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* predict.c (combine_predictions_for_insn): Avoid division by zero.

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From-SVN: r48615
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Jakub Jelinek 2002-01-07 22:15:12 +01:00 committed by Jakub Jelinek
parent 2e9513841e
commit 571a03b876
2 changed files with 10 additions and 2 deletions
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gcc/ChangeLog
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@ -1,3 +1,7 @@
2002-01-07 Jakub Jelinek <jakub@redhat.com>
* predict.c (combine_predictions_for_insn): Avoid division by zero.
2002-01-07 Jakub Jelinek <jakub@redhat.com>
* simplify-rtx.c (simplify_plus_minus): Bump n_ops for NOT.

8
gcc/predict.c
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@ -253,8 +253,12 @@ combine_predictions_for_insn (insn, bb)
* (REG_BR_PROB_BASE - probability));
/* Use FP math to avoid overflows of 32bit integers. */
combined_probability = (((double) combined_probability) * probability
* REG_BR_PROB_BASE / d + 0.5);
if (d == 0)
/* If one probability is 0% and one 100%, avoid division by zero. */
combined_probability = REG_BR_PROB_BASE / 2;
else
combined_probability = (((double) combined_probability) * probability
* REG_BR_PROB_BASE / d + 0.5);
}
/* Decide which heuristic to use. In case we didn't match anything,