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[Statepoints] Properly handle const base pointer.

Authored by dantrushin on Sep 7 2020, 11:23 AM.



Current code in InstEmitter assumes all GC pointers are either
VRegs or stack slots - hence, taking only one operand.
But it is possible to have constant base, in which case it
occupies two machine operands.

Add a convinience function to StackMaps to get index of next
meta argument and use it in InsrEmitter to properly advance to
the next statepoint meta operand.

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Event Timeline

dantrushin created this revision.Sep 7 2020, 11:23 AM
Herald added a project: Restricted Project. · View Herald TranscriptSep 7 2020, 11:23 AM
dantrushin requested review of this revision.Sep 7 2020, 11:23 AM
reames accepted this revision.Sep 8 2020, 2:04 PM

LGTM. Good catch, and nicely structured cleanup in the process.

This revision is now accepted and ready to land.Sep 8 2020, 2:04 PM
This revision was landed with ongoing or failed builds.Sep 9 2020, 12:08 AM
This revision was automatically updated to reflect the committed changes.