+
/* Perform branch target register load optimizations.
- Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2001-2015 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 2, or (at your option) any later
+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
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "rtl.h"
#include "hard-reg-set.h"
#include "regs.h"
-#include "fibheap.h"
-#include "output.h"
#include "target.h"
-#include "expr.h"
+#include "symtab.h"
+#include "function.h"
#include "flags.h"
+#include "alias.h"
+#include "tree.h"
+#include "insn-config.h"
+#include "expmed.h"
+#include "dojump.h"
+#include "explow.h"
+#include "calls.h"
+#include "emit-rtl.h"
+#include "varasm.h"
+#include "stmt.h"
+#include "expr.h"
#include "insn-attr.h"
-#include "function.h"
#include "except.h"
#include "tm_p.h"
+#include "diagnostic-core.h"
+#include "tree-pass.h"
+#include "recog.h"
+#include "dominance.h"
+#include "cfg.h"
+#include "cfgrtl.h"
+#include "cfganal.h"
+#include "cfgcleanup.h"
+#include "predict.h"
+#include "basic-block.h"
+#include "df.h"
+#include "cfgloop.h"
+#include "rtl-iter.h"
+#include "fibonacci_heap.h"
/* Target register optimizations - these are performed after reload. */
struct btr_user_s *next;
basic_block bb;
int luid;
- rtx insn;
+ rtx_insn *insn;
/* If INSN has a single use of a single branch register, then
USE points to it within INSN. If there is more than
one branch register use, or the use is in some way ambiguous,
struct btr_def_s *next_this_group;
basic_block bb;
int luid;
- rtx insn;
+ rtx_insn *insn;
int btr;
int cost;
/* For a branch register setting insn that has a constant
bitmap live_range;
} *btr_def;
+typedef fibonacci_heap <long, btr_def_s> btr_heap_t;
+typedef fibonacci_node <long, btr_def_s> btr_heap_node_t;
+
static int issue_rate;
-static int basic_block_freq (basic_block);
-static int insn_sets_btr_p (rtx, int, int *);
-static rtx *find_btr_use (rtx);
-static int btr_referenced_p (rtx, rtx *);
-static int find_btr_reference (rtx *, void *);
+static int basic_block_freq (const_basic_block);
+static int insn_sets_btr_p (const rtx_insn *, int, int *);
static void find_btr_def_group (btr_def_group *, btr_def);
-static btr_def add_btr_def (fibheap_t, basic_block, int, rtx,
+static btr_def add_btr_def (btr_heap_t *, basic_block, int, rtx_insn *,
unsigned int, int, btr_def_group *);
-static btr_user new_btr_user (basic_block, int, rtx);
+static btr_user new_btr_user (basic_block, int, rtx_insn *);
static void dump_hard_reg_set (HARD_REG_SET);
static void dump_btrs_live (int);
static void note_other_use_this_block (unsigned int, btr_user);
-static void compute_defs_uses_and_gen (fibheap_t, btr_def *,btr_user *,
+static void compute_defs_uses_and_gen (btr_heap_t *, btr_def *,btr_user *,
sbitmap *, sbitmap *, HARD_REG_SET *);
static void compute_kill (sbitmap *, sbitmap *, HARD_REG_SET *);
static void compute_out (sbitmap *bb_out, sbitmap *, sbitmap *, int);
static void link_btr_uses (btr_def *, btr_user *, sbitmap *, sbitmap *, int);
-static void build_btr_def_use_webs (fibheap_t);
+static void build_btr_def_use_webs (btr_heap_t *);
static int block_at_edge_of_live_range_p (int, btr_def);
static void clear_btr_from_live_range (btr_def def);
static void add_btr_to_live_range (btr_def, int);
static void move_btr_def (basic_block, int, btr_def, bitmap, HARD_REG_SET *);
static int migrate_btr_def (btr_def, int);
static void migrate_btr_defs (enum reg_class, int);
-static int can_move_up (basic_block, rtx, int);
-static void note_btr_set (rtx, rtx, void *);
+static int can_move_up (const_basic_block, const rtx_insn *, int);
+static void note_btr_set (rtx, const_rtx, void *);
\f
/* The following code performs code motion of target load instructions
(instructions that set branch target registers), to move them
/* Return an estimate of the frequency of execution of block bb. */
static int
-basic_block_freq (basic_block bb)
+basic_block_freq (const_basic_block bb)
{
return bb->frequency;
}
-static rtx *btr_reference_found;
-
-/* A subroutine of btr_referenced_p, called through for_each_rtx.
- PREG is a pointer to an rtx that is to be excluded from the
- traversal. If we find a reference to a target register anywhere
- else, return 1, and put a pointer to it into btr_reference_found. */
-static int
-find_btr_reference (rtx *px, void *preg)
-{
- rtx x;
- int regno, i;
-
- if (px == preg)
- return -1;
- x = *px;
- if (!REG_P (x))
- return 0;
- regno = REGNO (x);
- for (i = hard_regno_nregs[regno][GET_MODE (x)] - 1; i >= 0; i--)
- if (TEST_HARD_REG_BIT (all_btrs, regno+i))
- {
- btr_reference_found = px;
- return 1;
- }
- return -1;
-}
-
-/* Return nonzero if X references (sets or reads) any branch target register.
