On Wed, Jun 9, 2021 at 1:32 PM Trevor Saunders <tbsau...@tbsaunde.org> wrote:
>
> On Wed, Jun 09, 2021 at 01:06:44PM +0200, Richard Biener wrote:
> > On Wed, Jun 9, 2021 at 2:48 AM Trevor Saunders <tbsau...@tbsaunde.org>
> > wrote:
> > >
> > > Hello,
> > >
> > > This makes things a good bit shorter, and reduces complexity by removing
> > > a bunch of index variables.
> > >
> > > bootstrapped and regtested on x86_64-linux-gnu, ok?
> >
> > I'd call the cases where you are able to remove the iterator variable
> > declarations obvious, but there are some where the element variable
> > remains declared and thus one wonders if the last elem initialization
> > is used. Splitting the patch into the obvious (pre-approved) and
> > not-so obvious parts would be nice. The not-so obvious pieces would
> > be more obvious if the retained decl were moved down to its first
> > use.
>
> Yeah, sorry its a long patch, and that's a sensible idea for making it
> more managable, sorry I didn't think of it the first time. There's also
> cases where people use the index within the loop for something, kind of
> peaking through the "abstraction" of the macro if you want to see it
> that way.
>
> > That said - how may FOR_EACH_VEC_ELT macro invocations
> > remain? Can we remove it?
>
> Very many, this is maybe a hundred of what started as about 1000 uses.
> There is certainly more cases that can be converted over, but I needed
> to stop at some point. There's also a bunch of cases that use the index
> for something, usually either checking if its the last element if
> printing a list, or using the index to index into the vector or
> something else. However I suppose those uses might be better as for
> (unsigned i = 0; i < vec.size (); i++). I'll see about spliting out the
> obvious cases and finding more of those and once that's done we can see
> about the rest.
OK, agreed.
Thanks,
Richard.
> thanks
>
> Trev
>
> >
> > Thanks,
> > Richard.
> >
> > > Trev
> > >
> > > gcc/analyzer/ChangeLog:
> > >
> > > * call-string.cc (call_string::call_string): Iterate over vec<>
> > > with range based for.
> > > (call_string::operator=): Likewise.
> > > (call_string::to_json): Likewise.
> > > (call_string::hash): Likewise.
> > > (call_string::calc_recursion_depth): Likewise.
> > > * checker-path.cc (checker_path::fixup_locations): Likewise.
> > > * constraint-manager.cc (equiv_class::equiv_class): Likewise.
> > > (equiv_class::to_json): Likewise.
> > > (equiv_class::hash): Likewise.
> > > (constraint_manager::constraint_manager): Likewise.
> > > (constraint_manager::operator=): Likewise.
> > > (constraint_manager::hash): Likewise.
> > > (constraint_manager::to_json): Likewise.
> > > (constraint_manager::add_unknown_constraint): Likewise.
> > > * engine.cc (impl_region_model_context::on_svalue_leak):
> > > Likewise.
> > > (on_liveness_change): Likewise.
> > > (impl_region_model_context::on_unknown_change): Likewise.
> > > * program-state.cc (extrinsic_state::to_json): Likewise.
> > > (sm_state_map::set_state): Likewise.
> > > * region-model.cc (make_test_compound_type): Likewise.
> > > (test_canonicalization_4): Likewise.
> > >
> > > gcc/ChangeLog:
> > >
> > > * auto-profile.c (afdo_find_equiv_class): Iterate over vec<>
> > > with range based for.
> > > * cgraphclones.c (cgraph_node::create_clone): Likewise.
> > > (cgraph_node::create_version_clone): Likewise.
> > > * dwarf2out.c (output_call_frame_info): Likewise.
> > > * gcc.c (do_specs_vec): Likewise.
> > > (do_spec_1): Likewise.
> > > (driver::set_up_specs): Likewise.
> > > * gimple-loop-jam.c (any_access_function_variant_p): Likewise.
> > > * ifcvt.c (cond_move_process_if_block): Likewise.
> > > * ipa-modref.c (modref_lattice::add_escape_point): Likewise.
> > > (analyze_parms): Likewise.
> > > (modref_write_escape_summary): Likewise.
> > > (update_escape_summary_1): Likewise.
> > > * ipa-prop.h (ipa_copy_agg_values): Likewise.
> > > (ipa_release_agg_values): Likewise.
> > > * lower-subreg.c (decompose_multiword_subregs): Likewise.
> > > * lto-streamer-out.c (DFS::DFS_write_tree_body): Likewise.
> > > (hash_tree): Likewise.
> > > (prune_offload_funcs): Likewise.
> > > * sel-sched-dump.c (dump_insn_vector): Likewise.
> > > * timevar.c (timer::named_items::print): Likewise.
> > > * tree-cfgcleanup.c (cleanup_control_flow_pre): Likewise.
> > > (cleanup_tree_cfg_noloop): Likewise.
> > > * tree-data-ref.c (dump_data_references): Likewise.
> > > (print_dir_vectors): Likewise.
> > > (print_dist_vectors): Likewise.
> > > (dump_data_dependence_relation): Likewise.
> > > (dump_data_dependence_relations): Likewise.
> > > (dump_dist_dir_vectors): Likewise.
> > > (dump_ddrs): Likewise.
> > > (prune_runtime_alias_test_list): Likewise.
> > > (create_runtime_alias_checks): Likewise.
> > > (free_subscripts): Likewise.
> > > (save_dist_v): Likewise.
> > > (save_dir_v): Likewise.
> > > (invariant_access_functions): Likewise.
> > > (same_access_functions): Likewise.
> > > (access_functions_are_affine_or_constant_p): Likewise.
> > > (compute_all_dependences): Likewise.
> > > (find_data_references_in_stmt): Likewise.
> > > (graphite_find_data_references_in_stmt): Likewise.
> > > (free_dependence_relations): Likewise.
> > > (free_data_refs): Likewise.
> > > * tree-into-ssa.c (dump_currdefs): Likewise.
> > > (rewrite_update_phi_arguments): Likewise.
> > > * tree-ssa-phiopt.c (cond_if_else_store_replacement): Likewise.
> > > * tree-ssa-propagate.c (clean_up_loop_closed_phi): Likewise.
> > > * tree-ssa-structalias.c (constraint_set_union): Likewise.
> > > (merge_node_constraints): Likewise.
> > > (move_complex_constraints): Likewise.
> > > (do_deref): Likewise.
> > > (get_constraint_for_address_of): Likewise.
> > > (get_constraint_for_1): Likewise.
> > > (process_all_all_constraints): Likewise.
> > > (make_constraints_to): Likewise.
> > > (handle_rhs_call): Likewise.
> > > * tree-vect-data-refs.c (vect_analyze_possibly_independent_ddr):
> > > Likewise.
> > > (vect_slp_analyze_node_dependences): Likewise.
> > > (vect_slp_analyze_instance_dependence): Likewise.
> > > (vect_record_base_alignments): Likewise.
> > > (vect_get_peeling_costs_all_drs): Likewise.
> > > (vect_peeling_supportable): Likewise.
> > > * tree-vectorizer.c (vec_info::~vec_info): Likewise.
> > > (vec_info::free_stmt_vec_infos): Likewise.
> > >
> > > gcc/c/ChangeLog:
> > >
> > > * c-parser.c (c_parser_translation_unit): Iterate over vec<>
> > > with range based for.
> > > (c_parser_postfix_expression): Likewise.
> > >
> > > gcc/cp/ChangeLog:
> > >
> > > * constexpr.c (cxx_eval_call_expression): Iterate over vec<>
> > > with range based for.
> > > (cxx_eval_store_expression): Likewise.
> > > (cxx_eval_loop_expr): Likewise.
> > > (cxx_eval_outermost_constant_expr): Likewise.
> > > * decl.c (wrapup_namespace_globals): Likewise.
> > > (cp_finish_decl): Likewise.
> > > (cxx_simulate_enum_decl): Likewise.
> > > * parser.c (cp_parser_postfix_expression): Likewise.
