[MLIR] Improve error message on missing getArgument() override on pass

[bondhugula]

Summary

Improve error message while registering a pass with a missing getArgument() override.

[mehdi_amini]

Thanks!

mlir/lib/Pass/PassRegistry.cpp

: PassRegistryEntry(
           [=](function_ref<void(const PassOptions &)> optHandler) {
             optHandler(allocator()->passOptions);
           }) {}
 
 void mlir::registerPass(const PassAllocatorFunction &function) {
   std::unique_ptr<Pass> pass = function();
   StringRef arg = pass->getArgument();
   if (arg.empty())
-    llvm::report_fatal_error(
-        "Trying to register a pass that does not override `getArgument()`");
+    llvm::report_fatal_error(llvm::Twine("Trying to register '") +
+                             pass->getName() +
+                             "' pass that does not override `getArgument()`");
   StringRef description = pass->getDescription();
   PassInfo passInfo(arg, description, function);
   passRegistry->try_emplace(arg, passInfo);
 
   // Verify that the registered pass has the same ID as any registered to this
   // arg before it.
   TypeID entryTypeID = pass->getTypeID();
   auto it = passRegistryTypeIDs->try_emplace(arg, entryTypeID).first;