[PATCH] D103323: [DAGCombiner] Add support for mulhi const folding in DAGCombiner

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:5092
+    APInt C2Ext = C2.sextOrTrunc(FullWidth);
+    return (C1Ext * C2Ext).getHiBits(C1.getBitWidth()).trunc(C1.getBitWidth());
+  }
----------------
APInt::extractBits ?


================
Comment at: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:5098
+    APInt C2Ext = C2.zextOrTrunc(FullWidth);
+    return (C1Ext * C2Ext).getHiBits(C1.getBitWidth()).trunc(C1.getBitWidth());
+  }
----------------
APInt::extractBits ?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D103323/new/

https://reviews.llvm.org/D103323