchange(RHS.ValueKind, K_Unspecified);
-  IsManuallyAlloc = std::exchange(RHS.IsManuallyAlloc, false);
-
-  if (IsManuallyAlloc)
-    ValueStorage::getFromPayload(getPtr())->Release();
 }
 
 Value &Value::operator=(const Value &RHS) {
-  if (IsManuallyAlloc)
-    ValueStorage::getFromPayload(getPtr())->Release();
-
-  Interp = RHS.Interp;
-  OpaqueType = RHS.OpaqueType;
-  Data = RHS.Data;
-  ValueKind = RHS.ValueKind;
-  IsManuallyAlloc = RHS.IsManuallyAlloc;
-
-  if (IsManuallyAlloc)
-    ValueStorage::getFromPayload(getPtr())->Retain();
+  if (this != &RHS)
+    *this = Value(RHS);
 
   return *this;
 }
 
-Value &Value::operator=(Value &&RHS) noexcept {
+Value &Value::operator=(Value &&RHS) {
   if (this != &RHS) {
-    if (IsManuallyAlloc)
-      ValueStorage::getFromPayload(getPtr())->Release();
-
-    Interp = std::exchange(RHS.Interp, nullptr);
-    OpaqueType = std::exchange(RHS.OpaqueType, nullptr);
-    ValueKind = std::exchange(RHS.ValueKind, K_Unspecified);
-    IsManuallyAlloc = std::exchange(RHS.IsManuallyAlloc, false);
+    if (VKind != K_None)
+      destroy();
 
+    Ty = RHS.Ty;
+    VKind = RHS.VKind;
     Data = RHS.Data;
+    RHS.VKind = K_None;
   }
-  return *this;
-}
 
-void Value::clear() {
-  if (IsManuallyAlloc)
-    ValueStorage::getFromPayload(getPtr())->Release();
-  ValueKind = K_Unspecified;
-  OpaqueType = nullptr;
-  Interp = nullptr;
-  IsManuallyAlloc = false;
-}
-
-Value::~Value() { clear(); }
-
-void *Value::getPtr() const {
-  assert(ValueKind == K_PtrOrObj);
-  return Data.m_Ptr;
-}
-
-void Value::setRawBits(void *Ptr, unsigned NBits /*= sizeof(Storage)*/) {
-  assert(NBits <= sizeof(Storage) && "Greater than the total size");
-  memcpy(/*dest=*/Data.m_RawBits, /*src=*/Ptr, /*nbytes=*/NBits / 8);
-}
-
-QualType Value::getType() const {
-  return QualType::getFromOpaquePtr(OpaqueType);
+  return *this;
 }
 
-const Interpreter &Value::getInterpreter() const {
-  assert(Interp != nullptr &&
-         "Can't get interpreter from a default constructed value");
-  return *Interp;
-}
+Value::Value(QualType QT, std::vector<uint8_t> Raw) : Ty(QT), VKind(K_None) {
+  MakeBuiltIns();
+  Builtins &B = asBuiltin();
+  if (const auto *ED = QT->getAsEnumDecl())
+    QT = ED->getIntegerType();
+  switch (QT->castAs<BuiltinType>()->getKind()) {
+  default:
+    assert(false && "Type not supported");
 
-const ASTContext &Value::getASTContext() const {
-  return getInterpreter().getASTContext();
+#define X(type, name)                                                          \
+  case BuiltinType::name: {                                                    \
+    B.setKind(BuiltinKind::K_##name);                                          \
+    B.set##name(as<type>(Raw));                                                \
+  } break;
+    REPL_BUILTIN_TYPES
+#undef X
+  }
 }
 
-void Value::dump() const { print(llvm::outs()); }
+void Value::dump(ASTContext &Ctx) const { print(llvm::outs(), Ctx); }
 
-void Value::printType(llvm::raw_ostream &Out) const {
-  // Out << Interp->ValueTypeToString(*this);
+void Value::printType(llvm::raw_ostream &Out, ASTContext &Ctx) const {
+  Out << ValueToString(Ctx).toString(getType());
 }
 
