Revert "[opaque pointer type] update for LLVM API change"

This was the wrong direction to take anyway (because ultimately the
GlobalValue needed the pointee type again and /it/ used
PointerType::getElementType eventually anyway)... let's go a different way.

This reverts commit r236161.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@247586 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CGCXX.cpp

@@ -185,8 +185,8 @@ bool CodeGenModule::TryEmitDefinitionAsAlias(GlobalDecl AliasDecl,
     return true;
 
   // Create the alias with no name.
-  auto *Alias =
-      llvm::GlobalAlias::create(AliasType, Linkage, "", Aliasee, &getModule());
+  auto *Alias = llvm::GlobalAlias::create(AliasType->getElementType(), 0,
+                                          Linkage, "", Aliasee, &getModule());
 
   // Switch any previous uses to the alias.
   if (Entry) {

lib/CodeGen/CGObjCGNU.cpp

@@ -1065,7 +1065,7 @@ llvm::Value *CGObjCGNU::GetSelector(CodeGenFunction &CGF, Selector Sel,
   }
   if (!SelValue) {
     SelValue = llvm::GlobalAlias::create(
-        SelectorTy, llvm::GlobalValue::PrivateLinkage,
+        SelectorTy->getElementType(), 0, llvm::GlobalValue::PrivateLinkage,
         ".objc_selector_" + Sel.getAsString(), &TheModule);
     Types.emplace_back(TypeEncoding, SelValue);
   }
@@ -1278,14 +1278,14 @@ CGObjCGNU::GenerateMessageSendSuper(CodeGenFunction &CGF,
     if (IsClassMessage)  {
       if (!MetaClassPtrAlias) {
         MetaClassPtrAlias = llvm::GlobalAlias::create(
-            IdTy, llvm::GlobalValue::InternalLinkage,
+            IdTy->getElementType(), 0, llvm::GlobalValue::InternalLinkage,
             ".objc_metaclass_ref" + Class->getNameAsString(), &TheModule);
       }
       ReceiverClass = MetaClassPtrAlias;
     } else {
       if (!ClassPtrAlias) {
         ClassPtrAlias = llvm::GlobalAlias::create(
-            IdTy, llvm::GlobalValue::InternalLinkage,
+            IdTy->getElementType(), 0, llvm::GlobalValue::InternalLinkage,
             ".objc_class_ref" + Class->getNameAsString(), &TheModule);
       }
       ReceiverClass = ClassPtrAlias;

lib/CodeGen/CodeGenModule.cpp

@@ -2772,7 +2772,7 @@ void CodeGenModule::EmitAliasDefinition(GlobalDecl GD) {
 
   // Create the new alias itself, but don't set a name yet.
   auto *GA = llvm::GlobalAlias::create(
-      cast<llvm::PointerType>(Aliasee->getType()),
+      cast<llvm::PointerType>(Aliasee->getType())->getElementType(), 0,
       llvm::Function::ExternalLinkage, "", Aliasee, &getModule());
 
   if (Entry) {

lib/CodeGen/ItaniumCXXABI.cpp

@@ -3354,8 +3354,8 @@ static void emitConstructorDestructorAlias(CodeGenModule &CGM,
   llvm::PointerType *AliasType = Aliasee->getType();
 
   // Create the alias with no name.
-  auto *Alias = llvm::GlobalAlias::create(AliasType, Linkage, "", Aliasee,
-                                          &CGM.getModule());
+  auto *Alias = llvm::GlobalAlias::create(
+      AliasType->getElementType(), 0, Linkage, "", Aliasee, &CGM.getModule());
 
   // Switch any previous uses to the alias.
   if (Entry) {

lib/CodeGen/MicrosoftCXXABI.cpp

@@ -1734,8 +1734,9 @@ llvm::GlobalVariable *MicrosoftCXXABI::getAddrOfVTable(const CXXRecordDecl *RD,
         C->setSelectionKind(llvm::Comdat::Largest);
     }
     VFTable = llvm::GlobalAlias::create(
-        cast<llvm::PointerType>(VTableGEP->getType()), VFTableLinkage,
-        VFTableName.str(), VTableGEP, &CGM.getModule());
+        cast<llvm::SequentialType>(VTableGEP->getType())->getElementType(),
+        /*AddressSpace=*/0, VFTableLinkage, VFTableName.str(), VTableGEP,
+        &CGM.getModule());
     VFTable->setUnnamedAddr(true);
   } else {
     // We don't need a GlobalAlias to be a symbol for the VTable if we won't