diff --git a/mlir/include/mlir/TableGen/OpClass.h b/mlir/include/mlir/TableGen/OpClass.h
--- a/mlir/include/mlir/TableGen/OpClass.h
+++ b/mlir/include/mlir/TableGen/OpClass.h
@@ -24,35 +24,190 @@
 #define MLIR_TABLEGEN_OPCLASS_H_
 
 #include "mlir/Support/LLVM.h"
+#include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSet.h"
+#include "llvm/Support/raw_ostream.h"
 
+#include <set>
 #include <string>
 
 namespace mlir {
 namespace tblgen {
 class FmtObjectBase;
 
+// Class for holding a single parameter of an op's method for C++ code emission.
+class OpMethodParameter {
+public:
+  // Properties (qualifiers) for the parameter.
+  enum Property {
+    PP_None = 0x0,
+    PP_Optional = 0x1,
+  };
+
+  OpMethodParameter(StringRef type, StringRef name, StringRef defaultValue = "",
+                    Property properties = PP_None)
+      : type(type), name(name), defaultValue(defaultValue),
+        properties(properties) {}
+
+  OpMethodParameter(StringRef type, StringRef name, Property property)
+      : OpMethodParameter(type, name, "", property) {}
+
+  // Writes the parameter as a part of a method declaration to `os`.
+  void writeDeclTo(raw_ostream &os) const { writeTo(os, /*emitDefault=*/true); }
+
+  // Writes the parameter as a part of a method definition to `os`
+  void writeDefTo(raw_ostream &os) const { writeTo(os, /*emitDefault=*/false); }
+
+  const std::string &getType() const { return type; }
+  bool hasDefaultValue() const { return !defaultValue.empty(); }
+
+private:
+  void writeTo(raw_ostream &os, bool emitDefault) const;
+
+  std::string type;
+  std::string name;
+  std::string defaultValue;
+  Property properties;
+};
+
+// Base class for holding parameters of an op's method for C++ code emission.
+class OpMethodParameters {
+public:
+  // Discriminator for LLVM-style RTTI.
+  enum ParamsKind {
+    // Separate type and name for each parameter is not known.
+    PK_Unresolved,
+    // Each parameter is resolved to a type and name.
+    PK_Resolved,
+  };
+
+  OpMethodParameters(ParamsKind kind) : kind(kind) {}
+  virtual ~OpMethodParameters() {}
+
+  // LLVM-style RTTI support.
+  ParamsKind getKind() const { return kind; }
+
+  // Writes the parameters as a part of a method declaration to `os`.
+  virtual void writeDeclTo(raw_ostream &os) const = 0;
+
+  // Writes the parameters as a part of a method definition to `os`
+  virtual void writeDefTo(raw_ostream &os) const = 0;
+
+  // Factory methods to create the correct type of `OpMethodParameters`
+  // object based on the arguments.
+  static std::unique_ptr<OpMethodParameters> create();
+
+  static std::unique_ptr<OpMethodParameters> create(StringRef params);
+
+  static std::unique_ptr<OpMethodParameters>
+  create(llvm::SmallVectorImpl<OpMethodParameter> &&params);
+
+  static std::unique_ptr<OpMethodParameters>
+  create(StringRef type, StringRef name, StringRef defaultValue = "");
+
+private:
+  const ParamsKind kind;
+};
+
+// Class for holding unresolved parameters.
+class OpMethodUnresolvedParameters : public OpMethodParameters {
+public:
+  OpMethodUnresolvedParameters(StringRef params)
+      : OpMethodParameters(PK_Unresolved), parameters(params) {}
+
+  // write the parameters as a part of a method declaration to the given `os`.
+  void writeDeclTo(raw_ostream &os) const override;
+
+  // write the parameters as a part of a method definition to the given `os`
+  void writeDefTo(raw_ostream &os) const override;
+
+  // LLVM-style RTTI support.
+  static bool classof(const OpMethodParameters *params) {
+    return params->getKind() == PK_Unresolved;
+  }
+
+private:
+  std::string parameters;
+};
+
+// Class for holding resolved parameters.
+class OpMethodResolvedParameters : public OpMethodParameters {
+public:
+  OpMethodResolvedParameters() : OpMethodParameters(PK_Resolved) {}
+
+  OpMethodResolvedParameters(llvm::SmallVectorImpl<OpMethodParameter> &&params)
+      : OpMethodParameters(PK_Resolved) {
+    for (OpMethodParameter &param : params)
+      parameters.emplace_back(std::move(param));
+  }
+
+  OpMethodResolvedParameters(StringRef type, StringRef name,
+                             StringRef defaultValue)
+      : OpMethodParameters(PK_Resolved) {
+    parameters.emplace_back(type, name, defaultValue);
+  }
+
+  // Returns the number of parameters.
+  size_t getNumParameters() const { return parameters.size(); }
+
+  // Returns if this method makes the `other` method redundant. Note that this
+  // is more than just finding conflicting methods. This method determines if
+  // the 2 set of parameters are conflicting and if so, returns true if this
+  // method has a more general set of parameters that can replace all possible
+  // calls to the `other` method.
+  bool makesRedundant(const OpMethodResolvedParameters &other) const;
+
+  // write the parameters as a part of a method declaration to the given `os`.
+  void writeDeclTo(raw_ostream &os) const override;
+
+  // write the parameters as a part of a method definition to the given `os`
+  void writeDefTo(raw_ostream &os) const override;
+
+  // LLVM-style RTTI support.
+  static bool classof(const OpMethodParameters *params) {
+    return params->getKind() == PK_Resolved;
+  }
+
+private:
+  llvm::SmallVector<OpMethodParameter, 4> parameters;
+};
+
 // Class for holding the signature of an op's method for C++ code emission
 class OpMethodSignature {
 public:
-  OpMethodSignature(StringRef retType, StringRef name, StringRef params);
+  template <typename... Args>
+  OpMethodSignature(StringRef retType, StringRef name, Args &&...args)
+      : returnType(retType), methodName(name),
+        parameters(OpMethodParameters::create(std::forward<Args>(args)...)) {}
+  OpMethodSignature(OpMethodSignature &&) = default;
+
+  // Returns if a method with this signature makes a method with `other`
+  // signature redundant. Only supports resolved parameters.
+  bool makesRedundant(const OpMethodSignature &other) const;
+
+  // Returns the number of parameters (for resolved parameters).
+  size_t getNumParameters() const {
+    return cast<OpMethodResolvedParameters>(parameters.get())
+        ->getNumParameters();
+  }
+
+  // Returns the name of the method.
+  StringRef getName() const { return methodName; }
 
   // Writes the signature as a method declaration to the given `os`.
   void writeDeclTo(raw_ostream &os) const;
+
   // Writes the signature as the start of a method definition to the given `os`.
   // `namePrefix` is the prefix to be prepended to the method name (typically
   // namespaces for qualifying the method definition).
   void writeDefTo(raw_ostream &os, StringRef namePrefix) const;
 
 private:
-  // Returns true if the given C++ `type` ends with '&' or '*', or is empty.
-  static bool elideSpaceAfterType(StringRef type);
-
   std::string returnType;
   std::string methodName;
-  std::string parameters;
+  std::unique_ptr<OpMethodParameters> parameters;
 };
 
 // Class for holding the body of an op's method for C++ code emission
@@ -79,13 +234,22 @@
   // querying properties.
   enum Property {
     MP_None = 0x0,
-    MP_Static = 0x1,      // Static method
-    MP_Constructor = 0x2, // Constructor
-    MP_Private = 0x4,     // Private method
+    MP_Static = 0x1,
+    MP_Constructor = 0x2,
+    MP_Private = 0x4,
+    MP_Declaration = 0x8,
+    MP_StaticDeclaration = MP_Static | MP_Declaration,
   };
 
-  OpMethod(StringRef retType, StringRef name, StringRef params,
-           Property property, bool declOnly);
+  template <typename... Args>
+  OpMethod(StringRef retType, StringRef name, Property property, unsigned id,
+           Args &&...args)
+      : properties(property),
+        methodSignature(retType, name, std::forward<Args>(args)...),
+        methodBody(properties & MP_Declaration), id(id) {}
+
+  OpMethod(OpMethod &&) = default;
+
   virtual ~OpMethod() = default;
 
   OpMethodBody &body() { return methodBody; }
@@ -96,8 +260,20 @@
   // Returns true if this is a private method.
   bool isPrivate() const { return properties & MP_Private; }
 
+  // Returns the name of this method.
+  StringRef getName() const { return methodSignature.getName(); }
+
+  // Returns the ID for this method
+  unsigned getID() const { return id; }
+
+  // Returns if this method makes the `other` method redundant.
+  bool makesRedundant(const OpMethod &other) const {
+    return methodSignature.makesRedundant(other.methodSignature);
+  }
+
   // Writes the method as a declaration to the given `os`.
   virtual void writeDeclTo(raw_ostream &os) const;
+
   // Writes the method as a definition to the given `os`. `namePrefix` is the
   // prefix to be prepended to the method name (typically namespaces for
   // qualifying the method definition).
@@ -105,18 +281,18 @@
 
 protected:
   Property properties;
-  // Whether this method only contains a declaration.
-  bool isDeclOnly;
   OpMethodSignature methodSignature;
   OpMethodBody methodBody;
+  const unsigned id;
 };
 
 // Class for holding an op's constructor method for C++ code emission.
 class OpConstructor : public OpMethod {
 public:
-  OpConstructor(StringRef retType, StringRef name, StringRef params,
-                Property property, bool declOnly)
-      : OpMethod(retType, name, params, property, declOnly){};
+  template <typename... Args>
+  OpConstructor(StringRef className, Property property, unsigned id,
+                Args &&...args)
+      : OpMethod("", className, property, id, std::forward<Args>(args)...){};
 
