[gcc.git] / gcc / ChangeLog

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * machmode.def (VECTOR_MODES_WITH_PREFIX): Document.
        * genmodes.c (VECTOR_MODES_WITH_PREFIX): New macro.
        (VECTOR_MODES): Use it.
        (make_vector_modes): Take the prefix as an argument.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * mode-classes.def (MODE_VECTOR_BOOL): New mode class.
        * machmode.h (INTEGRAL_MODE_P, VECTOR_MODE_P): Return true
        for MODE_VECTOR_BOOL.
        * machmode.def (VECTOR_BOOL_MODE): Document.
        * genmodes.c (VECTOR_BOOL_MODE): New macro.
        (make_vector_bool_mode): New function.
        (complete_mode, emit_mode_wider, emit_mode_adjustments): Handle
        MODE_VECTOR_BOOL.
        * lto-streamer-in.c (lto_input_mode_table): Likewise.
        * rtx-vector-builder.c (rtx_vector_builder::find_cached_value):
        Likewise.
        * stor-layout.c (int_mode_for_mode): Likewise.
        * tree.c (build_vector_type_for_mode): Likewise.
        * varasm.c (output_constant_pool_2): Likewise.
        * emit-rtl.c (init_emit_once): Make sure that CONST1_RTX (BImode) and
        CONSTM1_RTX (BImode) are the same thing.  Initialize const_tiny_rtx
        for MODE_VECTOR_BOOL.
        * expr.c (expand_expr_real_1): Use VECTOR_MODE_P instead of a list
        of mode class checks.
        * tree-vect-generic.c (expand_vector_operation): Use VECTOR_MODE_P
        instead of a list of mode class checks.
        (expand_vector_scalar_condition): Likewise.
        (type_for_widest_vector_mode): Handle BImode as an inner mode.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * machmode.h (mode_size): Change from unsigned short to
        poly_uint16_pod.
        (mode_to_bytes): Return a poly_uint16 rather than an unsigned short.
        (GET_MODE_SIZE): Return a constant if ONLY_FIXED_SIZE_MODES,
        or if measurement_type is not polynomial.
        (fixed_size_mode::includes_p): Check for constant-sized modes.
        * genmodes.c (emit_mode_size_inline): Make mode_size_inline
        return a poly_uint16 rather than an unsigned short.
        (emit_mode_size): Change the type of mode_size from unsigned short
        to poly_uint16_pod.  Use ZERO_COEFFS for the initializer.
        (emit_mode_adjustments): Cope with polynomial vector sizes.
        * lto-streamer-in.c (lto_input_mode_table): Use bp_unpack_poly_value
        for GET_MODE_SIZE.
        * lto-streamer-out.c (lto_write_mode_table): Use bp_pack_poly_value
        for GET_MODE_SIZE.
        * auto-inc-dec.c (try_merge): Treat GET_MODE_SIZE as polynomial.
        * builtins.c (expand_ifn_atomic_compare_exchange_into_call): Likewise.
        * caller-save.c (setup_save_areas): Likewise.
        (replace_reg_with_saved_mem): Likewise.
        * calls.c (emit_library_call_value_1): Likewise.
        * combine-stack-adj.c (combine_stack_adjustments_for_block): Likewise.
        * combine.c (simplify_set, make_extraction, simplify_shift_const_1)
        (gen_lowpart_for_combine): Likewise.
        * convert.c (convert_to_integer_1): Likewise.
        * cse.c (equiv_constant, cse_insn): Likewise.
        * cselib.c (autoinc_split, cselib_hash_rtx): Likewise.
        (cselib_subst_to_values): Likewise.
        * dce.c (word_dce_process_block): Likewise.
        * df-problems.c (df_word_lr_mark_ref): Likewise.
        * dwarf2cfi.c (init_one_dwarf_reg_size): Likewise.
        * dwarf2out.c (multiple_reg_loc_descriptor, mem_loc_descriptor)
        (concat_loc_descriptor, concatn_loc_descriptor, loc_descriptor)
        (rtl_for_decl_location): Likewise.
        * emit-rtl.c (gen_highpart, widen_memory_access): Likewise.
        * expmed.c (extract_bit_field_1, extract_integral_bit_field): Likewise.
        * expr.c (emit_group_load_1, clear_storage_hints): Likewise.
        (emit_move_complex, emit_move_multi_word, emit_push_insn): Likewise.
        (expand_expr_real_1): Likewise.
        * function.c (assign_parm_setup_block_p, assign_parm_setup_block)
        (pad_below): Likewise.
        * gimple-fold.c (optimize_atomic_compare_exchange_p): Likewise.
        * gimple-ssa-store-merging.c (rhs_valid_for_store_merging_p): Likewise.
        * ira.c (get_subreg_tracking_sizes): Likewise.
        * ira-build.c (ira_create_allocno_objects): Likewise.
        * ira-color.c (coalesced_pseudo_reg_slot_compare): Likewise.
        (ira_sort_regnos_for_alter_reg): Likewise.
        * ira-costs.c (record_operand_costs): Likewise.
        * lower-subreg.c (interesting_mode_p, simplify_gen_subreg_concatn)
        (resolve_simple_move): Likewise.
        * lra-constraints.c (get_reload_reg, operands_match_p): Likewise.
        (process_addr_reg, simplify_operand_subreg, curr_insn_transform)
        (lra_constraints): Likewise.
        (CONST_POOL_OK_P): Reject variable-sized modes.
        * lra-spills.c (slot, assign_mem_slot, pseudo_reg_slot_compare)
        (add_pseudo_to_slot, lra_spill): Likewise.
        * omp-low.c (omp_clause_aligned_alignment): Likewise.
        * optabs-query.c (get_best_extraction_insn): Likewise.
        * optabs-tree.c (expand_vec_cond_expr_p): Likewise.
        * optabs.c (expand_vec_perm_var, expand_vec_cond_expr): Likewise.
        (expand_mult_highpart, valid_multiword_target_p): Likewise.
        * recog.c (offsettable_address_addr_space_p): Likewise.
        * regcprop.c (maybe_mode_change): Likewise.
        * reginfo.c (choose_hard_reg_mode, record_subregs_of_mode): Likewise.
        * regrename.c (build_def_use): Likewise.
        * regstat.c (dump_reg_info): Likewise.
        * reload.c (complex_word_subreg_p, push_reload, find_dummy_reload)
        (find_reloads, find_reloads_subreg_address): Likewise.
        * reload1.c (eliminate_regs_1): Likewise.
        * rtlanal.c (for_each_inc_dec_find_inc_dec, rtx_cost): Likewise.
        * simplify-rtx.c (avoid_constant_pool_reference): Likewise.
        (simplify_binary_operation_1, simplify_subreg): Likewise.
        * targhooks.c (default_function_arg_padding): Likewise.
        (default_hard_regno_nregs, default_class_max_nregs): Likewise.
        * tree-cfg.c (verify_gimple_assign_binary): Likewise.
        (verify_gimple_assign_ternary): Likewise.
        * tree-inline.c (estimate_move_cost): Likewise.
        * tree-ssa-forwprop.c (simplify_vector_constructor): Likewise.
        * tree-ssa-loop-ivopts.c (add_autoinc_candidates): Likewise.
        (get_address_cost_ainc): Likewise.
        * tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Likewise.
        (vect_supportable_dr_alignment): Likewise.
        * tree-vect-loop.c (vect_determine_vectorization_factor): Likewise.
        (vectorizable_reduction): Likewise.
        * tree-vect-stmts.c (vectorizable_assignment, vectorizable_shift)
        (vectorizable_operation, vectorizable_load): Likewise.
        * tree.c (build_same_sized_truth_vector_type): Likewise.
        * valtrack.c (cleanup_auto_inc_dec): Likewise.
        * var-tracking.c (emit_note_insn_var_location): Likewise.
        * config/arc/arc.h (ASM_OUTPUT_CASE_END): Use as_a <scalar_int_mode>.
        (ADDR_VEC_ALIGN): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * machmode.h (mode_to_bits): Return a poly_uint16 rather than an
        unsigned short.
        (GET_MODE_BITSIZE): Return a constant if ONLY_FIXED_SIZE_MODES,
        or if measurement_type is polynomial.
        * calls.c (shift_return_value): Treat GET_MODE_BITSIZE as polynomial.
        * combine.c (make_extraction): Likewise.
        * dse.c (find_shift_sequence): Likewise.
        * dwarf2out.c (mem_loc_descriptor): Likewise.
        * expmed.c (store_integral_bit_field, extract_bit_field_1): Likewise.
        (extract_bit_field, extract_low_bits): Likewise.
        * expr.c (convert_move, convert_modes, emit_move_insn_1): Likewise.
        (optimize_bitfield_assignment_op, expand_assignment): Likewise.
        (store_expr_with_bounds, store_field, expand_expr_real_1): Likewise.
        * fold-const.c (optimize_bit_field_compare, merge_ranges): Likewise.
        * gimple-fold.c (optimize_atomic_compare_exchange_p): Likewise.
        * reload.c (find_reloads): Likewise.
        * reload1.c (alter_reg): Likewise.
        * stor-layout.c (bitwise_mode_for_mode, compute_record_mode): Likewise.
        * targhooks.c (default_secondary_memory_needed_mode): Likewise.
        * tree-if-conv.c (predicate_mem_writes): Likewise.
        * tree-ssa-strlen.c (handle_builtin_memcmp): Likewise.
        * tree-vect-patterns.c (adjust_bool_pattern): Likewise.
        * tree-vect-stmts.c (vectorizable_simd_clone_call): Likewise.
        * valtrack.c (dead_debug_insert_temp): Likewise.
        * varasm.c (mergeable_constant_section): Likewise.
        * config/sh/sh.h (LOCAL_ALIGNMENT): Use as_a <fixed_size_mode>.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * expr.c (expand_assignment): Cope with polynomial mode sizes
        when assigning to a CONCAT.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * machmode.h (mode_precision): Change from unsigned short to
        poly_uint16_pod.
        (mode_to_precision): Return a poly_uint16 rather than an unsigned
        short.
        (GET_MODE_PRECISION): Return a constant if ONLY_FIXED_SIZE_MODES,
        or if measurement_type is not polynomial.
        (HWI_COMPUTABLE_MODE_P): Turn into a function.  Optimize the case
        in which the mode is already known to be a scalar_int_mode.
        * genmodes.c (emit_mode_precision): Change the type of mode_precision
        from unsigned short to poly_uint16_pod.  Use ZERO_COEFFS for the
        initializer.
        * lto-streamer-in.c (lto_input_mode_table): Use bp_unpack_poly_value
