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cfg.c (update_bb_profile_for_threading): Fix profile updating. 

* cfg.c (update_bb_profile_for_threading): Fix profile updating.
	(scale_bbs_frequencies_int): Watch roundoff errors.
	* predict.c (return_prediction): Initialize return_stmt.

From-SVN: r102087
This commit is contained in:
Jan Hubicka 2005-07-16 14:15:27 +02:00 committed by Jan Hubicka
parent 866c78db25
commit 84fc24e8a0
3 changed files with 16 additions and 2 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2005-07-16 Jan Hubicka <jh@suse.cz>
* cfg.c (update_bb_profile_for_threading): Fix profile updating.
(scale_bbs_frequencies_int): Watch roundoff errors.
* predict.c (return_prediction): Initialize return_stmt.
2005-07-16 Jan Hubicka <jh@suse.cz>
* profile.c (rest_of_handle_branch_prob): Fix handling of estimation

10
gcc/cfg.c
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@ -896,7 +896,11 @@ update_bb_profile_for_threading (basic_block bb, int edge_frequency,
int scale = 65536 * REG_BR_PROB_BASE / prob;
FOR_EACH_EDGE (c, ei, bb->succs)
c->probability = (c->probability * scale) / 65536;
{
c->probability = (c->probability * scale) / 65536;
if (c->probability > REG_BR_PROB_BASE)
c->probability = REG_BR_PROB_BASE;
}
}
gcc_assert (bb == taken_edge->src);
@ -917,6 +921,10 @@ scale_bbs_frequencies_int (basic_block *bbs, int nbbs, int num, int den)
{
int i;
edge e;
if (num < 0)
num = 0;
if (num > den)
return;
for (i = 0; i < nbbs; i++)
{
edge_iterator ei;

2
gcc/predict.c
View File

@ -1206,7 +1206,7 @@ return_prediction (tree val, enum prediction *prediction)
static void
apply_return_prediction (int *heads)
{
tree return_stmt;
tree return_stmt = NULL;
tree return_val;
edge e;
tree phi;