#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "target.h"
#include "rtl.h"
#include "tree.h"
#include "df.h"
#include "memmodel.h"
#include "tm_p.h"
#include "insn-config.h"
#include "regs.h"
#include "ira.h"
#include "recog.h"
#include "diagnostic-core.h"
#include "reload.h"
#include "output.h"
#include "tree-pass.h"
#include "function-abi.h"

Include dependency graph for reginfo.cc:

Data Structures
class	simplifiable_subreg

struct	reg_pref

Macros
#define	call_used_regs (this_target_hard_regs->x_call_used_regs)

#define	regs_invalidated_by_call (this_target_hard_regs->x_regs_invalidated_by_call)

#define	N_REG_INTS ((FIRST_PSEUDO_REGISTER + (32 - 1)) / 32)

Functions
static void	clear_global_regs_cache (void)

void	reginfo_cc_finalize (void)

void	init_reg_class_start_regs ()

void	reg_set_to_hard_reg_set (HARD_REG_SET *to, const_bitmap from)

void	init_reg_sets (void)

void	save_register_info (void)

static void	restore_register_info (void)

static void	init_reg_sets_1 (void)

void	init_reg_modes_target (void)

void	init_regs (void)

void	reinit_regs (void)

void	init_fake_stack_mems (void)

int	register_move_cost (machine_mode mode, reg_class_t from, reg_class_t to)

int	memory_move_cost (machine_mode mode, reg_class_t rclass, bool in)

int	memory_move_secondary_cost (machine_mode mode, reg_class_t rclass, bool in)

machine_mode	choose_hard_reg_mode (unsigned int regno, unsigned int nregs, const predefined_function_abi *abi)

void	fix_register (const char *name, int fixed, int call_used)

void	globalize_reg (tree decl, int i)

enum reg_class	reg_preferred_class (int regno)

enum reg_class	reg_alternate_class (int regno)

enum reg_class	reg_allocno_class (int regno)

static void	allocate_reg_info (void)

bool	resize_reg_info (void)

void	free_reg_info (void)

static unsigned int	reginfo_init (void)

rtl_opt_pass *	make_pass_reginfo_init (gcc::context *ctxt)

void	setup_reg_classes (int regno, enum reg_class prefclass, enum reg_class altclass, enum reg_class allocnoclass)

static void	reg_scan_mark_refs (rtx, rtx_insn *)

void	reg_scan (rtx_insn *f, unsigned int nregs)

bool	reg_class_subset_p (reg_class_t c1, reg_class_t c2)

bool	reg_classes_intersect_p (reg_class_t c1, reg_class_t c2)

const HARD_REG_SET &	simplifiable_subregs (const subreg_shape &shape)

static void	record_subregs_of_mode (rtx subreg, bool partial_def)

static void	find_subregs_of_mode (rtx x)

void	init_subregs_of_mode (void)

const HARD_REG_SET *	valid_mode_changes_for_regno (unsigned int regno)

void	finish_subregs_of_mode (void)

Variables
int	max_regno

struct target_hard_regs	default_target_hard_regs

struct target_regs	default_target_regs

static const char	initial_fixed_regs [] = FIXED_REGISTERS

static const char	initial_call_used_regs [] = CALL_USED_REGISTERS

char	global_regs [FIRST_PSEUDO_REGISTER]

HARD_REG_SET	global_reg_set

tree	global_regs_decl [FIRST_PSEUDO_REGISTER]

static const unsigned	int_reg_class_contents [N_REG_CLASSES][N_REG_INTS] = REG_CLASS_CONTENTS

static const char *const	initial_reg_names [] = REGISTER_NAMES

const char *	reg_class_names [] = REG_CLASS_NAMES

static int	no_global_reg_vars = 0

static char	saved_fixed_regs [FIRST_PSEUDO_REGISTER]

static char	saved_call_used_regs [FIRST_PSEUDO_REGISTER]

static const char *	saved_reg_names [FIRST_PSEUDO_REGISTER]

static HARD_REG_SET	saved_accessible_reg_set

static HARD_REG_SET	saved_operand_reg_set

static struct reg_pref *	reg_pref

static int	reg_info_size

static int	max_regno_since_last_resize

static HARD_REG_SET **	valid_mode_changes

static obstack	valid_mode_changes_obstack

Macro Definition Documentation

◆ call_used_regs

#define call_used_regs (this_target_hard_regs->x_call_used_regs)

Referenced by fix_register(), globalize_reg(), init_reg_sets(), init_reg_sets_1(), restore_register_info(), and save_register_info().

