[RFC] Generate generated_unboxing_wrappers_everything.cpp for unboxin…

…g wrappers codegen to aid debugging (#45872)

Summary:
Pull Request resolved: #45872

`VariableType_N.cpp` is generated in a sharded manner to speed up compilationt time. Same for `generated_unboxing_wrappers_N.cpp`. However, `VariableTypeEverything.cpp` exists, but `generated_unboxing_wrappers_everything.cpp` does not. These files have all the registration/implementation code in them for easier debugging of codegen logic.

This diff adds `generated_unboxing_wrappers_everything.cpp`.

ghstack-source-id: 113606771

Test Plan: Build + CI

Reviewed By: iseeyuan

Differential Revision: D24124405

fbshipit-source-id: 1f6c938105e17cd4b14502978483a1b178c777dd

tools/jit/gen_unboxing_wrappers.py

@@ -21,6 +21,7 @@
 import argparse
 import re
 from itertools import groupby
+from functools import reduce
 from ..autograd.gen_autograd import load_aten_declarations
 from ..autograd.gen_autograd import RETURNS_VIEWS_OF_INPUT
 from ..autograd.utils import CodeTemplate, write, is_out_variant, op_name_without_overload
@@ -496,6 +497,15 @@ def expand_options(decl, i, arg):
         }
         write(out, 'generated_unboxing_wrappers_%d.cpp' % i, GENERATED_UNBOXING_WRAPPERS_CPP, env)
 
+    all_shards = reduce(
+        lambda lhs, rhs: lhs + rhs,
+        shards,
+    )
+    env = {
+        'constructors': all_shards,
+    }
+    write(out, 'generated_unboxing_wrappers_everything.cpp', GENERATED_UNBOXING_WRAPPERS_CPP, env)
+
 
 default_map = {'{}': 'None', 'nullptr': 'None', 'c10::nullopt': 'None'}