[PATCH] D53496: AMDGPU: Rewrite SILowerI1Copies to always stay on SALU

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec added inline comments.


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Comment at: lib/Target/AMDGPU/SILowerI1Copies.cpp:695
+    MI = MRI->getUniqueVRegDef(Reg);
+    if (MI->getOpcode() != AMDGPU::COPY)
+      break;
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nhaehnle wrote:
> rampitec wrote:
> > MI can be null technically.
> How? This pass runs on Machine SSA form.
As far as I understand you may have two defs in case of a superreg.


Repository:
  rL LLVM

https://reviews.llvm.org/D53496