> > >
> > > Signed-off-by: Trevor Saunders <tbsau...@tbsaunde.org>
> > > ---
> > > gcc/analyzer/call-string.cc | 18 ++---
> > > gcc/analyzer/checker-path.cc | 4 +-
> > > gcc/analyzer/constraint-manager.cc | 73 +++++++----------
> > > gcc/analyzer/engine.cc | 12 +--
> > > gcc/analyzer/program-state.cc | 6 +-
> > > gcc/analyzer/region-model.cc | 6 +-
> > > gcc/auto-profile.c | 6 +-
> > > gcc/c/c-parser.c | 11 +--
> > > gcc/cgraphclones.c | 6 +-
> > > gcc/cp/constexpr.c | 23 ++----
> > > gcc/cp/decl.c | 15 ++--
> > > gcc/cp/parser.c | 4 +-
> > > gcc/dwarf2out.c | 2 +-
> > > gcc/gcc.c | 13 +--
> > > gcc/gimple-loop-jam.c | 4 +-
> > > gcc/ifcvt.c | 6 +-
> > > gcc/ipa-modref.c | 52 +++++-------
> > > gcc/ipa-prop.h | 15 +---
> > > gcc/lower-subreg.c | 11 +--
> > > gcc/lto-streamer-out.c | 12 +--
> > > gcc/sel-sched-dump.c | 5 +-
> > > gcc/timevar.c | 4 +-
> > > gcc/tree-cfgcleanup.c | 8 +-
> > > gcc/tree-data-ref.c | 123 +++++++++--------------------
> > > gcc/tree-into-ssa.c | 9 +--
> > > gcc/tree-ssa-phiopt.c | 7 +-
> > > gcc/tree-ssa-propagate.c | 4 +-
> > > gcc/tree-ssa-structalias.c | 78 +++++++-----------
> > > gcc/tree-vect-data-refs.c | 30 +++----
> > > gcc/tree-vectorizer.c | 9 +--
> > > 30 files changed, 183 insertions(+), 393 deletions(-)
> > >
> > > diff --git a/gcc/analyzer/call-string.cc b/gcc/analyzer/call-string.cc
> > > index 224b2e2fb0e..fc4db0f8741 100644
> > > --- a/gcc/analyzer/call-string.cc
> > > +++ b/gcc/analyzer/call-string.cc
> > > @@ -50,9 +50,7 @@ along with GCC; see the file COPYING3. If not see
> > > call_string::call_string (const call_string &other)
> > > : m_return_edges (other.m_return_edges.length ())
> > > {
> > > - const return_superedge *e;
> > > - int i;
> > > - FOR_EACH_VEC_ELT (other.m_return_edges, i, e)
> > > + for (const return_superedge *e : other.m_return_edges)
> > > m_return_edges.quick_push (e);
> > > }
> > >
> > > @@ -66,7 +64,7 @@ call_string::operator= (const call_string &other)
> > > m_return_edges.reserve (other.m_return_edges.length (), true);
> > > const return_superedge *e;
> > > int i;
> > > - FOR_EACH_VEC_ELT (other.m_return_edges, i, e)
> > > + for (const return_superedge *e : other.m_return_edges)
> > > m_return_edges.quick_push (e);
> > > return *this;
> > > }
> > > @@ -118,9 +116,7 @@ call_string::to_json () const
> > > {
> > > json::array *arr = new json::array ();
> > >
> > > - const return_superedge *e;
> > > - int i;
> > > - FOR_EACH_VEC_ELT (m_return_edges, i, e)
> > > + for (const return_superedge *e : m_return_edges)
> > > {
> > > json::object *e_obj = new json::object ();
> > > e_obj->set ("src_snode_idx",
> > > @@ -141,9 +137,7 @@ hashval_t
> > > call_string::hash () const
> > > {
> > > inchash::hash hstate;
> > > - int i;
> > > - const return_superedge *e;
> > > - FOR_EACH_VEC_ELT (m_return_edges, i, e)
> > > + for (const return_superedge *e : m_return_edges)
> > > hstate.add_ptr (e);
> > > return hstate.end ();
> > > }
> > > @@ -173,9 +167,7 @@ call_string::calc_recursion_depth () const
> > > = m_return_edges[m_return_edges.length () - 1];
> > >
> > > int result = 0;
> > > - const return_superedge *e;
> > > - int i;
> > > - FOR_EACH_VEC_ELT (m_return_edges, i, e)
> > > + for (const return_superedge *e : m_return_edges)
> > > if (e == top_return_sedge)
> > > ++result;
> > > return result;
> > > diff --git a/gcc/analyzer/checker-path.cc b/gcc/analyzer/checker-path.cc
> > > index 7d229bbf823..e6f838b7d52 100644
> > > --- a/gcc/analyzer/checker-path.cc
> > > +++ b/gcc/analyzer/checker-path.cc
> > > @@ -1001,9 +1001,7 @@ checker_path::add_final_event (const state_machine
> > > *sm,
> > > void
> > > checker_path::fixup_locations (pending_diagnostic *pd)
> > > {
> > > - checker_event *e;
> > > - int i;
> > > - FOR_EACH_VEC_ELT (m_events, i, e)
> > > + for (checker_event *e : m_events)
> > > e->set_location (pd->fixup_location (e->get_location ()));
> > > }
> > >
> > > diff --git a/gcc/analyzer/constraint-manager.cc
> > > b/gcc/analyzer/constraint-manager.cc
> > > index 4dadd200bee..318b2d8e890 100644
> > > --- a/gcc/analyzer/constraint-manager.cc
> > > +++ b/gcc/analyzer/constraint-manager.cc
> > > @@ -270,9 +270,7 @@ equiv_class::equiv_class (const equiv_class &other)
> > > : m_constant (other.m_constant), m_cst_sval (other.m_cst_sval),
> > > m_vars (other.m_vars.length ())
> > > {
> > > - int i;
> > > - const svalue *sval;
> > > - FOR_EACH_VEC_ELT (other.m_vars, i, sval)
> > > + for (const svalue *sval : other.m_vars)
> > > m_vars.quick_push (sval);
> > > }
> > >
> > > @@ -310,9 +308,7 @@ equiv_class::to_json () const
> > > json::object *ec_obj = new json::object ();
> > >
> > > json::array *sval_arr = new json::array ();
> > > - int i;
> > > - const svalue *sval;
> > > - FOR_EACH_VEC_ELT (m_vars, i, sval)
> > > + for (const svalue *sval : m_vars)
> > > sval_arr->append (sval->to_json ());
> > > ec_obj->set ("svals", sval_arr);
> > >
> > > @@ -337,9 +333,7 @@ equiv_class::hash () const
> > > inchash::hash hstate;
> > >
> > > inchash::add_expr (m_constant, hstate);
> > > - int i;
> > > - const svalue *sval;
> > > - FOR_EACH_VEC_ELT (m_vars, i, sval)
> > > + for (const svalue * sval : m_vars)
> > > hstate.add_ptr (sval);
> > > return hstate.end ();
> > > }
> > > @@ -620,13 +614,11 @@ constraint_manager::constraint_manager (const
> > > constraint_manager &other)
> > > m_constraints (other.m_constraints.length ()),
> > > m_mgr (other.m_mgr)
> > > {
> > > - int i;
> > > - equiv_class *ec;
> > > - FOR_EACH_VEC_ELT (other.m_equiv_classes, i, ec)
> > > + for (const equiv_class *ec : other.m_equiv_classes)
> > > m_equiv_classes.quick_push (new equiv_class (*ec));
> > > - constraint *c;
> > > - FOR_EACH_VEC_ELT (other.m_constraints, i, c)
> > > - m_constraints.quick_push (*c);
> > > +
> > > + for (const constraint &c : other.m_constraints)
> > > + m_constraints.quick_push (c);
> > > }
> > >
> > > /* constraint_manager's assignment operator. */
> > > @@ -637,15 +629,13 @@ constraint_manager::operator= (const
> > > constraint_manager &other)
> > > gcc_assert (m_equiv_classes.length () == 0);
> > > gcc_assert (m_constraints.length () == 0);
> > >
> > > - int i;
> > > - equiv_class *ec;
> > > m_equiv_classes.reserve (other.m_equiv_classes.length ());
> > > - FOR_EACH_VEC_ELT (other.m_equiv_classes, i, ec)
> > > + for (const equiv_class *ec : other.m_equiv_classes)
> > > m_equiv_classes.quick_push (new equiv_class (*ec));
> > > - constraint *c;
> > > +
> > > m_constraints.reserve (other.m_constraints.length ());
> > > - FOR_EACH_VEC_ELT (other.m_constraints, i, c)
> > > - m_constraints.quick_push (*c);
> > > + for (const constraint &c : other.m_constraints)
> > > + m_constraints.quick_push (c);
> > >
> > > return *this;
> > > }
> > > @@ -656,14 +646,11 @@ hashval_t
> > > constraint_manager::hash () const
> > > {
> > > inchash::hash hstate;
> > > - int i;
> > > - equiv_class *ec;
> > > - constraint *c;
> > >
> > > - FOR_EACH_VEC_ELT (m_equiv_classes, i, ec)
> > > + for (const equiv_class *ec : m_equiv_classes)
> > > hstate.merge_hash (ec->hash ());
> > > - FOR_EACH_VEC_ELT (m_constraints, i, c)
> > > - hstate.merge_hash (c->hash ());
> > > + for (const constraint &c : m_constraints)
> > > + hstate.merge_hash (c.hash ());
> > > return hstate.end ();
> > > }
> > >
> > > @@ -811,9 +798,7 @@ constraint_manager::to_json () const
> > > /* Equivalence classes. */
> > > {
> > > json::array *ec_arr = new json::array ();
> > > - int i;
> > > - equiv_class *ec;
> > > - FOR_EACH_VEC_ELT (m_equiv_classes, i, ec)
> > > + for (const equiv_class *ec : m_equiv_classes)
> > > ec_arr->append (ec->to_json ());
> > > cm_obj->set ("ecs", ec_arr);
> > > }
> > > @@ -821,10 +806,8 @@ constraint_manager::to_json () const
> > > /* Constraints. */
> > > {
> > > json::array *con_arr = new json::array ();
> > > - int i;
> > > - constraint *c;
> > > - FOR_EACH_VEC_ELT (m_constraints, i, c)
> > > - con_arr->append (c->to_json ());
> > > + for (const constraint &c : m_constraints)
> > > + con_arr->append (c.to_json ());
> > > cm_obj->set ("constraints", con_arr);
> > > }
> > >
> > > @@ -927,9 +910,7 @@ constraint_manager::add_unknown_constraint
> > > (equiv_class_id lhs_ec_id,
> > > equiv_class &lhs_ec_obj = lhs_ec_id.get_obj (*this);
> > > const equiv_class &rhs_ec_obj = rhs_ec_id.get_obj (*this);
> > >
> > > - int i;
> > > - const svalue *sval;
> > > - FOR_EACH_VEC_ELT (rhs_ec_obj.m_vars, i, sval)
> > > + for (const svalue *sval : rhs_ec_obj.m_vars)
> > > lhs_ec_obj.add (sval);
> > >
> > > if (rhs_ec_obj.m_constant)
> > > @@ -949,21 +930,21 @@ constraint_manager::add_unknown_constraint
> > > (equiv_class_id lhs_ec_id,
> > >
> > > /* Update the constraints. */
> > > constraint *c;
> > > - FOR_EACH_VEC_ELT (m_constraints, i, c)
