gcc-8.3/gcc/ira()
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開始行:
*参照元 [#oefa532f]
#backlinks
*説明 [#vcf5a90b]
-パス: [[gcc-8.3/gcc/ira.c]]
-FIXME: これは何？
--説明
**引数 [#ucd24358]
-FILE *f
--
**返り値 [#k01672a1]
-なし
**参考 [#wf0cea2d]
*実装 [#f3c8b080]
/* This is the main entry of IRA. */
static void
ira (FILE *f)
{
bool loops_p;
int ira_max_point_before_emit;
bool saved_flag_caller_saves = flag_caller_saves;
enum ira_region saved_flag_ira_region = flag_ira_region;
clear_bb_flags ();
-
--[[gcc-8.3/gcc/ira_region]]
--[[gcc-8.3/gcc/clear_bb_flags()]]
/* Determine if the current function is a leaf before ...
since this can impact optimizations done by the pro...
epilogue thus changing register elimination offsets.
Other target callbacks may use crtl->is_leaf too, i...
SHRINK_WRAPPING_ENABLED, so initialize as early as ...
crtl->is_leaf = leaf_function_p ();
-
--[[gcc-8.3/gcc/leaf_function_p()]]
/* Perform target specific PIC register initialization...
targetm.init_pic_reg ();
ira_conflicts_p = optimize > 0;
/* If there are too many pseudos and/or basic blocks (...
pseudos and 10K blocks or 100K pseudos and 1K block...
use simplified and faster algorithms in LRA. */
lra_simple_p
= (ira_use_lra_p
&& max_reg_num () >= (1 << 26) / last_basic_block...
if (lra_simple_p)
{
/* It permits to skip live range splitting in LRA....
flag_caller_saves = false;
/* There is no sense to do regional allocation whe...
simplified LRA. */
flag_ira_region = IRA_REGION_ONE;
ira_conflicts_p = false;
}
-
--[[gcc-8.3/gcc/max_reg_num()]]
--[[gcc-8.3/gcc/last_basic_block_for_fn()]]
#ifndef IRA_NO_OBSTACK
gcc_obstack_init (&ira_obstack);
#endif
bitmap_obstack_initialize (&ira_bitmap_obstack);
-
--[[gcc-8.3/gcc/gcc_obstack_init()]]
--[[gcc-8.3/gcc/bitmap_obstack_initialize()]]
/* LRA uses its own infrastructure to handle caller sa...
if (flag_caller_saves && !ira_use_lra_p)
init_caller_save ();
-
--[[gcc-8.3/gcc/init_caller_save()]]
if (flag_ira_verbose < 10)
{
internal_flag_ira_verbose = flag_ira_verbose;
ira_dump_file = f;
}
else
{
internal_flag_ira_verbose = flag_ira_verbose - 10;
ira_dump_file = stderr;
}
setup_prohibited_mode_move_regs ();
decrease_live_ranges_number ();
df_note_add_problem ();
-
--[[gcc-8.3/gcc/setup_prohibited_mode_move_regs()]]
--[[gcc-8.3/gcc/decrease_live_ranges_number()]]
--[[gcc-8.3/gcc/df_note_add_problem()]]
/* DF_LIVE can't be used in the register allocator, to...
parts of the compiler depend on using the "classic"...
interpretation of the DF_LR problem. See PR38711.
Remove the problem, so that we don't spend time upd...
any of the df_analyze() calls during IRA/LRA. */
if (optimize > 1)
df_remove_problem (df_live);
gcc_checking_assert (df_live == NULL);
-
--[[gcc-8.3/gcc/df_remove_problem()]]
--[[gcc-8.3/gcc/gcc_checking_assert()]]
if (flag_checking)
df->changeable_flags |= DF_VERIFY_SCHEDULED;
df_analyze ();
-
--[[gcc-8.3/gcc/df_analyze()]]
init_reg_equiv ();
if (ira_conflicts_p)
{
calculate_dominance_info (CDI_DOMINATORS);
if (split_live_ranges_for_shrink_wrap ())
df_analyze ();
free_dominance_info (CDI_DOMINATORS);
}
-
--[[gcc-8.3/gcc/init_reg_equiv()]]
df_clear_flags (DF_NO_INSN_RESCAN);
indirect_jump_optimize ();
if (delete_trivially_dead_insns (get_insns (), max_reg...