- If EXCLUDEP is set, disregard any references within the rtx pointed to
- by it. If returning nonzero, also set btr_reference_found as above. */
-static int
-btr_referenced_p (rtx x, rtx *excludep)
+/* If X references (sets or reads) any branch target register, return one
+ such register. If EXCLUDEP is set, disregard any references within
+ that location. */
+static rtx *
+find_btr_use (rtx x, rtx *excludep = 0)
{
- return for_each_rtx (&x, find_btr_reference, excludep);
+ subrtx_ptr_iterator::array_type array;
+ FOR_EACH_SUBRTX_PTR (iter, array, &x, NONCONST)
+ {
+ rtx *loc = *iter;
+ if (loc == excludep)
+ iter.skip_subrtxes ();
+ else
+ {
+ const_rtx x = *loc;
+ if (REG_P (x)
+ && overlaps_hard_reg_set_p (all_btrs, GET_MODE (x), REGNO (x)))
+ return loc;
+ }
+ }
+ return 0;
}
/* Return true if insn is an instruction that sets a target register.
If such a set is found and REGNO is nonzero, assign the register number
of the destination register to *REGNO. */
static int
-insn_sets_btr_p (rtx insn, int check_const, int *regno)
+insn_sets_btr_p (const rtx_insn *insn, int check_const, int *regno)
{
rtx set;
if (REG_P (dest)
&& TEST_HARD_REG_BIT (all_btrs, REGNO (dest)))
{
- gcc_assert (!btr_referenced_p (src, NULL));
-
+ gcc_assert (!find_btr_use (src));
+
if (!check_const || CONSTANT_P (src))
{
if (regno)
return 0;
}
-/* Find and return a use of a target register within an instruction INSN. */
-static rtx *
-find_btr_use (rtx insn)
-{
- return btr_referenced_p (insn, NULL) ? btr_reference_found : NULL;
-}
-
/* Find the group that the target register definition DEF belongs
to in the list starting with *ALL_BTR_DEF_GROUPS. If no such
group exists, create one. Add def to the group. */
if (!this_group)
{
- this_group = obstack_alloc (&migrate_btrl_obstack,
- sizeof (struct btr_def_group_s));
+ this_group = XOBNEW (&migrate_btrl_obstack, struct btr_def_group_s);
this_group->src = def_src;
this_group->members = NULL;
this_group->next = *all_btr_def_groups;
block BB, instruction INSN, and insert it into ALL_BTR_DEFS. Return
the new definition. */
static btr_def
-add_btr_def (fibheap_t all_btr_defs, basic_block bb, int insn_luid, rtx insn,
+add_btr_def (btr_heap_t *all_btr_defs, basic_block bb, int insn_luid,
+ rtx_insn *insn,
unsigned int dest_reg, int other_btr_uses_before_def,
btr_def_group *all_btr_def_groups)
{
- btr_def this
- = obstack_alloc (&migrate_btrl_obstack, sizeof (struct btr_def_s));
- this->bb = bb;
- this->luid = insn_luid;
- this->insn = insn;
- this->btr = dest_reg;
- this->cost = basic_block_freq (bb);
- this->has_ambiguous_use = 0;
- this->other_btr_uses_before_def = other_btr_uses_before_def;
- this->other_btr_uses_after_use = 0;
- this->next_this_bb = NULL;
- this->next_this_group = NULL;
- this->uses = NULL;
- this->live_range = NULL;
- find_btr_def_group (all_btr_def_groups, this);
-
- fibheap_insert (all_btr_defs, -this->cost, this);
+ btr_def this_def = XOBNEW (&migrate_btrl_obstack, struct btr_def_s);
+ this_def->bb = bb;
+ this_def->luid = insn_luid;
+ this_def->insn = insn;
+ this_def->btr = dest_reg;
+ this_def->cost = basic_block_freq (bb);
+ this_def->has_ambiguous_use = 0;
+ this_def->other_btr_uses_before_def = other_btr_uses_before_def;
+ this_def->other_btr_uses_after_use = 0;
+ this_def->next_this_bb = NULL;
+ this_def->next_this_group = NULL;
+ this_def->uses = NULL;
+ this_def->live_range = NULL;
+ find_btr_def_group (all_btr_def_groups, this_def);
+
+ all_btr_defs->insert (-this_def->cost, this_def);
if (dump_file)
