Merging r195092:

------------------------------------------------------------------------
r195092 | ributzka | 2013-11-18 19:08:35 -0800 (Mon, 18 Nov 2013) | 5 lines

[weak vtables] Place class definitions into anonymous namespaces to prevent weak vtables.

This patch places class definitions in implementation files into anonymous
namespaces to prevent weak vtables. This eliminates the need of providing an
out-of-line definition to pin the vtable explicitly to the file.
------------------------------------------------------------------------


git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@195111 91177308-0d34-0410-b5e6-96231b3b80d8

14 files changed, 80 insertions, 155 deletions

diff --git a/examples/ExceptionDemo/ExceptionDemo.cpp b/examples/ExceptionDemo/ExceptionDemo.cpp
index 6a0d0d0..d6954e8 100644
--- a/examples/ExceptionDemo/ExceptionDemo.cpp
+++ b/examples/ExceptionDemo/ExceptionDemo.cpp
@@ -1562,7 +1562,7 @@ llvm::Function *createUnwindExceptionTest(llvm::Module &module,
   return(outerCatchFunct);
 }
 
-
+namespace {
 /// Represents our foreign exceptions
 class OurCppRunException : public std::runtime_error {
 public:
@@ -1577,11 +1577,9 @@ public:
                                  std::runtime_error::operator=(toCopy)));
   }
 
-  ~OurCppRunException (void) throw ();
+  virtual ~OurCppRunException (void) throw () {}
 };
-
-// Provide out-of-line definition to prevent weak vtable.
-OurCppRunException::~OurCppRunException() throw () {}
+} // end anonymous namespace
 
 /// Throws foreign C++ exception.
 /// @param ignoreIt unused parameter that allows function to match implied
diff --git a/examples/Kaleidoscope/Chapter2/toy.cpp b/examples/Kaleidoscope/Chapter2/toy.cpp
index 99ec90e..cd90139 100644
--- a/examples/Kaleidoscope/Chapter2/toy.cpp
+++ b/examples/Kaleidoscope/Chapter2/toy.cpp
@@ -75,18 +75,17 @@ static int gettok() {
 //===----------------------------------------------------------------------===//
 // Abstract Syntax Tree (aka Parse Tree)
 //===----------------------------------------------------------------------===//
-
+namespace {
 /// ExprAST - Base class for all expression nodes.
 class ExprAST {
 public:
-  virtual ~ExprAST();
+  virtual ~ExprAST() {}
 };
 
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
 public:
   NumberExprAST(double val) {}
-  virtual ~NumberExprAST();
 };
 
 /// VariableExprAST - Expression class for referencing a variable, like "a".
@@ -94,14 +93,12 @@ class VariableExprAST : public ExprAST {
   std::string Name;
 public:
   VariableExprAST(const std::string &name) : Name(name) {}
-  virtual ~VariableExprAST();
 };
 
 /// BinaryExprAST - Expression class for a binary operator.
 class BinaryExprAST : public ExprAST {
 public:
   BinaryExprAST(char op, ExprAST *lhs, ExprAST *rhs) {}
-  virtual ~BinaryExprAST();
 };
 
 /// CallExprAST - Expression class for function calls.
@@ -111,16 +108,8 @@ class CallExprAST : public ExprAST {
 public:
   CallExprAST(const std::string &callee, std::vector<ExprAST*> &args)
     : Callee(callee), Args(args) {}
-  virtual ~CallExprAST();
 };
 
-// Provide out-of-line definitions to prevent weak vtables.
-ExprAST::~ExprAST() {}
-NumberExprAST::~NumberExprAST() {}
-VariableExprAST::~VariableExprAST() {}
-BinaryExprAST::~BinaryExprAST() {}
-CallExprAST::~CallExprAST() {}
-
 /// PrototypeAST - This class represents the "prototype" for a function,
 /// which captures its name, and its argument names (thus implicitly the number
 /// of arguments the function takes).
@@ -138,6 +127,7 @@ class FunctionAST {
 public:
   FunctionAST(PrototypeAST *proto, ExprAST *body) {}
 };
+} // end anonymous namespace
 
