[llvm] [DirectX] Scalarize `extractelement` and `insertelement` with dynamic indices (PR #141676)

[Deric C. via llvm-commits]

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@@ -79,6 +79,16 @@ class DataScalarizerVisitor : public InstVisitor<DataScalarizerVisitor, bool> {
   friend bool findAndReplaceVectors(llvm::Module &M);
 
 private:
+  typedef std::pair<AllocaInst *, SmallVector<Value *, 4>> AllocaAndGEPs;
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Icohedron wrote:

By the time HLSL has vectors larger than 4 is also when DXIL has native support for dynamic vector indexing, thus this transformation would not be used.

https://github.com/llvm/llvm-project/pull/141676