[PATCH] D151916: [DAG] Peek through trunc when combining select into shifts.

[Nikita Popov via Phabricator via llvm-commits]

nikic added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:2500
+                            Op.getScalarValueSizeInBits());
+        if (TruncatedBits.isSubsetOf(Known.Zero))
+          Sel = Op;
----------------
`if (Known.countMaxActiveBits() < Sel.getScalarValueSizeInBits())` or so?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151916/new/

https://reviews.llvm.org/D151916