Index: include/llvm/IR/IntrinsicInst.h
===================================================================
--- include/llvm/IR/IntrinsicInst.h
+++ include/llvm/IR/IntrinsicInst.h
@@ -357,6 +357,10 @@
       return getArgOperand(3)->getType();
     }
 
+    // Query for whether the instruction is one of the unordered element
+    // atomic variants of memory intrinsic.
+    bool isElementAtomic() const { return false; }
+
     // Methods for support type inquiry through isa, cast, and dyn_cast:
     static inline bool classof(const IntrinsicInst *I) {
       switch (I->getIntrinsicID()) {