/* Standard problems for dataflow support routines.
- Copyright (C) 1999-2014 Free Software Foundation, Inc.
+ Copyright (C) 1999-2020 Free Software Foundation, Inc.
Originally contributed by Michael P. Hayes
(m.hayes@elec.canterbury.ac.nz, mhayes@redhat.com)
Major rewrite contributed by Danny Berlin (dberlin@dberlin.org)
#include "config.h"
#include "system.h"
#include "coretypes.h"
-#include "tm.h"
+#include "backend.h"
+#include "target.h"
#include "rtl.h"
+#include "df.h"
+#include "memmodel.h"
#include "tm_p.h"
#include "insn-config.h"
-#include "recog.h"
-#include "function.h"
-#include "regs.h"
-#include "alloc-pool.h"
-#include "flags.h"
-#include "hard-reg-set.h"
-#include "basic-block.h"
-#include "sbitmap.h"
-#include "bitmap.h"
-#include "target.h"
-#include "timevar.h"
-#include "df.h"
-#include "except.h"
+#include "cfganal.h"
#include "dce.h"
#include "valtrack.h"
#include "dumpfile.h"
#include "rtl-iter.h"
+#include "regs.h"
+#include "function-abi.h"
/* Note that turning REG_DEAD_DEBUGGING on will cause
gcc.c-torture/unsorted/dump-noaddr.c to fail because it prints
these along with the bitmap_clear_range call to remove ranges of
bits without actually generating a knockout vector.
- The kill and sparse_kill and the dense_invalidated_by_call and
- sparse_invalidated_by_call both play this game. */
+ The kill and sparse_kill and the dense_invalidated_by_eh and
+ sparse_invalidated_by_eh both play this game. */
/* Private data used to compute the solution for this problem. These
data structures are not accessible outside of this module. */
-struct df_rd_problem_data
+class df_rd_problem_data
{
- /* The set of defs to regs invalidated by call. */
- bitmap_head sparse_invalidated_by_call;
- /* The set of defs to regs invalidate by call for rd. */
- bitmap_head dense_invalidated_by_call;
+public:
+ /* The set of defs to regs invalidated by EH edges. */
+ bitmap_head sparse_invalidated_by_eh;
+ bitmap_head dense_invalidated_by_eh;
/* An obstack for the bitmaps we need for this problem. */
bitmap_obstack rd_bitmaps;
};
df_rd_free_bb_info (basic_block bb ATTRIBUTE_UNUSED,
void *vbb_info)
{
- struct df_rd_bb_info *bb_info = (struct df_rd_bb_info *) vbb_info;
+ class df_rd_bb_info *bb_info = (class df_rd_bb_info *) vbb_info;
if (bb_info)
{
bitmap_clear (&bb_info->kill);
{
unsigned int bb_index;
bitmap_iterator bi;
- struct df_rd_problem_data *problem_data;
+ class df_rd_problem_data *problem_data;
if (df_rd->problem_data)
{
- problem_data = (struct df_rd_problem_data *) df_rd->problem_data;
- bitmap_clear (&problem_data->sparse_invalidated_by_call);
- bitmap_clear (&problem_data->dense_invalidated_by_call);
+ problem_data = (class df_rd_problem_data *) df_rd->problem_data;
+ bitmap_clear (&problem_data->sparse_invalidated_by_eh);
+ bitmap_clear (&problem_data->dense_invalidated_by_eh);
}
else
{
- problem_data = XNEW (struct df_rd_problem_data);
+ problem_data = XNEW (class df_rd_problem_data);
df_rd->problem_data = problem_data;
bitmap_obstack_initialize (&problem_data->rd_bitmaps);
- bitmap_initialize (&problem_data->sparse_invalidated_by_call,
+ bitmap_initialize (&problem_data->sparse_invalidated_by_eh,
&problem_data->rd_bitmaps);
- bitmap_initialize (&problem_data->dense_invalidated_by_call,
+ bitmap_initialize (&problem_data->dense_invalidated_by_eh,
&problem_data->rd_bitmaps);
}
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
+ class df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
/* When bitmaps are already initialized, just clear them. */
if (bb_info->kill.obstack)
of kill sets. */
static void
-df_rd_bb_local_compute_process_def (struct df_rd_bb_info *bb_info,
+df_rd_bb_local_compute_process_def (class df_rd_bb_info *bb_info,
df_ref def,
int top_flag)
{
df_rd_bb_local_compute (unsigned int bb_index)
{
basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
- struct df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
+ class df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
rtx_insn *insn;
bitmap_clear (&seen_in_block);
{
unsigned int bb_index;
bitmap_iterator bi;
- unsigned int regno;
- struct df_rd_problem_data *problem_data
- = (struct df_rd_problem_data *) df_rd->problem_data;
- bitmap sparse_invalidated = &problem_data->sparse_invalidated_by_call;
- bitmap dense_invalidated = &problem_data->dense_invalidated_by_call;
+ class df_rd_problem_data *problem_data
+ = (class df_rd_problem_data *) df_rd->problem_data;
+ bitmap sparse_invalidated = &problem_data->sparse_invalidated_by_eh;
+ bitmap dense_invalidated = &problem_data->dense_invalidated_by_eh;
bitmap_initialize (&seen_in_block, &df_bitmap_obstack);
bitmap_initialize (&seen_in_insn, &df_bitmap_obstack);
df_rd_bb_local_compute (bb_index);
}
- /* Set up the knockout bit vectors to be applied across EH_EDGES. */
- EXECUTE_IF_SET_IN_BITMAP (regs_invalidated_by_call_regset, 0, regno, bi)
- {
- if (! HARD_REGISTER_NUM_P (regno)
- || !(df->changeable_flags & DF_NO_HARD_REGS))
+ /* Set up the knockout bit vectors to be applied across EH_EDGES.