        for GET_MODE_PRECISION.
        * lto-streamer-out.c (lto_write_mode_table): Use bp_pack_poly_value
        for GET_MODE_PRECISION.
        * combine.c (update_rsp_from_reg_equal): Treat GET_MODE_PRECISION
        as polynomial.
        (try_combine, find_split_point, combine_simplify_rtx): Likewise.
        (expand_field_assignment, make_extraction): Likewise.
        (make_compound_operation_int, record_dead_and_set_regs_1): Likewise.
        (get_last_value): Likewise.
        * convert.c (convert_to_integer_1): Likewise.
        * cse.c (cse_insn): Likewise.
        * expr.c (expand_expr_real_1): Likewise.
        * lra-constraints.c (simplify_operand_subreg): Likewise.
        * optabs-query.c (can_atomic_load_p): Likewise.
        * optabs.c (expand_atomic_load): Likewise.
        (expand_atomic_store): Likewise.
        * ree.c (combine_reaching_defs): Likewise.
        * rtl.h (partial_subreg_p, paradoxical_subreg_p): Likewise.
        * rtlanal.c (nonzero_bits1, lsb_bitfield_op_p): Likewise.
        * tree.h (type_has_mode_precision_p): Likewise.
        * ubsan.c (instrument_si_overflow): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree.h (TYPE_VECTOR_SUBPARTS): Turn into a function and handle
        polynomial numbers of units.
        (SET_TYPE_VECTOR_SUBPARTS): Likewise.
        (valid_vector_subparts_p): New function.
        (build_vector_type): Remove temporary shim and take the number
        of units as a poly_uint64 rather than an int.
        (build_opaque_vector_type): Take the number of units as a
        poly_uint64 rather than an int.
        * tree.c (build_vector_from_ctor): Handle polynomial
        TYPE_VECTOR_SUBPARTS.
        (type_hash_canon_hash, type_cache_hasher::equal): Likewise.
        (uniform_vector_p, vector_type_mode, build_vector): Likewise.
        (build_vector_from_val): If the number of units is variable,
        use build_vec_duplicate_cst for constant operands and
        VEC_DUPLICATE_EXPR otherwise.
        (make_vector_type): Remove temporary is_constant ().
        (build_vector_type, build_opaque_vector_type): Take the number of
        units as a poly_uint64 rather than an int.
        (check_vector_cst): Handle polynomial TYPE_VECTOR_SUBPARTS and
        VECTOR_CST_NELTS.
        * cfgexpand.c (expand_debug_expr): Likewise.
        * expr.c (count_type_elements, categorize_ctor_elements_1): Likewise.
        (store_constructor, expand_expr_real_1): Likewise.
        (const_scalar_mask_from_tree): Likewise.
        * fold-const-call.c (fold_const_reduction): Likewise.
        * fold-const.c (const_binop, const_unop, fold_convert_const): Likewise.
        (operand_equal_p, fold_vec_perm, fold_ternary_loc): Likewise.
        (native_encode_vector, vec_cst_ctor_to_array): Likewise.
        (fold_relational_const): Likewise.
        (native_interpret_vector): Likewise.  Change the size from an
        int to an unsigned int.
        * gimple-fold.c (gimple_fold_stmt_to_constant_1): Handle polynomial
        TYPE_VECTOR_SUBPARTS.
        (gimple_fold_indirect_ref, gimple_build_vector): Likewise.
        (gimple_build_vector_from_val): Use VEC_DUPLICATE_EXPR when
        duplicating a non-constant operand into a variable-length vector.
        * hsa-brig.c (hsa_op_immed::emit_to_buffer): Handle polynomial
        TYPE_VECTOR_SUBPARTS and VECTOR_CST_NELTS.
        * ipa-icf.c (sem_variable::equals): Likewise.
        * match.pd: Likewise.
        * omp-simd-clone.c (simd_clone_subparts): Likewise.
        * print-tree.c (print_node): Likewise.
        * stor-layout.c (layout_type): Likewise.
        * targhooks.c (default_builtin_vectorization_cost): Likewise.
        * tree-cfg.c (verify_gimple_comparison): Likewise.
        (verify_gimple_assign_binary): Likewise.
        (verify_gimple_assign_ternary): Likewise.
        (verify_gimple_assign_single): Likewise.
        * tree-pretty-print.c (dump_generic_node): Likewise.
        * tree-ssa-forwprop.c (simplify_vector_constructor): Likewise.
        (simplify_bitfield_ref, is_combined_permutation_identity): Likewise.
        * tree-vect-data-refs.c (vect_permute_store_chain): Likewise.
        (vect_grouped_load_supported, vect_permute_load_chain): Likewise.
        (vect_shift_permute_load_chain): Likewise.
        * tree-vect-generic.c (nunits_for_known_piecewise_op): Likewise.
        (expand_vector_condition, optimize_vector_constructor): Likewise.
        (lower_vec_perm, get_compute_type): Likewise.
        * tree-vect-loop.c (vect_determine_vectorization_factor): Likewise.
        (get_initial_defs_for_reduction, vect_transform_loop): Likewise.
        * tree-vect-patterns.c (vect_recog_bool_pattern): Likewise.
        (vect_recog_mask_conversion_pattern): Likewise.
        * tree-vect-slp.c (vect_supported_load_permutation_p): Likewise.
        (vect_get_constant_vectors, vect_transform_slp_perm_load): Likewise.
        * tree-vect-stmts.c (perm_mask_for_reverse): Likewise.
        (get_group_load_store_type, vectorizable_mask_load_store): Likewise.
        (vectorizable_bswap, simd_clone_subparts, vectorizable_assignment)
        (vectorizable_shift, vectorizable_operation, vectorizable_store)
        (vectorizable_load, vect_is_simple_cond, vectorizable_comparison)
        (supportable_widening_operation): Likewise.
        (supportable_narrowing_operation): Likewise.
        * tree-vector-builder.c (tree_vector_builder::binary_encoded_nelts):
        Likewise.
        * varasm.c (output_constant): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-data-refs.c (vect_permute_store_chain): Reorganize
        so that both the length == 3 and length != 3 cases set up their
        own permute vectors.  Add comments explaining why we know the
        number of elements is constant.
        (vect_permute_load_chain): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * machmode.h (mode_nunits): Change from unsigned char to
        poly_uint16_pod.
        (ONLY_FIXED_SIZE_MODES): New macro.
        (pod_mode::measurement_type, scalar_int_mode::measurement_type)
        (scalar_float_mode::measurement_type, scalar_mode::measurement_type)
        (complex_mode::measurement_type, fixed_size_mode::measurement_type):
        New typedefs.
        (mode_to_nunits): Return a poly_uint16 rather than an unsigned short.
        (GET_MODE_NUNITS): Return a constant if ONLY_FIXED_SIZE_MODES,
        or if measurement_type is not polynomial.
        * genmodes.c (ZERO_COEFFS): New macro.
        (emit_mode_nunits_inline): Make mode_nunits_inline return a
        poly_uint16.
        (emit_mode_nunits): Change the type of mode_nunits to poly_uint16_pod.
        Use ZERO_COEFFS when emitting initializers.
        * data-streamer.h (bp_pack_poly_value): New function.
        (bp_unpack_poly_value): Likewise.
        * lto-streamer-in.c (lto_input_mode_table): Use bp_unpack_poly_value
        for GET_MODE_NUNITS.
        * lto-streamer-out.c (lto_write_mode_table): Use bp_pack_poly_value
        for GET_MODE_NUNITS.
        * tree.c (make_vector_type): Remove temporary shim and make
        the real function take the number of units as a poly_uint64
        rather than an int.
        (build_vector_type_for_mode): Handle polynomial nunits.
        * dwarf2out.c (loc_descriptor, add_const_value_attribute): Likewise.
        * emit-rtl.c (const_vec_series_p_1): Likewise.
        (gen_rtx_CONST_VECTOR): Likewise.
        * fold-const.c (test_vec_duplicate_folding): Likewise.
        * genrecog.c (validate_pattern): Likewise.
        * optabs-query.c (can_vec_perm_var_p, can_mult_highpart_p): Likewise.
        * optabs-tree.c (expand_vec_cond_expr_p): Likewise.
        * optabs.c (expand_vector_broadcast, expand_binop_directly): Likewise.
        (shift_amt_for_vec_perm_mask, expand_vec_perm_var): Likewise.
        (expand_vec_cond_expr, expand_mult_highpart): Likewise.
        * rtlanal.c (subreg_get_info): Likewise.
        * tree-vect-data-refs.c (vect_grouped_store_supported): Likewise.
        (vect_grouped_load_supported): Likewise.
        * tree-vect-generic.c (type_for_widest_vector_mode): Likewise.
        * tree-vect-loop.c (have_whole_vector_shift): Likewise.
        * simplify-rtx.c (simplify_unary_operation_1): Likewise.
        (simplify_const_unary_operation, simplify_binary_operation_1)
        (simplify_const_binary_operation, simplify_ternary_operation)
        (test_vector_ops_duplicate, test_vector_ops): Likewise.
        (simplify_immed_subreg): Use GET_MODE_NUNITS on a fixed_size_mode
        instead of CONST_VECTOR_NUNITS.
        * varasm.c (output_constant_pool_2): Likewise.
        * rtx-vector-builder.c (rtx_vector_builder::build): Only include the
        explicit-encoded elements in the XVEC for variable-length vectors.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * lra-constraints.c (curr_insn_transform): Use partial_subreg_p.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * coretypes.h (fixed_size_mode): Declare.
        (fixed_size_mode_pod): New typedef.
        * builtins.h (target_builtins::x_apply_args_mode)
        (target_builtins::x_apply_result_mode): Change type to
        fixed_size_mode_pod.
        * builtins.c (apply_args_size, apply_result_size, result_vector)
        (expand_builtin_apply_args_1, expand_builtin_apply)
        (expand_builtin_return): Update accordingly.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * cse.c (hash_rtx_cb): Hash only the encoded elements.
        * cselib.c (cselib_hash_rtx): Likewise.
        * expmed.c (make_tree): Build VECTOR_CSTs directly from the
        CONST_VECTOR encoding.

