We previously allocated feedback vectors when instantiating the module,
or when lazily compiling a function. That's not sufficient when there
are multiple instances of the same NativeModule, or when we eagerly
tier-down all code for debugging. This patch changes the "get vector from
instance" sequence at the beginning of every Liftoff function to "get
or allocate vector"; factored into a builtin call to avoid generating
more code for every function.
Bug: v8:12852
Change-Id: I12ab96dc9575f5dff089147af1bf9b280616892d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3939667
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83610}
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