#include "timevar.h"
#include "df.h"
#include "vecprim.h"
+#include "except.h"
+
+#if 0
+#define REG_DEAD_DEBUGGING
+#endif
#define DF_SPARSE_THRESHOLD 32
static bitmap seen_in_block = NULL;
static bitmap seen_in_insn = NULL;
+static void df_ri_dump (struct dataflow *, FILE *);
\f
/*----------------------------------------------------------------------------
Public functions access functions for the dataflow problems.
----------------------------------------------------------------------------*/
-/* Get the instance of the problem that DFLOW is dependent on. */
-
-struct dataflow *
-df_get_dependent_problem (struct dataflow *dflow)
-{
- struct df *df = dflow->df;
- struct df_problem *dependent_problem = dflow->problem->dependent_problem;
-
- gcc_assert (dependent_problem);
- return df->problems_by_index[dependent_problem->id];
-}
-
-
/* Create a du or ud chain from SRC to DST and link it into SRC. */
struct df_link *
/* Dump a def-use or use-def chain for REF to FILE. */
void
-df_chain_dump (struct df *df ATTRIBUTE_UNUSED, struct df_link *link, FILE *file)
+df_chain_dump (struct df_link *link, FILE *file)
{
fprintf (file, "{ ");
for (; link; link = link->next)
not touched unless the block is new. */
static void
-df_ru_alloc (struct dataflow *dflow, bitmap blocks_to_rescan)
+df_ru_alloc (struct dataflow *dflow,
+ bitmap blocks_to_rescan ATTRIBUTE_UNUSED,
+ bitmap all_blocks)
{
unsigned int bb_index;
bitmap_iterator bi;
unsigned int reg_size = max_reg_num ();
- if (! dflow->block_pool)
+ if (!dflow->block_pool)
dflow->block_pool = create_alloc_pool ("df_ru_block pool",
sizeof (struct df_ru_bb_info), 50);
if (dflow->problem_data)
{
unsigned int i;
- struct df_ru_problem_data *problem_data =
- (struct df_ru_problem_data *) dflow->problem_data;
+ struct df_ru_problem_data *problem_data
+ = (struct df_ru_problem_data *) dflow->problem_data;
for (i = 0; i < problem_data->use_sites_size; i++)
{
we have to process all of the blocks before doing the
analysis. */
- EXECUTE_IF_SET_IN_BITMAP (blocks_to_rescan, 0, bb_index, bi)
+ EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
struct df_ru_bb_info *bb_info = df_ru_get_bb_info (dflow, bb_index);
if (bb_info)
struct df *df = dflow->df;
while (def)
{
- if (top_flag == (DF_REF_FLAGS (def) & DF_REF_AT_TOP))
+ if ((top_flag == (DF_REF_FLAGS (def) & DF_REF_AT_TOP))
+ /* If the def is to only part of the reg, it is as if it did
+ not happen, since some of the bits may get thru. */
+ && (!(DF_REF_FLAGS (def) & DF_REF_PARTIAL)))
{
unsigned int regno = DF_REF_REGNO (def);
unsigned int begin = DF_REG_USE_GET (df, regno)->begin;
}
else
{
- struct df_ru_problem_data * problem_data =
- (struct df_ru_problem_data *)dflow->problem_data;
- bitmap uses =
- df_ref_bitmap (problem_data->use_sites, regno,
+ struct df_ru_problem_data * problem_data
+ = (struct df_ru_problem_data *)dflow->problem_data;
+ bitmap uses
+ = df_ref_bitmap (problem_data->use_sites, regno,
begin, n_uses);
bitmap_ior_into (bb_info->kill, uses);
bitmap_and_compl_into (bb_info->gen, uses);
FOR_BB_INSNS (bb, insn)
{
unsigned int uid = INSN_UID (insn);
- if (! INSN_P (insn))
+ if (!INSN_P (insn))
continue;
df_ru_bb_local_compute_process_def (dflow, bb_info,
- DF_INSN_UID_GET (df, uid)->defs, 0);
+ DF_INSN_UID_DEFS (df, uid), 0);
/* The use processing must happen after the defs processing even
though the uses logically happen first since the defs clear
the gen set. Otherwise, a use for regno occuring in the same
instruction as a def for regno would be cleared. */
df_ru_bb_local_compute_process_use (bb_info,
- DF_INSN_UID_GET (df, uid)->uses, 0);
+ DF_INSN_UID_USES (df, uid), 0);
bitmap_ior_into (seen_in_block, seen_in_insn);
bitmap_clear (seen_in_insn);
unsigned int bb_index;
bitmap_iterator bi;
unsigned int regno;
- struct df_ru_problem_data *problem_data =
- (struct df_ru_problem_data *) dflow->problem_data;
+ struct df_ru_problem_data *problem_data
+ = (struct df_ru_problem_data *) dflow->problem_data;
bitmap sparse_invalidated = problem_data->sparse_invalidated_by_call;
bitmap dense_invalidated = problem_data->dense_invalidated_by_call;
if (e->flags & EDGE_EH)
{
- struct df_ru_problem_data *problem_data =
- (struct df_ru_problem_data *) dflow->problem_data;
+ struct df_ru_problem_data *problem_data
+ = (struct df_ru_problem_data *) dflow->problem_data;
bitmap sparse_invalidated = problem_data->sparse_invalidated_by_call;
bitmap dense_invalidated = problem_data->dense_invalidated_by_call;
struct df *df = dflow->df;
df_ru_free (struct dataflow *dflow)
{
unsigned int i;
- struct df_ru_problem_data *problem_data =
- (struct df_ru_problem_data *) dflow->problem_data;
+ struct df_ru_problem_data *problem_data
+ = (struct df_ru_problem_data *) dflow->problem_data;
if (problem_data)
{
{
basic_block bb;
struct df *df = dflow->df;
- struct df_ru_problem_data *problem_data =
- (struct df_ru_problem_data *) dflow->problem_data;
+ struct df_ru_problem_data *problem_data
+ = (struct df_ru_problem_data *) dflow->problem_data;
unsigned int m = max_reg_num ();
unsigned int regno;
+
+ if (!dflow->block_info)
+ return;
fprintf (file, "Reaching uses:\n");
struct df_ru_bb_info *bb_info = df_ru_get_bb_info (dflow, bb->index);
df_print_bb_index (bb, file);
- if (! bb_info->in)
+ if (!bb_info->in)
continue;
fprintf (file, " in \t");
NULL, /* Finalize function. */
df_ru_free, /* Free all of the problem information. */
df_ru_dump, /* Debugging. */
- NULL /* Dependent problem. */
+ NULL, /* Dependent problem. */
+ 0 /* Changeable flags. */
};
solution. */
struct dataflow *
-df_ru_add_problem (struct df *df)
+df_ru_add_problem (struct df *df, int flags)
{
- return df_add_problem (df, &problem_RU);
+ return df_add_problem (df, &problem_RU, flags);
}
\f
not touched unless the block is new. */
static void
-df_rd_alloc (struct dataflow *dflow, bitmap blocks_to_rescan)
+df_rd_alloc (struct dataflow *dflow,
+ bitmap blocks_to_rescan ATTRIBUTE_UNUSED,
+ bitmap all_blocks)
{
unsigned int bb_index;
bitmap_iterator bi;
unsigned int reg_size = max_reg_num ();
- if (! dflow->block_pool)
+ if (!dflow->block_pool)
dflow->block_pool = create_alloc_pool ("df_rd_block pool",
sizeof (struct df_rd_bb_info), 50);
if (dflow->problem_data)
{
unsigned int i;
- struct df_rd_problem_data *problem_data =
- (struct df_rd_problem_data *) dflow->problem_data;
+ struct df_rd_problem_data *problem_data
+ = (struct df_rd_problem_data *) dflow->problem_data;
for (i = 0; i < problem_data->def_sites_size; i++)
{
df_grow_bb_info (dflow);
- /* Because of the clustering of all def sites for the same pseudo,
+ /* Because of the clustering of all use sites for the same pseudo,
we have to process all of the blocks before doing the
analysis. */
- EXECUTE_IF_SET_IN_BITMAP (blocks_to_rescan, 0, bb_index, bi)
+ EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
struct df_rd_bb_info *bb_info = df_rd_get_bb_info (dflow, bb_index);
if (bb_info)
{
/* The first def for regno in insn gets to knock out the
defs from other instructions. */
- if (!bitmap_bit_p (seen_in_insn, regno))
+ if ((!bitmap_bit_p (seen_in_insn, regno))
+ /* If the def is to only part of the reg, it does
+ not kill the other defs that reach here. */
+ && (!((DF_REF_FLAGS (def) & DF_REF_PARTIAL)
+ || (DF_REF_FLAGS (def) & DF_REF_MAY_CLOBBER))))
{
if (n_defs > DF_SPARSE_THRESHOLD)
{
}
else
{
- struct df_rd_problem_data * problem_data =
- (struct df_rd_problem_data *)dflow->problem_data;
- bitmap defs =
- df_ref_bitmap (problem_data->def_sites, regno,
- begin, n_defs);
+ struct df_rd_problem_data * problem_data
+ = (struct df_rd_problem_data *)dflow->problem_data;
+ bitmap defs = df_ref_bitmap (problem_data->def_sites,
+ regno, begin, n_defs);
bitmap_ior_into (bb_info->kill, defs);
bitmap_and_compl_into (bb_info->gen, defs);
}
bitmap_set_bit (seen_in_insn, regno);
/* All defs for regno in the instruction may be put into
the gen set. */
- if (! (DF_REF_FLAGS (def) & DF_REF_CLOBBER))
+ if (!(DF_REF_FLAGS (def)
+ & (DF_REF_MUST_CLOBBER | DF_REF_MAY_CLOBBER)))
bitmap_set_bit (bb_info->gen, DF_REF_ID (def));
}
}
{
unsigned int uid = INSN_UID (insn);
- if (! INSN_P (insn))
+ if (!INSN_P (insn))
continue;
df_rd_bb_local_compute_process_def (dflow, bb_info,
- DF_INSN_UID_GET (df, uid)->defs, 0);
+ DF_INSN_UID_DEFS (df, uid), 0);
/* This complex dance with the two bitmaps is required because
instructions can assign twice to the same pseudo. This
unsigned int bb_index;
bitmap_iterator bi;
unsigned int regno;
- struct df_rd_problem_data *problem_data =
- (struct df_rd_problem_data *) dflow->problem_data;
+ struct df_rd_problem_data *problem_data
+ = (struct df_rd_problem_data *) dflow->problem_data;
bitmap sparse_invalidated = problem_data->sparse_invalidated_by_call;
bitmap dense_invalidated = problem_data->dense_invalidated_by_call;
if (e->flags & EDGE_EH)
{
- struct df_rd_problem_data *problem_data =
- (struct df_rd_problem_data *) dflow->problem_data;
+ struct df_rd_problem_data *problem_data
+ = (struct df_rd_problem_data *) dflow->problem_data;
bitmap sparse_invalidated = problem_data->sparse_invalidated_by_call;
bitmap dense_invalidated = problem_data->dense_invalidated_by_call;
struct df *df = dflow->df;
df_rd_free (struct dataflow *dflow)
{
unsigned int i;
- struct df_rd_problem_data *problem_data =
- (struct df_rd_problem_data *) dflow->problem_data;
+ struct df_rd_problem_data *problem_data
+ = (struct df_rd_problem_data *) dflow->problem_data;
if (problem_data)
{
{
struct df *df = dflow->df;
basic_block bb;
- struct df_rd_problem_data *problem_data =
- (struct df_rd_problem_data *) dflow->problem_data;
+ struct df_rd_problem_data *problem_data
+ = (struct df_rd_problem_data *) dflow->problem_data;
unsigned int m = max_reg_num ();
unsigned int regno;
+ if (!dflow->block_info)
+ return;
+
fprintf (file, "Reaching defs:\n\n");
fprintf (file, " sparse invalidated \t");
struct df_rd_bb_info *bb_info = df_rd_get_bb_info (dflow, bb->index);
df_print_bb_index (bb, file);
- if (! bb_info->in)
+ if (!bb_info->in)
continue;
fprintf (file, " in\t(%d)\n", (int) bitmap_count_bits (bb_info->in));
NULL, /* Finalize function. */
df_rd_free, /* Free all of the problem information. */
