We can call FeedbackTypeOf before the switch statement to avoid
generating callsites for every operation. This CL saves 4 KiB binary
size.

Bug: v8:8238
Change-Id: I0f9d7a155e0cec219306ca1fb35f1eb9ff18a36f
Reviewed-on: https://chromium-review.googlesource.com/1254207
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56340}