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llvm / llvm-project / 15d1ee36720ff24323f55452ae3cfb63f318c3f3 / . / mlir / tools / mlir-tblgen / OpFormatGen.cpp
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//===- OpFormatGen.cpp - MLIR operation asm format generator --------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "OpFormatGen.h"
#include "mlir/Support/LogicalResult.h"
#include "mlir/TableGen/Format.h"
#include "mlir/TableGen/GenInfo.h"
#include "mlir/TableGen/Interfaces.h"
#include "mlir/TableGen/OpClass.h"
#include "mlir/TableGen/OpTrait.h"
#include "mlir/TableGen/Operator.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/Sequence.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallBitVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/TypeSwitch.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Signals.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
#define DEBUG_TYPE "mlir-tblgen-opformatgen"
using namespace mlir;
using namespace mlir::tblgen;
static llvm::cl::opt<bool> formatErrorIsFatal(
"asmformat-error-is-fatal",
llvm::cl::desc("Emit a fatal error if format parsing fails"),
llvm::cl::init(true));
/// Returns true if the given string can be formatted as a keyword.
static bool canFormatStringAsKeyword(StringRef value) {
if (!isalpha(value.front()) && value.front() != '_')
return false;
return llvm::all_of(value.drop_front(), [](char c) {
return isalnum(c) || c == '_' || c == '$' || c == '.';
});
}
//===----------------------------------------------------------------------===//
// Element
//===----------------------------------------------------------------------===//
namespace {
/// This class represents a single format element.
class Element {
public:
enum class Kind {
/// This element is a directive.
AttrDictDirective,
CustomDirective,
FunctionalTypeDirective,
OperandsDirective,
RegionsDirective,
ResultsDirective,
SuccessorsDirective,
TypeDirective,
TypeRefDirective,
/// This element is a literal.
Literal,
/// This element is a whitespace.
Newline,
Space,
/// This element is an variable value.
AttributeVariable,
OperandVariable,
RegionVariable,
ResultVariable,
SuccessorVariable,
/// This element is an optional element.
Optional,
};
Element(Kind kind) : kind(kind) {}
virtual ~Element() = default;
/// Return the kind of this element.
Kind getKind() const { return kind; }
private:
/// The kind of this element.
Kind kind;
};
} // namespace
//===----------------------------------------------------------------------===//
// VariableElement
namespace {
/// This class represents an instance of an variable element. A variable refers
/// to something registered on the operation itself, e.g. an argument, result,
/// etc.
template <typename VarT, Element::Kind kindVal>
class VariableElement : public Element {
public:
VariableElement(const VarT *var) : Element(kindVal), var(var) {}
static bool classof(const Element *element) {
return element->getKind() == kindVal;
}
const VarT *getVar() { return var; }
protected:
const VarT *var;
};
/// This class represents a variable that refers to an attribute argument.
struct AttributeVariable
: public VariableElement<NamedAttribute, Element::Kind::AttributeVariable> {
using VariableElement<NamedAttribute,
Element::Kind::AttributeVariable>::VariableElement;
/// Return the constant builder call for the type of this attribute, or None
/// if it doesn't have one.
Optional<StringRef> getTypeBuilder() const {
Optional<Type> attrType = var->attr.getValueType();
return attrType ? attrType->getBuilderCall() : llvm::None;
}
/// Return if this attribute refers to a UnitAttr.
bool isUnitAttr() const {
return var->attr.getBaseAttr().getAttrDefName() == "UnitAttr";
}
};
/// This class represents a variable that refers to an operand argument.
using OperandVariable =
VariableElement<NamedTypeConstraint, Element::Kind::OperandVariable>;
/// This class represents a variable that refers to a region.
using RegionVariable =
VariableElement<NamedRegion, Element::Kind::RegionVariable>;
/// This class represents a variable that refers to a result.
using ResultVariable =
VariableElement<NamedTypeConstraint, Element::Kind::ResultVariable>;
/// This class represents a variable that refers to a successor.
using SuccessorVariable =
VariableElement<NamedSuccessor, Element::Kind::SuccessorVariable>;
} // end anonymous namespace
//===----------------------------------------------------------------------===//
// DirectiveElement
namespace {
/// This class implements single kind directives.
template <Element::Kind type>
class DirectiveElement : public Element {
public:
DirectiveElement() : Element(type){};
static bool classof(const Element *ele) { return ele->getKind() == type; }
};
/// This class represents the `operands` directive. This directive represents
/// all of the operands of an operation.
using OperandsDirective = DirectiveElement<Element::Kind::OperandsDirective>;
/// This class represents the `regions` directive. This directive represents
/// all of the regions of an operation.
using RegionsDirective = DirectiveElement<Element::Kind::RegionsDirective>;
/// This class represents the `results` directive. This directive represents
/// all of the results of an operation.
using ResultsDirective = DirectiveElement<Element::Kind::ResultsDirective>;
/// This class represents the `successors` directive. This directive represents
/// all of the successors of an operation.
using SuccessorsDirective =
DirectiveElement<Element::Kind::SuccessorsDirective>;
/// This class represents the `attr-dict` directive. This directive represents
/// the attribute dictionary of the operation.
class AttrDictDirective
: public DirectiveElement<Element::Kind::AttrDictDirective> {
public:
explicit AttrDictDirective(bool withKeyword) : withKeyword(withKeyword) {}
bool isWithKeyword() const { return withKeyword; }
private:
/// If the dictionary should be printed with the 'attributes' keyword.
bool withKeyword;
};
/// This class represents a custom format directive that is implemented by the
/// user in C++.
class CustomDirective : public Element {
public:
CustomDirective(StringRef name,
std::vector<std::unique_ptr<Element>> &&arguments)
: Element{Kind::CustomDirective}, name(name),
arguments(std::move(arguments)) {}
static bool classof(const Element *element) {
return element->getKind() == Kind::CustomDirective;
}
/// Return the name of this optional element.
StringRef getName() const { return name; }
/// Return the arguments to the custom directive.
auto getArguments() const { return llvm::make_pointee_range(arguments); }
private:
/// The user provided name of the directive.