 //===----------------------------------------------------------------------===//
 // Parser
@@ -169,7 +159,6 @@ static int GetTokPrecedence() {
 /// Error* - These are little helper functions for error handling.
 ExprAST *Error(const char *Str) { fprintf(stderr, "Error: %s\n", Str);return 0;}
 PrototypeAST *ErrorP(const char *Str) { Error(Str); return 0; }
-FunctionAST *ErrorF(const char *Str) { Error(Str); return 0; }
 
 static ExprAST *ParseExpression();
 
diff --git a/examples/Kaleidoscope/Chapter3/toy.cpp b/examples/Kaleidoscope/Chapter3/toy.cpp
index 2494345..a7b60ba 100644
--- a/examples/Kaleidoscope/Chapter3/toy.cpp
+++ b/examples/Kaleidoscope/Chapter3/toy.cpp
@@ -80,17 +80,14 @@ static int gettok() {
 //===----------------------------------------------------------------------===//
 // Abstract Syntax Tree (aka Parse Tree)
 //===----------------------------------------------------------------------===//
-
+namespace {
 /// ExprAST - Base class for all expression nodes.
 class ExprAST {
 public:
-  virtual ~ExprAST();
+  virtual ~ExprAST() {}
   virtual Value *Codegen() = 0;
 };
 
-// Provide out-of-line definition to prevent weak vtable.
-ExprAST::~ExprAST() {}
-
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
@@ -150,6 +147,7 @@ public:
   
   Function *Codegen();
 };
+} // end anonymous namespace
 
 //===----------------------------------------------------------------------===//
 // Parser
diff --git a/examples/Kaleidoscope/Chapter4/toy.cpp b/examples/Kaleidoscope/Chapter4/toy.cpp
index 4d56c0f..27c3f4f 100644
--- a/examples/Kaleidoscope/Chapter4/toy.cpp
+++ b/examples/Kaleidoscope/Chapter4/toy.cpp
@@ -87,17 +87,14 @@ static int gettok() {
 //===----------------------------------------------------------------------===//
 // Abstract Syntax Tree (aka Parse Tree)
 //===----------------------------------------------------------------------===//
-
+namespace {
 /// ExprAST - Base class for all expression nodes.
 class ExprAST {
 public:
-  virtual ~ExprAST();
+  virtual ~ExprAST() {}
   virtual Value *Codegen() = 0;
 };
 
-// Provide out-of-line definition to prevent weak vtable.
-ExprAST::~ExprAST() {}
-
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
@@ -157,6 +154,7 @@ public:
   
   Function *Codegen();
 };
+} // end anonymous namespace
 
 //===----------------------------------------------------------------------===//
 // Parser
diff --git a/examples/Kaleidoscope/Chapter5/toy.cpp b/examples/Kaleidoscope/Chapter5/toy.cpp
index 113016a..fe4cdfe 100644
--- a/examples/Kaleidoscope/Chapter5/toy.cpp
+++ b/examples/Kaleidoscope/Chapter5/toy.cpp
@@ -96,17 +96,14 @@ static int gettok() {
 //===----------------------------------------------------------------------===//
 // Abstract Syntax Tree (aka Parse Tree)
 //===----------------------------------------------------------------------===//
-
+namespace {
 /// ExprAST - Base class for all expression nodes.
 class ExprAST {
 public:
-  virtual ~ExprAST();
+  virtual ~ExprAST() {}
   virtual Value *Codegen() = 0;
 };
 
-// Provide out-of-line definition to prevent weak vtable.
-ExprAST::~ExprAST() {}
-
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
@@ -186,6 +183,7 @@ public:
   
   Function *Codegen();
 };
+} // end anonymous namespace
 
 //===----------------------------------------------------------------------===//
 // Parser
diff --git a/examples/Kaleidoscope/Chapter6/toy.cpp b/examples/Kaleidoscope/Chapter6/toy.cpp
index 70f233b..b7b347d 100644
--- a/examples/Kaleidoscope/Chapter6/toy.cpp
+++ b/examples/Kaleidoscope/Chapter6/toy.cpp
@@ -101,17 +101,14 @@ static int gettok() {
 //===----------------------------------------------------------------------===//
 // Abstract Syntax Tree (aka Parse Tree)
 //===----------------------------------------------------------------------===//
-
+namespace {
 /// ExprAST - Base class for all expression nodes.
 class ExprAST {
 public:
-  virtual ~ExprAST();
+  virtual ~ExprAST() {}
   virtual Value *Codegen() = 0;
 };
 
-// Provide out-of-line definition to prevent weak vtable.
-ExprAST::~ExprAST() {}
-
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
@@ -214,6 +211,7 @@ public:
   