df_rd_dump, /* Debugging. */
- NULL /* Dependent problem. */
+ NULL, /* Dependent problem. */
+ 0 /* Changeable flags. */
};
solution. */
struct dataflow *
-df_rd_add_problem (struct df *df)
+df_rd_add_problem (struct df *df, int flags)
{
- return df_add_problem (df, &problem_RD);
+ return df_add_problem (df, &problem_RD, flags);
}
not touched unless the block is new. */
static void
-df_lr_alloc (struct dataflow *dflow, bitmap blocks_to_rescan)
+df_lr_alloc (struct dataflow *dflow, bitmap blocks_to_rescan,
+ bitmap all_blocks ATTRIBUTE_UNUSED)
{
unsigned int bb_index;
bitmap_iterator bi;
- if (! dflow->block_pool)
+ if (!dflow->block_pool)
dflow->block_pool = create_alloc_pool ("df_lr_block pool",
sizeof (struct df_lr_bb_info), 50);
df_grow_bb_info (dflow);
- /* Because of the clustering of all def sites for the same pseudo,
- we have to process all of the blocks before doing the
- analysis. */
-
EXECUTE_IF_SET_IN_BITMAP (blocks_to_rescan, 0, bb_index, bi)
{
struct df_lr_bb_info *bb_info = df_lr_get_bb_info (dflow, bb_index);
/* Process the registers set in an exception handler. */
for (def = df_get_artificial_defs (df, bb_index); def; def = def->next_ref)
- if ((DF_REF_FLAGS (def) & DF_REF_AT_TOP) == 0)
+ if (((DF_REF_FLAGS (def) & DF_REF_AT_TOP) == 0)
+ && (!(DF_REF_FLAGS (def) & DF_REF_PARTIAL)))
{
unsigned int dregno = DF_REF_REGNO (def);
bitmap_set_bit (bb_info->def, dregno);
{
unsigned int uid = INSN_UID (insn);
- if (! INSN_P (insn))
+ if (!INSN_P (insn))
continue;
if (CALL_P (insn))
{
- for (def = DF_INSN_UID_GET (df, uid)->defs; def; def = def->next_ref)
+ for (def = DF_INSN_UID_DEFS (df, uid); def; def = def->next_ref)
{
unsigned int dregno = DF_REF_REGNO (def);
current_function_return_rtx,
(rtx *)0)))
{
- /* Add def to set of defs in this BB. */
- bitmap_set_bit (bb_info->def, dregno);
- bitmap_clear_bit (bb_info->use, dregno);
+ /* If the def is to only part of the reg, it does
+ not kill the other defs that reach here. */
+ if (!(DF_REF_FLAGS (def) & DF_REF_PARTIAL))
+ {
+ bitmap_set_bit (bb_info->def, dregno);
+ bitmap_clear_bit (bb_info->use, dregno);
+ }
}
}
}
else
{
- for (def = DF_INSN_UID_GET (df, uid)->defs; def; def = def->next_ref)
+ for (def = DF_INSN_UID_DEFS (df, uid); def; def = def->next_ref)
{
unsigned int dregno = DF_REF_REGNO (def);
&& dregno < FIRST_PSEUDO_REGISTER)
{
unsigned int i;
- unsigned int end =
- dregno + hard_regno_nregs[dregno][GET_MODE (DF_REF_REG (def))] - 1;
+ unsigned int end = dregno
+ + hard_regno_nregs[dregno][GET_MODE (DF_REF_REG (def))] - 1;
for (i = dregno; i <= end; ++i)
regs_asm_clobbered[i] = 1;
}
- /* Add def to set of defs in this BB. */
- bitmap_set_bit (bb_info->def, dregno);
- bitmap_clear_bit (bb_info->use, dregno);
+ /* If the def is to only part of the reg, it does
+ not kill the other defs that reach here. */
+ if (!(DF_REF_FLAGS (def) & DF_REF_PARTIAL))
+ {
+ bitmap_set_bit (bb_info->def, dregno);
+ bitmap_clear_bit (bb_info->use, dregno);
+ }
}
}
- for (use = DF_INSN_UID_GET (df, uid)->uses; use; use = use->next_ref)
+ for (use = DF_INSN_UID_USES (df, uid); use; use = use->next_ref)
/* Add use to set of uses in this BB. */
bitmap_set_bit (bb_info->use, DF_REF_REGNO (use));
}
/* Process the registers set in an exception handler. */
for (def = df_get_artificial_defs (df, bb_index); def; def = def->next_ref)
- if (DF_REF_FLAGS (def) & DF_REF_AT_TOP)
+ if ((DF_REF_FLAGS (def) & DF_REF_AT_TOP)
+ && (!(DF_REF_FLAGS (def) & DF_REF_PARTIAL)))
{
unsigned int dregno = DF_REF_REGNO (def);
bitmap_set_bit (bb_info->def, dregno);
#endif
}
+
/* Compute local live register info for each basic block within BLOCKS. */
static void
/* Before reload, there are a few registers that must be forced
live everywhere -- which might not already be the case for
blocks within infinite loops. */
- if (! reload_completed)
+ if (!reload_completed)
{
/* Any reference to any pseudo before reload is a potential
reference of the frame pointer. */
/* Confluence function that ignores fake edges. */
+
static void
df_lr_confluence_n (struct dataflow *dflow, edge e)
{
/* Transfer function. */
+
static bool
df_lr_transfer_function (struct dataflow *dflow, int bb_index)
{
dflow->block_info_size = 0;
free (dflow->block_info);
}
+
+ free (dflow->problem_data);
free (dflow);
}
{
basic_block bb;
+ if (!dflow->block_info)
+ return;
+
fprintf (file, "Live Registers:\n");
FOR_ALL_BB (bb)
{
NULL, /* Finalize function. */
df_lr_free, /* Free all of the problem information. */
df_lr_dump, /* Debugging. */
- NULL /* Dependent problem. */
+ NULL, /* Dependent problem. */
+ 0
};
solution. */
struct dataflow *
-df_lr_add_problem (struct df *df)
+df_lr_add_problem (struct df *df, int flags)
{
- return df_add_problem (df, &problem_LR);
+ return df_add_problem (df, &problem_LR, flags);
}
not touched unless the block is new. */
static void
-df_ur_alloc (struct dataflow *dflow, bitmap blocks_to_rescan)
+df_ur_alloc (struct dataflow *dflow, bitmap blocks_to_rescan,
+ bitmap all_blocks ATTRIBUTE_UNUSED)
{
unsigned int bb_index;
bitmap_iterator bi;
- if (! dflow->block_pool)
+ if (!dflow->block_pool)
dflow->block_pool = create_alloc_pool ("df_ur_block pool",
sizeof (struct df_ur_bb_info), 100);
df_grow_bb_info (dflow);
- /* Because of the clustering of all def sites for the same pseudo,
- we have to process all of the blocks before doing the
- analysis. */
-
EXECUTE_IF_SET_IN_BITMAP (blocks_to_rescan, 0, bb_index, bi)
{
struct df_ur_bb_info *bb_info = df_ur_get_bb_info (dflow, bb_index);
if (!INSN_P (insn))
continue;
- for (def = DF_INSN_UID_GET (df, uid)->defs; def; def = def->next_ref)
+ for (def = DF_INSN_UID_DEFS (df, uid); def; def = def->next_ref)
{
unsigned int regno = DF_REF_REGNO (def);
- /* Only the last def counts. */
+ /* Only the last def counts. */
if (!bitmap_bit_p (seen_in_block, regno))
{
bitmap_set_bit (seen_in_insn, regno);
- if (DF_REF_FLAGS (def) & DF_REF_CLOBBER)
- bitmap_set_bit (bb_info->kill, regno);
+ if (DF_REF_FLAGS (def)
+ & (DF_REF_MUST_CLOBBER | DF_REF_MAY_CLOBBER))
+ {
+ /* Only must clobbers for the entire reg destroy the
+ value. */
+ if ((DF_REF_FLAGS (def) & DF_REF_MUST_CLOBBER)
+ && (!DF_REF_FLAGS (def) & DF_REF_PARTIAL))
+ bitmap_set_bit (bb_info->kill, regno);
+ }
else
bitmap_set_bit (bb_info->gen, regno);
}
bitmap_and_into (bb_info->out, tmp);
#endif
}
-
+
BITMAP_FREE (tmp);
}
{
basic_block bb;
+ if (!dflow->block_info)
+ return;
+
fprintf (file, "Undefined regs:\n");
FOR_ALL_BB (bb)
struct df_ur_bb_info *bb_info = df_ur_get_bb_info (dflow, bb->index);
df_print_bb_index (bb, file);
- if (! bb_info->in)
+ if (!bb_info->in)
continue;
fprintf (file, " in \t");
df_ur_local_finalize, /* Finalize function. */
df_ur_free, /* Free all of the problem information. */
df_ur_dump, /* Debugging. */
- &problem_LR /* Dependent problem. */
+ df_lr_add_problem, /* Dependent problem. */
+ 0 /* Changeable flags. */
};
solution. */
struct dataflow *
-df_ur_add_problem (struct df *df)
+df_ur_add_problem (struct df *df, int flags)
{
- return df_add_problem (df, &problem_UR);
+ return df_add_problem (df, &problem_UR, flags);
}
not touched unless the block is new. */
static void
-df_urec_alloc (struct dataflow *dflow, bitmap blocks_to_rescan)
+df_urec_alloc (struct dataflow *dflow, bitmap blocks_to_rescan,
+ bitmap all_blocks ATTRIBUTE_UNUSED)
+
{
unsigned int bb_index;
bitmap_iterator bi;
- struct df_urec_problem_data *problem_data =
- (struct df_urec_problem_data *) dflow->problem_data;
+ struct df_urec_problem_data *problem_data
+ = (struct df_urec_problem_data *) dflow->problem_data;
- if (! dflow->block_pool)
+ if (!dflow->block_pool)
dflow->block_pool = create_alloc_pool ("df_urec_block pool",
sizeof (struct df_urec_bb_info), 50);
df_grow_bb_info (dflow);
- /* Because of the clustering of all def sites for the same pseudo,
- we have to process all of the blocks before doing the
- analysis. */
-
EXECUTE_IF_SET_IN_BITMAP (blocks_to_rescan, 0, bb_index, bi)
{
struct df_urec_bb_info *bb_info = df_urec_get_bb_info (dflow, bb_index);
if (INSN_P (insn))
{
note_stores (PATTERN (insn), df_urec_mark_reg_change, bb_info);
- if (df_state & (DF_SCAN_GLOBAL | DF_SCAN_POST_ALLOC)
- && df_urec_check_earlyclobber (insn))
+ if (df_urec_check_earlyclobber (insn))
{
- struct df_urec_problem_data *problem_data =
- (struct df_urec_problem_data *) dflow->problem_data;
+ struct df_urec_problem_data *problem_data
+ = (struct df_urec_problem_data *) dflow->problem_data;
problem_data->earlyclobbers_found = true;
note_uses (&PATTERN (insn),
df_urec_mark_reg_use_for_earlyclobber_1, bb_info);
#ifdef STACK_REGS
int i;
HARD_REG_SET zero, stack_hard_regs, used;
- struct df_urec_problem_data *problem_data =
- (struct df_urec_problem_data *) dflow->problem_data;
+ struct df_urec_problem_data *problem_data
+ = (struct df_urec_problem_data *) dflow->problem_data;
/* Any register that MAY be allocated to a register stack (like the
387) is treated poorly. Each such register is marked as being
bitmap tmp = BITMAP_ALLOC (NULL);
bitmap_iterator bi;
unsigned int bb_index;
- struct df_urec_problem_data *problem_data =
- (struct df_urec_problem_data *) dflow->problem_data;
+ struct df_urec_problem_data *problem_data
+ = (struct df_urec_problem_data *) dflow->problem_data;
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
{
basic_block bb;
+ if (!dflow->block_info)
+ return;
+
fprintf (file, "Undefined regs:\n");
FOR_ALL_BB (bb)
struct df_urec_bb_info *bb_info = df_urec_get_bb_info (dflow, bb->index);
df_print_bb_index (bb, file);
- if (! bb_info->in)
+ if (!bb_info->in)
continue;
fprintf (file, " in \t");
df_urec_local_finalize, /* Finalize function. */
df_urec_free, /* Free all of the problem information. */
df_urec_dump, /* Debugging. */
- &problem_LR /* Dependent problem. */
+ df_lr_add_problem, /* Dependent problem. */
+ 0 /* Changeable flags. */
};
solution. */
struct dataflow *
-df_urec_add_problem (struct df *df)
+df_urec_add_problem (struct df *df, int flags)
{
- return df_add_problem (df, &problem_UREC);
+ return df_add_problem (df, &problem_UREC, flags);
}
the reaching defs information (the dependent problem).