StringRef name;
/// The arguments to the custom directive.
std::vector<std::unique_ptr<Element>> arguments;
};
/// This class represents the `functional-type` directive. This directive takes
/// two arguments and formats them, respectively, as the inputs and results of a
/// FunctionType.
class FunctionalTypeDirective
: public DirectiveElement<Element::Kind::FunctionalTypeDirective> {
public:
FunctionalTypeDirective(std::unique_ptr<Element> inputs,
std::unique_ptr<Element> results)
: inputs(std::move(inputs)), results(std::move(results)) {}
Element *getInputs() const { return inputs.get(); }
Element *getResults() const { return results.get(); }
private:
/// The input and result arguments.
std::unique_ptr<Element> inputs, results;
};
/// This class represents the `type` directive.
class TypeDirective : public DirectiveElement<Element::Kind::TypeDirective> {
public:
TypeDirective(std::unique_ptr<Element> arg) : operand(std::move(arg)) {}
Element *getOperand() const { return operand.get(); }
private:
/// The operand that is used to format the directive.
std::unique_ptr<Element> operand;
};
/// This class represents the `type_ref` directive.
class TypeRefDirective
: public DirectiveElement<Element::Kind::TypeRefDirective> {
public:
TypeRefDirective(std::unique_ptr<Element> arg) : operand(std::move(arg)) {}
Element *getOperand() const { return operand.get(); }
private:
/// The operand that is used to format the directive.
std::unique_ptr<Element> operand;
};
} // namespace
//===----------------------------------------------------------------------===//
// LiteralElement
namespace {
/// This class represents an instance of a literal element.
class LiteralElement : public Element {
public:
LiteralElement(StringRef literal)
: Element{Kind::Literal}, literal(literal) {}
static bool classof(const Element *element) {
return element->getKind() == Kind::Literal;
}
/// Return the literal for this element.
StringRef getLiteral() const { return literal; }
/// Returns true if the given string is a valid literal.
static bool isValidLiteral(StringRef value);
private:
/// The spelling of the literal for this element.
StringRef literal;
};
} // end anonymous namespace
bool LiteralElement::isValidLiteral(StringRef value) {
if (value.empty())
return false;
char front = value.front();
// If there is only one character, this must either be punctuation or a
// single character bare identifier.
if (value.size() == 1)
return isalpha(front) || StringRef("_:,=<>()[]{}?+*").contains(front);
// Check the punctuation that are larger than a single character.
if (value == "->")
return true;
// Otherwise, this must be an identifier.
return canFormatStringAsKeyword(value);
}
//===----------------------------------------------------------------------===//
// WhitespaceElement
namespace {
/// This class represents a whitespace element, e.g. newline or space. It's a
/// literal that is printed but never parsed.
class WhitespaceElement : public Element {
public:
WhitespaceElement(Kind kind) : Element{kind} {}
static bool classof(const Element *element) {
Kind kind = element->getKind();
return kind == Kind::Newline || kind == Kind::Space;
}
};
/// This class represents an instance of a newline element. It's a literal that
/// prints a newline. It is ignored by the parser.
class NewlineElement : public WhitespaceElement {
public:
NewlineElement() : WhitespaceElement(Kind::Newline) {}
static bool classof(const Element *element) {
return element->getKind() == Kind::Newline;
}
};
/// This class represents an instance of a space element. It's a literal that
/// prints or omits printing a space. It is ignored by the parser.
class SpaceElement : public WhitespaceElement {
public:
SpaceElement(bool value) : WhitespaceElement(Kind::Space), value(value) {}
static bool classof(const Element *element) {
return element->getKind() == Kind::Space;
}
/// Returns true if this element should print as a space. Otherwise, the
/// element should omit printing a space between the surrounding elements.
bool getValue() const { return value; }
private:
bool value;
};
} // end anonymous namespace
//===----------------------------------------------------------------------===//
// OptionalElement
namespace {
/// This class represents a group of elements that are optionally emitted based
/// upon an optional variable of the operation.
class OptionalElement : public Element {
public:
OptionalElement(std::vector<std::unique_ptr<Element>> &&elements,
unsigned anchor, unsigned parseStart)
: Element{Kind::Optional}, elements(std::move(elements)), anchor(anchor),
parseStart(parseStart) {}
static bool classof(const Element *element) {
return element->getKind() == Kind::Optional;
}
/// Return the nested elements of this grouping.
auto getElements() const { return llvm::make_pointee_range(elements); }
/// Return the anchor of this optional group.
Element *getAnchor() const { return elements[anchor].get(); }
/// Return the index of the first element that needs to be parsed.
unsigned getParseStart() const { return parseStart; }
private:
/// The child elements of this optional.
std::vector<std::unique_ptr<Element>> elements;
/// The index of the element that acts as the anchor for the optional group.
unsigned anchor;
/// The index of the first element that is parsed (is not a
/// WhitespaceElement).
unsigned parseStart;
};
} // end anonymous namespace
//===----------------------------------------------------------------------===//
// OperationFormat
//===----------------------------------------------------------------------===//
namespace {
using ConstArgument =
llvm::PointerUnion<const NamedAttribute *, const NamedTypeConstraint *>;
struct OperationFormat {
/// This class represents a specific resolver for an operand or result type.
class TypeResolution {
public:
TypeResolution() = default;
/// Get the index into the buildable types for this type, or None.
Optional<int> getBuilderIdx() const { return builderIdx; }
void setBuilderIdx(int idx) { builderIdx = idx; }
/// Get the variable this type is resolved to, or nullptr.
const NamedTypeConstraint *getVariable() const {
return resolver.dyn_cast<const NamedTypeConstraint *>();
}
/// Get the attribute this type is resolved to, or nullptr.
const NamedAttribute *getAttribute() const {
return resolver.dyn_cast<const NamedAttribute *>();
}
/// Get the transformer for the type of the variable, or None.
Optional<StringRef> getVarTransformer() const {
return variableTransformer;
}
void setResolver(ConstArgument arg, Optional<StringRef> transformer) {
resolver = arg;
variableTransformer = transformer;
assert(getVariable() || getAttribute());
}
private:
/// If the type is resolved with a buildable type, this is the index into
/// 'buildableTypes' in the parent format.
Optional<int> builderIdx;
/// If the type is resolved based upon another operand or result, this is
/// the variable or the attribute that this type is resolved to.
ConstArgument resolver;
/// If the type is resolved based upon another operand or result, this is
/// a transformer to apply to the variable when resolving.
