[clang] [llvm] [HLSL][SPIR-V] Implement vk::ext_builtin_input attribute (PR #138530)

[Nathan Gauër via llvm-commits]

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@@ -554,6 +554,19 @@ static void initializeBufferFromBinding(CodeGenModule &CGM,
                    Args);
 }
 
+void CGHLSLRuntime::handleGlobalVarDefinition(const VarDecl *VD,
+                                              llvm::GlobalVariable *GV) {
+  if (auto Attr = VD->getAttr<HLSLVkExtBuiltinInputAttr>()) {
+    LLVMContext &Ctx = GV->getContext();
+    IRBuilder<> B(GV->getContext());
+    MDNode *Operands = MDNode::get(
+        Ctx, {ConstantAsMetadata::get(B.getInt32(11)),
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Keenuts wrote:

Will do (11 is the `Spirv::Decoration::Builtin` operand)

https://github.com/llvm/llvm-project/pull/138530