[Mlir-commits] [mlir] [mlir] Add llvm.linker.options operation to the LLVM IR Dialect (PR #71720)

[Oleksandr Alex Zinenko]

================
@@ -1825,4 +1825,42 @@ def LLVM_CallIntrinsicOp
   let hasVerifier = 1;
 }
 
+def LLVM_LinkerOptionsOp
+    : LLVM_Op<"linker.options"> {
+  let summary = "Options to pass to the linker when the object file is linked";
+  let description = [{
+    Pass the given options to the linker when the resulting object file is linked.
+    This is used extensively on Windows to determine the C runtime that the object
+    files should link against.
+
+    Examples:
+    ```mlir
+    // Link against the MSVC static threaded CRT.
+    llvm.linker.options ["/DEFAULTLIB:", "libcmt"]
+
+    // Link against aarch64 compiler-rt builtins
+    llvm.linker.options ["-l", "clang_rt.builtins-aarch64"]
+    ```
+  }];
+  let arguments  = (ins StrArrayAttr:$options);
+  let assemblyFormat = [{
+    $options attr-dict
+  }];
+
+  let llvmBuilder = [{
+    llvm::Module *llvmModule = moduleTranslation.getLLVMModule();
+    llvm::LLVMContext &context = llvmModule->getContext();
+    llvm::NamedMDNode *linkerMDNode = llvmModule->getOrInsertNamedMetadata("llvm.linker.options");
+    SmallVector<llvm::Metadata*> MDNodes;
+    for (auto s : $options) {
+      auto str = cast<StringAttr>(s);
+      auto *MDNode = llvm::MDString::get(context, str.getValue());
+      MDNodes.push_back(MDNode);
+    }
+
+    auto *listMDNode = llvm::MDTuple::get(context, MDNodes);
+    linkerMDNode->addOperand(listMDNode);
----------------
ftynse wrote:

Nit: can we put this into a static function that we just call here? C++ embedded as strings into Tablegen is quite difficult to maintain.

https://github.com/llvm/llvm-project/pull/71720