add --verify-machineinstrs option for cmpxchg-128 test

Author: tangaac

llvm/test/CodeGen/LoongArch/ir-instruction/atomic-cmpxchg-128.ll

@@ -1,7 +1,7 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc --mtriple=loongarch64 -mattr=+d,-scq,-ld-seq-sa < %s | FileCheck %s --check-prefix=LA64
-; RUN: llc --mtriple=loongarch64 -mattr=+d,+scq,-ld-seq-sa < %s | FileCheck %s --check-prefixes=LA64-SCQ,NO-LD-SEQ-SA
-; RUN: llc --mtriple=loongarch64 -mattr=+d,+scq,+ld-seq-sa < %s | FileCheck %s --check-prefixes=LA64-SCQ,LD-SEQ-SA
+; RUN: llc --mtriple=loongarch64 -mattr=+d,+scq,-ld-seq-sa --verify-machineinstrs < %s | FileCheck %s --check-prefixes=LA64-SCQ,NO-LD-SEQ-SA
+; RUN: llc --mtriple=loongarch64 -mattr=+d,+scq,+ld-seq-sa --verify-machineinstrs < %s | FileCheck %s --check-prefixes=LA64-SCQ,LD-SEQ-SA
 
 define void @cmpxchg_i128_acquire_acquire(ptr %ptr, i128 %cmp, i128 %val) nounwind {
 ; LA64-LABEL: cmpxchg_i128_acquire_acquire: