diff --git a/lib/IRGen/GenEnum.cpp b/lib/IRGen/GenEnum.cpp
index e63bbf649c63b..8b4d17178ea06 100644
--- a/lib/IRGen/GenEnum.cpp
+++ b/lib/IRGen/GenEnum.cpp
@@ -3283,10 +3283,7 @@ namespace {
                             bool zeroizeIfSensitive) const override {
       if (!ElementsAreABIAccessible) {
         emitInitializeWithTakeCall(IGF, T, dest, src);
-      } else if (isOutlined || T.hasParameterizedExistential() ||
-                 (getPayloadTypeInfo().isFixedSize() && // can use memcpy
-                  getPayloadTypeInfo().
-                  isBitwiseTakable(ResilienceExpansion::Maximal))) {
+      } else if (isOutlined || T.hasParameterizedExistential()) {
         emitIndirectInitialize(IGF, dest, src, T, IsTake, isOutlined);
       } else {
         callOutlinedCopy(IGF, dest, src, T, IsInitialization, IsTake);
diff --git a/test/IRGen/copy_addr_lowering.sil b/test/IRGen/copy_addr_lowering.sil
deleted file mode 100644
index 63d3a4771df66..0000000000000
--- a/test/IRGen/copy_addr_lowering.sil
+++ /dev/null
@@ -1,24 +0,0 @@
-// RUN: %target-swift-frontend -module-name A -Xllvm -sil-disable-pass=LowerAggregateInstr -emit-ir %s | %FileCheck %s
-sil_stage lowered
-
-import Builtin
-import Swift
-import SwiftShims
-
-struct S {
-    var s: ArraySlice<UInt8>
-    var i: ArraySlice<UInt8>.Index
-}
-
-
-// CHECK: define{{.*}} swiftcc void @copy_test(
-// CHECK-NOT:  call ptr @"$s1A1SVSgWOb"(
-// CHECK: memcpy
-// CHECK:  ret void
-
-sil @copy_test : $@convention(thin) (@in Optional<S>) -> @out Optional<S> {
-bb0(%0 : $*Optional<S>, %1 : $*Optional<S>):
-  copy_addr [take] %1 to [init] %0 : $*Optional<S>
-  %5 = tuple ()
-  return %5 : $()
-}