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[DebugInstrRef][2/9] Parse debug instruction-references from/to MIR

Authored by jmorse on Aug 11 2020, 9:12 AM.



This patch defines a MIR format for debug instruction references: it's an integer trailing an instruction, marked out by "debug-instr-number", much like how "debug-location" identifies the DebugLoc metadata of an instruction. I'm not wed to this name, or particularly to this syntax, but something is needed.

I've added a round-trip test and two verifier checks: that we don't label meta-instructions as generating values, and that there are no duplicates.

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jmorse created this revision.Aug 11 2020, 9:12 AM
Herald added a project: Restricted Project. · View Herald TranscriptAug 11 2020, 9:12 AM
aprantl accepted this revision.Aug 19 2020, 8:38 AM
This revision is now accepted and ready to land.Aug 19 2020, 8:38 AM
This revision was landed with ongoing or failed builds.Oct 14 2020, 2:58 AM
This revision was automatically updated to reflect the committed changes.