+ Conservatively treat partially-clobbered registers as surviving
+ across the EH edge, i.e. assume that definitions before the edge
+ is taken *might* reach uses after it has been taken. */
+ if (!(df->changeable_flags & DF_NO_HARD_REGS))
+ for (unsigned int regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno)
+ if (eh_edge_abi.clobbers_full_reg_p (regno))
{
if (DF_DEFS_COUNT (regno) > DF_SPARSE_THRESHOLD)
bitmap_set_bit (sparse_invalidated, regno);
DF_DEFS_BEGIN (regno),
DF_DEFS_COUNT (regno));
}
- }
- bitmap_clear (&seen_in_block);
- bitmap_clear (&seen_in_insn);
+ bitmap_release (&seen_in_block);
+ bitmap_release (&seen_in_insn);
}
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
+ class df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
bitmap_copy (&bb_info->out, &bb_info->gen);
bitmap_clear (&bb_info->in);
if (e->flags & EDGE_EH)
{
- struct df_rd_problem_data *problem_data
- = (struct df_rd_problem_data *) df_rd->problem_data;
- bitmap sparse_invalidated = &problem_data->sparse_invalidated_by_call;
- bitmap dense_invalidated = &problem_data->dense_invalidated_by_call;
+ class df_rd_problem_data *problem_data
+ = (class df_rd_problem_data *) df_rd->problem_data;
+ bitmap sparse_invalidated = &problem_data->sparse_invalidated_by_eh;
+ bitmap dense_invalidated = &problem_data->dense_invalidated_by_eh;
bitmap_iterator bi;
unsigned int regno;
- bitmap_head tmp;
- bitmap_initialize (&tmp, &df_bitmap_obstack);
- bitmap_and_compl (&tmp, op2, dense_invalidated);
+ auto_bitmap tmp (&df_bitmap_obstack);
+ bitmap_and_compl (tmp, op2, dense_invalidated);
EXECUTE_IF_SET_IN_BITMAP (sparse_invalidated, 0, regno, bi)
{
- bitmap_clear_range (&tmp,
+ bitmap_clear_range (tmp,
DF_DEFS_BEGIN (regno),
DF_DEFS_COUNT (regno));
}
- changed |= bitmap_ior_into (op1, &tmp);
- bitmap_clear (&tmp);
+ changed |= bitmap_ior_into (op1, tmp);
return changed;
}
else
static bool
df_rd_transfer_function (int bb_index)
{
- struct df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
+ class df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
unsigned int regno;
bitmap_iterator bi;
bitmap in = &bb_info->in;
changed = bitmap_ior_and_compl (out, gen, in, kill);
else
{
- struct df_rd_problem_data *problem_data;
+ class df_rd_problem_data *problem_data;
bitmap_head tmp;
/* Note that TMP is _not_ a temporary bitmap if we end up replacing
OUT with TMP. Therefore, allocate TMP in the RD bitmaps obstack. */
- problem_data = (struct df_rd_problem_data *) df_rd->problem_data;
+ problem_data = (class df_rd_problem_data *) df_rd->problem_data;
bitmap_initialize (&tmp, &problem_data->rd_bitmaps);
bitmap_and_compl (&tmp, in, kill);
bitmap_ior_into (&tmp, gen);
changed = !bitmap_equal_p (&tmp, out);
if (changed)
- {
- bitmap_clear (out);
- bb_info->out = tmp;
- }
+ bitmap_move (out, &tmp);
else
bitmap_clear (&tmp);
}
basic block, and mask out DEFs of registers that are not live.
Computing the mask looks costly, but the benefit of the pruning
outweighs the cost. */
- struct df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
+ class df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
bitmap regs_live_out = &df_lr_get_bb_info (bb_index)->out;
bitmap live_defs = BITMAP_ALLOC (&df_bitmap_obstack);
unsigned int regno;
static void
df_rd_free (void)
{
- struct df_rd_problem_data *problem_data
- = (struct df_rd_problem_data *) df_rd->problem_data;
+ class df_rd_problem_data *problem_data
+ = (class df_rd_problem_data *) df_rd->problem_data;
if (problem_data)
{
static void
df_rd_start_dump (FILE *file)
{
- struct df_rd_problem_data *problem_data
- = (struct df_rd_problem_data *) df_rd->problem_data;
+ class df_rd_problem_data *problem_data
+ = (class df_rd_problem_data *) df_rd->problem_data;
unsigned int m = DF_REG_SIZE (df);
unsigned int regno;
fprintf (file, ";; Reaching defs:\n");
fprintf (file, ";; sparse invalidated \t");
- dump_bitmap (file, &problem_data->sparse_invalidated_by_call);
+ dump_bitmap (file, &problem_data->sparse_invalidated_by_eh);
fprintf (file, ";; dense invalidated \t");
- dump_bitmap (file, &problem_data->dense_invalidated_by_call);
+ dump_bitmap (file, &problem_data->dense_invalidated_by_eh);
fprintf (file, ";; reg->defs[] map:\t");
for (regno = 0; regno < m; regno++)
static void
df_rd_top_dump (basic_block bb, FILE *file)
{
- struct df_rd_bb_info *bb_info = df_rd_get_bb_info (bb->index);
+ class df_rd_bb_info *bb_info = df_rd_get_bb_info (bb->index);
if (!bb_info)
return;
static void
df_rd_bottom_dump (basic_block bb, FILE *file)
{
- struct df_rd_bb_info *bb_info = df_rd_get_bb_info (bb->index);
+ class df_rd_bb_info *bb_info = df_rd_get_bb_info (bb->index);
if (!bb_info)
return;
/* All of the information associated with every instance of the problem. */
-static struct df_problem problem_RD =
+static const struct df_problem problem_RD =
{
DF_RD, /* Problem id. */
DF_FORWARD, /* Direction. */
NULL, /* Incremental solution verify start. */
NULL, /* Incremental solution verify end. */
NULL, /* Dependent problem. */
- sizeof (struct df_rd_bb_info),/* Size of entry of block_info array. */
+ sizeof (class df_rd_bb_info),/* Size of entry of block_info array. */
TV_DF_RD, /* Timing variable. */
true /* Reset blocks on dropping out of blocks_to_analyze. */
};
df_lr_free_bb_info (basic_block bb ATTRIBUTE_UNUSED,
void *vbb_info)
{
- struct df_lr_bb_info *bb_info = (struct df_lr_bb_info *) vbb_info;
+ class df_lr_bb_info *bb_info = (class df_lr_bb_info *) vbb_info;
if (bb_info)
{
bitmap_clear (&bb_info->use);
EXECUTE_IF_SET_IN_BITMAP (df_lr->out_of_date_transfer_functions, 0, bb_index, bi)
{
- struct df_lr_bb_info *bb_info = df_lr_get_bb_info (bb_index);
+ class df_lr_bb_info *bb_info = df_lr_get_bb_info (bb_index);
/* When bitmaps are already initialized, just clear them. */
if (bb_info->use.obstack)
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_lr_bb_info *bb_info = df_lr_get_bb_info (bb_index);
+ class df_lr_bb_info *bb_info = df_lr_get_bb_info (bb_index);
gcc_assert (bb_info);
bitmap_clear (&bb_info->in);
bitmap_clear (&bb_info->out);
df_lr_bb_local_compute (unsigned int bb_index)
{
basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
- struct df_lr_bb_info *bb_info = df_lr_get_bb_info (bb_index);
+ class df_lr_bb_info *bb_info = df_lr_get_bb_info (bb_index);
rtx_insn *insn;
df_ref def, use;
reference of the frame pointer. */
bitmap_set_bit (&df->hardware_regs_used, 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])
+ if (FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
+ && fixed_regs[ARG_POINTER_REGNUM])
bitmap_set_bit (&df->hardware_regs_used, ARG_POINTER_REGNUM);
-#endif
/* Any constant, or pseudo with constant equivalences, may
require reloading from memory using the pic register. */
{
/* The exit block is special for this problem and its bits are
computed from thin air. */
- struct df_lr_bb_info *bb_info = df_lr_get_bb_info (EXIT_BLOCK);
+ class df_lr_bb_info *bb_info = df_lr_get_bb_info (EXIT_BLOCK);
bitmap_copy (&bb_info->use, df->exit_block_uses);
}
else
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_lr_bb_info *bb_info = df_lr_get_bb_info (bb_index);
+ class df_lr_bb_info *bb_info = df_lr_get_bb_info (bb_index);
bitmap_copy (&bb_info->in, &bb_info->use);
bitmap_clear (&bb_info->out);
}
bitmap op2 = &df_lr_get_bb_info (e->dest->index)->in;
bool changed = false;
- /* Call-clobbered registers die across exception and call edges. */
+ /* Call-clobbered registers die across exception and call edges.