df_analyze ();
regstat_init_n_sets_and_refs ();
regstat_compute_ri ();
-
--[[gcc-8.3/gcc/df_clear_flags()]]
--[[gcc-8.3/gcc/indirect_jump_optimize()]]
--[[gcc-8.3/gcc/delete_trivially_dead_insns()]]
--[[gcc-8.3/gcc/get_insns()]]
--[[gcc-8.3/gcc/max_reg_num()]]
--[[gcc-8.3/gcc/df_analyze()]]
--[[gcc-8.3/gcc/regstat_init_n_sets_and_refs()]]
--[[gcc-8.3/gcc/regstat_compute_ri()]]
/* If we are not optimizing, then this is the only pla...
register allocation where dataflow is done. And th...
to generate these warnings. */
if (warn_clobbered)
generate_setjmp_warnings ();
if (resize_reg_info () && flag_ira_loop_pressure)
ira_set_pseudo_classes (true, ira_dump_file);
-
--[[gcc-8.3/gcc/generate_setjmp_warnings()]]
--[[gcc-8.3/gcc/resize_reg_info()]]
--[[gcc-8.3/gcc/ira_set_pseudo_classes()]]
init_alias_analysis ();
loop_optimizer_init (AVOID_CFG_MODIFICATIONS);
reg_equiv = XCNEWVEC (struct equivalence, max_reg_num ...
update_equiv_regs ();
-
--[[gcc-8.3/gcc/init_alias_analysis()]]
--[[gcc-8.3/gcc/loop_optimizer_init()]]
--[[gcc-8.3/gcc/XCNEWVEC()]]
--[[gcc-8.3/gcc/max_reg_num()]]
--[[gcc-8.3/gcc/update_equiv_regs()]]
/* Don't move insns if live range shrinkage or register
pressure-sensitive scheduling were done because it ...
improve allocation but likely worsen insn schedulin...
if (optimize
&& !flag_live_range_shrinkage
&& !(flag_sched_pressure && flag_schedule_insns))
combine_and_move_insns ();
-
--[[gcc-8.3/gcc/combine_and_move_insns()]]
/* Gather additional equivalences with memory. */
if (optimize)
add_store_equivs ();
-
--[[gcc-8.3/gcc/add_store_equivs()]]
loop_optimizer_finalize ();
free_dominance_info (CDI_DOMINATORS);
end_alias_analysis ();
free (reg_equiv);
setup_reg_equiv ();
grow_reg_equivs ();
setup_reg_equiv_init ();
allocated_reg_info_size = max_reg_num ();
-
--[[gcc-8.3/gcc/loop_optimizer_finalize()]]
--[[gcc-8.3/gcc/free_dominance_info()]]
--[[gcc-8.3/gcc/end_alias_analysis()]]
--[[gcc-8.3/gcc/setup_reg_equiv()]]
--[[gcc-8.3/gcc/grow_reg_equivs()]]
--[[gcc-8.3/gcc/setup_reg_equiv_init()]]
--[[gcc-8.3/gcc/max_reg_num()]]
/* It is not worth to do such improvement when we use ...
allocation because of -O0 usage or because the func...
big. */
if (ira_conflicts_p)
find_moveable_pseudos ();
-
--[[gcc-8.3/gcc/find_moveable_pseudos()]]
max_regno_before_ira = max_reg_num ();
ira_setup_eliminable_regset ();
-
--[[gcc-8.3/gcc/max_reg_num()]]
--[[gcc-8.3/gcc/ira_setup_eliminable_regset()]]
ira_overall_cost = ira_reg_cost = ira_mem_cost = 0;
ira_load_cost = ira_store_cost = ira_shuffle_cost = 0;
ira_move_loops_num = ira_additional_jumps_num = 0;
ira_assert (current_loops == NULL);
if (flag_ira_region == IRA_REGION_ALL || flag_ira_regi...
loop_optimizer_init (AVOID_CFG_MODIFICATIONS | LOOPS...
