1665612 - Add delazified flag to ScriptStencil

Status: RESOLVED FIXED

(Core :: JavaScript Engine, task, P1)

Description

[Tooru Fujisawa [:arai]]

in bug 1665387, we'll merge CompilationStencil for delazification into top-level CompilationStencil.
If we do that, the function is represented as "eagerly compiled from the beginning",
and the function isn't relazified, because AllowRelazify flag isn't set.

we need a flag in ScriptStencil, that's set when merging delazification stencil,
and if the flag is set, we should set AllowRelazify flag when instantiation.

Comment 1

[Tooru Fujisawa [:arai]]

Attachment: Bug 1665612 - Add ScriptStencil.allowDelazify field to record MutableScriptFlagsEnum::AllowDelazify in stencil XDR. r?tcampbell!

Comment 2

[Tooru Fujisawa [:arai]]

actually, we should store runtime MutableScriptFlagsEnum::AllowDelazify into stencil.
https://searchfox.org/mozilla-central/rev/d410917833190ee08a62b38f8f9de65cea1e661b/js/src/vm/JSScript.cpp#1018-1019

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/755b9a0117fc
Add ScriptStencil.allowDelazify field to record MutableScriptFlagsEnum::AllowDelazify in stencil XDR. r=tcampbell

Comment 4

[Andreea Pavel [:apavel]]

https://hg.mozilla.org/mozilla-central/rev/755b9a0117fc

Comment 5

[Alexandru Ionescu (needinfo me) [:alexandrui]]

deleted