Revert "Update to LLVM's use of WeakTrackingVH; NFC"

This reverts commit r301427.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@301430 91177308-0d34-0410-b5e6-96231b3b80d8

Author: sanjoy

lib/CodeGen/CGDeclCXX.cpp

@@ -571,10 +571,9 @@ CodeGenFunction::GenerateCXXGlobalInitFunc(llvm::Function *Fn,
   FinishFunction();
 }
 
-void CodeGenFunction::GenerateCXXGlobalDtorsFunc(
-    llvm::Function *Fn,
-    const std::vector<std::pair<llvm::WeakTrackingVH, llvm::Constant *>>
-        &DtorsAndObjects) {
+void CodeGenFunction::GenerateCXXGlobalDtorsFunc(llvm::Function *Fn,
+                  const std::vector<std::pair<llvm::WeakVH, llvm::Constant*> >
+                                                &DtorsAndObjects) {
   {
     auto NL = ApplyDebugLocation::CreateEmpty(*this);
     StartFunction(GlobalDecl(), getContext().VoidTy, Fn,

lib/CodeGen/CGObjCMac.cpp

@@ -886,7 +886,7 @@ class CGObjCCommonMac : public CodeGen::CGObjCRuntime {
 
   /// Cached reference to the class for constant strings. This value has type
   /// int * but is actually an Obj-C class pointer.
-  llvm::WeakTrackingVH ConstantStringClassRef;
+  llvm::WeakVH ConstantStringClassRef;
 
   /// \brief The LLVM type corresponding to NSConstantString.
   llvm::StructType *NSConstantStringType = nullptr;

lib/CodeGen/CodeGenFunction.h

@@ -3470,10 +3470,9 @@ class CodeGenFunction : public CodeGenTypeCache {
 
   /// GenerateCXXGlobalDtorsFunc - Generates code for destroying global
   /// variables.
-  void GenerateCXXGlobalDtorsFunc(
-      llvm::Function *Fn,
-      const std::vector<std::pair<llvm::WeakTrackingVH, llvm::Constant *>>
-          &DtorsAndObjects);
+  void GenerateCXXGlobalDtorsFunc(llvm::Function *Fn,
+                                  const std::vector<std::pair<llvm::WeakVH,
+                                  llvm::Constant*> > &DtorsAndObjects);
 
   void GenerateCXXGlobalVarDeclInitFunc(llvm::Function *Fn,
                                         const VarDecl *D,

lib/CodeGen/CodeGenModule.cpp

@@ -1150,7 +1150,7 @@ void CodeGenModule::addCompilerUsedGlobal(llvm::GlobalValue *GV) {
 }
 
 static void emitUsed(CodeGenModule &CGM, StringRef Name,
-                     std::vector<llvm::WeakTrackingVH> &List) {
+                     std::vector<llvm::WeakVH> &List) {
   // Don't create llvm.used if there is no need.
   if (List.empty())
     return;

lib/CodeGen/CodeGenModule.h

@@ -349,8 +349,8 @@ class CodeGenModule : public CodeGenTypeCache {
   /// List of global values which are required to be present in the object file;
   /// bitcast to i8*. This is used for forcing visibility of symbols which may
   /// otherwise be optimized out.
-  std::vector<llvm::WeakTrackingVH> LLVMUsed;
-  std::vector<llvm::WeakTrackingVH> LLVMCompilerUsed;
+  std::vector<llvm::WeakVH> LLVMUsed;
+  std::vector<llvm::WeakVH> LLVMCompilerUsed;
 
   /// Store the list of global constructors and their respective priorities to
   /// be emitted when the translation unit is complete.
@@ -421,7 +421,7 @@ class CodeGenModule : public CodeGenTypeCache {
   SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits;
 
   /// Global destructor functions and arguments that need to run on termination.
-  std::vector<std::pair<llvm::WeakTrackingVH, llvm::Constant *>> CXXGlobalDtors;
+  std::vector<std::pair<llvm::WeakVH,llvm::Constant*> > CXXGlobalDtors;
 
   /// \brief The complete set of modules that has been imported.
   llvm::SetVector<clang::Module *> ImportedModules;
@@ -438,7 +438,7 @@ class CodeGenModule : public CodeGenTypeCache {
 
   /// Cached reference to the class for constant strings. This value has type
   /// int * but is actually an Obj-C class pointer.
-  llvm::WeakTrackingVH CFConstantStringClassRef;
+  llvm::WeakVH CFConstantStringClassRef;
 
   /// \brief The type used to describe the state of a fast enumeration in
   /// Objective-C's for..in loop.