Revert "Revert "Inline methods with loops.""

Bug: 26689526

This reverts commit 451ad8d1be9a1949ea3c3e3a713a9e76198a8b2d.

Change-Id: If484fe4c0744254dd7568fd5006e574d621a1855
diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index 7067aab..dfd0a63 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -689,6 +689,10 @@
   void Add(HBasicBlock* block);
   void Remove(HBasicBlock* block);
 
+  void ClearAllBlocks() {
+    blocks_.ClearAllBits();
+  }
+
  private:
   // Internal recursive implementation of `Populate`.
   void PopulateRecursive(HBasicBlock* block);