[llvm] [NVPTX] legalize v2i32 to improve compatibility with v2f32 (PR #153478)

[Artem Belevich via llvm-commits]

Artem-B wrote:

It appears that the patch may have introduced a bug: https://godbolt.org/z/EPPhGEGxT

Looks like we also need to expand `trunc` operation, too.


https://github.com/llvm/llvm-project/pull/153478