   // Add member initializer to constructor initializing `name` with `value`.
   void addMemberInitializer(StringRef name, StringRef value);
@@ -137,12 +313,33 @@
 public:
   explicit Class(StringRef name);
 
-  // Creates a new method in this class.
-  OpMethod &newMethod(StringRef retType, StringRef name, StringRef params = "",
-                      OpMethod::Property = OpMethod::MP_None,
-                      bool declOnly = false);
-
-  OpConstructor &newConstructor(StringRef params = "", bool declOnly = false);
+  // Adds a new method to this class and prune redundant methods. Returns null
+  // if the method was not added (because an existing method would make it
+  // redundant), else returns a pointer to the added method. Note that this call
+  // may also delete existing methods that are made redundant by a method to the
+  // class.
+  template <typename... Args>
+  OpMethod *addMethodAndPrune(StringRef retType, StringRef name,
+                              OpMethod::Property properties, Args &&...args) {
+    auto newMethod = std::make_unique<OpMethod>(
+        retType, name, properties, nextMethodID++, std::forward<Args>(args)...);
+    return addMethodAndPrune(methods, std::move(newMethod));
+  }
+
+  template <typename... Args>
+  OpMethod *addMethodAndPrune(StringRef retType, StringRef name,
+                              Args &&...args) {
+    return addMethodAndPrune(retType, name, OpMethod::MP_None,
+                             std::forward<Args>(args)...);
+  }
+
+  template <typename... Args>
+  OpConstructor *addConstructorAndPrune(Args &&...args) {
+    auto newConstructor = std::make_unique<OpConstructor>(
+        getClassName(), OpMethod::MP_Constructor, nextMethodID++,
+        std::forward<Args>(args)...);
+    return addMethodAndPrune(constructors, std::move(newConstructor));
+  }
 
   // Creates a new field in this class.
   void newField(StringRef type, StringRef name, StringRef defaultValue = "");
@@ -156,9 +353,63 @@
   StringRef getClassName() const { return className; }
 
 protected:
+  // Get a list of all the methods to emit, filtering out hidden ones.
+  void forAllMethods(llvm::function_ref<void(const OpMethod &)> func) const {
+    using ConsRef = const std::unique_ptr<OpConstructor> &;
+    using MethodRef = const std::unique_ptr<OpMethod> &;
+    llvm::for_each(constructors, [&](ConsRef ptr) { func(*ptr); });
+    llvm::for_each(methods, [&](MethodRef ptr) { func(*ptr); });
+  }
+
+  // For deterministic code generation, keep methods sorted in the order in
+  // which they were generated.
+  template <typename MethodTy>
+  struct MethodCompare {
+    bool operator()(const std::unique_ptr<MethodTy> &x,
+                    const std::unique_ptr<MethodTy> &y) {
+      return x->getID() < y->getID();
+    }
+  };
+
+  template <typename MethodTy>
+  using MethodSet =
+      std::set<std::unique_ptr<MethodTy>, MethodCompare<MethodTy>>;
+
+  template <typename MethodTy>
+  MethodTy *addMethodAndPrune(MethodSet<MethodTy> &set,
+                              std::unique_ptr<MethodTy> &&newMethod) {
+    // Check if the new method will be made redundant by existing methods.
+    for (auto &method : set)
+      if (method->makesRedundant(*newMethod))
+        return nullptr;
+
+    // We can add this a method to the set. Prune any existing methods that will
+    // be made redundant by adding this new method. Note that the redundant
+    // check between two methods is more than a conflict check. makesRedundant()
+    // below will check if the new method conflicts with an existing method and
+    // if so, returns true if the new method makes the existing method redundant
+    // because all calls to the existing method can be subsumed by the new
+    // method. So makesRedundant() does a combined job of finding conflicts and
+    // deciding which of the 2 conflicting methods survive.
+    //
+    // Note: llvm::erase_if does not work with sets of std::unique_ptr, so doing
+    // it manually here.
+    for (auto it = set.begin(), end = set.end(); it != end;) {
+      if (newMethod->makesRedundant(*(it->get())))
+        it = set.erase(it);
+      else
+        ++it;
+    }
+
+    MethodTy *ret = newMethod.get();
+    set.insert(std::move(newMethod));
+    return ret;
+  }
+
   std::string className;
-  SmallVector<OpConstructor, 2> constructors;
-  SmallVector<OpMethod, 8> methods;
+  MethodSet<OpConstructor> constructors;
+  MethodSet<OpMethod> methods;
+  unsigned nextMethodID = 0;
   SmallVector<std::string, 4> fields;
 };
 
diff --git a/mlir/lib/TableGen/OpClass.cpp b/mlir/lib/TableGen/OpClass.cpp
--- a/mlir/lib/TableGen/OpClass.cpp
+++ b/mlir/lib/TableGen/OpClass.cpp
@@ -9,50 +9,157 @@
 #include "mlir/TableGen/OpClass.h"
 
 #include "mlir/TableGen/Format.h"
+#include "llvm/ADT/Sequence.h"
 #include "llvm/ADT/Twine.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
+#include <unordered_set>
+
+#define DEBUG_TYPE "mlir-tblgen-opclass"
 
 using namespace mlir;
 using namespace mlir::tblgen;
 
+namespace {
+
+// Returns space to be emitted after the given C++ `type`. return "" if the
+// ends with '&' or '*', or is empty, else returns " ".
+StringRef getSpaceAfterType(StringRef type) {
+  return (type.empty() || type.endswith("&") || type.endswith("*")) ? "" : " ";
+}
+
+} // namespace
+
 //===----------------------------------------------------------------------===//
-// OpMethodSignature definitions
+// OpMethodParameter definitions
 //===----------------------------------------------------------------------===//
 
-OpMethodSignature::OpMethodSignature(StringRef retType, StringRef name,
-                                     StringRef params)
-    : returnType(retType), methodName(name), parameters(params) {}
+void OpMethodParameter::writeTo(raw_ostream &os, bool emitDefault) const {
+  if (properties & PP_Optional)
+    os << "/*optional*/";
+  os << type << getSpaceAfterType(type) << name;
+  if (emitDefault && !defaultValue.empty())
+    os << " = " << defaultValue;
+}
 
-void OpMethodSignature::writeDeclTo(raw_ostream &os) const {
-  os << returnType << (elideSpaceAfterType(returnType) ? "" : " ") << methodName
-     << "(" << parameters << ")";
+//===----------------------------------------------------------------------===//
+// OpMethodParameters definitions
+//===----------------------------------------------------------------------===//
+
+// Factory methods to construct the correct type of `OpMethodParameters`
+// object based on the arguments.
+std::unique_ptr<OpMethodParameters> OpMethodParameters::create() {
+  return std::make_unique<OpMethodResolvedParameters>();
 }
 
-void OpMethodSignature::writeDefTo(raw_ostream &os,
-                                   StringRef namePrefix) const {
+std::unique_ptr<OpMethodParameters>
+OpMethodParameters::create(StringRef params) {
+  return std::make_unique<OpMethodUnresolvedParameters>(params);
+}
+
+std::unique_ptr<OpMethodParameters>
+OpMethodParameters::create(llvm::SmallVectorImpl<OpMethodParameter> &&params) {
+  return std::make_unique<OpMethodResolvedParameters>(std::move(params));
+}
+
+std::unique_ptr<OpMethodParameters>
+OpMethodParameters::create(StringRef type, StringRef name,
+                           StringRef defaultValue) {
+  return std::make_unique<OpMethodResolvedParameters>(type, name, defaultValue);
+}
+
+//===----------------------------------------------------------------------===//
+// OpMethodUnresolvedParameters definitions
+//===----------------------------------------------------------------------===//
+void OpMethodUnresolvedParameters::writeDeclTo(raw_ostream &os) const {
+  os << parameters;
+}
+
+void OpMethodUnresolvedParameters::writeDefTo(raw_ostream &os) const {
   // We need to remove the default values for parameters in method definition.
   // TODO: We are using '=' and ',' as delimiters for parameter
   // initializers. This is incorrect for initializer list with more than one
   // element. Change to a more robust approach.
-  auto removeParamDefaultValue = [](StringRef params) {
-    std::string result;
-    std::pair<StringRef, StringRef> parts;
-    while (!params.empty()) {
-      parts = params.split("=");
-      result.append(result.empty() ? "" : ", ");
-      result += parts.first;
-      params = parts.second.split(",").second;
-    }
-    return result;
-  };
+  llvm::SmallVector<StringRef, 4> tokens;
+  StringRef params = parameters;
+  while (!params.empty()) {
+    std::pair<StringRef, StringRef> parts = params.split("=");
+    tokens.push_back(parts.first);
+    params = parts.second.split(',').second;
+  }
+  llvm::interleaveComma(tokens, os, [&](StringRef token) { os << token; });
+}
+
+//===----------------------------------------------------------------------===//
+// OpMethodResolvedParameters definitions
+//===----------------------------------------------------------------------===//
 
