diff --git a/clang/lib/CodeGen/CGAtomic.cpp b/clang/lib/CodeGen/CGAtomic.cpp
index cc85375f08dd..e5c5e5babf23 100644
--- a/clang/lib/CodeGen/CGAtomic.cpp
+++ b/clang/lib/CodeGen/CGAtomic.cpp
@@ -1730,11 +1730,6 @@ AtomicInfo::EmitAtomicCompareExchangeLibcall(llvm::Value *ExpectedAddr,
 std::pair<RValue, llvm::Value *> AtomicInfo::EmitAtomicCompareExchange(
     RValue Expected, RValue Desired, llvm::AtomicOrdering Success,
     llvm::AtomicOrdering Failure, bool IsWeak) {
-  if (isStrongerThan(Failure, Success))
-    // Don't assert on undefined behavior "failure argument shall be no stronger
-    // than the success argument".
-    Failure = llvm::AtomicCmpXchgInst::getStrongestFailureOrdering(Success);
-
   // Check whether we should use a library call.
   if (shouldUseLibcall()) {
     // Produce a source address.