[PATCH] D149223: [PowerPC] Look through OR, AND, XOR instructions when checking a clear.

[Amy Kwan via Phabricator via llvm-commits]

amyk added inline comments.


================
Comment at: llvm/lib/Target/PowerPC/PPCMIPeephole.cpp:224
+    return std::max(
+        getKnownLeadingZeroCount(MI->getOperand(1).getReg(), TII, MRI),
+        getKnownLeadingZeroCount(MI->getOperand(1).getReg(), TII, MRI));
----------------
Is it possible to pull out `MI->getOperand(1).getReg()` to be used in both cases?


================
Comment at: llvm/lib/Target/PowerPC/PPCMIPeephole.cpp:227
+
+  if (Opcode == PPC::OR || Opcode == PPC::XOR8 || Opcode == PPC::XOR ||
+      Opcode == PPC::XOR8)
----------------
Do we need `PPC::OR8`, too?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D149223/new/

https://reviews.llvm.org/D149223