Rename a helper function, NFC.

llvm-svn: 295918
diff --git a/clang/lib/CodeGen/CGExprCXX.cpp b/clang/lib/CodeGen/CGExprCXX.cpp
index 3751ef1..29c307b 100644
--- a/clang/lib/CodeGen/CGExprCXX.cpp
+++ b/clang/lib/CodeGen/CGExprCXX.cpp
@@ -292,7 +292,7 @@
 
   SanitizerSet SkippedChecks;
   if (const auto *CMCE = dyn_cast<CXXMemberCallExpr>(CE))
-    if (CanElideObjectPointerNullCheck(CMCE->getImplicitObjectArgument()))
+    if (IsDeclRefOrWrappedCXXThis(CMCE->getImplicitObjectArgument()))
       SkippedChecks.set(SanitizerKind::Null, true);
   EmitTypeCheck(
       isa<CXXConstructorDecl>(CalleeDecl) ? CodeGenFunction::TCK_ConstructorCall