Functions that get hot quickly are more likely to stay hot and stable,
so optimize these functions earlier than the function that become
hot slower. To measure how "soon" the function gets hot this cl
introduces a global tick that is incremented whenever a function
registers a tick. We use the difference in the global tick between the
current tick and the last tick on that function to measure how soon
the function is becoming hot. We use the last tick to account for
functions that aren't used so much at the start but become hot
in a later phase. Currently we use this heuristic only for Turboprop
tierups. It is possible to extend this to extend this to Turbofan in
future.

Bug: v8:9684
Change-Id: I8ef265c03520274c68d56a9d35429531a3ba3d1d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2627850
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72281}