[llvm] [LoopVectorize] Fix crash in VPWidenRecipe (PR #177357)

[Florian Hahn via llvm-commits]

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@@ -2273,9 +2273,11 @@ void VPWidenRecipe::execute(VPTransformState &State) {
   }
   case Instruction::ExtractValue: {
     assert(getNumOperands() == 2 && "expected single level extractvalue");
-    Value *Op = State.get(getOperand(0));
+    Value *Op = State.get(getOperand(0), /*NeedsScalar=*/true);
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fhahn wrote:

This looks a bit confusing, would be good to have a comment to clarify why that is needed

https://github.com/llvm/llvm-project/pull/177357