diff options
Diffstat (limited to 'gcc/predict.c')
| -rw-r--r-- | gcc/predict.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/gcc/predict.c b/gcc/predict.c index e2f7262..8f50ba0 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -624,8 +624,9 @@ predict_loops (struct loops *loops_info, bool rtlsimpleloops) niter = desc.niter + 1; if (niter == 0) /* We might overflow here. */ niter = desc.niter; - if (niter > MAX_PRED_LOOP_ITERATIONS) - niter = MAX_PRED_LOOP_ITERATIONS; + if (niter + > (unsigned int) PARAM_VALUE (PARAM_MAX_PREDICTED_ITERATIONS)) + niter = PARAM_VALUE (PARAM_MAX_PREDICTED_ITERATIONS); prob = (REG_BR_PROB_BASE - (REG_BR_PROB_BASE + niter /2) / niter); @@ -653,19 +654,17 @@ predict_loops (struct loops *loops_info, bool rtlsimpleloops) if (TREE_CODE (niter) == INTEGER_CST) { int probability; + int max = PARAM_VALUE (PARAM_MAX_PREDICTED_ITERATIONS); if (host_integerp (niter, 1) && tree_int_cst_lt (niter, - build_int_cstu (NULL_TREE, - MAX_PRED_LOOP_ITERATIONS - 1))) + build_int_cstu (NULL_TREE, max - 1))) { HOST_WIDE_INT nitercst = tree_low_cst (niter, 1) + 1; probability = ((REG_BR_PROB_BASE + nitercst / 2) / nitercst); } else - probability = ((REG_BR_PROB_BASE - + MAX_PRED_LOOP_ITERATIONS / 2) - / MAX_PRED_LOOP_ITERATIONS); + probability = ((REG_BR_PROB_BASE + max / 2) / max); predict_edge (exits[j], PRED_LOOP_ITERATIONS, probability); } |