diff --git a/mlir/docs/Dialects/Builtin.md b/mlir/docs/Dialects/Builtin.md
--- a/mlir/docs/Dialects/Builtin.md
+++ b/mlir/docs/Dialects/Builtin.md
@@ -23,6 +23,37 @@
 
 [include "Dialects/BuiltinLocationAttributes.md"]
 
+## DistinctAttribute
+
+A DistinctAttribute associates an attribute to a unique identifier.
+As a result, multiple DistinctAttribute instances may point to the same
+attribute. Every call to the `create` function allocates a new
+DistinctAttribute instance. The address of the attribute instance serves as a
+temporary unique identifier. Similar to the names of SSA values, the final
+unique identifiers are generated during pretty printing. This delayed
+numbering ensures the printed identifiers are deterministic even if
+multiple DistinctAttribute instances are created in-parallel.
+
+Syntax:
+
+```
+distinct-id ::= integer-literal
+distinct-attribute ::= `distinct` `[` distinct-id `]<` attribute `>`
+```
+
+Examples:
+
+```mlir
+#distinct = distinct[0]<42.0 : f32>
+#distinct1 = distinct[1]<42.0 : f32>
+#distinct2 = distinct[2]<array<i32: 10, 42>>
+```
+
+This mechanism is meant to generate attributes with a unique
+identifier, which can be used to mark groups of operations that share a
+common property. For example, groups of aliasing memory operations may be
+marked using one DistinctAttribute instance per alias group.
+
 ## Operations
 
 [include "Dialects/BuiltinOps.md"]
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
@@ -149,12 +149,14 @@
 
 namespace detail {
 class AttributeUniquer;
+class DistinctAttributeUniquer;
 } // namespace detail
 
 /// Base storage class appearing in an attribute. Derived storage classes should
 /// only be constructed within the context of the AttributeUniquer.
 class alignas(8) AttributeStorage : public StorageUniquer::BaseStorage {
   friend detail::AttributeUniquer;
+  friend detail::DistinctAttributeUniquer;
   friend StorageUniquer;
 
 public:
diff --git a/mlir/include/mlir/IR/BuiltinAttributes.h b/mlir/include/mlir/IR/BuiltinAttributes.h
--- a/mlir/include/mlir/IR/BuiltinAttributes.h
+++ b/mlir/include/mlir/IR/BuiltinAttributes.h
@@ -1000,6 +1000,43 @@
   return iterator<T>(llvm::seq<ptrdiff_t>(0, getNumElements()).begin(), mapFn);
 }
 
+//===----------------------------------------------------------------------===//
+// DistinctAttr
+//===----------------------------------------------------------------------===//
+
+namespace detail {
+struct DistinctAttrStorage;
+class DistinctAttributeUniquer;
+} // namespace detail
+
+/// An attribute that associates a referenced attribute to a unique identifier.
+/// Every call to the create function allocates a new distinct attribute
+/// instance. The address of the attribute instance serves as a temporary
+/// identifier. Similar to the names of SSA values, the final identifiers are
+/// generated during pretty printing. This delayed numbering ensures the
+/// printed identifiers are deterministic even if multiple distinct attribute
+/// instances are created in-parallel.
+///
+/// Examples:
+///
+/// #distinct = distinct[0]<42.0 : f32>
+/// #distinct1 = distinct[1]<42.0 : f32>
+/// #distinct2 = distinct[2]<array<i32: 10, 42>>
+class DistinctAttr
+    : public detail::StorageUserBase<DistinctAttr, Attribute,
+                                     detail::DistinctAttrStorage,
+                                     detail::DistinctAttributeUniquer> {
+public:
+  using Base::Base;
+
+  /// Returns the referenced attribute.
+  Attribute getReferencedAttr() const;
+
+  /// Creates a distinct attribute that associates a referenced attribute to a
+  /// unique identifier.
+  static DistinctAttr create(Attribute referencedAttr);
+};
+
 //===----------------------------------------------------------------------===//
 // StringAttr
 //===----------------------------------------------------------------------===//
diff --git a/mlir/include/mlir/IR/BuiltinDialectBytecode.td b/mlir/include/mlir/IR/BuiltinDialectBytecode.td
--- a/mlir/include/mlir/IR/BuiltinDialectBytecode.td
+++ b/mlir/include/mlir/IR/BuiltinDialectBytecode.td
@@ -181,6 +181,10 @@
   DenseElementsAttr:$values
 )>;
 
+def DistinctAttr : DialectAttribute<(attr
+  Attribute:$referencedAttr
+)>;
+
 // Types
 // -----
 