Optional<StringRef> variableTransformer;
};
OperationFormat(const Operator &op)
: allOperands(false), allOperandTypes(false), allResultTypes(false) {
operandTypes.resize(op.getNumOperands(), TypeResolution());
resultTypes.resize(op.getNumResults(), TypeResolution());
hasImplicitTermTrait =
llvm::any_of(op.getTraits(), [](const OpTrait &trait) {
return trait.getDef().isSubClassOf("SingleBlockImplicitTerminator");
});
}
/// Generate the operation parser from this format.
void genParser(Operator &op, OpClass &opClass);
/// Generate the parser code for a specific format element.
void genElementParser(Element *element, OpMethodBody &body,
FmtContext &attrTypeCtx);
/// Generate the c++ to resolve the types of operands and results during
/// parsing.
void genParserTypeResolution(Operator &op, OpMethodBody &body);
/// Generate the c++ to resolve regions during parsing.
void genParserRegionResolution(Operator &op, OpMethodBody &body);
/// Generate the c++ to resolve successors during parsing.
void genParserSuccessorResolution(Operator &op, OpMethodBody &body);
/// Generate the c++ to handling variadic segment size traits.
void genParserVariadicSegmentResolution(Operator &op, OpMethodBody &body);
/// Generate the operation printer from this format.
void genPrinter(Operator &op, OpClass &opClass);
/// Generate the printer code for a specific format element.
void genElementPrinter(Element *element, OpMethodBody &body, Operator &op,
bool &shouldEmitSpace, bool &lastWasPunctuation);
/// The various elements in this format.
std::vector<std::unique_ptr<Element>> elements;
/// A flag indicating if all operand/result types were seen. If the format
/// contains these, it can not contain individual type resolvers.
bool allOperands, allOperandTypes, allResultTypes;
/// A flag indicating if this operation has the SingleBlockImplicitTerminator
/// trait.
bool hasImplicitTermTrait;
/// A map of buildable types to indices.
llvm::MapVector<StringRef, int, llvm::StringMap<int>> buildableTypes;
/// The index of the buildable type, if valid, for every operand and result.
std::vector<TypeResolution> operandTypes, resultTypes;
/// The set of attributes explicitly used within the format.
SmallVector<const NamedAttribute *, 8> usedAttributes;
};
} // end anonymous namespace
//===----------------------------------------------------------------------===//
// Parser Gen
/// Returns true if we can format the given attribute as an EnumAttr in the
/// parser format.
static bool canFormatEnumAttr(const NamedAttribute *attr) {
Attribute baseAttr = attr->attr.getBaseAttr();
const EnumAttr *enumAttr = dyn_cast<EnumAttr>(&baseAttr);
if (!enumAttr)
return false;
// The attribute must have a valid underlying type and a constant builder.
return !enumAttr->getUnderlyingType().empty() &&
!enumAttr->getConstBuilderTemplate().empty();
}
/// Returns if we should format the given attribute as an SymbolNameAttr.
static bool shouldFormatSymbolNameAttr(const NamedAttribute *attr) {
return attr->attr.getBaseAttr().getAttrDefName() == "SymbolNameAttr";
}
/// The code snippet used to generate a parser call for an attribute.
///
/// {0}: The name of the attribute.
/// {1}: The type for the attribute.
const char *const attrParserCode = R"(
if (parser.parseAttribute({0}Attr{1}, "{0}", result.attributes))
return ::mlir::failure();
)";
const char *const optionalAttrParserCode = R"(
{
::mlir::OptionalParseResult parseResult =
parser.parseOptionalAttribute({0}Attr{1}, "{0}", result.attributes);
if (parseResult.hasValue() && failed(*parseResult))
return ::mlir::failure();
}
)";
/// The code snippet used to generate a parser call for a symbol name attribute.
///
/// {0}: The name of the attribute.
const char *const symbolNameAttrParserCode = R"(
if (parser.parseSymbolName({0}Attr, "{0}", result.attributes))
return ::mlir::failure();
)";
const char *const optionalSymbolNameAttrParserCode = R"(
// Parsing an optional symbol name doesn't fail, so no need to check the
// result.
(void)parser.parseOptionalSymbolName({0}Attr, "{0}", result.attributes);
)";
/// The code snippet used to generate a parser call for an enum attribute.
///
/// {0}: The name of the attribute.
/// {1}: The c++ namespace for the enum symbolize functions.
/// {2}: The function to symbolize a string of the enum.
/// {3}: The constant builder call to create an attribute of the enum type.
/// {4}: The set of allowed enum keywords.
/// {5}: The error message on failure when the enum isn't present.
const char *const enumAttrParserCode = R"(
{
::llvm::StringRef attrStr;
::mlir::NamedAttrList attrStorage;
auto loc = parser.getCurrentLocation();
if (parser.parseOptionalKeyword(&attrStr, {4})) {
::mlir::StringAttr attrVal;
::mlir::OptionalParseResult parseResult =
parser.parseOptionalAttribute(attrVal,
parser.getBuilder().getNoneType(),
"{0}", attrStorage);
if (parseResult.hasValue()) {{
if (failed(*parseResult))
return ::mlir::failure();
attrStr = attrVal.getValue();
} else {
{5}
}
}
if (!attrStr.empty()) {
auto attrOptional = {1}::{2}(attrStr);
if (!attrOptional)
return parser.emitError(loc, "invalid ")
<< "{0} attribute specification: \"" << attrStr << '"';;
{0}Attr = {3};
result.addAttribute("{0}", {0}Attr);
}
}
)";
/// The code snippet used to generate a parser call for an operand.
///
/// {0}: The name of the operand.
const char *const variadicOperandParserCode = R"(
{0}OperandsLoc = parser.getCurrentLocation();
if (parser.parseOperandList({0}Operands))
return ::mlir::failure();
)";
const char *const optionalOperandParserCode = R"(
{
{0}OperandsLoc = parser.getCurrentLocation();
::mlir::OpAsmParser::OperandType operand;
::mlir::OptionalParseResult parseResult =
parser.parseOptionalOperand(operand);
if (parseResult.hasValue()) {
if (failed(*parseResult))
return ::mlir::failure();
{0}Operands.push_back(operand);
}
}
)";
const char *const operandParserCode = R"(
{0}OperandsLoc = parser.getCurrentLocation();
if (parser.parseOperand({0}RawOperands[0]))
return ::mlir::failure();
)";
/// The code snippet used to generate a parser call for a type list.
///
/// {0}: The name for the type list.
const char *const variadicTypeParserCode = R"(
if (parser.parseTypeList({0}Types))
return ::mlir::failure();
)";
const char *const optionalTypeParserCode = R"(
{
::mlir::Type optionalType;
::mlir::OptionalParseResult parseResult =
parser.parseOptionalType(optionalType);
if (parseResult.hasValue()) {
if (failed(*parseResult))
return ::mlir::failure();
{0}Types.push_back(optionalType);
}
}
)";
const char *const typeParserCode = R"(
if (parser.parseType({0}RawTypes[0]))
return ::mlir::failure();
)";
/// The code snippet used to generate a parser call for a functional type.
///
/// {0}: The name for the input type list.
/// {1}: The name for the result type list.
const char *const functionalTypeParserCode = R"(
::mlir::FunctionType {0}__{1}_functionType;
if (parser.parseType({0}__{1}_functionType))
return ::mlir::failure();
{0}Types = {0}__{1}_functionType.getInputs();
{1}Types = {0}__{1}_functionType.getResults();
)";
/// The code snippet used to generate a parser call for a region list.