fprintf (dump_file,
"Found target reg definition: sets %u { bb %d, insn %d }%s priority %d\n",
- dest_reg, bb->index, INSN_UID (insn), (this->group ? "" : ":not const"),
- this->cost);
+ dest_reg, bb->index, INSN_UID (insn),
+ (this_def->group ? "" : ":not const"), this_def->cost);
- return this;
+ return this_def;
}
/* Create a new target register user structure, for a use in block BB,
instruction INSN. Return the new user. */
static btr_user
-new_btr_user (basic_block bb, int insn_luid, rtx insn)
+new_btr_user (basic_block bb, int insn_luid, rtx_insn *insn)
{
/* This instruction reads target registers. We need
to decide whether we can replace all target register
/* We want to ensure that USE is the only use of a target
register in INSN, so that we know that to rewrite INSN to use
a different target register, all we have to do is replace USE. */
- unambiguous_single_use = !btr_referenced_p (PATTERN (insn), usep);
+ unambiguous_single_use = !find_btr_use (PATTERN (insn), usep);
if (!unambiguous_single_use)
usep = NULL;
}
use = usep ? *usep : NULL_RTX;
- user = obstack_alloc (&migrate_btrl_obstack, sizeof (struct btr_user_s));
+ user = XOBNEW (&migrate_btrl_obstack, struct btr_user_s);
user->bb = bb;
user->luid = insn_luid;
user->insn = insn;
straightforward definitions. DATA points to information about the
current basic block that needs updating. */
static void
-note_btr_set (rtx dest, rtx set ATTRIBUTE_UNUSED, void *data)
+note_btr_set (rtx dest, const_rtx set ATTRIBUTE_UNUSED, void *data)
{
- defs_uses_info *info = data;
+ defs_uses_info *info = (defs_uses_info *) data;
int regno, end_regno;
if (!REG_P (dest))
return;
regno = REGNO (dest);
- end_regno = regno + hard_regno_nregs[regno][GET_MODE (dest)];
+ end_regno = END_REGNO (dest);
for (; regno < end_regno; regno++)
if (TEST_HARD_REG_BIT (all_btrs, regno))
{
note_other_use_this_block (regno, info->users_this_bb);
SET_HARD_REG_BIT (info->btrs_written_in_block, regno);
SET_HARD_REG_BIT (info->btrs_live_in_block, regno);
- sbitmap_difference (info->bb_gen, info->bb_gen,
+ bitmap_and_compl (info->bb_gen, info->bb_gen,
info->btr_defset[regno - first_btr]);
}
}
static void
-compute_defs_uses_and_gen (fibheap_t all_btr_defs, btr_def *def_array,
+compute_defs_uses_and_gen (btr_heap_t *all_btr_defs, btr_def *def_array,
btr_user *use_array, sbitmap *btr_defset,
sbitmap *bb_gen, HARD_REG_SET *btrs_written)
{
btr_def_group all_btr_def_groups = NULL;
defs_uses_info info;
- sbitmap_vector_zero (bb_gen, n_basic_blocks);
- for (i = 0; i < n_basic_blocks; i++)
+ bitmap_vector_clear (bb_gen, last_basic_block_for_fn (cfun));
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block_for_fn (cfun); i++)
{
- basic_block bb = BASIC_BLOCK (i);
+ basic_block bb = BASIC_BLOCK_FOR_FN (cfun, i);
int reg;
btr_def defs_this_bb = NULL;
- rtx insn;
- rtx last;
+ rtx_insn *insn;
+ rtx_insn *last;
int can_throw = 0;
info.users_this_bb = NULL;
CLEAR_HARD_REG_SET (info.btrs_written_in_block);
for (reg = first_btr; reg <= last_btr; reg++)
if (TEST_HARD_REG_BIT (all_btrs, reg)
- && REGNO_REG_SET_P (bb->global_live_at_start, reg))
+ && REGNO_REG_SET_P (df_get_live_in (bb), reg))
SET_HARD_REG_BIT (info.btrs_live_in_block, reg);
for (insn = BB_HEAD (bb), last = NEXT_INSN (BB_END (bb));
def_array[insn_uid] = def;
SET_HARD_REG_BIT (info.btrs_written_in_block, regno);
SET_HARD_REG_BIT (info.btrs_live_in_block, regno);
- sbitmap_difference (bb_gen[i], bb_gen[i],
+ bitmap_and_compl (bb_gen[i], bb_gen[i],
btr_defset[regno - first_btr]);
