[clang] [llvm] [HLSL] Implement '__builtin_hlsl_is_intangible' type trait (PR #104544)

[Greg Roth via cfe-commits]

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@@ -5695,6 +5696,15 @@ static bool EvaluateUnaryTypeTrait(Sema &Self, TypeTrait UTT,
         return true;
     return false;
   }
+  case UTT_IsIntangibleType:
+    assert(Self.getLangOpts().HLSL && "intangible types are HLSL-only feature");
+    if (!T->isVoidType() && !T->isIncompleteArrayType())
+      if (Self.RequireCompleteType(TInfo->getTypeLoc().getBeginLoc(), T,
+                                   diag::err_incomplete_type))
+        return false;
+    DiagnoseVLAInCXXTypeTrait(Self, TInfo,
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pow3clk wrote:

If this identifies a VLA and returns true, should we not return false? 

https://github.com/llvm/llvm-project/pull/104544