> > > + for (constraint &c : m_constraints)
> > > {
> > > /* Update references to the rhs_ec so that
> > > they refer to the lhs_ec. */
> > > - if (c->m_lhs == rhs_ec_id)
> > > - c->m_lhs = lhs_ec_id;
> > > - if (c->m_rhs == rhs_ec_id)
> > > - c->m_rhs = lhs_ec_id;
> > > + if (c.m_lhs == rhs_ec_id)
> > > + c.m_lhs = lhs_ec_id;
> > > + if (c.m_rhs == rhs_ec_id)
> > > + c.m_rhs = lhs_ec_id;
> > >
> > > /* Renumber all constraints that refer to the final rhs_ec
> > > to the old rhs_ec, where the old final_ec now lives. */
> > > - if (c->m_lhs == final_ec_id)
> > > - c->m_lhs = rhs_ec_id;
> > > - if (c->m_rhs == final_ec_id)
> > > - c->m_rhs = rhs_ec_id;
> > > + if (c.m_lhs == final_ec_id)
> > > + c.m_lhs = rhs_ec_id;
> > > + if (c.m_rhs == final_ec_id)
> > > + c.m_rhs = rhs_ec_id;
> > > }
> > >
> > > /* We may now have self-comparisons due to the merger; these
> > > diff --git a/gcc/analyzer/engine.cc b/gcc/analyzer/engine.cc
> > > index 5b519fdf385..7444e7d6394 100644
> > > --- a/gcc/analyzer/engine.cc
> > > +++ b/gcc/analyzer/engine.cc
> > > @@ -121,9 +121,7 @@ void
> > > impl_region_model_context::on_svalue_leak (const svalue *sval)
> > >
> > > {
> > > - int sm_idx;
> > > - sm_state_map *smap;
> > > - FOR_EACH_VEC_ELT (m_new_state->m_checker_states, sm_idx, smap)
> > > + for (sm_state_map *smap : m_new_state->m_checker_states)
> > > smap->on_svalue_leak (sval, this);
> > > }
> > >
> > > @@ -132,9 +130,7 @@ impl_region_model_context::
> > > on_liveness_change (const svalue_set &live_svalues,
> > > const region_model *model)
> > > {
> > > - int sm_idx;
> > > - sm_state_map *smap;
> > > - FOR_EACH_VEC_ELT (m_new_state->m_checker_states, sm_idx, smap)
> > > + for (sm_state_map *smap : m_new_state->m_checker_states)
> > > smap->on_liveness_change (live_svalues, model, this);
> > > }
> > >
> > > @@ -142,9 +138,7 @@ void
> > > impl_region_model_context::on_unknown_change (const svalue *sval,
> > > bool is_mutable)
> > > {
> > > - int sm_idx;
> > > - sm_state_map *smap;
> > > - FOR_EACH_VEC_ELT (m_new_state->m_checker_states, sm_idx, smap)
> > > + for (sm_state_map *smap : m_new_state->m_checker_states)
> > > smap->on_unknown_change (sval, is_mutable, m_ext_state);
> > > }
> > >
> > > diff --git a/gcc/analyzer/program-state.cc b/gcc/analyzer/program-state.cc
> > > index 5c690b08fd3..e961d86dfc5 100644
> > > --- a/gcc/analyzer/program-state.cc
> > > +++ b/gcc/analyzer/program-state.cc
> > > @@ -112,7 +112,7 @@ extrinsic_state::to_json () const
> > > json::array *checkers_arr = new json::array ();
> > > unsigned i;
> > > state_machine *sm;
> > > - FOR_EACH_VEC_ELT (m_checkers, i, sm)
> > > + for (state_machine *sm : m_checkers)
> > > checkers_arr->append (sm->to_json ());
> > > ext_state_obj->set ("checkers", checkers_arr);
> > > }
> > > @@ -441,10 +441,8 @@ sm_state_map::set_state (const equiv_class &ec,
> > > const svalue *origin,
> > > const extrinsic_state &ext_state)
> > > {
> > > - int i;
> > > - const svalue *sval;
> > > bool any_changed = false;
> > > - FOR_EACH_VEC_ELT (ec.m_vars, i, sval)
> > > + for (const svalue *sval : ec.m_vars)
> > > any_changed |= impl_set_state (sval, state, origin, ext_state);
> > > return any_changed;
> > > }
> > > diff --git a/gcc/analyzer/region-model.cc b/gcc/analyzer/region-model.cc
> > > index c7038dd2d4b..8d1882337b2 100644
> > > --- a/gcc/analyzer/region-model.cc
> > > +++ b/gcc/analyzer/region-model.cc
> > > @@ -3413,7 +3413,7 @@ make_test_compound_type (const char *name, bool
> > > is_struct,
> > > tree fieldlist = NULL;
> > > int i;
> > > tree field;
> > > - FOR_EACH_VEC_ELT (*fields, i, field)
> > > + for (tree field : *fields)
> > > {
> > > gcc_assert (TREE_CODE (field) == FIELD_DECL);
> > > DECL_CONTEXT (field) = t;
> > > @@ -4231,9 +4231,7 @@ test_canonicalization_4 ()
> > > region_model_manager mgr;
> > > region_model model (&mgr);
> > >
> > > - unsigned i;
> > > - tree cst;
> > > - FOR_EACH_VEC_ELT (csts, i, cst)
> > > + for (tree cst : csts)
> > > model.get_rvalue (cst, NULL);
> > >
> > > model.canonicalize ();
> > > diff --git a/gcc/auto-profile.c b/gcc/auto-profile.c
> > > index 2a6d9a1fc24..9dc9eb5dd43 100644
> > > --- a/gcc/auto-profile.c
> > > +++ b/gcc/auto-profile.c
> > > @@ -1156,14 +1156,12 @@ afdo_find_equiv_class (bb_set *annotated_bb)
> > > FOR_ALL_BB_FN (bb, cfun)
> > > {
> > > vec<basic_block> dom_bbs;
> > > - basic_block bb1;
> > > - int i;
> > >
> > > if (bb->aux != NULL)
> > > continue;
> > > bb->aux = bb;
> > > dom_bbs = get_dominated_by (CDI_DOMINATORS, bb);
> > > - FOR_EACH_VEC_ELT (dom_bbs, i, bb1)
> > > + for (basic_block bb1 : dom_bbs)
> > > if (bb1->aux == NULL && dominated_by_p (CDI_POST_DOMINATORS, bb,
> > > bb1)
> > > && bb1->loop_father == bb->loop_father)
> > > {
> > > @@ -1175,7 +1173,7 @@ afdo_find_equiv_class (bb_set *annotated_bb)
> > > }
> > > }
> > > dom_bbs = get_dominated_by (CDI_POST_DOMINATORS, bb);
> > > - FOR_EACH_VEC_ELT (dom_bbs, i, bb1)
> > > + for (basic_block bb1 : dom_bbs)
> > > if (bb1->aux == NULL && dominated_by_p (CDI_DOMINATORS, bb, bb1)
> > > && bb1->loop_father == bb->loop_father)
> > > {
> > > diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
> > > index add33532a60..6eea27de68e 100644
> > > --- a/gcc/c/c-parser.c
> > > +++ b/gcc/c/c-parser.c
> > > @@ -1653,9 +1653,7 @@ c_parser_translation_unit (c_parser *parser)
> > > while (c_parser_next_token_is_not (parser, CPP_EOF));
> > > }
> > >
> > > - unsigned int i;
> > > - tree decl;
> > > - FOR_EACH_VEC_ELT (incomplete_record_decls, i, decl)
> > > + for (tree decl : incomplete_record_decls)
> > > if (DECL_SIZE (decl) == NULL_TREE && TREE_TYPE (decl) !=
> > > error_mark_node)
> > > error ("storage size of %q+D isn%'t known", decl);
> > >
> > > @@ -9354,10 +9352,8 @@ c_parser_postfix_expression (c_parser *parser)
> > > break;
> > > }
> > >
> > > - unsigned int i;
> > > - c_expr_t *p;
> > > - FOR_EACH_VEC_ELT (*cexpr_list, i, p)
> > > - *p = convert_lvalue_to_rvalue (loc, *p, true, true);
> > > + for (c_expr_t &p : *cexpr_list)
> > > + p = convert_lvalue_to_rvalue (loc, p, true, true);
> > > unsigned int nargs = check_tgmath_function
> > > (&(*cexpr_list)[0], 1);
> > > if (nargs == 0)
> > > {
> > > @@ -9565,6 +9561,7 @@ c_parser_postfix_expression (c_parser *parser)
> > > bool all_binary = true;
> > > bool all_decimal = true;
> > > hash_set<tree> tg_types;
> > > + unsigned i;
> > > FOR_EACH_VEC_ELT (tg_type, i, t)
> > > {
> > > if (TREE_CODE (t) == COMPLEX_TYPE)
> > > diff --git a/gcc/cgraphclones.c b/gcc/cgraphclones.c
> > > index 9f86463b42d..fc8eae76cbe 100644
> > > --- a/gcc/cgraphclones.c
> > > +++ b/gcc/cgraphclones.c
> > > @@ -362,7 +362,6 @@ cgraph_node::create_clone (tree new_decl,
> > > profile_count prof_count,
> > > {
> > > cgraph_node *new_node = symtab->create_empty ();
> > > cgraph_edge *e;
> > > - unsigned i;
> > > profile_count old_count = count;
> > > bool nonzero = count.ipa ().nonzero_p ();
> > >
> > > @@ -419,7 +418,7 @@ cgraph_node::create_clone (tree new_decl,
> > > profile_count prof_count,
> > > = vec_safe_copy (info->performed_splits);
> > > new_node->split_part = split_part;
> > >
> > > - FOR_EACH_VEC_ELT (redirect_callers, i, e)
> > > + for (cgraph_edge *e : redirect_callers)
> > > {
> > > /* Redirect calls to the old version node to point to its new
> > > version. The only exception is when the edge was proved to
> > > @@ -919,7 +918,6 @@ cgraph_node::create_version_clone (tree new_decl,
> > > {
> > > cgraph_node *new_version;
> > > cgraph_edge *e;
> > > - unsigned i;
> > >
> > > new_version = cgraph_node::create (new_decl);
> > >
> > > @@ -948,7 +946,7 @@ cgraph_node::create_version_clone (tree new_decl,
> > > e->clone (new_version, e->call_stmt,
> > > e->lto_stmt_uid, count, count,
> > > true);
> > > - FOR_EACH_VEC_ELT (redirect_callers, i, e)
> > > + for (cgraph_edge *e : redirect_callers)
> > > {
> > > /* Redirect calls to the old version node to point to its new
> > > version. */
> > > diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
> > > index 297f2072de8..18f0be82fb5 100644
> > > --- a/gcc/cp/constexpr.c
> > > +++ b/gcc/cp/constexpr.c
> > > @@ -2790,9 +2790,7 @@ cxx_eval_call_expression (const constexpr_ctx *ctx,
> > > tree t,
> > >
> > > /* Forget the saved values of the callee's SAVE_EXPRs and
> > > TARGET_EXPRs. */
> > > - unsigned int i;
> > > - tree save_expr;
> > > - FOR_EACH_VEC_ELT (save_exprs, i, save_expr)
> > > + for (tree save_expr : save_exprs)
> > > ctx->global->values.remove (save_expr);
> > >
> > > /* Remove the parms/result from the values map. Is it worth
> > > @@ -5466,9 +5464,7 @@ cxx_eval_store_expression (const constexpr_ctx
> > > *ctx, tree t,
> > > semantics are not applied on an object under construction.