-
--[[gcc-8.3/gcc/loop_optimizer_init()]]
if (internal_flag_ira_verbose > 0 && ira_dump_file != ...
fprintf (ira_dump_file, "Building IRA IR\n");
loops_p = ira_build ();
ira_assert (ira_conflicts_p || !loops_p);
-
--[[gcc-8.3/gcc/ira_build()]]
--[[gcc-8.3/gcc/ira_assert()]]
saved_flag_ira_share_spill_slots = flag_ira_share_spil...
if (too_high_register_pressure_p () || cfun->calls_set...
/* It is just wasting compiler's time to pack spille...
stack slots in this case -- prohibit it. We also...
there is setjmp call because a variable not modif...
setjmp and longjmp the compiler is required to pr...
value and sharing slots does not guarantee it. */
flag_ira_share_spill_slots = FALSE;
ira_color ();
ira_max_point_before_emit = ira_max_point;
ira_initiate_emit_data ();
ira_emit (loops_p);
-
--[[gcc-8.3/gcc/too_high_register_pressure_p()]]
--[[gcc-8.3/gcc/ira_color()]]
--[[gcc-8.3/gcc/ira_initiate_emit_data()]]
--[[gcc-8.3/gcc/ira_emit()]]
max_regno = max_reg_num ();
if (ira_conflicts_p)
{
if (! loops_p)
{
if (! ira_use_lra_p)
ira_initiate_assign ();
}
-
--[[gcc-8.3/gcc/max_reg_num()]]
--[[gcc-8.3/gcc/ira\initiate_assign()]]
else
{
expand_reg_info ();
if (ira_use_lra_p)
{
ira_allocno_t a;
ira_allocno_iterator ai;
FOR_EACH_ALLOCNO (a, ai)
{
int old_regno = ALLOCNO_REGNO (a);
int new_regno = REGNO (ALLOCNO_EMIT_DA...
ALLOCNO_REGNO (a) = new_regno;
if (old_regno != new_regno)
setup_reg_classes (new_regno, reg_pr...
reg_alternate_cla...
reg_allocno_class...
}
}
-
--[[gcc-8.3/gcc/ira_allocno_t]]
--[[gcc-8.3/gcc/ira_allocno_iterator]]
--[[gcc-8.3/gcc/FOR_EACH_ALLOC_NO()]]
else
{
if (internal_flag_ira_verbose > 0 && ira_dump_fil...
fprintf (ira_dump_file, "Flattening IR\n");
ira_flattening (max_regno_before_ira, ira_max_poi...
}
-
--[[gcc-8.3/gcc/ira_flattening()]]
/* New insns were generated: add notes and recalculat...
info. */
df_analyze ();
/* ??? Rebuild the loop tree, but why? Does the loop...
change if new insns were generated? Can that be h...
by updating the loop tree incrementally? */
loop_optimizer_finalize ();
free_dominance_info (CDI_DOMINATORS);
loop_optimizer_init (AVOID_CFG_MODIFICATIONS
| LOOPS_HAVE_RECORDED_EXITS);
-
--[[gcc-8.3/gcc/df_analyze()]]
--[[gcc-8.3/gcc/loop_optimizer_finalize()]]
--[[gcc-8.3/gcc/free_dominance_info()]]
--[[gcc-8.3/gcc/loop_optimizer_init()]]
if (! ira_use_lra_p)
{
setup_allocno_assignment_flags ();
ira_initiate_assign ();
ira_reassign_conflict_allocnos (max_regno);
}
}
}
-
--[[gcc-8.3/gcc/setup_allocno_assignment_flags()]]
--[[gcc-8.3/gcc/ira_initiate_assign()]]
--[[gcc-8.3/gcc/ira_reassign_conflict_allocnos()]]
ira_finish_emit_data ();
setup_reg_renumber ();
calculate_allocation_cost ();
-
--[[gcc-8.3/gcc/ira_finish_emit_data()]]
--[[gcc-8.3/gcc/setup_reg_renumber()]]
--[[gcc-8.3/gcc/calculate_allocation_cost()]]
#ifdef ENABLE_IRA_CHECKING
if (ira_conflicts_p && ! ira_use_lra_p)
/* Opposite to reload pass, LRA does not use any con...
from IRA. We don't rebuild conflict info for LRA...
ira_flattening call) and can not use the check he...
rebuild this info for LRA in the check mode but t...
that code generated with the check and without it...