- SET_BIT (bb_gen[i], insn_uid);
+ bitmap_set_bit (bb_gen[i], insn_uid);
def->next_this_bb = defs_this_bb;
defs_this_bb = def;
- SET_BIT (btr_defset[regno - first_btr], insn_uid);
+ bitmap_set_bit (btr_defset[regno - first_btr], insn_uid);
note_other_use_this_block (regno, info.users_this_bb);
}
+ /* Check for the blockage emitted by expand_nl_goto_receiver. */
+ else if (cfun->has_nonlocal_label
+ && GET_CODE (PATTERN (insn)) == UNSPEC_VOLATILE)
+ {
+ btr_user user;
+
+ /* Do the equivalent of calling note_other_use_this_block
+ for every target register. */
+ for (user = info.users_this_bb; user != NULL;
+ user = user->next)
+ if (user->use)
+ user->other_use_this_block = 1;
+ IOR_HARD_REG_SET (info.btrs_written_in_block, all_btrs);
+ IOR_HARD_REG_SET (info.btrs_live_in_block, all_btrs);
+ bitmap_clear (info.bb_gen);
+ }
else
{
- if (btr_referenced_p (PATTERN (insn), NULL))
+ if (find_btr_use (PATTERN (insn)))
{
btr_user user = new_btr_user (bb, insn_luid, insn);
int reg;
for (reg = first_btr; reg <= last_btr; reg++)
if (TEST_HARD_REG_BIT (all_btrs, reg)
- && refers_to_regno_p (reg, reg + 1, user->insn,
- NULL))
+ && refers_to_regno_p (reg, user->insn))
{
note_other_use_this_block (reg,
info.users_this_bb);
/* Check for sibcall. */
if (GET_CODE (pat) == PARALLEL)
for (i = XVECLEN (pat, 0) - 1; i >= 0; i--)
- if (GET_CODE (XVECEXP (pat, 0, i)) == RETURN)
+ if (ANY_RETURN_P (XVECEXP (pat, 0, i)))
{
COMPL_HARD_REG_SET (call_saved,
call_used_reg_set);
COPY_HARD_REG_SET (btrs_live[i], info.btrs_live_in_block);
COPY_HARD_REG_SET (btrs_written[i], info.btrs_written_in_block);
- REG_SET_TO_HARD_REG_SET (btrs_live_at_end[i], bb->global_live_at_end);
+ REG_SET_TO_HARD_REG_SET (btrs_live_at_end[i], df_get_live_out (bb));
/* If this block ends in a jump insn, add any uses or even clobbers
of branch target registers that it might have. */
for (insn = BB_END (bb); insn != BB_HEAD (bb) && ! INSN_P (insn); )
int regno;
for (regno = first_btr; regno <= last_btr; regno++)
- if (refers_to_regno_p (regno, regno+1, insn, NULL))
+ if (refers_to_regno_p (regno, insn))
SET_HARD_REG_BIT (btrs_live_at_end[i], regno);
}
if (dump_file)
- dump_btrs_live(i);
+ dump_btrs_live (i);
}
}
/* For each basic block, form the set BB_KILL - the set
of definitions that the block kills. */
- sbitmap_vector_zero (bb_kill, n_basic_blocks);
- for (i = 0; i < n_basic_blocks; i++)
+ bitmap_vector_clear (bb_kill, last_basic_block_for_fn (cfun));
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block_for_fn (cfun); i++)
{
for (regno = first_btr; regno <= last_btr; regno++)
if (TEST_HARD_REG_BIT (all_btrs, regno)
&& TEST_HARD_REG_BIT (btrs_written[i], regno))
- sbitmap_a_or_b (bb_kill[i], bb_kill[i],
+ bitmap_ior (bb_kill[i], bb_kill[i],
btr_defset[regno - first_btr]);
}
}
int changed;
sbitmap bb_in = sbitmap_alloc (max_uid);
- for (i = 0; i < n_basic_blocks; i++)
- sbitmap_copy (bb_out[i], bb_gen[i]);
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block_for_fn (cfun); i++)
+ bitmap_copy (bb_out[i], bb_gen[i]);
changed = 1;
while (changed)
{
changed = 0;
- for (i = 0; i < n_basic_blocks; i++)
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block_for_fn (cfun); i++)
{
- sbitmap_union_of_preds (bb_in, bb_out, i);
- changed |= sbitmap_union_of_diff_cg (bb_out[i], bb_gen[i],
+ bitmap_union_of_preds (bb_in, bb_out, BASIC_BLOCK_FOR_FN (cfun, i));
+ changed |= bitmap_ior_and_compl (bb_out[i], bb_gen[i],
bb_in, bb_kill[i]);
}
}
/* Link uses to the uses lists of all of their reaching defs.