+ Conservatively treat partially-clobbered registers as surviving
+ across the edges; they might or might not, depending on what
+ mode they have. */
/* ??? Abnormal call edges ignored for the moment, as this gets
confused by sibling call edges, which crashes reg-stack. */
if (e->flags & EDGE_EH)
- changed = bitmap_ior_and_compl_into (op1, op2, regs_invalidated_by_call_regset);
+ {
+ bitmap_view<HARD_REG_SET> eh_kills (eh_edge_abi.full_reg_clobbers ());
+ changed = bitmap_ior_and_compl_into (op1, op2, eh_kills);
+ }
else
changed = bitmap_ior_into (op1, op2);
static bool
df_lr_transfer_function (int bb_index)
{
- struct df_lr_bb_info *bb_info = df_lr_get_bb_info (bb_index);
+ class df_lr_bb_info *bb_info = df_lr_get_bb_info (bb_index);
bitmap in = &bb_info->in;
bitmap out = &bb_info->out;
bitmap use = &bb_info->use;
static void
df_lr_top_dump (basic_block bb, FILE *file)
{
- struct df_lr_bb_info *bb_info = df_lr_get_bb_info (bb->index);
+ class df_lr_bb_info *bb_info = df_lr_get_bb_info (bb->index);
struct df_lr_problem_data *problem_data;
if (!bb_info)
return;
static void
df_lr_bottom_dump (basic_block bb, FILE *file)
{
- struct df_lr_bb_info *bb_info = df_lr_get_bb_info (bb->index);
+ class df_lr_bb_info *bb_info = df_lr_get_bb_info (bb->index);
struct df_lr_problem_data *problem_data;
if (!bb_info)
return;
/* All of the information associated with every instance of the problem. */
-static struct df_problem problem_LR =
+static const struct df_problem problem_LR =
{
DF_LR, /* Problem id. */
DF_BACKWARD, /* Direction. */
df_lr_verify_solution_start,/* Incremental solution verify start. */
df_lr_verify_solution_end, /* Incremental solution verify end. */
NULL, /* Dependent problem. */
- sizeof (struct df_lr_bb_info),/* Size of entry of block_info array. */
+ sizeof (class df_lr_bb_info),/* Size of entry of block_info array. */
TV_DF_LR, /* Timing variable. */
false /* Reset blocks on dropping out of blocks_to_analyze. */
};
FOR_ALL_BB_FN (bb, cfun)
{
- struct df_lr_bb_info *bb_info = df_lr_get_bb_info (bb->index);
+ class df_lr_bb_info *bb_info = df_lr_get_bb_info (bb->index);
bitmap_set_bit (&all_blocks, bb->index);
if (bb_info)
\f
/*----------------------------------------------------------------------------
- LIVE AND MUST-INITIALIZED REGISTERS.
+ LIVE AND MAY-INITIALIZED REGISTERS.
This problem first computes the IN and OUT bitvectors for the
- must-initialized registers problems, which is a forward problem.
- It gives the set of registers for which we MUST have an available
- definition on any path from the entry block to the entry/exit of
- a basic block. Sets generate a definition, while clobbers kill
+ may-initialized registers problems, which is a forward problem.
+ It gives the set of registers for which we MAY have an available
+ definition, i.e. for which there is an available definition on
+ at least one path from the entry block to the entry/exit of a
+ basic block. Sets generate a definition, while clobbers kill
a definition.
In and out bitvectors are built for each basic block and are indexed by
regnum (see df.h for details). In and out bitvectors in struct
- df_live_bb_info actually refers to the must-initialized problem;
+ df_live_bb_info actually refers to the may-initialized problem;
Then, the in and out sets for the LIVE problem itself are computed.
These are the logical AND of the IN and OUT sets from the LR problem
- and the must-initialized problem.
+ and the may-initialized problem.
