[PATCH] D78591: [AMDGPU] Define special SGPR subregs

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp:269-270
+    Register Low = getSubReg(Reg, AMDGPU::lo16);
+    if (!AMDGPU::SGPR_LO16RegClass.contains(Low))
+      Reserved.set(Low);
+  }
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Add a note that this is because there's no SReg_LO16 at least


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D78591/new/

https://reviews.llvm.org/D78591