@@ -316,7 +320,8 @@
     DenseArrayAttr,
     DenseIntOrFPElementsAttr,
     DenseStringElementsAttr,
-    SparseElementsAttr
+    SparseElementsAttr,
+    DistinctAttr
   ];
 }
 
diff --git a/mlir/include/mlir/Support/ThreadLocalStore.h b/mlir/include/mlir/Support/ThreadLocalStore.h
new file mode 100644
--- /dev/null
+++ b/mlir/include/mlir/Support/ThreadLocalStore.h
@@ -0,0 +1,52 @@
+//===- ThreadLocalStore.h - ThreadLocalStore class --------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the ThreadLocalStore class. This class provides support for
+// allocating thread local objects that have a static lifetime.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef MLIR_SUPPORT_THREADLOCALSTORE_H
+#define MLIR_SUPPORT_THREADLOCALSTORE_H
+
+#include "mlir/Support/LLVM.h"
+#include "llvm/Support/Allocator.h"
+#include <utility>
+
+namespace mlir {
+/// This class allocates and stores thread local values of the given value type
+/// with static lifetime. A thread local bump pointer allocator ensures parallel
+/// allocations without any need for further synchronization.
+template <typename ValueT>
+class ThreadLocalStore {
+public:
+  ThreadLocalStore() = default;
+
+  ThreadLocalStore(ThreadLocalStore &&) = delete;
+  ThreadLocalStore(const ThreadLocalStore &) = delete;
+  ThreadLocalStore &operator=(const ThreadLocalStore &) = delete;
+
+  /// Allocates a value type instance for the current thread.
+  template <typename... Args>
+  ValueT *create(Args &&...args) {
+    static_assert(std::is_trivially_destructible_v<ValueT>,
+                  "expected value type to be trivially destructible");
+    return new (getStaticAllocator().Allocate<ValueT>())
+        ValueT(std::forward<Args>(args)...);
+  }
+
+private:
+  /// Returns the static thread local bump pointer allocator.
+  static llvm::BumpPtrAllocator &getStaticAllocator() {
+    static LLVM_THREAD_LOCAL llvm::BumpPtrAllocator allocator;
+    return allocator;
+  }
+};
+} // namespace mlir
+
+#endif // MLIR_SUPPORT_THREADLOCALSTORE_H
diff --git a/mlir/lib/AsmParser/AttributeParser.cpp b/mlir/lib/AsmParser/AttributeParser.cpp
--- a/mlir/lib/AsmParser/AttributeParser.cpp
+++ b/mlir/lib/AsmParser/AttributeParser.cpp
@@ -46,6 +46,7 @@
 ///                      `:` (tensor-type | vector-type)
 ///                    | `strided` `<` `[` comma-separated-int-or-question `]`
 ///                      (`,` `offset` `:` integer-literal)? `>`
+///                    | distinct-attribute
 ///                    | extended-attribute
 ///
 Attribute Parser::parseAttribute(Type type) {
@@ -155,6 +156,10 @@
   case Token::kw_strided:
     return parseStridedLayoutAttr();
 
+  // Parse a distinct attribute.
+  case Token::kw_distinct:
+    return parseDistinctAttr(type);
+
   // Parse a string attribute.
   case Token::string: {
     auto val = getToken().getStringValue();
@@ -1214,3 +1219,53 @@
   return StridedLayoutAttr::get(getContext(), *offset, strides);
   // return getChecked<StridedLayoutAttr>(loc,getContext(), *offset, strides);
 }
+
+/// Parse a distinct attribute.
+///
+///  distinct-attribute ::= `distinct`
+///                         `[` integer-literal `]<` attribute-value `>`
+///
+Attribute Parser::parseDistinctAttr(Type type) {
+  consumeToken(Token::kw_distinct);
+  if (parseToken(Token::l_square, "expected '[' after 'distinct'"))
+    return {};
+
+  // Parse the distinct integer identifier.
+  Token token = getToken();
+  if (parseToken(Token::integer, "expected distinct Id"))
+    return {};
+  std::optional<uint64_t> value = token.getUInt64IntegerValue();
+  if (!value) {
+    emitError("expected an unsigned 64-bit integer");
+    return {};
+  }
+
+  // Parse the referenced attribute.
+  if (parseToken(Token::r_square, "expected ']' to close distinct Id") ||
+      parseToken(Token::less, "expected '<' after distinct Id"))
+    return {};
+  Attribute referencedAttr = parseAttribute(type);
+  if (!referencedAttr) {
+    emitError("expected attribute");
+    return {};
+  }
+
+  // Add the distinct attribute to the parser state, if it has not been parsed
+  // before. Otherwise, check if the parsed reference attribute matches the one
+  // found in the parser state.
+  DenseMap<uint64_t, DistinctAttr> &distinctAttrs =
+      state.symbols.distinctAttributes;
+  auto it = distinctAttrs.find(*value);
+  if (it == distinctAttrs.end()) {
+    DistinctAttr distinctAttr = DistinctAttr::create(referencedAttr);
+    it = distinctAttrs.try_emplace(*value, distinctAttr).first;
+  } else if (it->getSecond().getReferencedAttr() != referencedAttr) {
+    emitError("referenced attribute does not match previous definition");
+    return {};
+  }
+
+  if (parseToken(Token::greater, "expected '>' to close distinct attribute"))
+    return {};
+
+  return it->getSecond();
+}
diff --git a/mlir/lib/AsmParser/Parser.h b/mlir/lib/AsmParser/Parser.h
--- a/mlir/lib/AsmParser/Parser.h
+++ b/mlir/lib/AsmParser/Parser.h
@@ -250,6 +250,9 @@
   /// Parse an attribute dictionary.
   ParseResult parseAttributeDict(NamedAttrList &attributes);
 