Count up the number of reaching defs of each use. */
- for (i = 0; i < n_basic_blocks; i++)
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block_for_fn (cfun); i++)
{
- basic_block bb = BASIC_BLOCK (i);
- rtx insn;
- rtx last;
+ basic_block bb = BASIC_BLOCK_FOR_FN (cfun, i);
+ rtx_insn *insn;
+ rtx_insn *last;
- sbitmap_union_of_preds (reaching_defs, bb_out, i);
+ bitmap_union_of_preds (reaching_defs, bb_out, BASIC_BLOCK_FOR_FN (cfun, i));
for (insn = BB_HEAD (bb), last = NEXT_INSN (BB_END (bb));
insn != last;
insn = NEXT_INSN (insn))
{
/* Remove all reaching defs of regno except
for this one. */
- sbitmap_difference (reaching_defs, reaching_defs,
+ bitmap_and_compl (reaching_defs, reaching_defs,
btr_defset[def->btr - first_btr]);
- SET_BIT(reaching_defs, insn_uid);
+ bitmap_set_bit (reaching_defs, insn_uid);
}
if (user != NULL)
{
/* Find all the reaching defs for this use. */
- sbitmap reaching_defs_of_reg = sbitmap_alloc(max_uid);
- int uid;
+ sbitmap reaching_defs_of_reg = sbitmap_alloc (max_uid);
+ unsigned int uid = 0;
+ sbitmap_iterator sbi;
if (user->use)
- sbitmap_a_and_b (
+ bitmap_and (
reaching_defs_of_reg,
reaching_defs,
btr_defset[REGNO (user->use) - first_btr]);
{
int reg;
- sbitmap_zero (reaching_defs_of_reg);
+ bitmap_clear (reaching_defs_of_reg);
for (reg = first_btr; reg <= last_btr; reg++)
if (TEST_HARD_REG_BIT (all_btrs, reg)
- && refers_to_regno_p (reg, reg + 1, user->insn,
- NULL))
- sbitmap_a_or_b_and_c (reaching_defs_of_reg,
+ && refers_to_regno_p (reg, user->insn))
+ bitmap_or_and (reaching_defs_of_reg,
reaching_defs_of_reg,
reaching_defs,
btr_defset[reg - first_btr]);
}
- EXECUTE_IF_SET_IN_SBITMAP (reaching_defs_of_reg, 0, uid,
+ EXECUTE_IF_SET_IN_BITMAP (reaching_defs_of_reg, 0, uid, sbi)
{
btr_def def = def_array[uid];
def->other_btr_uses_after_use = 1;
user->next = def->uses;
def->uses = user;
- });
+ }
sbitmap_free (reaching_defs_of_reg);
}
for (regno = first_btr; regno <= last_btr; regno++)
if (TEST_HARD_REG_BIT (all_btrs, regno)
&& TEST_HARD_REG_BIT (call_used_reg_set, regno))
- sbitmap_difference (reaching_defs, reaching_defs,
+ bitmap_and_compl (reaching_defs, reaching_defs,
btr_defset[regno - first_btr]);
}
}
}
static void
-build_btr_def_use_webs (fibheap_t all_btr_defs)
+build_btr_def_use_webs (btr_heap_t *all_btr_defs)
{
const int max_uid = get_max_uid ();
- btr_def *def_array = xcalloc (max_uid, sizeof (btr_def));
- btr_user *use_array = xcalloc (max_uid, sizeof (btr_user));
+ btr_def *def_array = XCNEWVEC (btr_def, max_uid);
+ btr_user *use_array = XCNEWVEC (btr_user, max_uid);
sbitmap *btr_defset = sbitmap_vector_alloc (
(last_btr - first_btr) + 1, max_uid);
- sbitmap *bb_gen = sbitmap_vector_alloc (n_basic_blocks, max_uid);
- HARD_REG_SET *btrs_written = xcalloc (n_basic_blocks, sizeof (HARD_REG_SET));
+ sbitmap *bb_gen = sbitmap_vector_alloc (last_basic_block_for_fn (cfun),
+ max_uid);
+ HARD_REG_SET *btrs_written = XCNEWVEC (HARD_REG_SET,
+ last_basic_block_for_fn (cfun));
sbitmap *bb_kill;
sbitmap *bb_out;
- sbitmap_vector_zero (btr_defset, (last_btr - first_btr) + 1);
+ bitmap_vector_clear (btr_defset, (last_btr - first_btr) + 1);
compute_defs_uses_and_gen (all_btr_defs, def_array, use_array, btr_defset,
bb_gen, btrs_written);
- bb_kill = sbitmap_vector_alloc (n_basic_blocks, max_uid);
+ bb_kill = sbitmap_vector_alloc (last_basic_block_for_fn (cfun), max_uid);
compute_kill (bb_kill, btr_defset, btrs_written);
free (btrs_written);
- bb_out = sbitmap_vector_alloc (n_basic_blocks, max_uid);
+ bb_out = sbitmap_vector_alloc (last_basic_block_for_fn (cfun), max_uid);
compute_out (bb_out, bb_gen, bb_kill, max_uid);
sbitmap_vector_free (bb_gen);
static int
block_at_edge_of_live_range_p (int bb, btr_def def)
{
- if (def->other_btr_uses_before_def && BASIC_BLOCK (bb) == def->bb)
+ if (def->other_btr_uses_before_def
+ && BASIC_BLOCK_FOR_FN (cfun, bb) == def->bb)
return 1;
else if (def->other_btr_uses_after_use)
{
btr_user user;
for (user = def->uses; user != NULL; user = user->next)
