[PATCH] D92907: [RegisterClassInfo] Return non-zero for RC without allocatable reg

[Simon Pilgrim via Phabricator via llvm-commits]

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

LGTM with one minor



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Comment at: llvm/lib/CodeGen/RegisterClassInfo.cpp:193
+  unsigned RegPressureSetLimit = TRI->getRegPressureSetLimit(*MF, Idx);
+  if (NAllocatableRegs == 0)
+    return RegPressureSetLimit;
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Please can you add a comment explaining the early-out?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D92907/new/

https://reviews.llvm.org/D92907