◆ N_REG_INTS

#define N_REG_INTS ((FIRST_PSEUDO_REGISTER + (32 - 1)) / 32)

Used to initialize reg_alloc_order.

The same information, but as an array of unsigned ints.  We copy from
these unsigned ints to the table above.  We do this so the tm.h files
do not have to be aware of the wordsize for machines with <= 64 regs.
Note that we hard-code 32 here, not HOST_BITS_PER_INT.

◆ regs_invalidated_by_call

#define regs_invalidated_by_call (this_target_hard_regs->x_regs_invalidated_by_call)

Referenced by globalize_reg(), and init_reg_sets_1().

Function Documentation

◆ allocate_reg_info()

static void allocate_reg_info ( void )

static

Allocate space for reg info and initilize it.

References reg_pref::allocnoclass, reg_pref::altclass, gcc_assert, i, max_reg_num(), max_regno_since_last_resize, reg_pref::prefclass, reg_info_size, and reg_renumber.

Referenced by resize_reg_info().

◆ choose_hard_reg_mode()

machine_mode choose_hard_reg_mode	(	unsigned int	regno,
		unsigned int	nregs,
		const predefined_function_abi *	abi )

Return a machine mode that is legitimate for hard reg REGNO and large
enough to save nregs.  If we can't find one, return VOIDmode.
If ABI is nonnull, only consider modes that are preserved across
calls that use ABI.

References predefined_function_abi::clobbers_reg_p(), FOR_EACH_MODE_IN_CLASS, GET_MODE_SIZE(), hard_regno_nregs(), maybe_gt, and targetm.

Referenced by default_dwarf_frame_reg_mode(), init_reg_modes_target(), and zcur_select_mode_rtx().

◆ clear_global_regs_cache()

static void clear_global_regs_cache ( void )

static

References global_regs, global_regs_decl, i, and NULL.

Referenced by reginfo_cc_finalize().

◆ find_subregs_of_mode()

static void find_subregs_of_mode ( rtx x )

static

Call record_subregs_of_mode for all the subregs in X.

References find_subregs_of_mode(), GET_CODE, GET_RTX_FORMAT, GET_RTX_LENGTH, i, record_subregs_of_mode(), XEXP, XVECEXP, and XVECLEN.

Referenced by find_subregs_of_mode(), and init_subregs_of_mode().

◆ finish_subregs_of_mode()

void finish_subregs_of_mode ( void )

References NULL, valid_mode_changes, and valid_mode_changes_obstack.

Referenced by finish_costs().

◆ fix_register()

void fix_register	(	const char *	name,
		int	fixed,
		int	call_used )

Specify the usage characteristics of the register named NAME.
It should be a fixed register if FIXED and a
call-used register if CALL_USED.

References call_used_regs, decode_reg_name_and_count(), error(), fixed_regs, gcc_assert, gcc_unreachable, HARD_FRAME_POINTER_REGNUM, i, and warning().

Referenced by handle_common_deferred_options().

◆ free_reg_info()

void free_reg_info ( void )

Free up the space allocated by allocate_reg_info.

References free(), NULL, and reg_renumber.

Referenced by move_loop_invariants(), one_code_hoisting_pass(), and rest_of_handle_final().

◆ globalize_reg()

void globalize_reg	(	tree	decl,
		int	i )

Mark register number I as global.

References call_used_regs, DECL_SOURCE_LOCATION, error(), error_at(), fixed_reg_set, fixed_regs, function_abis, global_reg_set, global_regs, global_regs_decl, i, IN_RANGE, inform(), no_global_reg_vars, NUM_ABI_IDS, regs_invalidated_by_call, reinit_regs(), SET_HARD_REG_BIT, and warning_at().

Referenced by make_decl_rtl().

◆ init_fake_stack_mems()

void init_fake_stack_mems ( void )

Initialize some fake stack-frame MEM references for use in
memory_move_secondary_cost.

References gen_rtx_MEM(), i, stack_pointer_rtx, and top_of_stack.

Referenced by backend_init_target().

◆ init_reg_class_start_regs()

void init_reg_class_start_regs ( )

extern

In insn-preds.cc.

Referenced by init_reg_sets().

