[PATCH] D141075: [SelectionDAG] Implicitly truncate known bits in SPLAT_VECTOR

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:2984
+    // SPLAT_VECTOR.
+    Known = computeKnownBits(SrcOp, Depth + 1).extractBits(BitWidth, 0);
     break;
----------------
Why `extractBits` instead of `trunc`?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D141075/new/

https://reviews.llvm.org/D141075