https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111449
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by HaoChen Gui <guih...@gcc.gnu.org>: https://gcc.gnu.org/g:f08ca5903c7a02b450b93143467f70b9fd8e0085 commit r14-4835-gf08ca5903c7a02b450b93143467f70b9fd8e0085 Author: Haochen Gui <guih...@gcc.gnu.org> Date: Mon Oct 23 09:14:13 2023 +0800 Expand: Enable vector mode for by pieces compares Vector mode compare instructions are efficient for equality compare on rs6000. This patch refactors the codes of by pieces operation to enable vector mode for compare. gcc/ PR target/111449 * expr.cc (can_use_qi_vectors): New function to return true if we know how to implement OP using vectors of bytes. (qi_vector_mode_supported_p): New function to check if optabs exists for the mode and certain by pieces operations. (widest_fixed_size_mode_for_size): Replace the second argument with the type of by pieces operations. Call can_use_qi_vectors and qi_vector_mode_supported_p to do the check. Call scalar_mode_supported_p to check if the scalar mode is supported. (by_pieces_ninsns): Pass the type of by pieces operation to widest_fixed_size_mode_for_size. (class op_by_pieces_d): Remove m_qi_vector_mode. Add m_op to record the type of by pieces operations. (op_by_pieces_d::op_by_pieces_d): Change last argument to the type of by pieces operations, initialize m_op with it. Pass m_op to function widest_fixed_size_mode_for_size. (op_by_pieces_d::get_usable_mode): Pass m_op to function widest_fixed_size_mode_for_size. (op_by_pieces_d::smallest_fixed_size_mode_for_size): Call can_use_qi_vectors and qi_vector_mode_supported_p to do the check. (op_by_pieces_d::run): Pass m_op to function widest_fixed_size_mode_for_size. (move_by_pieces_d::move_by_pieces_d): Set m_op to MOVE_BY_PIECES. (store_by_pieces_d::store_by_pieces_d): Set m_op with the op. (can_store_by_pieces): Pass the type of by pieces operations to widest_fixed_size_mode_for_size. (clear_by_pieces): Initialize class store_by_pieces_d with CLEAR_BY_PIECES. (compare_by_pieces_d::compare_by_pieces_d): Set m_op to COMPARE_BY_PIECES.
