Resolve test failure due to incorrect usage of getInt()

Resolve test failure by checking if an IntegerAttr is int

Author: siddhesh195

mlir/lib/Conversion/LLVMCommon/TypeConverter.cpp

@@ -528,7 +528,8 @@ LLVMTypeConverter::getMemRefAddressSpace(BaseMemRefType type) const {
   if (!(*converted)) // Conversion to default is 0.
     return 0;
   if (auto explicitSpace = llvm::dyn_cast_if_present<IntegerAttr>(*converted)) {
-    if (explicitSpace.getType().isSignedInteger())
+    if (explicitSpace.getType().isIndex() ||
+        explicitSpace.getType().isSignlessInteger())
       return explicitSpace.getInt();
   }
   return failure();