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df-scan.c (problem_SCAN): Added NULL reset function.

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2005-01-21  Kenneth Zadeck <zadeck@naturalbridge.com>

	* df-scan.c (problem_SCAN): Added NULL reset function.
	(df_scan_reset_blocks): Added code to call reset block function
	(df_bb_refs_delete) Fixed comment.
	(df_insn_refs_delete): Made tolerant of deleting non existent info
	for dataflow problems that need to be reset.
	* df-core.c (df_set_blocks): Ditto.
	* df.h (struct df_problem): Added reset_fun.
	* df-problems.c (problem_RU, problem_RD, problem_LR, problem_UR,
	problem_UREC, problem_CHAIN, problem_RI): Initialized reset_fun field.
	(df_chain_insn_reset, df_chain_bb_reset, df_chain_reset): New
	functions to clear out all references to def-use or use-def chains.

From-SVN: r110066
This commit is contained in:
Kenneth Zadeck 2006-01-21 14:58:40 +00:00 committed by Kenneth Zadeck
parent 68ea355b5d
commit 30cb87a09b
5 changed files with 209 additions and 7 deletions
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14
gcc/ChangeLog
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@ -1,3 +1,17 @@
2005-01-21 Kenneth Zadeck <zadeck@naturalbridge.com>
* df-scan.c (problem_SCAN): Added NULL reset function.
(df_scan_reset_blocks): Added code to call reset block function
(df_bb_refs_delete) Fixed comment.
(df_insn_refs_delete): Made tolerant of deleting non existent info
for dataflow problems that need to be reset.
* df-core.c (df_set_blocks): Ditto.
* df.h (struct df_problem): Added reset_fun.
* df-problems.c (problem_RU, problem_RD, problem_LR, problem_UR,
problem_UREC, problem_CHAIN, problem_RI): Initialized reset_fun field.
(df_chain_insn_reset, df_chain_bb_reset, df_chain_reset): New
functions to clear out all references to def-use or use-def chains.
2006-01-21 Ben Elliston <bje@au.ibm.com>
* varasm.c (assemble_real): Initialise data array.

46
gcc/df-core.c
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@ -292,6 +292,8 @@ are write-only operations.
static struct df *ddf = NULL;
struct df *shared_df = NULL;
static void * df_get_bb_info (struct dataflow *, unsigned int);
static void df_set_bb_info (struct dataflow *, unsigned int, void *);
/*----------------------------------------------------------------------------
Functions to create, destroy and manipulate an instance of df.
----------------------------------------------------------------------------*/
@ -358,11 +360,14 @@ df_set_blocks (struct df *df, bitmap blocks)
{
int p;
bitmap diff = BITMAP_ALLOC (NULL);
bitmap all = BITMAP_ALLOC (NULL);
bitmap_and_compl (diff, df->blocks_to_analyze, blocks);
for (p = 0; p < df->num_problems_defined; p++)
for (p = df->num_problems_defined - 1; p >= 0 ;p--)
{
struct dataflow *dflow = df->problems_in_order[p];
if (*dflow->problem->free_bb_fun)
if (*dflow->problem->reset_fun)
(*dflow->problem->reset_fun) (dflow, df->blocks_to_analyze);
else if (*dflow->problem->free_bb_fun)
{
bitmap_iterator bi;
unsigned int bb_index;
@ -370,15 +375,50 @@ df_set_blocks (struct df *df, bitmap blocks)
EXECUTE_IF_SET_IN_BITMAP (diff, 0, bb_index, bi)
{
basic_block bb = BASIC_BLOCK (bb_index);
(*dflow->problem->free_bb_fun) (dflow, bb, diff);
if (bb)
{
(*dflow->problem->free_bb_fun)
(dflow, bb, df_get_bb_info (dflow, bb_index));
df_set_bb_info (dflow, bb_index, NULL);
}
}
}
}
BITMAP_FREE (all);
BITMAP_FREE (diff);
}
else
{
/* If we have not actually run scanning before, do not try
to clear anything. */
struct dataflow *scan_dflow = df->problems_by_index [DF_SCAN];
if (scan_dflow->problem_data)
{
bitmap blocks_to_reset = NULL;
int p;
for (p = df->num_problems_defined - 1; p >= 0 ;p--)
{
struct dataflow *dflow = df->problems_in_order[p];
if (*dflow->problem->reset_fun)
{
if (!blocks_to_reset)
{
basic_block bb;
blocks_to_reset = BITMAP_ALLOC (NULL);
FOR_ALL_BB(bb)
{
bitmap_set_bit (blocks_to_reset, bb->index);
}
}
(*dflow->problem->reset_fun) (dflow, blocks_to_reset);
}
}
if (blocks_to_reset)
BITMAP_FREE (blocks_to_reset);
}
df->blocks_to_analyze = BITMAP_ALLOC (NULL);
}
bitmap_copy (df->blocks_to_analyze, blocks);
}
else

