[PATCH] D73214: [MIPS GlobalISel] Select count leading zeros

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp:3872
+    auto UnmergeSrc = B.buildUnmerge(NarrowTy, MI.getOperand(1));
+
+    auto C_0 = B.buildConstant(NarrowTy, 0);
----------------
Can you add a comment like the DAG has for what this is doing like
  // ctlz (HiLo) -> Hi != 0 ? ctlz(Hi) : (ctlz(Lo)+32)



CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D73214/new/

https://reviews.llvm.org/D73214