   Function *Codegen();
 };
+} // end anonymous namespace
 
 //===----------------------------------------------------------------------===//
 // Parser
diff --git a/examples/Kaleidoscope/Chapter7/toy.cpp b/examples/Kaleidoscope/Chapter7/toy.cpp
index a05d134..5c66f5c 100644
--- a/examples/Kaleidoscope/Chapter7/toy.cpp
+++ b/examples/Kaleidoscope/Chapter7/toy.cpp
@@ -105,17 +105,14 @@ static int gettok() {
 //===----------------------------------------------------------------------===//
 // Abstract Syntax Tree (aka Parse Tree)
 //===----------------------------------------------------------------------===//
-
+namespace {
 /// ExprAST - Base class for all expression nodes.
 class ExprAST {
 public:
-  virtual ~ExprAST();
+  virtual ~ExprAST() {}
   virtual Value *Codegen() = 0;
 };
 
-// Provide out-of-line definition to prevent weak vtable.
-ExprAST::~ExprAST() {}
-
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
@@ -232,6 +229,7 @@ public:
   
   Function *Codegen();
 };
+} // end anonymous namespace
 
 //===----------------------------------------------------------------------===//
 // Parser
diff --git a/tools/llvm-stress/llvm-stress.cpp b/tools/llvm-stress/llvm-stress.cpp
index 672e481..fd10baf 100644
--- a/tools/llvm-stress/llvm-stress.cpp
+++ b/tools/llvm-stress/llvm-stress.cpp
@@ -52,6 +52,7 @@ static cl::opt<bool> GenPPCFP128("generate-ppc-fp128",
 static cl::opt<bool> GenX86MMX("generate-x86-mmx",
   cl::desc("Generate X86 MMX floating-point values"), cl::init(false));
 
+namespace {
 /// A utility class to provide a pseudo-random number generator which is
 /// the same across all platforms. This is somewhat close to the libc
 /// implementation. Note: This is not a cryptographically secure pseudorandom
@@ -128,7 +129,7 @@ public:
     BB(Block),PT(PT),Ran(R),Context(BB->getContext()) {}
 
   /// virtual D'tor to silence warnings.
-  virtual ~Modifier();
+  virtual ~Modifier() {}
 
   /// Add a new instruction.
   virtual void Act() = 0;
@@ -287,7 +288,6 @@ protected:
 
 struct LoadModifier: public Modifier {
   LoadModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
-  virtual ~LoadModifier();
   virtual void Act() {
     // Try to use predefined pointers. If non exist, use undef pointer value;
     Value *Ptr = getRandomPointerValue();
@@ -298,7 +298,6 @@ struct LoadModifier: public Modifier {
 
 struct StoreModifier: public Modifier {
   StoreModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
-  virtual ~StoreModifier();
   virtual void Act() {
     // Try to use predefined pointers. If non exist, use undef pointer value;
     Value *Ptr = getRandomPointerValue();
@@ -317,7 +316,6 @@ struct StoreModifier: public Modifier {
 
 struct BinModifier: public Modifier {
   BinModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
-  virtual ~BinModifier();
 
   virtual void Act() {
     Value *Val0 = getRandomVal();
@@ -362,8 +360,6 @@ struct BinModifier: public Modifier {
 /// Generate constant values.
 struct ConstModifier: public Modifier {
   ConstModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
-  virtual ~ConstModifier();
-
   virtual void Act() {
     Type *Ty = pickType();
 
@@ -410,7 +406,6 @@ struct ConstModifier: public Modifier {
 
 struct AllocaModifier: public Modifier {
   AllocaModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R){}
-  virtual ~AllocaModifier();
 
   virtual void Act() {
     Type *Tp = pickType();
@@ -421,7 +416,6 @@ struct AllocaModifier: public Modifier {
 struct ExtractElementModifier: public Modifier {
   ExtractElementModifier(BasicBlock *BB, PieceTable *PT, Random *R):
     Modifier(BB, PT, R) {}
-  virtual ~ExtractElementModifier();
 
   virtual void Act() {
     Value *Val0 = getRandomVectorValue();
@@ -435,8 +429,6 @@ struct ExtractElementModifier: public Modifier {
 
 struct ShuffModifier: public Modifier {
   ShuffModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
-  virtual ~ShuffModifier();
-
   virtual void Act() {
 
