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predict.c (maybe_hot_frequency_p): Break out of...

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* predict.c (maybe_hot_frequency_p): Break out of...
	(maybe_hot_bb_p): ... here.
	(maybe_hot_edge_p): New.
	* tree-ssa-coalesce.c (coalesce_cost_edge): Compute cost based on edge.
	* basic-block.h (maybe_hot_edge_p): Declare.

From-SVN: r136282
This commit is contained in:
Jan Hubicka 2008-06-02 18:36:49 +02:00 • committed by Jan Hubicka
parent 79711d26db
commit 3250d72489
4 changed files with 39 additions and 10 deletions
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8
gcc/ChangeLog
View file

@ -1,3 +1,11 @@
2008-05-26 Jan Hubicka <jh@suse.cz>
* predict.c (maybe_hot_frequency_p): Break out of...
(maybe_hot_bb_p): ... here.
(maybe_hot_edge_p): New.
* tree-ssa-coalesce.c (coalesce_cost_edge): Compute cost based on edge.
* basic-block.h (maybe_hot_edge_p): Declare.
2008-05-31 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.md (*cmpfp_<mode>): Enable for optimize_size.

1
gcc/basic-block.h
View file

@ -827,6 +827,7 @@ extern void compute_available (sbitmap *, sbitmap *, sbitmap *, sbitmap *);
/* In predict.c */
extern bool maybe_hot_bb_p (const_basic_block);
extern bool maybe_hot_edge_p (edge);
extern bool probably_cold_bb_p (const_basic_block);
extern bool probably_never_executed_bb_p (const_basic_block);
extern bool tree_predicted_by_p (const_basic_block, enum br_predictor);

38
gcc/predict.c
View file

@ -107,6 +107,22 @@ static const struct predictor_info predictor_info[]= {
};
#undef DEF_PREDICTOR
/* Return TRUE if frequency FREQ is considered to be hot. */
static bool
maybe_hot_frequency_p (int freq)
{
if (!profile_info || !flag_branch_probabilities)
{
if (cfun->function_frequency == FUNCTION_FREQUENCY_UNLIKELY_EXECUTED)
return false;
if (cfun->function_frequency == FUNCTION_FREQUENCY_HOT)
return true;
}
if (freq < BB_FREQ_MAX / PARAM_VALUE (HOT_BB_FREQUENCY_FRACTION))
return false;
return true;
}
/* Return true in case BB can be CPU intensive and should be optimized
for maximal performance. */
@ -117,16 +133,20 @@ maybe_hot_bb_p (const_basic_block bb)
&& (bb->count
< profile_info->sum_max / PARAM_VALUE (HOT_BB_COUNT_FRACTION)))
return false;
if (!profile_info || !flag_branch_probabilities)
{
if (cfun->function_frequency == FUNCTION_FREQUENCY_UNLIKELY_EXECUTED)
return false;
if (cfun->function_frequency == FUNCTION_FREQUENCY_HOT)
return true;
}
if (bb->frequency < BB_FREQ_MAX / PARAM_VALUE (HOT_BB_FREQUENCY_FRACTION))
return maybe_hot_frequency_p (bb->frequency);
}
/* Return true in case BB can be CPU intensive and should be optimized
for maximal performance. */
bool
maybe_hot_edge_p (edge e)
{
if (profile_info && flag_branch_probabilities
&& (e->count
< profile_info->sum_max / PARAM_VALUE (HOT_BB_COUNT_FRACTION)))
return false;
return true;
return maybe_hot_frequency_p (EDGE_FREQUENCY (e));
}
/* Return true in case BB is cold and should be optimized for size. */

2
gcc/tree-ssa-coalesce.c
View file

@ -114,7 +114,7 @@ coalesce_cost_edge (edge e)
return MUST_COALESCE_COST;
return coalesce_cost (EDGE_FREQUENCY (e),
maybe_hot_bb_p (e->src),
maybe_hot_edge_p (e),
EDGE_CRITICAL_P (e));
}