diff --git a/mlir/include/mlir/IR/OpImplementation.h b/mlir/include/mlir/IR/OpImplementation.h
--- a/mlir/include/mlir/IR/OpImplementation.h
+++ b/mlir/include/mlir/IR/OpImplementation.h
@@ -589,6 +589,12 @@
   /// Parse a '|' token if present.
   virtual ParseResult parseOptionalVerticalBar() = 0;
 
+  /// Parse a '^' token.
+  virtual ParseResult parseCaret() = 0;
+
+  /// Parse a bare identifier.
+  virtual ParseResult parseBareIdentifier(std::string *string) = 0;
+
   /// Parse a quoted string token.
   ParseResult parseString(std::string *string) {
     auto loc = getCurrentLocation();
@@ -1479,9 +1485,9 @@
   //===--------------------------------------------------------------------===//
 
   struct Argument {
-    UnresolvedOperand ssaName;    // SourceLoc, SSA name, result #.
-    Type type;                    // Type.
-    DictionaryAttr attrs;         // Attributes if present.
+    UnresolvedOperand ssaName;         // SourceLoc, SSA name, result #.
+    Type type;                         // Type.
+    DictionaryAttr attrs;              // Attributes if present.
     std::optional<Location> sourceLoc; // Source location specifier if present.
   };
 
diff --git a/mlir/lib/AsmParser/AsmParserImpl.h b/mlir/lib/AsmParser/AsmParserImpl.h
--- a/mlir/lib/AsmParser/AsmParserImpl.h
+++ b/mlir/lib/AsmParser/AsmParserImpl.h
@@ -236,6 +236,22 @@
     return success(parser.consumeIf(Token::vertical_bar));
   }
 
+  /// Parse a '^' token.
+  ParseResult parseCaret() override {
+    return parser.parseToken(Token::caret, "expected '^'");
+  }
+
+  /// Parse a bare identifier
+  ParseResult parseBareIdentifier(std::string *string) override {
+    if (!parser.getToken().is(Token::bare_identifier))
+      return emitError(getCurrentLocation(), "expected bare identifier");
+
+    if (string)
+      *string = parser.getToken().getBareIdentifier();
+    parser.consumeToken();
+    return success();
+  }
+
   /// Parses a quoted string token if present.
   ParseResult parseOptionalString(std::string *string) override {
     if (!parser.getToken().is(Token::string))
diff --git a/mlir/lib/AsmParser/Token.h b/mlir/lib/AsmParser/Token.h
--- a/mlir/lib/AsmParser/Token.h
+++ b/mlir/lib/AsmParser/Token.h
@@ -115,6 +115,10 @@
   /// value.
   std::string getSymbolReference() const;
 
+  /// Given a token containing a bare identifier, return the unescaped string
+  /// value.
+  std::string getBareIdentifier() const;
+
   // Location processing.
   SMLoc getLoc() const;
   SMLoc getEndLoc() const;
diff --git a/mlir/lib/AsmParser/Token.cpp b/mlir/lib/AsmParser/Token.cpp
--- a/mlir/lib/AsmParser/Token.cpp
+++ b/mlir/lib/AsmParser/Token.cpp
@@ -155,6 +155,13 @@
   return std::string(nameStr);
 }
 
+/// Given a token containing a bare identifier, return the unescaped string
+/// value.
+std::string Token::getBareIdentifier() const {
+  assert(is(Token::bare_identifier) && "expected bare identifier");
+  return std::string(getSpelling());
+}
+
 /// Given a hash_identifier token like #123, try to parse the number out of
 /// the identifier, returning std::nullopt if it is a named identifier like #x
 /// or if the integer doesn't fit.
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
@@ -72,6 +72,7 @@
 TOK_PUNCTUATION(r_square, "]")
 TOK_PUNCTUATION(star, "*")
 TOK_PUNCTUATION(vertical_bar, "|")
+TOK_PUNCTUATION(caret, "^")
 
 TOK_PUNCTUATION(file_metadata_begin, "{-#")
 TOK_PUNCTUATION(file_metadata_end, "#-}")
diff --git a/mlir/test/IR/parser.mlir b/mlir/test/IR/parser.mlir
--- a/mlir/test/IR/parser.mlir
+++ b/mlir/test/IR/parser.mlir
@@ -1195,6 +1195,13 @@
   return
 }
 
+// GENERIC-LABEL: parse_bare_id
+func.func @parse_bare_id_test() {
+  // CHECK: test.parse_bare_id<foo>
+  test.parse_bare_id<foo>
+  return
+}
+
 // CHECK-LABEL: func @"\22_string_symbol_reference\22"
 func.func @"\"_string_symbol_reference\""() {
   // CHECK: ref = @"\22_string_symbol_reference\22"
diff --git a/mlir/test/lib/Dialect/Test/TestDialect.cpp b/mlir/test/lib/Dialect/Test/TestDialect.cpp
--- a/mlir/test/lib/Dialect/Test/TestDialect.cpp
+++ b/mlir/test/lib/Dialect/Test/TestDialect.cpp
@@ -1108,6 +1108,22 @@
   p << " \"" << llvm::encodeBase64(getB64()) << "\"";
 }
 
+ParseResult ParseBareIdOp::parse(OpAsmParser &parser, OperationState &result) {
+  if (parser.parseLess())
+    return failure();
+
+  std::string identifier;
+  if (parser.parseBareIdentifier(&identifier))
+    return failure();
+  if (parser.parseGreater())
+    return failure();
+
+  result.addAttribute("id", parser.getBuilder().getStringAttr(identifier));
+  return success();
+}
+
+void ParseBareIdOp::print(OpAsmPrinter &p) { p << "<" << getId() << ">"; }
+
 //===----------------------------------------------------------------------===//
 // Test WrapRegionOp - wrapping op exercising `parseGenericOperation()`.
 
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
@@ -785,7 +785,7 @@
   let results = (outs AnyTensor);
 }
 
-def OpWithShapedTypeInferTypeAdaptorInterfaceOp : 
+def OpWithShapedTypeInferTypeAdaptorInterfaceOp :
       TEST_Op<"op_with_shaped_type_infer_type_adaptor_if",
               [InferTensorTypeAdaptorWithReify]> {
   let arguments = (ins AnyTensor:$operand1, AnyTensor:$operand2);
@@ -1949,6 +1949,11 @@
   let hasCustomAssemblyFormat = 1;
 }
 
+def ParseBareIdOp : TEST_Op<"parse_bare_id"> {
+  let arguments = (ins StrAttr:$id);
+  let hasCustomAssemblyFormat = 1;
+}
+
 //===----------------------------------------------------------------------===//
 // Test region argument list parsing.
 
@@ -3470,7 +3475,7 @@
 def TestStoreWithARegion : TEST_Op<"store_with_a_region",
     [DeclareOpInterfaceMethods<RegionBranchOpInterface>,
      SingleBlock]> {
-  let arguments = (ins 
+  let arguments = (ins
     Arg<AnyMemRef, "", [MemWrite]>:$address,
     BoolAttr:$store_before_region
   );
diff --git a/mlir/unittests/Parser/ParserTest.cpp b/mlir/unittests/Parser/ParserTest.cpp
--- a/mlir/unittests/Parser/ParserTest.cpp
+++ b/mlir/unittests/Parser/ParserTest.cpp
@@ -101,4 +101,5 @@
     EXPECT_EQ(attr, b.getI64IntegerAttr(9));
   }
 }
+
 } // namespace