> > > They come into effect when the constructor for the most
> > > derived object ends." */
> > > - tree elt;
> > > - unsigned int i;
> > > - FOR_EACH_VEC_ELT (*ctors, i, elt)
> > > + for (tree elt : *ctors)
> > > if (same_type_ignoring_top_level_qualifiers_p
> > > (TREE_TYPE (const_object_being_modified), TREE_TYPE
> > > (elt)))
> > > {
> > > @@ -5576,12 +5572,10 @@ cxx_eval_store_expression (const constexpr_ctx
> > > *ctx, tree t,
> > >
> > > /* Update TREE_CONSTANT and TREE_SIDE_EFFECTS on enclosing
> > > CONSTRUCTORs, if any. */
> > > - tree elt;
> > > - unsigned i;
> > > bool c = TREE_CONSTANT (init);
> > > bool s = TREE_SIDE_EFFECTS (init);
> > > if (!c || s || activated_union_member_p)
> > > - FOR_EACH_VEC_ELT (*ctors, i, elt)
> > > + for (tree elt : *ctors)
> > > {
> > > if (!c)
> > > TREE_CONSTANT (elt) = false;
> > > @@ -5899,9 +5893,7 @@ cxx_eval_loop_expr (const constexpr_ctx *ctx, tree
> > > t,
> > > }
> > >
> > > /* Forget saved values of SAVE_EXPRs and TARGET_EXPRs. */
> > > - unsigned int i;
> > > - tree save_expr;
> > > - FOR_EACH_VEC_ELT (save_exprs, i, save_expr)
> > > + for (tree save_expr : save_exprs)
> > > ctx->global->values.remove (save_expr);
> > > save_exprs.truncate (0);
> > >
> > > @@ -5923,9 +5915,7 @@ cxx_eval_loop_expr (const constexpr_ctx *ctx, tree
> > > t,
> > > && !*non_constant_p);
> > >
> > > /* Forget saved values of SAVE_EXPRs and TARGET_EXPRs. */
> > > - unsigned int i;
> > > - tree save_expr;
> > > - FOR_EACH_VEC_ELT (save_exprs, i, save_expr)
> > > + for (tree save_expr : save_exprs)
> > > ctx->global->values.remove (save_expr);
> > >
> > > return NULL_TREE;
> > > @@ -7290,7 +7280,6 @@ cxx_eval_outermost_constant_expr (tree t, bool
> > > allow_non_constant,
> > > {
> > > tree heap_var = cp_walk_tree_without_duplicates (&r,
> > > find_heap_var_refs,
> > > NULL);
> > > - unsigned int i;
> > > if (heap_var)
> > > {
> > > if (!allow_non_constant && !non_constant_p)
> > > @@ -7300,7 +7289,7 @@ cxx_eval_outermost_constant_expr (tree t, bool
> > > allow_non_constant,
> > > r = t;
> > > non_constant_p = true;
> > > }
> > > - FOR_EACH_VEC_ELT (global_ctx.heap_vars, i, heap_var)
> > > + for (tree heap_var : global_ctx.heap_vars)
> > > {
> > > if (DECL_NAME (heap_var) != heap_deleted_identifier)
> > > {
> > > diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
> > > index a3687dbb0dd..de75bff93dc 100644
> > > --- a/gcc/cp/decl.c
> > > +++ b/gcc/cp/decl.c
> > > @@ -828,9 +828,7 @@ wrapup_namespace_globals ()
> > > {
> > > if (vec<tree, va_gc> *statics = static_decls)
> > > {
> > > - tree decl;
> > > - unsigned int i;
> > > - FOR_EACH_VEC_ELT (*statics, i, decl)
> > > + for (tree decl : *statics)
> > > {
> > > if (warn_unused_function
> > > && TREE_CODE (decl) == FUNCTION_DECL
> > > @@ -8237,8 +8235,7 @@ cp_finish_decl (tree decl, tree init, bool
> > > init_const_expr_p,
> > > reference, insert it in the statement-tree now. */
> > > if (cleanups)
> > > {
> > > - unsigned i; tree t;
> > > - FOR_EACH_VEC_ELT (*cleanups, i, t)
> > > + for (tree t : *cleanups)
> > > push_cleanup (decl, t, false);
> > > release_tree_vector (cleanups);
> > > }
> > > @@ -16390,11 +16387,9 @@ cxx_simulate_enum_decl (location_t loc, const
> > > char *name,
> > > SET_OPAQUE_ENUM_P (enumtype, false);
> > > DECL_SOURCE_LOCATION (TYPE_NAME (enumtype)) = loc;
> > >
> > > - string_int_pair *value;
> > > - unsigned int i;
> > > - FOR_EACH_VEC_ELT (values, i, value)
> > > - build_enumerator (get_identifier (value->first),
> > > - build_int_cst (integer_type_node, value->second),
> > > + for (const string_int_pair &value : values)
> > > + build_enumerator (get_identifier (value.first),
> > > + build_int_cst (integer_type_node, value.second),
> > > enumtype, NULL_TREE, loc);
> > >
> > > finish_enum_value_list (enumtype);
> > > diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
> > > index 24f248af11c..a41fc51e0ab 100644
> > > --- a/gcc/cp/parser.c
> > > +++ b/gcc/cp/parser.c
> > > @@ -7299,8 +7299,6 @@ cp_parser_postfix_expression (cp_parser *parser,
> > > bool address_p, bool cast_p,
> > > case RID_BUILTIN_LAUNDER:
> > > {
> > > vec<tree, va_gc> *vec;
> > > - unsigned int i;
> > > - tree p;
> > >
> > > cp_lexer_consume_token (parser->lexer);
> > > vec = cp_parser_parenthesized_expression_list (parser, non_attr,
> > > @@ -7312,7 +7310,7 @@ cp_parser_postfix_expression (cp_parser *parser,
> > > bool address_p, bool cast_p,
> > > break;
> > > }
> > >
> > > - FOR_EACH_VEC_ELT (*vec, i, p)
> > > + for (tree p : *vec)
> > > mark_exp_read (p);
> > >
> > > switch (keyword)
> > > diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
> > > index 88eb3f9c455..cd1401238a5 100644
> > > --- a/gcc/dwarf2out.c
> > > +++ b/gcc/dwarf2out.c
> > > @@ -784,7 +784,7 @@ output_call_frame_info (int for_eh)
> > > {
> > > bool any_eh_needed = false;
> > >
> > > - FOR_EACH_VEC_ELT (*fde_vec, i, fde)
> > > + for (dw_fde_ref fde : fde_vec)
> > > {
> > > if (fde->uses_eh_lsda)
> > > any_eh_needed = any_lsda_needed = true;
> > > diff --git a/gcc/gcc.c b/gcc/gcc.c
> > > index 4c1a659d5e8..af286400a4a 100644
> > > --- a/gcc/gcc.c
> > > +++ b/gcc/gcc.c
> > > @@ -5838,10 +5838,7 @@ compile_input_file_p (struct infile *infile)
> > > static void
> > > do_specs_vec (vec<char_p> vec)
> > > {
> > > - unsigned ix;
> > > - char *opt;
> > > -
> > > - FOR_EACH_VEC_ELT (vec, ix, opt)
> > > + for (char *opt : vec)
> > > {
> > > do_spec_1 (opt, 1, NULL);
> > > /* Make each accumulated option a separate argument. */
> > > @@ -6436,8 +6433,6 @@ do_spec_1 (const char *spec, int inswitch, const
> > > char *soft_matched_part)
> > > {
> > > const char *p1 = p;
> > > char *string;
> > > - char *opt;
> > > - unsigned ix;
> > >
> > > /* Skip past the option value and make a copy. */
> > > if (*p != '{')
> > > @@ -6448,7 +6443,7 @@ do_spec_1 (const char *spec, int inswitch, const
> > > char *soft_matched_part)
> > > string = save_string (p1 + 1, p - p1 - 2);
> > >
> > > /* See if we already recorded this option. */
> > > - FOR_EACH_VEC_ELT (linker_options, ix, opt)
> > > + for (const char *opt : linker_options)
> > > if (! strcmp (string, opt))
> > > {
> > > free (string);
> > > @@ -8316,9 +8311,7 @@ driver::set_up_specs () const
> > > && do_spec_2 (startfile_prefix_spec, NULL) == 0
> > > && do_spec_1 (" ", 0, NULL) == 0)
> > > {
> > > - const char *arg;
> > > - int ndx;
> > > - FOR_EACH_VEC_ELT (argbuf, ndx, arg)
> > > + for (const char *arg : argbuf)
> > > add_sysrooted_prefix (&startfile_prefixes, arg, "BINUTILS",
> > > PREFIX_PRIORITY_LAST, 0, 1);
> > > }
> > > diff --git a/gcc/gimple-loop-jam.c b/gcc/gimple-loop-jam.c
> > > index 69dbaeb6cb9..4842f0dff80 100644
> > > --- a/gcc/gimple-loop-jam.c
> > > +++ b/gcc/gimple-loop-jam.c
> > > @@ -365,11 +365,9 @@ static bool
> > > any_access_function_variant_p (const struct data_reference *a,
> > > const class loop *loop_nest)
> > > {
> > > - unsigned int i;
> > > vec<tree> fns = DR_ACCESS_FNS (a);
> > > - tree t;
> > >
> > > - FOR_EACH_VEC_ELT (fns, i, t)
> > > + for (tree t : fns)
> > > if (!evolution_function_is_invariant_p (t, loop_nest->num))
> > > return true;
> > >
> > > diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c
> > > index 6ee44cbada2..6112cccf734 100644
> > > --- a/gcc/ifcvt.c
> > > +++ b/gcc/ifcvt.c
> > > @@ -3889,11 +3889,9 @@ cond_move_process_if_block (struct noce_if_info
> > > *if_info)
> > > rtx_insn *jump = if_info->jump;
> > > rtx cond = if_info->cond;
> > > rtx_insn *seq, *loc_insn;
> > > - rtx reg;
> > > int c;
> > > vec<rtx> then_regs = vNULL;
> > > vec<rtx> else_regs = vNULL;
> > > - unsigned int i;
> > > int success_p = FALSE;
> > > int limit = param_max_rtl_if_conversion_insns;
> > >
> > > @@ -3915,7 +3913,7 @@ cond_move_process_if_block (struct noce_if_info
> > > *if_info)
> > > source register does not change after the assignment. Also count
> > > the number of registers set in only one of the blocks. */
> > > c = 0;
> > > - FOR_EACH_VEC_ELT (then_regs, i, reg)
> > > + for (rtx reg : then_regs)
> > > {
> > > rtx *then_slot = then_vals.get (reg);
> > > rtx *else_slot = else_vals.get (reg);
> > > @@ -3934,7 +3932,7 @@ cond_move_process_if_block (struct noce_if_info
> > > *if_info)
> > > }
> > >
> > > /* Finish off c for MAX_CONDITIONAL_EXECUTE. */
> > > - FOR_EACH_VEC_ELT (else_regs, i, reg)
> > > + for (rtx reg : else_regs)
> > > {
> > > gcc_checking_assert (else_vals.get (reg));
> > > if (!then_vals.get (reg))
> > > diff --git a/gcc/ipa-modref.c b/gcc/ipa-modref.c
> > > index d5a8332fb55..551b60b8931 100644
> > > --- a/gcc/ipa-modref.c