-void Value::printData(llvm::raw_ostream &Out) const {
-  Out << Interp->ValueDataToString(*this);
+void Value::printData(llvm::raw_ostream &Out, ASTContext &Ctx) const {
+  Out << ValueToString(Ctx).toString(this);
 }
 // FIXME: We do not support the multiple inheritance case where one of the base
 // classes has a pretty-printer and the other does not.
-void Value::print(llvm::raw_ostream &Out) const {
-  assert(OpaqueType != nullptr && "Can't print default Value");
-
+void Value::print(llvm::raw_ostream &Out, ASTContext &Ctx) const {
   // Don't even try to print a void or an invalid type, it doesn't make sense.
-  if (getType()->isVoidType() || !isValid())
+  if (getType()->isVoidType() || isAbsent())
     return;
 
   // We need to get all the results together then print it, since `printType` is
@@ -287,145 +228,97 @@ void Value::print(llvm::raw_ostream &Out) const {
   llvm::raw_string_ostream SS(Str);
 
   SS << "(";
-  printType(SS);
+  printType(SS, Ctx);
   SS << ") ";
-  printData(SS);
+  printData(SS, Ctx);
   SS << "\n";
   Out << Str;
 }
 
-class ReaderDispatcher {
+class ValueReaderDispatcher {
 private:
   ASTContext &Ctx;
   llvm::orc::MemoryAccess &MA;
 
 public:
-  ReaderDispatcher(ASTContext &Ctx, llvm::orc::MemoryAccess &MA)
+  ValueReaderDispatcher(ASTContext &Ctx, llvm::orc::MemoryAccess &MA)
       : Ctx(Ctx), MA(MA) {}
 
-  llvm::Expected<std::unique_ptr<ValueBuffer>>
-  read(QualType QT, llvm::orc::ExecutorAddr Addr);
-
-  llvm::Expected<std::unique_ptr<ValueBuffer>>
-  readBuiltin(QualType Ty, llvm::orc::ExecutorAddr Addr);
+  llvm::Expected<Value> read(QualType QT, llvm::orc::ExecutorAddr Addr);
 
-  llvm::Expected<std::unique_ptr<ValueBuffer>>
-  readPointer(QualType Ty, llvm::orc::ExecutorAddr Addr);
+  llvm::Expected<Value> readBuiltin(QualType Ty, llvm::orc::ExecutorAddr Addr);
 
-  llvm::Expected<std::unique_ptr<ValueBuffer>>
-  readArray(QualType Ty, llvm::orc::ExecutorAddr Addr);
+  llvm::Expected<Value> readPointer(QualType Ty, llvm::orc::ExecutorAddr Addr);
 
-  llvm::Expected<std::unique_ptr<ValueBuffer>>
-  readOtherObject(QualType Ty, llvm::orc::ExecutorAddr Addr);
+  llvm::Expected<Value> readArray(QualType Ty, llvm::orc::ExecutorAddr Addr);
 
+  llvm::Expected<Value> readOtherObject(QualType Ty,
+                                        llvm::orc::ExecutorAddr Addr);
   // TODO: record, function, etc.
 };
 
-class TypeReadVisitor
-    : public TypeVisitor<TypeReadVisitor,
-                         llvm::Expected<std::unique_ptr<ValueBuffer>>> {
-  ReaderDispatcher &Dispatcher;
+class ValueReadVisitor
+    : public TypeVisitor<ValueReadVisitor, llvm::Expected<Value>> {
+  ValueReaderDispatcher &Dispatcher;
   llvm::orc::ExecutorAddr Addr;
 
 public:
-  TypeReadVisitor(ReaderDispatcher &D, llvm::orc::ExecutorAddr A)
+  ValueReadVisitor(ValueReaderDispatcher &D, llvm::orc::ExecutorAddr A)
       : Dispatcher(D), Addr(A) {}
 
-  llvm::Expected<std::unique_ptr<ValueBuffer>> VisitType(const Type *T) {
+  llvm::Expected<Value> VisitType(const Type *T) {
     return Dispatcher.readOtherObject(QualType(T, 0), Addr);
   }
 
-  llvm::Expected<std::unique_ptr<ValueBuffer>>
-  VisitBuiltinType(const BuiltinType *BT) {
+  llvm::Expected<Value> VisitBuiltinType(const BuiltinType *BT) {
     return Dispatcher.readBuiltin(QualType(BT, 0), Addr);
   }
 
-  llvm::Expected<std::unique_ptr<ValueBuffer>>
-  VisitPointerType(const PointerType *PT) {
+  llvm::Expected<Value> VisitPointerType(const PointerType *PT) {
     return Dispatcher.readPointer(QualType(PT, 0), Addr);
   }
 
