[mlir][dlti] Query by strings (#126716)

Adds DLTI utility to query using strings directly as keys.

Author: adam-smnk

mlir/include/mlir/Dialect/DLTI/DLTI.h

@@ -28,6 +28,12 @@ namespace dlti {
 /// query interface-implementing attrs, starting from attr obtained from `op`.
 FailureOr<Attribute> query(Operation *op, ArrayRef<DataLayoutEntryKey> keys,
                            bool emitError = false);
+
+/// Perform a DLTI-query at `op` using each string in `keys` as a separate DLTI
+/// entry key, recursively querying on query interface-implementing attrs,
+/// starting from attr obtained from `op`.
+FailureOr<Attribute> query(Operation *op, ArrayRef<StringRef> keys,
+                           bool emitError = false);
 } // namespace dlti
 } // namespace mlir
 

mlir/lib/Dialect/DLTI/DLTI.cpp

@@ -508,6 +508,9 @@ getClosestQueryable(Operation *op) {
 
 FailureOr<Attribute>
 dlti::query(Operation *op, ArrayRef<DataLayoutEntryKey> keys, bool emitError) {
+  if (!op)
+    return failure();
+
   if (keys.empty()) {
     if (emitError) {
       auto diag = op->emitError() << "target op of failed DLTI query";
@@ -562,6 +565,19 @@ dlti::query(Operation *op, ArrayRef<DataLayoutEntryKey> keys, bool emitError) {
   return currentAttr;
 }
 
+FailureOr<Attribute> dlti::query(Operation *op, ArrayRef<StringRef> keys,
+                                 bool emitError) {
+  if (!op)
+    return failure();
+
+  MLIRContext *ctx = op->getContext();
+  SmallVector<DataLayoutEntryKey> entryKeys(keys.size());
+  for (StringRef key : keys)
+    entryKeys.push_back(StringAttr::get(ctx, key));
+
+  return dlti::query(op, entryKeys, emitError);
+}
+
 constexpr const StringLiteral mlir::DLTIDialect::kDataLayoutAttrName;
 constexpr const StringLiteral mlir::DLTIDialect::kDataLayoutEndiannessKey;
 constexpr const StringLiteral mlir::DLTIDialect::kDataLayoutEndiannessBig;