diff options
Diffstat (limited to 'gcc/gimple.c')
| -rw-r--r-- | gcc/gimple.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/gcc/gimple.c b/gcc/gimple.c index e275dfc..fc81e52 100644 --- a/gcc/gimple.c +++ b/gcc/gimple.c @@ -2946,18 +2946,30 @@ preprocess_case_label_vec_for_gimple (vec<tree> labels, high = CASE_LOW (labels[len - 1]); if (tree_int_cst_equal (high, TYPE_MAX_VALUE (index_type))) { + tree widest_label = labels[0]; for (i = 1; i < len; i++) { high = CASE_LOW (labels[i]); low = CASE_HIGH (labels[i - 1]); if (!low) low = CASE_LOW (labels[i - 1]); + + if (CASE_HIGH (labels[i]) != NULL_TREE + && (CASE_HIGH (widest_label) == NULL_TREE + || wi::gtu_p (wi::sub (CASE_HIGH (labels[i]), + CASE_LOW (labels[i])), + wi::sub (CASE_HIGH (widest_label), + CASE_LOW (widest_label))))) + widest_label = labels[i]; + if (wi::add (low, 1) != high) break; } if (i == len) { - tree label = CASE_LABEL (labels[0]); + /* Designate the label with the widest range to be the + default label. */ + tree label = CASE_LABEL (widest_label); default_case = build_case_label (NULL_TREE, NULL_TREE, label); } |