2017-01-03  Jakub Jelinek  <jakub@redhat.com>
            Jeff Law  <law@redhat.com>

        PR target/83641
        * config/i386/i386.c (ix86_adjust_stack_and_probe_stack_clash): For
        noreturn probe, use gen_pop instead of ix86_emit_restore_reg_using_pop,
        only set RTX_FRAME_RELATED_P on both the push and pop if cfa_reg is sp
        and add REG_CFA_ADJUST_CFA notes in that case to both insns.

        PR target/83641
        * config/i386/i386.c (ix86_adjust_stack_and_probe_stack_clash): Do not
        explicitly probe *sp in a noreturn function if there were any callee
        register saves or frame pointer is needed.

2018-01-03  Jakub Jelinek  <jakub@redhat.com>

        PR debug/83621
        * cfgexpand.c (expand_debug_expr): Return NULL if mode is
        BLKmode for ternary, binary or unary expressions.

        PR debug/83645
        * var-tracking.c (delete_vta_debug_insn): New inline function.
        (delete_vta_debug_insns): Add USE_CFG argument, if true, walk just
        insns from get_insns () to NULL instead of each bb separately.
        Use delete_vta_debug_insn.  No longer static.
        (vt_debug_insns_local, variable_tracking_main_1): Adjust
        delete_vta_debug_insns callers.
        * rtl.h (delete_vta_debug_insns): Declare.
        * final.c (rest_of_handle_final): Call delete_vta_debug_insns
        instead of variable_tracking_main.

2018-01-03  Martin Sebor  <msebor@redhat.com>

        PR c/83559
        * doc/extend.texi (attribute const): Fix a typo.
        * ipa-pure-const.c ((warn_function_const, warn_function_pure): Avoid
        issuing -Wsuggest-attribute for void functions.

2018-01-03  Martin Sebor  <msebor@redhat.com>

        * gimple-ssa-warn-restrict.c (builtin_memref::builtin_memref): Use
        offset_int::from instead of wide_int::to_shwi.
        (maybe_diag_overlap): Remove assertion.
        Use HOST_WIDE_INT_PRINT_DEC instead of %lli.
        * gimple-ssa-sprintf.c (format_directive): Same.
        (parse_directive): Same.
        (sprintf_dom_walker::compute_format_length): Same.
        (try_substitute_return_value): Same.

2017-01-03  Jeff Law  <law@redhat.com>

        PR middle-end/83654
        * explow.c (anti_adjust_stack_and_probe_stack_clash): Test a
        non-constant residual for zero at runtime and avoid probing in
        that case.  Reorganize code for trailing problem to mirror handling
        of the residual.

2018-01-03  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

        PR tree-optimization/83501
        * tree-ssa-strlen.c (get_string_cst): New.
        (handle_char_store): Call get_string_cst.

2018-01-03  Martin Liska  <mliska@suse.cz>

        PR tree-optimization/83593
        * tree-ssa-strlen.c: Include tree-cfg.h.
        (strlen_check_and_optimize_stmt): Add new argument cleanup_eh.
        (strlen_dom_walker): Add new member variable m_cleanup_cfg.
        (strlen_dom_walker::strlen_dom_walker): Initialize m_cleanup_cfg
        to false.
        (strlen_dom_walker::before_dom_children): Call
        gimple_purge_dead_eh_edges. Dump tranformation with details
        dump flags.
        (strlen_dom_walker::before_dom_children): Update call by adding
        new argument cleanup_eh.
        (pass_strlen::execute): Return TODO_cleanup_cfg if needed.

2018-01-03  Martin Liska  <mliska@suse.cz>

        PR ipa/83549
        * cif-code.def (VARIADIC_THUNK): New enum value.
        * ipa-fnsummary.c (compute_fn_summary): Do not inline variadic
        thunks.

2018-01-03  Jan Beulich  <jbeulich@suse.com>

        * sse.md (mov<mode>_internal): Tighten condition for when to use
        vmovdqu<ssescalarsize> for TI and OI modes.

2018-01-03  Jakub Jelinek  <jakub@redhat.com>

        Update copyright years.

2018-01-03  Martin Liska  <mliska@suse.cz>

        PR ipa/83594
        * ipa-visibility.c (function_and_variable_visibility): Skip
        functions with noipa attribure.