----------------------------------------------------------------------------*/
-struct df_chain_problem_data
-{
- int flags;
-};
-
-
/* Create def-use or use-def chains. */
static void
df_chain_alloc (struct dataflow *dflow,
- bitmap blocks_to_rescan ATTRIBUTE_UNUSED)
+ bitmap blocks_to_rescan ATTRIBUTE_UNUSED,
+ bitmap all_blocks ATTRIBUTE_UNUSED)
+
{
struct df *df = dflow->df;
unsigned int i;
- struct df_chain_problem_data *problem_data =
- (struct df_chain_problem_data *) dflow->problem_data;
/* Wholesale destruction of the old chains. */
if (dflow->block_pool)
dflow->block_pool = create_alloc_pool ("df_chain_chain_block pool",
sizeof (struct df_link), 100);
- if (problem_data->flags & DF_DU_CHAIN)
+ if (dflow->flags & DF_DU_CHAIN)
{
if (!df->def_info.refs_organized)
df_reorganize_refs (&df->def_info);
}
}
- if (problem_data->flags & DF_UD_CHAIN)
+ if (dflow->flags & DF_UD_CHAIN)
{
if (!df->use_info.refs_organized)
df_reorganize_refs (&df->use_info);
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 (insn_info)
{
- if (problem_data->flags & DF_DU_CHAIN)
+ if (dflow->flags & DF_DU_CHAIN)
{
ref = insn_info->defs;
while (ref)
}
}
- if (problem_data->flags & DF_UD_CHAIN)
+ if (dflow->flags & DF_UD_CHAIN)
{
ref = insn_info->uses;
while (ref)
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);
}
/* Get rid of any chains in artificial uses or defs. */
- if (problem_data->flags & DF_DU_CHAIN)
+ if (dflow->flags & DF_DU_CHAIN)
{
struct df_ref *def;
def = df_get_artificial_defs (df, bb_index);
}
}
- if (problem_data->flags & DF_UD_CHAIN)
+ if (dflow->flags & DF_UD_CHAIN)
{
struct df_ref *use;
use = df_get_artificial_uses (df, bb_index);
static void
df_chain_create_bb_process_use (struct dataflow *dflow,
- struct df_chain_problem_data *problem_data,
bitmap local_rd,
struct df_ref *use,
enum df_ref_flags top_flag)
break;
def = DF_DEFS_GET (df, def_index);
- if (problem_data->flags & DF_DU_CHAIN)
+ if (dflow->flags & DF_DU_CHAIN)
df_chain_create (dflow, def, use);
- if (problem_data->flags & DF_UD_CHAIN)
+ if (dflow->flags & DF_UD_CHAIN)
df_chain_create (dflow, use, def);
}
}
rtx insn;
bitmap cpy = BITMAP_ALLOC (NULL);
struct df *df = dflow->df;
- struct df_chain_problem_data *problem_data =
- (struct df_chain_problem_data *) dflow->problem_data;
struct df_ref *def;
bitmap_copy (cpy, bb_info->in);
#ifdef EH_USES
/* Create the chains for the artificial uses from the EH_USES at the
beginning of the block. */
- df_chain_create_bb_process_use (dflow, problem_data, cpy,
+ df_chain_create_bb_process_use (dflow, cpy,
df_get_artificial_uses (df, bb->index),
DF_REF_AT_TOP);
#endif
if (DF_REF_FLAGS (def) & DF_REF_AT_TOP)
{
unsigned int dregno = DF_REF_REGNO (def);
- bitmap_clear_range (cpy,
- DF_REG_DEF_GET (df, dregno)->begin,
- DF_REG_DEF_GET (df, dregno)->n_refs);
- if (! (DF_REF_FLAGS (def) & DF_REF_CLOBBER))
- bitmap_set_bit (cpy, DF_REF_ID (def));
+ if (!(DF_REF_FLAGS (def) & DF_REF_PARTIAL))
+ bitmap_clear_range (cpy,
+ DF_REG_DEF_GET (df, dregno)->begin,
+ DF_REG_DEF_GET (df, dregno)->n_refs);
+ bitmap_set_bit (cpy, DF_REF_ID (def));
}
/* Process the regular instructions next. */
struct df_ref *def;
unsigned int uid = INSN_UID (insn);
- if (! INSN_P (insn))
+ if (!INSN_P (insn))
continue;
/* Now scan the uses and link them up with the defs that remain
in the cpy vector. */
- df_chain_create_bb_process_use (dflow, problem_data, cpy,
- DF_INSN_UID_GET (df, uid)->uses, 0);
+ df_chain_create_bb_process_use (dflow, cpy,
+ DF_INSN_UID_USES (df, uid), 0);
/* Since we are going forwards, process the defs second. This
pass only changes the bits in cpy. */
- for (def = DF_INSN_UID_GET (df, uid)->defs; def; def = def->next_ref)
+ for (def = DF_INSN_UID_DEFS (df, uid); def; def = def->next_ref)
{
unsigned int dregno = DF_REF_REGNO (def);
- bitmap_clear_range (cpy,
- DF_REG_DEF_GET (df, dregno)->begin,
- DF_REG_DEF_GET (df, dregno)->n_refs);
- if (! (DF_REF_FLAGS (def) & DF_REF_CLOBBER))
+ if (!(DF_REF_FLAGS (def) & DF_REF_PARTIAL))
+ bitmap_clear_range (cpy,
+ DF_REG_DEF_GET (df, dregno)->begin,
+ DF_REG_DEF_GET (df, dregno)->n_refs);
+ if (!(DF_REF_FLAGS (def)
+ & (DF_REF_MUST_CLOBBER | DF_REF_MAY_CLOBBER)))
bitmap_set_bit (cpy, DF_REF_ID (def));
}
}
/* Create the chains for the artificial uses of the hard registers
at the end of the block. */
- df_chain_create_bb_process_use (dflow, problem_data, cpy,
+ df_chain_create_bb_process_use (dflow, cpy,
df_get_artificial_uses (df, bb->index), 0);
}
df_chain_free (struct dataflow *dflow)
{
free_alloc_pool (dflow->block_pool);
- free (dflow->problem_data);
free (dflow);
}
{
struct df *df = dflow->df;
unsigned int j;
- struct df_chain_problem_data *problem_data =
- (struct df_chain_problem_data *) dflow->problem_data;
- if (problem_data->flags & DF_DU_CHAIN)
+ if (dflow->flags & DF_DU_CHAIN)
{
fprintf (file, "Def-use chains:\n");
for (j = 0; j < df->def_info.bitmap_size; j++)
DF_REF_REGNO (def));
if (def->flags & DF_REF_READ_WRITE)
fprintf (file, "read/write ");
- df_chain_dump (df, DF_REF_CHAIN (def), file);
+ df_chain_dump (DF_REF_CHAIN (def), file);
fprintf (file, "\n");
}
}
}
- if (problem_data->flags & DF_UD_CHAIN)
+ if (dflow->flags & DF_UD_CHAIN)
{
fprintf (file, "Use-def chains:\n");
for (j = 0; j < df->use_info.bitmap_size; j++)
fprintf (file, "stripped ");
if (use->flags & DF_REF_IN_NOTE)
fprintf (file, "note ");
- df_chain_dump (df, DF_REF_CHAIN (use), file);
+ df_chain_dump (DF_REF_CHAIN (use), file);
fprintf (file, "\n");
}
}
df_chain_finalize, /* Finalize function. */
df_chain_free, /* Free all of the problem information. */
df_chains_dump, /* Debugging. */
- &problem_RD /* Dependent problem. */
+ df_rd_add_problem, /* Dependent problem. */
+ 0 /* Changeable flags. */
};
struct dataflow *
df_chain_add_problem (struct df *df, int flags)
{
- struct df_chain_problem_data *problem_data =
- XNEW (struct df_chain_problem_data);
- struct dataflow *dflow = df_add_problem (df, &problem_CHAIN);
-
- dflow->problem_data = problem_data;
- problem_data->flags = flags;
-
- return dflow;
+ return df_add_problem (df, &problem_CHAIN, flags);
}
/*----------------------------------------------------------------------------
REGISTER INFORMATION
- Currently this consists of only lifetime information. But the plan is
- to enhance it so that it produces all of the register information needed
- by the register allocators.
-----------------------------------------------------------------------------*/
-
+ Currently this consists of only lifetime information and reg_dead
+ and reg_unused.
+ ----------------------------------------------------------------------------*/
-struct df_ri_problem_data
+#ifdef REG_DEAD_DEBUGGING
+static void
+print_note (char *prefix, rtx insn, rtx note)
{
- int *lifetime;
-};
-
+ fprintf (stderr, "%s %d ", prefix, INSN_UID (insn));
+ print_rtl (stderr, note);
+ fprintf (stderr, "\n");
+}
+#endif
/* Allocate the lifetime information. */
static void
-df_ri_alloc (struct dataflow *dflow, bitmap blocks_to_rescan ATTRIBUTE_UNUSED)
+df_ri_alloc (struct dataflow *dflow,
+ bitmap blocks_to_rescan ATTRIBUTE_UNUSED,
+ bitmap all_blocks ATTRIBUTE_UNUSED)
{
- struct df_ri_problem_data *problem_data =
- (struct df_ri_problem_data *) dflow->problem_data;
+ int i;
+ struct df *df = dflow->df;
- if (!dflow->problem_data)
+ if (dflow->flags & DF_RI_LIFE)
{
- struct df_ri_problem_data *problem_data = XNEW (struct df_ri_problem_data);
- dflow->problem_data = problem_data;
+ max_regno = max_reg_num ();
+ allocate_reg_info (max_regno, FALSE, FALSE);
+
+ /* Reset all the data we'll collect. */
+ for (i = 0; i < max_regno; i++)
+ {
+ REG_N_SETS (i) = DF_REG_DEF_COUNT (df, i);
+ REG_N_REFS (i) = DF_REG_USE_COUNT (df, i) + REG_N_SETS (i);
+ REG_N_DEATHS (i) = 0;
+ REG_N_CALLS_CROSSED (i) = 0;
+ REG_N_THROWING_CALLS_CROSSED (i) = 0;
+ REG_LIVE_LENGTH (i) = 0;
+ REG_FREQ (i) = 0;
+ REG_BASIC_BLOCK (i) = REG_BLOCK_UNKNOWN;
+ }
+ }
+}
+
+
+/* After reg-stack, the x86 floating point stack regs are difficult to
+ analyze because of all of the pushes, pops and rotations. Thus, we
+ just leave the notes alone. */
+
+static inline bool
+df_ignore_stack_reg (int regno ATTRIBUTE_UNUSED)
+{
+#ifdef STACK_REGS
+ return (regstack_completed
+ && IN_RANGE (regno, FIRST_STACK_REG, LAST_STACK_REG));
+#else
+ return false;
+#endif
+}
+
+
+/* Remove all of the REG_DEAD or REG_UNUSED notes from INSN. */
+
+static void
+df_kill_notes (rtx insn, int flags)
+{
+ rtx *pprev = ®_NOTES (insn);
+ rtx link = *pprev;
+
+ while (link)
+ {
+ switch (REG_NOTE_KIND (link))
+ {
+ case REG_DEAD:
+ if (flags & DF_RI_LIFE)
+ if (df_ignore_stack_reg (REGNO (XEXP (link, 0))))
+ REG_N_DEATHS (REGNO (XEXP (link, 0)))++;
+
+ /* Fallthru */
+ case REG_UNUSED:
+ if (!df_ignore_stack_reg (REGNO (XEXP (link, 0))))
+ {
+ rtx next = XEXP (link, 1);
+#ifdef REG_DEAD_DEBUGGING
+ print_note ("deleting: ", insn, link);
+#endif
+ free_EXPR_LIST_node (link);
+ *pprev = link = next;
+ }
+ break;
+
+ default:
+ pprev = &XEXP (link, 1);
+ link = *pprev;
+ break;
+ }
+ }
+}
+
+
+/* Set the REG_UNUSED notes for the multiword hardreg defs in INSN
+ based on the bits in LIVE. Do not generate notes for registers in
+ artificial uses. DO_NOT_GEN is updated so that REG_DEAD notes are
+ not generated if the reg is both read and written by the
+ instruction.