> > > +++ b/gcc/ipa-modref.c
> > > @@ -1406,20 +1406,17 @@ bool
> > > modref_lattice::add_escape_point (gcall *call, int arg, int min_flags,
> > > bool direct)
> > > {
> > > - escape_point *ep;
> > > - unsigned int i;
> > > -
> > > /* If we already determined flags to be bad enough,
> > > * we do not need to record. */
> > > if ((flags & min_flags) == flags)
> > > return false;
> > >
> > > - FOR_EACH_VEC_ELT (escape_points, i, ep)
> > > - if (ep->call == call && ep->arg == arg && ep->direct == direct)
> > > + for (escape_point &ep : escape_points)
> > > + if (ep.call == call && ep.arg == arg && ep.direct == direct)
> > > {
> > > - if ((ep->min_flags & min_flags) == min_flags)
> > > + if ((ep.min_flags & min_flags) == min_flags)
> > > return false;
> > > - ep->min_flags &= min_flags;
> > > + ep.min_flags &= min_flags;
> > > return true;
> > > }
> > > /* Give up if max escape points is met. */
> > > @@ -1881,18 +1878,15 @@ analyze_parms (modref_summary *summary,
> > > modref_summary_lto *summary_lto,
> > > }
> > > if (lattice[SSA_NAME_VERSION (name)].escape_points.length ())
> > > {
> > > - escape_point *ep;
> > > - unsigned int ip;
> > > cgraph_node *node = cgraph_node::get
> > > (current_function_decl);
> > >
> > > gcc_checking_assert (ipa);
> > > - FOR_EACH_VEC_ELT
> > > - (lattice[SSA_NAME_VERSION (name)].escape_points, ip, ep)
> > > - if ((ep->min_flags & flags) != flags)
> > > + for (const escape_point &ep : lattice[SSA_NAME_VERSION
> > > (name)].escape_points)
> > > + if ((ep.min_flags & flags) != flags)
> > > {
> > > - cgraph_edge *e = node->get_edge (ep->call);
> > > - struct escape_entry ee = {parm_index, ep->arg,
> > > - ep->min_flags, ep->direct};
> > > + cgraph_edge *e = node->get_edge (ep.call);
> > > + struct escape_entry ee = {parm_index, ep.arg,
> > > + ep.min_flags, ep.direct};
> > >
> > > escape_summaries->get_create (e)->esc.safe_push (ee);
> > > }
> > > @@ -2438,14 +2432,12 @@ modref_write_escape_summary (struct bitpack_d
> > > *bp, escape_summary *esum)
> > > return;
> > > }
> > > bp_pack_var_len_unsigned (bp, esum->esc.length ());
> > > - unsigned int i;
> > > - escape_entry *ee;
> > > - FOR_EACH_VEC_ELT (esum->esc, i, ee)
> > > + for (const escape_entry &ee : esum->esc)
> > > {
> > > - bp_pack_var_len_unsigned (bp, ee->parm_index);
> > > - bp_pack_var_len_unsigned (bp, ee->arg);
> > > - bp_pack_var_len_unsigned (bp, ee->min_flags);
> > > - bp_pack_value (bp, ee->direct, 1);
> > > + bp_pack_var_len_unsigned (bp, ee.parm_index);
> > > + bp_pack_var_len_unsigned (bp, ee.arg);
> > > + bp_pack_var_len_unsigned (bp, ee.min_flags);
> > > + bp_pack_value (bp, ee.direct, 1);
> > > }
> > > }
> > >
> > > @@ -3001,19 +2993,15 @@ update_escape_summary_1 (cgraph_edge *e,
> > > auto_vec <escape_entry> old = sum->esc.copy ();
> > > sum->esc.release ();
> > >
> > > - unsigned int i;
> > > - escape_entry *ee;
> > > - FOR_EACH_VEC_ELT (old, i, ee)
> > > + for (const escape_entry &ee : old)
> > > {
> > > - unsigned int j;
> > > - struct escape_map *em;
> > > - if (ee->parm_index >= map.length ())
> > > + if (ee.parm_index >= map.length ())
> > > continue;
> > > - FOR_EACH_VEC_ELT (map[ee->parm_index], j, em)
> > > + for (const escape_map &em : map[ee.parm_index])
> > > {
> > > - struct escape_entry entry = {em->parm_index, ee->arg,
> > > - ee->min_flags,
> > > - ee->direct & em->direct};
> > > + struct escape_entry entry = {em.parm_index, ee.arg,
> > > + ee.min_flags,
> > > + ee.direct & em.direct};
> > > sum->esc.safe_push (entry);
> > > }
> > > }
> > > diff --git a/gcc/ipa-prop.h b/gcc/ipa-prop.h
> > > index 3d28a6e8640..03a07cc6a09 100644
> > > --- a/gcc/ipa-prop.h
> > > +++ b/gcc/ipa-prop.h
> > > @@ -251,13 +251,9 @@ ipa_copy_agg_values (const vec<ipa_agg_value_set>
> > > &aggs)
> > >
> > > if (!aggs.is_empty ())
> > > {
> > > - ipa_agg_value_set *agg;
> > > - int i;
> > > -
> > > aggs_copy.reserve_exact (aggs.length ());
> > > -
> > > - FOR_EACH_VEC_ELT (aggs, i, agg)
> > > - aggs_copy.quick_push (agg->copy ());
> > > + for (const ipa_agg_value_set &agg : aggs)
> > > + aggs_copy.quick_push (agg.copy ());
> > > }
> > >
> > > return aggs_copy;
> > > @@ -272,11 +268,8 @@ static inline void
> > > ipa_release_agg_values (vec<ipa_agg_value_set> &aggs,
> > > bool release_vector = true)
> > > {
> > > - ipa_agg_value_set *agg;
> > > - int i;
> > > -
> > > - FOR_EACH_VEC_ELT (aggs, i, agg)
> > > - agg->release ();
> > > + for (ipa_agg_value_set &agg : aggs)
> > > + agg.release ();
> > > if (release_vector)
> > > aggs.release ();
> > > }
> > > diff --git a/gcc/lower-subreg.c b/gcc/lower-subreg.c
> > > index 34eb8b193ac..21078268ba0 100644
> > > --- a/gcc/lower-subreg.c
> > > +++ b/gcc/lower-subreg.c
> > > @@ -1731,14 +1731,9 @@ decompose_multiword_subregs (bool decompose_copies)
> > > }
> > > }
> > >
> > > - {
> > > - unsigned int i;
> > > - bitmap b;
> > > -
> > > - FOR_EACH_VEC_ELT (reg_copy_graph, i, b)
> > > - if (b)
> > > - BITMAP_FREE (b);
> > > - }
> > > + for (bitmap b : reg_copy_graph)
> > > + if (b)
> > > + BITMAP_FREE (b);
> > >
> > > reg_copy_graph.release ();
> > >
> > > diff --git a/gcc/lto-streamer-out.c b/gcc/lto-streamer-out.c
> > > index a26d4885800..7dc3b87132e 100644
> > > --- a/gcc/lto-streamer-out.c
> > > +++ b/gcc/lto-streamer-out.c
> > > @@ -1127,13 +1127,10 @@ DFS::DFS_write_tree_body (struct output_block *ob,
> > >
> > > if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
> > > {
> > > - unsigned i;
> > > - tree t;
> > > -
> > > /* Note that the number of BINFO slots has already been emitted in
> > > EXPR's header (see streamer_write_tree_header) because this
> > > length
> > > is needed to build the empty BINFO node on the reader side. */
> > > - FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (expr), i, t)
> > > + for (tree t : *BINFO_BASE_BINFOS (expr))
> > > DFS_follow_tree_edge (t);
> > > DFS_follow_tree_edge (BINFO_OFFSET (expr));
> > > DFS_follow_tree_edge (BINFO_VTABLE (expr));
> > > @@ -1510,9 +1507,7 @@ hash_tree (struct streamer_tree_cache_d *cache,
> > > hash_map<tree, hashval_t> *map,
> > >
> > > if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
> > > {
> > > - unsigned i;
> > > - tree b;
> > > - FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (t), i, b)
> > > + for (tree b : *BINFO_BASE_BINFOS (t))
> > > visit (b);
> > > visit (BINFO_OFFSET (t));
> > > visit (BINFO_VTABLE (t));
> > > @@ -2644,8 +2639,7 @@ prune_offload_funcs (void)
> > > VEC_ORDERED_REMOVE_IF (*offload_funcs, ix, ix2, elem_ptr,
> > > cgraph_node::get (*elem_ptr) == NULL);
> > >
> > > - tree fn_decl;
> > > - FOR_EACH_VEC_ELT (*offload_funcs, ix, fn_decl)
> > > + for (tree fn_decl : *offload_funcs)
> > > DECL_PRESERVE_P (fn_decl) = 1;
> > > }
> > >
> > > diff --git a/gcc/sel-sched-dump.c b/gcc/sel-sched-dump.c
> > > index 3d26483696b..993a16a3f0c 100644
> > > --- a/gcc/sel-sched-dump.c
> > > +++ b/gcc/sel-sched-dump.c
> > > @@ -528,10 +528,7 @@ dump_flist (flist_t l)
> > > void
> > > dump_insn_vector (rtx_vec_t succs)
> > > {
> > > - int i;
> > > - rtx_insn *succ;
> > > -
> > > - FOR_EACH_VEC_ELT (succs, i, succ)
> > > + for (rtx_insn *succ : succs)
> > > if (succ)
> > > dump_insn (succ);
> > > else
> > > diff --git a/gcc/timevar.c b/gcc/timevar.c
> > > index 8fc122ba9fe..5f54215f108 100644
> > > --- a/gcc/timevar.c
> > > +++ b/gcc/timevar.c
> > > @@ -198,10 +198,8 @@ timer::named_items::pop ()
> > > void
> > > timer::named_items::print (FILE *fp, const timevar_time_def *total)
> > > {
> > > - unsigned int i;
> > > - const char *item_name;
> > > fprintf (fp, "Client items:\n");
> > > - FOR_EACH_VEC_ELT (m_names, i, item_name)
> > > + for (const char *item_name : m_names)
> > > {
> > > timer::timevar_def *def = m_hash_map.get (item_name);
> > > gcc_assert (def);
> > > diff --git a/gcc/tree-cfgcleanup.c b/gcc/tree-cfgcleanup.c
> > > index b736e17339b..a016ee47a02 100644
> > > --- a/gcc/tree-cfgcleanup.c
> > > +++ b/gcc/tree-cfgcleanup.c
> > > @@ -950,9 +950,7 @@ cleanup_control_flow_pre ()
> > > /* If we've marked .ABNORMAL_DISPATCHER basic block(s) as visited
> > > above, but haven't marked any of their successors as visited,
> > > unmark them now, so that they can be removed as useless. */
> > > - basic_block dispatcher_bb;
> > > - unsigned int k;
> > > - FOR_EACH_VEC_ELT (abnormal_dispatchers, k, dispatcher_bb)
> > > + for (basic_block dispatcher_bb : abnormal_dispatchers)
> > > {
> > > edge e;
> > > edge_iterator ei;
> > > @@ -1015,9 +1013,7 @@ cleanup_tree_cfg_noloop (unsigned ssa_update_flags)
> > > if (!dom_info_available_p (CDI_DOMINATORS))
