Add an isAllOnesValue utility function, similar to isZero and isOne.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74032 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 5cbb5fa..6e5dfbb 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -132,6 +132,12 @@
return false;
}
+bool SCEV::isAllOnesValue() const {
+ if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(this))
+ return SC->getValue()->isAllOnesValue();
+ return false;
+}
+
SCEVCouldNotCompute::SCEVCouldNotCompute() :
SCEV(scCouldNotCompute) {}