----------------------------------------------------------------------------*/
/* Private data used to verify the solution for this problem. */
df_live_free_bb_info (basic_block bb ATTRIBUTE_UNUSED,
void *vbb_info)
{
- struct df_live_bb_info *bb_info = (struct df_live_bb_info *) vbb_info;
+ class df_live_bb_info *bb_info = (class df_live_bb_info *) vbb_info;
if (bb_info)
{
bitmap_clear (&bb_info->gen);
EXECUTE_IF_SET_IN_BITMAP (df_live->out_of_date_transfer_functions, 0, bb_index, bi)
{
- struct df_live_bb_info *bb_info = df_live_get_bb_info (bb_index);
+ class df_live_bb_info *bb_info = df_live_get_bb_info (bb_index);
/* When bitmaps are already initialized, just clear them. */
if (bb_info->kill.obstack)
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_live_bb_info *bb_info = df_live_get_bb_info (bb_index);
+ class df_live_bb_info *bb_info = df_live_get_bb_info (bb_index);
gcc_assert (bb_info);
bitmap_clear (&bb_info->in);
bitmap_clear (&bb_info->out);
df_live_bb_local_compute (unsigned int bb_index)
{
basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
- struct df_live_bb_info *bb_info = df_live_get_bb_info (bb_index);
+ class df_live_bb_info *bb_info = df_live_get_bb_info (bb_index);
rtx_insn *insn;
df_ref def;
int luid = 0;
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_live_bb_info *bb_info = df_live_get_bb_info (bb_index);
- struct df_lr_bb_info *bb_lr_info = df_lr_get_bb_info (bb_index);
+ class df_live_bb_info *bb_info = df_live_get_bb_info (bb_index);
+ class df_lr_bb_info *bb_lr_info = df_lr_get_bb_info (bb_index);
/* No register may reach a location where it is not used. Thus
we trim the rr result to the places where it is used. */
}
-/* Transfer function for the forwards must-initialized problem. */
+/* Transfer function for the forwards may-initialized problem. */
static bool
df_live_transfer_function (int bb_index)
{
- struct df_live_bb_info *bb_info = df_live_get_bb_info (bb_index);
- struct df_lr_bb_info *bb_lr_info = df_lr_get_bb_info (bb_index);
+ class df_live_bb_info *bb_info = df_live_get_bb_info (bb_index);
+ class df_lr_bb_info *bb_lr_info = df_lr_get_bb_info (bb_index);
bitmap in = &bb_info->in;
bitmap out = &bb_info->out;
bitmap gen = &bb_info->gen;
}
-/* And the LR info with the must-initialized registers, to produce the LIVE info. */
+/* And the LR info with the may-initialized registers to produce the LIVE info. */
static void
df_live_finalize (bitmap all_blocks)
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_lr_bb_info *bb_lr_info = df_lr_get_bb_info (bb_index);
- struct df_live_bb_info *bb_live_info = df_live_get_bb_info (bb_index);
+ class df_lr_bb_info *bb_lr_info = df_lr_get_bb_info (bb_index);
+ class df_live_bb_info *bb_live_info = df_live_get_bb_info (bb_index);
/* No register may reach a location where it is not used. Thus
we trim the rr result to the places where it is used. */
df_live->block_info_size = 0;
free (df_live->block_info);
df_live->block_info = NULL;
- bitmap_clear (&df_live_scratch);
+ bitmap_release (&df_live_scratch);
bitmap_obstack_release (&problem_data->live_bitmaps);
free (problem_data);
df_live->problem_data = NULL;
static void
df_live_top_dump (basic_block bb, FILE *file)
{
- struct df_live_bb_info *bb_info = df_live_get_bb_info (bb->index);
+ class df_live_bb_info *bb_info = df_live_get_bb_info (bb->index);
struct df_live_problem_data *problem_data;
if (!bb_info)
static void
df_live_bottom_dump (basic_block bb, FILE *file)
{
- struct df_live_bb_info *bb_info = df_live_get_bb_info (bb->index);
+ class df_live_bb_info *bb_info = df_live_get_bb_info (bb->index);
struct df_live_problem_data *problem_data;
if (!bb_info)
/* All of the information associated with every instance of the problem. */
-static struct df_problem problem_LIVE =
+static const struct df_problem problem_LIVE =
{
DF_LIVE, /* Problem id. */
DF_FORWARD, /* Direction. */
df_live_verify_solution_start,/* Incremental solution verify start. */
df_live_verify_solution_end, /* Incremental solution verify end. */
&problem_LR, /* Dependent problem. */
- sizeof (struct df_live_bb_info),/* Size of entry of block_info array. */
+ sizeof (class df_live_bb_info),/* Size of entry of block_info array. */
TV_DF_LIVE, /* Timing variable. */
false /* Reset blocks on dropping out of blocks_to_analyze. */
};
FOR_ALL_BB_FN (bb, cfun)
{
- struct df_live_bb_info *bb_info = df_live_get_bb_info (bb->index);
+ class df_live_bb_info *bb_info = df_live_get_bb_info (bb->index);
bitmap_set_bit (&all_blocks, bb->index);
if (bb_info)
bitmap_clear (&all_blocks);
}
\f
+/*----------------------------------------------------------------------------
+ MUST-INITIALIZED REGISTERS.
+----------------------------------------------------------------------------*/
+
+/* Private data used to verify the solution for this problem. */
+struct df_mir_problem_data
+{
+ bitmap_head *in;
+ bitmap_head *out;
+ /* An obstack for the bitmaps we need for this problem. */
+ bitmap_obstack mir_bitmaps;
+};
+
+
+/* Free basic block info. */
+
+static void
+df_mir_free_bb_info (basic_block bb ATTRIBUTE_UNUSED,
+ void *vbb_info)
+{
+ class df_mir_bb_info *bb_info = (class df_mir_bb_info *) vbb_info;
+ if (bb_info)
+ {
+ bitmap_clear (&bb_info->gen);
+ bitmap_clear (&bb_info->kill);
+ bitmap_clear (&bb_info->in);
+ bitmap_clear (&bb_info->out);
+ }
+}
+
+
+/* Allocate or reset bitmaps for DF_MIR blocks. The solution bits are