115
gcc/df-problems.c
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@ -777,6 +777,7 @@ static struct df_problem problem_RU =
DF_RU, /* Problem id. */
DF_BACKWARD, /* Direction. */
df_ru_alloc, /* Allocate the problem specific data. */
NULL, /* Reset global information. */
df_ru_free_bb_info, /* Free basic block info. */
df_ru_local_compute, /* Local compute function. */
df_ru_init_solution, /* Init the solution specific data. */
@ -1269,6 +1270,7 @@ static struct df_problem problem_RD =
DF_RD, /* Problem id. */
DF_FORWARD, /* Direction. */
df_rd_alloc, /* Allocate the problem specific data. */
NULL, /* Reset global information. */
df_rd_free_bb_info, /* Free basic block info. */
df_rd_local_compute, /* Local compute function. */
df_rd_init_solution, /* Init the solution specific data. */
@ -1655,6 +1657,7 @@ static struct df_problem problem_LR =
DF_LR, /* Problem id. */
DF_BACKWARD, /* Direction. */
df_lr_alloc, /* Allocate the problem specific data. */
NULL, /* Reset global information. */
df_lr_free_bb_info, /* Free basic block info. */
df_lr_local_compute, /* Local compute function. */
df_lr_init, /* Init the solution specific data. */
@ -1991,6 +1994,7 @@ static struct df_problem problem_UR =
DF_UR, /* Problem id. */
DF_FORWARD, /* Direction. */
df_ur_alloc, /* Allocate the problem specific data. */
NULL, /* Reset global information. */
df_ur_free_bb_info, /* Free basic block info. */
df_ur_local_compute, /* Local compute function. */
df_ur_init, /* Init the solution specific data. */
@ -2615,6 +2619,7 @@ static struct df_problem problem_UREC =
DF_UREC, /* Problem id. */
DF_FORWARD, /* Direction. */
df_urec_alloc, /* Allocate the problem specific data. */
NULL, /* Reset global information. */
df_urec_free_bb_info, /* Free basic block info. */
df_urec_local_compute, /* Local compute function. */
df_urec_init, /* Init the solution specific data. */
@ -2702,6 +2707,114 @@ df_chain_alloc (struct dataflow *dflow,
}
/* Reset all def_use and use_def chains in INSN. */
static void
df_chain_insn_reset (struct dataflow *dflow, rtx insn)
{
struct df *df = dflow->df;
struct df_chain_problem_data *problem_data =
(struct df_chain_problem_data *) dflow->problem_data;
unsigned int uid = INSN_UID (insn);
struct df_insn_info *insn_info = NULL;
struct df_ref *ref;
if (uid < df->insns_size)
insn_info = DF_INSN_UID_GET (df, uid);
if (insn_info)
{
if (problem_data->flags & DF_DU_CHAIN)
{
ref = insn_info->defs;
while (ref)
{
ref->chain = NULL;
ref = ref->next_ref;
}
}
if (problem_data->flags & DF_UD_CHAIN)
{
ref = insn_info->uses;
while (ref)
{
ref->chain = NULL;
ref = ref->next_ref;
}
}
}
}
/* Reset all def_use and use_def chains in basic block. */
static void
df_chain_bb_reset (struct dataflow *dflow, unsigned int bb_index)
{
struct df *df = dflow->df;
struct df_chain_problem_data *problem_data =
(struct df_chain_problem_data *) dflow->problem_data;
rtx insn;
basic_block bb = BASIC_BLOCK (bb_index);
/* Some one deleted the basic block out from under us. */
if (!bb)
return;
FOR_BB_INSNS (bb, insn)
{
if (INSN_P (insn))
{
/* Record defs within INSN. */
df_chain_insn_reset (dflow, insn);
}
}
/* Get rid of any chains in artifical uses or defs. */
if (problem_data->flags & DF_DU_CHAIN)
{
struct df_ref *def;
def = df_get_artificial_defs (df, bb_index);
while (def)
{
def->chain = NULL;
def = def->next_ref;
}
}
if (problem_data->flags & DF_UD_CHAIN)
{
struct df_ref *use;
use = df_get_artificial_uses (df, bb_index);
while (use)
{
use->chain = NULL;
use = use->next_ref;
}
}
}
/* Reset all of the chains when the set of basic blocks changes. */
static void
df_chain_reset (struct dataflow *dflow, bitmap blocks_to_clear)
{
bitmap_iterator bi;
unsigned int bb_index;
EXECUTE_IF_SET_IN_BITMAP (blocks_to_clear, 0, bb_index, bi)
{
df_chain_bb_reset (dflow, bb_index);
}
free_alloc_pool (dflow->block_pool);
dflow->block_pool = NULL;
}
/* Create the chains for a list of USEs. */
static void
@ -2917,6 +3030,7 @@ static struct df_problem problem_CHAIN =
DF_CHAIN, /* Problem id. */
DF_NONE, /* Direction. */
df_chain_alloc, /* Allocate the problem specific data. */
df_chain_reset, /* Reset global information. */
NULL, /* Free basic block info. */
NULL, /* Local compute function. */
NULL, /* Init the solution specific data. */
@ -3092,6 +3206,7 @@ static struct df_problem problem_RI =
DF_RI, /* Problem id. */
DF_NONE, /* Direction. */
df_ri_alloc, /* Allocate the problem specific data. */
NULL, /* Reset global information. */
NULL, /* Free basic block info. */
df_ri_compute, /* Local compute function. */
NULL, /* Init the solution specific data. */