> > > mark_dfs_back_edges ();
> > >
> > > - loop_p loop;
> > > - unsigned i;
> > > - FOR_EACH_VEC_ELT (*get_loops (cfun), i, loop)
> > > + for (loop_p loop : *get_loops (cfun))
> > > if (loop && loop->header)
> > > {
> > > basic_block bb = loop->header;
> > > diff --git a/gcc/tree-data-ref.c b/gcc/tree-data-ref.c
> > > index b1f64684840..ba939251639 100644
> > > --- a/gcc/tree-data-ref.c
> > > +++ b/gcc/tree-data-ref.c
> > > @@ -170,10 +170,7 @@ ref_contains_union_access_p (tree ref)
> > > static void
> > > dump_data_references (FILE *file, vec<data_reference_p> datarefs)
> > > {
> > > - unsigned int i;
> > > - struct data_reference *dr;
> > > -
> > > - FOR_EACH_VEC_ELT (datarefs, i, dr)
> > > + for (data_reference *dr : datarefs)
> > > dump_data_reference (file, dr);
> > > }
> > >
> > > @@ -378,10 +375,7 @@ DEBUG_FUNCTION void
> > > print_dir_vectors (FILE *outf, vec<lambda_vector> dir_vects,
> > > int length)
> > > {
> > > - unsigned j;
> > > - lambda_vector v;
> > > -
> > > - FOR_EACH_VEC_ELT (dir_vects, j, v)
> > > + for (lambda_vector v : dir_vects)
> > > print_direction_vector (outf, v, length);
> > > }
> > >
> > > @@ -403,10 +397,7 @@ DEBUG_FUNCTION void
> > > print_dist_vectors (FILE *outf, vec<lambda_vector> dist_vects,
> > > int length)
> > > {
> > > - unsigned j;
> > > - lambda_vector v;
> > > -
> > > - FOR_EACH_VEC_ELT (dist_vects, j, v)
> > > + for (lambda_vector v : dist_vects)
> > > print_lambda_vector (outf, v, length);
> > > }
> > >
> > > @@ -450,10 +441,8 @@ dump_data_dependence_relation (FILE *outf,
> > > else if (DDR_ARE_DEPENDENT (ddr) == NULL_TREE)
> > > {
> > > unsigned int i;
> > > - class loop *loopi;
> > >
> > > - subscript *sub;
> > > - FOR_EACH_VEC_ELT (DDR_SUBSCRIPTS (ddr), i, sub)
> > > + for (subscript *sub : DDR_SUBSCRIPTS (ddr))
> > > {
> > > fprintf (outf, " access_fn_A: ");
> > > print_generic_stmt (outf, SUB_ACCESS_FN (sub, 0));
> > > @@ -463,7 +452,7 @@ dump_data_dependence_relation (FILE *outf,
> > > }
> > >
> > > fprintf (outf, " loop nest: (");
> > > - FOR_EACH_VEC_ELT (DDR_LOOP_NEST (ddr), i, loopi)
> > > + for (class loop *loopi : DDR_LOOP_NEST (ddr))
> > > fprintf (outf, "%d ", loopi->num);
> > > fprintf (outf, ")\n");
> > >
> > > @@ -499,10 +488,7 @@ DEBUG_FUNCTION void
> > > dump_data_dependence_relations (FILE *file,
> > > vec<ddr_p> ddrs)
> > > {
> > > - unsigned int i;
> > > - struct data_dependence_relation *ddr;
> > > -
> > > - FOR_EACH_VEC_ELT (ddrs, i, ddr)
> > > + for (data_dependence_relation *ddr : ddrs)
> > > dump_data_dependence_relation (file, ddr);
> > > }
> > >
> > > @@ -538,21 +524,17 @@ debug_data_dependence_relations (vec<ddr_p> ddrs)
> > > DEBUG_FUNCTION void
> > > dump_dist_dir_vectors (FILE *file, vec<ddr_p> ddrs)
> > > {
> > > - unsigned int i, j;
> > > - struct data_dependence_relation *ddr;
> > > - lambda_vector v;
> > > -
> > > - FOR_EACH_VEC_ELT (ddrs, i, ddr)
> > > + for (data_dependence_relation *ddr : ddrs)
> > > if (DDR_ARE_DEPENDENT (ddr) == NULL_TREE && DDR_AFFINE_P (ddr))
> > > {
> > > - FOR_EACH_VEC_ELT (DDR_DIST_VECTS (ddr), j, v)
> > > + for (lambda_vector v : DDR_DIST_VECTS (ddr))
> > > {
> > > fprintf (file, "DISTANCE_V (");
> > > print_lambda_vector (file, v, DDR_NB_LOOPS (ddr));
> > > fprintf (file, ")\n");
> > > }
> > >
> > > - FOR_EACH_VEC_ELT (DDR_DIR_VECTS (ddr), j, v)
> > > + for (lambda_vector v : DDR_DIR_VECTS (ddr))
> > > {
> > > fprintf (file, "DIRECTION_V (");
> > > print_direction_vector (file, v, DDR_NB_LOOPS (ddr));
> > > @@ -568,10 +550,7 @@ dump_dist_dir_vectors (FILE *file, vec<ddr_p> ddrs)
> > > DEBUG_FUNCTION void
> > > dump_ddrs (FILE *file, vec<ddr_p> ddrs)
> > > {
> > > - unsigned int i;
> > > - struct data_dependence_relation *ddr;
> > > -
> > > - FOR_EACH_VEC_ELT (ddrs, i, ddr)
> > > + for (data_dependence_relation *ddr : ddrs)
> > > dump_data_dependence_relation (file, ddr);
> > >
> > > fprintf (file, "\n\n");
> > > @@ -1808,10 +1787,10 @@ prune_runtime_alias_test_list
> > > (vec<dr_with_seg_len_pair_t> *alias_pairs,
> > > cases. */
> > > unsigned int i;
> > > dr_with_seg_len_pair_t *alias_pair;
> > > - FOR_EACH_VEC_ELT (*alias_pairs, i, alias_pair)
> > > + for (dr_with_seg_len_pair_t &alias_pair : *alias_pairs)
> > > {
> > > - data_reference_p dr_a = alias_pair->first.dr;
> > > - data_reference_p dr_b = alias_pair->second.dr;
> > > + data_reference_p dr_a = alias_pair.first.dr;
> > > + data_reference_p dr_b = alias_pair.second.dr;
> > > int comp_res = data_ref_compare_tree (DR_BASE_ADDRESS (dr_a),
> > > DR_BASE_ADDRESS (dr_b));
> > > if (comp_res == 0)
> > > @@ -1820,11 +1799,11 @@ prune_runtime_alias_test_list
> > > (vec<dr_with_seg_len_pair_t> *alias_pairs,
> > > comp_res = data_ref_compare_tree (DR_INIT (dr_a), DR_INIT (dr_b));
> > > if (comp_res > 0)
> > > {
> > > - std::swap (alias_pair->first, alias_pair->second);
> > > - alias_pair->flags |= DR_ALIAS_SWAPPED;
> > > + std::swap (alias_pair.first, alias_pair.second);
> > > + alias_pair.flags |= DR_ALIAS_SWAPPED;
> > > }
> > > else
> > > - alias_pair->flags |= DR_ALIAS_UNSWAPPED;
> > > + alias_pair.flags |= DR_ALIAS_UNSWAPPED;
> > > }
> > >
> > > /* Sort the collected data ref pairs so that we can scan them once to
> > > @@ -2668,19 +2647,17 @@ create_runtime_alias_checks (class loop *loop,
> > > tree part_cond_expr;
> > >
> > > fold_defer_overflow_warnings ();
> > > - dr_with_seg_len_pair_t *alias_pair;
> > > - unsigned int i;
> > > - FOR_EACH_VEC_ELT (*alias_pairs, i, alias_pair)
> > > + for (const dr_with_seg_len_pair_t &alias_pair : alias_pairs)
> > > {
> > > - gcc_assert (alias_pair->flags);
> > > + gcc_assert (alias_pair.flags);
> > > if (dump_enabled_p ())
> > > dump_printf (MSG_NOTE,
> > > "create runtime check for data references %T and
> > > %T\n",
> > > - DR_REF (alias_pair->first.dr),
> > > - DR_REF (alias_pair->second.dr));
> > > + DR_REF (alias_pair.first.dr),
> > > + DR_REF (alias_pair.second.dr));
> > >
> > > /* Create condition expression for each pair data references. */
> > > - create_intersect_range_checks (loop, &part_cond_expr, *alias_pair);
> > > + create_intersect_range_checks (loop, &part_cond_expr, alias_pair);
> > > if (*cond_expr)
> > > *cond_expr = fold_build2 (TRUTH_AND_EXPR, boolean_type_node,
> > > *cond_expr, part_cond_expr);
> > > @@ -3436,10 +3413,7 @@ free_conflict_function (conflict_function *f)
> > > static void
> > > free_subscripts (vec<subscript_p> subscripts)
> > > {
> > > - unsigned i;
> > > - subscript_p s;
> > > -
> > > - FOR_EACH_VEC_ELT (subscripts, i, s)
> > > + for (subscript_p s : subscripts)
> > > {
> > > free_conflict_function (s->conflicting_iterations_in_a);
> > > free_conflict_function (s->conflicting_iterations_in_b);
> > > @@ -4980,10 +4954,7 @@ analyze_overlapping_iterations (tree chrec_a,
> > > static void
> > > save_dist_v (struct data_dependence_relation *ddr, lambda_vector dist_v)
> > > {
> > > - unsigned i;
> > > - lambda_vector v;
> > > -
> > > - FOR_EACH_VEC_ELT (DDR_DIST_VECTS (ddr), i, v)
> > > + for (lambda_vector v : DDR_DIST_VECTS (ddr))
> > > if (lambda_vector_equal (v, dist_v, DDR_NB_LOOPS (ddr)))
> > > return;
> > >
> > > @@ -4995,10 +4966,7 @@ save_dist_v (struct data_dependence_relation *ddr,
> > > lambda_vector dist_v)
> > > static void
> > > save_dir_v (struct data_dependence_relation *ddr, lambda_vector dir_v)
> > > {
> > > - unsigned i;
> > > - lambda_vector v;
> > > -
> > > - FOR_EACH_VEC_ELT (DDR_DIR_VECTS (ddr), i, v)
> > > + for (lambda_vector v : DDR_DIR_VECTS (ddr))
> > > if (lambda_vector_equal (v, dir_v, DDR_NB_LOOPS (ddr)))
> > > return;
> > >
> > > @@ -5133,10 +5101,7 @@ static bool
> > > invariant_access_functions (const struct data_dependence_relation *ddr,
> > > int lnum)
> > > {
> > > - unsigned i;
> > > - subscript *sub;
> > > -
> > > - FOR_EACH_VEC_ELT (DDR_SUBSCRIPTS (ddr), i, sub)
> > > + for (subscript *sub : DDR_SUBSCRIPTS (ddr))
> > > if (!evolution_function_is_invariant_p (SUB_ACCESS_FN (sub, 0), lnum)
> > > || !evolution_function_is_invariant_p (SUB_ACCESS_FN (sub, 1),
> > > lnum))
> > > return false;
> > > @@ -5305,10 +5270,7 @@ add_distance_for_zero_overlaps (struct
> > > data_dependence_relation *ddr)
> > > static inline bool
> > > same_access_functions (const struct data_dependence_relation *ddr)
> > > {
> > > - unsigned i;
> > > - subscript *sub;
> > > -
> > > - FOR_EACH_VEC_ELT (DDR_SUBSCRIPTS (ddr), i, sub)
> > > + for (subscript *sub : DDR_SUBSCRIPTS (ddr))
> > > if (!eq_evolutions_p (SUB_ACCESS_FN (sub, 0),
> > > SUB_ACCESS_FN (sub, 1)))
> > > return false;
> > > @@ -5585,11 +5547,8 @@ static bool
