+2008-01-09 Jan Hubicka <jh@suse.cz>
+
+ PR tree-optimization/34708
+ * tree-inline.c (estimate_num_insns_1): Compute cost of SWITCH_EXPR
+ based on number of case labels.
+ (init_inline_once): Remove switch_cost.
+ * tree-inline.h (eni_weights_d): Remove switch_cost.
+
2008-01-09 Richard Guenther <rguenther@suse.de>
Andrew Pinski <andrew_pinski@playstation.sony.com>
break;
case SWITCH_EXPR:
- /* TODO: Cost of a switch should be derived from the number of
- branches. */
- d->count += d->weights->switch_cost;
+ /* Take into account cost of the switch + guess 2 conditional jumps for
+ each case label.
+
+ TODO: once the switch expansion logic is sufficiently separated, we can
+ do better job on estimating cost of the switch. */
+ d->count += TREE_VEC_LENGTH (SWITCH_LABELS (x)) * 2;
break;
/* Few special cases of expensive operations. This is useful
eni_inlining_weights.call_cost = PARAM_VALUE (PARAM_INLINE_CALL_COST);
eni_inlining_weights.target_builtin_call_cost = 1;
eni_inlining_weights.div_mod_cost = 10;
- eni_inlining_weights.switch_cost = 1;
eni_inlining_weights.omp_cost = 40;
eni_size_weights.call_cost = 1;
eni_size_weights.target_builtin_call_cost = 1;
eni_size_weights.div_mod_cost = 1;
- eni_size_weights.switch_cost = 10;
eni_size_weights.omp_cost = 40;
/* Estimating time for call is difficult, since we have no idea what the
eni_time_weights.call_cost = 10;
eni_time_weights.target_builtin_call_cost = 10;
eni_time_weights.div_mod_cost = 10;
- eni_time_weights.switch_cost = 4;
eni_time_weights.omp_cost = 40;
}