[PATCH] D125600: [SelectionDAGBuilder] Pass fast math flags to most of VP SDNodes.

[Yeting Kuo via Phabricator via llvm-commits]

fakepaper56 marked an inline comment as done.
fakepaper56 added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:7615
+    } else {
+      Result = DAG.getNode(Opcode, DL, VTs, OpValues);
+    }
----------------
craig.topper wrote:
> Why can't we do?
> 
> ```
>     SDValue Result;
>     SDNodeFlags SDFlags;
>     if (auto *FPMO = dyn_cast<FPMathOperator>(&VPIntrin))
>       SDFlags.copyFMF(*FPMO);
>     Result = DAG.getNode(Opcode, DL, VTs, OpValues, SDFlags);
> ```
getNode with SDVTList does not use SDNodeFlags directly.

```
SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, SDVTList VTList,
                              ArrayRef<SDValue> Ops, const SDNodeFlags Flags) {
  if (VTList.NumVTs == 1) 
    return getNode(Opcode, DL, VTList.VTs[0], Ops);
```


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D125600/new/

https://reviews.llvm.org/D125600