-  llvm::Expected<std::unique_ptr<ValueBuffer>>
-  VisitConstantArrayType(const ConstantArrayType *AT) {
+  llvm::Expected<Value> VisitConstantArrayType(const ConstantArrayType *AT) {
     return Dispatcher.readArray(QualType(AT, 0), Addr);
   }
 
-  llvm::Expected<std::unique_ptr<ValueBuffer>>
-  VisitEnumType(const EnumType *ET) {
+  llvm::Expected<Value> VisitEnumType(const EnumType *ET) {
     return Dispatcher.readBuiltin(QualType(ET, 0), Addr);
   }
 };
 
-llvm::Expected<std::unique_ptr<ValueBuffer>>
-ReaderDispatcher::read(QualType QT, llvm::orc::ExecutorAddr Addr) {
-  TypeReadVisitor V(*this, Addr);
+llvm::Expected<Value>
+ValueReaderDispatcher::read(QualType QT, llvm::orc::ExecutorAddr Addr) {
+  ValueReadVisitor V(*this, Addr);
   return V.Visit(QT.getTypePtr());
 }
 
-llvm::Expected<std::unique_ptr<ValueBuffer>>
-ReaderDispatcher::readBuiltin(QualType Ty, llvm::orc::ExecutorAddr Addr) {
+llvm::Expected<Value>
+ValueReaderDispatcher::readBuiltin(QualType Ty, llvm::orc::ExecutorAddr Addr) {
+  if (Ty->isVoidType())
+    return Value();
   auto Size = Ctx.getTypeSizeInChars(Ty).getQuantity();
   auto ResOrErr = MA.readBuffers({llvm::orc::ExecutorAddrRange(Addr, Size)});
   if (!ResOrErr)
     return ResOrErr.takeError();
 
-  auto Buf = std::make_unique<BuiltinValueBuffer>(Ty);
   const auto &Res = *ResOrErr;
-  std::vector<uint8_t> ElemBuf(Size);
-  std::memcpy(ElemBuf.data(), Res.back().data(), Size);
-  Buf->raw = std::move(ElemBuf);
-  return std::move(Buf);
-}
-
-llvm::Expected<std::unique_ptr<ValueBuffer>>
-ReaderDispatcher::readArray(QualType Ty, llvm::orc::ExecutorAddr Addr) {
-  const ConstantArrayType *CAT = Ctx.getAsConstantArrayType(Ty);
-  if (!CAT)
-    return llvm::make_error<llvm::StringError>("Not a ConstantArrayType",
-                                               llvm::inconvertibleErrorCode());
-
-  QualType ElemTy = CAT->getElementType();
-  size_t ElemSize = Ctx.getTypeSizeInChars(ElemTy).getQuantity();
-
-  auto Buf = std::make_unique<ArrayValueBuffer>(Ty);
-
-  for (size_t i = 0; i < CAT->getZExtSize(); ++i) {
-    auto ElemAddr = Addr + i * ElemSize;
-    auto ElemBufOrErr = read(ElemTy, ElemAddr);
-    if (!ElemBufOrErr)
-      return ElemBufOrErr.takeError();
-    Buf->Elements.push_back(std::move(*ElemBufOrErr));
-  }
-
-  return std::move(Buf);
+  return Value(Ty, Res.back());
 }
 
-llvm::Expected<std::unique_ptr<ValueBuffer>>
-ReaderDispatcher::ReaderDispatcher::readPointer(QualType Ty,
-                                                llvm::orc::ExecutorAddr Addr) {
+llvm::Expected<Value>
+ValueReaderDispatcher::readPointer(QualType Ty, llvm::orc::ExecutorAddr Addr) {
   auto PtrTy = dyn_cast<PointerType>(Ty.getTypePtr());
   if (!PtrTy)
     return llvm::make_error<llvm::StringError>("Not a PointerType",
                                                llvm::inconvertibleErrorCode());
-  // unsigned PtrWidth = Ctx.getTypeSizeInChars(Ty).getQuantity();
-  // uint64_t PtrValAddr = 0;
-  // if (PtrWidth == 32) {
-  //   auto AddrOrErr = MA.readUInt32s({Addr});
-  //   if (!AddrOrErr)
-  //     return AddrOrErr.takeError();
-  //   PtrValAddr = AddrOrErr->back();
-  // } else {
-  //   auto AddrOrErr = MA.readUInt64s({Addr});
-  //   if (!AddrOrErr)
-  //     return AddrOrErr.takeError();
-  //   PtrValAddr = AddrOrErr->back();
-  // }
+
   uint64_t PtrValAddr = Addr.getValue();
   if (PtrValAddr == 0)
-    return std::make_unique<PointerValueBuffer>(Ty); // null pointer
+    return Value(Ty, PtrValAddr); // null pointer
 