+ not touched unless the block is new. */
+
+static void
+df_mir_alloc (bitmap all_blocks)
+{
+ unsigned int bb_index;
+ bitmap_iterator bi;
+ struct df_mir_problem_data *problem_data;
+
+ if (df_mir->problem_data)
+ problem_data = (struct df_mir_problem_data *) df_mir->problem_data;
+ else
+ {
+ problem_data = XNEW (struct df_mir_problem_data);
+ df_mir->problem_data = problem_data;
+
+ problem_data->out = NULL;
+ problem_data->in = NULL;
+ bitmap_obstack_initialize (&problem_data->mir_bitmaps);
+ }
+
+ df_grow_bb_info (df_mir);
+
+ EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
+ {
+ class df_mir_bb_info *bb_info = df_mir_get_bb_info (bb_index);
+
+ /* When bitmaps are already initialized, just clear them. */
+ if (bb_info->kill.obstack)
+ {
+ bitmap_clear (&bb_info->kill);
+ bitmap_clear (&bb_info->gen);
+ }
+ else
+ {
+ bitmap_initialize (&bb_info->kill, &problem_data->mir_bitmaps);
+ bitmap_initialize (&bb_info->gen, &problem_data->mir_bitmaps);
+ bitmap_initialize (&bb_info->in, &problem_data->mir_bitmaps);
+ bitmap_initialize (&bb_info->out, &problem_data->mir_bitmaps);
+ bitmap_set_range (&bb_info->in, 0, DF_REG_SIZE (df));
+ bitmap_set_range (&bb_info->out, 0, DF_REG_SIZE (df));
+ }
+ }
+
+ df_mir->optional_p = 1;
+}
+
+
+/* Reset the global solution for recalculation. */
+
+static void
+df_mir_reset (bitmap all_blocks)
+{
+ unsigned int bb_index;
+ bitmap_iterator bi;
+
+ EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
+ {
+ class df_mir_bb_info *bb_info = df_mir_get_bb_info (bb_index);
+
+ gcc_assert (bb_info);
+
+ bitmap_clear (&bb_info->in);
+ bitmap_set_range (&bb_info->in, 0, DF_REG_SIZE (df));
+ bitmap_clear (&bb_info->out);
+ bitmap_set_range (&bb_info->out, 0, DF_REG_SIZE (df));
+ }
+}
+
+
+/* Compute local uninitialized register info for basic block BB. */
+
+static void
+df_mir_bb_local_compute (unsigned int bb_index)
+{
+ basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
+ class df_mir_bb_info *bb_info = df_mir_get_bb_info (bb_index);
+ rtx_insn *insn;
+ int luid = 0;
+
+ /* Ignoring artificial defs is intentional: these often pretend that some
+ registers carry incoming arguments (when they are FUNCTION_ARG_REGNO) even
+ though they are not used for that. As a result, conservatively assume
+ they may be uninitialized. */
+
+ FOR_BB_INSNS (bb, insn)
+ {
+ unsigned int uid = INSN_UID (insn);
+ struct df_insn_info *insn_info = DF_INSN_UID_GET (uid);
+
+ /* Inserting labels does not always trigger the incremental
+ rescanning. */
+ if (!insn_info)
+ {
+ gcc_assert (!INSN_P (insn));
+ insn_info = df_insn_create_insn_record (insn);
+ }
+
+ DF_INSN_INFO_LUID (insn_info) = luid;
+ if (!INSN_P (insn))
+ continue;
+
+ luid++;
+ df_mir_simulate_one_insn (bb, insn, &bb_info->kill, &bb_info->gen);
+ }
+}
+
+
+/* Compute local uninitialized register info. */
+
+static void
+df_mir_local_compute (bitmap all_blocks)
+{
+ unsigned int bb_index;
+ bitmap_iterator bi;
+
+ df_grow_insn_info ();
+
+ EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
+ {
+ df_mir_bb_local_compute (bb_index);
+ }
+}
+
+
+/* Initialize the solution vectors. */
+
+static void
+df_mir_init (bitmap all_blocks)
+{
+ df_mir_reset (all_blocks);
+}
+
+
+/* Initialize IN sets for blocks with no predecessors: when landing on such
+ blocks, assume all registers are uninitialized. */
+
+static void
+df_mir_confluence_0 (basic_block bb)
+{
+ class df_mir_bb_info *bb_info = df_mir_get_bb_info (bb->index);
+
+ bitmap_clear (&bb_info->in);
+}
+
+
+/* Forward confluence function that ignores fake edges. */
+
+static bool
+df_mir_confluence_n (edge e)
+{
+ bitmap op1 = &df_mir_get_bb_info (e->dest->index)->in;
+ bitmap op2 = &df_mir_get_bb_info (e->src->index)->out;
+
+ if (e->flags & EDGE_FAKE)
+ return false;
+
+ /* A register is must-initialized at the entry of a basic block iff it is
+ must-initialized at the exit of all the predecessors. */
+ return bitmap_and_into (op1, op2);
+}
+
+
+/* Transfer function for the forwards must-initialized problem. */
+
+static bool
+df_mir_transfer_function (int bb_index)
+{
+ class df_mir_bb_info *bb_info = df_mir_get_bb_info (bb_index);
+ bitmap in = &bb_info->in;
+ bitmap out = &bb_info->out;
+ bitmap gen = &bb_info->gen;
+ bitmap kill = &bb_info->kill;
+
+ return bitmap_ior_and_compl (out, gen, in, kill);
+}
+
+
+/* Free all storage associated with the problem. */
+
+static void
+df_mir_free (void)
+{
+ struct df_mir_problem_data *problem_data
+ = (struct df_mir_problem_data *) df_mir->problem_data;
+ if (df_mir->block_info)
+ {
+ df_mir->block_info_size = 0;
+ free (df_mir->block_info);
+ df_mir->block_info = NULL;
+ bitmap_obstack_release (&problem_data->mir_bitmaps);
+ free (problem_data);
+ df_mir->problem_data = NULL;
+ }
+ free (df_mir);
+}
+
+
+/* Debugging info at top of bb. */
+
+static void
+df_mir_top_dump (basic_block bb, FILE *file)
+{
+ class df_mir_bb_info *bb_info = df_mir_get_bb_info (bb->index);
+
+ if (!bb_info)
+ return;
+
+ fprintf (file, ";; mir in \t");
+ df_print_regset (file, &bb_info->in);
+ fprintf (file, ";; mir kill\t");
+ df_print_regset (file, &bb_info->kill);
+ fprintf (file, ";; mir gen \t");
+ df_print_regset (file, &bb_info->gen);
+}
+
+/* Debugging info at bottom of bb. */
+
+static void
+df_mir_bottom_dump (basic_block bb, FILE *file)
+{
+ class df_mir_bb_info *bb_info = df_mir_get_bb_info (bb->index);
+
+ if (!bb_info)
+ return;
+
+ fprintf (file, ";; mir out \t");
