transformers

cd4c5c90 - TF XLA greedy generation (#15786)

TF XLA greedy generation (#15786) * First attempt at TF XLA generation * Fix comments * Update XLA greedy generate with direct XLA calls * Support attention mask, prepare_inputs_for_generation no longer hardcoded for greedy * Handle position_ids correctly * make xla generate work for non xla case * force using xla generate * refactor * more fixes * finish cleaning * finish * finish * clean gpt2 tests * add gpt2 tests * correct more cases * up * finish * finish * more fixes * flake 8 stuff * final rag fix * Update src/transformers/models/rag/modeling_tf_rag.py * finish t5 as well * finish * Update src/transformers/generation_utils.py Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>