[llvm] [NVPTX] Basic support for fp128 as a storage type (PR #136006)

[Kazu Hirata via llvm-commits]

kazutakahirata wrote:

@AlexMaclean @Artem-B I've landed 94aa4bfba57cd5df5489ceca5c1b4b59cfcc1288 to fix a warning from this PR.  Now that I see the discussion here, `[[maybe_unused]]` may be better.  Anyway, thanks!


https://github.com/llvm/llvm-project/pull/136006