+  /// Parse a distinct attribute.
+  Attribute parseDistinctAttr(Type type);
+
   /// Parse an extended attribute.
   Attribute parseExtendedAttr(Type type);
 
diff --git a/mlir/lib/AsmParser/ParserState.h b/mlir/lib/AsmParser/ParserState.h
--- a/mlir/lib/AsmParser/ParserState.h
+++ b/mlir/lib/AsmParser/ParserState.h
@@ -36,6 +36,9 @@
   DenseMap<const OpAsmDialectInterface *,
            llvm::StringMap<std::pair<std::string, AsmDialectResourceHandle>>>
       dialectResources;
+
+  /// A map from unique integer identifier to DistinctAttr.
+  DenseMap<uint64_t, DistinctAttr> distinctAttributes;
 };
 
 //===----------------------------------------------------------------------===//
diff --git a/mlir/lib/AsmParser/TokenKinds.def b/mlir/lib/AsmParser/TokenKinds.def
--- a/mlir/lib/AsmParser/TokenKinds.def
+++ b/mlir/lib/AsmParser/TokenKinds.def
@@ -89,6 +89,7 @@
 TOK_KEYWORD(complex)
 TOK_KEYWORD(dense)
 TOK_KEYWORD(dense_resource)
+TOK_KEYWORD(distinct)
 TOK_KEYWORD(f16)
 TOK_KEYWORD(f32)
 TOK_KEYWORD(f64)
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
@@ -806,6 +806,8 @@
     } else if (llvm::isa<AffineMapAttr, DenseArrayAttr, FloatAttr, IntegerAttr,
                          IntegerSetAttr, UnitAttr>(attr)) {
       return;
+    } else if (auto distinctAttr = dyn_cast<DistinctAttr>(attr)) {
+      printAttribute(distinctAttr.getReferencedAttr());
     } else if (auto dictAttr = dyn_cast<DictionaryAttr>(attr)) {
       for (const NamedAttribute &nestedAttr : dictAttr.getValue()) {
         printAttribute(nestedAttr.getName());
@@ -1604,6 +1606,31 @@
   return name;
 }
 
+//===----------------------------------------------------------------------===//
+// DistinctState
+//===----------------------------------------------------------------------===//
+
+namespace {
+/// This class manages the state for distinct attributes.
+class DistinctState {
+public:
+  /// Returns a unique identifier for the given distinct attribute.
+  uint64_t getId(DistinctAttr distinctAttr);
+
+private:
+  uint64_t distinctCounter = 0;
+  DenseMap<DistinctAttr, uint64_t> distinctAttrMap;
+};
+} // namespace
+
+uint64_t DistinctState::getId(DistinctAttr distinctAttr) {
+  auto [it, inserted] =
+      distinctAttrMap.try_emplace(distinctAttr, distinctCounter);
+  if (inserted)
+    distinctCounter++;
+  return it->getSecond();
+}
+
 //===----------------------------------------------------------------------===//
 // Resources
 //===----------------------------------------------------------------------===//
@@ -1715,6 +1742,9 @@
   /// Get the state used for SSA names.
   SSANameState &getSSANameState() { return nameState; }
 
+  /// Get the state used for distinct attribute identifiers.
+  DistinctState &getDistinctState() { return distinctState; }
+
   /// Return the dialects within the context that implement
   /// OpAsmDialectInterface.
   DialectInterfaceCollection<OpAsmDialectInterface> &getDialectInterfaces() {
@@ -1758,6 +1788,9 @@
   /// The state used for SSA value names.
   SSANameState nameState;
 
