diff options
Diffstat (limited to 'gcc/tree-cfg.c')
| -rw-r--r-- | gcc/tree-cfg.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c index 4bf00df..8600a99 100644 --- a/gcc/tree-cfg.c +++ b/gcc/tree-cfg.c @@ -937,6 +937,7 @@ group_case_labels (void) tree labels = SWITCH_LABELS (stmt); int old_size = TREE_VEC_LENGTH (labels); int i, j, new_size = old_size; + tree default_label = TREE_VEC_ELT (labels, old_size - 1); /* Look for possible opportunities to merge cases. Ignore the last element of the label vector because it @@ -950,8 +951,18 @@ group_case_labels (void) if (! base_case) abort (); - type = TREE_TYPE (CASE_LOW (base_case)); base_label = CASE_LABEL (base_case); + + /* Discard cases that have the same destination as the + default case. */ + if (base_label == default_label) + { + TREE_VEC_ELT (labels, i) = NULL_TREE; + i++; + continue; + } + + type = TREE_TYPE (CASE_LOW (base_case)); base_high = CASE_HIGH (base_case) ? CASE_HIGH (base_case) : CASE_LOW (base_case); |