+*/
+
+static void
+df_set_unused_notes_for_mw (rtx insn, struct df_mw_hardreg *mws,
+ bitmap live, bitmap do_not_gen,
+ bitmap artificial_uses, int flags)
+{
+ bool all_dead = true;
+ struct df_link *regs = mws->regs;
+ unsigned int regno = DF_REF_REGNO (regs->ref);
+
+#ifdef REG_DEAD_DEBUGGING
+ fprintf (stderr, "mw unused looking at %d\n", DF_REF_REGNO (regs->ref));
+ df_ref_debug (regs->ref, stderr);
+#endif
+ while (regs)
+ {
+ unsigned int regno = DF_REF_REGNO (regs->ref);
+ if ((bitmap_bit_p (live, regno))
+ || bitmap_bit_p (artificial_uses, regno))
+ {
+ all_dead = false;
+ break;
+ }
+ regs = regs->next;
+ }
+
+ if (all_dead)
+ {
+ struct df_link *regs = mws->regs;
+ rtx note = alloc_EXPR_LIST (REG_UNUSED, *DF_REF_LOC (regs->ref),
+ REG_NOTES (insn));
+ REG_NOTES (insn) = note;
+#ifdef REG_DEAD_DEBUGGING
+ print_note ("adding 1: ", insn, note);
+#endif
+ bitmap_set_bit (do_not_gen, regno);
+ /* Only do this if the value is totally dead. */
+ if (flags & DF_RI_LIFE)
+ {
+ REG_N_DEATHS (regno) ++;
+ REG_LIVE_LENGTH (regno)++;
+ }
+ }
+ else
+ {
+ struct df_link *regs = mws->regs;
+ while (regs)
+ {
+ struct df_ref *ref = regs->ref;
+
+ regno = DF_REF_REGNO (ref);
+ if ((!bitmap_bit_p (live, regno))
+ && (!bitmap_bit_p (artificial_uses, regno)))
+ {
+ rtx note = alloc_EXPR_LIST (REG_UNUSED, regno_reg_rtx[regno],
+ REG_NOTES (insn));
+ REG_NOTES (insn) = note;
+#ifdef REG_DEAD_DEBUGGING
+ print_note ("adding 2: ", insn, note);
+#endif
+ }
+ bitmap_set_bit (do_not_gen, regno);
+ regs = regs->next;
+ }
+ }
+}
+
+
+/* Set the REG_DEAD notes for the multiword hardreg use in INSN based
+ on the bits in LIVE. DO_NOT_GEN is used to keep REG_DEAD notes
+ from being set if the instruction both reads and writes the
+ register. */
+
+static void
+df_set_dead_notes_for_mw (rtx insn, struct df_mw_hardreg *mws,
+ bitmap live, bitmap do_not_gen,
+ bitmap artificial_uses, int flags)
+{
+ bool all_dead = true;
+ struct df_link *regs = mws->regs;
+ unsigned int regno = DF_REF_REGNO (regs->ref);
+
+#ifdef REG_DEAD_DEBUGGING
+ fprintf (stderr, "mw looking at %d\n", DF_REF_REGNO (regs->ref));
+ df_ref_debug (regs->ref, stderr);
+#endif
+ while (regs)
+ {
+ unsigned int regno = DF_REF_REGNO (regs->ref);
+ if ((bitmap_bit_p (live, regno))
+ || bitmap_bit_p (artificial_uses, regno))
+ {
+ all_dead = false;
+ break;
+ }
+ regs = regs->next;
+ }
+
+ if (all_dead)
+ {
+ if (!bitmap_bit_p (do_not_gen, regno))
+ {
+ /* Add a dead note for the entire multi word register. */
+ struct df_link *regs = mws->regs;
+ rtx note = alloc_EXPR_LIST (REG_DEAD, *DF_REF_LOC (regs->ref),
+ REG_NOTES (insn));
+ REG_NOTES (insn) = note;
+#ifdef REG_DEAD_DEBUGGING
+ print_note ("adding 1: ", insn, note);
+#endif
+
+ if (flags & DF_RI_LIFE)
+ {
+ struct df_link *regs = mws->regs;
+ while (regs)
+ {
+ struct df_ref *ref = regs->ref;
+ regno = DF_REF_REGNO (ref);
+ REG_N_DEATHS (regno)++;
+ regs = regs->next;
+ }
+ }
+ }
+ }
+ else
+ {
+ struct df_link *regs = mws->regs;
+ while (regs)
+ {
+ struct df_ref *ref = regs->ref;
+
+ regno = DF_REF_REGNO (ref);
+ if ((!bitmap_bit_p (live, regno))
+ && (!bitmap_bit_p (artificial_uses, regno))
+ && (!bitmap_bit_p (do_not_gen, regno)))
+ {
+ rtx note = alloc_EXPR_LIST (REG_DEAD, regno_reg_rtx[regno],
+ REG_NOTES (insn));
+ REG_NOTES (insn) = note;
+ if (flags & DF_RI_LIFE)
+ REG_N_DEATHS (regno)++;
+#ifdef REG_DEAD_DEBUGGING
+ print_note ("adding 2: ", insn, note);
+#endif
+ }
+
+ regs = regs->next;
+ }
+ }
+}
+
+
+/* Create a REG_UNUSED note if necessary for DEF in INSN updating LIVE
+ and DO_NOT_GEN. Do not generate notes for registers in artificial
+ uses. */
+
+static void
+df_create_unused_note (basic_block bb, rtx insn, struct df_ref *def,
+ bitmap live, bitmap do_not_gen, bitmap artificial_uses,
+ bitmap local_live, bitmap local_processed,
+ int flags, int luid)
+{
+ unsigned int dregno = DF_REF_REGNO (def);
+
+#ifdef REG_DEAD_DEBUGGING
+ fprintf (stderr, " regular looking at def ");
+ df_ref_debug (def, stderr);
+#endif
+
+ if (bitmap_bit_p (live, dregno))
+ {
+ if (flags & DF_RI_LIFE)
+ {
+ /* If we have seen this regno, then it has already been
+ processed correctly with the per insn increment. If we
+ have not seen it we need to add the length from here to
+ the end of the block to the live length. */
+ if (bitmap_bit_p (local_processed, dregno))
+ {
+ if (!(DF_REF_FLAGS (def) & DF_REF_PARTIAL))
+ bitmap_clear_bit (local_live, dregno);
+ }
+ else
+ {
+ bitmap_set_bit (local_processed, dregno);
+ REG_LIVE_LENGTH (dregno) += luid;
+ }
+ }
+ }
+ else if ((!(DF_REF_FLAGS (def) & DF_REF_MW_HARDREG))
+ && (!bitmap_bit_p (artificial_uses, dregno))
+ && (!df_ignore_stack_reg (dregno)))
+ {
+ rtx reg = GET_CODE (*DF_REF_LOC (def)) == SUBREG ?
+ SUBREG_REG (*DF_REF_LOC (def)) : *DF_REF_LOC (def);
+ rtx note = alloc_EXPR_LIST (REG_UNUSED, reg, REG_NOTES (insn));
+ REG_NOTES (insn) = note;
+#ifdef REG_DEAD_DEBUGGING
+ print_note ("adding 3: ", insn, note);
+#endif
+ if (flags & DF_RI_LIFE)
+ {
+ REG_N_DEATHS (dregno) ++;
+ REG_LIVE_LENGTH (dregno)++;
+ }
+ }
+
+ if ((flags & DF_RI_LIFE) && (dregno >= FIRST_PSEUDO_REGISTER))
+ {
+ REG_FREQ (dregno) += REG_FREQ_FROM_BB (bb);
+ if (REG_BASIC_BLOCK (dregno) == REG_BLOCK_UNKNOWN)
+ REG_BASIC_BLOCK (dregno) = bb->index;
+ else if (REG_BASIC_BLOCK (dregno) != bb->index)
+ REG_BASIC_BLOCK (dregno) = REG_BLOCK_GLOBAL;
}
- problem_data->lifetime = xrealloc (problem_data->lifetime,
- max_reg_num () *sizeof (int));
- memset (problem_data->lifetime, 0, max_reg_num () *sizeof (int));
+ if (!(DF_REF_FLAGS (def) & (DF_REF_MUST_CLOBBER + DF_REF_MAY_CLOBBER)))
+ bitmap_set_bit (do_not_gen, dregno);
+
+ /* Kill this register if it is not a subreg store. */
+ if (!(DF_REF_FLAGS (def) & DF_REF_PARTIAL))
+ bitmap_clear_bit (live, dregno);
}
-/* Compute register info: lifetime, bb, and number of defs and uses
- for basic block BB. */
+
+/* Recompute the REG_DEAD and REG_UNUSED notes and compute register
+ info: lifetime, bb, and number of defs and uses for basic block
+ BB. The three bitvectors are scratch regs used here. */
static void
-df_ri_bb_compute (struct dataflow *dflow, unsigned int bb_index, bitmap live)
+df_ri_bb_compute (struct dataflow *dflow, unsigned int bb_index,
+ bitmap live, bitmap do_not_gen, bitmap artificial_uses,
+ bitmap local_live, bitmap local_processed, bitmap setjumps_crossed)
{
struct df *df = dflow->df;
- struct df_ur_bb_info *bb_info = df_ur_get_bb_info (dflow, bb_index);
- struct df_ri_problem_data *problem_data =
- (struct df_ri_problem_data *) dflow->problem_data;
basic_block bb = BASIC_BLOCK (bb_index);
rtx insn;
+ struct df_ref *def;
+ struct df_ref *use;
+ int luid = 0;
+
+ bitmap_copy (live, df_get_live_out (df, bb));
+ bitmap_clear (artificial_uses);
+
+ if (dflow->flags & DF_RI_LIFE)
+ {
+ /* Process the regs live at the end of the block. Mark them as
+ not local to any one basic block. */
+ bitmap_iterator bi;
+ unsigned int regno;
+ EXECUTE_IF_SET_IN_BITMAP (live, 0, regno, bi)
+ REG_BASIC_BLOCK (regno) = REG_BLOCK_GLOBAL;
+ }
+
+ /* Process the artificial defs and uses at the bottom of the block
+ to begin processing. */
+ for (def = df_get_artificial_defs (df, bb_index); def; def = def->next_ref)
+ if ((DF_REF_FLAGS (def) & DF_REF_AT_TOP) == 0)
+ bitmap_clear_bit (live, DF_REF_REGNO (def));
- bitmap_copy (live, bb_info->out);
+ for (use = df_get_artificial_uses (df, bb_index); use; use = use->next_ref)
+ if ((DF_REF_FLAGS (use) & DF_REF_AT_TOP) == 0)
+ {
+ unsigned int regno = DF_REF_REGNO (use);
+ bitmap_set_bit (live, regno);
+ /* Notes are not generated for any of the artificial registers
+ at the bottom of the block. */
+ bitmap_set_bit (artificial_uses, regno);
+ }
+
FOR_BB_INSNS_REVERSE (bb, insn)
{
unsigned int uid = INSN_UID (insn);
unsigned int regno;
bitmap_iterator bi;
- struct df_ref *def;
- struct df_ref *use;
-
- if (! INSN_P (insn))
+ struct df_mw_hardreg *mws;
+
+ if (!INSN_P (insn))
continue;
- for (def = DF_INSN_UID_GET (df, uid)->defs; def; def = def->next_ref)
+ if (dflow->flags & DF_RI_LIFE)
{
- unsigned int dregno = DF_REF_REGNO (def);
+ /* Increment the live_length for all of the registers that
+ are are referenced in this block and live at this
+ particular point. */
+ bitmap_iterator bi;
+ unsigned int regno;
+ EXECUTE_IF_SET_IN_BITMAP (local_live, 0, regno, bi)
+ {
+ REG_LIVE_LENGTH (regno)++;
+ }
+ luid++;
+ }
+
+ bitmap_clear (do_not_gen);
+ df_kill_notes (insn, dflow->flags);
+
+ /* Process the defs. */
+ if (CALL_P (insn))
+ {
+ if (dflow->flags & DF_RI_LIFE)
+ {
+ bool can_throw = can_throw_internal (insn);
+ bool set_jump = (find_reg_note (insn, REG_SETJMP, NULL) != NULL);
+ EXECUTE_IF_SET_IN_BITMAP (live, 0, regno, bi)
+ {
+ REG_N_CALLS_CROSSED (regno)++;
+ if (can_throw)
+ REG_N_THROWING_CALLS_CROSSED (regno)++;
+
+ /* We have a problem with any pseudoreg that lives
+ across the setjmp. ANSI says that if a user
+ variable does not change in value between the
+ setjmp and the longjmp, then the longjmp
+ preserves it. This includes longjmp from a place
+ where the pseudo appears dead. (In principle,
+ the value still exists if it is in scope.) If
+ the pseudo goes in a hard reg, some other value
+ may occupy that hard reg where this pseudo is
+ dead, thus clobbering the pseudo. Conclusion:
+ such a pseudo must not go in a hard reg. */
+ if (set_jump && regno >= FIRST_PSEUDO_REGISTER)
+ bitmap_set_bit (setjumps_crossed, regno);
+ }
+ }
+
+ /* We only care about real sets for calls. Clobbers only
+ may clobber and cannot be depended on. */
+ for (mws = DF_INSN_UID_MWS (df, uid); mws; mws = mws->next)
+ {
+ if ((mws->type == DF_REF_REG_DEF)
+ && !df_ignore_stack_reg (REGNO (mws->mw_reg)))
+ df_set_unused_notes_for_mw (insn, mws, live, do_not_gen,
+ artificial_uses, dflow->flags);
+ }
+
+ /* All of the defs except the return value are some sort of
+ clobber. This code is for the return. */
+ for (def = DF_INSN_UID_DEFS (df, uid); def; def = def->next_ref)
+ if (!(DF_REF_FLAGS (def) & (DF_REF_MUST_CLOBBER | DF_REF_MAY_CLOBBER)))
+ df_create_unused_note (bb, insn, def, live, do_not_gen,
+ artificial_uses, local_live,
+ local_processed, dflow->flags, luid);
- /* Kill this register. */
- bitmap_clear_bit (live, dregno);
+ }
+ else
+ {
+ /* Regular insn. */
+ for (mws = DF_INSN_UID_MWS (df, uid); mws; mws = mws->next)
+ {
+ if (mws->type == DF_REF_REG_DEF)
+ df_set_unused_notes_for_mw (insn, mws, live, do_not_gen,
+ artificial_uses, dflow->flags);
+ }
+
+ for (def = DF_INSN_UID_DEFS (df, uid); def; def = def->next_ref)
+ df_create_unused_note (bb, insn, def, live, do_not_gen,
+ artificial_uses, local_live,
+ local_processed, dflow->flags, luid);
+ }
+
+ /* Process the uses. */
+ for (mws = DF_INSN_UID_MWS (df, uid); mws; mws = mws->next)
+ {
+ if ((mws->type != DF_REF_REG_DEF)
+ && !df_ignore_stack_reg (REGNO (mws->mw_reg)))
+ df_set_dead_notes_for_mw (insn, mws, live, do_not_gen,
+ artificial_uses, dflow->flags);
}
- for (use = DF_INSN_UID_GET (df, uid)->uses; use; use = use->next_ref)
+ for (use = DF_INSN_UID_USES (df, uid); use; use = use->next_ref)
{
unsigned int uregno = DF_REF_REGNO (use);
+ if ((dflow->flags & DF_RI_LIFE) && (uregno >= FIRST_PSEUDO_REGISTER))
+ {
+ REG_FREQ (uregno) += REG_FREQ_FROM_BB (bb);
+ if (REG_BASIC_BLOCK (uregno) == REG_BLOCK_UNKNOWN)
+ REG_BASIC_BLOCK (uregno) = bb->index;
+ else if (REG_BASIC_BLOCK (uregno) != bb->index)
+ REG_BASIC_BLOCK (uregno) = REG_BLOCK_GLOBAL;
+ }
+
+#ifdef REG_DEAD_DEBUGGING
+ fprintf (stderr, " regular looking at use ");
+ df_ref_debug (use, stderr);
+#endif
if (!bitmap_bit_p (live, uregno))
{
- use->flags |= DF_REF_DIES_AFTER_THIS_USE;
+ if ( (!(DF_REF_FLAGS (use) & DF_REF_MW_HARDREG))
+ && (!bitmap_bit_p (do_not_gen, uregno))
+ && (!bitmap_bit_p (artificial_uses, uregno))
+ && (!(DF_REF_FLAGS (use) & DF_REF_READ_WRITE))
+ && (!df_ignore_stack_reg (uregno)))
+ {
+ rtx reg = GET_CODE (*DF_REF_LOC (use)) == SUBREG ?
