1617564 - Land primitive WarpBuilder prototype

Status: RESOLVED FIXED

(Core :: JavaScript Engine: JIT, task)

Description

[Jan de Mooij [:jandem]]

Goal is to be able to compile a return 0; function (including off-thread MIR building), behind a --warp shell flag. That will give us something concrete to improve.

Comment 1

[Jan de Mooij [:jandem]]

Attachment: Bug 1617564 part 1 - Add a --warp shell flag. r?iain!

Comment 2

[Jan de Mooij [:jandem]]

Attachment: Bug 1617564 part 2 - Add minimal WarpBuilder prototype. r?iain!

This has just enough code to be able to compile a "return 0;" function,
including off-thread MIR building.

The new builder consists of two parts:

• WarpOracle: runs on the main thread, produces a WarpSnapshot.
• WarpBuilder: can run off-thread, uses the WarpSnapshot to generate MIR.

WarpOracle will make a lot of the optimization decisions (which scripts can be
compiled, which ICs are copied, which functions we want to inline). WarpBuilder
will do 'just' MIR building.

This is an early prototype; the code is expected to change significantly the
coming weeks/months.

Depends on D64012

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/3dbf9f9d69b4
part 1 - Add a --warp shell flag. r=iain
https://hg.mozilla.org/integration/autoland/rev/a2d34756f1f7
part 2 - Add minimal WarpBuilder prototype. r=iain

Comment 4

[Andrei Ciure[:aciure]]

https://hg.mozilla.org/mozilla-central/rev/3dbf9f9d69b4
https://hg.mozilla.org/mozilla-central/rev/a2d34756f1f7