28
gcc/df-scan.c
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@ -304,6 +304,7 @@ static struct df_problem problem_SCAN =
DF_SCAN, /* Problem id. */
DF_NONE, /* Direction. */
df_scan_alloc, /* Allocate the problem specific data. */
NULL, /* Reset global information. */
df_scan_free_bb_info, /* Free basic block info. */
NULL, /* Local compute function. */
NULL, /* Init the solution specific data. */
@ -426,6 +427,8 @@ df_rescan_blocks (struct df *df, bitmap blocks)
if (blocks)
{
int i;
/* Need to assure that there are space in all of the tables. */
unsigned int insn_num = get_max_uid () + 1;
insn_num += insn_num / 4;
@ -443,6 +446,24 @@ df_rescan_blocks (struct df *df, bitmap blocks)
df->def_info.add_refs_inline = true;
df->use_info.add_refs_inline = true;
for (i = df->num_problems_defined; i; i--)
{
bitmap blocks_to_reset = NULL;
if (*dflow->problem->reset_fun)
{
if (!blocks_to_reset)
{
blocks_to_reset = BITMAP_ALLOC (NULL);
bitmap_copy (blocks_to_reset, local_blocks_to_scan);
if (df->blocks_to_scan)
bitmap_ior_into (blocks_to_reset, df->blocks_to_scan);
}
(*dflow->problem->reset_fun) (dflow, blocks_to_reset);
}
if (blocks_to_reset)
BITMAP_FREE (blocks_to_reset);
}
df_refs_delete (dflow, local_blocks_to_scan);
/* This may be a mistake, but if an explicit blocks is passed in
@ -727,11 +748,14 @@ df_insn_refs_delete (struct dataflow *dflow, rtx insn)
{
struct df *df = dflow->df;
unsigned int uid = INSN_UID (insn);
struct df_insn_info *insn_info = DF_INSN_UID_GET (df, uid);
struct df_insn_info *insn_info = NULL;
struct df_ref *ref;
struct df_scan_problem_data *problem_data =
(struct df_scan_problem_data *) dflow->problem_data;
if (uid < df->insns_size)
insn_info = DF_INSN_UID_GET (df, uid);
if (insn_info)
{
ref = insn_info->defs;
@ -769,7 +793,7 @@ df_bb_refs_delete (struct dataflow *dflow, int bb_index)
}
}
/* Get rid of any artifical uses. */
/* Get rid of any artifical uses or defs. */
if (bb_info)
{
def = bb_info->artificial_defs;

11
gcc/df.h
View File

@ -67,6 +67,14 @@ enum df_flow_dir
/* Allocate the problem specific data. */
typedef void (*df_alloc_function) (struct dataflow *, bitmap);
/* This function is called if the problem has global data that needs
to be cleared when ever the set of blocks changes. The bitmap
contains the set of blocks that may require special attention.
This call is only made if some of the blocks are going to change.
If everything is to be deleted, the wholesale deletion mechanisms
apply. */
typedef void (*df_reset_function) (struct dataflow *, bitmap);
/* Free the basic block info. Called from the block reordering code
to get rid of the blocks that have been squished down. */
typedef void (*df_free_bb_function) (struct dataflow *, basic_block, void *);
@ -108,6 +116,7 @@ struct df_problem {
unsigned int id;
enum df_flow_dir dir; /* Dataflow direction. */
df_alloc_function alloc_fun;
df_reset_function reset_fun;
df_free_bb_function free_bb_fun;
df_local_compute_function local_compute_fun;
df_init_function init_fun;
@ -216,7 +225,7 @@ struct df_ref
basic_block bb; /* Basic block containing the instruction. */
rtx insn; /* Insn containing ref. NB: THIS MAY BE NULL. */
rtx *loc; /* The location of the reg. */
struct df_link *chain; /* Head of def-use, use-def or bi chain. */
struct df_link *chain; /* Head of def-use, use-def. */
unsigned int id; /* Location in table. */
enum df_ref_type type; /* Type of ref. */
enum df_ref_flags flags; /* Various flags. */