+ SUBREG_REG (*DF_REF_LOC (use)) : *DF_REF_LOC (use);
+ rtx note = alloc_EXPR_LIST (REG_DEAD, reg, REG_NOTES (insn));
+ REG_NOTES (insn) = note;
+ if (dflow->flags & DF_RI_LIFE)
+ REG_N_DEATHS (uregno)++;
+
+#ifdef REG_DEAD_DEBUGGING
+ print_note ("adding 4: ", insn, note);
+#endif
+ }
/* This register is now live. */
bitmap_set_bit (live, uregno);
+
+ if (dflow->flags & DF_RI_LIFE)
+ {
+ /* If we have seen this regno, then it has already
+ been processed correctly with the per insn
+ increment. If we have not seen it we set the bit
+ so that begins to get processed locally. Note
+ that we don't even get here if the variable was
+ live at the end of the block since just a ref
+ inside the block does not effect the
+ calculations. */
+ REG_LIVE_LENGTH (uregno) ++;
+ bitmap_set_bit (local_live, uregno);
+ bitmap_set_bit (local_processed, uregno);
+ }
}
- else
- use->flags &= ~DF_REF_DIES_AFTER_THIS_USE;
}
-
- /* Increment lifetimes of all live registers. */
+ }
+
+ if (dflow->flags & DF_RI_LIFE)
+ {
+ /* Add the length of the block to all of the registers that were
+ not referenced, but still live in this block. */
+ bitmap_iterator bi;
+ unsigned int regno;
+ bitmap_and_compl_into (live, local_processed);
EXECUTE_IF_SET_IN_BITMAP (live, 0, regno, bi)
{
- problem_data->lifetime[regno]++;
+ REG_LIVE_LENGTH (regno) += luid;
}
+ bitmap_clear (local_processed);
+ bitmap_clear (local_live);
}
}
{
unsigned int bb_index;
bitmap_iterator bi;
- bitmap live;
+ bitmap live = BITMAP_ALLOC (NULL);
+ bitmap do_not_gen = BITMAP_ALLOC (NULL);
+ bitmap artificial_uses = BITMAP_ALLOC (NULL);
+ bitmap local_live = NULL;
+ bitmap local_processed = NULL;
+ bitmap setjumps_crossed = NULL;
+
+ if (dflow->flags & DF_RI_LIFE)
+ {
+ local_live = BITMAP_ALLOC (NULL);
+ local_processed = BITMAP_ALLOC (NULL);
+ setjumps_crossed = BITMAP_ALLOC (NULL);
+ }
- live = BITMAP_ALLOC (NULL);
+
+#ifdef REG_DEAD_DEBUGGING
+ df_lr_dump (dflow->df->problems_by_index [DF_LR], stderr);
+ print_rtl_with_bb (stderr, get_insns());
+#endif
EXECUTE_IF_SET_IN_BITMAP (blocks_to_scan, 0, bb_index, bi)
{
- df_ri_bb_compute (dflow, bb_index, live);
+ df_ri_bb_compute (dflow, bb_index, live, do_not_gen, artificial_uses,
+ local_live, local_processed, setjumps_crossed);
}
BITMAP_FREE (live);
+ BITMAP_FREE (do_not_gen);
+ BITMAP_FREE (artificial_uses);
+ if (dflow->flags & DF_RI_LIFE)
+ {
+ bitmap_iterator bi;
+ unsigned int regno;
+ /* See the setjump comment in df_ri_bb_compute. */
+ EXECUTE_IF_SET_IN_BITMAP (setjumps_crossed, 0, regno, bi)
+ {
+ REG_BASIC_BLOCK (regno) = REG_BLOCK_UNKNOWN;
+ REG_LIVE_LENGTH (regno) = -1;
+ }
+
+ BITMAP_FREE (local_live);
+ BITMAP_FREE (local_processed);
+ BITMAP_FREE (setjumps_crossed);
+ }
}
static void
df_ri_free (struct dataflow *dflow)
{
- struct df_ri_problem_data *problem_data =
- (struct df_ri_problem_data *) dflow->problem_data;
-
- free (problem_data->lifetime);
free (dflow->problem_data);
free (dflow);
}
static void
df_ri_dump (struct dataflow *dflow, FILE *file)
{
- struct df_ri_problem_data *problem_data =
- (struct df_ri_problem_data *) dflow->problem_data;
- int j;
+ print_rtl_with_bb (file, get_insns ());
- fprintf (file, "Register info:\n");
- for (j = 0; j < max_reg_num (); j++)
+ if (dflow->flags & DF_RI_LIFE)
{
- fprintf (file, "reg %d life %d\n", j, problem_data->lifetime[j]);
+ fprintf (file, "Register info:\n");
+ dump_flow_info (file, -1);
}
}
NULL, /* Finalize function. */
df_ri_free, /* Free all of the problem information. */
df_ri_dump, /* Debugging. */
- &problem_UR /* Dependent problem. */
+
+ /* Technically this is only dependent on the live registers problem
+ but it will produce infomation if built one of uninitialized
+ register problems (UR, UREC) is also run. */
+ df_lr_add_problem, /* Dependent problem. */
+ 0 /* Changeable flags. */
};
solution. */
struct dataflow *
-df_ri_add_problem (struct df *df)
+df_ri_add_problem (struct df *df, int flags)
{
- return df_add_problem (df, &problem_RI);
+ return df_add_problem (df, &problem_RI, flags);
}
-
-
-/* Return total lifetime (in insns) of REG. */
-int
-df_reg_lifetime (struct df *df, rtx reg)
-{
- struct dataflow *dflow = df->problems_by_index[DF_RI];
- struct df_ri_problem_data *problem_data =
- (struct df_ri_problem_data *) dflow->problem_data;
- return problem_data->lifetime[REGNO (reg)];
-}
-
-
#define EPILOGUE_USES(REGNO) 0
#endif
-/* Indicates where we are in the compilation. */
-int df_state;
-
/* The bitmap_obstack is used to hold some static variables that
should not be reset after each function is compiled. */
alloc_pool ref_pool;
alloc_pool insn_pool;
alloc_pool reg_pool;
+ alloc_pool mw_reg_pool;
+ alloc_pool mw_link_pool;
};
typedef struct df_scan_bb_info *df_scan_bb_info_t;
df_scan_free_internal (struct dataflow *dflow)
{
struct df *df = dflow->df;
- struct df_scan_problem_data *problem_data =
- (struct df_scan_problem_data *) dflow->problem_data;
+ struct df_scan_problem_data *problem_data
+ = (struct df_scan_problem_data *) dflow->problem_data;
free (df->def_info.regs);
free (df->def_info.refs);
free_alloc_pool (problem_data->ref_pool);
free_alloc_pool (problem_data->insn_pool);
free_alloc_pool (problem_data->reg_pool);
+ free_alloc_pool (problem_data->mw_reg_pool);
+ free_alloc_pool (problem_data->mw_link_pool);
}
be rescanned. */
static void
-df_scan_alloc (struct dataflow *dflow, bitmap blocks_to_rescan)
+df_scan_alloc (struct dataflow *dflow, bitmap blocks_to_rescan,
+ bitmap all_blocks ATTRIBUTE_UNUSED)
{
struct df *df = dflow->df;
struct df_scan_problem_data *problem_data;
problem_data->reg_pool
= create_alloc_pool ("df_scan_reg pool",
sizeof (struct df_reg_info), block_size);
+ problem_data->mw_reg_pool
+ = create_alloc_pool ("df_scan_mw_reg pool",
+ sizeof (struct df_mw_hardreg), block_size);
+ problem_data->mw_link_pool
+ = create_alloc_pool ("df_scan_mw_link pool",
+ sizeof (struct df_link), block_size);
insn_num += insn_num / 4;
df_grow_reg_info (dflow, &df->def_info);
NULL, /* Finalize function. */
df_scan_free, /* Free all of the problem information. */
df_scan_dump, /* Debugging. */
- NULL /* Dependent problem. */
+ NULL, /* Dependent problem. */
+ 0 /* Changeable flags. */
};
solution. */
struct dataflow *
-df_scan_add_problem (struct df *df)
+df_scan_add_problem (struct df *df, int flags)
{
- return df_add_problem (df, &problem_SCAN);
+ return df_add_problem (df, &problem_SCAN, flags);
}
/*----------------------------------------------------------------------------
{
unsigned int max_reg = max_reg_num ();
unsigned int new_size = max_reg;
- struct df_scan_problem_data *problem_data =
- (struct df_scan_problem_data *) dflow->problem_data;
+ struct df_scan_problem_data *problem_data
+ = (struct df_scan_problem_data *) dflow->problem_data;
unsigned int i;
if (ref_info->regs_size < new_size)
if (blocks)
{
int i;
+ unsigned int bb_index;
+ bitmap_iterator bi;
+ bool cleared_bits = false;
/* Need to assure that there are space in all of the tables. */
unsigned int insn_num = get_max_uid () + 1;
df_grow_bb_info (dflow);
bitmap_copy (local_blocks_to_scan, blocks);
+
+ EXECUTE_IF_SET_IN_BITMAP (blocks, 0, bb_index, bi)
+ {
+ basic_block bb = BASIC_BLOCK (bb_index);
+ if (!bb)
+ {
+ bitmap_clear_bit (local_blocks_to_scan, bb_index);
+ cleared_bits = true;
+ }
+ }
+
+ if (cleared_bits)
+ bitmap_copy (blocks, local_blocks_to_scan);
+
df->def_info.add_refs_inline = true;
df->use_info.add_refs_inline = true;
{
bitmap_set_bit (local_blocks_to_scan, bb->index);
}
- df_scan_alloc (dflow, local_blocks_to_scan);
+ df_scan_alloc (dflow, local_blocks_to_scan, NULL);
df->def_info.add_refs_inline = false;
df->use_info.add_refs_inline = false;
BITMAP_FREE (local_blocks_to_scan);
}
+
/* Create a new ref of type DF_REF_TYPE for register REG at address
LOC within INSN of BB. */
struct df *df = dflow->df;
struct df_ref *next = DF_REF_NEXT_REG (ref);
struct df_ref *prev = DF_REF_PREV_REG (ref);
- struct df_scan_problem_data *problem_data =
- (struct df_scan_problem_data *) dflow->problem_data;
+ struct df_scan_problem_data *problem_data
+ = (struct df_scan_problem_data *) dflow->problem_data;
struct df_reg_info *reg_info;
struct df_ref *next_ref = ref->next_ref;
unsigned int id = DF_REF_ID (ref);
= df_ref_unlink (bb_info->artificial_defs, ref);
}
else
- DF_INSN_UID_DEFS (df, DF_REF_INSN_UID (ref)) =
- df_ref_unlink (DF_INSN_UID_DEFS (df, DF_REF_INSN_UID (ref)), ref);
+ DF_INSN_UID_DEFS (df, DF_REF_INSN_UID (ref))
+ = df_ref_unlink (DF_INSN_UID_DEFS (df, DF_REF_INSN_UID (ref)), ref);
if (df->def_info.add_refs_inline)
DF_DEFS_SET (df, DF_REF_ID (ref), NULL);
= df_ref_unlink (bb_info->artificial_uses, ref);
}
else
- DF_INSN_UID_USES (df, DF_REF_INSN_UID (ref)) =
- df_ref_unlink (DF_INSN_UID_USES (df, DF_REF_INSN_UID (ref)), ref);
+ DF_INSN_UID_USES (df, DF_REF_INSN_UID (ref))
+ = df_ref_unlink (DF_INSN_UID_USES (df, DF_REF_INSN_UID (ref)), ref);
if (df->use_info.add_refs_inline)
DF_USES_SET (df, DF_REF_ID (ref), NULL);
df_insn_create_insn_record (struct dataflow *dflow, rtx insn)
{
struct df *df = dflow->df;
- struct df_scan_problem_data *problem_data =
- (struct df_scan_problem_data *) dflow->problem_data;
+ struct df_scan_problem_data *problem_data
+ = (struct df_scan_problem_data *) dflow->problem_data;
struct df_insn_info *insn_rec = DF_INSN_GET (df, insn);
if (!insn_rec)
unsigned int uid = INSN_UID (insn);
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;
+ 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)
{
+ struct df_mw_hardreg *hardregs = insn_info->mw_hardregs;
+
+ while (hardregs)
+ {
+ struct df_mw_hardreg *next_hr = hardregs->next;
+ struct df_link *link = hardregs->regs;
+ while (link)
+ {
+ struct df_link *next_l = link->next;
+ pool_free (problem_data->mw_link_pool, link);
+ link = next_l;
+ }
+
+ pool_free (problem_data->mw_reg_pool, hardregs);
+ hardregs = next_hr;
+ }
+
ref = insn_info->defs;
while (ref)
ref = df_reg_chain_unlink (dflow, ref);
}
\f
-/* Local miscellaneous routines. */
-
-/* Local routines for recording refs. */
-
-/* Set where we are in the compilation. */
-
-void
-df_set_state (int state)
-{
- df_state = state;
-}
-
-
-\f
/*----------------------------------------------------------------------------
Hard core instruction scanning code. No external interfaces here,
just a lot of routines that look inside insns.
