[clang] [llvm] [HLSL][Clang] Start emitting @llvm.structured.alloca (PR #190157)

[Nathan Gauër via cfe-commits]

================
@@ -986,7 +989,11 @@ void CGHLSLRuntime::emitEntryFunction(const FunctionDecl *FD,
       if (!SemanticValue)
         return;
       if (Param.hasByValAttr()) {
-        llvm::Value *Var = B.CreateAlloca(Param.getParamByValType());
+        llvm::Value *Var =
+            CGM.getLangOpts().EmitLogicalPointer
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Keenuts wrote:

IRBuilder has no info about the codegen context. Doing this would require modifying the way we create it to pass either CGM or LangOpt, or something else.
Alternative is to add an optional bool "structured" in the CreateAlloca, but it's almost the same.

https://github.com/llvm/llvm-project/pull/190157