///
/// {0}: The name for the region list.
const char *regionListParserCode = R"(
{
std::unique_ptr<::mlir::Region> region;
auto firstRegionResult = parser.parseOptionalRegion(region);
if (firstRegionResult.hasValue()) {
if (failed(*firstRegionResult))
return ::mlir::failure();
{0}Regions.emplace_back(std::move(region));
// Parse any trailing regions.
while (succeeded(parser.parseOptionalComma())) {
region = std::make_unique<::mlir::Region>();
if (parser.parseRegion(*region))
return ::mlir::failure();
{0}Regions.emplace_back(std::move(region));
}
}
}
)";
/// The code snippet used to ensure a list of regions have terminators.
///
/// {0}: The name of the region list.
const char *regionListEnsureTerminatorParserCode = R"(
for (auto &region : {0}Regions)
ensureTerminator(*region, parser.getBuilder(), result.location);
)";
/// The code snippet used to generate a parser call for an optional region.
///
/// {0}: The name of the region.
const char *optionalRegionParserCode = R"(
{
auto parseResult = parser.parseOptionalRegion(*{0}Region);
if (parseResult.hasValue() && failed(*parseResult))
return ::mlir::failure();
}
)";
/// The code snippet used to generate a parser call for a region.
///
/// {0}: The name of the region.
const char *regionParserCode = R"(
if (parser.parseRegion(*{0}Region))
return ::mlir::failure();
)";
/// The code snippet used to ensure a region has a terminator.
///
/// {0}: The name of the region.
const char *regionEnsureTerminatorParserCode = R"(
ensureTerminator(*{0}Region, parser.getBuilder(), result.location);
)";
/// The code snippet used to generate a parser call for a successor list.
///
/// {0}: The name for the successor list.
const char *successorListParserCode = R"(
{
::mlir::Block *succ;
auto firstSucc = parser.parseOptionalSuccessor(succ);
if (firstSucc.hasValue()) {
if (failed(*firstSucc))
return ::mlir::failure();
{0}Successors.emplace_back(succ);
// Parse any trailing successors.
while (succeeded(parser.parseOptionalComma())) {
if (parser.parseSuccessor(succ))
return ::mlir::failure();
{0}Successors.emplace_back(succ);
}
}
}
)";
/// The code snippet used to generate a parser call for a successor.
///
/// {0}: The name of the successor.
const char *successorParserCode = R"(
if (parser.parseSuccessor({0}Successor))
return ::mlir::failure();
)";
namespace {
/// The type of length for a given parse argument.
enum class ArgumentLengthKind {
/// The argument is variadic, and may contain 0->N elements.
Variadic,
/// The argument is optional, and may contain 0 or 1 elements.
Optional,
/// The argument is a single element, i.e. always represents 1 element.
Single
};
} // end anonymous namespace
/// Get the length kind for the given constraint.
static ArgumentLengthKind
getArgumentLengthKind(const NamedTypeConstraint *var) {
if (var->isOptional())
return ArgumentLengthKind::Optional;
if (var->isVariadic())
return ArgumentLengthKind::Variadic;
return ArgumentLengthKind::Single;
}
/// Get the name used for the type list for the given type directive operand.
/// 'lengthKind' to the corresponding kind for the given argument.
static StringRef getTypeListName(Element *arg, ArgumentLengthKind &lengthKind) {
if (auto *operand = dyn_cast<OperandVariable>(arg)) {
lengthKind = getArgumentLengthKind(operand->getVar());
return operand->getVar()->name;
}
if (auto *result = dyn_cast<ResultVariable>(arg)) {
lengthKind = getArgumentLengthKind(result->getVar());
return result->getVar()->name;
}
lengthKind = ArgumentLengthKind::Variadic;
if (isa<OperandsDirective>(arg))
return "allOperand";
if (isa<ResultsDirective>(arg))
return "allResult";
llvm_unreachable("unknown 'type' directive argument");
}
/// Generate the parser for a literal value.
static void genLiteralParser(StringRef value, OpMethodBody &body) {
// Handle the case of a keyword/identifier.
if (value.front() == '_' || isalpha(value.front())) {
body << "Keyword(\"" << value << "\")";
return;
}
body << (StringRef)StringSwitch<StringRef>(value)
.Case("->", "Arrow()")
.Case(":", "Colon()")
.Case(",", "Comma()")
.Case("=", "Equal()")
.Case("<", "Less()")
.Case(">", "Greater()")
.Case("{", "LBrace()")
.Case("}", "RBrace()")
.Case("(", "LParen()")
.Case(")", "RParen()")
.Case("[", "LSquare()")
.Case("]", "RSquare()")
.Case("?", "Question()")
.Case("+", "Plus()")
.Case("*", "Star()");
}
/// Generate the storage code required for parsing the given element.
static void genElementParserStorage(Element *element, OpMethodBody &body) {
if (auto *optional = dyn_cast<OptionalElement>(element)) {
auto elements = optional->getElements();
// If the anchor is a unit attribute, it won't be parsed directly so elide
// it.
auto *anchor = dyn_cast<AttributeVariable>(optional->getAnchor());
Element *elidedAnchorElement = nullptr;
if (anchor && anchor != &*elements.begin() && anchor->isUnitAttr())
elidedAnchorElement = anchor;
for (auto &childElement : elements)
if (&childElement != elidedAnchorElement)
genElementParserStorage(&childElement, body);
} else if (auto *custom = dyn_cast<CustomDirective>(element)) {
for (auto &paramElement : custom->getArguments())
genElementParserStorage(&paramElement, body);
} else if (isa<OperandsDirective>(element)) {
body << " ::mlir::SmallVector<::mlir::OpAsmParser::OperandType, 4> "
"allOperands;\n";
} else if (isa<RegionsDirective>(element)) {
body << " ::llvm::SmallVector<std::unique_ptr<::mlir::Region>, 2> "
"fullRegions;\n";
} else if (isa<SuccessorsDirective>(element)) {
body << " ::llvm::SmallVector<::mlir::Block *, 2> fullSuccessors;\n";
} else if (auto *attr = dyn_cast<AttributeVariable>(element)) {
const NamedAttribute *var = attr->getVar();
body << llvm::formatv(" {0} {1}Attr;\n", var->attr.getStorageType(),
var->name);
} else if (auto *operand = dyn_cast<OperandVariable>(element)) {
StringRef name = operand->getVar()->name;
if (operand->getVar()->isVariableLength()) {
body << " ::mlir::SmallVector<::mlir::OpAsmParser::OperandType, 4> "
<< name << "Operands;\n";
} else {
body << " ::mlir::OpAsmParser::OperandType " << name
<< "RawOperands[1];\n"
<< " ::llvm::ArrayRef<::mlir::OpAsmParser::OperandType> " << name
<< "Operands(" << name << "RawOperands);";
}
body << llvm::formatv(" ::llvm::SMLoc {0}OperandsLoc;\n"
" (void){0}OperandsLoc;\n",
name);
} else if (auto *region = dyn_cast<RegionVariable>(element)) {
StringRef name = region->getVar()->name;
if (region->getVar()->isVariadic()) {
body << llvm::formatv(
" ::llvm::SmallVector<std::unique_ptr<::mlir::Region>, 2> "
"{0}Regions;\n",
name);
} else {
body << llvm::formatv(" std::unique_ptr<::mlir::Region> {0}Region = "
"std::make_unique<::mlir::Region>();\n",
name);
}
} else if (auto *successor = dyn_cast<SuccessorVariable>(element)) {
StringRef name = successor->getVar()->name;
if (successor->getVar()->isVariadic()) {
body << llvm::formatv(" ::llvm::SmallVector<::mlir::Block *, 2> "
"{0}Successors;\n",
name);
} else {
body << llvm::formatv(" ::mlir::Block *{0}Successor = nullptr;\n", name);
}
} else if (auto *dir = dyn_cast<TypeDirective>(element)) {
ArgumentLengthKind lengthKind;
StringRef name = getTypeListName(dir->getOperand(), lengthKind);
if (lengthKind != ArgumentLengthKind::Single)
body << " ::mlir::SmallVector<::mlir::Type, 1> " << name << "Types;\n";
else
body << llvm::formatv(" ::mlir::Type {0}RawTypes[1];\n", name)
<< llvm::formatv(
" ::llvm::ArrayRef<::mlir::Type> {0}Types({0}RawTypes);\n",
name);
} else if (auto *dir = dyn_cast<TypeRefDirective>(element)) {
ArgumentLengthKind lengthKind;
StringRef name = getTypeListName(dir->getOperand(), lengthKind);
// Refer to the previously encountered TypeDirective for name.
