diff --git a/mlir/include/mlir/IR/AttributeSupport.h b/mlir/include/mlir/IR/AttributeSupport.h
--- a/mlir/include/mlir/IR/AttributeSupport.h
+++ b/mlir/include/mlir/IR/AttributeSupport.h
@@ -251,6 +251,75 @@
 };
 } // namespace detail
 
+namespace AttributeTrait {
+
+/// This trait provides an "ArrayRef-like" behavior by defining all the methods
+/// from ArrayRef. This expects the attribute to define an `getArray()` accessor
+/// for the underlying ArrayRef.
+template <typename T>
+struct ArrayRefAttr {
+  template <typename ConcreteType>
+  class Impl {
+    ArrayRef<T> crtp() const {
+      return static_cast<const ConcreteType *>(this)->getArray();
+    }
+
+  public:
+    using value_type = T;
+    using pointer = value_type *;
+    using const_pointer = const value_type *;
+    using reference = value_type &;
+    using const_reference = const value_type &;
+    using iterator = const_pointer;
+    using const_iterator = const_pointer;
+    using reverse_iterator = std::reverse_iterator<iterator>;
+    using const_reverse_iterator = std::reverse_iterator<const_iterator>;
+    using size_type = size_t;
+    using difference_type = ptrdiff_t;
+
+    operator ArrayRef<T>() { return crtp(); }
+
+    iterator begin() const { return crtp().begin(); }
+    iterator end() const { return crtp().end(); }
+    reverse_iterator rbegin() const { return crtp().rbegin(); }
+    reverse_iterator rend() const { return crtp().rend(); }
+    bool empty() const { return crtp().empty(); }
+    const T *data() const { return crtp().data(); }
+    size_t size() const { return crtp().size(); }
+    const T &front() const { return crtp().front(); }
+    const T &back() const { return crtp().back(); }
+    template <typename Allocator>
+    ArrayRef<T> copy(Allocator &A) {
+      return crtp().copy(A);
+    }
+    bool equals(ArrayRefAttr RHS) const { return crtp().equals(RHS->crtp()); }
+    ArrayRef<T> slice(size_t N, size_t M) const { return crtp().slice(N, M); }
+    ArrayRef<T> slice(size_t N) const { return crtp().slice(N); }
+    ArrayRef<T> drop_front(size_t N = 1) const { return crtp().drop_front(N); }
+    ArrayRef<T> drop_back(size_t N = 1) const { return crtp().drop_back(N); }
+    template <class PredicateT>
+    ArrayRef<T> drop_while(PredicateT Pred) const {
+      return crtp().drop_while(Pred);
+    }
+    template <class PredicateT>
+    ArrayRef<T> drop_until(PredicateT Pred) const {
+      return crtp().drop_until(Pred);
+    }
+    ArrayRef<T> take_front(size_t N = 1) const { return crtp().take_front(N); }
+    ArrayRef<T> take_back(size_t N = 1) const { return crtp().take_back(N); }
+    template <class PredicateT>
+    ArrayRef<T> take_while(PredicateT Pred) const {
+      return crtp().take_while(Pred);
+    }
+    template <class PredicateT>
+    ArrayRef<T> take_until(PredicateT Pred) const {
+      return crtp().take_until(Pred);
+    }
+    const T &operator[](size_t Index) const { return (*crtp())[Index]; }
+  };
+};
+
+} // namespace AttributeTrait
 } // namespace mlir
 
 #endif
diff --git a/mlir/include/mlir/IR/Builders.h b/mlir/include/mlir/IR/Builders.h
--- a/mlir/include/mlir/IR/Builders.h
+++ b/mlir/include/mlir/IR/Builders.h
@@ -142,6 +142,9 @@
   ArrayAttr getStrArrayAttr(ArrayRef<StringRef> values);
   ArrayAttr getTypeArrayAttr(TypeRange values);
 
+  // Dimension list is a Dense array of int64_t values.
+  DimensionListAttr getDimListAttr(ArrayRef<int64_t> values);
+
   // Affine expressions and affine maps.
   AffineExpr getAffineDimExpr(unsigned position);
   AffineExpr getAffineSymbolExpr(unsigned position);
diff --git a/mlir/include/mlir/IR/BuiltinAttributes.td b/mlir/include/mlir/IR/BuiltinAttributes.td
--- a/mlir/include/mlir/IR/BuiltinAttributes.td
+++ b/mlir/include/mlir/IR/BuiltinAttributes.td
@@ -339,6 +339,51 @@
   let skipDefaultBuilders = 1;
 }
 
