1483871 - Consider adding an optimized JIT entry for Function.prototype.call/apply

Status: NEW

(Core :: JavaScript Engine, enhancement, P3)

Description

[Jan de Mooij [:jandem]]

A bit like bug 1483869: I think we could add an "optimized JIT entry" (a feature added for Wasm natives) to the fun_call/fun_apply JSNatives.

This JIT entry point would just be a trampoline where we call the target function if it's scripted, or call into C++ if it's not. Once we have that, we can remove the Baseline ICs for call/apply and the similar Ion call optimizations.

Comment 1

[Ted Campbell [:tcampbell]]

If we go this route can we please wrap the pointers in a new data structure and make this a little more explicit? There is already enough hidden complexity with these "optimized JIT entries" having surprising coupling to the GC relocation mechanism.