// Take a `const ::mlir::SmallVector<::mlir::Type, 1> &` in the declaration
// to properly track the types that will be parsed and pushed later on.
if (lengthKind != ArgumentLengthKind::Single)
body << " const ::mlir::SmallVector<::mlir::Type, 1> &" << name
<< "TypesRef(" << name << "Types);\n";
else
body << llvm::formatv(
" ::llvm::ArrayRef<::mlir::Type> {0}RawTypesRef({0}RawTypes);\n",
name);
} else if (auto *dir = dyn_cast<FunctionalTypeDirective>(element)) {
ArgumentLengthKind ignored;
body << " ::llvm::ArrayRef<::mlir::Type> "
<< getTypeListName(dir->getInputs(), ignored) << "Types;\n";
body << " ::llvm::ArrayRef<::mlir::Type> "
<< getTypeListName(dir->getResults(), ignored) << "Types;\n";
}
}
/// Generate the parser for a parameter to a custom directive.
static void genCustomParameterParser(Element &param, OpMethodBody &body) {
body << ", ";
if (auto *attr = dyn_cast<AttributeVariable>(&param)) {
body << attr->getVar()->name << "Attr";
} else if (isa<AttrDictDirective>(&param)) {
body << "result.attributes";
} else if (auto *operand = dyn_cast<OperandVariable>(&param)) {
StringRef name = operand->getVar()->name;
ArgumentLengthKind lengthKind = getArgumentLengthKind(operand->getVar());
if (lengthKind == ArgumentLengthKind::Variadic)
body << llvm::formatv("{0}Operands", name);
else if (lengthKind == ArgumentLengthKind::Optional)
body << llvm::formatv("{0}Operand", name);
else
body << formatv("{0}RawOperands[0]", name);
} else if (auto *region = dyn_cast<RegionVariable>(&param)) {
StringRef name = region->getVar()->name;
if (region->getVar()->isVariadic())
body << llvm::formatv("{0}Regions", name);
else
body << llvm::formatv("*{0}Region", name);
} else if (auto *successor = dyn_cast<SuccessorVariable>(&param)) {
StringRef name = successor->getVar()->name;
if (successor->getVar()->isVariadic())
body << llvm::formatv("{0}Successors", name);
else
body << llvm::formatv("{0}Successor", name);
} else if (auto *dir = dyn_cast<TypeRefDirective>(&param)) {
ArgumentLengthKind lengthKind;
StringRef listName = getTypeListName(dir->getOperand(), lengthKind);
if (lengthKind == ArgumentLengthKind::Variadic)
body << llvm::formatv("{0}TypesRef", listName);
else if (lengthKind == ArgumentLengthKind::Optional)
body << llvm::formatv("{0}TypeRef", listName);
else
body << formatv("{0}RawTypesRef[0]", listName);
} else if (auto *dir = dyn_cast<TypeDirective>(&param)) {
ArgumentLengthKind lengthKind;
StringRef listName = getTypeListName(dir->getOperand(), lengthKind);
if (lengthKind == ArgumentLengthKind::Variadic)
body << llvm::formatv("{0}Types", listName);
else if (lengthKind == ArgumentLengthKind::Optional)
body << llvm::formatv("{0}Type", listName);
else
body << formatv("{0}RawTypes[0]", listName);
} else {
llvm_unreachable("unknown custom directive parameter");
}
}
/// Generate the parser for a custom directive.
static void genCustomDirectiveParser(CustomDirective *dir, OpMethodBody &body) {
body << " {\n";
// Preprocess the directive variables.
// * Add a local variable for optional operands and types. This provides a
// better API to the user defined parser methods.
// * Set the location of operand variables.
for (Element &param : dir->getArguments()) {
if (auto *operand = dyn_cast<OperandVariable>(&param)) {
body << " " << operand->getVar()->name
<< "OperandsLoc = parser.getCurrentLocation();\n";
if (operand->getVar()->isOptional()) {
body << llvm::formatv(
" llvm::Optional<::mlir::OpAsmParser::OperandType> "
"{0}Operand;\n",
operand->getVar()->name);
}
} else if (auto *dir = dyn_cast<TypeRefDirective>(&param)) {
// Reference to an optional which may or may not have been set.
// Retrieve from vector if not empty.
