[CodeGen] Replace PointerType::getUnqual(Type) with opaque

 pointer version (NFC)

Follow-up to #123569

Author: junlarsen

clang/lib/CodeGen/ABIInfoImpl.cpp

@@ -430,7 +430,7 @@ Address CodeGen::EmitVAArgInstr(CodeGenFunction &CGF, Address VAListAddr,
     CharUnits TyAlignForABI = TyInfo.Align;
 
     llvm::Type *ElementTy = CGF.ConvertTypeForMem(Ty);
-    llvm::Type *BaseTy = llvm::PointerType::getUnqual(ElementTy);
+    llvm::Type *BaseTy = llvm::PointerType::getUnqual(CGF.getLLVMContext());
     llvm::Value *Addr =
         CGF.Builder.CreateVAArg(VAListAddr.emitRawPointer(CGF), BaseTy);
     return Address(Addr, ElementTy, TyAlignForABI);

clang/lib/CodeGen/CGOpenMPRuntime.cpp

@@ -1476,13 +1476,7 @@ llvm::Type *CGOpenMPRuntime::getIdentTyPointerTy() {
 }
 
 llvm::Type *CGOpenMPRuntime::getKmpc_MicroPointerTy() {
-  if (!Kmpc_MicroTy) {
-    // Build void (*kmpc_micro)(kmp_int32 *global_tid, kmp_int32 *bound_tid,...)
-    llvm::Type *MicroParams[] = {llvm::PointerType::getUnqual(CGM.Int32Ty),
-                                 llvm::PointerType::getUnqual(CGM.Int32Ty)};
-    Kmpc_MicroTy = llvm::FunctionType::get(CGM.VoidTy, MicroParams, true);
-  }
-  return llvm::PointerType::getUnqual(Kmpc_MicroTy);
+  return llvm::PointerType::getUnqual(CGM.getLLVMContext());
 }
 
 static llvm::OffloadEntriesInfoManager::OMPTargetDeviceClauseKind

clang/lib/CodeGen/CGOpenMPRuntime.h

@@ -386,10 +386,6 @@ class CGOpenMPRuntime {
   /// Map for SourceLocation and OpenMP runtime library debug locations.
   typedef llvm::DenseMap<SourceLocation, llvm::Value *> OpenMPDebugLocMapTy;
   OpenMPDebugLocMapTy OpenMPDebugLocMap;
-  /// The type for a microtask which gets passed to __kmpc_fork_call().
-  /// Original representation is:
-  /// typedef void (kmpc_micro)(kmp_int32 global_tid, kmp_int32 bound_tid,...);
-  llvm::FunctionType *Kmpc_MicroTy = nullptr;
   /// Stores debug location and ThreadID for the function.
   struct DebugLocThreadIdTy {
     llvm::Value *DebugLoc;

clang/lib/CodeGen/ItaniumCXXABI.cpp

@@ -953,7 +953,7 @@ ItaniumCXXABI::EmitMemberPointerConversion(CodeGenFunction &CGF,
       Builder.CreateCondBr(IsVirtualOffset, MergeBB, ResignBB);
 
       CGF.EmitBlock(ResignBB);
-      llvm::Type *PtrTy = llvm::PointerType::getUnqual(CGM.Int8Ty);
+      llvm::Type *PtrTy = llvm::PointerType::getUnqual(CGM.getLLVMContext());
       MemFnPtr = Builder.CreateIntToPtr(MemFnPtr, PtrTy);
       MemFnPtr =
           CGF.emitPointerAuthResign(MemFnPtr, SrcType, CurAuthInfo, NewAuthInfo,