[clang] [llvm] [DirectX] Add target builtins (PR #134439)

[Farzon Lotfi via llvm-commits]

================
@@ -0,0 +1,23 @@
+//===- SemaDirectX.cpp - Semantic Analysis for DirectX constructs----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// This implements Semantic Analysis for DirectX constructs.
+//===----------------------------------------------------------------------===//
+
+#include "clang/Sema/SemaDirectX.h"
+#include "clang/Basic/TargetBuiltins.h"
+#include "clang/Sema/Sema.h"
+
+namespace clang {
+
+SemaDirectX::SemaDirectX(Sema &S) : SemaBase(S) {}
+
+bool SemaDirectX::CheckDirectXBuiltinFunctionCall(unsigned BuiltinID,
+                                                  CallExpr *TheCall) {
+  return false;
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farzonl wrote:

The plan right now is that we do target builtins when one of our two targets has an opcode and the other does not. Im not aware of another case right now for directx. The problem i have with removing this when i don’t have another candidate in mind is it feel like we have incomplete support for target builtins if we strip out all the sema changes.

https://github.com/llvm/llvm-project/pull/134439