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2017-07-01cfg.c (scale_bbs_frequencies): New function.Jan Hubicka1-1/+2
* cfg.c (scale_bbs_frequencies): New function. * cfg.h (scale_bbs_frequencies): Declare it. * cfgloopanal.c (single_likely_exit): Cleanup. * cfgloopmanip.c (scale_loop_frequencies): Take profile_probability as parameter. (scale_loop_profile): Likewise. (loop_version): Likewise. (create_empty_loop_on_edge): Update. * cfgloopmanip.h (scale_loop_frequencies, scale_loop_profile, scale_loop_frequencies, scale_loop_profile, loopify, loop_version): Update prototypes. * modulo-sched.c (sms_schedule): Update. * predict.c (unlikely_executed_edge_p): Also check probability. (probably_never_executed_edge_p): Fix typo. * tree-if-conv.c (version_loop_for_if_conversion): Update. * tree-parloops.c (gen_parallel_loop): Update. * tree-ssa-loop-ivcanon.c (try_peel_loop): Update. * tree-ssa-loop-manip.c (tree_transform_and_unroll_loop): Update. * tree-ssa-loop-split.c (split_loop): Update. * tree-ssa-loop-unswitch.c (tree_unswitch_loop): Update. * tree-vect-loop-manip.c (vect_do_peeling): Update. (vect_loop_versioning): Update. * tree-vect-loop.c (scale_profile_for_vect_loop): Update. From-SVN: r249872
2017-06-29asan.c (asan_emit_stack_protection): Update.Jan Hubicka1-3/+6
* asan.c (asan_emit_stack_protection): Update. (create_cond_insert_point): Update. * auto-profile.c (afdo_propagate_circuit): Update. * basic-block.h (struct edge_def): Turn probability to profile_probability. (EDGE_FREQUENCY): Update. * bb-reorder.c (find_traces_1_round): Update. (better_edge_p): Update. (sanitize_hot_paths): Update. * cfg.c (unchecked_make_edge): Initialize probability to uninitialized. (make_single_succ_edge): Update. (check_bb_profile): Update. (dump_edge_info): Update. (update_bb_profile_for_threading): Update. * cfganal.c (connect_infinite_loops_to_exit): Initialize new edge probabilitycount to 0. * cfgbuild.c (compute_outgoing_frequencies): Update. * cfgcleanup.c (try_forward_edges): Update. (outgoing_edges_match): Update. (try_crossjump_to_edge): Update. * cfgexpand.c (expand_gimple_cond): Update make_single_succ_edge. (expand_gimple_tailcall): Update. (construct_init_block): Use make_single_succ_edge. (construct_exit_block): Use make_single_succ_edge. * cfghooks.c (verify_flow_info): Update. (redirect_edge_succ_nodup): Update. (split_edge): Update. (account_profile_record): Update. * cfgloopanal.c (single_likely_exit): Update. * cfgloopmanip.c (scale_loop_profile): Update. (set_zero_probability): Remove. (duplicate_loop_to_header_edge): Update. * cfgloopmanip.h (loop_version): Update prototype. * cfgrtl.c (try_redirect_by_replacing_jump): Update. (force_nonfallthru_and_redirect): Update. (update_br_prob_note): Update. (rtl_verify_edges): Update. (purge_dead_edges): Update. (rtl_lv_add_condition_to_bb): Update. * cgraph.c: (cgraph_edge::redirect_call_stmt_to_calle): Update. * cgraphunit.c (init_lowered_empty_function): Update. (cgraph_node::expand_thunk): Update. * cilk-common.c: Include profile-count.h * dojump.c (inv): Remove. (jumpifnot): Update. (jumpifnot_1): Update. (do_jump_1): Update. (do_jump): Update. (do_jump_by_parts_greater_rtx): Update. (do_compare_rtx_and_jump): Update. * dojump.h (jumpifnot, jumpifnot_1, jumpif_1, jumpif, do_jump, do_jump_1. do_compare_rtx_and_jump): Update prototype. * dwarf2cfi.c: Include profile-count.h * except.c (dw2_build_landing_pads): Use make_single_succ_edge. (sjlj_emit_dispatch_table): Likewise. * explow.c: Include profile-count.h * expmed.c (emit_store_flag_force): Update. (do_cmp_and_jump): Update. * expr.c (compare_by_pieces_d::generate): Update. (compare_by_pieces_d::finish_mode): Update. (emit_block_move_via_loop): Update. (store_expr_with_bounds): Update. (store_constructor): Update. (expand_expr_real_2): Update. (expand_expr_real_1): Update. * expr.h (try_casesi, try_tablejump): Update prototypes. * gimple-pretty-print.c (dump_probability): Update. (dump_profile): New. (dump_gimple_label): Update. (dump_gimple_bb_header): Update. * graph.c (draw_cfg_node_succ_edges): Update. * hsa-gen.c (convert_switch_statements): Update. * ifcvt.c (cheap_bb_rtx_cost_p): Update. (find_if_case_1): Update. (find_if_case_2): Update. * internal-fn.c (expand_arith_overflow_result_store): Update. (expand_addsub_overflow): Update. (expand_neg_overflow): Update. (expand_mul_overflow): Update. (expand_vector_ubsan_overflow): Update. * ipa-cp.c (good_cloning_opportunity_p): Update. * ipa-split.c (split_function): Use make_single_succ_edge. * ipa-utils.c (ipa_merge_profiles): Update. * loop-doloop.c (add_test): Update. (doloop_modify): Update. * loop-unroll.c (compare_and_jump_seq): Update. (unroll_loop_runtime_iterations): Update. * lra-constraints.c (lra_inheritance): Update. * lto-streamer-in.c (input_cfg): Update. * lto-streamer-out.c (output_cfg): Update. * mcf.c (adjust_cfg_counts): Update. * modulo-sched.c (sms_schedule): Update. * omp-expand.c (expand_omp_for_init_counts): Update. (extract_omp_for_update_vars): Update. (expand_omp_ordered_sink): Update. (expand_omp_for_ordered_loops): Update. (expand_omp_for_generic): Update. (expand_omp_for_static_nochunk): Update. (expand_omp_for_static_chunk): Update. (expand_cilk_for): Update. (expand_omp_simd): Update. (expand_omp_taskloop_for_outer): Update. (expand_omp_taskloop_for_inner): Update. * omp-simd-clone.c (simd_clone_adjust): Update. * optabs.c (expand_doubleword_shift): Update. (expand_abs): Update. (emit_cmp_and_jump_insn_1): Update. (expand_compare_and_swap_loop): Update. * optabs.h (emit_cmp_and_jump_insns): Update prototype. * predict.c (predictable_edge_p): Update. (edge_probability_reliable_p): Update. (set_even_probabilities): Update. (combine_predictions_for_insn): Update. (combine_predictions_for_bb): Update. (propagate_freq): Update. (estimate_bb_frequencies): Update. (force_edge_cold): Update. * profile-count.c (profile_count::dump): Add missing space into dump. (profile_count::debug): Add newline. (profile_count::differs_from_p): Explicitly convert to unsigned. (profile_count::stream_in): Update. (profile_probability::dump): New member function. (profile_probability::debug): New member function. (profile_probability::differs_from_p): New member function. (profile_probability::differs_lot_from_p): New member function. (profile_probability::stream_in): New member function. (profile_probability::stream_out): New member function. * profile-count.h (profile_count_quality): Rename to ... (profile_quality): ... this one. (profile_probability): New. (profile_count): Update. * profile.c (compute_branch_probabilities): Update. * recog.c (peep2_attempt): Update. * sched-ebb.c (schedule_ebbs): Update. * sched-rgn.c (find_single_block_region): Update. (compute_dom_prob_ps): Update. (schedule_region): Update. * sel-sched-ir.c (compute_succs_info): Update. * stmt.c (struct case_node): Update. (do_jump_if_equal): Update. (get_outgoing_edge_probs): Update. (conditional_probability): Update. (emit_case_dispatch_table): Update. (expand_case): Update. (expand_sjlj_dispatch_table): Update. (emit_case_nodes): Update. * targhooks.c: Update. * tracer.c (better_p): Update. (find_best_successor): Update. * trans-mem.c (expand_transaction): Update. * tree-call-cdce.c: Update. * tree-cfg.c (gimple_split_edge): Upate. (move_sese_region_to_fn): Upate. * tree-cfgcleanup.c (cleanup_control_expr_graph): Upate. * tree-eh.c (lower_resx): Upate. (cleanup_empty_eh_move_lp): Upate. * tree-if-conv.c (version_loop_for_if_conversion): Update. * tree-inline.c (copy_edges_for_bb): Update. (copy_cfg_body): Update. * tree-parloops.c (gen_parallel_loop): Update. * tree-profile.c (gimple_gen_ic_func_profiler): Update. (gimple_gen_time_profiler): Update. * tree-ssa-dce.c (remove_dead_stmt): Update. * tree-ssa-ifcombine.c (update_profile_after_ifcombine): Update. * tree-ssa-loop-im.c (execute_sm_if_changed): Update. * tree-ssa-loop-ivcanon.c (remove_exits_and_undefined_stmts): Update. (unloop_loops): Update. (try_peel_loop): Update. * tree-ssa-loop-manip.c (tree_transform_and_unroll_loop): Update. * tree-ssa-loop-split.c (connect_loops): Update. (split_loop): Update. * tree-ssa-loop-unswitch.c (tree_unswitch_loop): Update. (hoist_guard): Update. * tree-ssa-phionlycprop.c (propagate_rhs_into_lhs): Update. * tree-ssa-phiopt.c (replace_phi_edge_with_variable): Update. (value_replacement): Update. * tree-ssa-reassoc.c (branch_fixup): Update. * tree-ssa-tail-merge.c (replace_block_by): Update. * tree-ssa-threadupdate.c (remove_ctrl_stmt_and_useless_edges): Update. (create_edge_and_update_destination_phis): Update. (compute_path_counts): Update. (recompute_probabilities): Update. (update_joiner_offpath_counts): Update. (freqs_to_counts_path): Update. (duplicate_thread_path): Update. * tree-switch-conversion.c (hoist_edge_and_branch_if_true): Update. (struct switch_conv_info): Update. (gen_inbound_check): Update. * tree-vect-loop-manip.c (slpeel_add_loop_guard): Update. (vect_do_peeling): Update. (vect_loop_versioning): Update. * tree-vect-loop.c (scale_profile_for_vect_loop): Update. (optimize_mask_stores): Update. * ubsan.c (ubsan_expand_null_ifn): Update. * value-prof.c (gimple_divmod_fixed_value): Update. (gimple_divmod_fixed_value_transform): Update. (gimple_mod_pow2): Update. (gimple_mod_pow2_value_transform): Update. (gimple_mod_subtract): Update. (gimple_mod_subtract_transform): Update. (gimple_ic): Update. (gimple_stringop_fixed_value): Update. (gimple_stringops_transform): Update. * value-prof.h: Update. From-SVN: r249800
2017-06-04i386.c (make_resolver_func): Update.Jan Hubicka1-1/+1
2017-05-23 Jan Hubicka <hubicka@ucw.cz> * config/i386/i386.c (make_resolver_func): Update. * Makefile.in: Add profile-count.h and profile-count.o * auto-profile.c (afdo_indirect_call): Update to new API. (afdo_set_bb_count): Update. (afdo_propagate_edge): Update. (afdo_propagate_circuit): Update. (afdo_calculate_branch_prob): Update. (afdo_annotate_cfg): Update. * basic-block.h: Include profile-count.h (struct edge_def): Turn count to profile_count. (struct basic_block_def): Likewie. (REG_BR_PROB_BASE): Move to profile-count.h (RDIV): Move to profile-count.h * bb-reorder.c (max_entry_count): Turn to profile_count. (find_traces): Update. (rotate_loop):Update. (connect_traces):Update. (sanitize_hot_paths):Update. * bt-load.c (migrate_btr_defs): Update. * cfg.c (RDIV): Remove. (init_flow): Use alloc_block. (alloc_block): Uninitialize count. (unchecked_make_edge): Uninitialize count. (check_bb_profile): Update. (dump_edge_info): Update. (dump_bb_info): Update. (update_bb_profile_for_threading): Update. (scale_bbs_frequencies_int): Update. (scale_bbs_frequencies_gcov_type): Update. (scale_bbs_frequencies_profile_count): New. * cfg.h (update_bb_profile_for_threading): Update. (scale_bbs_frequencies_profile_count): Declare. * cfgbuild.c (compute_outgoing_frequencies): Update. (find_many_sub_basic_blocks): Update. * cfgcleanup.c (try_forward_edges): Update. (try_crossjump_to_edge): Update. * cfgexpand.c (expand_gimple_tailcall): Update. (construct_exit_block): Update. * cfghooks.c (verify_flow_info): Update. (dump_bb_for_graph): Update. (split_edge): Update. (make_forwarder_block): Update. (duplicate_block): Update. (account_profile_record): Update. * cfgloop.c (find_subloop_latch_edge_by_profile): Update. (get_estimated_loop_iterations): Update. * cfgloopanal.c (expected_loop_iterations_unbounded): Update. (single_likely_exit): Update. * cfgloopmanip.c (scale_loop_profile): Update. (loopify): Update. (set_zero_probability): Update. (lv_adjust_loop_entry_edge): Update. * cfgrtl.c (force_nonfallthru_and_redirect): Update. (purge_dead_edges): Update. (rtl_account_profile_record): Update. * cgraph.c (cgraph_node::create): Uninitialize count. (symbol_table::create_edge): Uninitialize count. (cgraph_update_edges_for_call_stmt_node): Update. (cgraph_edge::dump_edge_flags): Update. (cgraph_node::dump): Update. (cgraph_edge::maybe_hot_p): Update. * cgraph.h: Include profile-count.h (create_clone), create_edge, create_indirect_edge): Update. (cgraph_node): Turn count to profile_count. (cgraph_edge0: Likewise. (make_speculative, clone): Update. (create_edge): Update. (init_lowered_empty_function): Update. * cgraphclones.c (cgraph_edge::clone): Update. (duplicate_thunk_for_node): Update. (cgraph_node::create_clone): Update. * cgraphunit.c (cgraph_node::analyze): Update. (cgraph_node::expand_thunk): Update. * final.c (dump_basic_block_info): Update. * gimple-streamer-in.c (input_bb): Update. * gimple-streamer-out.c (output_bb): Update. * graphite.c (print_global_statistics): Update. (print_graphite_scop_statistics): Update. * hsa-brig.c: Include basic-block.h. * hsa-dump.c: Include basic-block.h. * hsa-gen.c (T sum_slice): Update. (convert_switch_statements):Update. * hsa-regalloc.c: Include basic-block.h. * ipa-chkp.c (chkp_produce_thunks): Update. * ipa-cp.c (struct caller_statistics): Update. (init_caller_stats): Update. (gather_caller_stats): Update. (ipcp_cloning_candidate_p): Update. (good_cloning_opportunity_p): Update. (get_info_about_necessary_edges): Update. (dump_profile_updates): Update. (update_profiling_info): Update. (update_specialized_profile): Update. (perhaps_add_new_callers): Update. (decide_about_value): Update. (ipa_cp_c_finalize): Update. * ipa-devirt.c (struct odr_type_warn_count): Update. (struct decl_warn_count): Update. (struct final_warning_record): Update. (possible_polymorphic_call_targets): Update. (ipa_devirt): Update. * ipa-fnsummary.c (redirect_to_unreachable): Update. * ipa-icf.c (sem_function::merge): Update. * ipa-inline-analysis.c (do_estimate_edge_time): Update. * ipa-inline.c (compute_uninlined_call_time): Update. (compute_inlined_call_time): Update. (want_inline_small_function_p): Update. (want_inline_self_recursive_call_p): Update. (edge_badness): Update. (lookup_recursive_calls): Update. (recursive_inlining): Update. (inline_small_functions): Update. (dump_overall_stats): Update. (dump_inline_stats): Update. * ipa-profile.c (ipa_profile_generate_summary): Update. (ipa_propagate_frequency): Update. (ipa_profile): Update. * ipa-prop.c (ipa_make_edge_direct_to_target): Update. * ipa-utils.c (ipa_merge_profiles): Update. * loop-doloop.c (doloop_modify): Update. * loop-unroll.c (report_unroll): Update. (unroll_loop_runtime_iterations): Update. * lto-cgraph.c (lto_output_edge): Update. (lto_output_node): Update. (input_node): Update. (input_edge): Update. (merge_profile_summaries): Update. * lto-streamer-in.c (input_cfg): Update. * lto-streamer-out.c (output_cfg): Update. * mcf.c (create_fixup_graph): Update. (adjust_cfg_counts): Update. (sum_edge_counts): Update. * modulo-sched.c (sms_schedule): Update. * postreload-gcse.c (eliminate_partially_redundant_load): Update. * predict.c (maybe_hot_count_p): Update. (probably_never_executed): Update. (dump_prediction): Update. (combine_predictions_for_bb): Update. (propagate_freq): Update. (handle_missing_profiles): Update. (counts_to_freqs): Update. (rebuild_frequencies): Update. (force_edge_cold): Update. * predict.h: Include profile-count.h (maybe_hot_count_p, counts_to_freqs): UPdate. * print-rtl-function.c: Do not include cfg.h * print-rtl.c: Include basic-block.h * profile-count.c: New file. * profile-count.h: New file. * profile.c (is_edge_inconsistent): Update. (correct_negative_edge_counts): Update. (is_inconsistent): Update. (set_bb_counts): Update. (read_profile_edge_counts): Update. (compute_frequency_overlap): Update. (compute_branch_probabilities): Update; Initialize and deinitialize gcov_count tables. (branch_prob): Update. * profile.h (bb_gcov_counts, edge_gcov_counts): New. (edge_gcov_count): New. (bb_gcov_count): New. * shrink-wrap.c (try_shrink_wrapping): Update. * tracer.c (better_p): Update. * trans-mem.c (expand_transaction): Update. (ipa_tm_insert_irr_call): Update. (ipa_tm_insert_gettmclone_call): Update. * tree-call-cdce.c: Update. * tree-cfg.c (gimple_duplicate_sese_region): Update. (gimple_duplicate_sese_tail): Update. (gimple_account_profile_record): Update. (execute_fixup_cfg): Update. * tree-inline.c (copy_bb): Update. (copy_edges_for_bb): Update. (initialize_cfun): Update. (freqs_to_counts): Update. (copy_cfg_body): Update. (expand_call_inline): Update. * tree-ssa-ifcombine.c (update_profile_after_ifcombine): Update. * tree-ssa-loop-ivcanon.c (unloop_loops): Update. (try_unroll_loop_completely): Update. (try_peel_loop): Update. * tree-ssa-loop-manip.c (tree_transform_and_unroll_loop): Update. * tree-ssa-loop-niter.c (estimate_numbers_of_iterations_loop): Update. * tree-ssa-loop-split.c (connect_loops): Update. * tree-ssa-loop-unswitch.c (hoist_guard): Update. * tree-ssa-reassoc.c (branch_fixup): Update. * tree-ssa-tail-merge.c (replace_block_by): Update. * tree-ssa-threadupdate.c (create_block_for_threading): Update. (compute_path_counts): Update. (update_profile): Update. (recompute_probabilities): Update. (update_joiner_offpath_counts): Update. (estimated_freqs_path): Update. (freqs_to_counts_path): Update. (clear_counts_path): Update. (ssa_fix_duplicate_block_edges): Update. (duplicate_thread_path): Update. * tree-switch-conversion.c (case_bit_test_cmp): Update. (struct switch_conv_info): Update. * tree-tailcall.c (decrease_profile): Update. * tree-vect-loop-manip.c (slpeel_add_loop_guard): Update. * tree-vect-loop.c (scale_profile_for_vect_loop): Update. * value-prof.c (check_counter): Update. (gimple_divmod_fixed_value): Update. (gimple_mod_pow2): Update. (gimple_mod_subtract): Update. (gimple_ic_transform): Update. (gimple_stringop_fixed_value): Update. * value-prof.h (gimple_ic): Update. * gcc.dg/tree-ssa/attr-hotcold-2.c: Update template. From-SVN: r248863
2017-03-08re PR tree-optimization/79943 (Loop splitting breaks with loops of pointer type)Andrew Haley1-1/+0
2017-03-08 Andrew Haley <aph@redhat.com> PR tree-optimization/79943 * tree-ssa-loop-split.c (compute_new_first_bound): When calculating the new upper bound, (END-BEG) should be added, not subtracted. From-SVN: r245974
2017-02-05re PR tree-optimization/79347 (vect_do_peeling is messing up profile)Jan Hubicka1-1/+2
