[tuner]: add code comments

Signed-off-by: Bangtian Liu <[email protected]>

tuner/tuner/common.py

@@ -163,15 +163,34 @@ def get_lowering_config(
     return iree_gpu.LoweringConfigAttr.get(lowering_config_attrs)
 
 
+# Generate a config dictionary in translation info
+"""
+Example IR
+translation_info = #iree_codegen.translation_info<
+                pipeline = LLVMGPUVectorDistribute
+                workgroup_size = [512, 1, 1]
+                subgroup_size = 64,
+                {gpu_pipeline_options = #iree_gpu.pipeline_options<>
+                 llvm_func_attrs = {"amdgpu-waves-per-eu" = "3"}
+                }
+            >
+Example Usage:
+        pipeline_options = iree_gpu.PipelineOptionsAttr.get(...)
+        waves_per_eu = 3
+
+        config_dict = get_translation_info_config(
+            pipeline_options=pipeline_options,
+            waves_per_eu=waves_per_eu
+        )
+
+this 'config_dict' is subsequently used afterward to generate the 'translation_info' in the above example IR.
+"""
+
+
 def get_translation_info_config(
-    pipeline_options: iree_gpu.PipelineOptionsAttr, waves_per_eu: int | str
+    pipeline_options: iree_gpu.PipelineOptionsAttr, waves_per_eu: int
 ) -> ir.DictAttr:
-    if isinstance(waves_per_eu, int):
-        waves_per_eu = str(waves_per_eu)
-    elif not isinstance(waves_per_eu, str):
-        assert (
-            False
-        ), f"waves_per_eu must be an int or str, but got {type(waves_per_eu).__name__}"
+    waves_per_eu = str(waves_per_eu)
 
     # Create the waves_per_eu dictionary attribute.
     waves_per_eu_dict = ir.DictAttr.get(