When pointer compression is disabled, and sizeof(Tagged_t) is 8 (eg,
arm64 without pointer compression), the function
extract_first_nonzero_index is never used, which was causing a warning.


Bug: v8:13048
Change-Id: I5a0fba4da4201e3be147632d891d0d9e20cb46eb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3769694Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81812}