     Value *Val0 = getRandomVectorValue();
@@ -465,7 +457,6 @@ struct ShuffModifier: public Modifier {
 struct InsertElementModifier: public Modifier {
   InsertElementModifier(BasicBlock *BB, PieceTable *PT, Random *R):
     Modifier(BB, PT, R) {}
-  virtual ~InsertElementModifier();
 
   virtual void Act() {
     Value *Val0 = getRandomVectorValue();
@@ -482,8 +473,6 @@ struct InsertElementModifier: public Modifier {
 
 struct CastModifier: public Modifier {
   CastModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
-  virtual ~CastModifier();
-
   virtual void Act() {
 
     Value *V = getRandomVal();
@@ -570,7 +559,6 @@ struct CastModifier: public Modifier {
 struct SelectModifier: public Modifier {
   SelectModifier(BasicBlock *BB, PieceTable *PT, Random *R):
     Modifier(BB, PT, R) {}
-  virtual ~SelectModifier();
 
   virtual void Act() {
     // Try a bunch of different select configuration until a valid one is found.
@@ -595,8 +583,6 @@ struct SelectModifier: public Modifier {
 
 struct CmpModifier: public Modifier {
   CmpModifier(BasicBlock *BB, PieceTable *PT, Random *R):Modifier(BB, PT, R) {}
-  virtual ~CmpModifier();
-
   virtual void Act() {
 
     Value *Val0 = getRandomVal();
@@ -622,21 +608,9 @@ struct CmpModifier: public Modifier {
   }
 };
 
-// Use out-of-line definitions to prevent weak vtables.
-Modifier::~Modifier() {}
-LoadModifier::~LoadModifier() {}
-StoreModifier::~StoreModifier() {}
-BinModifier::~BinModifier() {}
-ConstModifier::~ConstModifier() {}
-AllocaModifier::~AllocaModifier() {}
-ExtractElementModifier::~ExtractElementModifier() {}
-ShuffModifier::~ShuffModifier() {}
-InsertElementModifier::~InsertElementModifier() {}
-CastModifier::~CastModifier() {}
-SelectModifier::~SelectModifier() {}
-CmpModifier::~CmpModifier() {}
-
-void FillFunction(Function *F, Random &R) {
+} // end anonymous namespace
+
+static void FillFunction(Function *F, Random &R) {
   // Create a legal entry block.
   BasicBlock *BB = BasicBlock::Create(F->getContext(), "BB", F);
   ReturnInst::Create(F->getContext(), BB);
@@ -683,7 +657,7 @@ void FillFunction(Function *F, Random &R) {
   SM->ActN(5); // Throw in a few stores.
 }
 
-void IntroduceControlFlow(Function *F, Random &R) {
+static void IntroduceControlFlow(Function *F, Random &R) {
   std::vector<Instruction*> BoolInst;
   for (BasicBlock::iterator it = F->begin()->begin(),
        e = F->begin()->end(); it != e; ++it) {
diff --git a/unittests/ADT/IntrusiveRefCntPtrTest.cpp b/unittests/ADT/IntrusiveRefCntPtrTest.cpp
index a74e05e..c67ec13 100644
--- a/unittests/ADT/IntrusiveRefCntPtrTest.cpp
+++ b/unittests/ADT/IntrusiveRefCntPtrTest.cpp
@@ -10,14 +10,13 @@
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "gtest/gtest.h"
 
-namespace llvm {
-
-struct VirtualRefCounted : public RefCountedBaseVPTR {
-  virtual void f();
+namespace {
+struct VirtualRefCounted : public llvm::RefCountedBaseVPTR {
+  virtual void f() {}
 };
+}
 
-// Provide out-of-line definition to prevent weak vtable.
-void VirtualRefCounted::f() {}
+namespace llvm {
 
 // Run this test with valgrind to detect memory leaks.
 TEST(IntrusiveRefCntPtr, RefCountedBaseVPTRCopyDoesNotLeak) {
diff --git a/unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp b/unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp
index 15c58c4..46d6d9b 100644
--- a/unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp
+++ b/unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp
@@ -59,6 +59,7 @@ static void roundTripDestroy(void *object) {
   delete static_cast<SectionMemoryManager*>(object);
 }
 
+namespace {
 class MCJITCAPITest : public testing::Test, public MCJITTestAPICommon {
 protected:
   MCJITCAPITest() {
@@ -83,8 +84,14 @@ protected:
     UnsupportedOSs.push_back(Triple::Cygwin);
   }
   
