[llvm] [NVPTX] Enhance `mul.wide` and `mad.wide` peepholes (PR #150477)

[Justin Fargnoli via llvm-commits]

justinfargnoli wrote:

Hi @akuegel, thank you for reporting this and supplying the PTX diff! I took a look at the PTX diff, and it looks like what we'd expect from this PR. Perhaps there's a peephole/heuristic in `ptxas` that's no longer being triggered? 

Could you supply the CLI arguments you're passing to `ptxas` or the SASS for the before and after PTX? 

https://github.com/llvm/llvm-project/pull/150477