2018-01-03  Jakub Jelinek  <jakub@redhat.com>

        * gcc.c (process_command): Update copyright notice dates.
        * gcov-dump.c (print_version): Ditto.
        * gcov.c (print_version): Ditto.
        * gcov-tool.c (print_version): Ditto.
        * gengtype.c (create_file): Ditto.
        * doc/cpp.texi: Bump @copying's copyright year.
        * doc/cppinternals.texi: Ditto.
        * doc/gcc.texi: Ditto.
        * doc/gccint.texi: Ditto.
        * doc/gcov.texi: Ditto.
        * doc/install.texi: Ditto.
        * doc/invoke.texi: Ditto.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * vector-builder.h (vector_builder::m_full_nelts): Change from
        unsigned int to poly_uint64.
        (vector_builder::full_nelts): Update prototype accordingly.
        (vector_builder::new_vector): Likewise.
        (vector_builder::encoded_full_vector_p): Handle polynomial full_nelts.
        (vector_builder::operator ==): Likewise.
        (vector_builder::finalize): Likewise.
        * int-vector-builder.h (int_vector_builder::int_vector_builder):
        Take the number of elements as a poly_uint64 rather than an
        unsigned int.
        * vec-perm-indices.h (vec_perm_indices::m_nelts_per_input): Change
        from unsigned int to poly_uint64.
        (vec_perm_indices::vec_perm_indices): Update prototype accordingly.
        (vec_perm_indices::new_vector): Likewise.
        (vec_perm_indices::length): Likewise.
        (vec_perm_indices::nelts_per_input): Likewise.
        (vec_perm_indices::input_nelts): Likewise.
        * vec-perm-indices.c (vec_perm_indices::new_vector): Take the
        number of elements per input as a poly_uint64 rather than an
        unsigned int.  Use the original encoding for variable-length
        vectors, rather than clamping each individual element.
        For the second and subsequent elements in each pattern,
        clamp the step and base before clamping their sum.
        (vec_perm_indices::series_p): Handle polynomial element counts.
        (vec_perm_indices::all_in_range_p): Likewise.
        (vec_perm_indices_to_tree): Likewise.
        (vec_perm_indices_to_rtx): Likewise.
        * tree-vect-stmts.c (vect_gen_perm_mask_any): Likewise.
        * tree-vector-builder.c (tree_vector_builder::new_unary_operation)
        (tree_vector_builder::new_binary_operation): Handle polynomial
        element counts.  Return false if we need to know the number
        of elements at compile time.
        * fold-const.c (fold_vec_perm): Punt if the number of elements
        isn't known at compile time.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * vec-perm-indices.h (vec_perm_builder): Change element type
        from HOST_WIDE_INT to poly_int64.
        (vec_perm_indices::element_type): Update accordingly.
        (vec_perm_indices::clamp): Handle polynomial element_types.
        * vec-perm-indices.c (vec_perm_indices::series_p): Likewise.
        (vec_perm_indices::all_in_range_p): Likewise.
        (tree_to_vec_perm_builder): Check for poly_int64 trees rather
        than shwi trees.
        * vector-builder.h (vector_builder::stepped_sequence_p): Handle
        polynomial vec_perm_indices element types.
        * int-vector-builder.h (int_vector_builder::equal_p): Likewise.
        * fold-const.c (fold_vec_perm): Likewise.
        * optabs.c (shift_amt_for_vec_perm_mask): Likewise.
        * tree-vect-generic.c (lower_vec_perm): Likewise.
        * tree-vect-slp.c (vect_transform_slp_perm_load): Likewise.
        * config/aarch64/aarch64.c (aarch64_evpc_tbl): Cast d->perm
        element type to HOST_WIDE_INT.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * alias.c (addr_side_effect_eval): Take the size as a poly_int64
        rather than an int.  Use plus_constant.
        (memrefs_conflict_p): Take the sizes as poly_int64s rather than ints.
        Take the offset "c" as a poly_int64 rather than a HOST_WIDE_INT.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * calls.c (emit_call_1, expand_call): Change struct_value_size from
        a HOST_WIDE_INT to a poly_int64.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * calls.c (load_register_parameters): Cope with polynomial
        mode sizes.  Require a constant size for BLKmode parameters
        that aren't described by a PARALLEL.  If BLOCK_REG_PADDING
        forces a parameter to be padded at the lsb end in order to
        fill a complete number of words, require the parameter size
        to be ordered wrt UNITS_PER_WORD.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * reload1.c (spill_stack_slot_width): Change element type
        from unsigned int to poly_uint64_pod.
        (alter_reg): Treat mode sizes as polynomial.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * reload.c (complex_word_subreg_p): New function.
        (reload_inner_reg_of_subreg, push_reload): Use it.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * lra-constraints.c (process_alt_operands): Reject matched
        operands whose sizes aren't ordered.
        (match_reload): Refer to this check here.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * builtins.c (expand_ifn_atomic_compare_exchange_into_call): Assert
        that the mode size is in the set {1, 2, 4, 8, 16}.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * var-tracking.c (adjust_mems): Treat mode sizes as polynomial.
        Use plus_constant instead of gen_rtx_PLUS.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * config/cr16/cr16-protos.h (cr16_push_rounding): Declare.
        * config/cr16/cr16.h (PUSH_ROUNDING): Move implementation to...
        * config/cr16/cr16.c (cr16_push_rounding): ...this new function.
        * config/h8300/h8300-protos.h (h8300_push_rounding): Declare.
        * config/h8300/h8300.h (PUSH_ROUNDING): Move implementation to...
        * config/h8300/h8300.c (h8300_push_rounding): ...this new function.
        * config/i386/i386-protos.h (ix86_push_rounding): Declare.
        * config/i386/i386.h (PUSH_ROUNDING): Move implementation to...
        * config/i386/i386.c (ix86_push_rounding): ...this new function.
        * config/m32c/m32c-protos.h (m32c_push_rounding): Take and return
        a poly_int64.
        * config/m32c/m32c.c (m32c_push_rounding): Likewise.
        * config/m68k/m68k-protos.h (m68k_push_rounding): Declare.
        * config/m68k/m68k.h (PUSH_ROUNDING): Move implementation to...
        * config/m68k/m68k.c (m68k_push_rounding): ...this new function.
        * config/pdp11/pdp11-protos.h (pdp11_push_rounding): Declare.
        * config/pdp11/pdp11.h (PUSH_ROUNDING): Move implementation to...
        * config/pdp11/pdp11.c (pdp11_push_rounding): ...this new function.
        * config/stormy16/stormy16-protos.h (xstormy16_push_rounding): Declare.
        * config/stormy16/stormy16.h (PUSH_ROUNDING): Move implementation to...
        * config/stormy16/stormy16.c (xstormy16_push_rounding): ...this new
        function.
        * expr.c (emit_move_resolve_push): Treat the input and result
        of PUSH_ROUNDING as a poly_int64.
        (emit_move_complex_push, emit_single_push_insn_1): Likewise.
        (emit_push_insn): Likewise.
        * lra-eliminations.c (mark_not_eliminable): Likewise.
        * recog.c (push_operand): Likewise.
        * reload1.c (elimination_effects): Likewise.
        * rtlanal.c (nonzero_bits1): Likewise.
        * calls.c (store_one_arg): Likewise.  Require the padding to be
        known at compile time.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * expr.c (emit_single_push_insn_1): Treat mode sizes as polynomial.
        Use plus_constant instead of gen_rtx_PLUS.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * auto-inc-dec.c (set_inc_state): Take the mode size as a poly_int64
        rather than an int.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * expr.c (expand_expr_real_1): Use tree_to_poly_uint64
        instead of int_size_in_bytes when handling VIEW_CONVERT_EXPRs
        via stack temporaries.  Treat the mode size as polynomial too.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * expr.c (expand_expr_real_2): When handling conversions involving
        unions, apply tree_to_poly_uint64 to the TYPE_SIZE rather than
        multiplying int_size_in_bytes by BITS_PER_UNIT.  Treat GET_MODE_BISIZE
        as a poly_uint64 too.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * rtlanal.c (subreg_get_info): Handle polynomial mode sizes.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * combine.c (can_change_dest_mode): Handle polynomial
        REGMODE_NATURAL_SIZE.
        * expmed.c (store_bit_field_1): Likewise.
        * expr.c (store_constructor): Likewise.
        * emit-rtl.c (validate_subreg): Operate on polynomial mode sizes
        and polynomial REGMODE_NATURAL_SIZE.
        (gen_lowpart_common): Likewise.
        * reginfo.c (record_subregs_of_mode): Likewise.
        * rtlanal.c (read_modify_subreg_p): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * internal-fn.c (expand_vector_ubsan_overflow): Handle polynomial
        numbers of elements.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * match.pd: Cope with polynomial numbers of vector elements.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * fold-const.c (fold_indirect_ref_1): Handle polynomial offsets
        in a POINTER_PLUS_EXPR.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * omp-simd-clone.c (simd_clone_subparts): New function.
        (simd_clone_init_simd_arrays): Use it instead of TYPE_VECTOR_SUBPARTS.
        (ipa_simd_modify_function_body): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-generic.c (nunits_for_known_piecewise_op): New function.
        (expand_vector_piecewise): Use it instead of TYPE_VECTOR_SUBPARTS.
        (expand_vector_addition, add_rshift, expand_vector_divmod): Likewise.
        (expand_vector_condition, vector_element): Likewise.
        (subparts_gt): New function.
        (get_compute_type): Use subparts_gt.
        (count_type_subparts): Delete.
        (expand_vector_operations_1): Use subparts_gt instead of
        count_type_subparts.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-data-refs.c (vect_no_alias_p): Replace with...
        (vect_compile_time_alias): ...this new function.  Do the calculation
        on poly_ints rather than trees.
        (vect_prune_runtime_alias_test_list): Update call accordingly.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-slp.c (vect_build_slp_tree_1): Handle polynomial
        numbers of units.
        (vect_schedule_slp_instance): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-slp.c (vect_get_and_check_slp_defs): Reject
        constant and extern definitions for variable-length vectors.
        (vect_get_constant_vectors): Note that the number of units
        is known to be constant.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-stmts.c (vectorizable_conversion): Treat the number
        of units as polynomial.  Choose between WIDE and NARROW based
        on multiple_p.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-stmts.c (simd_clone_subparts): New function.
        (vectorizable_simd_clone_call): Use it instead of TYPE_VECTOR_SUBPARTS.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-stmts.c (vectorizable_call): Treat the number of
        vectors as polynomial.  Use build_index_vector for
        IFN_GOMP_SIMD_LANE.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-stmts.c (get_load_store_type): Treat the number of
        units as polynomial.  Reject VMAT_ELEMENTWISE and VMAT_STRIDED_SLP
        for variable-length vectors.
        (vectorizable_mask_load_store): Treat the number of units as
        polynomial, asserting that it is constant if the condition has
        already been enforced.
        (vectorizable_store, vectorizable_load): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-loop.c (vectorizable_live_operation): Treat the number
        of units as polynomial.  Punt if we can't tell at compile time
        which vector contains the final result.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-loop.c (vectorizable_induction): Treat the number
        of units as polynomial.  Punt on SLP inductions.  Use an integer
        VEC_SERIES_EXPR for variable-length integer reductions.  Use a
        cast of such a series for variable-length floating-point
        reductions.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree.h (build_index_vector): Declare.
        * tree.c (build_index_vector): New function.
        * tree-vect-loop.c (get_initial_defs_for_reduction): Treat the number
        of units as polynomial, forcibly converting it to a constant if
        vectorizable_reduction has already enforced the condition.
        (vect_create_epilog_for_reduction): Likewise.  Use build_index_vector
        to create a {1,2,3,...} vector.
        (vectorizable_reduction): Treat the number of units as polynomial.
        Choose vectype_in based on the largest scalar element size rather
        than the smallest number of units.  Enforce the restrictions
        relied on above.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-data-refs.c (vector_alignment_reachable_p): Treat the
        number of units as polynomial.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * target.h (vector_sizes, auto_vector_sizes): New typedefs.
        * target.def (autovectorize_vector_sizes): Return the vector sizes
        by pointer, using vector_sizes rather than a bitmask.
        * targhooks.h (default_autovectorize_vector_sizes): Update accordingly.
        * targhooks.c (default_autovectorize_vector_sizes): Likewise.
        * config/aarch64/aarch64.c (aarch64_autovectorize_vector_sizes):
        Likewise.
        * config/arc/arc.c (arc_autovectorize_vector_sizes): Likewise.
        * config/arm/arm.c (arm_autovectorize_vector_sizes): Likewise.
        * config/i386/i386.c (ix86_autovectorize_vector_sizes): Likewise.
        * config/mips/mips.c (mips_autovectorize_vector_sizes): Likewise.
        * omp-general.c (omp_max_vf): Likewise.
        * omp-low.c (omp_clause_aligned_alignment): Likewise.
        * optabs-query.c (can_vec_mask_load_store_p): Likewise.
        * tree-vect-loop.c (vect_analyze_loop): Likewise.
        * tree-vect-slp.c (vect_slp_bb): Likewise.
        * doc/tm.texi: Regenerate.
        * tree-vectorizer.h (current_vector_size): Change from an unsigned int
        to a poly_uint64.
        * tree-vect-stmts.c (get_vectype_for_scalar_type_and_size): Take
        the vector size as a poly_uint64 rather than an unsigned int.
        (current_vector_size): Change from an unsigned int to a poly_uint64.
        (get_vectype_for_scalar_type): Update accordingly.
        * tree.h (build_truth_vector_type): Take the size and number of
        units as a poly_uint64 rather than an unsigned int.
        (build_vector_type): Add a temporary overload that takes
        the number of units as a poly_uint64 rather than an unsigned int.
        * tree.c (make_vector_type): Likewise.
        (build_truth_vector_type): Take the number of units as a poly_uint64
        rather than an unsigned int.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * target.def (get_mask_mode): Take the number of units and length
        as poly_uint64s rather than unsigned ints.
        * targhooks.h (default_get_mask_mode): Update accordingly.
        * targhooks.c (default_get_mask_mode): Likewise.
        * config/i386/i386.c (ix86_get_mask_mode): Likewise.
        * doc/tm.texi: Regenerate.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * omp-general.h (omp_max_vf): Return a poly_uint64 instead of an int.
        * omp-general.c (omp_max_vf): Likewise.
        * omp-expand.c (omp_adjust_chunk_size): Update call to omp_max_vf.
        (expand_omp_simd): Handle polynomial safelen.
        * omp-low.c (omplow_simd_context): Add a default constructor.
        (omplow_simd_context::max_vf): Change from int to poly_uint64.
        (lower_rec_simd_input_clauses): Update accordingly.
        (lower_rec_input_clauses): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vectorizer.h (vect_nunits_for_cost): New function.
        * tree-vect-loop.c (vect_model_reduction_cost): Use it.
        * tree-vect-slp.c (vect_analyze_slp_cost_1): Likewise.
        (vect_analyze_slp_cost): Likewise.
        * tree-vect-stmts.c (vect_model_store_cost): Likewise.
        (vect_model_load_cost): Likewise.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vect-slp.c (vect_record_max_nunits, vect_build_slp_tree_1)
        (vect_build_slp_tree_2, vect_build_slp_tree): Change max_nunits
        from an unsigned int * to a poly_uint64_pod *.
        (calculate_unrolling_factor): New function.
        (vect_analyze_slp_instance): Use it.  Track polynomial max_nunits.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * tree-vectorizer.h (_slp_instance::unrolling_factor): Change
        from an unsigned int to a poly_uint64.
        (_loop_vec_info::slp_unrolling_factor): Likewise.
        (_loop_vec_info::vectorization_factor): Change from an int
        to a poly_uint64.
        (MAX_VECTORIZATION_FACTOR): Bump from 64 to INT_MAX.
        (vect_get_num_vectors): New function.
        (vect_update_max_nunits, vect_vf_for_cost): Likewise.
        (vect_get_num_copies): Use vect_get_num_vectors.
        (vect_analyze_data_ref_dependences): Change max_vf from an int *
        to an unsigned int *.
        (vect_analyze_data_refs): Change min_vf from an int * to a
        poly_uint64 *.
        (vect_transform_slp_perm_load): Take the vf as a poly_uint64 rather
        than an unsigned HOST_WIDE_INT.
        * tree-vect-data-refs.c (vect_analyze_possibly_independent_ddr)
        (vect_analyze_data_ref_dependence): Change max_vf from an int *
        to an unsigned int *.
        (vect_analyze_data_ref_dependences): Likewise.
        (vect_compute_data_ref_alignment): Handle polynomial vf.
        (vect_enhance_data_refs_alignment): Likewise.
        (vect_prune_runtime_alias_test_list): Likewise.
        (vect_shift_permute_load_chain): Likewise.
        (vect_supportable_dr_alignment): Likewise.
        (dependence_distance_ge_vf): Take the vectorization factor as a
        poly_uint64 rather than an unsigned HOST_WIDE_INT.
        (vect_analyze_data_refs): Change min_vf from an int * to a
        poly_uint64 *.
        * tree-vect-loop-manip.c (vect_gen_scalar_loop_niters): Take
        vfm1 as a poly_uint64 rather than an int.  Make the same change
        for the returned bound_scalar.
        (vect_gen_vector_loop_niters): Handle polynomial vf.
        (vect_do_peeling): Likewise.  Update call to
        vect_gen_scalar_loop_niters and handle polynomial bound_scalars.
        (vect_gen_vector_loop_niters_mult_vf): Assert that the vf must
        be constant.
        * tree-vect-loop.c (vect_determine_vectorization_factor)
        (vect_update_vf_for_slp, vect_analyze_loop_2): Handle polynomial vf.
        (vect_get_known_peeling_cost): Likewise.
        (vect_estimate_min_profitable_iters, vectorizable_reduction): Likewise.
        (vect_worthwhile_without_simd_p, vectorizable_induction): Likewise.
        (vect_transform_loop): Likewise.  Use the lowest possible VF when
        updating the upper bounds of the loop.
        (vect_min_worthwhile_factor): Make static.  Return an unsigned int
        rather than an int.
        * tree-vect-slp.c (vect_attempt_slp_rearrange_stmts): Cope with
        polynomial unroll factors.
        (vect_analyze_slp_cost_1, vect_analyze_slp_instance): Likewise.
        (vect_make_slp_decision): Likewise.
        (vect_supported_load_permutation_p): Likewise, and polynomial
        vf too.
        (vect_analyze_slp_cost): Handle polynomial vf.
        (vect_slp_analyze_node_operations): Likewise.
        (vect_slp_analyze_bb_1): Likewise.
        (vect_transform_slp_perm_load): Take the vf as a poly_uint64 rather
        than an unsigned HOST_WIDE_INT.
        * tree-vect-stmts.c (vectorizable_simd_clone_call, vectorizable_store)
        (vectorizable_load): Handle polynomial vf.
        * tree-vectorizer.c (simduid_to_vf::vf): Change from an int to
        a poly_uint64.
        (adjust_simduid_builtins, shrink_simd_arrays): Update accordingly.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

