[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/trunk@195092 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 33 insertions, 45 deletions

diff --git a/utils/TableGen/CodeGenSchedule.cpp b/utils/TableGen/CodeGenSchedule.cpp
index 6da3ad7202..dd06433d6a 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 b0bbdf946b..f4893f50a6 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;