[PATCH] D128911: Emit table lookup from TargetLowering::expandCTTZ()

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp:7972
+  for (unsigned i = 0; i < BitWidth; i++) {
+    APInt Lshr = DeBruijn.rotl(i);
+    APInt Rshr = Lshr.lshr(ShiftAmt);
----------------
What does `Lshr` mean? `shr` is usually "shift right", and lshr is logical shift right. But here `L` means left? But that means I don't know what `shr` means.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D128911/new/

https://reviews.llvm.org/D128911