+ df_print_regset (file, &bb_info->out);
+}
+
+
+/* Build the datastructure to verify that the solution to the dataflow
+ equations is not dirty. */
+
+static void
+df_mir_verify_solution_start (void)
+{
+ basic_block bb;
+ struct df_mir_problem_data *problem_data;
+ if (df_mir->solutions_dirty)
+ return;
+
+ /* Set it true so that the solution is recomputed. */
+ df_mir->solutions_dirty = true;
+
+ problem_data = (struct df_mir_problem_data *) df_mir->problem_data;
+ problem_data->in = XNEWVEC (bitmap_head, last_basic_block_for_fn (cfun));
+ problem_data->out = XNEWVEC (bitmap_head, last_basic_block_for_fn (cfun));
+ bitmap_obstack_initialize (&problem_data->mir_bitmaps);
+
+ FOR_ALL_BB_FN (bb, cfun)
+ {
+ bitmap_initialize (&problem_data->in[bb->index], &problem_data->mir_bitmaps);
+ bitmap_initialize (&problem_data->out[bb->index], &problem_data->mir_bitmaps);
+ bitmap_copy (&problem_data->in[bb->index], DF_MIR_IN (bb));
+ bitmap_copy (&problem_data->out[bb->index], DF_MIR_OUT (bb));
+ }
+}
+
+
+/* Compare the saved datastructure and the new solution to the dataflow
+ equations. */
+
+static void
+df_mir_verify_solution_end (void)
+{
+ struct df_mir_problem_data *problem_data;
+ basic_block bb;
+
+ problem_data = (struct df_mir_problem_data *) df_mir->problem_data;
+ if (!problem_data->out)
+ return;
+
+ FOR_ALL_BB_FN (bb, cfun)
+ {
+ if ((!bitmap_equal_p (&problem_data->in[bb->index], DF_MIR_IN (bb)))
+ || (!bitmap_equal_p (&problem_data->out[bb->index], DF_MIR_OUT (bb))))
+ gcc_unreachable ();
+ }
+
+ /* Cannot delete them immediately because you may want to dump them
+ if the comparison fails. */
+ FOR_ALL_BB_FN (bb, cfun)
+ {
+ bitmap_clear (&problem_data->in[bb->index]);
+ bitmap_clear (&problem_data->out[bb->index]);
+ }
+
+ free (problem_data->in);
+ free (problem_data->out);
+ bitmap_obstack_release (&problem_data->mir_bitmaps);
+ free (problem_data);
+ df_mir->problem_data = NULL;
+}
+
+
+/* All of the information associated with every instance of the problem. */
+
+static const struct df_problem problem_MIR =
+{
+ DF_MIR, /* Problem id. */
+ DF_FORWARD, /* Direction. */
+ df_mir_alloc, /* Allocate the problem specific data. */
+ df_mir_reset, /* Reset global information. */
+ df_mir_free_bb_info, /* Free basic block info. */
+ df_mir_local_compute, /* Local compute function. */
+ df_mir_init, /* Init the solution specific data. */
+ df_worklist_dataflow, /* Worklist solver. */
+ df_mir_confluence_0, /* Confluence operator 0. */
+ df_mir_confluence_n, /* Confluence operator n. */
+ df_mir_transfer_function, /* Transfer function. */
+ NULL, /* Finalize function. */
+ df_mir_free, /* Free all of the problem information. */
+ df_mir_free, /* Remove this problem from the stack of dataflow problems. */
+ NULL, /* Debugging. */
+ df_mir_top_dump, /* Debugging start block. */
+ df_mir_bottom_dump, /* Debugging end block. */
+ NULL, /* Debugging start insn. */
+ NULL, /* Debugging end insn. */
+ df_mir_verify_solution_start, /* Incremental solution verify start. */
+ df_mir_verify_solution_end, /* Incremental solution verify end. */
+ NULL, /* Dependent problem. */
+ sizeof (class df_mir_bb_info),/* Size of entry of block_info array. */
+ TV_DF_MIR, /* Timing variable. */
+ false /* Reset blocks on dropping out of blocks_to_analyze. */
+};
+
+
+/* Create a new DATAFLOW instance and add it to an existing instance
+ of DF. */
+
+void
+df_mir_add_problem (void)
+{
+ df_add_problem (&problem_MIR);
+ /* These will be initialized when df_scan_blocks processes each
+ block. */
+ df_mir->out_of_date_transfer_functions = BITMAP_ALLOC (&df_bitmap_obstack);
+}
+
+
+/* Apply the effects of the gen/kills in INSN to the corresponding bitmaps. */
+
+void
+df_mir_simulate_one_insn (basic_block bb ATTRIBUTE_UNUSED, rtx_insn *insn,
+ bitmap kill, bitmap gen)
+{
+ df_ref def;
+
+ FOR_EACH_INSN_DEF (def, insn)
+ {
+ unsigned int regno = DF_REF_REGNO (def);
+
+ /* The order of GENs/KILLs matters, so if this def clobbers a reg, any
+ previous gen is irrelevant (and reciprocally). Also, claim that a
+ register is GEN only if it is in all cases. */
+ if (DF_REF_FLAGS_IS_SET (def, DF_REF_MUST_CLOBBER | DF_REF_MAY_CLOBBER))
+ {
+ bitmap_set_bit (kill, regno);
+ bitmap_clear_bit (gen, regno);
+ }
+ /* In the worst case, partial and conditional defs can leave bits
+ uninitialized, so assume they do not change anything. */
+ else if (!DF_REF_FLAGS_IS_SET (def, DF_REF_PARTIAL | DF_REF_CONDITIONAL))
+ {
+ bitmap_set_bit (gen, regno);
+ bitmap_clear_bit (kill, regno);
+ }
+ }
+}
+\f
/*----------------------------------------------------------------------------
CREATE DEF_USE (DU) and / or USE_DEF (UD) CHAINS
df_chain_create (df_ref src, df_ref dst)
{
struct df_link *head = DF_REF_CHAIN (src);
- struct df_link *link = (struct df_link *) pool_alloc (df_chain->block_pool);
+ struct df_link *link = df_chain->block_pool->allocate ();
DF_REF_CHAIN (src) = link;
link->next = head;
prev->next = chain->next;
else
DF_REF_CHAIN (ref) = chain->next;
- pool_free (df_chain->block_pool, chain);
+ df_chain->block_pool->remove (chain);
return;
}
prev = chain;
struct df_link *next = chain->next;
/* Delete the other side if it exists. */
df_chain_unlink_1 (chain->ref, ref);
- pool_free (df_chain->block_pool, chain);
+ df_chain->block_pool->remove (chain);
chain = next;
}
DF_REF_CHAIN (ref) = NULL;
/* Wholesale destruction of the old chains. */
if (df_chain->block_pool)
