... in both CSA code and TurboFan. This is a prerequisite for smi-corrupting
decompression.

The decompression eliminator changes is a workaround to ensure that the result
of comparisons of two constant Smis is still a constexpr (the failing test is
cctest/test-torque/TestLoadEliminationFixed). Better optimizations will be
landed in a follow-up CLs.

Bug: v8:9706
Change-Id: Ie2d90f6a7714aa749439e3f457d90d663d0efe49
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1815133Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63991}