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This gets rid of the linked list of STMT_VINFO_VECT_STMT and STMT_VINFO_RELATED_STMT in preparation for vectorized stmts no longer needing a stmt_vec_info (just for this chaining). This has ripple-down effects in all places we gather vectorized defs. For this new interfaces are introduced and used throughout vectorization, simplifying code in a lot of places and merging it with the SLP way of gathering vectorized operands. There is vect_get_vec_defs as the new recommended unified interface and vect_get_vec_defs_for_operand as one for non-SLP operation. I've resorted to keep the structure of the code the same where using vect_get_vec_defs would have been too disruptive for this already large patch. 2020-06-10 Richard Biener <rguenther@suse.de> * tree-vect-data-refs.c (vect_vfa_access_size): Adjust. (vect_record_grouped_load_vectors): Likewise. * tree-vect-loop.c (vect_create_epilog_for_reduction): Likewise. (vectorize_fold_left_reduction): Likewise. (vect_transform_reduction): Likewise. (vect_transform_cycle_phi): Likewise. (vectorizable_lc_phi): Likewise. (vectorizable_induction): Likewise. (vectorizable_live_operation): Likewise. (vect_transform_loop): Likewise. * tree-vect-slp.c (vect_get_slp_defs): New function, split out from overload. * tree-vect-stmts.c (vect_get_vec_def_for_operand_1): Remove. (vect_get_vec_def_for_operand): Likewise. (vect_get_vec_def_for_stmt_copy): Likewise. (vect_get_vec_defs_for_stmt_copy): Likewise. (vect_get_vec_defs_for_operand): New function. (vect_get_vec_defs): Likewise. (vect_build_gather_load_calls): Adjust. (vect_get_gather_scatter_ops): Likewise. (vectorizable_bswap): Likewise. (vectorizable_call): Likewise. (vectorizable_simd_clone_call): Likewise. (vect_get_loop_based_defs): Remove. (vect_create_vectorized_demotion_stmts): Adjust. (vectorizable_conversion): Likewise. (vectorizable_assignment): Likewise. (vectorizable_shift): Likewise. (vectorizable_operation): Likewise. (vectorizable_scan_store): Likewise. (vectorizable_store): Likewise. (vectorizable_load): Likewise. (vectorizable_condition): Likewise. (vectorizable_comparison): Likewise. (vect_transform_stmt): Adjust and remove no longer applicable sanity checks. * tree-vectorizer.c (vec_info::new_stmt_vec_info): Initialize STMT_VINFO_VEC_STMTS. (vec_info::free_stmt_vec_info): Relase it. * tree-vectorizer.h (_stmt_vec_info::vectorized_stmt): Remove. (_stmt_vec_info::vec_stmts): Add. (STMT_VINFO_VEC_STMT): Remove. (STMT_VINFO_VEC_STMTS): New. (vect_get_vec_def_for_operand_1): Remove. (vect_get_vec_def_for_operand): Likewise. (vect_get_vec_defs_for_stmt_copy): Likewise. (vect_get_vec_def_for_stmt_copy): Likewise. (vect_get_vec_defs): New overloads. (vect_get_vec_defs_for_operand): New. (vect_get_slp_defs): Declare.
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