struct df_ref *this_ref;
struct df *df = dflow->df;
int regno = REGNO (GET_CODE (reg) == SUBREG ? SUBREG_REG (reg) : reg);
- struct df_scan_problem_data *problem_data =
- (struct df_scan_problem_data *) dflow->problem_data;
+ struct df_scan_problem_data *problem_data
+ = (struct df_scan_problem_data *) dflow->problem_data;
this_ref = pool_alloc (problem_data->ref_pool);
DF_REF_REG (this_ref) = reg;
/* Link the ref into the reg_def and reg_use chains and keep a count
of the instances. */
- if (ref_type == DF_REF_REG_DEF)
+ switch (ref_type)
{
- struct df_reg_info *reg_info = DF_REG_DEF_GET (df, regno);
- reg_info->n_refs++;
-
- /* Add the ref to the reg_def chain. */
- df_reg_chain_create (reg_info, this_ref);
- DF_REF_ID (this_ref) = df->def_info.bitmap_size;
- if (df->def_info.add_refs_inline)
- {
- if (DF_DEFS_SIZE (df) >= df->def_info.refs_size)
- {
- int new_size = df->def_info.bitmap_size
- + df->def_info.bitmap_size / 4;
- df_grow_ref_info (&df->def_info, new_size);
- }
- /* Add the ref to the big array of defs. */
- DF_DEFS_SET (df, df->def_info.bitmap_size, this_ref);
- df->def_info.refs_organized = false;
- }
-
- df->def_info.bitmap_size++;
+ case DF_REF_REG_DEF:
+ {
+ struct df_reg_info *reg_info = DF_REG_DEF_GET (df, regno);
+ reg_info->n_refs++;
+
+ /* Add the ref to the reg_def chain. */
+ df_reg_chain_create (reg_info, this_ref);
+ DF_REF_ID (this_ref) = df->def_info.bitmap_size;
+ if (df->def_info.add_refs_inline)
+ {
+ if (DF_DEFS_SIZE (df) >= df->def_info.refs_size)
+ {
+ int new_size = df->def_info.bitmap_size
+ + df->def_info.bitmap_size / 4;
+ df_grow_ref_info (&df->def_info, new_size);
+ }
+ /* Add the ref to the big array of defs. */
+ DF_DEFS_SET (df, df->def_info.bitmap_size, this_ref);
+ df->def_info.refs_organized = false;
+ }
+
+ df->def_info.bitmap_size++;
+
+ if (DF_REF_FLAGS (this_ref) & DF_REF_ARTIFICIAL)
+ {
+ struct df_scan_bb_info *bb_info
+ = df_scan_get_bb_info (dflow, bb->index);
+ this_ref->next_ref = bb_info->artificial_defs;
+ bb_info->artificial_defs = this_ref;
+ }
+ else
+ {
+ this_ref->next_ref = DF_INSN_GET (df, insn)->defs;
+ DF_INSN_GET (df, insn)->defs = this_ref;
+ }
+ }
+ break;
- if (DF_REF_FLAGS (this_ref) & DF_REF_ARTIFICIAL)
- {
- struct df_scan_bb_info *bb_info
- = df_scan_get_bb_info (dflow, bb->index);
- this_ref->next_ref = bb_info->artificial_defs;
- bb_info->artificial_defs = this_ref;
- }
- else
- {
- this_ref->next_ref = DF_INSN_GET (df, insn)->defs;
- DF_INSN_GET (df, insn)->defs = this_ref;
- }
- }
- else
- {
- struct df_reg_info *reg_info = DF_REG_USE_GET (df, regno);
- reg_info->n_refs++;
+ case DF_REF_REG_MEM_LOAD:
+ case DF_REF_REG_MEM_STORE:
+ case DF_REF_REG_USE:
+ {
+ struct df_reg_info *reg_info = DF_REG_USE_GET (df, regno);
+ reg_info->n_refs++;
+
+ /* Add the ref to the reg_use chain. */
+ df_reg_chain_create (reg_info, this_ref);
+ DF_REF_ID (this_ref) = df->use_info.bitmap_size;
+ if (df->use_info.add_refs_inline)
+ {
+ if (DF_USES_SIZE (df) >= df->use_info.refs_size)
+ {
+ int new_size = df->use_info.bitmap_size
+ + df->use_info.bitmap_size / 4;
+ df_grow_ref_info (&df->use_info, new_size);
+ }
+ /* Add the ref to the big array of defs. */
+ DF_USES_SET (df, df->use_info.bitmap_size, this_ref);
+ df->use_info.refs_organized = false;
+ }
+
+ df->use_info.bitmap_size++;
+ if (DF_REF_FLAGS (this_ref) & DF_REF_ARTIFICIAL)
+ {
+ struct df_scan_bb_info *bb_info
+ = df_scan_get_bb_info (dflow, bb->index);
+ this_ref->next_ref = bb_info->artificial_uses;
+ bb_info->artificial_uses = this_ref;
+ }
+ else
+ {
+ this_ref->next_ref = DF_INSN_GET (df, insn)->uses;
+ DF_INSN_GET (df, insn)->uses = this_ref;
+ }
+ }
+ break;
- /* Add the ref to the reg_use chain. */
- df_reg_chain_create (reg_info, this_ref);
- DF_REF_ID (this_ref) = df->use_info.bitmap_size;
- if (df->use_info.add_refs_inline)
- {
- if (DF_USES_SIZE (df) >= df->use_info.refs_size)
- {
- int new_size = df->use_info.bitmap_size
- + df->use_info.bitmap_size / 4;
- df_grow_ref_info (&df->use_info, new_size);
- }
- /* Add the ref to the big array of defs. */
- DF_USES_SET (df, df->use_info.bitmap_size, this_ref);
- df->use_info.refs_organized = false;
- }
+ default:
+ gcc_unreachable ();
- df->use_info.bitmap_size++;
- if (DF_REF_FLAGS (this_ref) & DF_REF_ARTIFICIAL)
- {
- struct df_scan_bb_info *bb_info
- = df_scan_get_bb_info (dflow, bb->index);
- this_ref->next_ref = bb_info->artificial_uses;
- bb_info->artificial_uses = this_ref;
- }
- else
- {
- this_ref->next_ref = DF_INSN_GET (df, insn)->uses;
- DF_INSN_GET (df, insn)->uses = this_ref;
- }
}
return this_ref;
}
enum df_ref_flags ref_flags,
bool record_live)
{
- unsigned int regno;
struct df *df = dflow->df;
+ rtx oldreg = reg;
+ unsigned int regno;
gcc_assert (REG_P (reg) || GET_CODE (reg) == SUBREG);
reg. As written in the docu those should have the form
(subreg:SI (reg:M A) N), with size(SImode) > size(Mmode).
XXX Is that true? We could also use the global word_mode variable. */
- if ((df->flags & DF_SUBREGS) == 0
+ if ((dflow->flags & DF_SUBREGS) == 0
&& GET_CODE (reg) == SUBREG
&& (GET_MODE_SIZE (GET_MODE (reg)) < GET_MODE_SIZE (word_mode)
|| GET_MODE_SIZE (GET_MODE (reg))
regno = REGNO (GET_CODE (reg) == SUBREG ? SUBREG_REG (reg) : reg);
if (regno < FIRST_PSEUDO_REGISTER)
{
- int i;
- int endregno;
+ unsigned int i;
+ unsigned int endregno;
+ struct df_mw_hardreg *hardreg = NULL;
+ struct df_scan_problem_data *problem_data
+ = (struct df_scan_problem_data *) dflow->problem_data;
- if (! (df->flags & DF_HARD_REGS))
+ if (!(dflow->flags & DF_HARD_REGS))
return;
/* GET_MODE (reg) is correct here. We do not want to go into a SUBREG
SUBREG_BYTE (reg), GET_MODE (reg));
endregno += regno;
+ /* If this is a multiword hardreg, we create some extra datastructures that
+ will enable us to easily build REG_DEAD and REG_UNUSED notes. */
+ if ((endregno != regno + 1) && insn)
+ {
+ struct df_insn_info *insn_info = DF_INSN_GET (df, insn);
+ /* Sets to a subreg of a multiword register are partial.
+ Sets to a non-subreg of a multiword register are not. */
+ if (GET_CODE (oldreg) == SUBREG)
+ ref_flags |= DF_REF_PARTIAL;
+ ref_flags |= DF_REF_MW_HARDREG;
+ hardreg = pool_alloc (problem_data->mw_reg_pool);
+ hardreg->next = insn_info->mw_hardregs;
+ insn_info->mw_hardregs = hardreg;
+ hardreg->type = ref_type;
+ hardreg->flags = ref_flags;
+ hardreg->mw_reg = reg;
+ hardreg->regs = NULL;
+
+ }
+
for (i = regno; i < endregno; i++)
{
+ struct df_ref *ref;
+
/* Calls are handled at call site because regs_ever_live
doesn't include clobbered regs, only used ones. */
if (ref_type == DF_REF_REG_DEF && record_live)
{
/* Set regs_ever_live on uses of non-eliminable frame
pointers and arg pointers. */
- if (! (TEST_HARD_REG_BIT (elim_reg_set, regno)
+ if (!(TEST_HARD_REG_BIT (elim_reg_set, regno)
&& (regno == FRAME_POINTER_REGNUM
|| regno == ARG_POINTER_REGNUM)))
regs_ever_live[i] = 1;
}
- df_ref_create_structure (dflow, regno_reg_rtx[i], loc,
- bb, insn, ref_type, ref_flags);
+ ref = df_ref_create_structure (dflow, regno_reg_rtx[i], loc,
+ bb, insn, ref_type, ref_flags);
+ if (hardreg)
+ {
+ struct df_link *link = pool_alloc (problem_data->mw_link_pool);
+
+ link->next = hardreg->regs;
+ link->ref = ref;
+ hardreg->regs = link;
+ }
}
}
else
{
rtx *loc;
rtx dst;
+ bool dst_in_strict_lowpart = false;
/* We may recursively call ourselves on EXPR_LIST when dealing with PARALLEL
construct. */
if (GET_CODE (temp) == EXPR_LIST || GET_CODE (temp) == CLOBBER
|| GET_CODE (temp) == SET)
df_def_record_1 (dflow, temp, bb, insn,
- GET_CODE (temp) == CLOBBER ? flags | DF_REF_CLOBBER : flags,
+ GET_CODE (temp) == CLOBBER
+ ? flags | DF_REF_MUST_CLOBBER : flags,
record_live);
}
return;
}
#endif
loc = &XEXP (dst, 0);
+ if (GET_CODE (dst) == STRICT_LOW_PART)
+ dst_in_strict_lowpart = true;
dst = *loc;
flags |= DF_REF_READ_WRITE;
+
}
+ /* Sets to a subreg of a single word register are partial sets if
+ they are wrapped in a strict lowpart, and not partial otherwise.
