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predict.def: Set outcomes according to more recent results.

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* predict.def: Set outcomes according to more recent results.
	(PRED_LOOP_CONDITION, PRED_LOOP_PRECONDITIONING, PRED_LOOP_HEADER):
	Remove dead predictors.
	* predict.c (return_prediction): Fix pasto.

From-SVN: r122347
This commit is contained in:
Jan Hubicka 2007-02-27 01:07:03 +01:00 committed by Jan Hubicka
parent 4898239452
commit 75b6bb627c
3 changed files with 19 additions and 23 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2007-02-26 Jan Hubicka <jh@suse.cz>
* predict.def: Set outcomes according to more recent results.
(PRED_LOOP_CONDITION, PRED_LOOP_PRECONDITIONING, PRED_LOOP_HEADER):
Remove dead predictors.
* predict.c (return_prediction): Fix pasto.
2007-02-27 Bernd Schmidt <bernd.schmidt@analog.com>
* loop-iv.c (simplify_using_initial_values): Fix oversight in previous

2
gcc/predict.c
View File

@ -1152,7 +1152,7 @@ return_prediction (tree val, enum prediction *prediction)
&& (!integer_zerop (val) && !integer_onep (val)))
{
*prediction = TAKEN;
return PRED_NEGATIVE_RETURN;
return PRED_CONST_RETURN;
}
}
return PRED_NO_PREDICTION;

33
gcc/predict.def
View File

@ -74,41 +74,30 @@ DEF_PREDICTOR (PRED_NORETURN, "noreturn call", HITRATE (99),
PRED_FLAG_FIRST_MATCH)
/* Loopback edge is taken. */
DEF_PREDICTOR (PRED_LOOP_BRANCH, "loop branch", HITRATE (89),
DEF_PREDICTOR (PRED_LOOP_BRANCH, "loop branch", HITRATE (86),
PRED_FLAG_FIRST_MATCH)
/* Edge causing loop to terminate is probably not taken. */
DEF_PREDICTOR (PRED_LOOP_EXIT, "loop exit", HITRATE (90),
DEF_PREDICTOR (PRED_LOOP_EXIT, "loop exit", HITRATE (91),
PRED_FLAG_FIRST_MATCH)
/* Condition emitted by preconditiong code to ensure that variable
setting number of iterations is greater than initial value of iterator. */
DEF_PREDICTOR (PRED_LOOP_CONDITION, "loop condition", PROB_VERY_LIKELY, 0)
/* Preconditioning makes linear list of branches. */
DEF_PREDICTOR (PRED_LOOP_PRECONDITIONING, "loop preconditioning", PROB_VERY_LIKELY, 0)
/* Copied condition for the first iteration of loop is probably true. */
DEF_PREDICTOR (PRED_LOOP_HEADER, "loop header", HITRATE (64), 0)
/* Pointers are usually not NULL. */
DEF_PREDICTOR (PRED_POINTER, "pointer", HITRATE (81), 0)
DEF_PREDICTOR (PRED_TREE_POINTER, "pointer (on trees)", HITRATE (81), 0)
DEF_PREDICTOR (PRED_POINTER, "pointer", HITRATE (85), 0)
DEF_PREDICTOR (PRED_TREE_POINTER, "pointer (on trees)", HITRATE (85), 0)
/* NE is probable, EQ not etc... */
DEF_PREDICTOR (PRED_OPCODE_POSITIVE, "opcode values positive", HITRATE (79), 0)
DEF_PREDICTOR (PRED_OPCODE_NONEQUAL, "opcode values nonequal", HITRATE (71), 0)
DEF_PREDICTOR (PRED_FPOPCODE, "fp_opcode", HITRATE (90), 0)
DEF_PREDICTOR (PRED_TREE_OPCODE_POSITIVE, "opcode values positive (on trees)", HITRATE (79), 0)
DEF_PREDICTOR (PRED_TREE_OPCODE_NONEQUAL, "opcode values nonequal (on trees)", HITRATE (71), 0)
DEF_PREDICTOR (PRED_TREE_OPCODE_POSITIVE, "opcode values positive (on trees)", HITRATE (70), 0)
DEF_PREDICTOR (PRED_TREE_OPCODE_NONEQUAL, "opcode values nonequal (on trees)", HITRATE (69), 0)
DEF_PREDICTOR (PRED_TREE_FPOPCODE, "fp_opcode (on trees)", HITRATE (90), 0)
/* Branch guarding call is probably taken. */
DEF_PREDICTOR (PRED_CALL, "call", HITRATE (70), 0)
DEF_PREDICTOR (PRED_CALL, "call", HITRATE (69), 0)
/* Branch causing function to terminate is probably not taken. */
DEF_PREDICTOR (PRED_EARLY_RETURN, "early return", HITRATE (67), 0)
DEF_PREDICTOR (PRED_TREE_EARLY_RETURN, "early return (on trees)", HITRATE (67), 0)
DEF_PREDICTOR (PRED_TREE_EARLY_RETURN, "early return (on trees)", HITRATE (45), 0)
/* Branch containing goto is probably not taken. */
DEF_PREDICTOR (PRED_GOTO, "goto", HITRATE (70), 0)
@ -117,10 +106,10 @@ DEF_PREDICTOR (PRED_GOTO, "goto", HITRATE (70), 0)
DEF_PREDICTOR (PRED_CONST_RETURN, "const return", HITRATE (95), 0)
/* Branch ending with return negative constant is probably not taken. */
DEF_PREDICTOR (PRED_NEGATIVE_RETURN, "negative return", HITRATE (96), 0)
DEF_PREDICTOR (PRED_NEGATIVE_RETURN, "negative return", HITRATE (77), 0)
/* Branch ending with return; is probably not taken */
DEF_PREDICTOR (PRED_NULL_RETURN, "null return", HITRATE (90), 0)
DEF_PREDICTOR (PRED_NULL_RETURN, "null return", HITRATE (96), 0)
/* Branches to a mudflap bounds check are extremely unlikely. */
DEF_PREDICTOR (PRED_MUDFLAP, "mudflap check", HITRATE (99), 0)
DEF_PREDICTOR (PRED_MUDFLAP, "mudflap check", PROB_VERY_LIKELY, 0)