[mlir][polynomial] use typed attributes for polynomial.constant op (#92818)

Co-authored-by: Jeremy Kun <[email protected]>

Author: j2kun

mlir/include/mlir/Dialect/Polynomial/IR/Polynomial.td

@@ -52,8 +52,8 @@ def Polynomial_AddOp : Polynomial_BinaryOp<"add", [Commutative]> {
     // add two polynomials modulo x^1024 - 1
     #poly = #polynomial.int_polynomial<x**1024 - 1>
     #ring = #polynomial.ring<coefficientType=i32, coefficientModulus=65536:i32, polynomialModulus=#poly>
-    %0 = polynomial.constant #polynomial.int_polynomial<1 + x**2> : !polynomial.polynomial<#ring>
-    %1 = polynomial.constant #polynomial.int_polynomial<x**5 - x + 1> : !polynomial.polynomial<#ring>
+    %0 = polynomial.constant int<1 + x**2> : !polynomial.polynomial<#ring>
+    %1 = polynomial.constant int<x**5 - x + 1> : !polynomial.polynomial<#ring>
     %2 = polynomial.add %0, %1 : !polynomial.polynomial<#ring>
     ```
   }];
@@ -76,8 +76,8 @@ def Polynomial_SubOp : Polynomial_BinaryOp<"sub"> {
     // subtract two polynomials modulo x^1024 - 1
     #poly = #polynomial.int_polynomial<x**1024 - 1>
     #ring = #polynomial.ring<coefficientType=i32, coefficientModulus=65536:i32, polynomialModulus=#poly>
-    %0 = polynomial.constant #polynomial.int_polynomial<1 + x**2> : !polynomial.polynomial<#ring>
-    %1 = polynomial.constant #polynomial.int_polynomial<x**5 - x + 1> : !polynomial.polynomial<#ring>
+    %0 = polynomial.constant int<1 + x**2> : !polynomial.polynomial<#ring>
+    %1 = polynomial.constant int<x**5 - x + 1> : !polynomial.polynomial<#ring>
     %2 = polynomial.sub %0, %1 : !polynomial.polynomial<#ring>
     ```
   }];
@@ -101,8 +101,8 @@ def Polynomial_MulOp : Polynomial_BinaryOp<"mul", [Commutative]> {
     // multiply two polynomials modulo x^1024 - 1
     #poly = #polynomial.int_polynomial<x**1024 - 1>
     #ring = #polynomial.ring<coefficientType=i32, coefficientModulus=65536:i32, polynomialModulus=#poly>
-    %0 = polynomial.constant #polynomial.int_polynomial<1 + x**2> : !polynomial.polynomial<#ring>
-    %1 = polynomial.constant #polynomial.int_polynomial<x**5 - x + 1> : !polynomial.polynomial<#ring>
+    %0 = polynomial.constant int<1 + x**2> : !polynomial.polynomial<#ring>
+    %1 = polynomial.constant int<x**5 - x + 1> : !polynomial.polynomial<#ring>
     %2 = polynomial.mul %0, %1 : !polynomial.polynomial<#ring>
     ```
   }];
@@ -126,7 +126,7 @@ def Polynomial_MulScalarOp : Polynomial_Op<"mul_scalar", [
     // multiply two polynomials modulo x^1024 - 1
     #poly = #polynomial.int_polynomial<x**1024 - 1>
     #ring = #polynomial.ring<coefficientType=i32, coefficientModulus=65536:i32, polynomialModulus=#poly>
-    %0 = polynomial.constant #polynomial.int_polynomial<1 + x**2> : !polynomial.polynomial<#ring>
+    %0 = polynomial.constant int<1 + x**2> : !polynomial.polynomial<#ring>
     %1 = arith.constant 3 : i32
     %2 = polynomial.mul_scalar %0, %1 : !polynomial.polynomial<#ring>, i32
     ```
@@ -157,7 +157,7 @@ def Polynomial_LeadingTermOp: Polynomial_Op<"leading_term"> {
     ```mlir
     #poly = #polynomial.int_polynomial<x**1024 - 1>
     #ring = #polynomial.ring<coefficientType=i32, coefficientModulus=65536:i32, polynomialModulus=#poly>
-    %0 = polynomial.constant #polynomial.int_polynomial<1 + x**2> : !polynomial.polynomial<#ring>
+    %0 = polynomial.constant int<1 + x**2> : !polynomial.polynomial<#ring>
     %1, %2 = polynomial.leading_term %0 : !polynomial.polynomial<#ring> -> (index, i32)
     ```
   }];
@@ -272,29 +272,29 @@ def Polynomial_ToTensorOp : Polynomial_Op<"to_tensor", [Pure]> {
   let hasVerifier = 1;
 }
 