   llvm::orc::ExecutorAddr PointeeAddr(PtrValAddr);
-  auto PtrBuf = std::make_unique<PointerValueBuffer>(Ty, PtrValAddr);
+  Value Val(Ty, PtrValAddr);
 
   QualType PointeeTy = PtrTy->getPointeeType();
   if (PointeeTy->isCharType()) {
@@ -439,29 +332,57 @@ ReaderDispatcher::ReaderDispatcher::readPointer(QualType Ty,
         break;
       S.push_back(c);
     }
-    auto Buf = std::make_unique<BuiltinValueBuffer>(PointeeTy);
-    Buf->raw.assign(S.begin(), S.end());
-    if (S.empty())
-      Buf->raw.push_back('\0'); // represent ""
-    PtrBuf->Pointee = std::move(Buf);
+    Value Str(PointeeTy, S.c_str());
+    Val.getPointerPointee() = std::move(Str);
   }
-  // else {
-  //   auto BufOrErr = read(PointeeTy, PointeeAddr);
-  //   if (!BufOrErr)
-  //     return BufOrErr.takeError();
-  //   PtrBuf->Pointee = std::move(*BufOrErr);
-  // }
-  return std::move(PtrBuf);
+
+  return std::move(Val);
 }
 
-llvm::Expected<std::unique_ptr<ValueBuffer>>
-ReaderDispatcher::readOtherObject(QualType Ty, llvm::orc::ExecutorAddr Addr) {
-  unsigned PtrWidth = Ctx.getTypeSizeInChars(Ty).getQuantity();
-  uint64_t PtrValAddr = Addr.getValue();
-  if (PtrValAddr == 0)
-    return std::make_unique<PointerValueBuffer>(Ty); // null pointer
+llvm::Expected<Value>
+ValueReaderDispatcher::readArray(QualType Ty, llvm::orc::ExecutorAddr Addr) {
+  const ConstantArrayType *CAT = Ctx.getAsConstantArrayType(Ty);
+  if (!CAT)
+    return llvm::make_error<llvm::StringError>("Not a ConstantArrayType",
+                                               llvm::inconvertibleErrorCode());
+
+  QualType ElemTy = CAT->getElementType();
+  size_t ElemSize = Ctx.getTypeSizeInChars(ElemTy).getQuantity();
+
+  Value Val(Value::UninitArr(), Ty, CAT->getZExtSize());
+  for (size_t i = 0; i < CAT->getZExtSize(); ++i) {
+    auto ElemAddr = Addr + i * ElemSize;
+    if (ElemTy->isPointerType()) {
+      auto BufOrErr = MA.readUInt64s({ElemAddr});
+      if (!BufOrErr)
+        return BufOrErr.takeError();
+      llvm::orc::ExecutorAddr Addr(BufOrErr->back());
+      ElemAddr = Addr;
+    }
 
-  return std::make_unique<PointerValueBuffer>(Ty, PtrValAddr);
+    auto ElemBufOrErr = read(ElemTy, ElemAddr);
+    if (!ElemBufOrErr)
+      return ElemBufOrErr.takeError();
+    Val.getArrayInitializedElt(i) = std::move(*ElemBufOrErr);
+  }
+
+  return std::move(Val);
+}
+
+llvm::Expected<Value>
+ValueReaderDispatcher::readOtherObject(QualType Ty,
+                                       llvm::orc::ExecutorAddr Addr) {
+  llvm::outs() << Addr.getValue();
+  if (Ty->isRecordType()) {
+    llvm::outs() << "Here in recordtype\n";
+    auto BufOrErr = MA.readUInt64s({Addr});
+    if (!BufOrErr)
+      return BufOrErr.takeError();
+    Addr = llvm::orc::ExecutorAddr(BufOrErr->back());
+  }
+  uint64_t PtrValAddr = Addr.getValue();
+  llvm::outs() << PtrValAddr;
+  return Value(Ty, PtrValAddr);
 }
 
