[llvm] [AArch64] Avoid applying S-form on frame index in peephole (PR #158597)

[Hongyu Chen via llvm-commits]

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@@ -0,0 +1,96 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
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XChy wrote:

Sure, I will reduce its MIR form.

https://github.com/llvm/llvm-project/pull/158597