+
+//===----------------------------------------------------------------------===//
+// DimensionListAttr
+//===----------------------------------------------------------------------===//
+
+def Builtin_DimensionListAttr : Builtin_Attr<
+    "DimensionList", [ArrayRefAttrTrait<"int64_t">]> {
+  let mnemonic = "dims";
+  let summary = "An Attribute containing a dense array of in64_t, suitable to "
+    "model a list of dimensions or a subscript for example.";
+  let description = [{
+    Syntax:
+
+    ```
+    `dims` `<` <comma separate list of integers> `>`
+    ```
+
+    For example: `dims<42, -5>` or `dims<>`.
+
+    When used embedded in an operation, it is displayed with an array syntax:
+
+    ```
+    `dims` `<` <comma separate list of integers> `>`
+    ```
+
+    For example: `test.op [42, -5]`.
+  }];
+  let parameters = (ins ArrayRefParameter<"int64_t">:$array);
+  let returnType = "llvm::ArrayRef<int64_t>";
+  let assemblyFormat = "`[` $array `]`";
+}
+
+class DimensionListAttrOfSize<int n> : Confined<Builtin_DimensionListAttr,
+   [AttrConstraint<
+      CPred<"$_self.cast<::mlir::DimensionListAttr>().size() == " #n>,
+            "with exactly " # n # " elements">
+   ]>;
+
+class DimensionListAttrOfMaxSize<int n> : Confined<Builtin_DimensionListAttr,
+   [AttrConstraint<
+      CPred<"$_self.cast<::mlir::DimensionListAttr>().size() <= " #n>,
+            "with at most " # n # " elements">
+   ]>;
+
+
 //===----------------------------------------------------------------------===//
 // DictionaryAttr
 //===----------------------------------------------------------------------===//
diff --git a/mlir/include/mlir/IR/OpBase.td b/mlir/include/mlir/IR/OpBase.td
--- a/mlir/include/mlir/IR/OpBase.td
+++ b/mlir/include/mlir/IR/OpBase.td
@@ -3168,4 +3168,8 @@
                                  string derivedType = "::mlir::Type"> :
     AttrOrTypeParameter<derivedType, desc> {}
 
+// Attribute Trait for the native `ArrayRefAttr`.
+class ArrayRefAttrTrait<string T> : ParamNativeAttrTrait<"ArrayRefAttr", T> {}
+
+
 #endif // OP_BASE
diff --git a/mlir/lib/IR/AsmPrinter.cpp b/mlir/lib/IR/AsmPrinter.cpp
--- a/mlir/lib/IR/AsmPrinter.cpp
+++ b/mlir/lib/IR/AsmPrinter.cpp
@@ -1293,6 +1293,8 @@
   /// used instead of individual elements when the elements attr is large.
   void printDenseElementsAttr(DenseElementsAttr attr, bool allowHex);
 
+  void printDimensionListAttr(DimensionListAttr attr);
+
   /// Print a dense string elements attribute.
   void printDenseStringElementsAttr(DenseStringElementsAttr attr);
 
@@ -1726,6 +1728,11 @@
       os << '>';
     }
 
+  } else if (auto dimsList = attr.dyn_cast<DimensionListAttr>()) {
+    os << "dims<";
+    printDimensionListAttr(dimsList);
+    os << '>';
+
   } else if (auto strEltAttr = attr.dyn_cast<DenseStringElementsAttr>()) {
     if (printerFlags.shouldElideElementsAttr(strEltAttr)) {
       printElidedElementsAttr(os);
@@ -1899,6 +1906,10 @@
   }
 }
 
+void AsmPrinter::Impl::printDimensionListAttr(DimensionListAttr attr) {
+  llvm::interleaveComma(attr, os);
+}
+
 void AsmPrinter::Impl::printDenseStringElementsAttr(
     DenseStringElementsAttr attr) {
   ArrayRef<StringRef> data = attr.getRawStringData();
diff --git a/mlir/lib/IR/Builders.cpp b/mlir/lib/IR/Builders.cpp
--- a/mlir/lib/IR/Builders.cpp
+++ b/mlir/lib/IR/Builders.cpp
@@ -227,6 +227,10 @@
   return getArrayAttr(attrs);
 }
 