 ValueResultManager::ValueResultManager(ASTContext &Ctx,
@@ -511,18 +432,16 @@ void ValueResultManager::deliverResult(SendResultFn SendResult, ValueId ID,
     IdToType.erase(It);
   }
 
-  ReaderDispatcher Runner(Ctx, MemAcc);
+  ValueReaderDispatcher Runner(Ctx, MemAcc);
   auto BufOrErr = Runner.read(Ty, Addr);
 
-  ValBuf.reset();
   if (!BufOrErr) {
     SendResult(BufOrErr.takeError());
     return;
   }
 
   // Store the successfully read value buffer
-  ValBuf.swap(*BufOrErr);
-
+  LastVal = std::move(*BufOrErr);
   SendResult(llvm::Error::success());
   return;
 }
diff --git a/clang/unittests/Interpreter/InterpreterExtensionsTest.cpp b/clang/unittests/Interpreter/InterpreterExtensionsTest.cpp
index f50f6e320776d..1ae96e101b50d 100644
--- a/clang/unittests/Interpreter/InterpreterExtensionsTest.cpp
+++ b/clang/unittests/Interpreter/InterpreterExtensionsTest.cpp
@@ -100,7 +100,7 @@ TEST_F(InterpreterExtensionsTest, FindRuntimeInterface) {
   Value V1;
   llvm::cantFail(I.ParseAndExecute("int x = 42;"));
   llvm::cantFail(I.ParseAndExecute("x", &V1));
-  EXPECT_FALSE(V1.isValid());
+  EXPECT_TRUE(V1.isAbsent());
   EXPECT_FALSE(V1.hasValue());
 }
 
diff --git a/clang/unittests/Interpreter/InterpreterTest.cpp b/clang/unittests/Interpreter/InterpreterTest.cpp
index 9ff9092524d21..765b834f07070 100644
--- a/clang/unittests/Interpreter/InterpreterTest.cpp
+++ b/clang/unittests/Interpreter/InterpreterTest.cpp
@@ -241,66 +241,66 @@ TEST_F(InterpreterTest, FindMangledNameSymbol) {
 #endif // _WIN32
 }
 