-  os << returnType << (elideSpaceAfterType(returnType) ? "" : " ") << namePrefix
-     << (namePrefix.empty() ? "" : "::") << methodName << "("
-     << removeParamDefaultValue(parameters) << ")";
+// Returns true if a method with these parameters makes a method with parameters
+// `other` redundant. This should return true only if all possible calls to the
+// other method can be replaced by calls to this method.
+bool OpMethodResolvedParameters::makesRedundant(
+    const OpMethodResolvedParameters &other) const {
+  const size_t otherNumParams = other.getNumParameters();
+  const size_t thisNumParams = getNumParameters();
+
+  // All calls to the other method can be replaced this method only if this
+  // method has the same or more arguments number of arguments as the other, and
+  // the common arguments have the same type.
+  if (thisNumParams < otherNumParams)
+    return false;
+  for (int idx : llvm::seq<int>(0, otherNumParams))
+    if (parameters[idx].getType() != other.parameters[idx].getType())
+      return false;
+
+  // If all the common arguments have the same type, we can elide the other
+  // method if this method has the same number of arguments as other or the
+  // first argument after the common ones has a default value (and by C++
+  // requirement, all the later ones will also have a default value).
+  return thisNumParams == otherNumParams ||
+         parameters[otherNumParams].hasDefaultValue();
 }
 
-bool OpMethodSignature::elideSpaceAfterType(StringRef type) {
-  return type.empty() || type.endswith("&") || type.endswith("*");
+void OpMethodResolvedParameters::writeDeclTo(raw_ostream &os) const {
+  llvm::interleaveComma(parameters, os, [&](const OpMethodParameter &param) {
+    param.writeDeclTo(os);
+  });
+}
+
+void OpMethodResolvedParameters::writeDefTo(raw_ostream &os) const {
+  llvm::interleaveComma(parameters, os, [&](const OpMethodParameter &param) {
+    param.writeDefTo(os);
+  });
+}
+
+//===----------------------------------------------------------------------===//
+// OpMethodSignature definitions
+//===----------------------------------------------------------------------===//
+
+// Returns if a method with this signature makes a method with `other` signature
+// redundant. Only supports resolved parameters.
+bool OpMethodSignature::makesRedundant(const OpMethodSignature &other) const {
+  if (methodName != other.methodName)
+    return false;
+  auto *resolvedThis = dyn_cast<OpMethodResolvedParameters>(parameters.get());
+  auto *resolvedOther =
+      dyn_cast<OpMethodResolvedParameters>(other.parameters.get());
+  if (resolvedThis && resolvedOther)
+    return resolvedThis->makesRedundant(*resolvedOther);
+  return false;
+}
+
+void OpMethodSignature::writeDeclTo(raw_ostream &os) const {
+  os << returnType << getSpaceAfterType(returnType) << methodName << "(";
+  parameters->writeDeclTo(os);
+  os << ")";
+}
+
+void OpMethodSignature::writeDefTo(raw_ostream &os,
+                                   StringRef namePrefix) const {
+  os << returnType << getSpaceAfterType(returnType) << namePrefix
+     << (namePrefix.empty() ? "" : "::") << methodName << "(";
+  parameters->writeDefTo(os);
+  os << ")";
 }
 
 //===----------------------------------------------------------------------===//
@@ -90,10 +197,6 @@
 // OpMethod definitions
 //===----------------------------------------------------------------------===//
 
-OpMethod::OpMethod(StringRef retType, StringRef name, StringRef params,
-                   OpMethod::Property property, bool declOnly)
-    : properties(property), isDeclOnly(declOnly),
-      methodSignature(retType, name, params), methodBody(declOnly) {}
 void OpMethod::writeDeclTo(raw_ostream &os) const {
   os.indent(2);
   if (isStatic())
@@ -103,9 +206,9 @@
 }
 
 void OpMethod::writeDefTo(raw_ostream &os, StringRef namePrefix) const {
-  if (isDeclOnly)
+  // Do not write definition if the method is decl only.
+  if (properties & MP_Declaration)
     return;
-
   methodSignature.writeDefTo(os, namePrefix);
   os << " {\n";
   methodBody.writeTo(os);
@@ -122,7 +225,8 @@
 }
 
 void OpConstructor::writeDefTo(raw_ostream &os, StringRef namePrefix) const {
-  if (isDeclOnly)
+  // Do not write definition if the method is decl only.
+  if (properties & MP_Declaration)
     return;
 
   methodSignature.writeDefTo(os, namePrefix);
@@ -137,18 +241,6 @@
 
 Class::Class(StringRef name) : className(name) {}
 
-OpMethod &Class::newMethod(StringRef retType, StringRef name, StringRef params,
-                           OpMethod::Property property, bool declOnly) {
-  methods.emplace_back(retType, name, params, property, declOnly);
-  return methods.back();
-}
-
-OpConstructor &Class::newConstructor(StringRef params, bool declOnly) {
-  constructors.emplace_back("", getClassName(), params,
-                            OpMethod::MP_Constructor, declOnly);
-  return constructors.back();
-}
-
 void Class::newField(StringRef type, StringRef name, StringRef defaultValue) {
   std::string varName = formatv("{0} {1}", type, name).str();
   std::string field = defaultValue.empty()
@@ -156,43 +248,42 @@
                           : formatv("{0} = {1}", varName, defaultValue).str();
   fields.push_back(std::move(field));
 }
-
 void Class::writeDeclTo(raw_ostream &os) const {
   bool hasPrivateMethod = false;
   os << "class " << className << " {\n";
   os << "public:\n";
-  for (const auto &method :
-       llvm::concat<const OpMethod>(constructors, methods)) {
+
+  forAllMethods([&](const OpMethod &method) {
     if (!method.isPrivate()) {
       method.writeDeclTo(os);
       os << '\n';
     } else {
       hasPrivateMethod = true;
     }
-  }
+  });
+
   os << '\n';
   os << "private:\n";
   if (hasPrivateMethod) {
-    for (const auto &method :
-         llvm::concat<const OpMethod>(constructors, methods)) {
+    forAllMethods([&](const OpMethod &method) {
       if (method.isPrivate()) {
         method.writeDeclTo(os);
         os << '\n';
       }
-    }
+    });
     os << '\n';
   }
+
   for (const auto &field : fields)
     os.indent(2) << field << ";\n";
   os << "};\n";
 }
 
 void Class::writeDefTo(raw_ostream &os) const {
-  for (const auto &method :
-       llvm::concat<const OpMethod>(constructors, methods)) {
+  forAllMethods([&](const OpMethod &method) {
     method.writeDefTo(os, className);
     os << "\n\n";
-  }
+  });
 }
 
 //===----------------------------------------------------------------------===//
@@ -217,14 +308,14 @@
   os << "  using Adaptor = " << className << "Adaptor;\n";
 
   bool hasPrivateMethod = false;
-  for (const auto &method : methods) {
+  forAllMethods([&](const OpMethod &method) {
     if (!method.isPrivate()) {
       method.writeDeclTo(os);
       os << "\n";
     } else {
       hasPrivateMethod = true;
     }
-  }
+  });
 
   // TODO: Add line control markers to make errors easier to debug.
   if (!extraClassDeclaration.empty())
@@ -232,12 +323,12 @@
 
   if (hasPrivateMethod) {
     os << "\nprivate:\n";
-    for (const auto &method : methods) {
+    forAllMethods([&](const OpMethod &method) {
       if (method.isPrivate()) {
         method.writeDeclTo(os);
         os << "\n";
       }
-    }
+    });
   }
 
   os << "};\n";
diff --git a/mlir/test/mlir-tblgen/op-attribute.td b/mlir/test/mlir-tblgen/op-attribute.td
--- a/mlir/test/mlir-tblgen/op-attribute.td
+++ b/mlir/test/mlir-tblgen/op-attribute.td
@@ -107,7 +107,7 @@
     StrAttr:$str_attr,
     ElementsAttr:$elements_attr,
     FlatSymbolRefAttr:$function_attr,
-    SomeTypeAttr:$type_attr,
+    SomeTypeAttr:$some_type_attr,
     ArrayAttr:$array_attr,
     TypedArrayAttrBase<SomeAttr, "SomeAttr array">:$some_attr_array,
     TypeAttr:$type_attr
@@ -128,7 +128,7 @@
 // DEF: if (!((tblgen_str_attr.isa<::mlir::StringAttr>())))
 // DEF: if (!((tblgen_elements_attr.isa<::mlir::ElementsAttr>())))
 // DEF: if (!((tblgen_function_attr.isa<::mlir::FlatSymbolRefAttr>())))
-// DEF: if (!(((tblgen_type_attr.isa<::mlir::TypeAttr>())) && ((tblgen_type_attr.cast<::mlir::TypeAttr>().getValue().isa<SomeType>()))))
+// DEF: if (!(((tblgen_some_type_attr.isa<::mlir::TypeAttr>())) && ((tblgen_some_type_attr.cast<::mlir::TypeAttr>().getValue().isa<SomeType>()))))
 // DEF: if (!((tblgen_array_attr.isa<::mlir::ArrayAttr>())))
 // DEF: if (!(((tblgen_some_attr_array.isa<::mlir::ArrayAttr>())) && (::llvm::all_of(tblgen_some_attr_array.cast<::mlir::ArrayAttr>(), [](::mlir::Attribute attr) { return (some-condition); }))))
 // DEF: if (!(((tblgen_type_attr.isa<::mlir::TypeAttr>())) && ((tblgen_type_attr.cast<::mlir::TypeAttr>().getValue().isa<::mlir::Type>()))))
@@ -145,7 +145,7 @@
 // DEF: ::llvm::StringRef BOp::str_attr()
 // DEF: ::mlir::ElementsAttr BOp::elements_attr()
 // DEF: ::llvm::StringRef BOp::function_attr()
-// DEF: SomeType BOp::type_attr()
+// DEF: SomeType BOp::some_type_attr()
 // DEF: ::mlir::ArrayAttr BOp::array_attr()
 // DEF: ::mlir::ArrayAttr BOp::some_attr_array()
 // DEF: ::mlir::Type BOp::type_attr()
diff --git a/mlir/test/mlir-tblgen/op-result.td b/mlir/test/mlir-tblgen/op-result.td
--- a/mlir/test/mlir-tblgen/op-result.td
+++ b/mlir/test/mlir-tblgen/op-result.td
@@ -110,7 +110,7 @@
   let results = (outs AnyTensor:$result);
 }
 