ArgumentLengthKind lengthKind;
StringRef listName = getTypeListName(dir->getOperand(), lengthKind);
if (lengthKind == ArgumentLengthKind::Optional)
body << llvm::formatv(
" ::mlir::Type {0}TypeRef = {0}TypesRef.empty() "
"? Type() : {0}TypesRef[0];\n",
listName);
} else if (auto *dir = dyn_cast<TypeDirective>(&param)) {
ArgumentLengthKind lengthKind;
StringRef listName = getTypeListName(dir->getOperand(), lengthKind);
if (lengthKind == ArgumentLengthKind::Optional)
body << llvm::formatv(" ::mlir::Type {0}Type;\n", listName);
}
}
body << " if (parse" << dir->getName() << "(parser";
for (Element &param : dir->getArguments())
genCustomParameterParser(param, body);
body << "))\n"
<< " return ::mlir::failure();\n";
// After parsing, add handling for any of the optional constructs.
for (Element &param : dir->getArguments()) {
if (auto *attr = dyn_cast<AttributeVariable>(&param)) {
const NamedAttribute *var = attr->getVar();
if (var->attr.isOptional())
body << llvm::formatv(" if ({0}Attr)\n ", var->name);
body << llvm::formatv(" result.addAttribute(\"{0}\", {0}Attr);\n",
var->name);
} else if (auto *operand = dyn_cast<OperandVariable>(&param)) {
const NamedTypeConstraint *var = operand->getVar();
if (!var->isOptional())
continue;
body << llvm::formatv(" if ({0}Operand.hasValue())\n"
" {0}Operands.push_back(*{0}Operand);\n",
var->name);
} else if (isa<TypeRefDirective>(&param)) {
// In the `type_ref` case, do not parse a new Type that needs to be added.
// Just do nothing here.
} else if (auto *dir = dyn_cast<TypeDirective>(&param)) {
ArgumentLengthKind lengthKind;
StringRef listName = getTypeListName(dir->getOperand(), lengthKind);
if (lengthKind == ArgumentLengthKind::Optional) {
body << llvm::formatv(" if ({0}Type)\n"
" {0}Types.push_back({0}Type);\n",
listName);
}
}
}
body << " }\n";
}
/// Generate the parser for a enum attribute.
static void genEnumAttrParser(const NamedAttribute *var, OpMethodBody &body,
FmtContext &attrTypeCtx) {
Attribute baseAttr = var->attr.getBaseAttr();
const EnumAttr &enumAttr = cast<EnumAttr>(baseAttr);
std::vector<EnumAttrCase> cases = enumAttr.getAllCases();
// Generate the code for building an attribute for this enum.
std::string attrBuilderStr;
{
llvm::raw_string_ostream os(attrBuilderStr);
os << tgfmt(enumAttr.getConstBuilderTemplate(), &attrTypeCtx,
"attrOptional.getValue()");
}
// Build a string containing the cases that can be formatted as a keyword.
std::string validCaseKeywordsStr = "{";
llvm::raw_string_ostream validCaseKeywordsOS(validCaseKeywordsStr);
for (const EnumAttrCase &attrCase : cases)
if (canFormatStringAsKeyword(attrCase.getStr()))
validCaseKeywordsOS << '"' << attrCase.getStr() << "\",";
validCaseKeywordsOS.str().back() = '}';
// If the attribute is not optional, build an error message for the missing
// attribute.
std::string errorMessage;
if (!var->attr.isOptional()) {
llvm::raw_string_ostream errorMessageOS(errorMessage);
errorMessageOS
<< "return parser.emitError(loc, \"expected string or "
"keyword containing one of the following enum values for attribute '"
<< var->name << "' [";
llvm::interleaveComma(cases, errorMessageOS, [&](const auto &attrCase) {
errorMessageOS << attrCase.getStr();
});
errorMessageOS << "]\");";
}
body << formatv(enumAttrParserCode, var->name, enumAttr.getCppNamespace(),
enumAttr.getStringToSymbolFnName(), attrBuilderStr,
validCaseKeywordsStr, errorMessage);
}
void OperationFormat::genParser(Operator &op, OpClass &opClass) {
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
// groupings.
for (auto &element : elements)
genElementParserStorage(&*element, body);
// A format context used when parsing attributes with buildable types.
FmtContext attrTypeCtx;
attrTypeCtx.withBuilder("parser.getBuilder()");
// Generate parsers for each of the elements.
for (auto &element : elements)
genElementParser(element.get(), body, attrTypeCtx);
// Generate the code to resolve the operand/result types and successors now
// that they have been parsed.
genParserTypeResolution(op, body);
genParserRegionResolution(op, body);
genParserSuccessorResolution(op, body);
genParserVariadicSegmentResolution(op, body);
body << " return ::mlir::success();\n";
}
void OperationFormat::genElementParser(Element *element, OpMethodBody &body,
FmtContext &attrTypeCtx) {
/// Optional Group.
if (auto *optional = dyn_cast<OptionalElement>(element)) {
auto elements =
llvm::drop_begin(optional->getElements(), optional->getParseStart());
// Generate a special optional parser for the first element to gate the
// parsing of the rest of the elements.
Element *firstElement = &*elements.begin();
if (auto *attrVar = dyn_cast<AttributeVariable>(firstElement)) {
genElementParser(attrVar, body, attrTypeCtx);
body << " if (" << attrVar->getVar()->name << "Attr) {\n";
} else if (auto *literal = dyn_cast<LiteralElement>(firstElement)) {
body << " if (succeeded(parser.parseOptional";
genLiteralParser(literal->getLiteral(), body);
body << ")) {\n";
} else if (auto *opVar = dyn_cast<OperandVariable>(firstElement)) {
genElementParser(opVar, body, attrTypeCtx);
body << " if (!" << opVar->getVar()->name << "Operands.empty()) {\n";
} else if (auto *regionVar = dyn_cast<RegionVariable>(firstElement)) {
const NamedRegion *region = regionVar->getVar();
if (region->isVariadic()) {
genElementParser(regionVar, body, attrTypeCtx);
body << " if (!" << region->name << "Regions.empty()) {\n";
} else {
body << llvm::formatv(optionalRegionParserCode, region->name);
body << " if (!" << region->name << "Region->empty()) {\n ";
if (hasImplicitTermTrait)
body << llvm::formatv(regionEnsureTerminatorParserCode, region->name);
}
}
// If the anchor is a unit attribute, we don't need to print it. When
// parsing, we will add this attribute if this group is present.
Element *elidedAnchorElement = nullptr;
auto *anchorAttr = dyn_cast<AttributeVariable>(optional->getAnchor());
if (anchorAttr && anchorAttr != firstElement && anchorAttr->isUnitAttr()) {
elidedAnchorElement = anchorAttr;
// Add the anchor unit attribute to the operation state.
body << " result.addAttribute(\"" << anchorAttr->getVar()->name
<< "\", parser.getBuilder().getUnitAttr());\n";
}
// Generate the rest of the elements normally.
for (Element &childElement : llvm::drop_begin(elements, 1)) {
if (&childElement != elidedAnchorElement)
genElementParser(&childElement, body, attrTypeCtx);
}
body << " }\n";
/// Literals.
} else if (LiteralElement *literal = dyn_cast<LiteralElement>(element)) {
body << " if (parser.parse";
genLiteralParser(literal->getLiteral(), body);
body << ")\n return ::mlir::failure();\n";
/// Whitespaces.
} else if (isa<WhitespaceElement>(element)) {
// Nothing to parse.