-static Value AllocateObject(TypeDecl *TD, Interpreter &Interp) {
-  std::string Name = TD->getQualifiedNameAsString();
-  Value Addr;
-  // FIXME: Consider providing an option in clang::Value to take ownership of
-  // the memory created from the interpreter.
-  // cantFail(Interp.ParseAndExecute("new " + Name + "()", &Addr));
-
-  // The lifetime of the temporary is extended by the clang::Value.
-  cantFail(Interp.ParseAndExecute(Name + "()", &Addr));
-  return Addr;
-}
-
-static NamedDecl *LookupSingleName(Interpreter &Interp, const char *Name) {
-  Sema &SemaRef = Interp.getCompilerInstance()->getSema();
-  ASTContext &C = SemaRef.getASTContext();
-  DeclarationName DeclName = &C.Idents.get(Name);
-  LookupResult R(SemaRef, DeclName, SourceLocation(), Sema::LookupOrdinaryName);
-  SemaRef.LookupName(R, SemaRef.TUScope);
-  assert(!R.empty());
-  return R.getFoundDecl();
-}
-
-TEST_F(InterpreterTest, InstantiateTemplate) {
-  // FIXME: We cannot yet handle delayed template parsing. If we run with
-  // -fdelayed-template-parsing we try adding the newly created decl to the
-  // active PTU which causes an assert.
-  std::vector<const char *> Args = {"-fno-delayed-template-parsing"};
-  std::unique_ptr<Interpreter> Interp = createInterpreter(Args);
-
-  llvm::cantFail(Interp->Parse("extern \"C\" int printf(const char*,...);"
-                               "class A {};"
-                               "struct B {"
-                               "  template<typename T>"
-                               "  static int callme(T) { return 42; }"
-                               "};"));
-  auto &PTU = llvm::cantFail(Interp->Parse("auto _t = &B::callme<A*>;"));
-  auto PTUDeclRange = PTU.TUPart->decls();
-  EXPECT_EQ(1, std::distance(PTUDeclRange.begin(), PTUDeclRange.end()));
-
-  // Lower the PTU
-  if (llvm::Error Err = Interp->Execute(PTU)) {
-    // We cannot execute on the platform.
-    consumeError(std::move(Err));
-    return;
-  }
-
-  TypeDecl *TD = cast<TypeDecl>(LookupSingleName(*Interp, "A"));
-  Value NewA = AllocateObject(TD, *Interp);
-
-  // Find back the template specialization
-  VarDecl *VD = static_cast<VarDecl *>(*PTUDeclRange.begin());
-  UnaryOperator *UO = llvm::cast<UnaryOperator>(VD->getInit());
-  NamedDecl *TmpltSpec = llvm::cast<DeclRefExpr>(UO->getSubExpr())->getDecl();
-
-  std::string MangledName = MangleName(TmpltSpec);
-  typedef int (*TemplateSpecFn)(void *);
-  auto fn =
-      cantFail(Interp->getSymbolAddress(MangledName)).toPtr<TemplateSpecFn>();
-  EXPECT_EQ(42, fn(NewA.getPtr()));
-}
+// static Value AllocateObject(TypeDecl *TD, Interpreter &Interp) {
+//   std::string Name = TD->getQualifiedNameAsString();
+//   Value Addr;
+//   // FIXME: Consider providing an option in clang::Value to take ownership of
+//   // the memory created from the interpreter.
+//   // cantFail(Interp.ParseAndExecute("new " + Name + "()", &Addr));
+
+//   // The lifetime of the temporary is extended by the clang::Value.
+//   cantFail(Interp.ParseAndExecute(Name + "()", &Addr));
+//   return Addr;
+// }
+
+// static NamedDecl *LookupSingleName(Interpreter &Interp, const char *Name) {
+//   Sema &SemaRef = Interp.getCompilerInstance()->getSema();
+//   ASTContext &C = SemaRef.getASTContext();
+//   DeclarationName DeclName = &C.Idents.get(Name);
+//   LookupResult R(SemaRef, DeclName, SourceLocation(), Sema::LookupOrdinaryName);
+//   SemaRef.LookupName(R, SemaRef.TUScope);
+//   assert(!R.empty());
+//   return R.getFoundDecl();
+// }
+
+// TEST_F(InterpreterTest, InstantiateTemplate) {
+//   // FIXME: We cannot yet handle delayed template parsing. If we run with
+//   // -fdelayed-template-parsing we try adding the newly created decl to the
+//   // active PTU which causes an assert.
+//   std::vector<const char *> Args = {"-fno-delayed-template-parsing"};
+//   std::unique_ptr<Interpreter> Interp = createInterpreter(Args);
+
+//   llvm::cantFail(Interp->Parse("extern \"C\" int printf(const char*,...);"
+//                                "class A {};"
+//                                "struct B {"
+//                                "  template<typename T>"
+//                                "  static int callme(T) { return 42; }"
+//                                "};"));
+//   auto &PTU = llvm::cantFail(Interp->Parse("auto _t = &B::callme<A*>;"));
+//   auto PTUDeclRange = PTU.TUPart->decls();
+//   EXPECT_EQ(1, std::distance(PTUDeclRange.begin(), PTUDeclRange.end()));
+
+//   // Lower the PTU
+//   if (llvm::Error Err = Interp->Execute(PTU)) {
+//     // We cannot execute on the platform.
+//     consumeError(std::move(Err));
+//     return;
+//   }
+
+//   TypeDecl *TD = cast<TypeDecl>(LookupSingleName(*Interp, "A"));
+//   Value NewA = AllocateObject(TD, *Interp);
+
+//   // Find back the template specialization
+//   VarDecl *VD = static_cast<VarDecl *>(*PTUDeclRange.begin());
+//   UnaryOperator *UO = llvm::cast<UnaryOperator>(VD->getInit());
+//   NamedDecl *TmpltSpec = llvm::cast<DeclRefExpr>(UO->getSubExpr())->getDecl();
+
+//   std::string MangledName = MangleName(TmpltSpec);
+//   typedef int (*TemplateSpecFn)(void *);
+//   auto fn =
+//       cantFail(Interp->getSymbolAddress(MangledName)).toPtr<TemplateSpecFn>();
+//   EXPECT_EQ(42, fn((void *)NewA.getAddr()));
+// }
 
