[AoT]Add get_input_name function to AoT Module (apache#14071)

* Add get_input_name to C AOT

* add get_input_name to AOT C++

* lint

* fix bug in AotExecutor

Author: mehrdadh

include/tvm/runtime/crt/aot_executor.h

@@ -92,6 +92,16 @@ int TVMAotExecutor_GetNumOutputs(TVMAotExecutor* executor);
  */
 int TVMAotExecutor_GetInputIndex(TVMAotExecutor* executor, const char* name);
 
+/*!
+ * \brief Return a pointer to name of input with the specified input index
+ *
+ * \param executor Pointer to executor instance, created by TVMAotExecutor_Create().
+ * \param index Input index for retrieving name.
+ * \param name Output for retrieving name.
+ * \return Pointer to input name in `name`.
+ */
+int TVMAotExecutor_GetInputName(TVMAotExecutor* executor, int index, char** name);
+
 /*!
  * \brief Run the generated program.
  *

python/tvm/micro/__init__.py

@@ -29,6 +29,7 @@
 from .session import (
     create_local_graph_executor,
     create_local_debug_executor,
+    create_local_aot_executor,
     Session,
     SessionTerminatedError,
 )

python/tvm/micro/session.py

@@ -24,6 +24,8 @@
 import pathlib
 import shutil
 from typing import Union
+
+from tvm.runtime.executor.aot_executor import AotModule
 from ..error import register_error
 from .._ffi import get_global_func, register_func
 from ..contrib import graph_executor
@@ -259,6 +261,22 @@ def create_local_debug_executor(graph_json_str, mod, device, dump_root=None):
     )
 
 
+def create_local_aot_executor(session: Session):
+    """Create a local AoT executor driving execution on the remote CPU device given.
+
+    Parameters
+    ----------
+    session : Session
+        A microTVM device session.
+
+    Returns
+    -------
+    tvm.runtime.executor.aot_executor.AotModule :
+         A local AoT executor instance that executes on the remote device.
+    """
+    return AotModule(session.create_aot_executor())
+
+
 @register_func("tvm.micro.compile_and_create_micro_session")
 def compile_and_create_micro_session(
     mod_src_bytes: bytes,

python/tvm/relay/build_module.py

@@ -575,7 +575,7 @@ def _make_executor(self, expr=None):
         ret_type = self.mod["main"].checked_type.ret_type
         if _ty.is_dynamic(ret_type):
             raise ValueError("AOT Executor only supports static graphs, got output type", ret_type)
-        mod = build(self.mod, target=self.target)
+        mod = build(self.mod, target=self.target, executor=Executor("aot"))
 
         # NOTE: Given AOT requires use of the "c" backend, must export/import to compile the
         # generated code.

python/tvm/runtime/executor/aot_executor.py

@@ -67,6 +67,7 @@ def __init__(self, module):
         self._get_num_outputs = module["get_num_outputs"]
         self._get_input_index = module["get_input_index"]
         self._get_num_inputs = module["get_num_inputs"]
+        self._get_input_name = module["get_input_name"]
 
     def set_input(self, key=None, value=None, **params):
         """Set inputs to the module via kwargs
@@ -180,3 +181,21 @@ def get_output(self, index, out=None):
             return out
 
         return self._get_output(index)
+
+    def get_input_name(self, index: int) -> str:
+        """Return the name of input with index `index`"""
+        return self._get_input_name(index)
+
+    def get_input_info(self):
+        """Return the 'shape' and 'dtype' dictionaries of the module."""
+        self.get_input_name(0)
+
+        shape_dict = dict()
+        dtype_dict = dict()
+        for ind in range(0, self.get_num_inputs()):
+            input_name = self.get_input_name(ind)
+            input_tensor = self.get_input(ind)
+            shape_dict[input_name] = input_tensor.shape
+            dtype_dict[input_name] = input_tensor.dtype
+
+        return shape_dict, dtype_dict

src/runtime/aot_executor/aot_executor.cc

@@ -156,6 +156,9 @@ PackedFunc AotExecutor::GetFunction(const std::string& name,
       CHECK(String::CanConvertFrom(args[0])) << "Input key is not a string";
       *rv = this->GetInputIndex(tvm::runtime::SanitizeName(args[0].operator String()));
     });
+  } else if (name == "get_input_name") {
+    return PackedFunc(
+        [sptr_to_self, this](TVMArgs args, TVMRetValue* rv) { *rv = this->GetInputName(args[0]); });
   } else {
     return PackedFunc();
   }
@@ -191,6 +194,11 @@ int AotExecutor::GetInputIndex(const std::string& name) {
   return -1;
 }
 
