[clang][MicrosoftCXXABI] Avoid Type::getPointerTo() (NFC) (#110915)

`llvm::Type::getPointerTo()` is to be deprecated & removed soon.

Author: JOE1994

clang/lib/CodeGen/MicrosoftCXXABI.cpp

@@ -518,7 +518,7 @@ class MicrosoftCXXABI : public CGCXXABI {
         CGM.IntTy,
         CGM.IntTy,
         CGM.IntTy,
-        getImageRelativeType(getClassHierarchyDescriptorType()->getPointerTo()),
+        getImageRelativeType(CGM.UnqualPtrTy),
     };
     BaseClassDescriptorType = llvm::StructType::create(
         CGM.getLLVMContext(), FieldTypes, "rtti.BaseClassDescriptor");
@@ -531,13 +531,8 @@ class MicrosoftCXXABI : public CGCXXABI {
     // Forward-declare RTTIClassHierarchyDescriptor to break a cycle.
     ClassHierarchyDescriptorType = llvm::StructType::create(
         CGM.getLLVMContext(), "rtti.ClassHierarchyDescriptor");
-    llvm::Type *FieldTypes[] = {
-        CGM.IntTy,
-        CGM.IntTy,
-        CGM.IntTy,
-        getImageRelativeType(
-            getBaseClassDescriptorType()->getPointerTo()->getPointerTo()),
-    };
+    llvm::Type *FieldTypes[] = {CGM.IntTy, CGM.IntTy, CGM.IntTy,
+                                getImageRelativeType(CGM.UnqualPtrTy)};
     ClassHierarchyDescriptorType->setBody(FieldTypes);
     return ClassHierarchyDescriptorType;
   }
@@ -552,7 +547,7 @@ class MicrosoftCXXABI : public CGCXXABI {
         CGM.IntTy,
         CGM.IntTy,
         getImageRelativeType(CGM.Int8PtrTy),
-        getImageRelativeType(getClassHierarchyDescriptorType()->getPointerTo()),
+        getImageRelativeType(CGM.UnqualPtrTy),
         getImageRelativeType(CompleteObjectLocatorType),
     };
     llvm::ArrayRef<llvm::Type *> FieldTypesRef(FieldTypes);
@@ -749,8 +744,7 @@ class MicrosoftCXXABI : public CGCXXABI {
 
     llvm::SmallString<23> CTATypeName("eh.CatchableTypeArray.");
     CTATypeName += llvm::utostr(NumEntries);
-    llvm::Type *CTType =
-        getImageRelativeType(getCatchableTypeType()->getPointerTo());
+    llvm::Type *CTType = getImageRelativeType(CGM.UnqualPtrTy);
     llvm::Type *FieldTypes[] = {
         CGM.IntTy,                               // NumEntries
         llvm::ArrayType::get(CTType, NumEntries) // CatchableTypes
@@ -777,7 +771,7 @@ class MicrosoftCXXABI : public CGCXXABI {
   llvm::FunctionCallee getThrowFn() {
     // _CxxThrowException is passed an exception object and a ThrowInfo object
     // which describes the exception.
-    llvm::Type *Args[] = {CGM.Int8PtrTy, getThrowInfoType()->getPointerTo()};
+    llvm::Type *Args[] = {CGM.Int8PtrTy, CGM.UnqualPtrTy};
     llvm::FunctionType *FTy =
         llvm::FunctionType::get(CGM.VoidTy, Args, /*isVarArg=*/false);
     llvm::FunctionCallee Throw =
@@ -909,9 +903,8 @@ void MicrosoftCXXABI::emitVirtualObjectDelete(CodeGenFunction &CGF,
 }
 
 void MicrosoftCXXABI::emitRethrow(CodeGenFunction &CGF, bool isNoReturn) {
-  llvm::Value *Args[] = {
-      llvm::ConstantPointerNull::get(CGM.Int8PtrTy),
-      llvm::ConstantPointerNull::get(getThrowInfoType()->getPointerTo())};
+  llvm::Value *Args[] = {llvm::ConstantPointerNull::get(CGM.Int8PtrTy),
+                         llvm::ConstantPointerNull::get(CGM.UnqualPtrTy)};
   llvm::FunctionCallee Fn = getThrowFn();
   if (isNoReturn)
     CGF.EmitNoreturnRuntimeCallOrInvoke(Fn, Args);
@@ -1958,13 +1951,13 @@ CGCallee MicrosoftCXXABI::getVirtualFunctionPointer(CodeGenFunction &CGF,
                                                     SourceLocation Loc) {
   CGBuilderTy &Builder = CGF.Builder;
 
-  Ty = Ty->getPointerTo();
+  Ty = CGF.UnqualPtrTy;
   Address VPtr =
       adjustThisArgumentForVirtualFunctionCall(CGF, GD, This, true);
 
   auto *MethodDecl = cast<CXXMethodDecl>(GD.getDecl());
-  llvm::Value *VTable = CGF.GetVTablePtr(VPtr, Ty->getPointerTo(),
-                                         MethodDecl->getParent());
+  llvm::Value *VTable =
+      CGF.GetVTablePtr(VPtr, CGF.UnqualPtrTy, MethodDecl->getParent());
 