different. Calling ira_flattening in any mode wo...
wasting CPU time. So do not check the allocation...
check_allocation ();
#endif
-
--[[gcc-8.3/gcc/check_allocation()]]
if (max_regno != max_regno_before_ira)
{
regstat_free_n_sets_and_refs ();
regstat_free_ri ();
regstat_init_n_sets_and_refs ();
regstat_compute_ri ();
}
-
--[[gcc-8.3/gcc/regstat_free_n_sets_and_refs()]]
--[[gcc-8.3/gcc/regstat_free_ri()]]
--[[gcc-8.3/gcc/regstat_compute_ri()]]
overall_cost_before = ira_overall_cost;
if (! ira_conflicts_p)
grow_reg_equivs ();
else
{
fix_reg_equiv_init ();
#ifdef ENABLE_IRA_CHECKING
print_redundant_copies ();
#endif
if (! ira_use_lra_p)
{
ira_spilled_reg_stack_slots_num = 0;
ira_spilled_reg_stack_slots
= ((struct ira_spilled_reg_stack_slot *)
ira_allocate (max_regno
* sizeof (struct ira_spilled_reg_stack_slot)));
memset (ira_spilled_reg_stack_slots, 0,
max_regno * sizeof (struct ira_spilled_reg_stack_slo...
}
}
allocate_initial_values ();
-
--[[gcc-8.3/gcc/grow_reg_equivs()]]
--[[gcc-8.3/gcc/fix_reg_equiv_init()]]
--[[gcc-8.3/gcc/print_redundant_copies()]]
--[[gcc-8.3/gcc/ira_spilled_reg_stack_slot]]
--[[gcc-8.3/gcc/ira_allocate()]]
--[[gcc-8.3/gcc/allocate_initial_values()]]
/* See comment for find_moveable_pseudos call. */
if (ira_conflicts_p)
move_unallocated_pseudos ();
-
--[[gcc-8.3/gcc/move_unallocated_pseudos()]]
/* Restore original values. */
if (lra_simple_p)
{
flag_caller_saves = saved_flag_caller_saves;
flag_ira_region = saved_flag_ira_region;
}
}
*コメント [#g739a617]
終了行:
*参照元 [#oefa532f]
#backlinks
*説明 [#vcf5a90b]
-パス: [[gcc-8.3/gcc/ira.c]]
-FIXME: これは何？
--説明
**引数 [#ucd24358]
-FILE *f
--
**返り値 [#k01672a1]
-なし
**参考 [#wf0cea2d]
*実装 [#f3c8b080]
/* This is the main entry of IRA. */
static void
ira (FILE *f)
{
bool loops_p;
int ira_max_point_before_emit;
bool saved_flag_caller_saves = flag_caller_saves;
enum ira_region saved_flag_ira_region = flag_ira_region;
clear_bb_flags ();
-
--[[gcc-8.3/gcc/ira_region]]
--[[gcc-8.3/gcc/clear_bb_flags()]]
/* Determine if the current function is a leaf before ...
since this can impact optimizations done by the pro...
epilogue thus changing register elimination offsets.
Other target callbacks may use crtl->is_leaf too, i...
SHRINK_WRAPPING_ENABLED, so initialize as early as ...
crtl->is_leaf = leaf_function_p ();
-
--[[gcc-8.3/gcc/leaf_function_p()]]
/* Perform target specific PIC register initialization...
targetm.init_pic_reg ();
ira_conflicts_p = optimize > 0;
/* If there are too many pseudos and/or basic blocks (...
pseudos and 10K blocks or 100K pseudos and 1K block...
use simplified and faster algorithms in LRA. */
lra_simple_p
= (ira_use_lra_p
&& max_reg_num () >= (1 << 26) / last_basic_block...
if (lra_simple_p)
{
/* It permits to skip live range splitting in LRA....
flag_caller_saves = false;
/* There is no sense to do regional allocation whe...
simplified LRA. */
flag_ira_region = IRA_REGION_ONE;
ira_conflicts_p = false;
}
-
--[[gcc-8.3/gcc/max_reg_num()]]
--[[gcc-8.3/gcc/last_basic_block_for_fn()]]
#ifndef IRA_NO_OBSTACK
gcc_obstack_init (&ira_obstack);
#endif
bitmap_obstack_initialize (&ira_bitmap_obstack);
-
--[[gcc-8.3/gcc/gcc_obstack_init()]]
--[[gcc-8.3/gcc/bitmap_obstack_initialize()]]
/* LRA uses its own infrastructure to handle caller sa...
