[Mlir-commits] [mlir] [MLIR][LLVM] Attach kernel metadata representation to `llvm.func` (PR #101314)

[Tobias Gysi]

================
@@ -1247,6 +1247,41 @@ static LogicalResult checkedAddLLVMFnAttribute(Location loc,
   return success();
 }
 
+/// Return a representation of `value` as metadata.
+static llvm::Metadata *convertIntegerToMetadata(llvm::LLVMContext &context,
+                                                const llvm::APInt &value) {
+  llvm::Constant *constant = llvm::ConstantInt::get(context, value);
+  return llvm::ConstantAsMetadata::get(constant);
+}
+
+/// Return a representation of `value` as an MDNode.
+static llvm::MDNode *convertIntegerToMDNode(llvm::LLVMContext &context,
+                                            const llvm::APInt &value) {
+  return llvm::MDNode::get(context, convertIntegerToMetadata(context, value));
+}
+
+/// Return an MDNode encoding `vec_type_hint` metadata.
+static llvm::MDNode *convertVecTypeHintToMDNode(llvm::LLVMContext &context,
+                                                llvm::Type *type,
+                                                bool isSigned) {
+  llvm::Metadata *typeMD =
+      llvm::ConstantAsMetadata::get(llvm::UndefValue::get(type));
+  llvm::Metadata *isSignedMD =
+      convertIntegerToMetadata(context, llvm::APInt(32, isSigned ? 1 : 0));
+  return llvm::MDNode::get(context, {typeMD, isSignedMD});
+}
+
+/// Return an MDNode with a tuple given by the values in the input integer array
+/// attribute.
+static llvm::MDNode *convertIntegerArrayToMDNode(llvm::LLVMContext &context,
+                                                 ArrayRef<int32_t> values) {
+  llvm::SmallVector<llvm::Metadata *> mds;
----------------
gysit wrote:

```suggestion
  SmallVector<llvm::Metadata *> mds;
```
nit: The namespace is probably not needed.

https://github.com/llvm/llvm-project/pull/101314