   MicrosoftVTableContext &VFTContext = CGM.getMicrosoftVTableContext();
   MethodVFTableLocation ML = VFTContext.getMethodVFTableLocation(GD);
@@ -2125,9 +2118,9 @@ MicrosoftCXXABI::EmitVirtualMemPtrThunk(const CXXMethodDecl *MD,
 
   // Load the vfptr and then callee from the vftable.  The callee should have
   // adjusted 'this' so that the vfptr is at offset zero.
-  llvm::Type *ThunkPtrTy = ThunkTy->getPointerTo();
-  llvm::Value *VTable = CGF.GetVTablePtr(
-      getThisAddress(CGF), ThunkPtrTy->getPointerTo(), MD->getParent());
+  llvm::Type *ThunkPtrTy = CGF.UnqualPtrTy;
+  llvm::Value *VTable =
+      CGF.GetVTablePtr(getThisAddress(CGF), CGF.UnqualPtrTy, MD->getParent());
 
   llvm::Value *VFuncPtr = CGF.Builder.CreateConstInBoundsGEP1_64(
       ThunkPtrTy, VTable, ML.Index, "vfn");
@@ -2551,7 +2544,7 @@ static ConstantAddress getInitThreadEpochPtr(CodeGenModule &CGM) {
 static llvm::FunctionCallee getInitThreadHeaderFn(CodeGenModule &CGM) {
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(llvm::Type::getVoidTy(CGM.getLLVMContext()),
-                              CGM.IntTy->getPointerTo(), /*isVarArg=*/false);
+                              CGM.UnqualPtrTy, /*isVarArg=*/false);
   return CGM.CreateRuntimeFunction(
       FTy, "_Init_thread_header",
       llvm::AttributeList::get(CGM.getLLVMContext(),
@@ -2563,7 +2556,7 @@ static llvm::FunctionCallee getInitThreadHeaderFn(CodeGenModule &CGM) {
 static llvm::FunctionCallee getInitThreadFooterFn(CodeGenModule &CGM) {
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(llvm::Type::getVoidTy(CGM.getLLVMContext()),
-                              CGM.IntTy->getPointerTo(), /*isVarArg=*/false);
+                              CGM.UnqualPtrTy, /*isVarArg=*/false);
   return CGM.CreateRuntimeFunction(
       FTy, "_Init_thread_footer",
       llvm::AttributeList::get(CGM.getLLVMContext(),
@@ -2575,7 +2568,7 @@ static llvm::FunctionCallee getInitThreadFooterFn(CodeGenModule &CGM) {
 static llvm::FunctionCallee getInitThreadAbortFn(CodeGenModule &CGM) {
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(llvm::Type::getVoidTy(CGM.getLLVMContext()),
-                              CGM.IntTy->getPointerTo(), /*isVarArg=*/false);
+                              CGM.UnqualPtrTy, /*isVarArg=*/false);
   return CGM.CreateRuntimeFunction(
       FTy, "_Init_thread_abort",
       llvm::AttributeList::get(CGM.getLLVMContext(),
@@ -3157,8 +3150,8 @@ MicrosoftCXXABI::GetVBaseOffsetFromVBPtr(CodeGenFunction &CGF,
     VBPtrAlign = CGF.getPointerAlign();
   }
 
-  llvm::Value *VBTable = Builder.CreateAlignedLoad(
-      CGM.Int32Ty->getPointerTo(0), VBPtr, VBPtrAlign, "vbtable");
+  llvm::Value *VBTable =
+      Builder.CreateAlignedLoad(CGM.UnqualPtrTy, VBPtr, VBPtrAlign, "vbtable");
 
   // Translate from byte offset to table index. It improves analyzability.
   llvm::Value *VBTableIndex = Builder.CreateAShr(
@@ -3813,8 +3806,7 @@ MSRTTIBuilder::getBaseClassArray(SmallVectorImpl<MSRTTIClass> &Classes) {
   // mode) bytes of padding.  We provide a pointer sized amount of padding by
   // adding +1 to Classes.size().  The sections have pointer alignment and are
   // marked pick-any so it shouldn't matter.
-  llvm::Type *PtrType = ABI.getImageRelativeType(
-      ABI.getBaseClassDescriptorType()->getPointerTo());
+  llvm::Type *PtrType = ABI.getImageRelativeType(CGM.UnqualPtrTy);
   auto *ArrType = llvm::ArrayType::get(PtrType, Classes.size() + 1);
   auto *BCA =
       new llvm::GlobalVariable(Module, ArrType,
@@ -4360,8 +4352,7 @@ llvm::GlobalVariable *MicrosoftCXXABI::getCatchableTypeArray(QualType T) {
     CatchableTypes.insert(getCatchableType(getContext().VoidPtrTy));
 
   uint32_t NumEntries = CatchableTypes.size();
-  llvm::Type *CTType =
-      getImageRelativeType(getCatchableTypeType()->getPointerTo());
+  llvm::Type *CTType = getImageRelativeType(CGM.UnqualPtrTy);
   llvm::ArrayType *AT = llvm::ArrayType::get(CTType, NumEntries);
   llvm::StructType *CTAType = getCatchableTypeArrayType(NumEntries);
   llvm::Constant *Fields[] = {