-def Polynomial_AnyPolynomialAttr : AnyAttrOf<[
-  Polynomial_FloatPolynomialAttr,
-  Polynomial_IntPolynomialAttr
+def Polynomial_AnyTypedPolynomialAttr : AnyAttrOf<[
+  Polynomial_TypedFloatPolynomialAttr,
+  Polynomial_TypedIntPolynomialAttr
 ]>;
 
 // Not deriving from Polynomial_Op due to need for custom assembly format
-def Polynomial_ConstantOp : Op<Polynomial_Dialect, "constant", [Pure]> {
+def Polynomial_ConstantOp : Op<Polynomial_Dialect, "constant",
+    [Pure, InferTypeOpAdaptor]> {
   let summary = "Define a constant polynomial via an attribute.";
   let description = [{
     Example:
 
     ```mlir
-    #poly = #polynomial.int_polynomial<x**1024 - 1>
-    #ring = #polynomial.ring<coefficientType=i32, coefficientModulus=65536:i32, polynomialModulus=#poly>
-    %0 = polynomial.constant #polynomial.int_polynomial<1 + x**2> : !polynomial.polynomial<#ring>
+    !int_poly_ty = !polynomial.polynomial<ring=<coefficientType=i32>>
+    %0 = polynomial.constant int<1 + x**2> : !int_poly_ty
 
-    #float_ring = #polynomial.ring<coefficientType=f32>
-    %0 = polynomial.constant #polynomial.float_polynomial<0.5 + 1.3e06 x**2> : !polynomial.polynomial<#float_ring>
+    !float_poly_ty = !polynomial.polynomial<ring=<coefficientType=f32>>
+    %1 = polynomial.constant float<0.5 + 1.3e06 x**2> : !float_poly_ty
     ```
   }];
-  let arguments = (ins Polynomial_AnyPolynomialAttr:$value);
+  let arguments = (ins Polynomial_AnyTypedPolynomialAttr:$value);
   let results = (outs Polynomial_PolynomialType:$output);
-  let assemblyFormat = "attr-dict `:` type($output)";
+  let hasCustomAssemblyFormat = 1;
 }
 
 def Polynomial_NTTOp : Polynomial_Op<"ntt", [Pure]> {

mlir/include/mlir/Dialect/Polynomial/IR/PolynomialAttributes.td

@@ -18,7 +18,7 @@ class Polynomial_Attr<string name, string attrMnemonic, list<Trait> traits = []>
 }
 
 def Polynomial_IntPolynomialAttr : Polynomial_Attr<"IntPolynomial", "int_polynomial"> {
-  let summary = "An attribute containing a single-variable polynomial with integer coefficients.";
+  let summary = "an attribute containing a single-variable polynomial with integer coefficients";
   let description = [{
     A polynomial attribute represents a single-variable polynomial with integer
     coefficients, which is used to define the modulus of a `RingAttr`, as well
@@ -41,7 +41,7 @@ def Polynomial_IntPolynomialAttr : Polynomial_Attr<"IntPolynomial", "int_polynom
 }
 
 def Polynomial_FloatPolynomialAttr : Polynomial_Attr<"FloatPolynomial", "float_polynomial"> {
-  let summary = "An attribute containing a single-variable polynomial with double precision floating point coefficients.";
+  let summary = "an attribute containing a single-variable polynomial with double precision floating point coefficients";
   let description = [{
     A polynomial attribute represents a single-variable polynomial with double
     precision floating point coefficients.
@@ -62,8 +62,72 @@ def Polynomial_FloatPolynomialAttr : Polynomial_Attr<"FloatPolynomial", "float_p
   let hasCustomAssemblyFormat = 1;
 }
 
