[llvm] [AArch64] Update tests for stack-probing (PR #102181)

[Matthew Levy via llvm-commits]

matthewlevy97 wrote:

I do not currently have a follow-up diff for changing how the test is auto-generated. I found that the compiler can output the generated code for stack probing in different orders leading to this test failing, yet producing effectively the same generated code.

I added the INVALID_TO_BREAK_UP_CHECK_DAG to ensure the order of the registers are intact as just CHECK-DAG can allow full reordering and cause the test to not verify register dependencies for code gen. The INVALID_TO_BREAK_UP_CHECK_DAG is just a CHECK-NOT that should never match anything to prevent all the CHECK-DAGs from being connected. If there is a better way to represent this so that it is correctly auto-generated I will happily change it.

https://github.com/llvm/llvm-project/pull/102181