 TEST_F(InterpreterTest, Value) {
   std::vector<const char *> Args = {"-fno-sized-deallocation"};
@@ -309,40 +309,53 @@ TEST_F(InterpreterTest, Value) {
   Value V1;
   llvm::cantFail(Interp->ParseAndExecute("int x = 42;"));
   llvm::cantFail(Interp->ParseAndExecute("x", &V1));
-  EXPECT_TRUE(V1.isValid());
+  EXPECT_FALSE(V1.isAbsent());
   EXPECT_TRUE(V1.hasValue());
+  EXPECT_TRUE(V1.isBuiltin());
   EXPECT_EQ(V1.getInt(), 42);
-  EXPECT_EQ(V1.convertTo<int>(), 42);
   EXPECT_TRUE(V1.getType()->isIntegerType());
-  EXPECT_EQ(V1.getKind(), Value::K_Int);
-  EXPECT_FALSE(V1.isManuallyAlloc());
+  EXPECT_EQ(V1.getBuiltinKind(), Value::K_Int);
+
+  Value V1c;
+  llvm::cantFail(Interp->ParseAndExecute("int arr[2] = {42, 24};"));
+  llvm::cantFail(Interp->ParseAndExecute("arr", &V1c));
+  EXPECT_FALSE(V1c.isAbsent());
+  EXPECT_TRUE(V1c.hasValue());
+  EXPECT_TRUE(V1c.isArray());
+  EXPECT_FALSE(V1c.getArrayInitializedElt(0).isAbsent());
+  EXPECT_TRUE(V1c.getArrayInitializedElt(0).hasValue());
+  EXPECT_TRUE(V1c.getArrayInitializedElt(0).isBuiltin());
+  EXPECT_EQ(V1c.getArrayInitializedElt(0).getInt(), 42);
+  EXPECT_FALSE(V1c.getArrayInitializedElt(1).isAbsent());
+  EXPECT_TRUE(V1c.getArrayInitializedElt(1).hasValue());
+  EXPECT_TRUE(V1c.getArrayInitializedElt(1).isBuiltin());
+  EXPECT_EQ(V1c.getArrayInitializedElt(1).getInt(), 24);
+  EXPECT_TRUE(V1c.getType()->isConstantArrayType());
 
   Value V1b;
   llvm::cantFail(Interp->ParseAndExecute("char c = 42;"));
   llvm::cantFail(Interp->ParseAndExecute("c", &V1b));
-  EXPECT_TRUE(V1b.getKind() == Value::K_Char_S ||
-              V1b.getKind() == Value::K_Char_U);
+  EXPECT_TRUE(V1b.isBuiltin());
+  EXPECT_TRUE(V1b.getBuiltinKind() == Value::K_Char_S ||
+              V1b.getBuiltinKind() == Value::K_Char_U);
 
   Value V2;
   llvm::cantFail(Interp->ParseAndExecute("double y = 3.14;"));
   llvm::cantFail(Interp->ParseAndExecute("y", &V2));
-  EXPECT_TRUE(V2.isValid());
+  EXPECT_FALSE(V2.isAbsent());
   EXPECT_TRUE(V2.hasValue());
   EXPECT_EQ(V2.getDouble(), 3.14);
-  EXPECT_EQ(V2.convertTo<double>(), 3.14);
   EXPECT_TRUE(V2.getType()->isFloatingType());
-  EXPECT_EQ(V2.getKind(), Value::K_Double);
-  EXPECT_FALSE(V2.isManuallyAlloc());
+  EXPECT_EQ(V2.getBuiltinKind(), Value::K_Double);
 
-  Value V3;
-  llvm::cantFail(Interp->ParseAndExecute(
-      "struct S { int* p; S() { p = new int(42); } ~S() { delete p; }};"));
-  llvm::cantFail(Interp->ParseAndExecute("S{}", &V3));
-  EXPECT_TRUE(V3.isValid());
-  EXPECT_TRUE(V3.hasValue());
-  EXPECT_TRUE(V3.getType()->isRecordType());
-  EXPECT_EQ(V3.getKind(), Value::K_PtrOrObj);
-  EXPECT_TRUE(V3.isManuallyAlloc());
+  // Value V3;
+  // llvm::cantFail(Interp->ParseAndExecute(
+  //     "struct S { int* p; S() { p = new int(42); } ~S() { delete p; }};"));
+  // llvm::cantFail(Interp->ParseAndExecute("S{}", &V3));
+  // EXPECT_FALSE(V3.isAbsent());
+  // EXPECT_TRUE(V3.hasValue());
+  // EXPECT_TRUE(V3.getType()->isRecordType());
+  // EXPECT_TRUE(V3.isPointer());
 
