Do not use ETForest as well as DomiantorTree. DominatorTree is sufficient.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37501 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/include/llvm/Analysis/Dominators.h b/include/llvm/Analysis/Dominators.h
index 8530766..f98db6f 100644
--- a/include/llvm/Analysis/Dominators.h
+++ b/include/llvm/Analysis/Dominators.h
@@ -142,6 +142,16 @@ protected:
     return getNode(BB);
   }
 
+  /// getIDomBlock - return basic block BB's immediate domiantor basic block.
+  ///
+  BasicBlock *getIDomBlock(BasicBlock *BB) {
+    DomTreeNode *N = getNode(BB);
+    assert (N && "Missing dominator tree node");
+    DomTreeNode *I = N->getIDom();
+    assert (N && "Missing immediate dominator");
+    return I->getBlock();
+  }
+
   /// getRootNode - This returns the entry node for the CFG of the function.  If
   /// this tree represents the post-dominance relations for a function, however,
   /// this root may be a node with the block == NULL.  This is the case when