-// CHECK-LABEL: OpK::build(::mlir::OpBuilder &odsBuilder, ::mlir::OperationState &odsState, ::mlir::ValueRange operands, ::llvm::ArrayRef<::mlir::NamedAttribute> attributes )
+// CHECK-LABEL: OpK::build(::mlir::OpBuilder &odsBuilder, ::mlir::OperationState &odsState, ::mlir::ValueRange operands, ::llvm::ArrayRef<::mlir::NamedAttribute> attributes)
 // CHECK: odsState.addTypes({operands[0].getType()});
 
 // Test with inferred shapes and interleaved with operands/attributes.
diff --git a/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp b/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp
--- a/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp
+++ b/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp
@@ -232,10 +232,6 @@
   // operand's type as all results' types.
   void genUseOperandAsResultTypeCollectiveParamBuilder();
 
-  // Returns true if the inferred collective param build method should be
-  // generated.
-  bool shouldGenerateInferredTypeCollectiveParamBuilder();
-
   // Generates the build() method that takes aggregate operands/attributes
   // parameters. This build() method uses inferred types as result types.
   // Requires: The type needs to be inferable via InferTypeOpInterface.
@@ -268,7 +264,7 @@
   // `resultTypeNames` with the names for parameters for specifying result
   // types. The given `typeParamKind` and `attrParamKind` controls how result
   // types and attributes are placed in the parameter list.
-  void buildParamList(std::string &paramList,
+  void buildParamList(llvm::SmallVectorImpl<OpMethodParameter> &paramList,
                       SmallVectorImpl<std::string> &resultTypeNames,
                       TypeParamKind typeParamKind,
                       AttrParamKind attrParamKind = AttrParamKind::WrappedAttr);
@@ -496,15 +492,19 @@
 
   // Emit the derived attribute body.
   auto emitDerivedAttr = [&](StringRef name, Attribute attr) {
-    auto &method = opClass.newMethod(attr.getReturnType(), name);
-    auto &body = method.body();
+    auto *method = opClass.addMethodAndPrune(attr.getReturnType(), name);
+    if (!method)
+      return;
+    auto &body = method->body();
     body << "  " << attr.getDerivedCodeBody() << "\n";
   };
 
   // Emit with return type specified.
   auto emitAttrWithReturnType = [&](StringRef name, Attribute attr) {
-    auto &method = opClass.newMethod(attr.getReturnType(), name);
-    auto &body = method.body();
+    auto *method = opClass.addMethodAndPrune(attr.getReturnType(), name);
+    if (!method)
+      return;
+    auto &body = method->body();
     body << "  auto attr = " << name << "Attr();\n";
     if (attr.hasDefaultValue()) {
       // Returns the default value if not set.
@@ -526,9 +526,11 @@
   // referring to the attributes via accessors instead of having to use
   // the string interface for better compile time verification.
   auto emitAttrWithStorageType = [&](StringRef name, Attribute attr) {
-    auto &method =
-        opClass.newMethod(attr.getStorageType(), (name + "Attr").str());
-    auto &body = method.body();
+    auto *method =
+        opClass.addMethodAndPrune(attr.getStorageType(), (name + "Attr").str());
+    if (!method)
+      return;
+    auto &body = method->body();
     body << "  return this->getAttr(\"" << name << "\").";
     if (attr.isOptional() || attr.hasDefaultValue())
       body << "dyn_cast_or_null<";
@@ -558,19 +560,19 @@
     // attribute. This enables, for example, avoiding adding an attribute that
     // overlaps with a derived attribute.
     {
-      auto &method =
-          opClass.newMethod("bool", "isDerivedAttribute",
-                            "::llvm::StringRef name", OpMethod::MP_Static);
-      auto &body = method.body();
+      auto *method = opClass.addMethodAndPrune("bool", "isDerivedAttribute",
+                                               OpMethod::MP_Static,
+                                               "::llvm::StringRef", "name");
+      auto &body = method->body();
       for (auto namedAttr : derivedAttrs)
         body << "  if (name == \"" << namedAttr.name << "\") return true;\n";
       body << " return false;";
     }
     // Generate method to materialize derived attributes as a DictionaryAttr.
     {
-      OpMethod &method = opClass.newMethod("::mlir::DictionaryAttr",
-                                           "materializeDerivedAttributes");
-      auto &body = method.body();
+      auto *method = opClass.addMethodAndPrune("::mlir::DictionaryAttr",
+                                               "materializeDerivedAttributes");
+      auto &body = method->body();
 
       auto nonMaterializable =
           make_filter_range(derivedAttrs, [](const NamedAttribute &namedAttr) {
@@ -618,9 +620,11 @@
   // to the attributes via setters instead of having to use the string interface
   // for better compile time verification.
   auto emitAttrWithStorageType = [&](StringRef name, Attribute attr) {
-    auto &method = opClass.newMethod("void", (name + "Attr").str(),
-                                     (attr.getStorageType() + " attr").str());
-    auto &body = method.body();
+    auto *method = opClass.addMethodAndPrune("void", (name + "Attr").str(),
+                                             attr.getStorageType(), "attr");
+    if (!method)
+      return;
+    auto &body = method->body();
     body << "  this->getOperation()->setAttr(\"" << name << "\", attr);";
   };
 
@@ -640,13 +644,15 @@
                               int numVariadic, int numNonVariadic,
                               StringRef rangeSizeCall, bool hasAttrSegmentSize,
                               StringRef sizeAttrInit, RangeT &&odsValues) {
-  auto &method = opClass.newMethod("std::pair<unsigned, unsigned>", methodName,
-                                   "unsigned index");
-
+  auto *method = opClass.addMethodAndPrune("std::pair<unsigned, unsigned>",
+                                           methodName, "unsigned", "index");
+  if (!method)
+    return;
+  auto &body = method->body();
   if (numVariadic == 0) {
-    method.body() << "  return {index, 1};\n";
+    body << "  return {index, 1};\n";
   } else if (hasAttrSegmentSize) {
-    method.body() << sizeAttrInit << attrSizedSegmentValueRangeCalcCode;
+    body << sizeAttrInit << attrSizedSegmentValueRangeCalcCode;
   } else {
     // Because the op can have arbitrarily interleaved variadic and non-variadic
     // operands, we need to embed a list in the "sink" getter method for
@@ -656,9 +662,8 @@
     for (auto &it : odsValues)
       isVariadic.push_back(it.isVariableLength() ? "true" : "false");
     std::string isVariadicList = llvm::join(isVariadic, ", ");
-    method.body() << formatv(sameVariadicSizeValueRangeCalcCode, isVariadicList,
-                             numNonVariadic, numVariadic, rangeSizeCall,
-                             "operand");
+    body << formatv(sameVariadicSizeValueRangeCalcCode, isVariadicList,
+                    numNonVariadic, numVariadic, rangeSizeCall, "operand");
   }
 }
 
@@ -711,9 +716,11 @@
                                 rangeSizeCall, attrSizedOperands, sizeAttrInit,
                                 const_cast<Operator &>(op).getOperands());
 
-  auto &m = opClass.newMethod(rangeType, "getODSOperands", "unsigned index");
-  m.body() << formatv(valueRangeReturnCode, rangeBeginCall,
-                      "getODSOperandIndexAndLength(index)");
+  auto *m = opClass.addMethodAndPrune(rangeType, "getODSOperands", "unsigned",
+                                      "index");
+  auto &body = m->body();
+  body << formatv(valueRangeReturnCode, rangeBeginCall,
+                  "getODSOperandIndexAndLength(index)");
 
   // Then we emit nicer named getter methods by redirecting to the "sink" getter
   // method.
@@ -723,15 +730,15 @@
       continue;
 
     if (operand.isOptional()) {
-      auto &m = opClass.newMethod("::mlir::Value", operand.name);
-      m.body() << "  auto operands = getODSOperands(" << i << ");\n"
-               << "  return operands.empty() ? Value() : *operands.begin();";
+      m = opClass.addMethodAndPrune("::mlir::Value", operand.name);
+      m->body() << "  auto operands = getODSOperands(" << i << ");\n"
+                << "  return operands.empty() ? Value() : *operands.begin();";
     } else if (operand.isVariadic()) {
-      auto &m = opClass.newMethod(rangeType, operand.name);
-      m.body() << "  return getODSOperands(" << i << ");";
+      m = opClass.addMethodAndPrune(rangeType, operand.name);
+      m->body() << "  return getODSOperands(" << i << ");";
     } else {
-      auto &m = opClass.newMethod("::mlir::Value", operand.name);
-      m.body() << "  return *getODSOperands(" << i << ").begin();";
+      m = opClass.addMethodAndPrune("::mlir::Value", operand.name);
+      m->body() << "  return *getODSOperands(" << i << ").begin();";
     }
   }
 }
@@ -753,9 +760,9 @@
     const auto &operand = op.getOperand(i);
     if (operand.name.empty())
       continue;
-    auto &m = opClass.newMethod("::mlir::MutableOperandRange",
-                                (operand.name + "Mutable").str());
-    auto &body = m.body();
+    auto *m = opClass.addMethodAndPrune("::mlir::MutableOperandRange",
+                                        (operand.name + "Mutable").str());
+    auto &body = m->body();
     body << "  auto range = getODSOperandIndexAndLength(" << i << ");\n"
          << "  return ::mlir::MutableOperandRange(getOperation(), "
             "range.first, range.second";
@@ -800,10 +807,11 @@
       numNormalResults, "getOperation()->getNumResults()", attrSizedResults,
       formatv(opSegmentSizeAttrInitCode, "result_segment_sizes").str(),
       op.getResults());
-  auto &m = opClass.newMethod("::mlir::Operation::result_range",
-                              "getODSResults", "unsigned index");
-  m.body() << formatv(valueRangeReturnCode, "getOperation()->result_begin()",
-                      "getODSResultIndexAndLength(index)");
+
+  auto *m = opClass.addMethodAndPrune("::mlir::Operation::result_range",
+                                      "getODSResults", "unsigned", "index");
+  m->body() << formatv(valueRangeReturnCode, "getOperation()->result_begin()",
+                       "getODSResultIndexAndLength(index)");
 
   for (int i = 0; i != numResults; ++i) {
     const auto &result = op.getResult(i);
@@ -811,17 +819,17 @@
       continue;
 
     if (result.isOptional()) {
-      auto &m = opClass.newMethod("::mlir::Value", result.name);
-      m.body()
+      m = opClass.addMethodAndPrune("::mlir::Value", result.name);
+      m->body()
           << "  auto results = getODSResults(" << i << ");\n"
           << "  return results.empty() ? ::mlir::Value() : *results.begin();";
     } else if (result.isVariadic()) {
-      auto &m =
-          opClass.newMethod("::mlir::Operation::result_range", result.name);
-      m.body() << "  return getODSResults(" << i << ");";
+      m = opClass.addMethodAndPrune("::mlir::Operation::result_range",
+                                    result.name);
+      m->body() << "  return getODSResults(" << i << ");";
     } else {
-      auto &m = opClass.newMethod("::mlir::Value", result.name);
-      m.body() << "  return *getODSResults(" << i << ").begin();";
+      m = opClass.addMethodAndPrune("::mlir::Value", result.name);
+      m->body() << "  return *getODSResults(" << i << ").begin();";
     }
   }
 }
@@ -835,15 +843,15 @@
 
     // Generate the accessors for a varidiadic region.
     if (region.isVariadic()) {
-      auto &m =
-          opClass.newMethod("::mlir::MutableArrayRef<Region>", region.name);
-      m.body() << formatv(
+      auto *m = opClass.addMethodAndPrune("::mlir::MutableArrayRef<Region>",
+                                          region.name);
+      m->body() << formatv(
           "  return this->getOperation()->getRegions().drop_front({0});", i);
       continue;
     }
 
-    auto &m = opClass.newMethod("::mlir::Region &", region.name);
-    m.body() << formatv("  return this->getOperation()->getRegion({0});", i);
+    auto *m = opClass.addMethodAndPrune("::mlir::Region &", region.name);
+    m->body() << formatv("  return this->getOperation()->getRegion({0});", i);
   }
 }
 
@@ -856,16 +864,18 @@
 
     // Generate the accessors for a variadic successor list.
     if (successor.isVariadic()) {
-      auto &m = opClass.newMethod("::mlir::SuccessorRange", successor.name);
-      m.body() << formatv(
+      auto *m =
+          opClass.addMethodAndPrune("::mlir::SuccessorRange", successor.name);
+      m->body() << formatv(
           "  return {std::next(this->getOperation()->successor_begin(), {0}), "
           "this->getOperation()->successor_end()};",
           i);
       continue;
     }
 
-    auto &m = opClass.newMethod("::mlir::Block *", successor.name);
-    m.body() << formatv("  return this->getOperation()->getSuccessor({0});", i);
+    auto *m = opClass.addMethodAndPrune("::mlir::Block *", successor.name);
+    m->body() << formatv("  return this->getOperation()->getSuccessor({0});",
+                         i);
   }
 }
 
@@ -905,14 +915,16 @@
   // inferring result type.
   auto emit = [&](AttrParamKind attrType, TypeParamKind paramKind,
                   bool inferType) {
-    std::string paramList;
+    llvm::SmallVector<OpMethodParameter, 4> paramList;
     llvm::SmallVector<std::string, 4> resultNames;
     buildParamList(paramList, resultNames, paramKind, attrType);
 
-    auto &m =
-        opClass.newMethod("void", "build", paramList, OpMethod::MP_Static);
-    auto &body = m.body();
-
+    auto *m = opClass.addMethodAndPrune("void", "build", OpMethod::MP_Static,
+                                        std::move(paramList));
+    // If the builder is redundant, skip generating the method.
+    if (!m)
+      return;
+    auto &body = m->body();
     genCodeForAddingArgAndRegionForBuilder(
         body, /*isRawValueAttr=*/attrType == AttrParamKind::UnwrappedValue);
 
@@ -967,54 +979,13 @@
     llvm_unreachable("unhandled TypeParamKind");
   };
 
-  // A separate arg param builder method will have a signature which is
-  // ambiguous with the collective params build method (generated in
-  // `genCollectiveParamBuilder` function below) if it has a single
-  // `ArrayReg<Type>` parameter for result types and a single `ArrayRef<Value>`
-  // parameter for the operands, no parameters after that, and the collective
-  // params build method has `attributes` as its last parameter (with
-  // a default value). This will happen when all of the following are true:
-  // 1. [`attributes` as last parameter in collective params build method]:
-  //    getNumVariadicRegions must be 0 (otherwise the collective params build
-  //    method ends with a `numRegions` param, and we don't specify default
-  //    value for attributes).
-  // 2. [single `ArrayRef<Value>` parameter for operands, and no parameters
-  //    after that]: numArgs() must be 1 (if not, each arg gets a separate param
-  //    in the build methods generated here) and the single arg must be a
-  //    non-attribute variadic argument.
-  // 3. [single `ArrayReg<Type>` parameter for result types]:
-  //      3a. paramKind should be Collective, or
-  //      3b. paramKind should be Separate and there should be a single variadic
-  //          result
-  //
-  // In that case, skip generating such ambiguous build methods here.
+  // Some of the build methods generated here may be amiguous, but TableGen's
+  // ambiguous function detection will elide those ones.
   for (auto attrType : attrBuilderType) {
-    // Case 3b above.
-    if (!(op.hasNoVariadicRegions() && op.hasSingleVariadicArg() &&
-          op.hasSingleVariadicResult()))
-      emit(attrType, TypeParamKind::Separate, /*inferType=*/false);
-    if (canInferType(op)) {
-      // When inferType = true, the generated build method does not have
-      // result types. If the op has a single variadic arg, then this build
-      // method will be ambiguous with the collective inferred build method
-      // generated in `genInferredTypeCollectiveParamBuilder`. If we are going
-      // to generate that collective inferred method, suppress generating the
-      // ambiguous build method here.
-      bool buildMethodAmbiguous =
-          op.hasSingleVariadicArg() &&
-          shouldGenerateInferredTypeCollectiveParamBuilder();
-      if (!buildMethodAmbiguous)
-        emit(attrType, TypeParamKind::None, /*inferType=*/true);
-    }
-    // The separate arg + collective param kind method will be:
-    // (a) Same as the separate arg + separate param kind method if there is
-    //     only one variadic result.
-    // (b) Ambiguous with the collective params method under conditions in (3a)
-    //     above.
-    // In either case, skip generating such build method.
-    if (!op.hasSingleVariadicResult() &&
-        !(op.hasNoVariadicRegions() && op.hasSingleVariadicArg()))
-      emit(attrType, TypeParamKind::Collective, /*inferType=*/false);
+    emit(attrType, TypeParamKind::Separate, /*inferType=*/false);
+    if (canInferType(op))
+      emit(attrType, TypeParamKind::None, /*inferType=*/true);
+    emit(attrType, TypeParamKind::Collective, /*inferType=*/false);
   }
 }
 
@@ -1022,19 +993,23 @@
   int numResults = op.getNumResults();
 
   // Signature
-  std::string params =
-      std::string("::mlir::OpBuilder &odsBuilder, ::mlir::OperationState &") +
-      builderOpState +
-      ", ::mlir::ValueRange operands, ::llvm::ArrayRef<::mlir::NamedAttribute> "
-      "attributes";
-  if (op.getNumVariadicRegions()) {
-    params += ", unsigned numRegions";
-  } else {
-    // Provide default value for `attributes` since its the last parameter
-    params += " = {}";
-  }
-  auto &m = opClass.newMethod("void", "build", params, OpMethod::MP_Static);
-  auto &body = m.body();
+  llvm::SmallVector<OpMethodParameter, 4> paramList;
+  paramList.emplace_back("::mlir::OpBuilder &", "odsBuilder");
+  paramList.emplace_back("::mlir::OperationState &", builderOpState);
+  paramList.emplace_back("::mlir::ValueRange", "operands");
+  // Provide default value for `attributes` when its the last parameter
+  StringRef attributesDefaultValue = op.getNumVariadicRegions() ? "" : "{}";
+  paramList.emplace_back("::llvm::ArrayRef<::mlir::NamedAttribute>",
+                         "attributes", attributesDefaultValue);
+  if (op.getNumVariadicRegions())
+    paramList.emplace_back("unsigned", "numRegions");
+
+  auto *m = opClass.addMethodAndPrune("void", "build", OpMethod::MP_Static,
+                                      std::move(paramList));
+  // If the builder is redundant, skip generating the method
+  if (!m)
+    return;
+  auto &body = m->body();
 
   // Operands
   body << "  " << builderOpState << ".addOperands(operands);\n";
@@ -1056,19 +1031,20 @@
        << llvm::join(resultTypes, ", ") << "});\n\n";
 }
 