+def Polynomial_TypedIntPolynomialAttr : Polynomial_Attr<
+    "TypedIntPolynomial", "typed_int_polynomial", [TypedAttrInterface]> {
+  let summary = "a typed int_polynomial";
+  let description = [{
+    Example:
+
+    ```mlir
+    !poly_ty = !polynomial.polynomial<ring=<coefficientType=i32>>
+    #poly = int<1 x**7 + 4> : !poly_ty
+    #poly_verbose = #polynomial.typed_int_polynomial<1 x**7 + 4> : !poly_ty
+    ```
+  }];
+  let parameters = (ins "::mlir::Type":$type, "::mlir::polynomial::IntPolynomialAttr":$value);
+  let assemblyFormat = "$value `:` $type";
+  let builders = [
+    AttrBuilderWithInferredContext<(ins "Type":$type,
+                                        "const IntPolynomial &":$value), [{
+      return $_get(
+        type.getContext(),
+        type,
+        IntPolynomialAttr::get(type.getContext(), value));
+    }]>,
+    AttrBuilderWithInferredContext<(ins "Type":$type,
+                                        "const Attribute &":$value), [{
+      return $_get(type.getContext(), type, ::llvm::cast<IntPolynomialAttr>(value));
+    }]>
+  ];
+  let extraClassDeclaration = [{
+    using ValueType = ::mlir::Attribute;
+  }];
+}
+
+def Polynomial_TypedFloatPolynomialAttr : Polynomial_Attr<
+    "TypedFloatPolynomial", "typed_float_polynomial", [TypedAttrInterface]> {
+  let summary = "a typed float_polynomial";
+  let description = [{
+    Example:
+
+    ```mlir
+    !poly_ty = !polynomial.polynomial<ring=<coefficientType=f32>>
+    #poly = float<1.4 x**7 + 4.5> : !poly_ty
+    #poly_verbose = #polynomial.typed_float_polynomial<1.4 x**7 + 4.5> : !poly_ty
+    ```
+  }];
+  let parameters = (ins "::mlir::Type":$type, "::mlir::polynomial::FloatPolynomialAttr":$value);
+  let assemblyFormat = "$value `:` $type";
+  let builders = [
+    AttrBuilderWithInferredContext<(ins "Type":$type,
+                                        "const FloatPolynomial &":$value), [{
+      return $_get(
+        type.getContext(),
+        type,
+        FloatPolynomialAttr::get(type.getContext(), value));
+    }]>,
+    AttrBuilderWithInferredContext<(ins "Type":$type,
+                                        "const Attribute &":$value), [{
+      return $_get(type.getContext(), type, ::llvm::cast<FloatPolynomialAttr>(value));
+    }]>
+  ];
+  let extraClassDeclaration = [{
+    using ValueType = ::mlir::Attribute;
+  }];
+}
+
 def Polynomial_RingAttr : Polynomial_Attr<"Ring", "ring"> {
-  let summary = "An attribute specifying a polynomial ring.";
+  let summary = "an attribute specifying a polynomial ring";
   let description = [{
     A ring describes the domain in which polynomial arithmetic occurs. The ring
     attribute in `polynomial` represents the more specific case of polynomials

mlir/lib/Dialect/Polynomial/IR/PolynomialAttributes.cpp

@@ -101,7 +101,7 @@ parseMonomial(AsmParser &parser, Monomial &monomial, llvm::StringRef &variable,
   return success();
 }
 
-template <typename PolynoimalAttrTy, typename Monomial>
+template <typename Monomial>
 LogicalResult
 parsePolynomialAttr(AsmParser &parser, llvm::SmallVector<Monomial> &monomials,
                     llvm::StringSet<> &variables,
@@ -155,7 +155,7 @@ Attribute IntPolynomialAttr::parse(AsmParser &parser, Type type) {
   llvm::SmallVector<IntMonomial> monomials;
   llvm::StringSet<> variables;
 
-  if (failed(parsePolynomialAttr<IntPolynomialAttr, IntMonomial>(
+  if (failed(parsePolynomialAttr<IntMonomial>(
           parser, monomials, variables,
           [&](IntMonomial &monomial) -> OptionalParseResult {
             APInt parsedCoeff(apintBitWidth, 1);
@@ -175,7 +175,6 @@ Attribute IntPolynomialAttr::parse(AsmParser &parser, Type type) {
   }
   return IntPolynomialAttr::get(parser.getContext(), result.value());
 }
-
 Attribute FloatPolynomialAttr::parse(AsmParser &parser, Type type) {
   if (failed(parser.parseLess()))
     return {};
@@ -191,8 +190,8 @@ Attribute FloatPolynomialAttr::parse(AsmParser &parser, Type type) {
     return OptionalParseResult(result);
   };
 
-  if (failed(parsePolynomialAttr<FloatPolynomialAttr, FloatMonomial>(
-          parser, monomials, variables, parseAndStoreCoefficient))) {
+  if (failed(parsePolynomialAttr<FloatMonomial>(parser, monomials, variables,
+                                                parseAndStoreCoefficient))) {
     return {};
   }
 

mlir/lib/Dialect/Polynomial/IR/PolynomialOps.cpp

@@ -186,6 +186,88 @@ LogicalResult INTTOp::verify() {
   return verifyNTTOp(this->getOperation(), ring, tensorType);
 }
 
