LiveIntervals: Split live intervals on multiple dead defs
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Authored by arsenm on Sep 11 2019, 7:39 AM.

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Reviewers

qcolombet
MatzeB

Summary

If there are multiple dead defs of the same virtual register, these
are required to be split into multiple virtual registers with separate
live intervals to avoid a verifier error.

Diff Detail

Event Timeline

arsenm created this revision.Sep 11 2019, 7:39 AM

Herald added subscribers: nhaehnle, wdng, jvesely. · View Herald TranscriptSep 11 2019, 7:39 AM

LGTM

This revision is now accepted and ready to land.Sep 11 2019, 9:24 AM

r371640

kparzysz mentioned this in D68666: LiveIntervals: Split live intervals on multiple dead defs.Oct 8 2019, 2:23 PM

kparzysz mentioned this in rG43144ffa91a2: LiveIntervals: Split live intervals on multiple dead defs.Oct 30 2019, 6:51 AM

foad mentioned this in D151227: RFC: LiveIntervalCalc: Always split separate components.May 23 2023, 9:24 AM

Revision Contents
Changeset List

Path

Size

lib/

CodeGen/

LiveIntervals.cpp

12 lines

test/

CodeGen/

AMDGPU/

live-intervals-multiple-dead-defs.mir

18 lines

Diff 219716

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lib/CodeGen/LiveIntervals.cpp

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test/CodeGen/AMDGPU/live-intervals-multiple-dead-defs.mir

Please use GitHub pull requests for new patches. Avoid migrating existing patches. Phabricator shutdown timeline

LiveIntervals: Split live intervals on multiple dead defsClosedPublicActions