Jay Foad a6dabed348 [AMDGPU] Fix nondeterminism in SIFixSGPRCopies (#70644) ...

There are a couple of loops that iterate over V2SCopies. The iteration
order needs to be deterministic, otherwise we can call moveToVALU in
different orders, which causes temporary vregs to be allocated in
different orders, which can affect register allocation heuristics.

2023-10-31 11:47:42 +00:00

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