[CIR][cir-link] Setup CIRLinkerInterface

Author: xlauko

clang/include/clang/CIR/Dialect/IR/CIRDialect.h

@@ -89,6 +89,11 @@ class SameFirstSecondOperandAndResultType
 } // namespace mlir
 
 namespace cir {
+
+/// Register the `CIRLinkerInterface` implementation of `LinkerInterface` within
+/// the CIR dialect.
+void registerLinkerInterface(mlir::DialectRegistry &registry);
+
 void buildTerminatedBody(mlir::OpBuilder &builder, mlir::Location loc);
 } // namespace cir
 

clang/include/clang/CIR/Interfaces/CIRLinkerInterface.h

@@ -0,0 +1,24 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines the interface to link CIR dialect.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CLANG_INTERFACES_CIR_CIRLINKINTERFACE_H_
+#define CLANG_INTERFACES_CIR_CIRLINKINTERFACE_H_
+
+namespace mlir {
+class DialectRegistry;
+} // namespace mlir
+
+namespace cir {
+void registerLinkerInterface(mlir::DialectRegistry &registry);
+} // namespace cir
+
+#endif // CLANG_INTERFACES_CIR_CIRLINKINTERFACE_H_

clang/lib/CIR/Interfaces/CIRLinkerInterface.cpp

@@ -0,0 +1,69 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines the interface to link CIR dialect.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/CIR/Interfaces/CIRLinkerInterface.h"
+#include "mlir/Linker/LinkerInterface.h"
+#include "clang/CIR/Dialect/IR/CIRDialect.h"
+
+using namespace mlir;
+using namespace mlir::link;
+
+//===----------------------------------------------------------------------===//
+// CIRSymbolLinkerInterface
+//===----------------------------------------------------------------------===//
+
+class CIRSymbolLinkerInterface : public SymbolLinkerInterface {
+public:
+  using SymbolLinkerInterface::SymbolLinkerInterface;
+
+  bool canBeLinked(Operation *op) const override { llvm_unreachable("NYI"); }
+
+  StringRef getSymbol(Operation *op) const override { llvm_unreachable("NYI"); }
+
+  Conflict findConflict(Operation *src) const override {
+    llvm_unreachable("NYI");
+  }
+
+  bool isLinkNeeded(Conflict pair, bool forDependency) const override {
+    llvm_unreachable("NYI");
+  }
+
+  LogicalResult resolveConflict(Conflict pair) override {
+    llvm_unreachable("NYI");
+  }
+
+  void registerForLink(Operation *op) override { llvm_unreachable("NYI"); }
+
+  LogicalResult initialize(ModuleOp src) override { return success(); }
+
+  LogicalResult link(LinkState &state) const override {
+    llvm_unreachable("NYI");
+  }
+
+  Operation *materialize(Operation *src, LinkState &state) const override {
+    llvm_unreachable("NYI");
+ }
+
+  SmallVector<Operation *> dependencies(Operation *op) const override {
+    llvm_unreachable("NYI");
+  }
+};
+
+//===----------------------------------------------------------------------===//
+// registerLinkerInterface
+//===----------------------------------------------------------------------===//
+
+void cir::registerLinkerInterface(mlir::DialectRegistry &registry) {
+  registry.addExtension(+[](mlir::MLIRContext *ctx, cir::CIRDialect *dialect) {
+    dialect->addInterfaces<CIRSymbolLinkerInterface>();
+  });
+}

clang/lib/CIR/Interfaces/CMakeLists.txt

@@ -1,6 +1,7 @@
 add_clang_library(MLIRCIRInterfaces
   ASTAttrInterfaces.cpp
   CIROpInterfaces.cpp
+  CIRLinkerInterface.cpp
   CIRLoopOpInterface.cpp
   CIRFPTypeInterface.cpp