        * match.pd: Handle bit operations involving three constants
        and try to fold one pair.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-vect-loop-manip.c: Include gimple-fold.h.
        (slpeel_make_loop_iterate_ntimes): Add step, final_iv and
        niters_maybe_zero parameters.  Handle other cases besides a step of 1.
        (vect_gen_vector_loop_niters): Add a step_vector_ptr parameter.
        Add a path that uses a step of VF instead of 1, but disable it
        for now.
        (vect_do_peeling): Add step_vector, niters_vector_mult_vf_var
        and niters_no_overflow parameters.  Update calls to
        slpeel_make_loop_iterate_ntimes and vect_gen_vector_loop_niters.
        Create a new SSA name if the latter choses to use a ste other
        than zero, and return it via niters_vector_mult_vf_var.
        * tree-vect-loop.c (vect_transform_loop): Update calls to
        vect_do_peeling, vect_gen_vector_loop_niters and
        slpeel_make_loop_iterate_ntimes.
        * tree-vectorizer.h (slpeel_make_loop_iterate_ntimes, vect_do_peeling)
        (vect_gen_vector_loop_niters): Update declarations after above changes.

2018-01-02  Michael Meissner  <meissner@linux.vnet.ibm.com>

        * config/rs6000/rs6000.md (floor<mode>2): Add support for IEEE
        128-bit round to integer instructions.
        (ceil<mode>2): Likewise.
        (btrunc<mode>2): Likewise.
        (round<mode>2): Likewise.

2018-01-02  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        * config/rs6000/rs6000-string.c (expand_block_move): Allow the use of
        unaligned VSX load/store on P8/P9.
        (expand_block_clear): Allow the use of unaligned VSX
        load/store on P8/P9.

2018-01-02  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        * config/rs6000/rs6000-p8swap.c (swap_feeds_both_load_and_store):
        New function.
        (rs6000_analyze_swaps): Mark a web unoptimizable if it contains a
        swap associated with both a load and a store.

2018-01-02  Andrew Waterman  <andrew@sifive.com>

        * config/riscv/linux.h (ICACHE_FLUSH_FUNC): New.
        * config/riscv/riscv.md (clear_cache): Use it.

