| author | "Yann E. MORIN" <yann.morin.1998@free.fr> |
| Tue Jul 31 22:27:29 2012 +0200 (2012-07-31) | |
| changeset 3018 | 7776e8369284 |
| parent 431 | 8bde4c6ea47a |
| permissions | -rw-r--r-- |
| yann@313 | 1 |
diff -durN gcc-4.2.1.orig/gcc/stmt.c gcc-4.2.1/gcc/stmt.c |
| yann@313 | 2 |
--- gcc-4.2.1.orig/gcc/stmt.c 2007-07-19 05:25:32.000000000 +0200 |
| yann@313 | 3 |
+++ gcc-4.2.1/gcc/stmt.c 2007-08-03 20:37:19.000000000 +0200 |
| yann@313 | 4 |
@@ -2512,7 +2512,11 @@ |
| yann@313 | 5 |
use_cost_table |
| yann@313 | 6 |
= (TREE_CODE (orig_type) != ENUMERAL_TYPE |
| yann@313 | 7 |
&& estimate_case_costs (case_list)); |
| yann@313 | 8 |
- balance_case_nodes (&case_list, NULL); |
| yann@313 | 9 |
+ /* When optimizing for size, we want a straight list to avoid |
| yann@313 | 10 |
+ jumps as much as possible. This basically creates an if-else |
| yann@313 | 11 |
+ chain. */ |
| yann@313 | 12 |
+ if (!optimize_size) |
| yann@313 | 13 |
+ balance_case_nodes (&case_list, NULL); |
| yann@313 | 14 |
emit_case_nodes (index, case_list, default_label, index_type); |
| yann@313 | 15 |
emit_jump (default_label); |
| yann@313 | 16 |
} |
| yann@313 | 17 |
@@ -3070,6 +3074,7 @@ |
| yann@313 | 18 |
{
|
| yann@313 | 19 |
if (!node_has_low_bound (node, index_type)) |
| yann@313 | 20 |
{
|
| yann@313 | 21 |
+ if (!optimize_size) /* don't jl to the .default_label. */ |
| yann@313 | 22 |
emit_cmp_and_jump_insns (index, |
| yann@313 | 23 |
convert_modes |
| yann@313 | 24 |
(mode, imode, |