+  /// The state used for distinct attribute identifiers.
+  DistinctState distinctState;
+
   /// Flags that control op output.
   OpPrintingFlags printerFlags;
 
@@ -2106,6 +2139,11 @@
   } else if (llvm::isa<UnitAttr>(attr)) {
     os << "unit";
     return;
+  } else if (auto distinctAttr = llvm::dyn_cast<DistinctAttr>(attr)) {
+    os << "distinct[" << state.getDistinctState().getId(distinctAttr) << "]<";
+    printAttribute(distinctAttr.getReferencedAttr());
+    os << '>';
+    return;
   } else if (auto dictAttr = llvm::dyn_cast<DictionaryAttr>(attr)) {
     os << '{';
     interleaveComma(dictAttr.getValue(),
diff --git a/mlir/lib/IR/AttributeDetail.h b/mlir/lib/IR/AttributeDetail.h
--- a/mlir/lib/IR/AttributeDetail.h
+++ b/mlir/lib/IR/AttributeDetail.h
@@ -14,6 +14,7 @@
 #define ATTRIBUTEDETAIL_H_
 
 #include "mlir/IR/AffineMap.h"
+#include "mlir/IR/AttributeSupport.h"
 #include "mlir/IR/BuiltinAttributes.h"
 #include "mlir/IR/BuiltinTypes.h"
 #include "mlir/IR/IntegerSet.h"
@@ -349,6 +350,48 @@
   Dialect *referencedDialect;
 };
 
+//===----------------------------------------------------------------------===//
+// DistinctAttr
+//===----------------------------------------------------------------------===//
+
+/// An attribute to store a distinct reference to another attribute.
+struct DistinctAttrStorage : public AttributeStorage {
+  using KeyTy = Attribute;
+
+  DistinctAttrStorage(Attribute referencedAttr)
+      : referencedAttr(referencedAttr) {}
+
+  /// Returns the referenced attribute as key.
+  KeyTy getAsKey() const { return KeyTy(referencedAttr); }
+
+  /// The referenced attribute.
+  Attribute referencedAttr;
+};
+
+/// A specialized attribute uniquer for distinct attributes that always
+/// allocates since the distinct attribute instances use the address of their
+/// storage as unique identifier.
+class DistinctAttributeUniquer {
+public:
+  /// Creates a distinct attribute storage. Allocates every time since the
+  /// address of the storage serves as unique identifier.
+  template <typename T, typename... Args>
+  static T get(MLIRContext *context, Args &&...args) {
+    static_assert(std::is_same_v<typename T::ImplType, DistinctAttrStorage>,
+                  "expects a distinct attribute storage");
+    DistinctAttrStorage *storage = DistinctAttributeUniquer::allocateStorage(
+        context, std::forward<Args>(args)...);
+    storage->initializeAbstractAttribute(
+        AbstractAttribute::lookup(DistinctAttr::getTypeID(), context));
+    return storage;
+  }
+
+private:
+  /// Allocates a distinct attribute storage.
+  static DistinctAttrStorage *allocateStorage(MLIRContext *context,
+                                              Attribute referencedAttr);
+};
+
 } // namespace detail
 } // namespace mlir
 
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
@@ -42,6 +42,7 @@
 #define GET_ATTRDEF_LIST
 #include "mlir/IR/BuiltinAttributes.cpp.inc"
       >();
+  addAttributes<DistinctAttr>();
 }
 
 //===----------------------------------------------------------------------===//
@@ -1745,6 +1746,18 @@
   return success();
 }
 
+//===----------------------------------------------------------------------===//
+// DistinctAttr
+//===----------------------------------------------------------------------===//
+
+DistinctAttr DistinctAttr::create(Attribute referencedAttr) {
+  return Base::get(referencedAttr.getContext(), referencedAttr);
+}
+
+Attribute DistinctAttr::getReferencedAttr() const {
+  return getImpl()->referencedAttr;
+}
+
 //===----------------------------------------------------------------------===//
 // Attribute Utilities
 //===----------------------------------------------------------------------===//
diff --git a/mlir/lib/IR/BuiltinDialect.cpp b/mlir/lib/IR/BuiltinDialect.cpp
--- a/mlir/lib/IR/BuiltinDialect.cpp
+++ b/mlir/lib/IR/BuiltinDialect.cpp
@@ -60,6 +60,10 @@
       os << "loc";
       return AliasResult::OverridableAlias;
     }
+    if (llvm::isa<DistinctAttr>(attr)) {
+      os << "distinct";
+      return AliasResult::OverridableAlias;
+    }
     return AliasResult::NoAlias;
   }
 
