[llvm] [RISCV] Combine (or disjoint ext, ext) -> vwadd (PR #86929)

[Yingwei Zheng via llvm-commits]

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@@ -13675,6 +13675,7 @@ struct NodeExtensionHelper {
     case RISCVISD::ADD_VL:
     case RISCVISD::VWADD_W_VL:
     case RISCVISD::VWADDU_W_VL:
+    case ISD::OR:
       return RISCVISD::VWADD_VL;
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dtcxzyw wrote:

Can you add a test for `vwadd`?


https://github.com/llvm/llvm-project/pull/86929