+std::string AotExecutor::GetInputName(int index) {
+  auto inputs = metadata_->inputs();
+  return inputs[index]->name();
+}
+
 int AotExecutor::GetOutputIndex(const std::string& name) {
   auto outputs = metadata_->outputs();
   for (unsigned int i = 0; i < outputs.size(); i++) {

src/runtime/aot_executor/aot_executor.h

@@ -69,6 +69,13 @@ class TVM_DLL AotExecutor : public ModuleNode {
    */
   int GetInputIndex(const std::string& name);
 
+  /*!
+   * \brief Get the input name given the index of input.
+   * \param index The index of the input.
+   * \return The name of input.
+   */
+  std::string GetInputName(int index);
+
   /*!
    * \brief Get the output index given the name of output.
    * \param name The name of the output.

src/runtime/crt/aot_executor/aot_executor.c

@@ -82,6 +82,12 @@ int TVMAotExecutor_GetInputIndex(TVMAotExecutor* executor, const char* name) {
   return rv;
 }
 
+int TVMAotExecutor_GetInputName(TVMAotExecutor* executor, int index, char** name) {
+  const TVMMetadata* md = executor->metadata;
+  *name = md->inputs[index].name;
+  return 0;
+}
+
 int TVMAotExecutor_Run(TVMAotExecutor* executor) {
   const char* tvm_main_suffix = "_run";
   char tvm_main_name[TVM_CRT_MAX_STRLEN_FUNCTION_NAME];

src/runtime/crt/aot_executor_module/aot_executor_module.c

@@ -147,6 +147,24 @@ int32_t TVMAotExecutorModule_GetInputIndex(TVMValue* args, int* tcodes, int narg
   return 0;
 }
 
+int32_t TVMAotExecutorModule_GetInputName(TVMValue* args, int* tcodes, int nargs,
+                                          TVMValue* ret_values, int* ret_tcodes,
+                                          void* resource_handle) {
+  if (nargs != 1) {
+    return kTvmErrorFunctionCallNumArguments;
+  }
+
+  char* name;
+  int ret = TVMAotExecutor_GetInputName(aot_executor.executor, args[0].v_int64, &name);
+  if (ret < 0) {
+    return kTvmErrorExecutorModuleNoSuchInput;
+  }
+
+  ret_values[0].v_str = name;
+  ret_tcodes[0] = kTVMStr;
+  return 0;
+}
+
 int32_t TVMAotExecutorModule_GetNumInputs(TVMValue* args, int* tcodes, int nargs,
                                           TVMValue* ret_values, int* ret_tcodes,
                                           void* resource_handle) {
@@ -191,10 +209,11 @@ static const TVMBackendPackedCFunc aot_executor_registry_funcs[] = {
     &TVMAotExecutorModule_Run,             // run
     &TVMAotExecutorModule_NotImplemented,  // set_input (implemented via python wrapper)
     &TVMAotExecutorModule_NotImplemented,  // share_params (do not implement)
+    &TVMAotExecutorModule_GetInputName,    // get_input_name
 };
 
 static const TVMFuncRegistry aot_executor_registry = {
-    "\x0a\0get_input\0"
+    "\x0b\0get_input\0"
     "get_input_index\0"
     "get_input_info\0"
     "get_num_inputs\0"
@@ -203,7 +222,8 @@ static const TVMFuncRegistry aot_executor_registry = {
     "load_params\0"
     "run\0"
     "set_input\0"
-    "share_params\0",
+    "share_params\0"
+    "get_input_name\0",
     aot_executor_registry_funcs};
 
 tvm_crt_error_t TVMAotExecutorModule_Register() {

tests/python/relay/aot/test_cpp_aot.py

@@ -112,6 +112,12 @@ def @main(%data : Tensor[(1, 3, 64, 64), uint8], %weight : Tensor[(3, 3, 5, 5),
     loaded_mod = tvm.runtime.load_module(test_so_path)
     runner = tvm.runtime.executor.AotModule(loaded_mod["default"](tvm.cpu(0)))
     runner.set_input(**inputs)
+
+    assert runner.get_input_name(0) == "data"
+    shape_dict, dtype_dict = runner.get_input_info()
+    assert shape_dict == {"data": (1, 3, 64, 64)}
+    assert dtype_dict == {"data": "uint8"}
+
     runner.run()
     assert (runner.get_output(0).numpy() == list(ref_outputs.values())[0]).all()