diff --git a/mlir/lib/IR/BuiltinDialectBytecode.cpp b/mlir/lib/IR/BuiltinDialectBytecode.cpp
--- a/mlir/lib/IR/BuiltinDialectBytecode.cpp
+++ b/mlir/lib/IR/BuiltinDialectBytecode.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "BuiltinDialectBytecode.h"
+#include "AttributeDetail.h"
 #include "mlir/Bytecode/BytecodeImplementation.h"
 #include "mlir/IR/BuiltinAttributes.h"
 #include "mlir/IR/BuiltinDialect.h"
diff --git a/mlir/lib/IR/MLIRContext.cpp b/mlir/lib/IR/MLIRContext.cpp
--- a/mlir/lib/IR/MLIRContext.cpp
+++ b/mlir/lib/IR/MLIRContext.cpp
@@ -25,6 +25,7 @@
 #include "mlir/IR/Location.h"
 #include "mlir/IR/OpImplementation.h"
 #include "mlir/IR/Types.h"
+#include "mlir/Support/ThreadLocalStore.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/SmallString.h"
@@ -247,6 +248,10 @@
   DenseMap<StringRef, SmallVector<StringAttrStorage *>>
       dialectReferencingStrAttrs;
 
+  /// A store for distinct attributes that allocates every time since the
+  /// address of the storage serves as unique identifier.
+  ThreadLocalStore<DistinctAttrStorage> distinctAttrStore;
+
 public:
   MLIRContextImpl(bool threadingIsEnabled)
       : threadingIsEnabled(threadingIsEnabled) {
@@ -1059,6 +1064,12 @@
   return context->getImpl().unknownLocAttr;
 }
 
+DistinctAttrStorage *
+detail::DistinctAttributeUniquer::allocateStorage(MLIRContext *context,
+                                                  Attribute referencedAttr) {
+  return context->getImpl().distinctAttrStore.create(referencedAttr);
+}
+
 /// Return empty dictionary.
 DictionaryAttr DictionaryAttr::getEmpty(MLIRContext *context) {
   return context->getImpl().emptyDictionaryAttr;
diff --git a/mlir/test/Dialect/Builtin/Bytecode/attrs.mlir b/mlir/test/Dialect/Builtin/Bytecode/attrs.mlir
--- a/mlir/test/Dialect/Builtin/Bytecode/attrs.mlir
+++ b/mlir/test/Dialect/Builtin/Bytecode/attrs.mlir
@@ -128,6 +128,20 @@
   bytecode.type = i178
 } {}
 
+//===----------------------------------------------------------------------===//
+// DistinctAttr
+//===----------------------------------------------------------------------===//
+
+// CHECK-LABEL: @TestDistinct
+module @TestDistinct attributes {
+  // CHECK: bytecode.distinct = distinct[0]<42 : i32>
+  // CHECK: bytecode.distinct2 = distinct[0]<42 : i32>
+  // CHECK: bytecode.distinct3 = distinct[1]<42 : i32>
+  bytecode.distinct = distinct[0]<42 : i32>,
+  bytecode.distinct2 = distinct[0]<42 : i32>,
+  bytecode.distinct3 = distinct[1]<42 : i32>
+} {}
+
 //===----------------------------------------------------------------------===//
 // CallSiteLoc
 //===----------------------------------------------------------------------===//
diff --git a/mlir/test/IR/distinct-attr.mlir b/mlir/test/IR/distinct-attr.mlir
new file mode 100644
--- /dev/null
+++ b/mlir/test/IR/distinct-attr.mlir
@@ -0,0 +1,22 @@
+// RUN: mlir-opt -allow-unregistered-dialect %s | FileCheck %s
+// RUN: mlir-opt -allow-unregistered-dialect -mlir-print-local-scope %s | FileCheck %s --check-prefix=CHECK-GENERIC
+
+// CHECK: #[[DISTINCT0:.*]] = distinct[0]<42 : i32>
+// CHECK: #[[DISTINCT1:.*]] = distinct[1]<array<i32: 10, 42>>
+// CHECK: #[[DISTINCT2:.*]] = distinct[2]<42 : i32>
+
+// CHECK:         distinct.attr = #[[DISTINCT0]]
+// CHECK-GENERIC: distinct.attr = distinct[0]<42 : i32>
+"foo.op"() {distinct.attr = distinct[0]<42 : i32>} : () -> ()
+
+// CHECK:         distinct.attr = #[[DISTINCT1]]
+// CHECK-GENERIC: distinct.attr = distinct[1]<array<i32: 10, 42>>
+"foo.op"() {distinct.attr = distinct[1]<array<i32: 10, 42>>} : () -> ()
+
+// CHECK:         distinct.attr = #[[DISTINCT0]]
+// CHECK-GENERIC: distinct.attr = distinct[0]<42 : i32>
+"foo.op"() {distinct.attr = distinct[0]<42 : i32>} : () -> ()
+
+// CHECK:         distinct.attr = #[[DISTINCT2]]
+// CHECK-GENERIC: distinct.attr = distinct[2]<42 : i32>
+"foo.op"() {distinct.attr = distinct[42]<42 : i32>} : () -> ()
diff --git a/mlir/test/IR/invalid-builtin-attributes.mlir b/mlir/test/IR/invalid-builtin-attributes.mlir
--- a/mlir/test/IR/invalid-builtin-attributes.mlir
+++ b/mlir/test/IR/invalid-builtin-attributes.mlir
@@ -546,3 +546,44 @@
 
