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

[Benjamin Maxwell via llvm-commits]

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@@ -122,6 +122,8 @@ Type *VPTypeAnalysis::inferScalarTypeForRecipe(const VPWidenRecipe *R) {
   case Instruction::FNeg:
   case Instruction::Freeze:
     return inferScalarType(R->getOperand(0));
+  case Instruction::ExtractValue:
+    return R->getUnderlyingInstr()->getType();
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MacDue wrote:

I think this should return a struct of scalars (so a "narrow" type rather than a scalar). 

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