[PATCH] D145211: Relax cross-section branches

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/lib/Target/AArch64/AArch64InstrInfo.cpp:271-273
+  // Get a scratch register. It's important to get a virtual register because
+  // the register scavenger doesn't work with empty blocks.
+  Register ScratchReg = MRI.createVirtualRegister(&AArch64::GPR64RegClass);
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I think it would be better to just fix the scavenger to tolerate empty blocks. 


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D145211/new/

https://reviews.llvm.org/D145211