> > > access_functions_are_affine_or_constant_p (const struct data_reference
> > > *a,
> > > const class loop *loop_nest)
> > > {
> > > - unsigned int i;
> > > vec<tree> fns = DR_ACCESS_FNS (a);
> > > - tree t;
> > > -
> > > - FOR_EACH_VEC_ELT (fns, i, t)
> > > + for (tree t : fns)
> > > if (!evolution_function_is_invariant_p (t, loop_nest->num)
> > > && !evolution_function_is_affine_multivariate_p (t,
> > > loop_nest->num))
> > > return false;
> > > @@ -5700,7 +5659,7 @@ compute_all_dependences (vec<data_reference_p>
> > > datarefs,
> > > }
> > >
> > > if (compute_self_and_rr)
> > > - FOR_EACH_VEC_ELT (datarefs, i, a)
> > > + for (data_reference *a : datarefs)
> > > {
> > > ddr = initialize_data_dependence_relation (a, a, loop_nest);
> > > dependence_relations->safe_push (ddr);
> > > @@ -5896,20 +5855,18 @@ opt_result
> > > find_data_references_in_stmt (class loop *nest, gimple *stmt,
> > > vec<data_reference_p> *datarefs)
> > > {
> > > - unsigned i;
> > > auto_vec<data_ref_loc, 2> references;
> > > - data_ref_loc *ref;
> > > data_reference_p dr;
> > >
> > > if (get_references_in_stmt (stmt, &references))
> > > return opt_result::failure_at (stmt, "statement clobbers memory: %G",
> > > stmt);
> > >
> > > - FOR_EACH_VEC_ELT (references, i, ref)
> > > + for (const data_ref_loc &ref : references)
> > > {
> > > dr = create_data_ref (nest ? loop_preheader_edge (nest) : NULL,
> > > - loop_containing_stmt (stmt), ref->ref,
> > > - stmt, ref->is_read,
> > > ref->is_conditional_in_stmt);
> > > + loop_containing_stmt (stmt), ref.ref,
> > > + stmt, ref.is_read,
> > > ref.is_conditional_in_stmt);
> > > gcc_assert (dr != NULL);
> > > datarefs->safe_push (dr);
> > > }
> > > @@ -5927,19 +5884,17 @@ bool
> > > graphite_find_data_references_in_stmt (edge nest, loop_p loop, gimple
> > > *stmt,
> > > vec<data_reference_p> *datarefs)
> > > {
> > > - unsigned i;
> > > auto_vec<data_ref_loc, 2> references;
> > > - data_ref_loc *ref;
> > > bool ret = true;
> > > data_reference_p dr;
> > >
> > > if (get_references_in_stmt (stmt, &references))
> > > return false;
> > >
> > > - FOR_EACH_VEC_ELT (references, i, ref)
> > > + for (const data_ref_loc &ref : references)
> > > {
> > > - dr = create_data_ref (nest, loop, ref->ref, stmt, ref->is_read,
> > > - ref->is_conditional_in_stmt);
> > > + dr = create_data_ref (nest, loop, ref.ref, stmt, ref.is_read,
> > > + ref.is_conditional_in_stmt);
> > > gcc_assert (dr != NULL);
> > > datarefs->safe_push (dr);
> > > }
> > > @@ -6247,10 +6202,7 @@ free_dependence_relation (struct
> > > data_dependence_relation *ddr)
> > > void
> > > free_dependence_relations (vec<ddr_p> dependence_relations)
> > > {
> > > - unsigned int i;
> > > - struct data_dependence_relation *ddr;
> > > -
> > > - FOR_EACH_VEC_ELT (dependence_relations, i, ddr)
> > > + for (data_dependence_relation *ddr : dependence_relations)
> > > if (ddr)
> > > free_dependence_relation (ddr);
> > >
> > > @@ -6262,10 +6214,7 @@ free_dependence_relations (vec<ddr_p>
> > > dependence_relations)
> > > void
> > > free_data_refs (vec<data_reference_p> datarefs)
> > > {
> > > - unsigned int i;
> > > - struct data_reference *dr;
> > > -
> > > - FOR_EACH_VEC_ELT (datarefs, i, dr)
> > > + for (data_reference *dr : datarefs)
> > > free_data_ref (dr);
> > > datarefs.release ();
> > > }
> > > diff --git a/gcc/tree-into-ssa.c b/gcc/tree-into-ssa.c
> > > index 85adb1ad8c7..8045e34df26 100644
> > > --- a/gcc/tree-into-ssa.c
> > > +++ b/gcc/tree-into-ssa.c
> > > @@ -1638,14 +1638,11 @@ debug_defs_stack (int n)
> > > void
> > > dump_currdefs (FILE *file)
> > > {
> > > - unsigned i;
> > > - tree var;
> > > -
> > > if (symbols_to_rename.is_empty ())
> > > return;
> > >
> > > fprintf (file, "\n\nCurrent reaching definitions\n\n");
> > > - FOR_EACH_VEC_ELT (symbols_to_rename, i, var)
> > > + for (tree var : symbols_to_rename)
> > > {
> > > common_info *info = get_common_info (var);
> > > fprintf (file, "CURRDEF (");
> > > @@ -2069,18 +2066,16 @@ rewrite_update_phi_arguments (basic_block bb)
> > > {
> > > edge e;
> > > edge_iterator ei;
> > > - unsigned i;
> > >
> > > FOR_EACH_EDGE (e, ei, bb->succs)
> > > {
> > > - gphi *phi;
> > > vec<gphi *> phis;
> > >
> > > if (!bitmap_bit_p (blocks_with_phis_to_rewrite, e->dest->index))
> > > continue;
> > >
> > > phis = phis_to_rewrite[e->dest->index];
> > > - FOR_EACH_VEC_ELT (phis, i, phi)
> > > + for (gphi *phi : phis)
> > > {
> > > tree arg, lhs_sym, reaching_def = NULL;
> > > use_operand_p arg_p;
> > > diff --git a/gcc/tree-ssa-phiopt.c b/gcc/tree-ssa-phiopt.c
> > > index 969b868397e..d8233a6cb0e 100644
> > > --- a/gcc/tree-ssa-phiopt.c
> > > +++ b/gcc/tree-ssa-phiopt.c
> > > @@ -3180,8 +3180,7 @@ cond_if_else_store_replacement (basic_block
> > > then_bb, basic_block else_bb,
> > > gimple *then_store, *else_store;
> > > bool found, ok = false, res;
> > > struct data_dependence_relation *ddr;
> > > - data_reference_p then_dr, else_dr;
> > > - int i, j;
> > > + int i;
> > > tree then_lhs, else_lhs;
> > > basic_block blocks[3];
> > >
> > > @@ -3233,7 +3232,7 @@ cond_if_else_store_replacement (basic_block
> > > then_bb, basic_block else_bb,
> > >
> > > /* Find pairs of stores with equal LHS. */
> > > auto_vec<gimple *, 1> then_stores, else_stores;
> > > - FOR_EACH_VEC_ELT (then_datarefs, i, then_dr)
> > > + for (data_reference_p then_dr : then_datarefs)
> > > {
> > > if (DR_IS_READ (then_dr))
> > > continue;
> > > @@ -3244,7 +3243,7 @@ cond_if_else_store_replacement (basic_block
> > > then_bb, basic_block else_bb,
> > > continue;
> > > found = false;
> > >
> > > - FOR_EACH_VEC_ELT (else_datarefs, j, else_dr)
> > > + for (data_reference_p else_dr : else_datarefs)
> > > {
> > > if (DR_IS_READ (else_dr))
> > > continue;
> > > diff --git a/gcc/tree-ssa-propagate.c b/gcc/tree-ssa-propagate.c
> > > index b3dcd43c00d..d93ec90b002 100644
> > > --- a/gcc/tree-ssa-propagate.c
> > > +++ b/gcc/tree-ssa-propagate.c
> > > @@ -1258,8 +1258,6 @@ propagate_tree_value_into_stmt
> > > (gimple_stmt_iterator *gsi, tree val)
> > > unsigned
> > > clean_up_loop_closed_phi (function *fun)
> > > {
> > > - unsigned i;
> > > - edge e;
> > > gphi *phi;
> > > tree rhs;
> > > tree lhs;
> > > @@ -1280,7 +1278,7 @@ clean_up_loop_closed_phi (function *fun)
> > > {
> > > /* Check each exit edege of loop. */
> > > auto_vec<edge> exits = get_loop_exit_edges (loop);
> > > - FOR_EACH_VEC_ELT (exits, i, e)
> > > + for (edge e : exits)
> > > if (single_pred_p (e->dest))
> > > /* Walk over loop-closed PHIs. */
> > > for (gsi = gsi_start_phis (e->dest); !gsi_end_p (gsi);)
> > > diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c
> > > index 7163438e23d..988df87b41c 100644
> > > --- a/gcc/tree-ssa-structalias.c
> > > +++ b/gcc/tree-ssa-structalias.c
> > > @@ -933,11 +933,9 @@ static bool
> > > constraint_set_union (vec<constraint_t> *to,
> > > vec<constraint_t> *from)
> > > {
> > > - int i;
> > > - constraint_t c;
> > > bool any_change = false;
> > >
> > > - FOR_EACH_VEC_ELT (*from, i, c)
> > > + for (constraint_t c : *from)
> > > {
> > > if (constraint_vec_find (*to, *c) == NULL)
> > > {
> > > @@ -1080,14 +1078,12 @@ static bool
> > > merge_node_constraints (constraint_graph_t graph, unsigned int to,
> > > unsigned int from)
> > > {
> > > - unsigned int i;
> > > - constraint_t c;
> > > bool any_change = false;
> > >
> > > gcc_checking_assert (find (from) == to);
> > >
> > > /* Move all complex constraints from src node into to node */
> > > - FOR_EACH_VEC_ELT (graph->complex[from], i, c)
> > > + for (constraint_t c : graph->complex[from])
> > > {
> > > /* In complex constraints for node FROM, we may have either
> > > a = *FROM, and *FROM = a, or an offseted constraint which are
> > > @@ -2580,10 +2576,7 @@ unite_pointer_equivalences (constraint_graph_t
> > > graph)
> > > static void
> > > move_complex_constraints (constraint_graph_t graph)
> > > {
> > > - int i;
> > > - constraint_t c;
> > > -
> > > - FOR_EACH_VEC_ELT (constraints, i, c)
> > > + for (constraint_t c : constraints)
> > > {
> > > if (c)
> > > {
> > > @@ -3458,21 +3451,18 @@ get_constraint_for_component_ref (tree t,
> > > vec<ce_s> *results,
> > > static void
> > > do_deref (vec<ce_s> *constraints)
> > > {
> > > - struct constraint_expr *c;
> > > - unsigned int i = 0;
> > > -
> > > - FOR_EACH_VEC_ELT (*constraints, i, c)
> > > + for (constraint_expr &c : *constraints)
> > > {
> > > - if (c->type == SCALAR)
> > > - c->type = DEREF;
> > > - else if (c->type == ADDRESSOF)
> > > - c->type = SCALAR;
> > > - else if (c->type == DEREF)
> > > + if (c.type == SCALAR)
> > > + c.type = DEREF;
