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
@@ -593,6 +593,9 @@
   /// Parse a `]` token if present.
   virtual ParseResult parseOptionalRSquare() = 0;
 
+  /// Parse a `...` token.
+  virtual ParseResult parseEllipsis() = 0;
+
   /// Parse a `...` token if present;
   virtual ParseResult parseOptionalEllipsis() = 0;
 
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
@@ -114,6 +114,11 @@
     return success(parser.consumeIf(Token::comma));
   }
 
+  /// Parses a `...`.
+  ParseResult parseEllipsis() override {
+    return parser.parseToken(Token::ellipsis, "expected '...'");
+  }
+
   /// Parses a `...` if present.
   ParseResult parseOptionalEllipsis() override {
     return success(parser.consumeIf(Token::ellipsis));
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
@@ -797,6 +797,13 @@
   }];
 }
 
+def TestEllipsisOp : TEST_Op<"ellipsis"> {
+  let arguments = (ins Variadic<AnyType>:$operands, UnitAttr:$variadic);
+  let assemblyFormat = [{
+    `(` $operands (`...` $variadic^)? `)` attr-dict `:` type($operands) `...`
+  }];
+}
+
 // This is used to test encoding of a string attribute into an SSA name of a
 // pretty printed value name.
 def StringAttrPrettyNameOp
diff --git a/mlir/test/mlir-tblgen/op-format.mlir b/mlir/test/mlir-tblgen/op-format.mlir
--- a/mlir/test/mlir-tblgen/op-format.mlir
+++ b/mlir/test/mlir-tblgen/op-format.mlir
@@ -392,6 +392,12 @@
 // CHECK: test.format_literal_following_optional_group(5 : i32) : i32 {a}
 test.format_literal_following_optional_group(5 : i32) : i32 {a}
 
+func.func @variadic(%a: i32) {
+  // CHECK: test.ellipsis(%{{.*}} ...) : i32 ...
+  test.ellipsis(%a ...) : i32 ...
+  return
+}
+
 //===----------------------------------------------------------------------===//
 // Format trait type inference
 //===----------------------------------------------------------------------===//
diff --git a/mlir/tools/mlir-tblgen/AttrOrTypeFormatGen.cpp b/mlir/tools/mlir-tblgen/AttrOrTypeFormatGen.cpp
--- a/mlir/tools/mlir-tblgen/AttrOrTypeFormatGen.cpp
+++ b/mlir/tools/mlir-tblgen/AttrOrTypeFormatGen.cpp
@@ -395,6 +395,7 @@
               .Case("?", "Question")
               .Case("+", "Plus")
               .Case("*", "Star")
+              .Case("...", "Ellipsis")
        << "()";
   }
   if (isOptional) {
diff --git a/mlir/tools/mlir-tblgen/FormatGen.cpp b/mlir/tools/mlir-tblgen/FormatGen.cpp
--- a/mlir/tools/mlir-tblgen/FormatGen.cpp
+++ b/mlir/tools/mlir-tblgen/FormatGen.cpp
@@ -473,6 +473,8 @@
   // Check the punctuation that are larger than a single character.
   if (value == "->")
     return true;
+  if (value == "...")
+    return true;
 
   // Otherwise, this must be an identifier.
   return canFormatStringAsKeyword(value, emitError);
diff --git a/mlir/tools/mlir-tblgen/OpFormatGen.cpp b/mlir/tools/mlir-tblgen/OpFormatGen.cpp
--- a/mlir/tools/mlir-tblgen/OpFormatGen.cpp
+++ b/mlir/tools/mlir-tblgen/OpFormatGen.cpp
@@ -760,7 +760,8 @@
               .Case("]", "RSquare()")
               .Case("?", "Question()")
               .Case("+", "Plus()")
-              .Case("*", "Star()");
+              .Case("*", "Star()")
+              .Case("...", "Ellipsis()");
 }
 
 /// Generate the storage code required for parsing the given element.