[llvm-branch-commits] [llvm] release/21.x: [Mips] Support "$sp" named register (#136821) (PR #171308)

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dyung wrote:

Sorry, but I do not think this is a good candidate for the final release of the 21.x branch due to it being a fix for a long standing issue which will be available starting in 22.x which will branch in a month. Additionally I note from the original review that this change caused some test failures and you had to revert the change.

https://github.com/llvm/llvm-project/pull/171308