[llvm] [TableGen] Extend direct lookup to instruction values in generic tables. (PR #80486)

[Jason Eckhardt via llvm-commits]

nvjle wrote:

> > > CC @nvjle (not sure if notifications are sent without explicit mention)
> > 
> > 
> > Thanks @piotrAMD, I'll look into this in detail sometime this week. At first glance it does seem there may be a potential problem, but there is no actual failure that I can see. All testing is good thus far, including for AMDGPU. But we surely want this to be bullet proof.
> 
> Thanks, I'll try to come up with a reproducer.

Hi @piotrAMD, I've revisited this and agree with your reasoning and posted this tiny patch accordingly: https://github.com/llvm/llvm-project/pull/83284. All tests (including the backend I'm working on which is at least as SearchableTable-heavy as AMDGPU) are good and `WMMAOpcode2AddrMappingTable` isn't actually affected one way or the other. 


https://github.com/llvm/llvm-project/pull/80486