- if (BASIC_BLOCK (bb) == user->bb)
+ if (BASIC_BLOCK_FOR_FN (cfun, bb) == user->bb)
return 1;
}
return 0;
{
basic_block *worklist, *tos;
- tos = worklist = xmalloc (sizeof (basic_block) * (n_basic_blocks + 1));
+ tos = worklist = XNEWVEC (basic_block, n_basic_blocks_for_fn (cfun) + 1);
if (dominated_by_p (CDI_DOMINATORS, new_bb, head_bb))
{
{
if (full_range)
IOR_HARD_REG_SET (*btrs_live_in_range, btrs_live[new_bb->index]);
+ free (tos);
return;
}
*tos++ = new_bb;
int new_block = new_bb->index;
gcc_assert (dominated_by_p (CDI_DOMINATORS, head_bb, new_bb));
-
+
IOR_HARD_REG_SET (*btrs_live_in_range, btrs_live[head_bb->index]);
bitmap_set_bit (live_range, new_block);
/* A previous btr migration could have caused a register to be
- live just at the end of new_block which we need in full, so
- use trs_live_at_end even if full_range is set. */
+ live just at the end of new_block which we need in full, so
+ use trs_live_at_end even if full_range is set. */
IOR_HARD_REG_SET (*btrs_live_in_range, btrs_live_at_end[new_block]);
if (full_range)
IOR_HARD_REG_SET (*btrs_live_in_range, btrs_live[new_block]);
choose_btr (HARD_REG_SET used_btrs)
{
int i;
- GO_IF_HARD_REG_SUBSET (all_btrs, used_btrs, give_up);
- for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- {
+ if (!hard_reg_set_subset_p (all_btrs, used_btrs))
+ for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
+ {
#ifdef REG_ALLOC_ORDER
- int regno = reg_alloc_order[i];
+ int regno = reg_alloc_order[i];
#else
- int regno = i;
+ int regno = i;
#endif
- if (TEST_HARD_REG_BIT (all_btrs, regno)
- && !TEST_HARD_REG_BIT (used_btrs, regno))
- return regno;
- }
-give_up:
+ if (TEST_HARD_REG_BIT (all_btrs, regno)
+ && !TEST_HARD_REG_BIT (used_btrs, regno))
+ return regno;
+ }
return -1;
}
{
btr_user user;
- def->live_range = BITMAP_XMALLOC ();
+ def->live_range = BITMAP_ALLOC (NULL);
bitmap_set_bit (def->live_range, def->bb->index);
COPY_HARD_REG_SET (*btrs_live_in_range,
def->bb, user->bb,
(flag_btr_bb_exclusive
|| user->insn != BB_END (def->bb)
- || GET_CODE (user->insn) != JUMP_INSN));
+ || !JUMP_P (user->insn)));
}
else
{
target registers live over the merged range. */
int btr;
HARD_REG_SET combined_btrs_live;
- bitmap combined_live_range = BITMAP_XMALLOC ();
+ bitmap combined_live_range = BITMAP_ALLOC (NULL);
btr_user user;
if (other_def->live_range == NULL)
def->bb, user->bb,
(flag_btr_bb_exclusive
|| user->insn != BB_END (def->bb)
- || GET_CODE (user->insn) != JUMP_INSN));
+ || !JUMP_P (user->insn)));
btr = choose_btr (combined_btrs_live);
if (btr != -1)
delete_insn (other_def->insn);
}
- BITMAP_XFREE (combined_live_range);
+ BITMAP_FREE (combined_live_range);
}
}
}
Replace all uses of the old target register definition by
uses of the new definition. Delete the old definition. */
basic_block b = new_def_bb;
- rtx insp = BB_HEAD (b);
- rtx old_insn = def->insn;
+ rtx_insn *insp = BB_HEAD (b);
+ rtx_insn *old_insn = def->insn;
rtx src;
rtx btr_rtx;
- rtx new_insn;
- enum machine_mode btr_mode;
+ rtx_insn *new_insn;
+ machine_mode btr_mode;
btr_user user;
rtx set;
insp = BB_END (b);
for (insp = BB_END (b); ! INSN_P (insp); insp = PREV_INSN (insp))
gcc_assert (insp != BB_HEAD (b));
-
+
if (JUMP_P (insp) || can_throw_internal (insp))
insp = PREV_INSN (insp);
}
/* Insert target register initialization at head of basic block. */
def->insn = emit_insn_after (new_insn, insp);
- regs_ever_live[btr] = 1;
+ df_set_regs_ever_live (btr, true);
if (dump_file)
fprintf (dump_file, "New pt is insn %d, inserted after insn %d\n",
replacement_rtx = btr_rtx;
else
replacement_rtx = gen_rtx_REG (GET_MODE (user->use), btr);
- replace_rtx (user->insn, user->use, replacement_rtx);
+ validate_replace_rtx (user->use, replacement_rtx, user->insn);
user->use = replacement_rtx;
}
}
/* We anticipate intra-block scheduling to be done. See if INSN could move
up within BB by N_INSNS. */
static int
-can_move_up (basic_block bb, rtx insn, int n_insns)
