[clang] [DXIL] Don't generate per-variable guards for DirectX (PR #106096)

[Greg Roth via cfe-commits]

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@@ -94,6 +94,13 @@ class LLVM_LIBRARY_VISIBILITY DirectXTargetInfo : public TargetInfo {
   BuiltinVaListKind getBuiltinVaListKind() const override {
     return TargetInfo::VoidPtrBuiltinVaList;
   }
+
+  void adjust(DiagnosticsEngine &Diags, LangOptions &Opts) override {
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pow2clk wrote:

I'm glad you asked! That's a bug I forgot to file. I think SPIR-V should exclude these as well. However, it uses the Itanium ABI which generates completely different protections. It was a non-trivial amount of additional work that wouldn't share anything with what I did here and this was meant to be an incidental to make testing easier, so I left it out. 

https://github.com/llvm/llvm-project/pull/106096