-bool OpEmitter::shouldGenerateInferredTypeCollectiveParamBuilder() {
-  return canInferType(op) && op.getNumSuccessors() == 0;
-}
-
 void OpEmitter::genInferredTypeCollectiveParamBuilder() {
   // TODO: Expand to support regions.
-  std::string params =
-      std::string("::mlir::OpBuilder &odsBuilder, ::mlir::OperationState &") +
-      builderOpState +
-      ", ::mlir::ValueRange operands, ::llvm::ArrayRef<::mlir::NamedAttribute> "
-      "attributes = {}";
-  auto &m = opClass.newMethod("void", "build", params, OpMethod::MP_Static);
-  auto &body = m.body();
+  SmallVector<OpMethodParameter, 4> paramList;
+  paramList.emplace_back("::mlir::OpBuilder &", "odsBuilder");
+  paramList.emplace_back("::mlir::OperationState &", builderOpState);
+  paramList.emplace_back("::mlir::ValueRange", "operands");
+  paramList.emplace_back("::llvm::ArrayRef<::mlir::NamedAttribute>",
+                         "attributes", "{}");
+  auto *m = opClass.addMethodAndPrune("void", "build", OpMethod::MP_Static,
+                                      std::move(paramList));
+  // If the builder is redundant, skip generating the method
+  if (!m)
+    return;
+  auto &body = m->body();
 
   int numResults = op.getNumResults();
   int numVariadicResults = op.getNumVariableLengthResults();
@@ -1116,12 +1092,17 @@
 }
 
 void OpEmitter::genUseOperandAsResultTypeSeparateParamBuilder() {
-  std::string paramList;
+  llvm::SmallVector<OpMethodParameter, 4> paramList;
   llvm::SmallVector<std::string, 4> resultNames;
   buildParamList(paramList, resultNames, TypeParamKind::None);
 
-  auto &m = opClass.newMethod("void", "build", paramList, OpMethod::MP_Static);
-  genCodeForAddingArgAndRegionForBuilder(m.body());
+  auto *m = opClass.addMethodAndPrune("void", "build", OpMethod::MP_Static,
+                                      std::move(paramList));
+  // If the builder is redundant, skip generating the method
+  if (!m)
+    return;
+  auto &body = m->body();
+  genCodeForAddingArgAndRegionForBuilder(body);
 
   auto numResults = op.getNumResults();
   if (numResults == 0)
@@ -1131,20 +1112,26 @@
   const char *index = op.getOperand(0).isVariadic() ? ".front()" : "";
   std::string resultType =
       formatv("{0}{1}.getType()", getArgumentName(op, 0), index).str();
-  m.body() << "  " << builderOpState << ".addTypes({" << resultType;
+  body << "  " << builderOpState << ".addTypes({" << resultType;
   for (int i = 1; i != numResults; ++i)
-    m.body() << ", " << resultType;
-  m.body() << "});\n\n";
+    body << ", " << resultType;
+  body << "});\n\n";
 }
 
 void OpEmitter::genUseAttrAsResultTypeBuilder() {
-  std::string params =
-      std::string("::mlir::OpBuilder &odsBuilder, ::mlir::OperationState &") +
-      builderOpState +
-      ", ::mlir::ValueRange operands, ::llvm::ArrayRef<::mlir::NamedAttribute> "
-      "attributes";
-  auto &m = opClass.newMethod("void", "build", params, OpMethod::MP_Static);
-  auto &body = m.body();
+  SmallVector<OpMethodParameter, 4> paramList;
+  paramList.emplace_back("::mlir::OpBuilder &", "odsBuilder");
+  paramList.emplace_back("::mlir::OperationState &", builderOpState);
+  paramList.emplace_back("::mlir::ValueRange", "operands");
+  paramList.emplace_back("::llvm::ArrayRef<::mlir::NamedAttribute>",
+                         "attributes", "{}");
+  auto *m = opClass.addMethodAndPrune("void", "build", OpMethod::MP_Static,
+                                      std::move(paramList));
+  // If the builder is redundant, skip generating the method
+  if (!m)
+    return;
+
+  auto &body = m->body();
 
   // Push all result types to the operation state
   std::string resultType;
@@ -1184,11 +1171,12 @@
         StringRef body = builderDef->getValueAsString("body");
         bool hasBody = !body.empty();
 
-        auto &method =
-            opClass.newMethod("void", "build", params, OpMethod::MP_Static,
-                              /*declOnly=*/!hasBody);
+        OpMethod::Property properties =
+            hasBody ? OpMethod::MP_Static : OpMethod::MP_StaticDeclaration;
+        auto *method =
+            opClass.addMethodAndPrune("void", "build", properties, params);
         if (hasBody)
-          method.body() << body;
+          method->body() << body;
       }
     }
     if (op.skipDefaultBuilders()) {
@@ -1214,21 +1202,8 @@
   //    to facilitate different call patterns.
   if (op.getNumVariableLengthResults() == 0) {
     if (op.getTrait("OpTrait::SameOperandsAndResultType")) {
-      // If the operation has a single variadic input, then the build method
-      // generated by `genUseOperandAsResultTypeSeparateParamBuilder` will be
-      // ambiguous with the one generated by
-      // `genUseOperandAsResultTypeCollectiveParamBuilder` (they both will have
-      // a single `ValueRange` argument for operands, and the collective one
-      // will have a `ArrayRef<NamedAttribute>` argument initialized to empty).
-      // Suppress such ambiguous build method.
-      if (!op.hasSingleVariadicArg())
-        genUseOperandAsResultTypeSeparateParamBuilder();
-
-      // The build method generated by the inferred type collective param
-      // builder and one generated here have the same arguments and hence
-      // generating both will be ambiguous. Enable just one of them.
-      if (!shouldGenerateInferredTypeCollectiveParamBuilder())
-        genUseOperandAsResultTypeCollectiveParamBuilder();
+      genUseOperandAsResultTypeSeparateParamBuilder();
+      genUseOperandAsResultTypeCollectiveParamBuilder();
     }
     if (op.getTrait("OpTrait::FirstAttrDerivedResultType"))
       genUseAttrAsResultTypeBuilder();
@@ -1243,21 +1218,25 @@
   int numOperands = op.getNumOperands();
   int numVariadicOperands = op.getNumVariableLengthOperands();
   int numNonVariadicOperands = numOperands - numVariadicOperands;
-  // Signature
-  std::string params =
-      std::string("::mlir::OpBuilder &, ::mlir::OperationState &") +
-      builderOpState +
-      ", ::llvm::ArrayRef<::mlir::Type> resultTypes, ::mlir::ValueRange "
-      "operands, "
-      "::llvm::ArrayRef<::mlir::NamedAttribute> attributes";
-  if (op.getNumVariadicRegions()) {
-    params += ", unsigned numRegions";
-  } else {
-    // Provide default value for `attributes` since its the last parameter
-    params += " = {}";
-  }
-  auto &m = opClass.newMethod("void", "build", params, OpMethod::MP_Static);
-  auto &body = m.body();
+
+  SmallVector<OpMethodParameter, 4> paramList;
+  paramList.emplace_back("::mlir::OpBuilder &", "");
+  paramList.emplace_back("::mlir::OperationState &", builderOpState);
+  paramList.emplace_back("::llvm::ArrayRef<::mlir::Type>", "resultTypes");
+  paramList.emplace_back("::mlir::ValueRange", "operands");
+  // Provide default value for `attributes` when its the last parameter
+  StringRef attributesDefaultValue = op.getNumVariadicRegions() ? "" : "{}";
+  paramList.emplace_back("::llvm::ArrayRef<::mlir::NamedAttribute>",
+                         "attributes", attributesDefaultValue);
+  if (op.getNumVariadicRegions())
+    paramList.emplace_back("unsigned", "numRegions");
+
+  auto *m = opClass.addMethodAndPrune("void", "build", OpMethod::MP_Static,
+                                      std::move(paramList));
+  // If the builder is redundant, skip generating the method
+  if (!m)
+    return;
+  auto &body = m->body();
 
   // Operands
   if (numVariadicOperands == 0 || numNonVariadicOperands != 0)
@@ -1287,11 +1266,11 @@
 
   // Generate builder that infers type too.
   // TODO: Expand to handle regions and successors.
-  if (shouldGenerateInferredTypeCollectiveParamBuilder())
+  if (canInferType(op) && op.getNumSuccessors() == 0)
     genInferredTypeCollectiveParamBuilder();
 }
 
-void OpEmitter::buildParamList(std::string &paramList,
+void OpEmitter::buildParamList(SmallVectorImpl<OpMethodParameter> &paramList,
                                SmallVectorImpl<std::string> &resultTypeNames,
                                TypeParamKind typeParamKind,
                                AttrParamKind attrParamKind) {
@@ -1299,8 +1278,8 @@
   auto numResults = op.getNumResults();
   resultTypeNames.reserve(numResults);
 
-  paramList = "::mlir::OpBuilder &odsBuilder, ::mlir::OperationState &";
-  paramList.append(builderOpState);
+  paramList.emplace_back("::mlir::OpBuilder &", "odsBuilder");
+  paramList.emplace_back("::mlir::OperationState &", builderOpState);
 
   switch (typeParamKind) {
   case TypeParamKind::None:
@@ -1313,19 +1292,18 @@
       if (resultName.empty())
         resultName = std::string(formatv("resultType{0}", i));
 
+      StringRef type = result.isVariadic() ? "::llvm::ArrayRef<::mlir::Type>"
+                                           : "::mlir::Type";
+      OpMethodParameter::Property properties = OpMethodParameter::PP_None;
       if (result.isOptional())
-        paramList.append(", /*optional*/::mlir::Type ");
-      else if (result.isVariadic())
-        paramList.append(", ::llvm::ArrayRef<::mlir::Type> ");
-      else
-        paramList.append(", ::mlir::Type ");
-      paramList.append(resultName);
+        properties = OpMethodParameter::PP_Optional;
 