2018-01-02  Artyom Skrobov  <tyomitch@gmail.com>

        * web.c: Remove out-of-date comment.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * expr.c (fixup_args_size_notes): Check that any existing
        REG_ARGS_SIZE notes are correct, and don't try to re-add them.
        (emit_single_push_insn_1): Move stack_pointer_delta adjustment to...
        (emit_single_push_insn): ...here.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * rtl.h (CONST_VECTOR_ELT): Redefine to const_vector_elt.
        (const_vector_encoded_nelts): New function.
        (CONST_VECTOR_NUNITS): Redefine to use GET_MODE_NUNITS.
        (const_vector_int_elt, const_vector_elt): Declare.
        * emit-rtl.c (const_vector_int_elt_1): New function.
        (const_vector_elt): Likewise.
        * simplify-rtx.c (simplify_immed_subreg): Avoid taking the address
        of CONST_VECTOR_ELT.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * expr.c: Include rtx-vector-builder.h.
        (const_vector_mask_from_tree): Use rtx_vector_builder and operate
        directly on the tree encoding.
        (const_vector_from_tree): Likewise.
        * optabs.c: Include rtx-vector-builder.h.
        (expand_vec_perm_var): Use rtx_vector_builder and create a repeating
        sequence of "u" values.
        * vec-perm-indices.c: Include rtx-vector-builder.h.
        (vec_perm_indices_to_rtx): Use rtx_vector_builder and operate
        directly on the vec_perm_indices encoding.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * doc/rtl.texi (const_vector): Describe new encoding scheme.
        * Makefile.in (OBJS): Add rtx-vector-builder.o.
        * rtx-vector-builder.h: New file.
        * rtx-vector-builder.c: Likewise.
        * rtl.h (rtx_def::u2): Add a const_vector field.
        (CONST_VECTOR_NPATTERNS): New macro.
        (CONST_VECTOR_NELTS_PER_PATTERN): Likewise.
        (CONST_VECTOR_DUPLICATE_P): Likewise.
        (CONST_VECTOR_STEPPED_P): Likewise.
        (CONST_VECTOR_ENCODED_ELT): Likewise.
        (const_vec_duplicate_p): Check for a duplicated vector encoding.
        (unwrap_const_vec_duplicate): Likewise.
        (const_vec_series_p): Check for a non-duplicated vector encoding.
        Say that the function only returns true for integer vectors.
        * emit-rtl.c: Include rtx-vector-builder.h.
        (gen_const_vec_duplicate_1): Delete.
        (gen_const_vector): Call gen_const_vec_duplicate instead of
        gen_const_vec_duplicate_1.
        (const_vec_series_p_1): Operate directly on the CONST_VECTOR encoding.
        (gen_const_vec_duplicate): Use rtx_vector_builder.
        (gen_const_vec_series): Likewise.
        (gen_rtx_CONST_VECTOR): Likewise.
        * config/powerpcspe/powerpcspe.c: Include rtx-vector-builder.h.
        (swap_const_vector_halves): Take an rtx pointer rather than rtx.
        Build a new vector rather than modifying a CONST_VECTOR in-place.
        (handle_special_swappables): Update call accordingly.
        * config/rs6000/rs6000-p8swap.c: Include rtx-vector-builder.h.
        (swap_const_vector_halves): Take an rtx pointer rather than rtx.
        Build a new vector rather than modifying a CONST_VECTOR in-place.
        (handle_special_swappables): Update call accordingly.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * simplify-rtx.c (simplify_const_binary_operation): Use
        CONST_VECTOR_ELT instead of XVECEXP.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * tree-cfg.c (verify_gimple_assign_ternary): Allow the size of
        the selector elements to be different from the data elements
        if the selector is a VECTOR_CST.
        * tree-vect-stmts.c (vect_gen_perm_mask_any): Use a vector of
        ssizetype for the selector.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs.c (shift_amt_for_vec_perm_mask): Try using series_p
        before testing each element individually.
        * tree-vect-generic.c (lower_vec_perm): Likewise.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * selftest.h (selftest::vec_perm_indices_c_tests): Declare.
        * selftest-run-tests.c (selftest::run_tests): Call it.
        * vector-builder.h (vector_builder::operator ==): New function.
        (vector_builder::operator !=): Likewise.
        * vec-perm-indices.h (vec_perm_indices::series_p): Declare.
        (vec_perm_indices::all_from_input_p): New function.
        * vec-perm-indices.c (vec_perm_indices::series_p): Likewise.
        (test_vec_perm_12, selftest::vec_perm_indices_c_tests): Likewise.
        * fold-const.c (fold_ternary_loc): Use tree_to_vec_perm_builder
        instead of reading the VECTOR_CST directly.  Detect whether both
        vector inputs are the same before constructing the vec_perm_indices,
        and update the number of inputs argument accordingly.  Use the
        utility functions added above.  Only construct sel2 if we need to.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs.c (expand_vec_perm_var): Use an explicit encoding for
        the broadcast of the low byte.
        (expand_mult_highpart): Use an explicit encoding for the permutes.
        * optabs-query.c (can_mult_highpart_p): Likewise.
        * tree-vect-loop.c (calc_vec_perm_mask_for_shift): Likewise.
        * tree-vect-stmts.c (perm_mask_for_reverse): Likewise.
        (vectorizable_bswap): Likewise.
        * tree-vect-data-refs.c (vect_grouped_store_supported): Use an
        explicit encoding for the power-of-2 permutes.
        (vect_permute_store_chain): Likewise.
        (vect_grouped_load_supported): Likewise.
        (vect_permute_load_chain): Likewise.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * vec-perm-indices.h (vec_perm_indices_to_tree): Declare.
        * vec-perm-indices.c (vec_perm_indices_to_tree): New function.
        * tree-ssa-forwprop.c (simplify_vector_constructor): Use it.
        * tree-vect-slp.c (vect_transform_slp_perm_load): Likewise.
        * tree-vect-stmts.c (vectorizable_bswap): Likewise.
        (vect_gen_perm_mask_any): Likewise.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * int-vector-builder.h: New file.
        * vec-perm-indices.h: Include int-vector-builder.h.
        (vec_perm_indices): Redefine as an int_vector_builder.
        (auto_vec_perm_indices): Delete.
        (vec_perm_builder): Redefine as a stand-alone class.
        (vec_perm_indices::vec_perm_indices): New function.
        (vec_perm_indices::clamp): Likewise.
        * vec-perm-indices.c: Include fold-const.h and tree-vector-builder.h.
        (vec_perm_indices::new_vector): New function.
        (vec_perm_indices::new_expanded_vector): Update for new
        vec_perm_indices class.
        (vec_perm_indices::rotate_inputs): New function.
        (vec_perm_indices::all_in_range_p): Operate directly on the
        encoded form, without computing elided elements.
        (tree_to_vec_perm_builder): Operate directly on the VECTOR_CST
        encoding.  Update for new vec_perm_indices class.
        * optabs.c (expand_vec_perm_const): Create a vec_perm_indices for
        the given vec_perm_builder.
        (expand_vec_perm_var): Update vec_perm_builder constructor.
        (expand_mult_highpart): Use vec_perm_builder instead of
        auto_vec_perm_indices.
        * optabs-query.c (can_mult_highpart_p): Use vec_perm_builder and
        vec_perm_indices instead of auto_vec_perm_indices.  Use a single
        or double series encoding as appropriate.
        * fold-const.c (fold_ternary_loc): Use vec_perm_builder and
        vec_perm_indices instead of auto_vec_perm_indices.
        * tree-ssa-forwprop.c (simplify_vector_constructor): Likewise.
        * tree-vect-data-refs.c (vect_grouped_store_supported): Likewise.
        (vect_permute_store_chain): Likewise.
        (vect_grouped_load_supported): Likewise.
        (vect_permute_load_chain): Likewise.
        (vect_shift_permute_load_chain): Likewise.
        * tree-vect-slp.c (vect_build_slp_tree_1): Likewise.
        (vect_transform_slp_perm_load): Likewise.
        (vect_schedule_slp_instance): Likewise.
        * tree-vect-stmts.c (perm_mask_for_reverse): Likewise.
        (vectorizable_mask_load_store): Likewise.
        (vectorizable_bswap): Likewise.
        (vectorizable_store): Likewise.
        (vectorizable_load): Likewise.
        * tree-vect-generic.c (lower_vec_perm): Use vec_perm_builder and
        vec_perm_indices instead of auto_vec_perm_indices.  Use
        tree_to_vec_perm_builder to read the vector from a tree.
        * tree-vect-loop.c (calc_vec_perm_mask_for_shift): Take a
        vec_perm_builder instead of a vec_perm_indices.
        (have_whole_vector_shift): Use vec_perm_builder and
        vec_perm_indices instead of auto_vec_perm_indices.  Leave the
        truncation to calc_vec_perm_mask_for_shift.
        (vect_create_epilog_for_reduction): Likewise.
        * config/aarch64/aarch64.c (expand_vec_perm_d::perm): Change
        from auto_vec_perm_indices to vec_perm_indices.
        (aarch64_expand_vec_perm_const_1): Use rotate_inputs on d.perm
        instead of changing individual elements.
        (aarch64_vectorize_vec_perm_const): Use new_vector to install
        the vector in d.perm.
        * config/arm/arm.c (expand_vec_perm_d::perm): Change
        from auto_vec_perm_indices to vec_perm_indices.
        (arm_expand_vec_perm_const_1): Use rotate_inputs on d.perm
        instead of changing individual elements.
        (arm_vectorize_vec_perm_const): Use new_vector to install
        the vector in d.perm.
        * config/powerpcspe/powerpcspe.c (rs6000_expand_extract_even):
        Update vec_perm_builder constructor.
        (rs6000_expand_interleave): Likewise.