if (flag_caller_saves && !ira_use_lra_p)
init_caller_save ();
-
--[[gcc-8.3/gcc/init_caller_save()]]
if (flag_ira_verbose < 10)
{
internal_flag_ira_verbose = flag_ira_verbose;
ira_dump_file = f;
}
else
{
internal_flag_ira_verbose = flag_ira_verbose - 10;
ira_dump_file = stderr;
}
setup_prohibited_mode_move_regs ();
decrease_live_ranges_number ();
df_note_add_problem ();
-
--[[gcc-8.3/gcc/setup_prohibited_mode_move_regs()]]
--[[gcc-8.3/gcc/decrease_live_ranges_number()]]
--[[gcc-8.3/gcc/df_note_add_problem()]]
/* DF_LIVE can't be used in the register allocator, to...
parts of the compiler depend on using the "classic"...
interpretation of the DF_LR problem. See PR38711.
Remove the problem, so that we don't spend time upd...
any of the df_analyze() calls during IRA/LRA. */
if (optimize > 1)
df_remove_problem (df_live);
gcc_checking_assert (df_live == NULL);
-
--[[gcc-8.3/gcc/df_remove_problem()]]
--[[gcc-8.3/gcc/gcc_checking_assert()]]
if (flag_checking)
df->changeable_flags |= DF_VERIFY_SCHEDULED;
df_analyze ();
-
--[[gcc-8.3/gcc/df_analyze()]]
init_reg_equiv ();
if (ira_conflicts_p)
{
calculate_dominance_info (CDI_DOMINATORS);
if (split_live_ranges_for_shrink_wrap ())
df_analyze ();
free_dominance_info (CDI_DOMINATORS);
}
-
--[[gcc-8.3/gcc/init_reg_equiv()]]
df_clear_flags (DF_NO_INSN_RESCAN);
indirect_jump_optimize ();
if (delete_trivially_dead_insns (get_insns (), max_reg...
df_analyze ();
regstat_init_n_sets_and_refs ();
regstat_compute_ri ();
-
--[[gcc-8.3/gcc/df_clear_flags()]]
--[[gcc-8.3/gcc/indirect_jump_optimize()]]
--[[gcc-8.3/gcc/delete_trivially_dead_insns()]]
--[[gcc-8.3/gcc/get_insns()]]
--[[gcc-8.3/gcc/max_reg_num()]]
--[[gcc-8.3/gcc/df_analyze()]]
--[[gcc-8.3/gcc/regstat_init_n_sets_and_refs()]]
--[[gcc-8.3/gcc/regstat_compute_ri()]]
/* If we are not optimizing, then this is the only pla...
register allocation where dataflow is done. And th...
to generate these warnings. */
if (warn_clobbered)
generate_setjmp_warnings ();
if (resize_reg_info () && flag_ira_loop_pressure)
ira_set_pseudo_classes (true, ira_dump_file);
-
--[[gcc-8.3/gcc/generate_setjmp_warnings()]]
--[[gcc-8.3/gcc/resize_reg_info()]]
--[[gcc-8.3/gcc/ira_set_pseudo_classes()]]
init_alias_analysis ();
loop_optimizer_init (AVOID_CFG_MODIFICATIONS);
reg_equiv = XCNEWVEC (struct equivalence, max_reg_num ...
update_equiv_regs ();
-
--[[gcc-8.3/gcc/init_alias_analysis()]]
--[[gcc-8.3/gcc/loop_optimizer_init()]]
--[[gcc-8.3/gcc/XCNEWVEC()]]
--[[gcc-8.3/gcc/max_reg_num()]]
--[[gcc-8.3/gcc/update_equiv_regs()]]
/* Don't move insns if live range shrinkage or register
pressure-sensitive scheduling were done because it ...
improve allocation but likely worsen insn schedulin...