+DimensionListAttr Builder::getDimListAttr(ArrayRef<int64_t> values) {
+  return DimensionListAttr::get(getContext(), values);
+}
+
 ArrayAttr Builder::getIndexArrayAttr(ArrayRef<int64_t> values) {
   auto attrs = llvm::to_vector<8>(
       llvm::map_range(values, [this](int64_t v) -> Attribute {
diff --git a/mlir/lib/IR/BuiltinAttributes.cpp b/mlir/lib/IR/BuiltinAttributes.cpp
--- a/mlir/lib/IR/BuiltinAttributes.cpp
+++ b/mlir/lib/IR/BuiltinAttributes.cpp
@@ -11,13 +11,16 @@
 #include "mlir/IR/AffineMap.h"
 #include "mlir/IR/BuiltinDialect.h"
 #include "mlir/IR/Dialect.h"
+#include "mlir/IR/DialectImplementation.h"
 #include "mlir/IR/IntegerSet.h"
+#include "mlir/IR/OpImplementation.h"
 #include "mlir/IR/Operation.h"
 #include "mlir/IR/SymbolTable.h"
 #include "mlir/IR/Types.h"
 #include "mlir/Interfaces/DecodeAttributesInterfaces.h"
 #include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/Sequence.h"
+#include "llvm/ADT/TypeSwitch.h"
 #include "llvm/Support/Endian.h"
 
 using namespace mlir;
@@ -36,10 +39,10 @@
 
 void BuiltinDialect::registerAttributes() {
   addAttributes<AffineMapAttr, ArrayAttr, DenseIntOrFPElementsAttr,
-                DenseStringElementsAttr, DictionaryAttr, FloatAttr,
-                SymbolRefAttr, IntegerAttr, IntegerSetAttr, OpaqueAttr,
-                OpaqueElementsAttr, SparseElementsAttr, StringAttr, TypeAttr,
-                UnitAttr>();
+                DimensionListAttr, DenseStringElementsAttr, DictionaryAttr,
+                FloatAttr, SymbolRefAttr, IntegerAttr, IntegerSetAttr,
+                OpaqueAttr, OpaqueElementsAttr, SparseElementsAttr, StringAttr,
+                TypeAttr, UnitAttr>();
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/mlir/lib/Parser/AttributeParser.cpp b/mlir/lib/Parser/AttributeParser.cpp
--- a/mlir/lib/Parser/AttributeParser.cpp
+++ b/mlir/lib/Parser/AttributeParser.cpp
@@ -90,6 +90,10 @@
   case Token::kw_dense:
     return parseDenseElementsAttr(type);
 
+  // Parse a dimension lists attribute.
+  case Token::kw_dims:
+    return parseDimensionListAttr();
+
   // Parse a dictionary attribute.
   case Token::l_brace: {
     NamedAttrList elements;
@@ -831,6 +835,31 @@
   return literalParser.getAttr(loc, type);
 }
 
+Attribute Parser::parseDimensionListAttr() {
+  consumeToken(Token::kw_dims);
+  SmallVector<int64_t> dims;
+  auto parseElement = [&]() -> LogicalResult {
+    if (getToken().is(Token::greater))
+      return success();
+    bool negative = false;
+    if (getToken().is(Token::minus)) {
+      negative = true;
+      consumeToken();
+    }
+    if (getToken().isNot(Token::integer))
+      return emitError("expected integer in dimensions list");
+    Optional<uint64_t> value = getToken().getUInt64IntegerValue();
+    if (!value || *value > std::numeric_limits<int64_t>::max())
+      return emitError("integer overflow in dimensions list");
+    dims.emplace_back(negative ? -*value : *value);
+    consumeToken();
+    return success();
+  };
+  if (parseCommaSeparatedList(Delimiter::LessGreater, parseElement))
+    return nullptr;
+  return DimensionListAttr::get(getContext(), dims);
+}
+
 /// Parse an opaque elements attribute.
 Attribute Parser::parseOpaqueElementsAttr(Type attrType) {
   consumeToken(Token::kw_opaque);
diff --git a/mlir/lib/Parser/Parser.h b/mlir/lib/Parser/Parser.h
--- a/mlir/lib/Parser/Parser.h
+++ b/mlir/lib/Parser/Parser.h
@@ -259,6 +259,9 @@
   Attribute parseDenseElementsAttr(Type attrType);
   ShapedType parseElementsLiteralType(Type type);
 
+  /// Parse a dimension lists attribute.
+  Attribute parseDimensionListAttr();
+
   /// Parse a sparse elements attribute.
   Attribute parseSparseElementsAttr(Type attrType);
 
diff --git a/mlir/lib/Parser/TokenKinds.def b/mlir/lib/Parser/TokenKinds.def
--- a/mlir/lib/Parser/TokenKinds.def
+++ b/mlir/lib/Parser/TokenKinds.def
@@ -82,6 +82,7 @@
 TOK_KEYWORD(ceildiv)
 TOK_KEYWORD(complex)
 TOK_KEYWORD(dense)
+TOK_KEYWORD(dims)
 TOK_KEYWORD(f16)
 TOK_KEYWORD(f32)
 TOK_KEYWORD(f64)
diff --git a/mlir/test/IR/attribute.mlir b/mlir/test/IR/attribute.mlir
--- a/mlir/test/IR/attribute.mlir
+++ b/mlir/test/IR/attribute.mlir
@@ -603,6 +603,37 @@
   return
 }
 