◆ init_reg_modes_target()

void init_reg_modes_target ( void )

Compute the table of register modes.
  These values are used to record death information for individual registers
  (as opposed to a multi-register mode).
  This function might be invoked more than once, if the target has support
  for changing register usage conventions on a per-function basis.

References choose_hard_reg_mode(), hard_regno_nregs(), i, NULL, reg_raw_mode, targetm, this_target_regs, and word_mode.

Referenced by init_emit_regs().

◆ init_reg_sets()

void init_reg_sets ( void )

Function called only once per target_globals to initialize the
target_hard_regs structure.  Once this is done, various switches
may override.

References accessible_reg_set, call_used_regs, CLEAR_HARD_REG_SET, fixed_regs, gcc_assert, i, init_reg_class_start_regs(), initial_call_used_regs, initial_fixed_regs, initial_reg_names, int_reg_class_contents, operand_reg_set, reg_alloc_order, reg_class_contents, reg_names, SET_HARD_REG_BIT, and SET_HARD_REG_SET.

Referenced by general_init().

◆ init_reg_sets_1()

static void init_reg_sets_1 ( void )

static

After switches have been processed, which perhaps alter
`fixed_regs' and `call_used_regs', convert them to HARD_REG_SETs.

References accessible_reg_set, call_used_regs, class_only_fixed_regs, CLEAR_HARD_REG_BIT, CLEAR_HARD_REG_SET, contains_allocatable_reg_of_mode, contains_reg_of_mode, default_function_abi, EH_RETURN_DATA_REGNO, eh_return_data_regs, fixed_nonglobal_reg_set, fixed_reg_set, fixed_regs, global_reg_set, global_regs, HARD_FRAME_POINTER_IS_FRAME_POINTER, HARD_FRAME_POINTER_REGNUM, hard_reg_set_intersect_p(), hard_reg_set_subset_p(), have_regs_of_mode, i, inv_reg_alloc_order, INVALID_REGNUM, operand_reg_set, PIC_OFFSET_TABLE_REG_CALL_CLOBBERED, PIC_OFFSET_TABLE_REGNUM, reg_alloc_order, reg_class_contents, reg_class_size, reg_class_subclasses, reg_class_subunion, reg_class_superunion, regs_invalidated_by_call, restore_register_info(), savable_regs, SET_HARD_REG_BIT, SET_HARD_REG_SET, targetm, and TEST_HARD_REG_BIT.

Referenced by init_regs().

◆ init_regs()

void init_regs ( void )

Finish initializing the register sets and initialize the register modes.
  This function might be invoked more than once, if the target has support
  for changing register usage conventions on a per-function basis.

References init_reg_sets_1().

Referenced by add_removable_extension(), backend_init(), reinit_regs(), and target_reinit().

◆ init_subregs_of_mode()

void init_subregs_of_mode ( void )

References cfun, DF_REF_FLAGS_IS_SET, DF_REF_PARTIAL, DF_REF_REG, find_subregs_of_mode(), FOR_BB_INSNS, FOR_EACH_BB_FN, FOR_EACH_INSN_DEF, gcc_obstack_init, max_reg_num(), NONDEBUG_INSN_P, PATTERN(), read_modify_subreg_p(), record_subregs_of_mode(), valid_mode_changes, and valid_mode_changes_obstack.

Referenced by init_costs().

◆ make_pass_reginfo_init()

rtl_opt_pass * make_pass_reginfo_init ( gcc::context * ctxt )

◆ memory_move_cost()

int memory_move_cost	(	machine_mode	mode,
		reg_class_t	rclass,
		bool	in )

Compute cost of moving registers to/from memory.

References targetm.

Referenced by choose_reload_regs(), reload_cse_simplify_set(), and setup_class_subset_and_memory_move_costs().

◆ memory_move_secondary_cost()

int memory_move_secondary_cost	(	machine_mode	mode,
		reg_class_t	rclass,
		bool	in )

Compute extra cost of moving registers to/from memory due to reloads.
Only needed if secondary reloads are required for memory moves.

References memory_move_secondary_cost(), register_move_cost(), secondary_reload_class(), and top_of_stack.

Referenced by default_memory_move_cost(), and memory_move_secondary_cost().

◆ record_subregs_of_mode()

static void record_subregs_of_mode	(	rtx	subreg,
		bool	partial_def )

static

Restrict the choice of register for SUBREG_REG (SUBREG) based
on information about SUBREG.

