[UnJ] Rename hasInvariantIterationCount to hasIterationCountInvariantInParent NFC

This hopefully describes the API of the function more precisely.

llvm-svn: 339762
diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
index e9db472..3560a49 100644
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -1521,8 +1521,8 @@
     return (FalseVal + (TrueVal / 2)) / TrueVal;
 }
 
-bool llvm::hasInvariantIterationCount(Loop *InnerLoop,
-                                      ScalarEvolution &SE) {
+bool llvm::hasIterationCountInvariantInParent(Loop *InnerLoop,
+                                              ScalarEvolution &SE) {
   Loop *OuterL = InnerLoop->getParentLoop();
   if (!OuterL)
     return true;