Index: llvm/lib/Target/AArch64/AArch64RegisterInfo.cpp
===================================================================
--- llvm/lib/Target/AArch64/AArch64RegisterInfo.cpp
+++ llvm/lib/Target/AArch64/AArch64RegisterInfo.cpp
@@ -39,6 +39,11 @@
 #define GET_REGINFO_TARGET_DESC
 #include "AArch64GenRegisterInfo.inc"
 
+static cl::opt<bool>
+    FrameRecordOnTop("aarch64-frame-record-on-top",
+                     cl::desc("place the frame record on top of the frame"),
+                     cl::init(false), cl::Hidden);
+
 AArch64RegisterInfo::AArch64RegisterInfo(const Triple &TT)
     : AArch64GenRegisterInfo(AArch64::LR), TT(TT) {
   AArch64_MC::initLLVMToCVRegMapping(this);
@@ -120,6 +125,8 @@
     return CSR_AArch64_AAPCS_X18_SaveList;
   if (MF->getInfo<AArch64FunctionInfo>()->isSVECC())
     return CSR_AArch64_SVE_AAPCS_SaveList;
+  if (FrameRecordOnTop)
+    return CSR_Darwin_AArch64_AAPCS_SaveList;
   return CSR_AArch64_AAPCS_SaveList;
 }