I noticed that, with pointer-compression enabled, in map checks we no
longer load the map as part of the cmp instruction:

movl rcx,[rdx-0x1]
movl rdi,0x8286f8d  ;; (compressed) object: <Map(HOLEY_ELEMENTS)>
cmpl rdi,rcx

This CL restores that:

movl rcx,0x82c6f8d  ;; (compressed) object: <Map(HOLEY_ELEMENTS)>
cmpl [rdx-0x1],rcx

Change-Id: Ifcc7f34fddf6aa423c0a26066ac124e9757cb9ab
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2320653Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69130}