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df-problems.c (df_set_seen, [...]): Delete.

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2009-06-27  Paolo Bonzini  <bonzini@gnu.org>

        * df-problems.c (df_set_seen, df_unset_seen): Delete.
        (df_rd_local_compute, df_md_local_compute): Inline them.

        (df_md_scratch): New.
        (df_md_alloc, df_md_free): Allocate/free it.
        (df_md_local_compute): Only include live registers in init.
        (df_md_transfer_function): Prune the in-set computed by
        the confluence function, and the gen-set too.

From-SVN: r149011
This commit is contained in:
Paolo Bonzini 2009-06-27 14:50:00 +00:00 committed by Paolo Bonzini
parent c6741572cf
commit 4c78c26b80
2 changed files with 40 additions and 28 deletions
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13
gcc/ChangeLog
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@ -1,4 +1,15 @@
2009-06-07 Paolo Bonzini <bonzini@gnu.org>
2009-06-27 Paolo Bonzini <bonzini@gnu.org>
* df-problems.c (df_set_seen, df_unset_seen): Delete.
(df_rd_local_compute, df_md_local_compute): Inline them.
(df_md_scratch): New.
(df_md_alloc, df_md_free): Allocate/free it.
(df_md_local_compute): Only include live registers in init.
(df_md_transfer_function): Prune the in-set computed by
the confluence function, and the gen-set too.
2009-06-27 Paolo Bonzini <bonzini@gnu.org>
PR rtl-optimization/26854
* timevar.def: Remove TV_DF_RU, add TV_DF_MD.

55
gcc/df-problems.c
View File

@ -157,27 +157,6 @@ df_print_bb_index (basic_block bb, FILE *file)
fprintf (file, ")\n");
}
/* Make sure that the seen_in_insn and seen_in_block sbitmaps are set
up correctly. */
static void
df_set_seen (void)
{
seen_in_block = BITMAP_ALLOC (&df_bitmap_obstack);
seen_in_insn = BITMAP_ALLOC (&df_bitmap_obstack);
}
static void
df_unset_seen (void)
{
BITMAP_FREE (seen_in_block);
BITMAP_FREE (seen_in_insn);
}
/*----------------------------------------------------------------------------
REACHING DEFINITIONS
@ -487,7 +466,8 @@ df_rd_local_compute (bitmap all_blocks)
bitmap sparse_invalidated = problem_data->sparse_invalidated_by_call;
bitmap dense_invalidated = problem_data->dense_invalidated_by_call;
df_set_seen ();
seen_in_block = BITMAP_ALLOC (&df_bitmap_obstack);
seen_in_insn = BITMAP_ALLOC (&df_bitmap_obstack);
df_maybe_reorganize_def_refs (DF_REF_ORDER_BY_REG);
@ -506,7 +486,9 @@ df_rd_local_compute (bitmap all_blocks)
DF_DEFS_BEGIN (regno),
DF_DEFS_COUNT (regno));
}
df_unset_seen ();
BITMAP_FREE (seen_in_block);
BITMAP_FREE (seen_in_insn);
}
@ -4001,6 +3983,10 @@ df_simulate_finalize_forwards (basic_block bb, bitmap live)
propagating the information to BB3's successors.
---------------------------------------------------------------------------*/
/* Scratch var used by transfer functions. This is used to do md analysis
only for live registers. */
static bitmap df_md_scratch;
/* Set basic block info. */
static void
@ -4044,6 +4030,7 @@ df_md_alloc (bitmap all_blocks)
sizeof (struct df_md_bb_info), 50);
df_grow_bb_info (df_md);
df_md_scratch = BITMAP_ALLOC (NULL);
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi)
{
@ -4198,14 +4185,14 @@ df_md_local_compute (bitmap all_blocks)
basic_block bb;
bitmap *frontiers;
df_set_seen ();
seen_in_insn = BITMAP_ALLOC (NULL);
EXECUTE_IF_SET_IN_BITMAP (all_blocks, 0, bb_index, bi1)
{
df_md_bb_local_compute (bb_index);
}
df_unset_seen ();
BITMAP_FREE (seen_in_insn);
frontiers = XNEWVEC (bitmap, last_basic_block);
FOR_ALL_BB (bb)
@ -4219,8 +4206,10 @@ df_md_local_compute (bitmap all_blocks)
bitmap kill = df_md_get_bb_info (bb_index)->kill;
EXECUTE_IF_SET_IN_BITMAP (frontiers[bb_index], 0, df_bb_index, bi2)
{
basic_block bb = BASIC_BLOCK (df_bb_index);
if (bitmap_bit_p (all_blocks, df_bb_index))
bitmap_ior_into (df_md_get_bb_info (df_bb_index)->init, kill);
bitmap_ior_and_into (df_md_get_bb_info (df_bb_index)->init, kill,
df_get_live_in (bb));
}
}
@ -4250,13 +4239,24 @@ df_md_reset (bitmap all_blocks)
static bool
df_md_transfer_function (int bb_index)
{
basic_block bb = BASIC_BLOCK (bb_index);
struct 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;
bitmap kill = bb_info->kill;
return bitmap_ior_and_compl (out, gen, in, kill);
/* We need to use a scratch set here so that the value returned from
this function invocation properly reflects if the sets changed in
a significant way; i.e. not just because the live set was anded
in. */
bitmap_and (df_md_scratch, gen, df_get_live_out (bb));
/* Multiple definitions of a register are not relevant if it is not
used. Thus we trim the result to the places where it is live. */
bitmap_and_into (in, df_get_live_in (bb));
return bitmap_ior_and_compl (out, df_md_scratch, in, kill);
}
/* Initialize the solution bit vectors for problem. */
@ -4319,6 +4319,7 @@ df_md_free (void)
}
}
BITMAP_FREE (df_md_scratch);
free_alloc_pool (df_md->block_pool);
df_md->block_info_size = 0;