1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 5cbb5fac8a..6e5dfbb35e 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -132,6 +132,12 @@ bool SCEV::isOne() const {
   return false;
 }
 
+bool SCEV::isAllOnesValue() const {
+  if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(this))
+    return SC->getValue()->isAllOnesValue();
+  return false;
+}
+
 SCEVCouldNotCompute::SCEVCouldNotCompute() :
   SCEV(scCouldNotCompute) {}