+can_move_up (const_basic_block bb, const rtx_insn *insn, int n_insns)
{
while (insn != BB_HEAD (bb) && n_insns > 0)
{
HARD_REG_SET btrs_live_in_range;
int btr_used_near_def = 0;
int def_basic_block_freq;
- basic_block try;
+ basic_block attempt;
int give_up = 0;
int def_moved = 0;
btr_user user;
}
btr_def_live_range (def, &btrs_live_in_range);
- live_range = BITMAP_XMALLOC ();
+ live_range = BITMAP_ALLOC (NULL);
bitmap_copy (live_range, def->live_range);
#ifdef INSN_SCHEDULING
def_basic_block_freq = basic_block_freq (def->bb);
- for (try = get_immediate_dominator (CDI_DOMINATORS, def->bb);
- !give_up && try && try != ENTRY_BLOCK_PTR && def->cost >= min_cost;
- try = get_immediate_dominator (CDI_DOMINATORS, try))
+ for (attempt = get_immediate_dominator (CDI_DOMINATORS, def->bb);
+ !give_up && attempt && attempt != ENTRY_BLOCK_PTR_FOR_FN (cfun)
+ && def->cost >= min_cost;
+ attempt = get_immediate_dominator (CDI_DOMINATORS, attempt))
{
/* Try to move the instruction that sets the target register into
- basic block TRY. */
- int try_freq = basic_block_freq (try);
+ basic block ATTEMPT. */
+ int try_freq = basic_block_freq (attempt);
+ edge_iterator ei;
+ edge e;
+
+ /* If ATTEMPT has abnormal edges, skip it. */
+ FOR_EACH_EDGE (e, ei, attempt->succs)
+ if (e->flags & EDGE_COMPLEX)
+ break;
+ if (e)
+ continue;
if (dump_file)
- fprintf (dump_file, "trying block %d ...", try->index);
+ fprintf (dump_file, "trying block %d ...", attempt->index);
if (try_freq < def_basic_block_freq
|| (try_freq == def_basic_block_freq && btr_used_near_def))
{
int btr;
- augment_live_range (live_range, &btrs_live_in_range, def->bb, try,
+ augment_live_range (live_range, &btrs_live_in_range, def->bb, attempt,
flag_btr_bb_exclusive);
if (dump_file)
{
btr = choose_btr (btrs_live_in_range);
if (btr != -1)
{
- move_btr_def (try, btr, def, live_range, &btrs_live_in_range);
- bitmap_copy(live_range, def->live_range);
+ move_btr_def (attempt, btr, def, live_range, &btrs_live_in_range);
+ bitmap_copy (live_range, def->live_range);
btr_used_near_def = 0;
def_moved = 1;
def_basic_block_freq = basic_block_freq (def->bb);
if (dump_file)
fprintf (dump_file, "failed to move\n");
}
- BITMAP_XFREE (live_range);
+ BITMAP_FREE (live_range);
return !give_up;
}
static void
migrate_btr_defs (enum reg_class btr_class, int allow_callee_save)
{
- fibheap_t all_btr_defs = fibheap_new ();
+ btr_heap_t all_btr_defs (LONG_MIN);
int reg;
gcc_obstack_init (&migrate_btrl_obstack);
{
int i;
- for (i = 0; i < n_basic_blocks; i++)
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block_for_fn (cfun); i++)
{
- basic_block bb = BASIC_BLOCK (i);
- fprintf(dump_file,
- "Basic block %d: count = " HOST_WIDEST_INT_PRINT_DEC
- " loop-depth = %d idom = %d\n",
- i, (HOST_WIDEST_INT) bb->count, bb->loop_depth,
- get_immediate_dominator (CDI_DOMINATORS, bb)->index);
+ basic_block bb = BASIC_BLOCK_FOR_FN (cfun, i);
+ fprintf (dump_file,
+ "Basic block %d: count = %" PRId64
+ " loop-depth = %d idom = %d\n",
+ i, (int64_t) bb->count, bb_loop_depth (bb),
+ get_immediate_dominator (CDI_DOMINATORS, bb)->index);
}
}
CLEAR_HARD_REG_SET (all_btrs);
for (first_btr = -1, reg = 0; reg < FIRST_PSEUDO_REGISTER; reg++)
if (TEST_HARD_REG_BIT (reg_class_contents[(int) btr_class], reg)
- && (allow_callee_save || call_used_regs[reg] || regs_ever_live[reg]))
+ && (allow_callee_save || call_used_regs[reg]
+ || df_regs_ever_live_p (reg)))
{
SET_HARD_REG_BIT (all_btrs, reg);
last_btr = reg;
first_btr = reg;
}
- btrs_live = xcalloc (n_basic_blocks, sizeof (HARD_REG_SET));
- btrs_live_at_end = xcalloc (n_basic_blocks, sizeof (HARD_REG_SET));
+ btrs_live = XCNEWVEC (HARD_REG_SET, last_basic_block_for_fn (cfun));
+ btrs_live_at_end = XCNEWVEC (HARD_REG_SET, last_basic_block_for_fn (cfun));
- build_btr_def_use_webs (all_btr_defs);
+ build_btr_def_use_webs (&all_btr_defs);
- while (!fibheap_empty (all_btr_defs))
+ while (!all_btr_defs.empty ())
{
- btr_def def = fibheap_extract_min (all_btr_defs);
- int min_cost = -fibheap_min_key (all_btr_defs);
