[PATCH] D146734: [CodeGen] Use RegUnits in RegisterClassInfo::getLastCalleeSavedAlias

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/include/llvm/CodeGen/RegisterClassInfo.h:60
+  // Map regunit to the callee saved Register.
   SmallVector<MCPhysReg, 4> CalleeSavedAliases;
 
----------------
SmallVector<4> seems like a weird way to map this. I'd expect all sets of registers to be BitVectors?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D146734/new/

https://reviews.llvm.org/D146734