Bug 170817 – Air::RegLiveness should be constraint-based

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Filip Pizlo]

Patch forthcoming.

[Filip Pizlo]

Created attachment 307008 [details]
the patch

[Build Bot]

Attachment 307008 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/b3/air/AirRegLiveness.h:105:  The parameter name "liveness" adds no information, so it should be removed.  [readability/parameter_name] [5]
ERROR: Source/JavaScriptCore/b3/air/AirRegLiveness.h:105:  The parameter name "block" adds no information, so it should be removed.  [readability/parameter_name] [5]
Total errors found: 2 in 5 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Saam Barati]

Comment on attachment 307008 [details]
the patch

View in context: https://bugs.webkit.org/attachment.cgi?id=307008&action=review

r=me

> Source/JavaScriptCore/b3/air/AirAllocateRegistersAndStackByLinearScan.cpp:226
> +                // FIXME: We can get this information from the liveness constraints. Except of
> +                // course we want to separate the earlies of one instruction from the lates of
> +                // the next.

Please make a bug and link here.

> Source/JavaScriptCore/b3/air/AirAllocateRegistersAndStackByLinearScan.cpp:241
> +                // FIXME: This could reg the register sets from somewhere else, like the
> +                // liveness constraints. Except we want those constraints to be laid out like
> +                // how they would have been by RegLiveness, since we want to separate the lates
> +                // of one inst from the earlies of the next.

reg => get

Also, please make a bug and link it here.

[Filip Pizlo]

(In reply to Saam Barati from comment #3)
> Comment on attachment 307008 [details]
> the patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=307008&action=review
> 
> r=me
> 
> > Source/JavaScriptCore/b3/air/AirAllocateRegistersAndStackByLinearScan.cpp:226
> > +                // FIXME: We can get this information from the liveness constraints. Except of
> > +                // course we want to separate the earlies of one instruction from the lates of
> > +                // the next.
> 
> Please make a bug and link here.
> 
> > Source/JavaScriptCore/b3/air/AirAllocateRegistersAndStackByLinearScan.cpp:241
> > +                // FIXME: This could reg the register sets from somewhere else, like the
> > +                // liveness constraints. Except we want those constraints to be laid out like
> > +                // how they would have been by RegLiveness, since we want to separate the lates
> > +                // of one inst from the earlies of the next.
> 
> reg => get
> 
> Also, please make a bug and link it here.

Filed https://bugs.webkit.org/show_bug.cgi?id=170850 for both of those and fixed the typo.

[Filip Pizlo]

Landed in https://trac.webkit.org/changeset/215365/webkit