 // expected-error@below {{expected '>' to close an array attribute}}
 #attr = array<i8: 1)
+
+// -----
+
+// expected-error@below {{expected '[' after 'distinct'}}
+#attr = distinct<
+
+// -----
+
+// expected-error@below {{expected distinct Id}}
+#attr = distinct[i8
+
+// -----
+
+// expected-error@below {{expected an unsigned 64-bit integer}}
+#attr = distinct[0xAAAABBBBEEEEFFFF1]
+
+// -----
+
+// expected-error@below {{expected ']' to close distinct Id}}
+#attr = distinct[8)
+
+// -----
+
+// expected-error@below {{expected '<' after distinct Id}}
+#attr = distinct[8](
+
+// -----
+
+// expected-error@below {{expected attribute}}
+#attr = distinct[8]<attribute
+
+// -----
+
+// expected-error@below {{expected '>' to close distinct attribute}}
+#attr = distinct[8]<@foo]
+
+// -----
+
+#attr = distinct[0]<42 : i32>
+// expected-error@below {{referenced attribute does not match previous definition}}
+#attr1 = distinct[0]<43 : i32>
diff --git a/mlir/test/IR/test-builtin-distinct-attrs.mlir b/mlir/test/IR/test-builtin-distinct-attrs.mlir
new file mode 100644
--- /dev/null
+++ b/mlir/test/IR/test-builtin-distinct-attrs.mlir
@@ -0,0 +1,77 @@
+// RUN: mlir-opt -allow-unregistered-dialect %s -test-distinct-attrs | FileCheck %s
+
+// CHECK: #[[DIST0:.*]] = distinct[0]<42 : i32>
+// CHECK: #[[DIST1:.*]] = distinct[1]<42 : i32>
+#distinct = distinct[0]<42 : i32>
+// CHECK: #[[DIST2:.*]] = distinct[2]<42 : i32>
+// CHECK: #[[DIST3:.*]] = distinct[3]<42 : i32>
+#distinct1 = distinct[1]<42 : i32>
+// CHECK: #[[DIST4:.*]] = distinct[4]<43 : i32>
+// CHECK: #[[DIST5:.*]] = distinct[5]<43 : i32>
+#distinct2 = distinct[2]<43 : i32>
+// CHECK: #[[DIST6:.*]] = distinct[6]<@foo_1>
+// CHECK: #[[DIST7:.*]] = distinct[7]<@foo_1>
+#distinct3 = distinct[3]<@foo_1>
+
+// Copies made for foo_2
+// CHECK: #[[DIST8:.*]] = distinct[8]<42 : i32>
+// CHECK: #[[DIST9:.*]] = distinct[9]<42 : i32>
+// CHECK: #[[DIST10:.*]] = distinct[10]<43 : i32>
+// CHECK: #[[DIST11:.*]] = distinct[11]<@foo_1>
+
+// Copies made for foo_3
+// CHECK: #[[DIST12:.*]] = distinct[12]<42 : i32>
+// CHECK: #[[DIST13:.*]] = distinct[13]<42 : i32>
+// CHECK: #[[DIST14:.*]] = distinct[14]<43 : i32>
+// CHECK: #[[DIST15:.*]] = distinct[15]<@foo_1>
+
+// Copies made for foo_4
+// CHECK: #[[DIST16:.*]] = distinct[16]<42 : i32>
+// CHECK: #[[DIST17:.*]] = distinct[17]<42 : i32>
+// CHECK: #[[DIST18:.*]] = distinct[18]<43 : i32>
+// CHECK: #[[DIST19:.*]] = distinct[19]<@foo_1>
+
+// CHECK: @foo_1
+func.func @foo_1() {
+  // CHECK: "foo.op"() {distinct.input = #[[DIST0]], distinct.output = #[[DIST1]]}
+  "foo.op"() {distinct.input = #distinct} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST2]], distinct.output = #[[DIST3]]}
+  "foo.op"() {distinct.input = #distinct1} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST4]], distinct.output = #[[DIST5]]}
+  "foo.op"() {distinct.input = #distinct2} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST6]], distinct.output = #[[DIST7]]}
+  "foo.op"() {distinct.input = #distinct3} : () -> ()
+}
+
+func.func @foo_2() {
+  // CHECK: "foo.op"() {distinct.input = #[[DIST0]], distinct.output = #[[DIST8]]}
+  "foo.op"() {distinct.input = #distinct} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST2]], distinct.output = #[[DIST9]]}
+  "foo.op"() {distinct.input = #distinct1} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST4]], distinct.output = #[[DIST10]]}
+  "foo.op"() {distinct.input = #distinct2} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST6]], distinct.output = #[[DIST11]]}
+  "foo.op"() {distinct.input = #distinct3} : () -> ()
+}
+
+func.func @foo_3() {
+  // CHECK: "foo.op"() {distinct.input = #[[DIST0]], distinct.output = #[[DIST12]]}
+  "foo.op"() {distinct.input = #distinct} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST2]], distinct.output = #[[DIST13]]}
+  "foo.op"() {distinct.input = #distinct1} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST4]], distinct.output = #[[DIST14]]}
+  "foo.op"() {distinct.input = #distinct2} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST6]], distinct.output = #[[DIST15]]}
+  "foo.op"() {distinct.input = #distinct3} : () -> ()
+}
+
+func.func @foo_4() {
+  // CHECK: "foo.op"() {distinct.input = #[[DIST0]], distinct.output = #[[DIST16]]}
+  "foo.op"() {distinct.input = #distinct} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST2]], distinct.output = #[[DIST17]]}
+  "foo.op"() {distinct.input = #distinct1} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST4]], distinct.output = #[[DIST18]]}
+  "foo.op"() {distinct.input = #distinct2} : () -> ()
+  // CHECK: "foo.op"() {distinct.input = #[[DIST6]], distinct.output = #[[DIST19]]}
+  "foo.op"() {distinct.input = #distinct3} : () -> ()
+}
diff --git a/mlir/test/IR/test-symbol-rauw.mlir b/mlir/test/IR/test-symbol-rauw.mlir
--- a/mlir/test/IR/test-symbol-rauw.mlir
+++ b/mlir/test/IR/test-symbol-rauw.mlir
@@ -1,4 +1,4 @@
-// RUN: mlir-opt -allow-unregistered-dialect %s -test-symbol-rauw -split-input-file | FileCheck %s
+// RUN: mlir-opt -allow-unregistered-dialect -mlir-print-local-scope %s -test-symbol-rauw -split-input-file | FileCheck %s
 
