Add missing feature check for data layout pointer handling

Author: RiverDave

clang/include/clang/CIR/MissingFeatures.h

@@ -209,6 +209,7 @@ struct MissingFeatures {
   static bool dataLayoutTypeIsSized() { return false; }
   static bool dataLayoutTypeAllocSize() { return false; }
   static bool dataLayoutTypeStoreSize() { return false; }
+  static bool dataLayoutPtrHandlingBasedOnLangAS() { return false; }
   static bool deferredCXXGlobalInit() { return false; }
   static bool deleteArray() { return false; }
   static bool devirtualizeMemberFunction() { return false; }

clang/lib/CIR/Dialect/IR/CIRTypes.cpp

@@ -323,13 +323,15 @@ llvm::TypeSize
 PointerType::getTypeSizeInBits(const ::mlir::DataLayout &dataLayout,
                                ::mlir::DataLayoutEntryListRef params) const {
   // FIXME: improve this in face of address spaces
+  assert(!cir::MissingFeatures::dataLayoutPtrHandlingBasedOnLangAS());
   return llvm::TypeSize::getFixed(64);
 }
 
 uint64_t
 PointerType::getABIAlignment(const ::mlir::DataLayout &dataLayout,
                              ::mlir::DataLayoutEntryListRef params) const {
   // FIXME: improve this in face of address spaces
+  assert(!cir::MissingFeatures::dataLayoutPtrHandlingBasedOnLangAS());
   return 8;
 }