* tree-cfg (group_case_labels): Remove case labels that have the

[pf3gnuchains/gcc-fork.git] / gcc / tree-cfg.c

diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index 4bf00df..8600a99 100644 (file)
--- 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);