/// Arguments.
} else if (auto *attr = dyn_cast<AttributeVariable>(element)) {
const NamedAttribute *var = attr->getVar();
// Check to see if we can parse this as an enum attribute.
if (canFormatEnumAttr(var))
return genEnumAttrParser(var, body, attrTypeCtx);
// Check to see if we should parse this as a symbol name attribute.
if (shouldFormatSymbolNameAttr(var)) {
body << formatv(var->attr.isOptional() ? optionalSymbolNameAttrParserCode
: symbolNameAttrParserCode,
var->name);
return;
}
// If this attribute has a buildable type, use that when parsing the
// attribute.
std::string attrTypeStr;
if (Optional<StringRef> typeBuilder = attr->getTypeBuilder()) {
llvm::raw_string_ostream os(attrTypeStr);
os << ", " << tgfmt(*typeBuilder, &attrTypeCtx);
}
body << formatv(var->attr.isOptional() ? optionalAttrParserCode
: attrParserCode,
var->name, attrTypeStr);
} else if (auto *operand = dyn_cast<OperandVariable>(element)) {
ArgumentLengthKind lengthKind = getArgumentLengthKind(operand->getVar());
StringRef name = operand->getVar()->name;
if (lengthKind == ArgumentLengthKind::Variadic)
body << llvm::formatv(variadicOperandParserCode, name);
else if (lengthKind == ArgumentLengthKind::Optional)
body << llvm::formatv(optionalOperandParserCode, name);
else
body << formatv(operandParserCode, name);
} else if (auto *region = dyn_cast<RegionVariable>(element)) {
bool isVariadic = region->getVar()->isVariadic();
body << llvm::formatv(isVariadic ? regionListParserCode : regionParserCode,
region->getVar()->name);
if (hasImplicitTermTrait) {
body << llvm::formatv(isVariadic ? regionListEnsureTerminatorParserCode
: regionEnsureTerminatorParserCode,
region->getVar()->name);
}
} else if (auto *successor = dyn_cast<SuccessorVariable>(element)) {
bool isVariadic = successor->getVar()->isVariadic();
body << formatv(isVariadic ? successorListParserCode : successorParserCode,
successor->getVar()->name);
/// Directives.
} else if (auto *attrDict = dyn_cast<AttrDictDirective>(element)) {
body << " if (parser.parseOptionalAttrDict"
<< (attrDict->isWithKeyword() ? "WithKeyword" : "")
<< "(result.attributes))\n"
<< " return ::mlir::failure();\n";
} else if (auto *customDir = dyn_cast<CustomDirective>(element)) {
genCustomDirectiveParser(customDir, body);
} else if (isa<OperandsDirective>(element)) {
body << " ::llvm::SMLoc allOperandLoc = parser.getCurrentLocation();\n"
<< " if (parser.parseOperandList(allOperands))\n"
<< " return ::mlir::failure();\n";
} else if (isa<RegionsDirective>(element)) {
body << llvm::formatv(regionListParserCode, "full");
if (hasImplicitTermTrait)
body << llvm::formatv(regionListEnsureTerminatorParserCode, "full");
} else if (isa<SuccessorsDirective>(element)) {
body << llvm::formatv(successorListParserCode, "full");
} else if (auto *dir = dyn_cast<TypeRefDirective>(element)) {
ArgumentLengthKind lengthKind;
StringRef listName = getTypeListName(dir->getOperand(), lengthKind);
if (lengthKind == ArgumentLengthKind::Variadic)
body << llvm::formatv(variadicTypeParserCode, listName);
else if (lengthKind == ArgumentLengthKind::Optional)
body << llvm::formatv(optionalTypeParserCode, listName);
else
body << formatv(typeParserCode, listName);
} else if (auto *dir = dyn_cast<TypeDirective>(element)) {
ArgumentLengthKind lengthKind;
StringRef listName = getTypeListName(dir->getOperand(), lengthKind);
if (lengthKind == ArgumentLengthKind::Variadic)
body << llvm::formatv(variadicTypeParserCode, listName);
else if (lengthKind == ArgumentLengthKind::Optional)
body << llvm::formatv(optionalTypeParserCode, listName);
else
body << formatv(typeParserCode, listName);
} else if (auto *dir = dyn_cast<FunctionalTypeDirective>(element)) {
ArgumentLengthKind ignored;
body << formatv(functionalTypeParserCode,
getTypeListName(dir->getInputs(), ignored),
getTypeListName(dir->getResults(), ignored));
} else {
llvm_unreachable("unknown format element");
}
}
void OperationFormat::genParserTypeResolution(Operator &op,
OpMethodBody &body) {
// If any of type resolutions use transformed variables, make sure that the
// types of those variables are resolved.
SmallPtrSet<const NamedTypeConstraint *, 8> verifiedVariables;
FmtContext verifierFCtx;
for (TypeResolution &resolver :
llvm::concat<TypeResolution>(resultTypes, operandTypes)) {
Optional<StringRef> transformer = resolver.getVarTransformer();
if (!transformer)
continue;
// Ensure that we don't verify the same variables twice.
const NamedTypeConstraint *variable = resolver.getVariable();
if (!variable || !verifiedVariables.insert(variable).second)
continue;
auto constraint = variable->constraint;
body << " for (::mlir::Type type : " << variable->name << "Types) {\n"
<< " (void)type;\n"
<< " if (!("
<< tgfmt(constraint.getConditionTemplate(),
&verifierFCtx.withSelf("type"))
<< ")) {\n"
<< formatv(" return parser.emitError(parser.getNameLoc()) << "
"\"'{0}' must be {1}, but got \" << type;\n",
variable->name, constraint.getSummary())
<< " }\n"
<< " }\n";
}
// Initialize the set of buildable types.
if (!buildableTypes.empty()) {
FmtContext typeBuilderCtx;
typeBuilderCtx.withBuilder("parser.getBuilder()");
for (auto &it : buildableTypes)
body << " ::mlir::Type odsBuildableType" << it.second << " = "
<< tgfmt(it.first, &typeBuilderCtx) << ";\n";
}
// Emit the code necessary for a type resolver.
auto emitTypeResolver = [&](TypeResolution &resolver, StringRef curVar) {
if (Optional<int> val = resolver.getBuilderIdx()) {
body << "odsBuildableType" << *val;
} else if (const NamedTypeConstraint *var = resolver.getVariable()) {
if (Optional<StringRef> tform = resolver.getVarTransformer()) {
FmtContext fmtContext;
if (var->isVariadic())
fmtContext.withSelf(var->name + "Types");
else
fmtContext.withSelf(var->name + "Types[0]");
body << tgfmt(*tform, &fmtContext);
} else {
body << var->name << "Types";
}
} else if (const NamedAttribute *attr = resolver.getAttribute()) {
if (Optional<StringRef> tform = resolver.getVarTransformer())
body << tgfmt(*tform,
&FmtContext().withSelf(attr->name + "Attr.getType()"));
else
body << attr->name << "Attr.getType()";
} else {
body << curVar << "Types";
}
};
// Resolve each of the result types.