        * config/rs6000/rs6000.c (rs6000_expand_extract_even): Likewise.
        (rs6000_expand_interleave): Likewise.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs-query.c (can_vec_perm_var_p): Check whether lowering
        to qimode could truncate the indices.
        * optabs.c (expand_vec_perm_var): Likewise.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * Makefile.in (OBJS): Add vec-perm-indices.o.
        * vec-perm-indices.h: New file.
        * vec-perm-indices.c: Likewise.
        * target.h (vec_perm_indices): Replace with a forward class
        declaration.
        (auto_vec_perm_indices): Move to vec-perm-indices.h.
        * optabs.h: Include vec-perm-indices.h.
        (expand_vec_perm): Delete.
        (selector_fits_mode_p, expand_vec_perm_var): Declare.
        (expand_vec_perm_const): Declare.
        * target.def (vec_perm_const_ok): Replace with...
        (vec_perm_const): ...this new hook.
        * doc/tm.texi.in (TARGET_VECTORIZE_VEC_PERM_CONST_OK): Replace with...
        (TARGET_VECTORIZE_VEC_PERM_CONST): ...this new hook.
        * doc/tm.texi: Regenerate.
        * optabs.def (vec_perm_const): Delete.
        * doc/md.texi (vec_perm_const): Likewise.
        (vec_perm): Refer to TARGET_VECTORIZE_VEC_PERM_CONST.
        * expr.c (expand_expr_real_2): Use expand_vec_perm_const rather than
        expand_vec_perm for constant permutation vectors.  Assert that
        the mode of variable permutation vectors is the integer equivalent
        of the mode that is being permuted.
        * optabs-query.h (selector_fits_mode_p): Declare.
        * optabs-query.c: Include vec-perm-indices.h.
        (selector_fits_mode_p): New function.
        (can_vec_perm_const_p): Check whether targetm.vectorize.vec_perm_const
        is defined, instead of checking whether the vec_perm_const_optab
        exists.  Use targetm.vectorize.vec_perm_const instead of
        targetm.vectorize.vec_perm_const_ok.  Check whether the indices
        fit in the vector mode before using a variable permute.
        * optabs.c (shift_amt_for_vec_perm_mask): Take a mode and a
        vec_perm_indices instead of an rtx.
        (expand_vec_perm): Replace with...
        (expand_vec_perm_const): ...this new function.  Take the selector
        as a vec_perm_indices rather than an rtx.  Also take the mode of
        the selector.  Update call to shift_amt_for_vec_perm_mask.
        Use targetm.vectorize.vec_perm_const instead of vec_perm_const_optab.
        Use vec_perm_indices::new_expanded_vector to expand the original
        selector into bytes.  Check whether the indices fit in the vector
        mode before using a variable permute.
        (expand_vec_perm_var): Make global.
        (expand_mult_highpart): Use expand_vec_perm_const.
        * fold-const.c: Includes vec-perm-indices.h.
        * tree-ssa-forwprop.c: Likewise.
        * tree-vect-data-refs.c: Likewise.
        * tree-vect-generic.c: Likewise.
        * tree-vect-loop.c: Likewise.
        * tree-vect-slp.c: Likewise.
        * tree-vect-stmts.c: Likewise.
        * config/aarch64/aarch64-protos.h (aarch64_expand_vec_perm_const):
        Delete.
        * config/aarch64/aarch64-simd.md (vec_perm_const<mode>): Delete.
        * config/aarch64/aarch64.c (aarch64_expand_vec_perm_const)
        (aarch64_vectorize_vec_perm_const_ok): Fuse into...
        (aarch64_vectorize_vec_perm_const): ...this new function.
        (TARGET_VECTORIZE_VEC_PERM_CONST_OK): Delete.
        (TARGET_VECTORIZE_VEC_PERM_CONST): Redefine.
        * config/arm/arm-protos.h (arm_expand_vec_perm_const): Delete.
        * config/arm/vec-common.md (vec_perm_const<mode>): Delete.
        * config/arm/arm.c (TARGET_VECTORIZE_VEC_PERM_CONST_OK): Delete.
        (TARGET_VECTORIZE_VEC_PERM_CONST): Redefine.
        (arm_expand_vec_perm_const, arm_vectorize_vec_perm_const_ok): Merge
        into...
        (arm_vectorize_vec_perm_const): ...this new function.  Explicitly
        check for NEON modes.
        * config/i386/i386-protos.h (ix86_expand_vec_perm_const): Delete.
        * config/i386/sse.md (VEC_PERM_CONST, vec_perm_const<mode>): Delete.
        * config/i386/i386.c (ix86_expand_vec_perm_const_1): Update comment.
        (ix86_expand_vec_perm_const, ix86_vectorize_vec_perm_const_ok): Merge
        into...
        (ix86_vectorize_vec_perm_const): ...this new function.  Incorporate
        the old VEC_PERM_CONST conditions.
        * config/ia64/ia64-protos.h (ia64_expand_vec_perm_const): Delete.
        * config/ia64/vect.md (vec_perm_const<mode>): Delete.
        * config/ia64/ia64.c (ia64_expand_vec_perm_const)
        (ia64_vectorize_vec_perm_const_ok): Merge into...
        (ia64_vectorize_vec_perm_const): ...this new function.
        * config/mips/loongson.md (vec_perm_const<mode>): Delete.
        * config/mips/mips-msa.md (vec_perm_const<mode>): Delete.
        * config/mips/mips-ps-3d.md (vec_perm_constv2sf): Delete.
        * config/mips/mips-protos.h (mips_expand_vec_perm_const): Delete.
        * config/mips/mips.c (mips_expand_vec_perm_const)
        (mips_vectorize_vec_perm_const_ok): Merge into...
        (mips_vectorize_vec_perm_const): ...this new function.
        * config/powerpcspe/altivec.md (vec_perm_constv16qi): Delete.
        * config/powerpcspe/paired.md (vec_perm_constv2sf): Delete.
        * config/powerpcspe/spe.md (vec_perm_constv2si): Delete.
        * config/powerpcspe/vsx.md (vec_perm_const<mode>): Delete.
        * config/powerpcspe/powerpcspe-protos.h (altivec_expand_vec_perm_const)
        (rs6000_expand_vec_perm_const): Delete.
        * config/powerpcspe/powerpcspe.c (TARGET_VECTORIZE_VEC_PERM_CONST_OK):
        Delete.
        (TARGET_VECTORIZE_VEC_PERM_CONST): Redefine.
        (altivec_expand_vec_perm_const_le): Take each operand individually.
        Operate on constant selectors rather than rtxes.
        (altivec_expand_vec_perm_const): Likewise.  Update call to
        altivec_expand_vec_perm_const_le.
        (rs6000_expand_vec_perm_const): Delete.
        (rs6000_vectorize_vec_perm_const_ok): Delete.
        (rs6000_vectorize_vec_perm_const): New function.
        (rs6000_do_expand_vec_perm): Take a vec_perm_builder instead of
        an element count and rtx array.
        (rs6000_expand_extract_even): Update call accordingly.
        (rs6000_expand_interleave): Likewise.
        * config/rs6000/altivec.md (vec_perm_constv16qi): Delete.
        * config/rs6000/paired.md (vec_perm_constv2sf): Delete.
        * config/rs6000/vsx.md (vec_perm_const<mode>): Delete.
        * config/rs6000/rs6000-protos.h (altivec_expand_vec_perm_const)
        (rs6000_expand_vec_perm_const): Delete.
        * config/rs6000/rs6000.c (TARGET_VECTORIZE_VEC_PERM_CONST_OK): Delete.
        (TARGET_VECTORIZE_VEC_PERM_CONST): Redefine.
        (altivec_expand_vec_perm_const_le): Take each operand individually.
        Operate on constant selectors rather than rtxes.
        (altivec_expand_vec_perm_const): Likewise.  Update call to
        altivec_expand_vec_perm_const_le.
        (rs6000_expand_vec_perm_const): Delete.
        (rs6000_vectorize_vec_perm_const_ok): Delete.
        (rs6000_vectorize_vec_perm_const): New function.  Remove stray
        reference to the SPE evmerge intructions.
        (rs6000_do_expand_vec_perm): Take a vec_perm_builder instead of
        an element count and rtx array.
        (rs6000_expand_extract_even): Update call accordingly.
        (rs6000_expand_interleave): Likewise.
        * config/sparc/sparc.md (vec_perm_constv8qi): Delete in favor of...
        * config/sparc/sparc.c (sparc_vectorize_vec_perm_const): ...this
        new function.
        (TARGET_VECTORIZE_VEC_PERM_CONST): Redefine.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs.c (expand_vec_perm_1): Assert that SEL has an integer
        vector mode and that that mode matches the mode of the data
        being permuted.
        (expand_vec_perm): Split handling of non-CONST_VECTOR selectors
        out into expand_vec_perm_var.  Do all CONST_VECTOR handling here,
        directly using expand_vec_perm_1 when forcing selectors into
        registers.
        (expand_vec_perm_var): New function, split out from expand_vec_perm.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs-query.h (can_vec_perm_p): Delete.
        (can_vec_perm_var_p, can_vec_perm_const_p): Declare.
        * optabs-query.c (can_vec_perm_p): Split into...
        (can_vec_perm_var_p, can_vec_perm_const_p): ...these two functions.
        (can_mult_highpart_p): Use can_vec_perm_const_p to test whether a
        particular selector is valid.
        * tree-ssa-forwprop.c (simplify_vector_constructor): Likewise.
        * tree-vect-data-refs.c (vect_grouped_store_supported): Likewise.
        (vect_grouped_load_supported): Likewise.
        (vect_shift_permute_load_chain): Likewise.
        * tree-vect-slp.c (vect_build_slp_tree_1): Likewise.
        (vect_transform_slp_perm_load): Likewise.
        * tree-vect-stmts.c (perm_mask_for_reverse): Likewise.
        (vectorizable_bswap): Likewise.
        (vect_gen_perm_mask_checked): Likewise.
        * fold-const.c (fold_ternary_loc): Likewise.  Don't take
        implementations of variable permutation vectors into account
        when deciding which selector to use.
        * tree-vect-loop.c (have_whole_vector_shift): Don't check whether
        vec_perm_const_optab is supported; instead use can_vec_perm_const_p
        with a false third argument.
        * tree-vect-generic.c (lower_vec_perm): Use can_vec_perm_const_p
        to test whether the constant selector is valid and can_vec_perm_var_p
        to test whether a variable selector is valid.

