[PATCH] D89502: AMDGPU: Don't kill super-register with overlapping copy

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec accepted this revision.
rampitec added a comment.
This revision is now accepted and ready to land.

LGTM, although it might require checking liveness of all aliasing registers.



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Comment at: llvm/lib/Target/AMDGPU/SIInstrInfo.cpp:924
+  // instruction, since it will also kill the components made live by this def.
+  const bool CanKillSuperReg = KillSrc && !RI.regsOverlap(SrcReg, DestReg);
+
----------------
It could be some other unrelated superreg?


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  https://reviews.llvm.org/D89502/new/

https://reviews.llvm.org/D89502