Add new method

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13050 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/LoopInfo.cpp b/lib/Analysis/LoopInfo.cpp
index 270a142ad2da70b7b8aa91fdb5f0254d614341e1..181cae0ab071e81b60a49cdc40f1f7e2dcb0e145 100644 (file)
--- a/lib/Analysis/LoopInfo.cpp
+++ b/lib/Analysis/LoopInfo.cpp
@@ -56,6 +56,14 @@ unsigned Loop::getNumBackEdges() const {
   return NumBackEdges;
 }
 
+/// isLoopInvariant - Return true if the specified value is loop invariant
+///
+bool Loop::isLoopInvariant(Value *V) const {
+  if (Instruction *I = dyn_cast<Instruction>(V))
+    return !contains(I->getParent());
+  return true;  // All non-instructions are loop invariant
+}
+
 void Loop::print(std::ostream &OS, unsigned Depth) const {
   OS << std::string(Depth*2, ' ') << "Loop Containing: ";