commit 18a96bb07fd92d618fe9cae09d101e16a9387361
author Dan Gohman <gohman@apple.com> Wed Jun 24 00:30:26 2009 +0000
committer Dan Gohman <gohman@apple.com> Wed Jun 24 00:30:26 2009 +0000
tree d542753dcdc15b25ab98aebf7007719fd59e2133
parent f522a4e03405182ce4d79ca71195d939a5fec3cb

Add an isAllOnesValue utility function, similar to isZero and isOne.

llvm-svn: 74032

llvm/lib/Analysis/ScalarEvolution.cpp

diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
index 5cbb5fa..6e5dfbb 100644
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/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) {}