+      paramList.emplace_back(type, resultName, properties);
       resultTypeNames.emplace_back(std::move(resultName));
     }
   } break;
   case TypeParamKind::Collective: {
-    paramList.append(", ::llvm::ArrayRef<::mlir::Type> resultTypes");
+    paramList.emplace_back("::llvm::ArrayRef<::mlir::Type>", "resultTypes");
     resultTypeNames.push_back("resultTypes");
   } break;
   }
@@ -1364,64 +1342,64 @@
     auto argument = op.getArg(i);
     if (argument.is<tblgen::NamedTypeConstraint *>()) {
       const auto &operand = op.getOperand(numOperands);
+      StringRef type =
+          operand.isVariadic() ? "::mlir::ValueRange" : "::mlir::Value";
+      OpMethodParameter::Property properties = OpMethodParameter::PP_None;
       if (operand.isOptional())
-        paramList.append(", /*optional*/::mlir::Value ");
-      else if (operand.isVariadic())
-        paramList.append(", ::mlir::ValueRange ");
-      else
-        paramList.append(", ::mlir::Value ");
-      paramList.append(getArgumentName(op, numOperands));
+        properties = OpMethodParameter::PP_Optional;
+
+      paramList.emplace_back(type, getArgumentName(op, numOperands),
+                             properties);
       ++numOperands;
     } else {
       const auto &namedAttr = op.getAttribute(numAttrs);
       const auto &attr = namedAttr.attr;
-      paramList.append(", ");
 
+      OpMethodParameter::Property properties = OpMethodParameter::PP_None;
       if (attr.isOptional())
-        paramList.append("/*optional*/");
+        properties = OpMethodParameter::PP_Optional;
 
+      StringRef type;
       switch (attrParamKind) {
       case AttrParamKind::WrappedAttr:
-        paramList.append(std::string(attr.getStorageType()));
+        type = attr.getStorageType();
         break;
       case AttrParamKind::UnwrappedValue:
-        if (canUseUnwrappedRawValue(attr)) {
-          paramList.append(std::string(attr.getReturnType()));
-        } else {
-          paramList.append(std::string(attr.getStorageType()));
-        }
+        if (canUseUnwrappedRawValue(attr))
+          type = attr.getReturnType();
+        else
+          type = attr.getStorageType();
         break;
       }
-      paramList.append(" ");
-      paramList.append(std::string(namedAttr.name));
 
+      std::string defaultValue;
       // Attach default value if requested and possible.
       if (attrParamKind == AttrParamKind::UnwrappedValue &&
           i >= defaultValuedAttrStartIndex) {
         bool isString = attr.getReturnType() == "::llvm::StringRef";
-        paramList.append(" = ");
         if (isString)
-          paramList.append("\"");
-        paramList.append(std::string(attr.getDefaultValue()));
+          defaultValue.append("\"");
+        defaultValue += attr.getDefaultValue();
         if (isString)
-          paramList.append("\"");
+          defaultValue.append("\"");
       }
+      paramList.emplace_back(type, namedAttr.name, defaultValue, properties);
       ++numAttrs;
     }
   }
 
   /// Insert parameters for each successor.
   for (const NamedSuccessor &succ : op.getSuccessors()) {
-    paramList += (succ.isVariadic() ? ", ::llvm::ArrayRef<::mlir::Block *> "
-                                    : ", ::mlir::Block *");
-    paramList += succ.name;
+    StringRef type = succ.isVariadic() ? "::llvm::ArrayRef<::mlir::Block *>"
+                                       : "::mlir::Block *";
+    paramList.emplace_back(type, succ.name);
   }
 
   /// Insert parameters for variadic regions.
-  for (const NamedRegion &region : op.getRegions()) {
+  for (const NamedRegion &region : op.getRegions())
     if (region.isVariadic())
-      paramList += llvm::formatv(", unsigned {0}Count", region.name).str();
-  }
+      paramList.emplace_back("unsigned",
+                             llvm::formatv("{0}Count", region.name).str());
 }
 
 void OpEmitter::genCodeForAddingArgAndRegionForBuilder(OpMethodBody &body,
@@ -1508,10 +1486,12 @@
   if (!def.getValueAsBit("hasCanonicalizer"))
     return;
 
-  const char *const params =
-      "::mlir::OwningRewritePatternList &results, ::mlir::MLIRContext *context";
-  opClass.newMethod("void", "getCanonicalizationPatterns", params,
-                    OpMethod::MP_Static, /*declOnly=*/true);
+  SmallVector<OpMethodParameter, 2> paramList;
+  paramList.emplace_back("::mlir::OwningRewritePatternList &", "results");
+  paramList.emplace_back("::mlir::MLIRContext *", "context");
+  opClass.addMethodAndPrune("void", "getCanonicalizationPatterns",
+                            OpMethod::MP_StaticDeclaration,
+                            std::move(paramList));
 }
 
 void OpEmitter::genFolderDecls() {
@@ -1520,17 +1500,16 @@
 
   if (def.getValueAsBit("hasFolder")) {
     if (hasSingleResult) {
-      const char *const params = "::llvm::ArrayRef<::mlir::Attribute> operands";
-      opClass.newMethod("::mlir::OpFoldResult", "fold", params,
-                        OpMethod::MP_None,
-                        /*declOnly=*/true);
+      opClass.addMethodAndPrune(
+          "::mlir::OpFoldResult", "fold", OpMethod::MP_Declaration,
+          "::llvm::ArrayRef<::mlir::Attribute>", "operands");
     } else {
-      const char *const params =
-          "::llvm::ArrayRef<::mlir::Attribute> operands, "
-          "::llvm::SmallVectorImpl<::mlir::OpFoldResult> &results";
-      opClass.newMethod("::mlir::LogicalResult", "fold", params,
-                        OpMethod::MP_None,
-                        /*declOnly=*/true);
+      SmallVector<OpMethodParameter, 2> paramList;
+      paramList.emplace_back("::llvm::ArrayRef<::mlir::Attribute>", "operands");
+      paramList.emplace_back("::llvm::SmallVectorImpl<::mlir::OpFoldResult> &",
+                             "results");
+      opClass.addMethodAndPrune("::mlir::LogicalResult", "fold",
+                                OpMethod::MP_Declaration, std::move(paramList));
     }
   }
 }
@@ -1554,16 +1533,14 @@
         !alwaysDeclaredMethods.count(method.getName()))
       continue;
 
-    std::string args;
-    llvm::raw_string_ostream os(args);
-    interleaveComma(method.getArguments(), os,
-                    [&](const InterfaceMethod::Argument &arg) {
-                      os << arg.type << " " << arg.name;
-                    });
-    opClass.newMethod(method.getReturnType(), method.getName(), os.str(),
-                      method.isStatic() ? OpMethod::MP_Static
-                                        : OpMethod::MP_None,
-                      /*declOnly=*/true);
+    SmallVector<OpMethodParameter, 4> paramList;
+    for (const InterfaceMethod::Argument &arg : method.getArguments())
+      paramList.emplace_back(arg.type, arg.name);
+
+    auto properties = method.isStatic() ? OpMethod::MP_StaticDeclaration
+                                        : OpMethod::MP_Declaration;
+    opClass.addMethodAndPrune(method.getReturnType(), method.getName(),
+                              properties, std::move(paramList));
   }
 }
 
@@ -1622,15 +1599,14 @@
     resolveDecorators(op.getResultDecorators(i), i, EffectKind::Result);
 
   for (auto &it : interfaceEffects) {
-    auto effectsParam =
-        llvm::formatv("::mlir::SmallVectorImpl<::mlir::SideEffects::"
-                      "EffectInstance<{0}>> &effects",
-                      it.first())
-            .str();
-
     // Generate the 'getEffects' method.
-    auto &getEffects = opClass.newMethod("void", "getEffects", effectsParam);
-    auto &body = getEffects.body();
+    std::string type = llvm::formatv("::mlir::SmallVectorImpl<::mlir::"
+                                     "SideEffects::EffectInstance<{0}>> &",
+                                     it.first())
+                           .str();
+    auto *getEffects =
+        opClass.addMethodAndPrune("void", "getEffects", type, "effects");
+    auto &body = getEffects->body();
 
     // Add effect instances for each of the locations marked on the operation.
     for (auto &location : it.second) {
@@ -1655,21 +1631,24 @@
   if (!op.allResultTypesKnown())
     return;
 
-  auto &method = opClass.newMethod(
-      "::mlir::LogicalResult", "inferReturnTypes",
-      "::mlir::MLIRContext* context, "
-      "::llvm::Optional<::mlir::Location> location, "
-      "::mlir::ValueRange operands, ::mlir::DictionaryAttr attributes, "
-      "::mlir::RegionRange regions, "
-      "::llvm::SmallVectorImpl<::mlir::Type>& inferredReturnTypes",
-      OpMethod::MP_Static,
-      /*declOnly=*/false);
-  auto &os = method.body();
-  os << "  inferredReturnTypes.resize(" << op.getNumResults() << ");\n";
+  SmallVector<OpMethodParameter, 4> paramList;
+  paramList.emplace_back("::mlir::MLIRContext *", "context");
+  paramList.emplace_back("::llvm::Optional<::mlir::Location>", "location");
+  paramList.emplace_back("::mlir::ValueRange", "operands");
+  paramList.emplace_back("::mlir::DictionaryAttr", "attributes");
+  paramList.emplace_back("::mlir::RegionRange", "regions");
+  paramList.emplace_back("::llvm::SmallVectorImpl<::mlir::Type>&",
+                         "inferredReturnTypes");
+  auto *method =
+      opClass.addMethodAndPrune("::mlir::LogicalResult", "inferReturnTypes",
+                                OpMethod::MP_Static, std::move(paramList));
+
+  auto &body = method->body();
+  body << "  inferredReturnTypes.resize(" << op.getNumResults() << ");\n";
 
