[PATCH] D122607: AMDGPU: Delete spills of undef values

[Scott Linder via Phabricator via llvm-commits]

scott.linder added inline comments.


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Comment at: llvm/test/CodeGen/AMDGPU/sgpr-spill-partially-undef.mir:69
+    ; CHECK-LABEL: name: sgpr_spill_s32_undef
+    ; CHECK: liveins: $vgpr0
+    ; CHECK-NEXT: {{  $}}
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Is there any downside to the VGPR remaining livein, even if no spill to it survives? I can't tell if the VGPR remains reserved in this case, but if not could the liveness end up incorrect?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D122607/new/

https://reviews.llvm.org/D122607