[llvm] [CodeGen] Allow larger number of operands to be compiled by SelectionDAG (PR #122737)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

> > What effect does this have on the class sizes? MCInstrDesc etc. look like you're going to end up with a lot more padding?
> 
> do you have a test case to play with ?

Why not just temporarily add static_assert(sizeof()) checks to keep track of the class sizes?

https://github.com/llvm/llvm-project/pull/122737