 // Symbol references to the module itself don't affect uses of symbols within
 // its table.
@@ -85,11 +85,11 @@
     func.func @symbol_bar() {
       // CHECK: foo.op
       // CHECK-SAME: non_symbol_attr,
-      // CHECK-SAME: use = [#test.sub_elements_access<[@replaced_foo], @symbol_bar, @replaced_foo>],
+      // CHECK-SAME: use = [#test.sub_elements_access<[@replaced_foo], @symbol_bar, @replaced_foo>, distinct[0]<@replaced_foo>],
       // CHECK-SAME: z_non_symbol_attr_3
       "foo.op"() {
         non_symbol_attr,
-        use = [#test.sub_elements_access<[@symbol_foo],@symbol_bar,@symbol_foo>],
+        use = [#test.sub_elements_access<[@symbol_foo],@symbol_bar,@symbol_foo>, distinct[0]<@symbol_foo>],
         z_non_symbol_attr_3
       } : () -> ()
     }
diff --git a/mlir/test/IR/test-symbol-uses.mlir b/mlir/test/IR/test-symbol-uses.mlir
--- a/mlir/test/IR/test-symbol-uses.mlir
+++ b/mlir/test/IR/test-symbol-uses.mlir
@@ -4,19 +4,21 @@
 // its table.
 // expected-remark@below {{symbol_removable function successfully erased}}
 module attributes {sym.outside_use = @symbol_foo } {
-  // expected-remark@+1 {{symbol has 2 uses}}
+  // expected-remark@+1 {{symbol has 3 uses}}
   func.func private @symbol_foo()
 
