PR target/29777

[pf3gnuchains/gcc-fork.git] / gcc / cfganal.c

diff --git a/gcc/cfganal.c b/gcc/cfganal.c
index 835703f..467c399 100644 (file)
--- a/gcc/cfganal.c
+++ b/gcc/cfganal.c
@@ -1054,6 +1054,8 @@ compute_dominance_frontiers_1 (bitmap *frontiers)
              domsb = get_immediate_dominator (CDI_DOMINATORS, b);
              while (runner != domsb)
                {
+                 if (bitmap_bit_p (frontiers[runner->index], b->index))
+                   break;
                  bitmap_set_bit (frontiers[runner->index],
                                  b->index);
                  runner = get_immediate_dominator (CDI_DOMINATORS,