If PARTIAL_DEF, SUBREG is a partial definition of a multipart inner
register and we want to ensure that the other parts of the inner
register are correctly preserved.  If !PARTIAL_DEF we need to
ensure that SUBREG itself can be formed.

References gcc_checking_assert, GET_MODE_SIZE(), subreg_shape::inner_mode, known_ge, known_lt, subreg_shape::offset, subreg_shape::outer_mode, REG_P, REGMODE_NATURAL_SIZE, REGNO, shape_of_subreg(), simplifiable_subregs(), SUBREG_REG, valid_mode_changes, and valid_mode_changes_obstack.

Referenced by find_subregs_of_mode(), and init_subregs_of_mode().

◆ reg_allocno_class()

enum reg_class reg_allocno_class ( int regno )

Return the reg_class which is used by IRA for its allocation.

References reg_pref::allocnoclass, gcc_assert, and reg_info_size.

Referenced by get_pressure_class_and_nregs(), get_pressure_class_and_nregs(), get_regno_pressure_class(), get_regno_pressure_class(), ira(), lra_get_allocno_class(), move_invariants(), and setup_preferred_alternate_classes_for_new_pseudos().

◆ reg_alternate_class()

enum reg_class reg_alternate_class ( int regno )

References reg_pref::altclass, gcc_assert, and reg_info_size.

Referenced by dump_reg_info(), find_reloads(), ira(), move_invariants(), must_not_spill_p(), and setup_preferred_alternate_classes_for_new_pseudos().

◆ reg_class_subset_p()

bool reg_class_subset_p	(	reg_class_t	c1,
		reg_class_t	c2 )

Return true if C1 is a subset of C2, i.e., if every register in C1
is also in C2.

References hard_reg_set_subset_p(), and reg_class_contents.

Referenced by combine_reloads(), default_secondary_reload(), find_reloads(), find_reusable_reload(), push_reload(), push_secondary_reload(), and setup_reg_class_relations().

◆ reg_classes_intersect_p()

bool reg_classes_intersect_p	(	reg_class_t	c1,
		reg_class_t	c2 )

Return true if there is a register that is in both C1 and C2.

References hard_reg_set_intersect_p(), and reg_class_contents.

Referenced by check_and_make_def_conflict(), check_and_make_def_use_conflict(), choose_reload_regs(), gain_for_invariant(), and make_pseudo_conflict().

◆ reg_preferred_class()

enum reg_class reg_preferred_class ( int regno )

Return the reg_class in which pseudo reg number REGNO is best allocated.
This function is sometimes called before the info has been computed.
When that happens, just return GENERAL_REGS, which is innocuous.

References gcc_assert, reg_pref::prefclass, and reg_info_size.

Referenced by dump_reg_info(), find_costs_and_classes(), find_hard_regno_for(), find_reloads(), ira(), ira_bad_reload_regno_1(), ira_get_dup_out_num(), move_invariants(), must_not_spill_p(), setup_preferred_alternate_classes_for_new_pseudos(), update_conflict_hard_reg_costs(), and update_equiv_regs().

◆ reg_scan()

void reg_scan	(	rtx_insn *	f,
		unsigned int	nregs )

References INSN_P, NEXT_INSN(), PATTERN(), REG_NOTES, reg_scan_mark_refs(), timevar_pop(), and timevar_push().

Referenced by cse_main().

◆ reg_scan_mark_refs()

static void reg_scan_mark_refs	(	rtx	x,
		rtx_insn *	insn )

static

This is the `regscan' pass of the compiler, run just before cse and
again just before loop.  It finds the first and last use of each
pseudo-register.

X is the expression to scan.  INSN is the insn it appears in.
NOTE_FLAG is nonzero if X is from INSN's notes rather than its body.
We should only record information for REGs with numbers
greater than or equal to MIN_REGNO.

References CASE_CONST_ANY, CONST_INT_P, DF_REG_DEF_COUNT, find_reg_note(), GET_CODE, GET_RTX_FORMAT, GET_RTX_LENGTH, i, MEM_P, REG_ATTRS, REG_P, REG_POINTER, reg_scan_mark_refs(), REG_USERVAR_P, REGNO, SET, SET_DEST, set_reg_attrs_from_value(), SET_SRC, XEXP, XVEC, XVECEXP, and XVECLEN.

Referenced by reg_scan(), and reg_scan_mark_refs().