+ParseResult ConstantOp::parse(OpAsmParser &parser, OperationState &result) {
+  // Using the built-in parser.parseAttribute requires the full
+  // #polynomial.typed_int_polynomial syntax, which is excessive.
+  // Instead we parse a keyword int to signal it's an integer polynomial
+  Type type;
+  if (succeeded(parser.parseOptionalKeyword("float"))) {
+    Attribute floatPolyAttr = FloatPolynomialAttr::parse(parser, nullptr);
+    if (floatPolyAttr) {
+      if (parser.parseColon() || parser.parseType(type))
+        return failure();
+      result.addAttribute("value",
+                          TypedFloatPolynomialAttr::get(type, floatPolyAttr));
+      result.addTypes(type);
+      return success();
+    }
+  }
+
+  if (succeeded(parser.parseOptionalKeyword("int"))) {
+    Attribute intPolyAttr = IntPolynomialAttr::parse(parser, nullptr);
+    if (intPolyAttr) {
+      if (parser.parseColon() || parser.parseType(type))
+        return failure();
+
+      result.addAttribute("value",
+                          TypedIntPolynomialAttr::get(type, intPolyAttr));
+      result.addTypes(type);
+      return success();
+    }
+  }
+
+  // In the worst case, still accept the verbose versions.
+  TypedIntPolynomialAttr typedIntPolyAttr;
+  OptionalParseResult res =
+      parser.parseOptionalAttribute<TypedIntPolynomialAttr>(
+          typedIntPolyAttr, "value", result.attributes);
+  if (res.has_value() && succeeded(res.value())) {
+    result.addTypes(typedIntPolyAttr.getType());
+    return success();
+  }
+
+  TypedFloatPolynomialAttr typedFloatPolyAttr;
+  res = parser.parseAttribute<TypedFloatPolynomialAttr>(
+      typedFloatPolyAttr, "value", result.attributes);
+  if (res.has_value() && succeeded(res.value())) {
+    result.addTypes(typedFloatPolyAttr.getType());
+    return success();
+  }
+
+  return failure();
+}
+
+void ConstantOp::print(OpAsmPrinter &p) {
+  p << " ";
+  if (auto intPoly = dyn_cast<TypedIntPolynomialAttr>(getValue())) {
+    p << "int";
+    intPoly.getValue().print(p);
+  } else if (auto floatPoly = dyn_cast<TypedFloatPolynomialAttr>(getValue())) {
+    p << "float";
+    floatPoly.getValue().print(p);
+  } else {
+    assert(false && "unexpected attribute type");
+  }
+  p << " : ";
+  p.printType(getOutput().getType());
+}
+
+LogicalResult ConstantOp::inferReturnTypes(
+    MLIRContext *context, std::optional<mlir::Location> location,
+    ConstantOp::Adaptor adaptor,
+    llvm::SmallVectorImpl<mlir::Type> &inferredReturnTypes) {
+  Attribute operand = adaptor.getValue();
+  if (auto intPoly = dyn_cast<TypedIntPolynomialAttr>(operand)) {
+    inferredReturnTypes.push_back(intPoly.getType());
+  } else if (auto floatPoly = dyn_cast<TypedFloatPolynomialAttr>(operand)) {
+    inferredReturnTypes.push_back(floatPoly.getType());
+  } else {
+    assert(false && "unexpected attribute type");
+    return failure();
+  }
+  return success();
+}
+
 //===----------------------------------------------------------------------===//
 // TableGen'd canonicalization patterns
 //===----------------------------------------------------------------------===//

mlir/test/Dialect/Polynomial/ops.mlir

@@ -74,15 +74,19 @@ module {
 
   func.func @test_monic_monomial_mul() {
     %five = arith.constant 5 : index
-    %0 = polynomial.constant {value=#one_plus_x_squared} : !polynomial.polynomial<ring=#ring1>
+    %0 = polynomial.constant int<1 + x**2> : !polynomial.polynomial<ring=#ring1>
     %1 = polynomial.monic_monomial_mul %0, %five : (!polynomial.polynomial<ring=#ring1>, index) -> !polynomial.polynomial<ring=#ring1>
     return
   }
 
   func.func @test_constant() {
-    %0 = polynomial.constant {value=#one_plus_x_squared} : !polynomial.polynomial<ring=#ring1>
-    %1 = polynomial.constant {value=#polynomial.int_polynomial<1 + x**2>} : !polynomial.polynomial<ring=#ring1>
-    %2 = polynomial.constant {value=#polynomial.float_polynomial<1.5 + 0.5 x**2>} : !polynomial.polynomial<ring=#ring2>
+    %0 = polynomial.constant int<1 + x**2> : !polynomial.polynomial<ring=#ring1>
+    %1 = polynomial.constant int<1 + x**2> : !polynomial.polynomial<ring=#ring1>
+    %2 = polynomial.constant float<1.5 + 0.5 x**2> : !polynomial.polynomial<ring=#ring2>
+
+    // Test verbose fallbacks
+    %verb0 = polynomial.constant #polynomial.typed_int_polynomial<1 + x**2> : !polynomial.polynomial<ring=#ring1>
+    %verb2 = polynomial.constant #polynomial.typed_float_polynomial<1.5 + 0.5 x**2> : !polynomial.polynomial<ring=#ring2>
     return
   }