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[clang] Ensure correct metadata for relative vtables

Authored by leonardchan on Sep 26 2022, 5:54 PM.



Prior to this, metadata pertaining to the size or address point offsets into a relative vtable were twice the value they should be (treating component widths as pointer width rather than 4 bytes). This prevented some vtables from being devirtualized with D134320. This ensures the correct metadata is written so whole program devirtualization can catch these remaining devirt targets.

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leonardchan created this revision.Sep 26 2022, 5:54 PM
Herald added a project: Restricted Project. · View Herald TranscriptSep 26 2022, 5:54 PM
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leonardchan requested review of this revision.Sep 26 2022, 5:54 PM
phosek added inline comments.Sep 27 2022, 2:49 PM

Could we use getVTableComponentType method here?

leonardchan marked an inline comment as done.
This revision is now accepted and ready to land.Sat, Nov 19, 3:21 PM
This revision was landed with ongoing or failed builds.Wed, Dec 7, 4:43 PM
This revision was automatically updated to reflect the committed changes.