[llvm] [LV] Add initial support for vectorizing literal struct return values (PR #109833)

[Florian Hahn via llvm-commits]

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@@ -1277,6 +1277,13 @@ void VPWidenRecipe::execute(VPTransformState &State) {
     State.addMetadata(V, dyn_cast_or_null<Instruction>(getUnderlyingValue()));
     break;
   }
+  case Instruction::ExtractValue: {
+    Value *Op = State.get(getOperand(0));
+    Value *Extract = Builder.CreateExtractValue(
+        Op, cast<ExtractValueInst>(getUnderlyingValue())->getIndices());
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fhahn wrote:

Depends on how the recipe is constructed (would be helpful to have a test that prints a VPlan with the recipes to see the operands). But as the indices are not Value * operands of the instruction, they might need to be added as operands manually. (also would be good to make sure there are tests with multiple indices?)

https://github.com/llvm/llvm-project/pull/109833