[mlir-runner] Check entry function not has inputs

This PR fixes a crash if entry function has inputs.

Author: CoTinker

mlir/lib/ExecutionEngine/JitRunner.cpp

@@ -222,9 +222,13 @@ static Error compileAndExecuteVoidFunction(
     CompileAndExecuteConfig config, std::unique_ptr<llvm::TargetMachine> tm) {
   auto mainFunction = dyn_cast_or_null<LLVM::LLVMFuncOp>(
       SymbolTable::lookupSymbolIn(module, entryPoint));
-  if (!mainFunction || mainFunction.empty())
+  if (!mainFunction || mainFunction.isExternal())
     return makeStringError("entry point not found");
 
+  if (cast<LLVM::LLVMFunctionType>(mainFunction.getFunctionType())
+          .getNumParams() != 0)
+    return makeStringError("function inputs not supported");
+
   auto resultType = dyn_cast<LLVM::LLVMVoidType>(
       mainFunction.getFunctionType().getReturnType());
   if (!resultType)