[PATCH] D109482: [RISCV] Fold store of vmv.x.s to a vse with VL=1.

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


================
Comment at: llvm/lib/Target/RISCV/RISCVISelLowering.cpp:6596
+        SDLoc DL(N);
+        return DAG.getMemIntrinsicNode(
+            RISCVISD::VSE_VL, DL, DAG.getVTList(MVT::Other),
----------------
frasercrmck wrote:
> I was wondering what'd happen if you replaced it with a `ISD::VP_STORE`. Just thinking that a standard node would potentially provide more optimization opportunities compared to a RISCVISD node.
If I'm reading the code right, we don't recognize VP_STORE with an all ones mask as special and I think we'll end up lowering it to the vse_mask intrinsic.


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  https://reviews.llvm.org/D109482/new/

https://reviews.llvm.org/D109482