   // expected-remark@below {{symbol has no uses}}
   // expected-remark@below {{found use of symbol : @symbol_foo}}
-  // expected-remark@below {{symbol contains 2 nested references}}
+  // expected-remark@below {{symbol contains 3 nested references}}
   func.func @symbol_bar() attributes {sym.use = @symbol_foo} {
     // expected-remark@+1 {{found use of symbol : @symbol_foo}}
     "foo.op"() {
       non_symbol_attr,
-      use = [{ nested_symbol = [@symbol_foo]}],
+      use = [{nested_symbol = [@symbol_foo]}],
       z_other_non_symbol_attr
     } : () -> ()
+    // expected-remark@+1 {{found use of symbol : @symbol_foo}}
+    "foo.op"() { use = distinct[0]<@symbol_foo> } : () -> ()
   }
 
   // expected-remark@below {{symbol has no uses}}
diff --git a/mlir/test/lib/IR/CMakeLists.txt b/mlir/test/lib/IR/CMakeLists.txt
--- a/mlir/test/lib/IR/CMakeLists.txt
+++ b/mlir/test/lib/IR/CMakeLists.txt
@@ -1,6 +1,7 @@
 # Exclude tests from libMLIR.so
 add_mlir_library(MLIRTestIR
   TestBuiltinAttributeInterfaces.cpp
+  TestBuiltinDistinctAttributes.cpp
   TestClone.cpp
   TestDiagnostics.cpp
   TestDominance.cpp
diff --git a/mlir/test/lib/IR/TestBuiltinDistinctAttributes.cpp b/mlir/test/lib/IR/TestBuiltinDistinctAttributes.cpp
new file mode 100644
--- /dev/null
+++ b/mlir/test/lib/IR/TestBuiltinDistinctAttributes.cpp
@@ -0,0 +1,49 @@
+//===- TestBuiltinDistinctAttributes.cpp - Test DistinctAttributes --------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "TestDialect.h"
+#include "mlir/IR/BuiltinAttributes.h"
+#include "mlir/Pass/Pass.h"
+
+using namespace mlir;
+
+namespace {
+/// This is a distinct attribute test pass that tests if distinct attributes can
+/// be created in parallel in a deterministic way.
+struct DistinctAttributesPass
+    : public PassWrapper<DistinctAttributesPass, OperationPass<func::FuncOp>> {
+  MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(DistinctAttributesPass)
+
+  StringRef getArgument() const final { return "test-distinct-attrs"; }
+  StringRef getDescription() const final {
+    return "Test parallel creation of distinct attributes";
+  }
+
+  void runOnOperation() override {
+    auto funcOp = getOperation();
+
+    /// Walk all operations and create a distinct output attribute given a
+    /// distinct input attribute.
+    funcOp->walk([](Operation *op) {
+      auto distinctAttr = op->getAttrOfType<DistinctAttr>("distinct.input");
+      if (!distinctAttr)
+        return;
+      op->setAttr("distinct.output",
+                  DistinctAttr::create(distinctAttr.getReferencedAttr()));
+    });
+  }
+};
+} // namespace
+
+namespace mlir {
+namespace test {
+void registerTestBuiltinDistinctAttributes() {
+  PassRegistration<DistinctAttributesPass>();
+}
+} // namespace test
+} // namespace mlir
diff --git a/mlir/tools/mlir-opt/mlir-opt.cpp b/mlir/tools/mlir-opt/mlir-opt.cpp
--- a/mlir/tools/mlir-opt/mlir-opt.cpp
+++ b/mlir/tools/mlir-opt/mlir-opt.cpp
@@ -73,6 +73,7 @@
 void registerTestArithEmulateWideIntPass();
 void registerTestAliasAnalysisPass();
 void registerTestBuiltinAttributeInterfaces();
+void registerTestBuiltinDistinctAttributes();
 void registerTestCallGraphPass();
 void registerTestCfAssertPass();
 void registerTestConstantFold();
@@ -187,6 +188,7 @@
   mlir::test::registerTestAliasAnalysisPass();
   mlir::test::registerTestArithEmulateWideIntPass();
   mlir::test::registerTestBuiltinAttributeInterfaces();
+  mlir::test::registerTestBuiltinDistinctAttributes();
   mlir::test::registerTestCallGraphPass();
   mlir::test::registerTestCfAssertPass();
   mlir::test::registerTestConstantFold();