PR tree-ssa/79347 * cfgloopmanip.c (lv_adjust_loop_entry_edge, loop_version): Add ELSE_PROB. * cfgloopmanip.h (loop_version): Update prototype. * modulo-sched.c (sms_schedule): Update call of loop_version. * tree-if-conv.c(version_loop_for_if_conversion): Likewise. * tree-parloops.c (gen_parallel_loop): Likewise. * tree-ssa-loop-manip.c (tree_transform_and_unroll_loop): Likewise. * tree-ssa-loop-split.c (split_loop): Likewise. * tree-ssa-loop-unswitch.c (tree_unswitch_loop): Likewise. * tree-vect-loop-manip.c (vect_loop_versioning): Likewise. * gcc.dg/tree-ssa/ifc-10.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-11.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-12.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-20040816-1.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-20040816-2.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-5.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-8.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-9.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-cd.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-pr56541.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-pr68583.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-pr69489-1.c: Match for profile mismatches. * gcc.dg/tree-ssa/ifc-pr69489-2.c: Match for profile mismatches. From-SVN: r245196
2017-01-23fix pr78384Michael Matz1-1/+1
PR tree-optimization/78384 * tree-ssa-loop-split.c (patch_loop_exit): Use correct edge. testsuite/ PR tree-optimization/78384 * gcc.dg/pr78384.c: New test. From-SVN: r244811
2017-01-05[bootstrap-O1] add initializers to avoid warnings at -O1Alexandre Oliva1-1/+1
Building with the bootstrap-O1 configuration option fails to compile a number of files due to AFAICT false-positive warnings about uses of uninitialized variables. This patch adds dummy initializers to silence them all. for gcc/ChangeLog * multiple_target.c (create_dispatcher_calls): Init e_next. * tree-ssa-loop-split.c (split_loop): Init border. * tree-vect-loop.c (vect_determine_vectorization_factor): Init scalar_type. From-SVN: r244086
2017-01-01Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r243994
2016-12-13Fix pr78725Michael Matz1-2/+5
PR tree-optimization/78725 * tree-ssa-loop-split.c (split_at_bb_p): Check for overflow and at correct use point. testsuite/ PR tree-optimization/78725 * gcc.dg/pr78725.c: New test. * gcc.dg/pr78725-2.c: New test. From-SVN: r243606
2016-10-26fix pr78060 pr78061 pr78088Michael Matz1-18/+45
PR tree-optimization/78060 PR tree-optimization/78061 PR tree-optimization/78088 * tree-ssa-loop-split.c (easy_exit_values): New function. (tree_ssa_split_loops): Use it. (compute_new_first_bound): Change order of operations, fix invalid use of types. testsuite/ * g++.dg/pr78060.C: New test. * gfortran.dg/pr78061.f: New test. * g++.dg/pr78088.C: New test. From-SVN: r241551
2016-10-24re PR tree-optimization/78076 (Conditional jump or move depends on ↵Richard Biener1-2/+2
uninitialised value @ tree-vect-loop.c:2307) 2016-10-24 Richard Biener <rguenther@suse.de> PR tree-optimization/78076 * tree-ssa-loop-split.c (tree_ssa_split_loops): Reset aux also on the loop tree root. From-SVN: r241467
2016-10-21tree-ssa-loop-split.c: Remove trailing spaces.Eric Botcazou1-3/+3
* tree-ssa-loop-split.c: Remove trailing spaces. * match.pd: Likewise. From-SVN: r241398
2016-10-20loop splittingMichael Matz1-0/+687
(approved at https://gcc.gnu.org/ml/gcc-patches/2015-12/msg00648.html ) * common.opt (-fsplit-loops): New flag. * passes.def (pass_loop_split): Add. * opts.c (default_options_table): Add OPT_fsplit_loops entry at -O3. (enable_fdo_optimizations): Add loop splitting. * timevar.def (TV_LOOP_SPLIT): Add. * tree-pass.h (make_pass_loop_split): Declare. * tree-ssa-loop-manip.h (rewrite_into_loop_closed_ssa_1): Declare. * tree-ssa-loop-unswitch.c: Include tree-ssa-loop-manip.h, * tree-ssa-loop-split.c: New file. * Makefile.in (OBJS): Add tree-ssa-loop-split.o. * doc/invoke.texi (fsplit-loops): Document. * doc/passes.texi (Loop optimization): Add paragraph about loop splitting. testsuite/ * gcc.dg/loop-split.c: New test. * gcc.dg/tree-ssa/ifc-9.c: Update. * gcc.dg/tree-ssa/ifc-10.c: Update. From-SVN: r241374