fixup! [AIEX] Support 'return_in_regs' attribute for any AIE version

clang/test/CodeGen/aie/aie-return-in-regs.cpp

@@ -1,4 +1,3 @@
-// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --function-signature --return-type --skip-function-body
 //===- aie-return-in-regs.cpp -----------------------------------*- C++ -*-===//
 //
 // This file is licensed under the Apache License v2.0 with LLVM Exceptions.
@@ -26,7 +25,7 @@ struct largeStruct_InRegs {
 } __attribute__((return_in_regs));
 
 // CHECK-LABEL: define {{[^@]*}}void @ret_in_stack
-// CHECK-SAME: (ptr noalias sret([[STRUCT_LARGESTRUCT_INSTACK:%.*]]) align 16 [[AGG_RESULT:%.*]]) #[[ATTR0:[0-9]+]] {
+// CHECK-SAME: (ptr dead_on_unwind noalias writable sret([[STRUCT_LARGESTRUCT_INSTACK:%.*]]) align 16 [[AGG_RESULT:%.*]]) #[[ATTR0:[0-9]+]] {
 largeStruct_InStack ret_in_stack(void) { return {}; }
 
 // CHECK-LABEL: define {{[^@]*}}%struct.largeStruct_InRegs @ret_in_regs