   Value V4;
   llvm::cantFail(Interp->ParseAndExecute("int getGlobal();"));
@@ -365,28 +378,24 @@ TEST_F(InterpreterTest, Value) {
   Value V6;
   llvm::cantFail(Interp->ParseAndExecute("void foo() {}"));
   llvm::cantFail(Interp->ParseAndExecute("foo()", &V6));
-  EXPECT_TRUE(V6.isValid());
+  EXPECT_TRUE(V6.isAbsent());
   EXPECT_FALSE(V6.hasValue());
-  EXPECT_TRUE(V6.getType()->isVoidType());
-  EXPECT_EQ(V6.getKind(), Value::K_Void);
-  EXPECT_FALSE(V2.isManuallyAlloc());
+  // EXPECT_TRUE(V6.getType()->isVoidType());
 
   Value V7;
   llvm::cantFail(Interp->ParseAndExecute("foo", &V7));
-  EXPECT_TRUE(V7.isValid());
+  EXPECT_FALSE(V7.isAbsent());
   EXPECT_TRUE(V7.hasValue());
   EXPECT_TRUE(V7.getType()->isFunctionProtoType());
-  EXPECT_EQ(V7.getKind(), Value::K_PtrOrObj);
-  EXPECT_FALSE(V7.isManuallyAlloc());
+  EXPECT_TRUE(V7.isPointer());
 
   Value V8;
   llvm::cantFail(Interp->ParseAndExecute("struct SS{ void f() {} };"));
   llvm::cantFail(Interp->ParseAndExecute("&SS::f", &V8));
-  EXPECT_TRUE(V8.isValid());
+  EXPECT_FALSE(V8.isAbsent());
   EXPECT_TRUE(V8.hasValue());
   EXPECT_TRUE(V8.getType()->isMemberFunctionPointerType());
-  EXPECT_EQ(V8.getKind(), Value::K_PtrOrObj);
-  EXPECT_TRUE(V8.isManuallyAlloc());
+  EXPECT_TRUE(V8.isPointer());
 
   Value V9;
   llvm::cantFail(Interp->ParseAndExecute("struct A { virtual int f(); };"));
@@ -394,30 +403,30 @@ TEST_F(InterpreterTest, Value) {
       Interp->ParseAndExecute("struct B : A { int f() { return 42; }};"));
   llvm::cantFail(Interp->ParseAndExecute("int (B::*ptr)() = &B::f;"));
   llvm::cantFail(Interp->ParseAndExecute("ptr", &V9));
-  EXPECT_TRUE(V9.isValid());
+  EXPECT_FALSE(V9.isAbsent());
   EXPECT_TRUE(V9.hasValue());
   EXPECT_TRUE(V9.getType()->isMemberFunctionPointerType());
-  EXPECT_EQ(V9.getKind(), Value::K_PtrOrObj);
-  EXPECT_TRUE(V9.isManuallyAlloc());
+  EXPECT_TRUE(V9.isPointer());
 
   Value V10;
   llvm::cantFail(Interp->ParseAndExecute(
       "enum D : unsigned int {Zero = 0, One}; One", &V10));
 
+  EXPECT_FALSE(V10.getBuiltinKind() == Value::K_Unspecified);
   std::string prettyType;
   llvm::raw_string_ostream OSType(prettyType);
-  V10.printType(OSType);
+  V10.printType(OSType, Interp->getASTContext());
   EXPECT_STREQ(prettyType.c_str(), "D");
 
   // FIXME: We should print only the value or the constant not the type.
   std::string prettyData;
   llvm::raw_string_ostream OSData(prettyData);
-  V10.printData(OSData);
+  V10.printData(OSData, Interp->getASTContext());
   EXPECT_STREQ(prettyData.c_str(), "(One) : unsigned int 1");
 
   std::string prettyPrint;
   llvm::raw_string_ostream OSPrint(prettyPrint);
-  V10.print(OSPrint);
+  V10.print(OSPrint, Interp->getASTContext());
   EXPECT_STREQ(prettyPrint.c_str(), "(D) (One) : unsigned int 1\n");
 }
 



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