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs-query.h (can_vec_perm_p): Take a const vec_perm_indices *.
        * optabs-query.c (can_vec_perm_p): Likewise.
        * fold-const.c (fold_vec_perm): Take a const vec_perm_indices &
        instead of vec_perm_indices.
        * tree-vectorizer.h (vect_gen_perm_mask_any): Likewise,
        (vect_gen_perm_mask_checked): Likewise,
        * tree-vect-stmts.c (vect_gen_perm_mask_any): Likewise,
        (vect_gen_perm_mask_checked): Likewise,

2018-01-02  Richard Sandiford  <richard.sandiford@linaro.org>

        * optabs-query.h (qimode_for_vec_perm): Declare.
        * optabs-query.c (can_vec_perm_p): Split out qimode search to...
        (qimode_for_vec_perm): ...this new function.
        * optabs.c (expand_vec_perm): Use qimode_for_vec_perm.

2018-01-02  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        * rtlanal.c (canonicalize_condition): Return 0 if final rtx
        does not have a conditional at the top.

2018-01-02  Richard Biener  <rguenther@suse.de>

        * ipa-inline.c (big_speedup_p): Fix expression.

2018-01-02  Jan Hubicka  <hubicka@ucw.cz>

        PR target/81616
        * config/i386/x86-tune-costs.h: Increase cost of integer load costs
        for generic 4->6.

2018-01-02  Jan Hubicka  <hubicka@ucw.cz>

        PR target/81616
        Generic tuning.
        * x86-tune-costs.h (generic_cost): Reduce cost of FDIV 20->17,
        cost of sqrt 20->14, DIVSS 18->13, DIVSD 32->17, SQRtSS 30->14
        and SQRTsD 58->18, cond_not_taken_branch_cost. 2->1. Increase
        cond_taken_branch_cost 3->4.

2018-01-01  Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/83581
        * tree-loop-distribution.c (pass_loop_distribution::execute): Return
        TODO_cleanup_cfg if any changes have been made.

        PR middle-end/83608
        * expr.c (store_expr_with_bounds): Use simplify_gen_subreg instead of
        convert_modes if target mode has the right side, but different mode
        class.

        PR middle-end/83609
        * expr.c (expand_assignment): Fix up a typo in simplify_gen_subreg
        last argument when extracting from CONCAT.  If either from_real or
        from_imag is NULL, use expansion through memory.  If result is not
        a CONCAT and simplify_gen_subreg fails, try to simplify_gen_subreg
        the parts directly to inner mode, if even that fails, use expansion
        through memory.

        PR middle-end/83623
        * expmed.c (expand_shift_1): For 2-byte rotates by BITS_PER_UNIT,
        check for bswap in mode rather than HImode and use that in expand_unop
        too.
\f
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