if (optimize
&& !flag_live_range_shrinkage
&& !(flag_sched_pressure && flag_schedule_insns))
combine_and_move_insns ();
-
--[[gcc-8.3/gcc/combine_and_move_insns()]]
/* Gather additional equivalences with memory. */
if (optimize)
add_store_equivs ();
-
--[[gcc-8.3/gcc/add_store_equivs()]]
loop_optimizer_finalize ();
free_dominance_info (CDI_DOMINATORS);
end_alias_analysis ();
free (reg_equiv);
setup_reg_equiv ();
grow_reg_equivs ();
setup_reg_equiv_init ();
allocated_reg_info_size = max_reg_num ();
-
--[[gcc-8.3/gcc/loop_optimizer_finalize()]]
--[[gcc-8.3/gcc/free_dominance_info()]]
--[[gcc-8.3/gcc/end_alias_analysis()]]
--[[gcc-8.3/gcc/setup_reg_equiv()]]
--[[gcc-8.3/gcc/grow_reg_equivs()]]
--[[gcc-8.3/gcc/setup_reg_equiv_init()]]
--[[gcc-8.3/gcc/max_reg_num()]]
/* It is not worth to do such improvement when we use ...
allocation because of -O0 usage or because the func...
big. */
if (ira_conflicts_p)
find_moveable_pseudos ();
-
--[[gcc-8.3/gcc/find_moveable_pseudos()]]
max_regno_before_ira = max_reg_num ();
ira_setup_eliminable_regset ();
-
--[[gcc-8.3/gcc/max_reg_num()]]
--[[gcc-8.3/gcc/ira_setup_eliminable_regset()]]
ira_overall_cost = ira_reg_cost = ira_mem_cost = 0;
ira_load_cost = ira_store_cost = ira_shuffle_cost = 0;
ira_move_loops_num = ira_additional_jumps_num = 0;
ira_assert (current_loops == NULL);
if (flag_ira_region == IRA_REGION_ALL || flag_ira_regi...
loop_optimizer_init (AVOID_CFG_MODIFICATIONS | LOOPS...
-
--[[gcc-8.3/gcc/loop_optimizer_init()]]
if (internal_flag_ira_verbose > 0 && ira_dump_file != ...
fprintf (ira_dump_file, "Building IRA IR\n");
loops_p = ira_build ();
ira_assert (ira_conflicts_p || !loops_p);
-
--[[gcc-8.3/gcc/ira_build()]]
--[[gcc-8.3/gcc/ira_assert()]]
saved_flag_ira_share_spill_slots = flag_ira_share_spil...
if (too_high_register_pressure_p () || cfun->calls_set...
/* It is just wasting compiler's time to pack spille...
stack slots in this case -- prohibit it. We also...
there is setjmp call because a variable not modif...
setjmp and longjmp the compiler is required to pr...
value and sharing slots does not guarantee it. */
flag_ira_share_spill_slots = FALSE;
ira_color ();
ira_max_point_before_emit = ira_max_point;
ira_initiate_emit_data ();
ira_emit (loops_p);
-
--[[gcc-8.3/gcc/too_high_register_pressure_p()]]
--[[gcc-8.3/gcc/ira_color()]]
--[[gcc-8.3/gcc/ira_initiate_emit_data()]]
--[[gcc-8.3/gcc/ira_emit()]]
max_regno = max_reg_num ();
if (ira_conflicts_p)
{
if (! loops_p)
{
if (! ira_use_lra_p)
ira_initiate_assign ();
}
-
--[[gcc-8.3/gcc/max_reg_num()]]
--[[gcc-8.3/gcc/ira\initiate_assign()]]
else
{
expand_reg_info ();
if (ira_use_lra_p)
{
ira_allocno_t a;
ira_allocno_iterator ai;
FOR_EACH_ALLOCNO (a, ai)
{
int old_regno = ALLOCNO_REGNO (a);
int new_regno = REGNO (ALLOCNO_EMIT_DA...
ALLOCNO_REGNO (a) = new_regno;
if (old_regno != new_regno)
setup_reg_classes (new_regno, reg_pr...
reg_alternate_cla...
reg_allocno_class...
}
}
-
--[[gcc-8.3/gcc/ira_allocno_t]]
--[[gcc-8.3/gcc/ira_allocno_iterator]]
--[[gcc-8.3/gcc/FOR_EACH_ALLOC_NO()]]
else
{
if (internal_flag_ira_verbose > 0 && ira_dump_fil...
fprintf (ira_dump_file, "Flattening IR\n");
ira_flattening (max_regno_before_ira, ira_max_poi...
