[llvm] CodeGen: Fix double counting bundles in inst size verification (PR #191460)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> https://github.com/llvm/llvm-project/blob/d5a8af542ee8afb16e7ac42277953e74e59f9bd7/llvm/lib/Target/Mips/MipsBranchExpansion.cpp#L300-L302
> 
> would end up double-counting the size of bundles, right?

Assuming the mips implementation correctly handled bundles, it wouldn't double count. the instrs() iterator should visit the BUNDLE header, followed by the next unbundled instruction 


https://github.com/llvm/llvm-project/pull/191460