1850814 - Add post barrier fast path for last-buffered-cell also to Baseline and IC code

Status: RESOLVED FIXED

(Core :: JavaScript Engine: JIT, task)

Description

[Jan de Mooij [:jandem]]

Bug 1814928 added a fast path to the Ion post barrier code to check the one-element cache before calling into C++. We can add the same check to the Baseline and IC code.

This lets us skip the call in BaselineCodeGen in ~70% of cases on Speedometer 3. For IC code this is ~22%.

Comment 1

[Jan de Mooij [:jandem]]

Attachment: Bug 1850814 - Add post barrier fast path for last-buffered-cell also to Baseline and IC code. r?jonco!

This lets us skip the call in BaselineCodeGen in ~70% of cases on Speedometer 3.
For IC code this is ~22%.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/b3b64c6b12cd
Add post barrier fast path for last-buffered-cell also to Baseline and IC code. r=jonco

Comment 3

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/b3b64c6b12cd