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predict.c (compute_function_frequency): Export. 

* predict.c (compute_function_frequency): Export.
	* predict.h (compute_function_frequency): Declare.
	* tree-optimize.c (execute_fixup_cfg): Rescale frequencies.

From-SVN: r154291
This commit is contained in:
Jan Hubicka 2009-11-18 14:09:15 +01:00 committed by Jan Hubicka
parent 8b2205027d
commit 965b98d04b
4 changed files with 49 additions and 28 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2009-11-18 Jan Hubicka <jh@suse.cz>
* predict.c (compute_function_frequency): Export.
* predict.h (compute_function_frequency): Declare.
* tree-optimize.c (execute_fixup_cfg): Rescale frequencies.
2009-11-18 Martin Jambor <mjambor@suse.cz>
* passes.c (ipa_write_summaries): Call renumber_gimple_stmt_uids

3
gcc/predict.c
View File

@ -77,7 +77,6 @@ static sreal real_zero, real_one, real_almost_one, real_br_prob_base,
static void combine_predictions_for_insn (rtx, basic_block);
static void dump_prediction (FILE *, enum br_predictor, int, basic_block, int);
static void predict_paths_leading_to (basic_block, enum br_predictor, enum prediction);
static void compute_function_frequency (void);
static void choose_function_section (void);
static bool can_predict_insn_p (const_rtx);
@ -2145,7 +2144,7 @@ estimate_bb_frequencies (void)
}
/* Decide whether function is hot, cold or unlikely executed. */
static void
void
compute_function_frequency (void)
{
basic_block bb;

1
gcc/predict.h
View File

@ -41,5 +41,6 @@ extern void estimate_bb_frequencies (void);
extern const char *predictor_name (enum br_predictor);
extern tree build_predict_expr (enum br_predictor, enum prediction);
extern void tree_estimate_probability (void);
extern void compute_function_frequency (void);
#endif /* GCC_PREDICT_H */

67
gcc/tree-optimize.c
View File

@ -245,36 +245,51 @@ execute_fixup_cfg (void)
basic_block bb;
gimple_stmt_iterator gsi;
int todo = gimple_in_ssa_p (cfun) ? TODO_verify_ssa : 0;
gcov_type count_scale;
edge e;
edge_iterator ei;
if (cfun->eh)
FOR_EACH_BB (bb)
{
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
{
gimple stmt = gsi_stmt (gsi);
tree decl = is_gimple_call (stmt)
? gimple_call_fndecl (stmt)
: NULL;
if (ENTRY_BLOCK_PTR->count)
count_scale = (cgraph_node (current_function_decl)->count * REG_BR_PROB_BASE
+ ENTRY_BLOCK_PTR->count / 2) / ENTRY_BLOCK_PTR->count;
else
count_scale = REG_BR_PROB_BASE;
if (decl
&& gimple_call_flags (stmt) & (ECF_CONST
| ECF_PURE
| ECF_LOOPING_CONST_OR_PURE))
{
if (gimple_in_ssa_p (cfun))
{
todo |= TODO_update_ssa | TODO_cleanup_cfg;
mark_symbols_for_renaming (stmt);
update_stmt (stmt);
}
}
FOR_EACH_BB (bb)
{
bb->count = (bb->count * count_scale
+ REG_BR_PROB_BASE / 2) / REG_BR_PROB_BASE;
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
{
gimple stmt = gsi_stmt (gsi);
tree decl = is_gimple_call (stmt)
? gimple_call_fndecl (stmt)
: NULL;
maybe_clean_eh_stmt (stmt);
}
if (decl
&& gimple_call_flags (stmt) & (ECF_CONST
| ECF_PURE
| ECF_LOOPING_CONST_OR_PURE))
{
if (gimple_in_ssa_p (cfun))
{
todo |= TODO_update_ssa | TODO_cleanup_cfg;
mark_symbols_for_renaming (stmt);
update_stmt (stmt);
}
}
if (gimple_purge_dead_eh_edges (bb))
todo |= TODO_cleanup_cfg;
}
maybe_clean_eh_stmt (stmt);
}
if (gimple_purge_dead_eh_edges (bb))
todo |= TODO_cleanup_cfg;
FOR_EACH_EDGE (e, ei, bb->succs)
e->count = (e->count * count_scale
+ REG_BR_PROB_BASE / 2) / REG_BR_PROB_BASE;
}
if (count_scale != REG_BR_PROB_BASE)
compute_function_frequency ();
/* Dump a textual representation of the flowgraph. */
if (dump_file)