-  virtual void SetUp();
-
+  virtual void SetUp() {
+    didCallAllocateCodeSection = false;
+    Module = 0;
+    Function = 0;
+    Engine = 0;
+    Error = 0;
+  }
+  
   virtual void TearDown() {
     if (Engine)
       LLVMDisposeExecutionEngine(Engine);
@@ -150,15 +157,7 @@ protected:
   LLVMExecutionEngineRef Engine;
   char *Error;
 };
-
-// Provide out-of-line definition to prevent weak vtable.
-void MCJITCAPITest::SetUp() {
-  didCallAllocateCodeSection = false;
-  Module = 0;
-  Function = 0;
-  Engine = 0;
-  Error = 0;
-}
+} // end anonymous namespace
 
 TEST_F(MCJITCAPITest, simple_function) {
   SKIP_UNSUPPORTED_PLATFORM;
diff --git a/unittests/ExecutionEngine/MCJIT/MCJITMultipleModuleTest.cpp b/unittests/ExecutionEngine/MCJIT/MCJITMultipleModuleTest.cpp
index cea6274..7c3239e 100644
--- a/unittests/ExecutionEngine/MCJIT/MCJITMultipleModuleTest.cpp
+++ b/unittests/ExecutionEngine/MCJIT/MCJITMultipleModuleTest.cpp
@@ -18,16 +18,10 @@
 
 using namespace llvm;
 
-class MCJITMultipleModuleTest : public testing::Test, public MCJITTestBase {
-public:
-  virtual ~MCJITMultipleModuleTest();
-};
-
-// Provide out-of-line definition to prevent weak vtable.
-MCJITMultipleModuleTest::~MCJITMultipleModuleTest() {}
-
 namespace {
 
+class MCJITMultipleModuleTest : public testing::Test, public MCJITTestBase {};
+
 // FIXME: ExecutionEngine has no support empty modules
 /*
 TEST_F(MCJITMultipleModuleTest, multiple_empty_modules) {
diff --git a/unittests/ExecutionEngine/MCJIT/MCJITTest.cpp b/unittests/ExecutionEngine/MCJIT/MCJITTest.cpp
index 9786bef..fab8155 100644
--- a/unittests/ExecutionEngine/MCJIT/MCJITTest.cpp
+++ b/unittests/ExecutionEngine/MCJIT/MCJITTest.cpp
@@ -18,19 +18,13 @@
 
 using namespace llvm;
 
+namespace {
+
 class MCJITTest : public testing::Test, public MCJITTestBase {
 protected:
-
-  virtual void SetUp();
+  virtual void SetUp() { M.reset(createEmptyModule("<main>")); }
 };
 
-// Provide out-of-line definition to prevent weak vtable.
-void MCJITTest::SetUp() {
-  M.reset(createEmptyModule("<main>"));
-}
-
-namespace {
-
 // FIXME: Ensure creating an execution engine does not crash when constructed
 //        with a null module.
 /*
diff --git a/utils/TableGen/CodeGenSchedule.cpp b/utils/TableGen/CodeGenSchedule.cpp
index 6da3ad7..dd06433 100644
--- a/utils/TableGen/CodeGenSchedule.cpp
+++ b/utils/TableGen/CodeGenSchedule.cpp
@@ -36,17 +36,14 @@ static void dumpIdxVec(const SmallVectorImpl<unsigned> &V) {
 }
 #endif
 
+namespace {
 // (instrs a, b, ...) Evaluate and union all arguments. Identical to AddOp.
 struct InstrsOp : public SetTheory::Operator {
   virtual void apply(SetTheory &ST, DagInit *Expr, SetTheory::RecSet &Elts,
-                     ArrayRef<SMLoc> Loc);
-};
-
-// Provide out-of-line definition to prevent weak vtable.
-void InstrsOp::apply(SetTheory &ST, DagInit *Expr, SetTheory::RecSet &Elts,
                      ArrayRef<SMLoc> Loc) {
-  ST.evaluate(Expr->arg_begin(), Expr->arg_end(), Elts, Loc);
-}
+    ST.evaluate(Expr->arg_begin(), Expr->arg_end(), Elts, Loc);
+  }
+};
 
 // (instregex "OpcPat",...) Find all instructions matching an opcode pattern.
 //
@@ -60,38 +57,35 @@ struct InstRegexOp : public SetTheory::Operator {
   const CodeGenTarget &Target;
   InstRegexOp(const CodeGenTarget &t): Target(t) {}
 