◆ reg_set_to_hard_reg_set()

void reg_set_to_hard_reg_set	(	HARD_REG_SET *	to,
		const_bitmap	from )

Given a register bitmap, turn on the bits in a HARD_REG_SET that
correspond to the hard registers, if any, set in that map.  This
could be done far more efficiently by having all sorts of special-cases
with moving single words, but probably isn't worth the trouble.

References EXECUTE_IF_SET_IN_BITMAP, i, and SET_HARD_REG_BIT.

◆ reginfo_cc_finalize()

void reginfo_cc_finalize ( void )

References clear_global_regs_cache(), CLEAR_HARD_REG_SET, global_reg_set, and no_global_reg_vars.

Referenced by toplev::finalize().

◆ reginfo_init()

static unsigned int reginfo_init ( void )

static

Initialize some global data for this pass.

References df, df_compute_regs_ever_live(), max_regno_since_last_resize, no_global_reg_vars, NULL, and reg_info_size.

◆ register_move_cost()

int register_move_cost	(	machine_mode	mode,
		reg_class_t	from,
		reg_class_t	to )

Compute cost of moving data from a register of class FROM to one of
TO, using MODE.

References targetm.

Referenced by choose_reload_regs(), find_reloads(), find_valid_class(), find_valid_class_1(), ira_init_register_move_cost(), memory_move_secondary_cost(), and reload_cse_simplify_set().

◆ reinit_regs()

void reinit_regs ( void )

The same as previous function plus initializing IRA.

References caller_save_initialized_p, init_regs(), ira_init(), recog_init(), and this_target_rtl.

Referenced by globalize_reg().

◆ resize_reg_info()

bool resize_reg_info ( void )

Resize reg info. The new elements will be initialized.  Return TRUE
if new pseudos were added since the last call.

References allocate_reg_info(), reg_pref::allocnoclass, reg_pref::altclass, gcc_assert, i, max_reg_num(), max_regno_since_last_resize, NULL, reg_pref::prefclass, reg_info_size, and reg_renumber.

Referenced by expand_reg_data(), expand_reg_info(), find_costs_and_classes(), ira(), lra_get_allocno_class(), lra_get_regno_hard_regno(), and move_invariants().

◆ restore_register_info()

static void restore_register_info ( void )

static

Restore the register information.

References accessible_reg_set, call_used_regs, fixed_regs, operand_reg_set, reg_names, saved_accessible_reg_set, saved_call_used_regs, saved_fixed_regs, saved_operand_reg_set, and saved_reg_names.

Referenced by init_reg_sets_1().

◆ save_register_info()

void save_register_info ( void )

Save the register information.

References accessible_reg_set, call_used_regs, fixed_regs, gcc_assert, operand_reg_set, reg_names, saved_accessible_reg_set, saved_call_used_regs, saved_fixed_regs, saved_operand_reg_set, and saved_reg_names.

Referenced by backend_init().

◆ setup_reg_classes()

void setup_reg_classes	(	int	regno,
		enum reg_class	prefclass,
		enum reg_class	altclass,
		enum reg_class	allocnoclass )

Set up preferred, alternate, and allocno classes for REGNO as
PREFCLASS, ALTCLASS, and ALLOCNOCLASS.

References reg_pref::allocnoclass, reg_pref::altclass, gcc_assert, max_reg_num(), NULL, reg_pref::prefclass, and reg_info_size.

Referenced by assign_by_spills(), expand_reg_info(), find_costs_and_classes(), ira(), lra_change_class(), lra_create_new_reg_with_unique_value(), move_invariants(), and setup_preferred_alternate_classes_for_new_pseudos().

◆ simplifiable_subregs()

const HARD_REG_SET & simplifiable_subregs ( const subreg_shape & shape )

Return the set of hard registers that are able to form the subreg
described by SHAPE.

References inchash::hash::add_hwi(), inchash::hash::end(), i, subreg_shape::inner_mode, subreg_shape::offset, subreg_shape::outer_mode, SET_HARD_REG_BIT, simplifiable_subreg::simplifiable_regs, simplify_subreg_regno(), targetm, this_target_hard_regs, and subreg_shape::unique_id().

Referenced by record_subregs_of_mode().

◆ valid_mode_changes_for_regno()

const HARD_REG_SET * valid_mode_changes_for_regno ( unsigned int regno )

References valid_mode_changes.

Referenced by setup_regno_cost_classes_by_aclass(), and setup_regno_cost_classes_by_mode().