}
-
--[[gcc-8.3/gcc/ira_flattening()]]
/* New insns were generated: add notes and recalculat...
info. */
df_analyze ();
/* ??? Rebuild the loop tree, but why? Does the loop...
change if new insns were generated? Can that be h...
by updating the loop tree incrementally? */
loop_optimizer_finalize ();
free_dominance_info (CDI_DOMINATORS);
loop_optimizer_init (AVOID_CFG_MODIFICATIONS
| LOOPS_HAVE_RECORDED_EXITS);
-
--[[gcc-8.3/gcc/df_analyze()]]
--[[gcc-8.3/gcc/loop_optimizer_finalize()]]
--[[gcc-8.3/gcc/free_dominance_info()]]
--[[gcc-8.3/gcc/loop_optimizer_init()]]
if (! ira_use_lra_p)
{
setup_allocno_assignment_flags ();
ira_initiate_assign ();
ira_reassign_conflict_allocnos (max_regno);
}
}
}
-
--[[gcc-8.3/gcc/setup_allocno_assignment_flags()]]
--[[gcc-8.3/gcc/ira_initiate_assign()]]
--[[gcc-8.3/gcc/ira_reassign_conflict_allocnos()]]
ira_finish_emit_data ();
setup_reg_renumber ();
calculate_allocation_cost ();
-
--[[gcc-8.3/gcc/ira_finish_emit_data()]]
--[[gcc-8.3/gcc/setup_reg_renumber()]]
--[[gcc-8.3/gcc/calculate_allocation_cost()]]
#ifdef ENABLE_IRA_CHECKING
if (ira_conflicts_p && ! ira_use_lra_p)
/* Opposite to reload pass, LRA does not use any con...
from IRA. We don't rebuild conflict info for LRA...
ira_flattening call) and can not use the check he...
rebuild this info for LRA in the check mode but t...
that code generated with the check and without it...
different. Calling ira_flattening in any mode wo...
wasting CPU time. So do not check the allocation...
check_allocation ();
#endif
-
--[[gcc-8.3/gcc/check_allocation()]]
if (max_regno != max_regno_before_ira)
{
regstat_free_n_sets_and_refs ();
regstat_free_ri ();
regstat_init_n_sets_and_refs ();
regstat_compute_ri ();
}
-
--[[gcc-8.3/gcc/regstat_free_n_sets_and_refs()]]
--[[gcc-8.3/gcc/regstat_free_ri()]]
--[[gcc-8.3/gcc/regstat_compute_ri()]]
overall_cost_before = ira_overall_cost;
if (! ira_conflicts_p)
grow_reg_equivs ();
else
{
fix_reg_equiv_init ();
#ifdef ENABLE_IRA_CHECKING
print_redundant_copies ();
#endif
if (! ira_use_lra_p)
{
ira_spilled_reg_stack_slots_num = 0;
ira_spilled_reg_stack_slots
= ((struct ira_spilled_reg_stack_slot *)
ira_allocate (max_regno
* sizeof (struct ira_spilled_reg_stack_slot)));
memset (ira_spilled_reg_stack_slots, 0,
max_regno * sizeof (struct ira_spilled_reg_stack_slo...
}
}
allocate_initial_values ();
-
--[[gcc-8.3/gcc/grow_reg_equivs()]]
--[[gcc-8.3/gcc/fix_reg_equiv_init()]]
--[[gcc-8.3/gcc/print_redundant_copies()]]
--[[gcc-8.3/gcc/ira_spilled_reg_stack_slot]]
--[[gcc-8.3/gcc/ira_allocate()]]
--[[gcc-8.3/gcc/allocate_initial_values()]]
/* See comment for find_moveable_pseudos call. */
if (ira_conflicts_p)
move_unallocated_pseudos ();
-
--[[gcc-8.3/gcc/move_unallocated_pseudos()]]
/* Restore original values. */
if (lra_simple_p)
{
flag_caller_saves = saved_flag_caller_saves;
flag_ira_region = saved_flag_ira_region;
}
}
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