> > > + else if (c.type == ADDRESSOF)
> > > + c.type = SCALAR;
> > > + else if (c.type == DEREF)
> > > {
> > > struct constraint_expr tmplhs;
> > > tmplhs = new_scalar_tmp_constraint_exp ("dereftmp", true);
> > > - process_constraint (new_constraint (tmplhs, *c));
> > > - c->var = tmplhs.var;
> > > + process_constraint (new_constraint (tmplhs, c));
> > > + c.var = tmplhs.var;
> > > }
> > > else
> > > gcc_unreachable ();
> > > @@ -3485,17 +3475,14 @@ do_deref (vec<ce_s> *constraints)
> > > static void
> > > get_constraint_for_address_of (tree t, vec<ce_s> *results)
> > > {
> > > - struct constraint_expr *c;
> > > - unsigned int i;
> > > -
> > > get_constraint_for_1 (t, results, true, true);
> > >
> > > - FOR_EACH_VEC_ELT (*results, i, c)
> > > + for (constraint_expr &c : *results)
> > > {
> > > - if (c->type == DEREF)
> > > - c->type = SCALAR;
> > > + if (c.type == DEREF)
> > > + c.type = SCALAR;
> > > else
> > > - c->type = ADDRESSOF;
> > > + c.type = ADDRESSOF;
> > > }
> > > }
> > >
> > > @@ -3647,11 +3634,9 @@ get_constraint_for_1 (tree t, vec<ce_s> *results,
> > > bool address_p,
> > > auto_vec<ce_s> tmp;
> > > FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (t), i, val)
> > > {
> > > - struct constraint_expr *rhsp;
> > > - unsigned j;
> > > get_constraint_for_1 (val, &tmp, address_p, lhs_p);
> > > - FOR_EACH_VEC_ELT (tmp, j, rhsp)
> > > - results->safe_push (*rhsp);
> > > + for (const constraint_expr &rhsp : tmp)
> > > + results->safe_push (rhsp);
> > > tmp.truncate (0);
> > > }
> > > /* We do not know whether the constructor was complete,
> > > @@ -3716,23 +3701,20 @@ static void
> > > process_all_all_constraints (vec<ce_s> lhsc,
> > > vec<ce_s> rhsc)
> > > {
> > > - struct constraint_expr *lhsp, *rhsp;
> > > - unsigned i, j;
> > > -
> > > if (lhsc.length () <= 1 || rhsc.length () <= 1)
> > > {
> > > - FOR_EACH_VEC_ELT (lhsc, i, lhsp)
> > > - FOR_EACH_VEC_ELT (rhsc, j, rhsp)
> > > - process_constraint (new_constraint (*lhsp, *rhsp));
> > > + for (const constraint_expr &lhsp : lhsc)
> > > + for (const constraint_expr &rhsp : rhsc)
> > > + process_constraint (new_constraint (lhsp, rhsp));
> > > }
> > > else
> > > {
> > > struct constraint_expr tmp;
> > > tmp = new_scalar_tmp_constraint_exp ("allalltmp", true);
> > > - FOR_EACH_VEC_ELT (rhsc, i, rhsp)
> > > - process_constraint (new_constraint (tmp, *rhsp));
> > > - FOR_EACH_VEC_ELT (lhsc, i, lhsp)
> > > - process_constraint (new_constraint (*lhsp, tmp));
> > > + for (const constraint_expr &rhsp : rhsc)
> > > + process_constraint (new_constraint (tmp, rhsp));
> > > + for (const constraint_expr &lhsp : lhsc)
> > > + process_constraint (new_constraint (lhsp, tmp));
> > > }
> > > }
> > >
> > > @@ -3816,16 +3798,14 @@ do_structure_copy (tree lhsop, tree rhsop)
> > > static void
> > > make_constraints_to (unsigned id, vec<ce_s> rhsc)
> > > {
> > > - struct constraint_expr *c;
> > > struct constraint_expr includes;
> > > - unsigned int j;
> > >
> > > includes.var = id;
> > > includes.offset = 0;
> > > includes.type = SCALAR;
> > >
> > > - FOR_EACH_VEC_ELT (rhsc, j, c)
> > > - process_constraint (new_constraint (includes, *c));
> > > + for (const constraint_expr &c : rhsc)
> > > + process_constraint (new_constraint (includes, c));
> > > }
> > >
> > > /* Create a constraint ID = OP. */
> > > @@ -4137,13 +4117,13 @@ handle_rhs_call (gcall *stmt, vec<ce_s> *results)
> > > && TREE_ADDRESSABLE (TREE_TYPE (gimple_call_lhs (stmt))))
> > > {
> > > auto_vec<ce_s> tmpc;
> > > - struct constraint_expr lhsc, *c;
> > > + struct constraint_expr lhsc;
> > > get_constraint_for_address_of (gimple_call_lhs (stmt), &tmpc);
> > > lhsc.var = escaped_id;
> > > lhsc.offset = 0;
> > > lhsc.type = SCALAR;
> > > - FOR_EACH_VEC_ELT (tmpc, i, c)
> > > - process_constraint (new_constraint (lhsc, *c));
> > > + for (const constraint_expr &c : tmpc)
> > > + process_constraint (new_constraint (lhsc, c));
> > > }
> > >
> > > /* Regular functions return nonlocal memory. */
> > > diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
> > > index b317df532a9..2694d1ab452 100644
> > > --- a/gcc/tree-vect-data-refs.c
> > > +++ b/gcc/tree-vect-data-refs.c
> > > @@ -290,9 +290,7 @@ vect_analyze_possibly_independent_ddr
> > > (data_dependence_relation *ddr,
> > > int loop_depth, unsigned int
> > > *max_vf)
> > > {
> > > class loop *loop = LOOP_VINFO_LOOP (loop_vinfo);
> > > - lambda_vector dist_v;
> > > - unsigned int i;
> > > - FOR_EACH_VEC_ELT (DDR_DIST_VECTS (ddr), i, dist_v)
> > > + for (lambda_vector &dist_v : DDR_DIST_VECTS (ddr))
> > > {
> > > int dist = dist_v[loop_depth];
> > > if (dist != 0 && !(dist > 0 && DDR_REVERSED_P (ddr)))
> > > @@ -729,9 +727,8 @@ vect_slp_analyze_node_dependences (vec_info *vinfo,
> > > slp_tree node,
> > > {
> > > if (stmt_info != last_store_info)
> > > continue;
> > > - unsigned i;
> > > - stmt_vec_info store_info;
> > > - FOR_EACH_VEC_ELT (stores, i, store_info)
> > > +
> > > + for (stmt_vec_info &store_info : stores)
> > > {
> > > data_reference *store_dr
> > > = STMT_VINFO_DATA_REF (store_info);
> > > @@ -804,9 +801,8 @@ vect_slp_analyze_node_dependences (vec_info *vinfo,
> > > slp_tree node,
> > > {
> > > if (stmt_info != last_store_info)
> > > continue;
> > > - unsigned i;
> > > - stmt_vec_info store_info;
> > > - FOR_EACH_VEC_ELT (stores, i, store_info)
> > > +
> > > + for (stmt_vec_info &store_info : stores)
> > > {
> > > data_reference *store_dr
> > > = STMT_VINFO_DATA_REF (store_info);
> > > @@ -868,9 +864,7 @@ vect_slp_analyze_instance_dependence (vec_info
> > > *vinfo, slp_instance instance)
> > >
> > > /* Verify we can sink loads to the vectorized stmt insert location,
> > > special-casing stores of this instance. */
> > > - slp_tree load;
> > > - unsigned int i;
> > > - FOR_EACH_VEC_ELT (SLP_INSTANCE_LOADS (instance), i, load)
> > > + for (slp_tree &load : SLP_INSTANCE_LOADS (instance))
> > > if (! vect_slp_analyze_node_dependences (vinfo, load,
> > > store
> > > ? SLP_TREE_SCALAR_STMTS
> > > (store)
> > > @@ -927,9 +921,7 @@ vect_record_base_alignments (vec_info *vinfo)
> > > {
> > > loop_vec_info loop_vinfo = dyn_cast <loop_vec_info> (vinfo);
> > > class loop *loop = loop_vinfo ? LOOP_VINFO_LOOP (loop_vinfo) : NULL;
> > > - data_reference *dr;
> > > - unsigned int i;
> > > - FOR_EACH_VEC_ELT (vinfo->shared->datarefs, i, dr)
> > > + for (data_reference *dr : vinfo->shared->datarefs)
> > > {
> > > dr_vec_info *dr_info = vinfo->lookup_dr (dr);
> > > stmt_vec_info stmt_info = dr_info->stmt;
> > > @@ -1463,10 +1455,8 @@ vect_get_peeling_costs_all_drs (loop_vec_info
> > > loop_vinfo,
> > > bool unknown_misalignment)
> > > {
> > > vec<data_reference_p> datarefs = LOOP_VINFO_DATAREFS (loop_vinfo);
> > > - unsigned i;
> > > - data_reference *dr;
> > >
> > > - FOR_EACH_VEC_ELT (datarefs, i, dr)
> > > + for (data_reference *dr : datarefs)
> > > {
> > > dr_vec_info *dr_info = loop_vinfo->lookup_dr (dr);
> > > if (!vect_relevant_for_alignment_p (dr_info))
> > > @@ -1575,13 +1565,11 @@ static bool
> > > vect_peeling_supportable (loop_vec_info loop_vinfo, dr_vec_info
> > > *dr0_info,
> > > unsigned npeel)
> > > {
> > > - unsigned i;
> > > - struct data_reference *dr = NULL;
> > > vec<data_reference_p> datarefs = LOOP_VINFO_DATAREFS (loop_vinfo);
> > > enum dr_alignment_support supportable_dr_alignment;
> > >
> > > /* Ensure that all data refs can be vectorized after the peel. */
> > > - FOR_EACH_VEC_ELT (datarefs, i, dr)
> > > + for (data_reference *dr : datarefs)
> > > {
> > > int save_misalignment;
> > >
> > > diff --git a/gcc/tree-vectorizer.c b/gcc/tree-vectorizer.c
> > > index 63ba594f227..9748043f3ee 100644
> > > --- a/gcc/tree-vectorizer.c
> > > +++ b/gcc/tree-vectorizer.c
> > > @@ -469,10 +469,7 @@ vec_info::vec_info (vec_info::vec_kind kind_in, void
> > > *target_cost_data_in,
> > >
> > > vec_info::~vec_info ()
> > > {
> > > - slp_instance instance;
> > > - unsigned int i;
> > > -
> > > - FOR_EACH_VEC_ELT (slp_instances, i, instance)
> > > + for (slp_instance &instance : slp_instances)
> > > vect_free_slp_instance (instance);
> > >
> > > destroy_cost_data (target_cost_data);
> > > @@ -739,9 +736,7 @@ vec_info::set_vinfo_for_stmt (gimple *stmt,
> > > stmt_vec_info info, bool check_ro)
> > > void
> > > vec_info::free_stmt_vec_infos (void)
> > > {
> > > - unsigned int i;
> > > - stmt_vec_info info;
> > > - FOR_EACH_VEC_ELT (stmt_vec_infos, i, info)
> > > + for (stmt_vec_info &info : stmt_vec_infos)
> > > if (info != NULL)
> > > free_stmt_vec_info (info);
> > > stmt_vec_infos.release ();
> > > --
> > > 2.20.1
> > >