Variable Documentation

◆ default_target_hard_regs

struct target_hard_regs default_target_hard_regs

◆ default_target_regs

struct target_regs default_target_regs

◆ global_reg_set

HARD_REG_SET global_reg_set

The set of global registers.

Referenced by globalize_reg(), init_reg_sets_1(), reginfo_cc_finalize(), and rtx_properties::try_to_add_insn().

◆ global_regs

char global_regs[FIRST_PSEUDO_REGISTER]

Indexed by hard register number, contains 1 for registers
that are being used for global register decls.
These must be exempt from ordinary flow analysis
and are also considered fixed.

Referenced by can_combine_p(), can_move_insns_across(), check_new_reg_p(), clear_global_regs_cache(), copy_value(), deletable_insn_p(), df_get_call_refs(), df_get_entry_block_def_set(), df_get_exit_block_use_set(), df_lr_local_compute(), distribute_notes(), do_reload(), ext_dce_process_bb(), get_defs(), globalize_reg(), hash_rtx(), init_reg_sets_1(), init_resource_info(), ira_setup_eliminable_regset(), mark_referenced_resources(), mark_target_live_regs(), peep2_find_free_register(), reload_combine_recognize_pattern(), rename_chains(), simplify_context::simplify_plus_minus(), and rtx_properties::try_to_add_insn().

◆ global_regs_decl

tree global_regs_decl[FIRST_PSEUDO_REGISTER]

Declaration for the global register.

Referenced by clear_global_regs_cache(), do_reload(), and globalize_reg().

◆ initial_call_used_regs

const char initial_call_used_regs[] = CALL_USED_REGISTERS

static

Data for initializing call_used_regs.

Referenced by init_reg_sets().

◆ initial_fixed_regs

const char initial_fixed_regs[] = FIXED_REGISTERS

static

Data for initializing fixed_regs.

Referenced by init_reg_sets().

◆ initial_reg_names

const char* const initial_reg_names[] = REGISTER_NAMES

static

Array containing all of the register names.

Referenced by init_reg_sets().

◆ int_reg_class_contents

const unsigned int_reg_class_contents[N_REG_CLASSES][N_REG_INTS] = REG_CLASS_CONTENTS

static

Referenced by init_reg_sets().

◆ max_regno

int max_regno

Compute different info about registers.
   Copyright (C) 1987-2024 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.

This file contains regscan pass of the compiler and passes for
dealing with info about modes of pseudo-registers inside
subregisters.  It also defines some tables of information about the
hardware registers, function init_reg_sets to initialize the
tables, and other auxiliary functions to deal with info about
registers and their classes.

Maximum register number used in this function, plus one.

Referenced by assign_by_spills(), build_insn_chain(), calculate_elim_costs_all_insns(), choose_reload_regs(), create_live_range_start_chains(), dead_or_predicable(), finish_spills(), fix_reg_equiv_init(), grow_reg_equivs(), if_convert(), init_eliminable_invariants(), init_live_reload_and_inheritance_pseudos(), init_lives(), init_loop_tree_node(), init_regno_assign_info(), ira(), ira_print_disposition(), ira_sort_regnos_for_alter_reg(), lra_assign(), lra_coalesce(), lra_create_live_ranges_1(), lra_final_code_change(), lra_need_for_scratch_reg_p(), lra_need_for_spills_p(), lra_remat(), lra_split_hard_reg_for(), print_live_ranges(), rebuild_regno_allocno_maps(), regstat_compute_calls_crossed(), regstat_compute_ri(), regstat_init_n_sets_and_refs(), reload(), reload_as_needed(), remove_init_insns(), remove_some_program_points_and_update_live_ranges(), run_rtl_passes(), setup_live_pseudos_and_spill_after_risky_transforms(), setup_preferred_alternate_classes_for_new_pseudos(), setup_reg_equiv_init(), spill_hard_reg(), and subst_reloads().

◆ max_regno_since_last_resize

int max_regno_since_last_resize

static

Max_reg_num still last resize_reg_info call.

Referenced by allocate_reg_info(), reginfo_init(), and resize_reg_info().

◆ no_global_reg_vars

int no_global_reg_vars = 0

static

No more global register variables may be declared; true once
reginfo has been initialized.

Referenced by globalize_reg(), reginfo_cc_finalize(), and reginfo_init().

◆ reg_class_names

const char* reg_class_names[] = REG_CLASS_NAMES

Array containing all of the register class names.

