[llvm] Adjust bit cast instruction filter for DXIL Prepare pass (PR #142678)

[Joshua Batista via llvm-commits]

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@@ -148,9 +148,47 @@ class DXILPrepareModule : public ModulePass {
                                      Type *Ty) {
     // Omit bitcasts if the incoming value matches the instruction type.
     auto It = PointerTypes.find(Operand);
-    if (It != PointerTypes.end())
-      if (cast<TypedPointerType>(It->second)->getElementType() == Ty)
+    if (It != PointerTypes.end()) {
+      auto OpTy = cast<TypedPointerType>(It->second)->getElementType();
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bob80905 wrote:

It compiles and runs well both ways, auto figures it out. Though I do typically see a * after auto assignments, it may be a style thing.
I'll change it.

https://github.com/llvm/llvm-project/pull/142678