-  virtual void apply(SetTheory &ST, DagInit *Expr, SetTheory::RecSet &Elts,
-                     ArrayRef<SMLoc> Loc);
-};
-
-// Provide out-of-line definition to prevent weak vtable.
-void InstRegexOp::apply(SetTheory &ST, DagInit *Expr, SetTheory::RecSet &Elts,
-                       ArrayRef<SMLoc> Loc) {
-  SmallVector<Regex*, 4> RegexList;
-  for (DagInit::const_arg_iterator
-       AI = Expr->arg_begin(), AE = Expr->arg_end(); AI != AE; ++AI) {
-    StringInit *SI = dyn_cast<StringInit>(*AI);
-    if (!SI)
-      PrintFatalError(Loc, "instregex requires pattern string: "
-                      + Expr->getAsString());
-    std::string pat = SI->getValue();
-    // Implement a python-style prefix match.
-    if (pat[0] != '^') {
-      pat.insert(0, "^(");
-      pat.insert(pat.end(), ')');
-    }
-    RegexList.push_back(new Regex(pat));
-  }
-  for (CodeGenTarget::inst_iterator I = Target.inst_begin(),
-       E = Target.inst_end(); I != E; ++I) {
-    for (SmallVectorImpl<Regex*>::iterator
-         RI = RegexList.begin(), RE = RegexList.end(); RI != RE; ++RI) {
-      if ((*RI)->match((*I)->TheDef->getName()))
-        Elts.insert((*I)->TheDef);
+  void apply(SetTheory &ST, DagInit *Expr, SetTheory::RecSet &Elts,
+             ArrayRef<SMLoc> Loc) {
+    SmallVector<Regex*, 4> RegexList;
+    for (DagInit::const_arg_iterator
+           AI = Expr->arg_begin(), AE = Expr->arg_end(); AI != AE; ++AI) {
+      StringInit *SI = dyn_cast<StringInit>(*AI);
+      if (!SI)
+        PrintFatalError(Loc, "instregex requires pattern string: "
+          + Expr->getAsString());
+      std::string pat = SI->getValue();
+      // Implement a python-style prefix match.
+      if (pat[0] != '^') {
+        pat.insert(0, "^(");
+        pat.insert(pat.end(), ')');
+      }
+      RegexList.push_back(new Regex(pat));
+    }
+    for (CodeGenTarget::inst_iterator I = Target.inst_begin(),
+           E = Target.inst_end(); I != E; ++I) {
+      for (SmallVectorImpl<Regex*>::iterator
+             RI = RegexList.begin(), RE = RegexList.end(); RI != RE; ++RI) {
+        if ((*RI)->match((*I)->TheDef->getName()))
+          Elts.insert((*I)->TheDef);
+      }
     }
+    DeleteContainerPointers(RegexList);
   }
-  DeleteContainerPointers(RegexList);
-}
+};
+} // end anonymous namespace
 
 /// CodeGenModels ctor interprets machine model records and populates maps.
 CodeGenSchedModels::CodeGenSchedModels(RecordKeeper &RK,
diff --git a/utils/TableGen/TGValueTypes.cpp b/utils/TableGen/TGValueTypes.cpp
index b0bbdf9..f4893f5 100644
--- a/utils/TableGen/TGValueTypes.cpp
+++ b/utils/TableGen/TGValueTypes.cpp
@@ -43,12 +43,12 @@ Type::~Type() {}
 
 }
 
+namespace {
 class ExtendedIntegerType : public Type {
   unsigned BitWidth;
 public:
   explicit ExtendedIntegerType(unsigned bits)
     : Type(TK_ExtendedIntegerType), BitWidth(bits) {}
-  virtual ~ExtendedIntegerType();
   static bool classof(const Type *T) {
     return T->getKind() == TK_ExtendedIntegerType;
   }
@@ -60,16 +60,12 @@ public:
   }
 };
 
-// Provide out-of-line definition to prevent weak vtable.
-ExtendedIntegerType::~ExtendedIntegerType() {}
-
 class ExtendedVectorType : public Type {
   EVT ElementType;
   unsigned NumElements;
 public:
   ExtendedVectorType(EVT elty, unsigned num)
     : Type(TK_ExtendedVectorType), ElementType(elty), NumElements(num) {}
-  virtual ~ExtendedVectorType();
   static bool classof(const Type *T) {
     return T->getKind() == TK_ExtendedVectorType;
   }
@@ -83,9 +79,7 @@ public:
     return NumElements;
   }
 };
-
-// Provide out-of-line definition to prevent weak vtable.
-ExtendedVectorType::~ExtendedVectorType() {}
+} // end anonymous namespace
 
 static std::map<unsigned, const Type *>
   ExtendedIntegerTypeMap;