[PATCH] D54367: RegAllocFast: Improve hinting heuristic

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: lib/CodeGen/RegAllocFast.cpp:602-603
+static bool isCoalescable(const MachineInstr &MI) {
+  return MI.isCopy() && MI.getOperand(0).getSubReg() == 0 &&
+         MI.getOperand(1).getSubReg() == 0;
+}
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Isn't this the same as MI.isFullCopy()?


Repository:
  rL LLVM

https://reviews.llvm.org/D54367