+ */
+ if (GET_CODE (dst) == SUBREG && REG_P (SUBREG_REG (dst))
+ && dst_in_strict_lowpart)
+ flags |= DF_REF_PARTIAL;
+
if (REG_P (dst)
|| (GET_CODE (dst) == SUBREG && REG_P (SUBREG_REG (dst))))
df_ref_record (dflow, dst, loc, bb, insn,
{
/* Mark the single def within the pattern. */
df_def_record_1 (dflow, x, bb, insn,
- code == CLOBBER ? DF_REF_CLOBBER : 0, true);
+ code == CLOBBER ? DF_REF_MUST_CLOBBER : 0, true);
}
else if (code == COND_EXEC)
{
case SUBREG:
/* While we're here, optimize this case. */
-
+ flags |= DF_REF_PARTIAL;
/* In case the SUBREG is not of a REG, do not optimize. */
if (!REG_P (SUBREG_REG (x)))
{
static void
df_insn_refs_record (struct dataflow *dflow, basic_block bb, rtx insn)
{
- int i;
struct df *df = dflow->df;
+ int i;
if (INSN_P (insn))
{
/* Record register defs. */
df_defs_record (dflow, PATTERN (insn), bb, insn);
- if (df->flags & DF_EQUIV_NOTES)
+ if (dflow->flags & DF_EQUIV_NOTES)
for (note = REG_NOTES (insn); note;
note = XEXP (note, 1))
{
DF_REF_REG_USE, bb, insn,
0);
- if (df->flags & DF_HARD_REGS)
+ if (dflow->flags & DF_HARD_REGS)
{
bitmap_iterator bi;
unsigned int ui;
DF_REF_REG_USE, bb, insn,
0);
EXECUTE_IF_SET_IN_BITMAP (df_invalidated_by_call, 0, ui, bi)
- df_ref_record (dflow, regno_reg_rtx[ui], ®no_reg_rtx[ui], bb, insn,
- DF_REF_REG_DEF, DF_REF_CLOBBER, false);
+ df_ref_record (dflow, regno_reg_rtx[ui], ®no_reg_rtx[ui], bb,
+ insn, DF_REF_REG_DEF, DF_REF_MAY_CLOBBER, false);
}
}
rtx insn;
int luid = 0;
struct df_scan_bb_info *bb_info = df_scan_get_bb_info (dflow, bb->index);
+ bitmap artificial_uses_at_bottom = NULL;
+
+ if (dflow->flags & DF_HARD_REGS)
+ artificial_uses_at_bottom = BITMAP_ALLOC (NULL);
/* Need to make sure that there is a record in the basic block info. */
if (!bb_info)
}
#ifdef EH_RETURN_DATA_REGNO
- if ((df->flags & DF_HARD_REGS)
+ if ((dflow->flags & DF_HARD_REGS)
&& df_has_eh_preds (bb))
{
unsigned int i;
#endif
- if ((df->flags & DF_HARD_REGS)
+ if ((dflow->flags & DF_HARD_REGS)
&& df_has_eh_preds (bb))
{
#ifdef EH_USES
{
if (frame_pointer_needed)
{
- df_uses_record (dflow, ®no_reg_rtx[FRAME_POINTER_REGNUM],
- DF_REF_REG_USE, bb, NULL, DF_REF_ARTIFICIAL);
+ bitmap_set_bit (artificial_uses_at_bottom, FRAME_POINTER_REGNUM);
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
- df_uses_record (dflow, ®no_reg_rtx[HARD_FRAME_POINTER_REGNUM],
- DF_REF_REG_USE, bb, NULL, DF_REF_ARTIFICIAL);
+ bitmap_set_bit (artificial_uses_at_bottom, HARD_FRAME_POINTER_REGNUM);
#endif
}
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
if (fixed_regs[ARG_POINTER_REGNUM])
- df_uses_record (dflow, ®no_reg_rtx[ARG_POINTER_REGNUM],
- DF_REF_REG_USE, bb, NULL,
- DF_REF_ARTIFICIAL);
+ bitmap_set_bit (artificial_uses_at_bottom, ARG_POINTER_REGNUM);
#endif
}
}
- if ((df->flags & DF_HARD_REGS)
+ if ((dflow->flags & DF_HARD_REGS)
&& bb->index >= NUM_FIXED_BLOCKS)
{
/* Before reload, there are a few registers that must be forced
live everywhere -- which might not already be the case for
blocks within infinite loops. */
- if (! reload_completed)
+ if (!reload_completed)
{
/* Any reference to any pseudo before reload is a potential
reference of the frame pointer. */
- df_uses_record (dflow, ®no_reg_rtx[FRAME_POINTER_REGNUM],
- DF_REF_REG_USE, bb, NULL, DF_REF_ARTIFICIAL);
+ bitmap_set_bit (artificial_uses_at_bottom, FRAME_POINTER_REGNUM);
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
/* Pseudos with argument area equivalences may require
reloading via the argument pointer. */
if (fixed_regs[ARG_POINTER_REGNUM])
- df_uses_record (dflow, ®no_reg_rtx[ARG_POINTER_REGNUM],
- DF_REF_REG_USE, bb, NULL,
- DF_REF_ARTIFICIAL);
+ bitmap_set_bit (artificial_uses_at_bottom, ARG_POINTER_REGNUM);
#endif
/* Any constant, or pseudo with constant equivalences, may
require reloading from memory using the pic register. */
if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM
&& fixed_regs[PIC_OFFSET_TABLE_REGNUM])
- df_uses_record (dflow, ®no_reg_rtx[PIC_OFFSET_TABLE_REGNUM],
- DF_REF_REG_USE, bb, NULL,
- DF_REF_ARTIFICIAL);
+ bitmap_set_bit (artificial_uses_at_bottom, PIC_OFFSET_TABLE_REGNUM);
}
/* The all-important stack pointer must always be live. */
- df_uses_record (dflow, ®no_reg_rtx[STACK_POINTER_REGNUM],
- DF_REF_REG_USE, bb, NULL, DF_REF_ARTIFICIAL);
+ bitmap_set_bit (artificial_uses_at_bottom, STACK_POINTER_REGNUM);
+ }
+
+ if (dflow->flags & DF_HARD_REGS)
+ {
+ bitmap_iterator bi;
+ unsigned int regno;
+
+ EXECUTE_IF_SET_IN_BITMAP (artificial_uses_at_bottom, 0, regno, bi)
+ {
+ df_uses_record (dflow, ®no_reg_rtx[regno],
+ DF_REF_REG_USE, bb, NULL, DF_REF_ARTIFICIAL);
+ }
+
+ BITMAP_FREE (artificial_uses_at_bottom);
}
}
entry to the function. */
static void
-df_record_entry_block_defs (struct dataflow * dflow)
+df_record_entry_block_defs (struct dataflow *dflow)
{
unsigned int i;
bitmap_iterator bi;
rtx r;
- struct df * df = dflow->df;
+ struct df *df = dflow->df;
bitmap_clear (df->entry_block_defs);
- if (! (df->flags & DF_HARD_REGS))
+ if (!(dflow->flags & DF_HARD_REGS))
return;
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
}
else
{
+ /* The always important stack pointer. */
+ bitmap_set_bit (df->entry_block_defs, STACK_POINTER_REGNUM);
+
#ifdef INCOMING_RETURN_ADDR_RTX
if (REG_P (INCOMING_RETURN_ADDR_RTX))
bitmap_set_bit (df->entry_block_defs, REGNO (INCOMING_RETURN_ADDR_RTX));
bitmap_set_bit (df->entry_block_defs, REGNO (r));
}
- /* These registers are live everywhere. */
- if (!reload_completed)
+ if ((!reload_completed) || frame_pointer_needed)
{
/* Any reference to any pseudo before reload is a potential
reference of the frame pointer. */
bitmap_set_bit (df->entry_block_defs, FRAME_POINTER_REGNUM);
+#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
+ /* If they are different, also mark the hard frame pointer as live. */
+ if (!LOCAL_REGNO (HARD_FRAME_POINTER_REGNUM))
+ bitmap_set_bit (df->entry_block_defs, HARD_FRAME_POINTER_REGNUM);
+#endif
+ }
+ /* These registers are live everywhere. */
+ if (!reload_completed)
+ {
#ifdef EH_USES
/* The ia-64, the only machine that uses this, does not define these
until after reload. */
bitmap_clear (df->exit_block_uses);
- if (! (df->flags & DF_HARD_REGS))
+ if (!(dflow->flags & DF_HARD_REGS))
return;
/* If exiting needs the right stack value, consider the stack
pointer live at the end of the function. */
if ((HAVE_epilogue && epilogue_completed)
- || ! EXIT_IGNORE_STACK
- || (! FRAME_POINTER_REQUIRED
- && ! current_function_calls_alloca
+ || !EXIT_IGNORE_STACK
+ || (!FRAME_POINTER_REQUIRED
+ && !current_function_calls_alloca
&& flag_omit_frame_pointer)
|| current_function_sp_is_unchanging)
{
If we end up eliminating it, it will be removed from the live
list of each basic block by reload. */
- if (! reload_completed || frame_pointer_needed)
+ if ((!reload_completed) || frame_pointer_needed)
{
bitmap_set_bit (df->exit_block_uses, FRAME_POINTER_REGNUM);
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
/* If they are different, also mark the hard frame pointer as live. */
- if (! LOCAL_REGNO (HARD_FRAME_POINTER_REGNUM))
+ if (!LOCAL_REGNO (HARD_FRAME_POINTER_REGNUM))
bitmap_set_bit (df->exit_block_uses, HARD_FRAME_POINTER_REGNUM);
#endif
}
{
/* Mark all call-saved registers that we actually used. */
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- if (regs_ever_live[i] && ! LOCAL_REGNO (i)
- && ! TEST_HARD_REG_BIT (regs_invalidated_by_call, i))
+ if (regs_ever_live[i] && !LOCAL_REGNO (i)
+ && !TEST_HARD_REG_BIT (regs_invalidated_by_call, i))
bitmap_set_bit (df->exit_block_uses, i);
}
#endif
#ifdef EH_RETURN_STACKADJ_RTX
- if ((! HAVE_epilogue || ! epilogue_completed)
+ if ((!HAVE_epilogue || ! epilogue_completed)
&& current_function_calls_eh_return)
{
rtx tmp = EH_RETURN_STACKADJ_RTX;
#endif
#ifdef EH_RETURN_HANDLER_RTX
- if ((! HAVE_epilogue || ! epilogue_completed)
+ if ((!HAVE_epilogue || ! epilogue_completed)
&& current_function_calls_eh_return)
{
rtx tmp = EH_RETURN_HANDLER_RTX;
/* Mark function return value. */
diddle_return_value (df_mark_reg, (void*) df->exit_block_uses);
- if (df->flags & DF_HARD_REGS)
+ if (dflow->flags & DF_HARD_REGS)
EXECUTE_IF_SET_IN_BITMAP (df->exit_block_uses, 0, i, bi)
df_uses_record (dflow, ®no_reg_rtx[i],
DF_REF_REG_USE, EXIT_BLOCK_PTR, NULL,
struct dataflow;
struct df;
struct df_problem;
+struct df_link;
/* Data flow problems. All problems must have a unique here. */
/* Scanning is not really a dataflow problem, but it is useful to have
#define DF_RI 7 /* Register Info. */
#define DF_LAST_PROBLEM_PLUS1 (DF_RI + 1)
-/* Flags that control the building of chains. */
-#define DF_DU_CHAIN 1 /* Build DU chains. */
-#define DF_UD_CHAIN 2 /* Build UD chains. */
-
/* Dataflow direction. */
enum df_flow_dir
DF_BACKWARD
};
+
+/* The first of these is a set of a register. The remaining three are
+ all uses of a register (the mem_load and mem_store relate to how
+ the register as an addressing operand). */
+enum df_ref_type {DF_REF_REG_DEF, DF_REF_REG_USE, DF_REF_REG_MEM_LOAD,
+ DF_REF_REG_MEM_STORE};
+
+#define DF_REF_TYPE_NAMES {"def", "use", "mem load", "mem store"}
+
+enum df_ref_flags
+ {
+ /* Read-modify-write refs generate both a use and a def and
+ these are marked with this flag to show that they are not
+ independent. */
+ DF_REF_READ_WRITE = 1,
+
+ /* This flag is set, if we stripped the subreg from the reference.
+ In this case we must make conservative guesses, at what the
+ outer mode was. */
+ DF_REF_STRIPPED = 2,
+
+ /* If this flag is set, this is not a real definition/use, but an
+ artificial one created to model always live registers, eh uses, etc. */
+ DF_REF_ARTIFICIAL = 4,
+
+
+ /* If this flag is set for an artificial use or def, that ref
+ logically happens at the top of the block. If it is not set
+ for an artificial use or def, that ref logically happens at the
+ bottom of the block. This is never set for regular refs. */
+ DF_REF_AT_TOP = 8,
+
+ /* This flag is set if the use is inside a REG_EQUAL note. */
+ DF_REF_IN_NOTE = 16,
+
+ /* This flag is set if this ref, generally a def, may clobber the
+ referenced register. This is generally only set for hard
+ registers that cross a call site. With better information
+ about calls, some of these could be changed in the future to
+ DF_REF_MUST_CLOBBER. */
+ DF_REF_MAY_CLOBBER = 32,
+
+ /* This flag is set if this ref, generally a def, is a real
+ clobber. This is not currently set for registers live across a
+ call because that clobbering may or may not happen.
