Refactor OperationName to use virtual tables for dispatch (NFC)

This streamlines the implementation and makes it so that the virtual tables are in the binary instead of dynamically assembled during initialization.
The dynamic allocation size of op registration is also smaller with this
change.

Differential Revision: https://reviews.llvm.org/D141492

mlir/include/mlir/IR/ExtensibleDialect.h

@@ -336,12 +336,15 @@ class DynamicType
 
 /// The definition of a dynamic op. A dynamic op is an op that is defined at
 /// runtime, and that can be registered at runtime by an extensible dialect (a
-/// dialect inheriting ExtensibleDialect). This class stores the functions that
-/// are in the OperationName class, and in addition defines the TypeID of the op
-/// that will be defined.
-/// Each dynamic operation definition refers to one instance of this class.
-class DynamicOpDefinition {
+/// dialect inheriting ExtensibleDialect). This class implements the method
+/// exposed by the OperationName class, and in addition defines the TypeID of
+/// the op that will be defined. Each dynamic operation definition refers to one
+/// instance of this class.
+class DynamicOpDefinition : public OperationName::Impl {
 public:
+  using GetCanonicalizationPatternsFn =
+      llvm::unique_function<void(RewritePatternSet &, MLIRContext *) const>;
+
   /// Create a new op at runtime. The op is registered only after passing it to
   /// the dialect using registerDynamicOp.
   static std::unique_ptr<DynamicOpDefinition>
@@ -361,8 +364,7 @@ class DynamicOpDefinition {
       OperationName::ParseAssemblyFn &&parseFn,
       OperationName::PrintAssemblyFn &&printFn,
       OperationName::FoldHookFn &&foldHookFn,
-      OperationName::GetCanonicalizationPatternsFn
-          &&getCanonicalizationPatternsFn,
+      GetCanonicalizationPatternsFn &&getCanonicalizationPatternsFn,
       OperationName::PopulateDefaultAttrsFn &&populateDefaultAttrsFn);
 
   /// Returns the op typeID.
@@ -400,9 +402,8 @@ class DynamicOpDefinition {
 
   /// Set the hook returning any canonicalization pattern rewrites that the op
   /// supports, for use by the canonicalization pass.
-  void
-  setGetCanonicalizationPatternsFn(OperationName::GetCanonicalizationPatternsFn
-                                       &&getCanonicalizationPatterns) {
+  void setGetCanonicalizationPatternsFn(
+      GetCanonicalizationPatternsFn &&getCanonicalizationPatterns) {
     getCanonicalizationPatternsFn = std::move(getCanonicalizationPatterns);
   }
 
@@ -412,6 +413,29 @@ class DynamicOpDefinition {
     populateDefaultAttrsFn = std::move(populateDefaultAttrs);
   }
 
+  LogicalResult foldHook(Operation *op, ArrayRef<Attribute> attrs,
+                         SmallVectorImpl<OpFoldResult> &results) final {
+    return foldHookFn(op, attrs, results);
+  }
+  void getCanonicalizationPatterns(RewritePatternSet &set,
+                                   MLIRContext *context) final {
+    getCanonicalizationPatternsFn(set, context);
+  }
+  bool hasTrait(TypeID id) final { return false; }
+  OperationName::ParseAssemblyFn getParseAssemblyFn() final { return parseFn; }
+  void populateDefaultAttrs(const OperationName &name,
+                            NamedAttrList &attrs) final {
+    populateDefaultAttrsFn(name, attrs);
+  }
+  void printAssembly(Operation *op, OpAsmPrinter &printer,
+                     StringRef name) final {
+    printFn(op, printer, name);
+  }
+  LogicalResult verifyInvariants(Operation *op) final { return verifyFn(op); }
+  LogicalResult verifyRegionInvariants(Operation *op) final {
+    return verifyRegionFn(op);
+  }
+
 private:
   DynamicOpDefinition(
       StringRef name, ExtensibleDialect *dialect,
@@ -420,26 +444,18 @@ class DynamicOpDefinition {
       OperationName::ParseAssemblyFn &&parseFn,
       OperationName::PrintAssemblyFn &&printFn,
       OperationName::FoldHookFn &&foldHookFn,
-      OperationName::GetCanonicalizationPatternsFn
-          &&getCanonicalizationPatternsFn,
+      GetCanonicalizationPatternsFn &&getCanonicalizationPatternsFn,
       OperationName::PopulateDefaultAttrsFn &&populateDefaultAttrsFn);
 
-  /// Unique identifier for this operation.
-  TypeID typeID;
-
-  /// Name of the operation.
-  /// The name is prefixed with the dialect name.
-  std::string name;
-
   /// Dialect defining this operation.
-  ExtensibleDialect *dialect;
+  ExtensibleDialect *getdialect();
 
   OperationName::VerifyInvariantsFn verifyFn;
   OperationName::VerifyRegionInvariantsFn verifyRegionFn;
   OperationName::ParseAssemblyFn parseFn;
   OperationName::PrintAssemblyFn printFn;
   OperationName::FoldHookFn foldHookFn;
-  OperationName::GetCanonicalizationPatternsFn getCanonicalizationPatternsFn;
+  GetCanonicalizationPatternsFn getCanonicalizationPatternsFn;
   OperationName::PopulateDefaultAttrsFn populateDefaultAttrsFn;
 
   friend ExtensibleDialect;

mlir/include/mlir/IR/OpDefinition.h

@@ -183,8 +183,7 @@ class OpState {
                                           MLIRContext *context) {}
 
   /// This hook populates any unset default attrs.
-  static void populateDefaultAttrs(const RegisteredOperationName &,
-                                   NamedAttrList &) {}
+  static void populateDefaultAttrs(const OperationName &, NamedAttrList &) {}
 
 protected:
   /// If the concrete type didn't implement a custom verifier hook, just fall
@@ -1831,20 +1830,11 @@ class Op : public OpState, public Traits<ConcreteType>... {
     return result;
   }
 
-  /// Implementation of `GetCanonicalizationPatternsFn` OperationName hook.
-  static OperationName::GetCanonicalizationPatternsFn
-  getGetCanonicalizationPatternsFn() {
-    return &ConcreteType::getCanonicalizationPatterns;
-  }
   /// Implementation of `GetHasTraitFn`
   static OperationName::HasTraitFn getHasTraitFn() {
     return
         [](TypeID id) { return op_definition_impl::hasTrait<Traits...>(id); };
   }
-  /// Implementation of `ParseAssemblyFn` OperationName hook.
-  static OperationName::ParseAssemblyFn getParseAssemblyFn() {
-    return &ConcreteType::parse;
-  }
   /// Implementation of `PrintAssemblyFn` OperationName hook.
   static OperationName::PrintAssemblyFn getPrintAssemblyFn() {
     if constexpr (detect_has_print<ConcreteType>::value)

mlir/include/mlir/IR/Operation.h

@@ -505,11 +505,9 @@ class alignas(8) Operation final
 
   /// Sets default attributes on unset attributes.
   void populateDefaultAttrs() {
-    if (auto registered = getRegisteredInfo()) {
       NamedAttrList attrs(getAttrDictionary());
-      registered->populateDefaultAttrs(attrs);
+      name.populateDefaultAttrs(attrs);
       setAttrs(attrs.getDictionary(getContext()));
-    }
   }
 
   //===--------------------------------------------------------------------===//