diff --git a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
--- a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
+++ b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
@@ -303,13 +303,20 @@
 /// Given a single MLIR operation, create the corresponding LLVM IR operation
 /// using the `builder`.
 LogicalResult
-ModuleTranslation::convertOperation(Operation &opInst,
+ModuleTranslation::convertOperation(Operation &op,
                                     llvm::IRBuilderBase &builder) {
-  if (failed(iface.convertOperation(&opInst, builder, *this)))
-    return opInst.emitError("unsupported or non-LLVM operation: ")
-           << opInst.getName();
-
-  return convertDialectAttributes(&opInst);
+  const LLVMTranslationDialectInterface *opIface = iface.getInterfaceFor(&op);
+  if (!opIface)
+    return op.emitError("cannot be converted to LLVM IR: missing "
+                        "`LLVMTranslationDialectInterface` registration for "
+                        "dialect for op: ")
+           << op.getName();
+
+  if (failed(opIface->convertOperation(&op, builder, *this)))
+    return op.emitError("LLVM Translation failed for operation: ")
+           << op.getName();
+
+  return convertDialectAttributes(&op);
 }
 
 /// Convert block to LLVM IR.  Unless `ignoreArguments` is set, emit PHI nodes