[llvm] [NVPTX] Merge consecutive elements while buffering constant vectors with sub-byte datatype. (PR #183628)

[Artem Belevich via llvm-commits]

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Artem-B wrote:

The last remaining nit is that we now have two distinct ways we do "for" loops over integer sequences. What I meant by "consistency" is that we should pick one. Up to you which one, C-style, or range-based iteration over seq.

https://github.com/llvm/llvm-project/pull/183628