[PATCH] D140347: SelectionDAG: Teach ComputeKnownBits about VSCALE

[Nikita Popov via Phabricator via llvm-commits]

nikic added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:3121
+
+    break;
+  }
----------------
Can this whole block be reduced to something like this?
```
const Function &F = getMachineFunction().getFunction();
const APInt &Multiplier = Op.getConstantOperandAPInt(0);
Known = getVScaleConstantRange(&F, BitWidth).mul(Multiplier).toKnownBits();
```


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D140347/new/

https://reviews.llvm.org/D140347