[llvm] [TableGen] Increase IndexWidth DAGISelMatcherEmitter. (PR #159479)

[Craig Topper via llvm-commits]

topperc wrote:

> LGTM
> 
> As a suggestion, I think the value could be computed from the table size. So that we don't print redundant spaces.

Yeah. The calculation in your decoder patch reminded I had been meaning to update the number. The comments in DAG aren't enabled by default so you only see any of this if you add the cmake flag or run tblgen manually.

https://github.com/llvm/llvm-project/pull/159479