Referenced by assign_by_spills(), calculate_bb_reg_pressure(), calculate_loop_reg_pressure(), debug_reload_to_stream(), dump_def_use_chain(), dump_reg_info(), find_costs_and_classes(), inherit_reload_reg(), lra_change_class(), lra_create_new_reg_with_unique_value(), print_allocno_costs(), print_loop_title(), print_pseudo_costs(), print_translated_classes(), print_uniform_and_important_classes(), process_alt_operands(), record_reg_classes(), scan_one_insn(), setup_allocno_available_regs_num(), setup_preferred_alternate_classes_for_new_pseudos(), spill_failure(), and split_reg().

◆ reg_info_size

int reg_info_size

static

Current size of reg_info.

Referenced by allocate_reg_info(), reg_allocno_class(), reg_alternate_class(), reg_preferred_class(), reginfo_init(), resize_reg_info(), and setup_reg_classes().

◆ reg_pref

struct reg_pref* reg_pref

static

Record preferences of each pseudo.  This is available after RA is
run.

◆ saved_accessible_reg_set

HARD_REG_SET saved_accessible_reg_set

static

Referenced by restore_register_info(), and save_register_info().

◆ saved_call_used_regs

char saved_call_used_regs[FIRST_PSEUDO_REGISTER]

static

Referenced by restore_register_info(), and save_register_info().

◆ saved_fixed_regs

char saved_fixed_regs[FIRST_PSEUDO_REGISTER]

static

We need to save copies of some of the register information which
can be munged by command-line switches so we can restore it during
subsequent back-end reinitialization.

Referenced by restore_register_info(), and save_register_info().

◆ saved_operand_reg_set

HARD_REG_SET saved_operand_reg_set

static

Referenced by restore_register_info(), and save_register_info().

◆ saved_reg_names

const char* saved_reg_names[FIRST_PSEUDO_REGISTER]

static

Referenced by restore_register_info(), and save_register_info().

◆ valid_mode_changes

HARD_REG_SET** valid_mode_changes

static

Passes for keeping and updating info about modes of registers
inside subregisters.

Referenced by finish_subregs_of_mode(), init_subregs_of_mode(), record_subregs_of_mode(), and valid_mode_changes_for_regno().

◆ valid_mode_changes_obstack

obstack valid_mode_changes_obstack

static

Referenced by finish_subregs_of_mode(), init_subregs_of_mode(), and record_subregs_of_mode().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ call_used_regs

◆ N_REG_INTS

◆ regs_invalidated_by_call

Function Documentation

◆ allocate_reg_info()

◆ choose_hard_reg_mode()

◆ clear_global_regs_cache()

◆ find_subregs_of_mode()

◆ finish_subregs_of_mode()

◆ fix_register()

◆ free_reg_info()

◆ globalize_reg()

◆ init_fake_stack_mems()

◆ init_reg_class_start_regs()

◆ init_reg_modes_target()

◆ init_reg_sets()

◆ init_reg_sets_1()

◆ init_regs()

◆ init_subregs_of_mode()

◆ make_pass_reginfo_init()

◆ memory_move_cost()

◆ memory_move_secondary_cost()

◆ record_subregs_of_mode()

◆ reg_allocno_class()

◆ reg_alternate_class()

◆ reg_class_subset_p()

◆ reg_classes_intersect_p()

◆ reg_preferred_class()

◆ reg_scan()

◆ reg_scan_mark_refs()

◆ reg_set_to_hard_reg_set()

◆ reginfo_cc_finalize()

◆ reginfo_init()

◆ register_move_cost()

◆ reinit_regs()

◆ resize_reg_info()

◆ restore_register_info()

◆ save_register_info()

◆ setup_reg_classes()

◆ simplifiable_subregs()

◆ valid_mode_changes_for_regno()

Variable Documentation

◆ default_target_hard_regs

◆ default_target_regs

◆ global_reg_set

◆ global_regs

◆ global_regs_decl

◆ initial_call_used_regs

◆ initial_fixed_regs

◆ initial_reg_names

◆ int_reg_class_contents

◆ max_regno

◆ max_regno_since_last_resize

◆ no_global_reg_vars

◆ reg_class_names

◆ reg_info_size

◆ reg_pref

◆ saved_accessible_reg_set

◆ saved_call_used_regs

◆ saved_fixed_regs

◆ saved_operand_reg_set

◆ saved_reg_names

◆ valid_mode_changes

◆ valid_mode_changes_obstack