... and the following helper methods:
- IntPtrOrSmiConstant
- IntPtrOrSmiXXX
- Increment
- Decrement

Bug: v8:9708
Change-Id: I9da8bba4da2012a873fd3f23972c678ff80eec21
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798623Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63689}