[llvm] [AVR] Fix for issue #163015, occasional corruption in stack passed params (PR #164001)

[Ben Shi via llvm-commits]

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benshi001 wrote:

I think it is not needed to run `update_llc_test_checks.py`, since the key check point in this test are the `CHECK-NOT` lines.

https://github.com/llvm/llvm-project/pull/164001