+
+ Most of the uses of this are with sets that have a
+ GET_CODE(..)==CLOBBER. Note that this is set even if the
+ clobber is to a subreg. So in order to tell if the clobber
+ wipes out the entire register, it is necessary to also check
+ the DF_REF_PARTIAL flag. */
+ DF_REF_MUST_CLOBBER = 64,
+
+ /* This bit is true if this ref is part of a multiword hardreg. */
+ DF_REF_MW_HARDREG = 128,
+
+ /* This flag is set if this ref is a partial use or def of the
+ associated register. */
+ DF_REF_PARTIAL = 256
+ };
+
+
/* Function prototypes added to df_problem instance. */
/* Allocate the problem specific data. */
-typedef void (*df_alloc_function) (struct dataflow *, bitmap);
+typedef void (*df_alloc_function) (struct dataflow *, bitmap, 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
/* Function to dump results to FILE. */
typedef void (*df_dump_problem_function) (struct dataflow *, FILE *);
+/* Function to add problem a dataflow problem that must be solved
+ before this problem can be solved. */
+typedef struct dataflow * (*df_dependent_problem_function) (struct df *, int);
+
/* The static description of a dataflow problem to solve. See above
typedefs for doc for the function fields. */
df_finalizer_function finalize_fun;
df_free_function free_fun;
df_dump_problem_function dump_fun;
+ df_dependent_problem_function dependent_problem_fun;
- /* A dataflow problem that must be solved before this problem can be
- solved. */
- struct df_problem *dependent_problem;
+ /* Flags can be changed after analysis starts. */
+ int changeable_flags;
};
/* The pool to allocate the block_info from. */
alloc_pool block_pool;
+ /* Problem specific control infomation. */
+
+ /* Scanning flags. */
+#define DF_HARD_REGS 1 /* Mark hard registers. */
+#define DF_EQUIV_NOTES 2 /* Mark uses present in EQUIV/EQUAL notes. */
+#define DF_SUBREGS 4 /* Return subregs rather than the inner reg. */
+ /* Flags that control the building of chains. */
+#define DF_DU_CHAIN 1 /* Build DU chains. */
+#define DF_UD_CHAIN 2 /* Build UD chains. */
+ /* Flag to control the building of register info. */
+#define DF_RI_LIFE 1 /* Build register info. */
+
+ int flags;
+
/* Other problem specific data that is not on a per basic block
basis. The structure is generally defined privately for the
problem. The exception being the scanning problem where it is
void *problem_data;
};
+
+/* The set of multiword hardregs used as operands to this
+ instruction. These are factored into individual uses and defs but
+ the aggregate is still needed to service the REG_DEAD and
+ REG_UNUSED notes. */
+struct df_mw_hardreg
+{
+ rtx mw_reg; /* The multiword hardreg. */
+ enum df_ref_type type; /* Used to see if the ref is read or write. */
+ enum df_ref_flags flags; /* Various flags. */
+ struct df_link *regs; /* The individual regs that make up
+ this hardreg. */
+ struct df_mw_hardreg *next; /* The next mw_hardreg in this insn. */
+};
+
+
/* One of these structures is allocated for every insn. */
struct df_insn_info
{
struct df_ref *defs; /* Head of insn-def chain. */
struct df_ref *uses; /* Head of insn-use chain. */
+ struct df_mw_hardreg *mw_hardregs;
/* ???? The following luid field should be considered private so that
we can change it on the fly to accommodate new insns? */
int luid; /* Logical UID. */
bool contains_asm; /* Contains an asm instruction. */
};
+
/* Two of these structures are allocated for every pseudo reg, one for
the uses and one for the defs. */
struct df_reg_info
unsigned int n_refs; /* Number of refs or defs for this pseudo. */
};
-
-enum df_ref_type {DF_REF_REG_DEF, DF_REF_REG_USE, DF_REF_REG_MEM_LOAD,
- DF_REF_REG_MEM_STORE};
-
-#define DF_REF_TYPE_NAMES {"def", "use", "mem load", "mem store"}
-
-enum df_ref_flags
- {
- /* Read-modify-write refs generate both a use and a def and
- these are marked with this flag to show that they are not
- independent. */
- DF_REF_READ_WRITE = 1,
-
- /* This flag is set, if we stripped the subreg from the reference.
- In this case we must make conservative guesses, at what the
- outer mode was. */
- DF_REF_STRIPPED = 2,
-
- /* If this flag is set, this is not a real definition/use, but an
- artificial one created to model always live registers, eh uses, etc. */
- DF_REF_ARTIFICIAL = 4,
-
-
- /* If this flag is set for an artificial use or def, that ref
- logically happens at the top of the block. If it is not set
- for an artificial use or def, that ref logically happens at the
- bottom of the block. This is never set for regular refs. */
- DF_REF_AT_TOP = 8,
-
- /* This flag is set if the use is inside a REG_EQUAL note. */
- DF_REF_IN_NOTE = 16,
-
- /* This flag is set if this ref is really a clobber, and not a def. */
- DF_REF_CLOBBER = 32,
-
- /* True if ref is dead (i.e. the next ref is a def or clobber or
- the end of the function.) This is only valid the RI problem
- has been set in this df instance. */
- DF_REF_DIES_AFTER_THIS_USE = 64
- };
-
-
/* Define a register reference structure. One of these is allocated
for every register reference (use or def). Note some register
references (e.g., post_inc, subreg) generate both a def and a use. */
void *data; /* The data assigned to it by user. */
};
-/* There are two kinds of links: */
-
-/* This is used for def-use or use-def chains. */
+/* These links are used for two purposes:
+ 1) def-use or use-def chains.
+ 2) Multiword hard registers that underly a single hardware register. */
struct df_link
{
struct df_ref *ref;
struct df
{
-#define DF_HARD_REGS 1 /* Mark hard registers. */
-#define DF_EQUIV_NOTES 2 /* Mark uses present in EQUIV/EQUAL notes. */
-#define DF_SUBREGS 4 /* Return subregs rather than the inner reg. */
-
- int flags; /* Indicates what's recorded. */
-
/* The set of problems to be solved is stored in two arrays. In
PROBLEMS_IN_ORDER, the problems are stored in the order that they
are solved. This is an internally dense array that may have
/* Macros to determine the reference type. */
#define DF_REF_REG_DEF_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_DEF)
-#define DF_REF_REG_USE_P(REF) ((REF) && ! DF_REF_REG_DEF_P (REF))
+#define DF_REF_REG_USE_P(REF) ((REF) && !DF_REF_REG_DEF_P (REF))
#define DF_REF_REG_MEM_STORE_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_MEM_STORE)
#define DF_REF_REG_MEM_LOAD_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_MEM_LOAD)
#define DF_REF_REG_MEM_P(REF) (DF_REF_REG_MEM_STORE_P (REF) \
#define DF_REG_SIZE(DF) ((DF)->def_info.regs_inited)
#define DF_REG_DEF_GET(DF, REG) ((DF)->def_info.regs[(REG)])
#define DF_REG_DEF_SET(DF, REG, VAL) ((DF)->def_info.regs[(REG)]=(VAL))
+#define DF_REG_DEF_COUNT(DF, REG) ((DF)->def_info.regs[(REG)]->n_refs)
#define DF_REG_USE_GET(DF, REG) ((DF)->use_info.regs[(REG)])
#define DF_REG_USE_SET(DF, REG, VAL) ((DF)->use_info.regs[(REG)]=(VAL))
+#define DF_REG_USE_COUNT(DF, REG) ((DF)->use_info.regs[(REG)]->n_refs)
/* Macros to access the elements within the reg_info structure table. */
#define DF_INSN_UID_LUID(DF, INSN) (DF_INSN_UID_GET(DF,INSN)->luid)
#define DF_INSN_UID_DEFS(DF, INSN) (DF_INSN_UID_GET(DF,INSN)->defs)
#define DF_INSN_UID_USES(DF, INSN) (DF_INSN_UID_GET(DF,INSN)->uses)
+#define DF_INSN_UID_MWS(DF, INSN) (DF_INSN_UID_GET(DF,INSN)->mw_hardregs)
/* This is a bitmap copy of regs_invalidated_by_call so that we can
easily add it into bitmaps, etc. */
extern bitmap df_invalidated_by_call;
-/* Initialize ur_in and ur_out as if all hard registers were partially
-available. */
-
-/* The way that registers are processed, especially hard registers,
- changes as the compilation proceeds. These states are passed to
- df_set_state to control this processing. */
-
-#define DF_SCAN_INITIAL 1 /* Processing from beginning of rtl to
- global-alloc. */
-#define DF_SCAN_GLOBAL 2 /* Processing before global
- allocation. */
-#define DF_SCAN_POST_ALLOC 4 /* Processing after register
- allocation. */
-extern int df_state; /* Indicates where we are in the compilation. */
-
/* One of these structures is allocated for every basic block. */
struct df_scan_bb_info
/* Functions defined in df-core.c. */
extern struct df *df_init (int);
-extern struct dataflow *df_add_problem (struct df *, struct df_problem *);
+extern struct dataflow *df_add_problem (struct df *, struct df_problem *, int);
+extern int df_set_flags (struct dataflow *, int);
+extern int df_clear_flags (struct dataflow *, int);
extern void df_set_blocks (struct df*, bitmap);
+extern void df_delete_basic_block (struct df *, int);
extern void df_finish1 (struct df *);
+extern void df_analyze_problem (struct dataflow *, bitmap, bitmap, bitmap, int *, int, bool);
extern void df_analyze (struct df *);
extern void df_compact_blocks (struct df *);
extern void df_bb_replace (struct df *, int, basic_block);
extern bool df_reg_used (struct df *, rtx, rtx);
extern void df_iterative_dataflow (struct dataflow *, bitmap, bitmap, int *, int, bool);
extern void df_dump (struct df *, FILE *);
-extern void df_chain_dump (struct df *, struct df_link *, FILE *);
-extern void df_refs_chain_dump (struct df *, struct df_ref *, bool, FILE *);
+extern void df_refs_chain_dump (struct df_ref *, bool, FILE *);
extern void df_regs_chain_dump (struct df *, struct df_ref *, FILE *);
extern void df_insn_debug (struct df *, rtx, bool, FILE *);
extern void df_insn_debug_regno (struct df *, rtx, FILE *);
extern void df_regno_debug (struct df *, unsigned int, FILE *);
-extern void df_ref_debug (struct df *, struct df_ref *, FILE *);
+extern void df_ref_debug (struct df_ref *, FILE *);
extern void debug_df_insn (rtx);
extern void debug_df_regno (unsigned int);
extern void debug_df_reg (rtx);
/* Functions defined in df-problems.c. */
-extern struct dataflow *df_get_dependent_problem (struct dataflow *);
extern struct df_link *df_chain_create (struct dataflow *, struct df_ref *, struct df_ref *);
extern void df_chain_unlink (struct dataflow *, struct df_ref *, struct df_link *);
extern void df_chain_copy (struct dataflow *, struct df_ref *, struct df_link *);
extern bitmap df_get_live_in (struct df *, basic_block);
extern bitmap df_get_live_out (struct df *, basic_block);
extern void df_grow_bb_info (struct dataflow *);
-extern void df_chain_dump (struct df *, struct df_link *, FILE *);
+extern void df_chain_dump (struct df_link *, FILE *);
extern void df_print_bb_index (basic_block bb, FILE *file);
-extern struct dataflow *df_ru_add_problem (struct df *);
+extern struct dataflow *df_ru_add_problem (struct df *, int);
extern struct df_ru_bb_info *df_ru_get_bb_info (struct dataflow *, unsigned int);
-extern struct dataflow *df_rd_add_problem (struct df *);
+extern struct dataflow *df_rd_add_problem (struct df *, int);
extern struct df_rd_bb_info *df_rd_get_bb_info (struct dataflow *, unsigned int);
-extern struct dataflow *df_lr_add_problem (struct df *);
+extern struct dataflow *df_lr_add_problem (struct df *, int);
extern struct df_lr_bb_info *df_lr_get_bb_info (struct dataflow *, unsigned int);
-extern struct dataflow *df_ur_add_problem (struct df *);
+extern struct dataflow *df_ur_add_problem (struct df *, int);
extern struct df_ur_bb_info *df_ur_get_bb_info (struct dataflow *, unsigned int);
-extern struct dataflow *df_urec_add_problem (struct df *);
+extern struct dataflow *df_urec_add_problem (struct df *, int);
extern struct df_urec_bb_info *df_urec_get_bb_info (struct dataflow *, unsigned int);
-extern struct dataflow *df_chain_add_problem (struct df *, int flags);
-extern struct dataflow *df_ri_add_problem (struct df *);
-extern int df_reg_lifetime (struct df *, rtx reg);
+extern struct dataflow *df_chain_add_problem (struct df *, int);
+extern struct dataflow *df_ri_add_problem (struct df *, int);
/* Functions defined in df-scan.c. */
extern struct df_scan_bb_info *df_scan_get_bb_info (struct dataflow *, unsigned int);
-extern struct dataflow *df_scan_add_problem (struct df *);
+extern struct dataflow *df_scan_add_problem (struct df *, int);
extern void df_rescan_blocks (struct df *, bitmap);
extern struct df_ref *df_ref_create (struct df *, rtx, rtx *, rtx,basic_block,enum df_ref_type, enum df_ref_flags);
extern struct df_ref *df_get_artificial_defs (struct df *, unsigned int);
extern void df_bb_refs_delete (struct dataflow *, int);
extern void df_refs_delete (struct dataflow *, bitmap);
extern void df_reorganize_refs (struct df_ref_info *);
-extern void df_set_state (int);
extern void df_hard_reg_init (void);
extern bool df_read_modify_subreg_p (rtx);
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