   FmtContext fctx;
   fctx.withBuilder("odsBuilder");
-  os << "  ::mlir::Builder odsBuilder(context);\n";
+  body << "  ::mlir::Builder odsBuilder(context);\n";
 
   auto emitType =
       [&](const tblgen::Operator::ArgOrType &type) -> OpMethodBody & {
@@ -1678,24 +1657,24 @@
       assert(!op.getArg(argIndex).is<NamedAttribute *>());
       auto arg = op.getArgToOperandOrAttribute(argIndex);
       if (arg.kind() == Operator::OperandOrAttribute::Kind::Operand)
-        return os << "operands[" << arg.operandOrAttributeIndex()
+        return body << "operands[" << arg.operandOrAttributeIndex()
+                    << "].getType()";
+      return body << "attributes[" << arg.operandOrAttributeIndex()
                   << "].getType()";
-      return os << "attributes[" << arg.operandOrAttributeIndex()
-                << "].getType()";
     } else {
-      return os << tgfmt(*type.getType().getBuilderCall(), &fctx);
+      return body << tgfmt(*type.getType().getBuilderCall(), &fctx);
     }
   };
 
   for (int i = 0, e = op.getNumResults(); i != e; ++i) {
-    os << "  inferredReturnTypes[" << i << "] = ";
+    body << "  inferredReturnTypes[" << i << "] = ";
     auto types = op.getSameTypeAsResult(i);
     emitType(types[0]) << ";\n";
     if (types.size() == 1)
       continue;
     // TODO: We could verify equality here, but skipping that for verification.
   }
-  os << "  return success();";
+  body << "  return success();";
 }
 
 void OpEmitter::genParser() {
@@ -1703,14 +1682,17 @@
       hasStringAttribute(def, "assemblyFormat"))
     return;
 
-  auto &method = opClass.newMethod(
-      "::mlir::ParseResult", "parse",
-      "::mlir::OpAsmParser &parser, ::mlir::OperationState &result",
-      OpMethod::MP_Static);
+  SmallVector<OpMethodParameter, 2> paramList;
+  paramList.emplace_back("::mlir::OpAsmParser &", "parser");
+  paramList.emplace_back("::mlir::OperationState &", "result");
+  auto *method =
+      opClass.addMethodAndPrune("::mlir::ParseResult", "parse",
+                                OpMethod::MP_Static, std::move(paramList));
+
   FmtContext fctx;
   fctx.addSubst("cppClass", opClass.getClassName());
   auto parser = def.getValueAsString("parser").ltrim().rtrim(" \t\v\f\r");
-  method.body() << "  " << tgfmt(parser, &fctx);
+  method->body() << "  " << tgfmt(parser, &fctx);
 }
 
 void OpEmitter::genPrinter() {
@@ -1722,17 +1704,17 @@
   if (!codeInit)
     return;
 
-  auto &method = opClass.newMethod("void", "print", "::mlir::OpAsmPrinter &p");
+  auto *method =
+      opClass.addMethodAndPrune("void", "print", "::mlir::OpAsmPrinter &", "p");
   FmtContext fctx;
   fctx.addSubst("cppClass", opClass.getClassName());
   auto printer = codeInit->getValue().ltrim().rtrim(" \t\v\f\r");
-  method.body() << "  " << tgfmt(printer, &fctx);
+  method->body() << "  " << tgfmt(printer, &fctx);
 }
 
 void OpEmitter::genVerifier() {
-  auto &method =
-      opClass.newMethod("::mlir::LogicalResult", "verify", /*params=*/"");
-  auto &body = method.body();
+  auto *method = opClass.addMethodAndPrune("::mlir::LogicalResult", "verify");
+  auto &body = method->body();
   body << "  if (failed(" << op.getAdaptorName()
        << "(*this).verify(this->getLoc()))) "
        << "return failure();\n";
@@ -1975,9 +1957,9 @@
 }
 
 void OpEmitter::genOpNameGetter() {
-  auto &method = opClass.newMethod("::llvm::StringRef", "getOperationName",
-                                   /*params=*/"", OpMethod::MP_Static);
-  method.body() << "  return \"" << op.getOperationName() << "\";\n";
+  auto *method = opClass.addMethodAndPrune(
+      "::llvm::StringRef", "getOperationName", OpMethod::MP_Static);
+  method->body() << "  return \"" << op.getOperationName() << "\";\n";
 }
 
 void OpEmitter::genOpAsmInterface() {
@@ -2001,9 +1983,9 @@
   opClass.addTrait("::mlir::OpAsmOpInterface::Trait");
 
   // Generate the right accessor for the number of results.
-  auto &method = opClass.newMethod("void", "getAsmResultNames",
-                                   "OpAsmSetValueNameFn setNameFn");
-  auto &body = method.body();
+  auto *method = opClass.addMethodAndPrune("void", "getAsmResultNames",
+                                           "OpAsmSetValueNameFn", "setNameFn");
+  auto &body = method->body();
   for (int i = 0; i != numResults; ++i) {
     body << "  auto resultGroup" << i << " = getODSResults(" << i << ");\n"
          << "  if (!llvm::empty(resultGroup" << i << "))\n"
@@ -2044,22 +2026,23 @@
   const auto *attrSizedOperands =
       op.getTrait("OpTrait::AttrSizedOperandSegments");
   {
-    auto &constructor = adaptor.newConstructor(
-        attrSizedOperands
-            ? "::mlir::ValueRange values, ::mlir::DictionaryAttr attrs"
-            : "::mlir::ValueRange values, ::mlir::DictionaryAttr attrs = "
-              "nullptr");
-    constructor.addMemberInitializer("odsOperands", "values");
-    constructor.addMemberInitializer("odsAttrs", "attrs");
+    SmallVector<OpMethodParameter, 2> paramList;
+    paramList.emplace_back("::mlir::ValueRange", "values");
+    paramList.emplace_back("::mlir::DictionaryAttr", "attrs",
+                           attrSizedOperands ? "" : "nullptr");
+    auto *constructor = adaptor.addConstructorAndPrune(std::move(paramList));
+
+    constructor->addMemberInitializer("odsOperands", "values");
+    constructor->addMemberInitializer("odsAttrs", "attrs");
   }
 
   {
-    auto &constructor = adaptor.newConstructor(
-        llvm::formatv("{0}& op", op.getCppClassName()).str());
-    constructor.addMemberInitializer("odsOperands",
-                                     "op.getOperation()->getOperands()");
-    constructor.addMemberInitializer("odsAttrs",
-                                     "op.getOperation()->getAttrDictionary()");
+    auto *constructor = adaptor.addConstructorAndPrune(
+        llvm::formatv("{0}&", op.getCppClassName()).str(), "op");
+    constructor->addMemberInitializer("odsOperands",
+                                      "op.getOperation()->getOperands()");
+    constructor->addMemberInitializer("odsAttrs",
+                                      "op.getOperation()->getAttrDictionary()");
   }
 
   std::string sizeAttrInit =
@@ -2074,7 +2057,7 @@
   fctx.withBuilder("::mlir::Builder(odsAttrs.getContext())");
 
   auto emitAttr = [&](StringRef name, Attribute attr) {
-    auto &body = adaptor.newMethod(attr.getStorageType(), name).body();
+    auto &body = adaptor.addMethodAndPrune(attr.getStorageType(), name)->body();
     body << "  assert(odsAttrs && \"no attributes when constructing adapter\");"
          << "\n  " << attr.getStorageType() << " attr = "
          << "odsAttrs.get(\"" << name << "\").";
@@ -2107,9 +2090,9 @@
 }
 
 void OpOperandAdaptorEmitter::addVerification() {
-  auto &method = adaptor.newMethod("::mlir::LogicalResult", "verify",
-                                   /*params=*/"::mlir::Location loc");
-  auto &body = method.body();
+  auto *method = adaptor.addMethodAndPrune("::mlir::LogicalResult", "verify",
+                                           "::mlir::Location", "loc");
+  auto &body = method->body();
 
   const char *checkAttrSizedValueSegmentsCode = R"(
   {
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
@@ -922,11 +922,14 @@
 }
 
 void OperationFormat::genParser(Operator &op, OpClass &opClass) {
-  auto &method = opClass.newMethod(
-      "::mlir::ParseResult", "parse",
-      "::mlir::OpAsmParser &parser, ::mlir::OperationState &result",
-      OpMethod::MP_Static);
-  auto &body = method.body();
+  llvm::SmallVector<OpMethodParameter, 4> paramList;
+  paramList.emplace_back("::mlir::OpAsmParser &", "parser");
+  paramList.emplace_back("::mlir::OperationState &", "result");
+
+  auto *method =
+      opClass.addMethodAndPrune("::mlir::ParseResult", "parse",
+                                OpMethod::MP_Static, std::move(paramList));
+  auto &body = method->body();
 
   // Generate variables to store the operands and type within the format. This
   // allows for referencing these variables in the presence of optional
@@ -1607,8 +1610,9 @@
 }
 
 void OperationFormat::genPrinter(Operator &op, OpClass &opClass) {
-  auto &method = opClass.newMethod("void", "print", "OpAsmPrinter &p");
-  auto &body = method.body();
+  auto *method =
+      opClass.addMethodAndPrune("void", "print", "OpAsmPrinter &", "p");
+  auto &body = method->body();
 
   // Emit the operation name, trimming the prefix if this is the standard
   // dialect.