[Mlir-commits] [clang] [mlir] [CIR] Implement lowering for 'no-builtins' attributes (PR #178899)

[Bruno Cardoso Lopes]

================
@@ -111,6 +111,41 @@ static void addAttributesFromFunctionProtoType(CIRGenBuilderTy &builder,
               mlir::UnitAttr::get(builder.getContext()));
 }
 
+static void addNoBuiltinAttributes(mlir::MLIRContext &ctx,
+                                   mlir::NamedAttrList &attrs,
+                                   const LangOptions &langOpts,
+                                   const NoBuiltinAttr *nba = nullptr) {
+  // First, handle the language options passed through -fno-builtin.
+  // or, if there is a wildcard in the builtin names specified through the
+  // attribute, disable them all.
+  if (langOpts.NoBuiltin ||
+      (nba && llvm::is_contained(nba->builtinNames(), "*"))) {
+    // -fno-builtin disables them all.
+    // Empty attribute means 'all'.
+    attrs.set(cir::CIRDialect::getNoBuiltinsAttrName(),
+              mlir::ArrayAttr::get(&ctx, {}));
+    return;
+  }
+
+  llvm::SetVector<mlir::Attribute> nbFuncs;
+  auto addNoBuiltinAttr = [&ctx, &nbFuncs](StringRef builtinName) {
+    nbFuncs.insert(mlir::StringAttr::get(&ctx, builtinName));
+  };
+
+  // Then, add attributes for builtins specified through -fno-builtin-<name>.
+  llvm::for_each(langOpts.NoBuiltinFuncs, addNoBuiltinAttr);
+
+  if (nba) {
----------------
bcardosolopes wrote:

get rid of this curly?

https://github.com/llvm/llvm-project/pull/178899