[clang] [HLSL] Implement array temporary support (PR #79382)

[Chris B via cfe-commits]

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@@ -10524,6 +10524,11 @@ Sema::PerformCopyInitialization(const InitializedEntity &Entity,
   Expr *InitE = Init.get();
   assert(InitE && "No initialization expression?");
 
+  if (LangOpts.HLSL)
+    if (auto AdjTy = dyn_cast<DecayedType>(Entity.getType()))
+      if (AdjTy->getOriginalType()->isConstantArrayType())
+        InitE = HLSLArrayTemporaryExpr::Create(getASTContext(), InitE);
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llvm-beanz wrote:

Ooo. I like this idea a lot. Let me go give that a try. I was trying to avoid completely breaking array decay completely because at some point we’re going to align the language more with C/C++.

https://github.com/llvm/llvm-project/pull/79382