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GlobalISel: Fix narrowScalar for G_{CTLZ|CTTZ}_ZERO_UNDEF
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Authored by arsenm on Feb 7 2020, 10:09 AM.

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Summary

Narrow these for 64-bit VALU for AMDGPU.

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Event Timeline

arsenm created this revision.Feb 7 2020, 10:09 AM
Herald added a project: Restricted Project. · View Herald TranscriptFeb 7 2020, 10:09 AM
Petar.Avramovic accepted this revision.Feb 7 2020, 10:41 AM

LGTM

llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
3998–4000

could use

auto LoCTLZ = B.buildInstr(MI.getOpcode(), {DstTy}, {UnmergeSrc.getReg(0)});

for breviary.

This revision is now accepted and ready to land.Feb 7 2020, 10:41 AM