+ int min_cost = -all_btr_defs.min_key ();
+ btr_def def = all_btr_defs.extract_min ();
if (migrate_btr_def (def, min_cost))
{
- fibheap_insert (all_btr_defs, -def->cost, (void *) def);
+ all_btr_defs.insert (-def->cost, def);
if (dump_file)
{
fprintf (dump_file,
}
}
else
- BITMAP_XFREE (def->live_range);
+ BITMAP_FREE (def->live_range);
}
free (btrs_live);
free (btrs_live_at_end);
obstack_free (&migrate_btrl_obstack, NULL);
- fibheap_delete (all_btr_defs);
}
-void
+static void
branch_target_load_optimize (bool after_prologue_epilogue_gen)
{
- enum reg_class class = targetm.branch_target_register_class ();
- if (class != NO_REGS)
+ enum reg_class klass
+ = (enum reg_class) targetm.branch_target_register_class ();
+ if (klass != NO_REGS)
{
/* Initialize issue_rate. */
if (targetm.sched.issue_rate)
else
issue_rate = 1;
- /* Build the CFG for migrate_btr_defs. */
+ if (!after_prologue_epilogue_gen)
+ {
+ /* Build the CFG for migrate_btr_defs. */
#if 1
- /* This may or may not be needed, depending on where we
- run this phase. */
- cleanup_cfg (optimize ? CLEANUP_EXPENSIVE : 0);
+ /* This may or may not be needed, depending on where we
+ run this phase. */
+ cleanup_cfg (optimize ? CLEANUP_EXPENSIVE : 0);
#endif
+ }
+ df_analyze ();
- life_analysis (NULL, 0);
/* Dominator info is also needed for migrate_btr_def. */
calculate_dominance_info (CDI_DOMINATORS);
- migrate_btr_defs (class,
+ migrate_btr_defs (klass,
(targetm.branch_target_register_callee_saved
(after_prologue_epilogue_gen)));
free_dominance_info (CDI_DOMINATORS);
+ }
+}
+\f
+namespace {
- update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES,
- PROP_DEATH_NOTES | PROP_REG_INFO);
+const pass_data pass_data_branch_target_load_optimize1 =
+{
+ RTL_PASS, /* type */
+ "btl1", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_NONE, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+};
+
+class pass_branch_target_load_optimize1 : public rtl_opt_pass
+{
+public:
+ pass_branch_target_load_optimize1 (gcc::context *ctxt)
+ : rtl_opt_pass (pass_data_branch_target_load_optimize1, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ virtual bool gate (function *) { return flag_branch_target_load_optimize; }
+ virtual unsigned int execute (function *)
+ {
+ branch_target_load_optimize (epilogue_completed);
+ return 0;
}
+
+}; // class pass_branch_target_load_optimize1
+
+} // anon namespace
+
+rtl_opt_pass *
+make_pass_branch_target_load_optimize1 (gcc::context *ctxt)
+{
+ return new pass_branch_target_load_optimize1 (ctxt);
+}
+
+
+namespace {
+
+const pass_data pass_data_branch_target_load_optimize2 =
+{
+ RTL_PASS, /* type */
+ "btl2", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_NONE, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+};
+
+class pass_branch_target_load_optimize2 : public rtl_opt_pass
+{
+public:
+ pass_branch_target_load_optimize2 (gcc::context *ctxt)
+ : rtl_opt_pass (pass_data_branch_target_load_optimize2, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ virtual bool gate (function *)
+ {
+ return (optimize > 0 && flag_branch_target_load_optimize2);
+ }
+
+ virtual unsigned int execute (function *);
+
+}; // class pass_branch_target_load_optimize2
+
+unsigned int
+pass_branch_target_load_optimize2::execute (function *)
+{
+ static int warned = 0;
+
+ /* Leave this a warning for now so that it is possible to experiment
+ with running this pass twice. In 3.6, we should either make this
+ an error, or use separate dump files. */
+ if (flag_branch_target_load_optimize
+ && flag_branch_target_load_optimize2
+ && !warned)
+ {
+ warning (0, "branch target register load optimization is not intended "
+ "to be run twice");
+
+ warned = 1;
+ }
+
+ branch_target_load_optimize (epilogue_completed);
+ return 0;
+}
+
+} // anon namespace
+
+rtl_opt_pass *
+make_pass_branch_target_load_optimize2 (gcc::context *ctxt)
+{
+ return new pass_branch_target_load_optimize2 (ctxt);
}
projects / gcc.git / blobdiff