Ensure NativeFunctions.h codegen output is deterministic

bdhirsh · bdhirsh · commit d02b4c3e7076 · 2021-05-24T17:31:54.000-07:00
[ghstack-poisoned]
diff --git a/tools/codegen/gen.py b/tools/codegen/gen.py
@@ -1026,7 +1026,7 @@ def make_file_manager(install_dir: str) -> FileManager:
         'native_function_declarations': list(concatMap(
             # Convert to a set first to remove duplicate kernel names.
             # Backends are allowed to repeat kernel names; only generate the declaration once!
-            lambda f: list(set(concatMap(
+            lambda f: list(OrderedDict.fromkeys(concatMap(
                 lambda backend_idx:
                     dest.compute_native_function_declaration(f, backend_idx),
                 backend_indices.values()))),
