pytorch

1507573a - [caffe2] fix no return statement in constexpr function Clang error in TypeIndex.h (#33576)

[caffe2] fix no return statement in constexpr function Clang error in TypeIndex.h (#33576) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/33576 `throw` statement at the end of `constexpr` is ill-formed according to Clang. It happens when Clang is driving CUDA compilation and compiles for device the effected code. Due to its compilation model it requires host code to be well-formed even when compiling for device. Fix the error by guarding the entire definition of `type_index_impl` with `__CUDA_ARCH__` check. Test Plan: ```lang=bash buck build mode/opt -c fbcode.cuda_use_clang=true //fblearner/flow/projects/dper:workflow buck build mode/opt //fblearner/flow/projects/dper:workflow ``` Execute tests on devgpu: ``` buck test mode/dev-nosan -j 8 //caffe2/caffe2/python/operator_test/... //caffe2/test:cuda ``` Reviewed By: smessmer Differential Revision: D20008881 fbshipit-source-id: b0dc9abf0dc308b8b8637b54646a0411baf7fef3