- free_alloc_pool (df_chain->block_pool);
+ delete df_chain->block_pool;
EXECUTE_IF_SET_IN_BITMAP (df_chain->out_of_date_transfer_functions, 0, bb_index, bi)
{
df_chain_alloc (bitmap all_blocks ATTRIBUTE_UNUSED)
{
df_chain_remove_problem ();
- df_chain->block_pool = create_alloc_pool ("df_chain_block pool",
- sizeof (struct df_link), 50);
+ df_chain->block_pool = new object_allocator<df_link> ("df_chain_block pool");
df_chain->optional_p = true;
}
df_chain_create_bb (unsigned int bb_index)
{
basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
- struct df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
+ class df_rd_bb_info *bb_info = df_rd_get_bb_info (bb_index);
rtx_insn *insn;
bitmap_head cpy;
static void
df_chain_free (void)
{
- free_alloc_pool (df_chain->block_pool);
+ delete df_chain->block_pool;
BITMAP_FREE (df_chain->out_of_date_transfer_functions);
free (df_chain);
}
}
}
-static struct df_problem problem_CHAIN =
+static const struct df_problem problem_CHAIN =
{
DF_CHAIN, /* Problem id. */
DF_NONE, /* Direction. */
df_word_lr_free_bb_info (basic_block bb ATTRIBUTE_UNUSED,
void *vbb_info)
{
- struct df_word_lr_bb_info *bb_info = (struct df_word_lr_bb_info *) vbb_info;
+ class df_word_lr_bb_info *bb_info = (class df_word_lr_bb_info *) vbb_info;
if (bb_info)
{
bitmap_clear (&bb_info->use);
EXECUTE_IF_SET_IN_BITMAP (df_word_lr->out_of_date_transfer_functions, 0, bb_index, bi)
{
- struct df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb_index);
+ class df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb_index);
/* When bitmaps are already initialized, just clear them. */
if (bb_info->use.obstack)
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb_index);
+ class df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb_index);
gcc_assert (bb_info);
bitmap_clear (&bb_info->in);
bitmap_clear (&bb_info->out);
{
rtx orig_reg = DF_REF_REG (ref);
rtx reg = orig_reg;
- enum machine_mode reg_mode;
+ machine_mode reg_mode;
unsigned regno;
/* Left at -1 for whole accesses. */
int which_subword = -1;
regno = REGNO (reg);
reg_mode = GET_MODE (reg);
if (regno < FIRST_PSEUDO_REGISTER
- || GET_MODE_SIZE (reg_mode) != 2 * UNITS_PER_WORD)
+ || maybe_ne (GET_MODE_SIZE (reg_mode), 2 * UNITS_PER_WORD))
return true;
if (GET_CODE (orig_reg) == SUBREG
- && df_read_modify_subreg_p (orig_reg))
+ && read_modify_subreg_p (orig_reg))
{
gcc_assert (DF_REF_FLAGS_IS_SET (ref, DF_REF_PARTIAL));
if (subreg_lowpart_p (orig_reg))
df_word_lr_bb_local_compute (unsigned int bb_index)
{
basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
- struct df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb_index);
+ class df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb_index);
rtx_insn *insn;
df_ref def, use;
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb_index);
+ class df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb_index);
bitmap_copy (&bb_info->in, &bb_info->use);
bitmap_clear (&bb_info->out);
}
static bool
df_word_lr_transfer_function (int bb_index)
{
- struct df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb_index);
+ class df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb_index);
bitmap in = &bb_info->in;
bitmap out = &bb_info->out;
bitmap use = &bb_info->use;
static void
df_word_lr_top_dump (basic_block bb, FILE *file)
{
- struct df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb->index);
+ class df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb->index);
if (!bb_info)
return;
static void
df_word_lr_bottom_dump (basic_block bb, FILE *file)
{
- struct df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb->index);
+ class df_word_lr_bb_info *bb_info = df_word_lr_get_bb_info (bb->index);
if (!bb_info)
return;
/* All of the information associated with every instance of the problem. */
-static struct df_problem problem_WORD_LR =
+static const struct df_problem problem_WORD_LR =
{
DF_WORD_LR, /* Problem id. */
DF_BACKWARD, /* Direction. */
NULL, /* Incremental solution verify start. */
NULL, /* Incremental solution verify end. */
NULL, /* Dependent problem. */
- sizeof (struct df_word_lr_bb_info),/* Size of entry of block_info array. */
+ sizeof (class df_word_lr_bb_info),/* Size of entry of block_info array. */
TV_DF_WORD_LR, /* Timing variable. */
false /* Reset blocks on dropping out of blocks_to_analyze. */
};
bool deleted = false;
FOR_EACH_INSN_EQ_USE (use, insn)
- if (DF_REF_REGNO (use) > FIRST_PSEUDO_REGISTER
+ if (DF_REF_REGNO (use) >= FIRST_PSEUDO_REGISTER
&& DF_REF_LOC (use)
&& (DF_REF_FLAGS (use) & DF_REF_IN_NOTE)
&& !bitmap_bit_p (live, DF_REF_REGNO (use))
/* Set a NOTE_TYPE note for REG in INSN. */
static inline void
-df_set_note (enum reg_note note_type, rtx insn, rtx reg)
+df_set_note (enum reg_note note_type, rtx_insn *insn, rtx reg)
{
gcc_checking_assert (!DEBUG_INSN_P (insn));
add_reg_note (insn, note_type, reg);
FOR_BB_INSNS_REVERSE (bb, insn)
{
+ if (!INSN_P (insn))
+ continue;
+
df_insn_info *insn_info = DF_INSN_INFO_GET (insn);
df_mw_hardreg *mw;
int debug_insn;
- if (!INSN_P (insn))
- continue;
-
debug_insn = DEBUG_INSN_P (insn);
bitmap_clear (do_not_gen);
/* All of the information associated every instance of the problem. */
-static struct df_problem problem_NOTE =
+static const struct df_problem problem_NOTE =
{
DF_NOTE, /* Problem id. */
DF_NONE, /* Direction. */
case REG_UNUSED:
{
rtx reg = XEXP (link, 0);
- int regno = REGNO (reg);
