diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index 98365db..42d5467 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -1906,6 +1906,13 @@
     if (const FunctionDecl *Fn = dyn_cast<FunctionDecl>(TargetDecl)) {
       AddAttributesFromFunctionProtoType(
           getContext(), FuncAttrs, Fn->getType()->getAs<FunctionProtoType>());
+      if (AttrOnCallSite && Fn->isReplaceableGlobalAllocationFunction()) {
+        // A sane operator new returns a non-aliasing pointer.
+        auto Kind = Fn->getDeclName().getCXXOverloadedOperator();
+        if (getCodeGenOpts().AssumeSaneOperatorNew &&
+            (Kind == OO_New || Kind == OO_Array_New))
+          RetAttrs.addAttribute(llvm::Attribute::NoAlias);
+      }
       const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Fn);
       const bool IsVirtualCall = MD && MD->isVirtual();
       // Don't use [[noreturn]], _Noreturn or [[no_builtin]] for a call to a