843325 - BaselineCompiler: Add optimized stub to handle EVAL

Status: RESOLVED INCOMPLETE

(Core :: JavaScript Engine, defect)

Description

[Kannan Vijayan [:djvj]]

This hits 5000 times in date-format-tofte, where we enter the VM and re-enter baseline.  Fallback stub needs to look up the JSScript in the eval cache and add a guarded stub to jump directly to the script based on matching string.

Comment 1

[Mayank Bansal]

eval is actively discouraged these days.
Iain, I'm closing this bug but please feel free to reopen.

Comment 2

[Iain Ireland [:iain]]

This particular optimization is targeted at a single microbenchmark that's been copied from Sunspider to Octane and then Jetstream. I'm not aware of it ever kicking in on the web, so we decided not to reimplement it in Ion during the IonBuilder->WarpBuilder transition. It's likely that this microbenchmark will finally be removed in an upcoming version of JetStream.