- if (HARD_REGISTER_NUM_P (regno))
- bitmap_clear_range (live, regno,
- hard_regno_nregs[regno][GET_MODE (reg)]);
- else
- bitmap_clear_bit (live, regno);
+ bitmap_clear_range (live, REGNO (reg), REG_NREGS (reg));
}
break;
default:
/* Return an OR of MEMREF_NORMAL or MEMREF_VOLATILE for the MEMs in X. */
static int
-find_memory (rtx insn)
+find_memory (rtx_insn *insn)
{
int flags = 0;
subrtx_iterator::array_type array;
if (volatile_insn_p (PATTERN (insn)))
return false;
memrefs_in_across |= find_memory (insn);
- note_stores (PATTERN (insn), find_memory_stores,
- &mem_sets_in_across);
+ note_stores (insn, find_memory_stores, &mem_sets_in_across);
/* This is used just to find sets of the stack pointer. */
memrefs_in_across |= mem_sets_in_across;
trapping_insns_in_across |= may_trap_p (PATTERN (insn));
{
int mem_ref_flags = 0;
int mem_set_flags = 0;
- note_stores (PATTERN (insn), find_memory_stores, &mem_set_flags);
+ note_stores (insn, find_memory_stores, &mem_set_flags);
mem_ref_flags = find_memory (insn);
/* Catch sets of the stack pointer. */
mem_ref_flags |= mem_set_flags;
if (bitmap_intersect_p (merge_set, test_use)
|| bitmap_intersect_p (merge_use, test_set))
break;
-#ifdef HAVE_cc0
- if (!sets_cc0_p (insn))
-#endif
+ if (!HAVE_cc0 || !sets_cc0_p (insn))
max_to = insn;
}
next = NEXT_INSN (insn);
if (NONDEBUG_INSN_P (insn))
{
if (!bitmap_intersect_p (test_set, local_merge_live)
-#ifdef HAVE_cc0
- && !sets_cc0_p (insn)
-#endif
- )
+ && (!HAVE_cc0 || !sets_cc0_p (insn)))
{
max_to = insn;
break;
df_md_free_bb_info (basic_block bb ATTRIBUTE_UNUSED,
void *vbb_info)
{
- struct df_md_bb_info *bb_info = (struct df_md_bb_info *) vbb_info;
+ class df_md_bb_info *bb_info = (class df_md_bb_info *) vbb_info;
if (bb_info)
{
bitmap_clear (&bb_info->kill);
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_md_bb_info *bb_info = df_md_get_bb_info (bb_index);
+ class df_md_bb_info *bb_info = df_md_get_bb_info (bb_index);
/* When bitmaps are already initialized, just clear them. */
if (bb_info->init.obstack)
{
}
static void
-df_md_bb_local_compute_process_def (struct df_md_bb_info *bb_info,
+df_md_bb_local_compute_process_def (class df_md_bb_info *bb_info,
df_ref def,
int top_flag)
{
df_md_bb_local_compute (unsigned int bb_index)
{
basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
- struct df_md_bb_info *bb_info = df_md_get_bb_info (bb_index);
+ class df_md_bb_info *bb_info = df_md_get_bb_info (bb_index);
rtx_insn *insn;
/* Artificials are only hard regs. */
df_md_bb_local_compute (bb_index);
}
- bitmap_clear (&seen_in_insn);
+ bitmap_release (&seen_in_insn);
frontiers = XNEWVEC (bitmap_head, last_basic_block_for_fn (cfun));
FOR_ALL_BB_FN (bb, cfun)
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_md_bb_info *bb_info = df_md_get_bb_info (bb_index);
+ class df_md_bb_info *bb_info = df_md_get_bb_info (bb_index);
gcc_assert (bb_info);
bitmap_clear (&bb_info->in);
bitmap_clear (&bb_info->out);
df_md_transfer_function (int bb_index)
{
basic_block bb = BASIC_BLOCK_FOR_FN (cfun, bb_index);
- struct df_md_bb_info *bb_info = df_md_get_bb_info (bb_index);
+ class df_md_bb_info *bb_info = df_md_get_bb_info (bb_index);
bitmap in = &bb_info->in;
bitmap out = &bb_info->out;
bitmap gen = &bb_info->gen;
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
- struct df_md_bb_info *bb_info = df_md_get_bb_info (bb_index);
+ class df_md_bb_info *bb_info = df_md_get_bb_info (bb_index);
bitmap_copy (&bb_info->in, &bb_info->init);
df_md_transfer_function (bb_index);
static void
df_md_confluence_0 (basic_block bb)
{
- struct df_md_bb_info *bb_info = df_md_get_bb_info (bb->index);
+ class df_md_bb_info *bb_info = df_md_get_bb_info (bb->index);
bitmap_copy (&bb_info->in, &bb_info->init);
}
return false;
if (e->flags & EDGE_EH)
- return bitmap_ior_and_compl_into (op1, op2,
- regs_invalidated_by_call_regset);
+ {
+ /* Conservatively treat partially-clobbered registers as surviving
+ across the edge; they might or might not, depending on what mode
+ they have. */
+ bitmap_view<HARD_REG_SET> eh_kills (eh_edge_abi.full_reg_clobbers ());
+ return bitmap_ior_and_compl_into (op1, op2, eh_kills);
+ }
else
return bitmap_ior_into (op1, op2);
}
struct df_md_problem_data *problem_data
= (struct df_md_problem_data *) df_md->problem_data;
+ bitmap_release (&df_md_scratch);
bitmap_obstack_release (&problem_data->md_bitmaps);
free (problem_data);
df_md->problem_data = NULL;
static void
df_md_top_dump (basic_block bb, FILE *file)
{
- struct df_md_bb_info *bb_info = df_md_get_bb_info (bb->index);
+ class df_md_bb_info *bb_info = df_md_get_bb_info (bb->index);
if (!bb_info)
return;
static void
df_md_bottom_dump (basic_block bb, FILE *file)
{
- struct df_md_bb_info *bb_info = df_md_get_bb_info (bb->index);
+ class df_md_bb_info *bb_info = df_md_get_bb_info (bb->index);
if (!bb_info)
return;
df_print_regset (file, &bb_info->out);
}
-static struct df_problem problem_MD =
+static const struct df_problem problem_MD =
{
DF_MD, /* Problem id. */
DF_FORWARD, /* Direction. */
NULL, /* Incremental solution verify start. */
NULL, /* Incremental solution verify end. */
NULL, /* Dependent problem. */
- sizeof (struct df_md_bb_info),/* Size of entry of block_info array. */
+ sizeof (class df_md_bb_info),/* Size of entry of block_info array. */
TV_DF_MD, /* Timing variable. */
false /* Reset blocks on dropping out of blocks_to_analyze. */
};
projects / thirdparty / gcc.git / blobdiff