+// -----
+
+//===----------------------------------------------------------------------===//
+// Test DimensionListAttr
+//===----------------------------------------------------------------------===//
+
+// CHECK-LABEL: func @dim_lists
+func @dim_lists() {
+  // CHECK: test.dim_list_attr
+  // CHECK-SAME: attr1 = dims<6>
+  // CHECK-SAME: attr2 = dims<-1, 2, 3>
+  // CHECK-SAME: unregistered_attr = dims<>
+  "test.dim_list_attr"() {
+    attr1 = dims<6>,
+    attr2 = dims<-1, 2, 3>,
+    unregistered_attr = dims<>
+  } : () -> ()
+  return
+}
+
+// -----
+
+// CHECK-LABEL: func @dim_list_attr_custom
+func @dim_list_attr_custom() {
+  // CHECK: test.dim_list_attr_custom
+  // CHECK-SAME: theDims : [6]
+  test.dim_list_attr_custom theDims : [6]
+  return
+}
+
+
 // -----
 
 func @wrong_shape_fail() {
diff --git a/mlir/test/lib/Dialect/Test/CMakeLists.txt b/mlir/test/lib/Dialect/Test/CMakeLists.txt
--- a/mlir/test/lib/Dialect/Test/CMakeLists.txt
+++ b/mlir/test/lib/Dialect/Test/CMakeLists.txt
@@ -14,8 +14,8 @@
 add_public_tablegen_target(MLIRTestInterfaceIncGen)
 
 set(LLVM_TARGET_DEFINITIONS TestOps.td)
-mlir_tablegen(TestAttrDefs.h.inc -gen-attrdef-decls)
-mlir_tablegen(TestAttrDefs.cpp.inc -gen-attrdef-defs)
+mlir_tablegen(TestAttrDefs.h.inc -gen-attrdef-decls -attrdefs-dialect=test)
+mlir_tablegen(TestAttrDefs.cpp.inc -gen-attrdef-defs -attrdefs-dialect=test)
 add_public_tablegen_target(MLIRTestAttrDefIncGen)
 
 set(LLVM_TARGET_DEFINITIONS TestTypeDefs.td)
diff --git a/mlir/test/lib/Dialect/Test/TestOps.td b/mlir/test/lib/Dialect/Test/TestOps.td
--- a/mlir/test/lib/Dialect/Test/TestOps.td
+++ b/mlir/test/lib/Dialect/Test/TestOps.td
@@ -12,6 +12,7 @@
 include "TestDialect.td"
 include "mlir/Dialect/DLTI/DLTIBase.td"
 include "mlir/IR/EnumAttr.td"
+include "mlir/IR/BuiltinAttributes.td"
 include "mlir/IR/OpBase.td"
 include "mlir/IR/OpAsmInterface.td"
 include "mlir/IR/RegionKindInterface.td"
@@ -273,6 +274,20 @@
   );
 }
 
+def DimListAttrOp : TEST_Op<"dim_list_attr"> {
+  let arguments = (ins
+      Builtin_DimensionListAttr:$attr1,
+      Builtin_DimensionListAttr:$attr2
+  );
+}
+
+def DimListAttrCustomAsmOp : TEST_Op<"dim_list_attr_custom"> {
+  let arguments = (ins
+      Builtin_DimensionListAttr:$attr1
+  );
+  let assemblyFormat = "`theDims` `:` $attr1 attr-dict";
+}
+
 def DerivedTypeAttrOp : TEST_Op<"derived_type_attr", []> {
   let results = (outs AnyTensor:$output);
   DerivedTypeAttr element_dtype =
diff --git a/utils/bazel/llvm-project-overlay/mlir/test/BUILD.bazel b/utils/bazel/llvm-project-overlay/mlir/test/BUILD.bazel
--- a/utils/bazel/llvm-project-overlay/mlir/test/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/mlir/test/BUILD.bazel
@@ -146,11 +146,17 @@
     strip_include_prefix = "lib/Dialect/Test",
     tbl_outs = [
         (
-            ["-gen-attrdef-decls"],
+            [
+                "-gen-attrdef-decls",
+                "--attrdefs-dialect=test",
+            ],
             "lib/Dialect/Test/TestAttrDefs.h.inc",
         ),
         (
-            ["-gen-attrdef-defs"],
+            [
+                "-gen-attrdef-defs",
+                "--attrdefs-dialect=test",
+            ],
             "lib/Dialect/Test/TestAttrDefs.cpp.inc",
         ),
     ],