if (allResultTypes) {
body << " result.addTypes(allResultTypes);\n";
} else {
for (unsigned i = 0, e = op.getNumResults(); i != e; ++i) {
body << " result.addTypes(";
emitTypeResolver(resultTypes[i], op.getResultName(i));
body << ");\n";
}
}
// Early exit if there are no operands.
if (op.getNumOperands() == 0)
return;
// Handle the case where all operand types are in one group.
if (allOperandTypes) {
// If we have all operands together, use the full operand list directly.
if (allOperands) {
body << " if (parser.resolveOperands(allOperands, allOperandTypes, "
"allOperandLoc, result.operands))\n"
" return ::mlir::failure();\n";
return;
}
// Otherwise, use llvm::concat to merge the disjoint operand lists together.
// llvm::concat does not allow the case of a single range, so guard it here.
body << " if (parser.resolveOperands(";
if (op.getNumOperands() > 1) {
body << "::llvm::concat<const ::mlir::OpAsmParser::OperandType>(";
llvm::interleaveComma(op.getOperands(), body, [&](auto &operand) {
body << operand.name << "Operands";
});
body << ")";
} else {
body << op.operand_begin()->name << "Operands";
}
body << ", allOperandTypes, parser.getNameLoc(), result.operands))\n"
<< " return ::mlir::failure();\n";
return;
}
// Handle the case where all of the operands were grouped together.
if (allOperands) {
body << " if (parser.resolveOperands(allOperands, ";
// Group all of the operand types together to perform the resolution all at
// once. Use llvm::concat to perform the merge. llvm::concat does not allow
// the case of a single range, so guard it here.
if (op.getNumOperands() > 1) {
body << "::llvm::concat<const Type>(";
llvm::interleaveComma(
llvm::seq<int>(0, op.getNumOperands()), body, [&](int i) {
body << "::llvm::ArrayRef<::mlir::Type>(";
emitTypeResolver(operandTypes[i], op.getOperand(i).name);
body << ")";
});
body << ")";
} else {
emitTypeResolver(operandTypes.front(), op.getOperand(0).name);
}
body << ", allOperandLoc, result.operands))\n"
<< " return ::mlir::failure();\n";
return;
}
// The final case is the one where each of the operands types are resolved
// separately.
for (unsigned i = 0, e = op.getNumOperands(); i != e; ++i) {
NamedTypeConstraint &operand = op.getOperand(i);
body << " if (parser.resolveOperands(" << operand.name << "Operands, ";
// Resolve the type of this operand.
TypeResolution &operandType = operandTypes[i];
emitTypeResolver(operandType, operand.name);
// If the type is resolved by a non-variadic variable, index into the
// resolved type list. This allows for resolving the types of a variadic
// operand list from a non-variadic variable.
bool verifyOperandAndTypeSize = true;
if (auto *resolverVar = operandType.getVariable()) {
if (!resolverVar->isVariadic() && !operandType.getVarTransformer()) {
body << "[0]";
verifyOperandAndTypeSize = false;
}
} else {
verifyOperandAndTypeSize = !operandType.getBuilderIdx();
}
// Check to see if the sizes between the types and operands must match. If
// they do, provide the operand location to select the proper resolution
// overload.
if (verifyOperandAndTypeSize)
body << ", " << operand.name << "OperandsLoc";
body << ", result.operands))\n return ::mlir::failure();\n";
}
}
void OperationFormat::genParserRegionResolution(Operator &op,
OpMethodBody &body) {
// Check for the case where all regions were parsed.
bool hasAllRegions = llvm::any_of(
elements, [](auto &elt) { return isa<RegionsDirective>(elt.get()); });
if (hasAllRegions) {
body << " result.addRegions(fullRegions);\n";
return;
}
// Otherwise, handle each region individually.
for (const NamedRegion &region : op.getRegions()) {
if (region.isVariadic())
body << " result.addRegions(" << region.name << "Regions);\n";
else
body << " result.addRegion(std::move(" << region.name << "Region));\n";
}
}
void OperationFormat::genParserSuccessorResolution(Operator &op,
OpMethodBody &body) {
// Check for the case where all successors were parsed.
bool hasAllSuccessors = llvm::any_of(
elements, [](auto &elt) { return isa<SuccessorsDirective>(elt.get()); });
if (hasAllSuccessors) {
body << " result.addSuccessors(fullSuccessors);\n";
return;
}
// Otherwise, handle each successor individually.
for (const NamedSuccessor &successor : op.getSuccessors()) {
if (successor.isVariadic())
body << " result.addSuccessors(" << successor.name << "Successors);\n";
else
body << " result.addSuccessors(" << successor.name << "Successor);\n";
}
}
void OperationFormat::genParserVariadicSegmentResolution(Operator &op,
OpMethodBody &body) {
if (!allOperands &&
op.getTrait("::mlir::OpTrait::AttrSizedOperandSegments")) {
body << " result.addAttribute(\"operand_segment_sizes\", "
<< "parser.getBuilder().getI32VectorAttr({";
auto interleaveFn = [&](const NamedTypeConstraint &operand) {
// If the operand is variadic emit the parsed size.
if (operand.isVariableLength())
body << "static_cast<int32_t>(" << operand.name << "Operands.size())";
else
body << "1";
};
llvm::interleaveComma(op.getOperands(), body, interleaveFn);
body << "}));\n";
}
if (!allResultTypes &&
op.getTrait("::mlir::OpTrait::AttrSizedResultSegments")) {
body << " result.addAttribute(\"result_segment_sizes\", "
<< "parser.getBuilder().getI32VectorAttr({";
auto interleaveFn = [&](const NamedTypeConstraint &result) {
// If the result is variadic emit the parsed size.
if (result.isVariableLength())
body << "static_cast<int32_t>(" << result.name << "Types.size())";
else
body << "1";
};
llvm::interleaveComma(op.getResults(), body, interleaveFn);
body << "}));\n";
}
}
//===----------------------------------------------------------------------===//
// PrinterGen
/// The code snippet used to generate a printer call for a region of an
// operation that has the SingleBlockImplicitTerminator trait.
///
/// {0}: The name of the region.
const char *regionSingleBlockImplicitTerminatorPrinterCode = R"(
{
bool printTerminator = true;
if (auto *term = {0}.empty() ? nullptr : {0}.begin()->getTerminator()) {{
printTerminator = !term->getAttrDictionary().empty() ||
term->getNumOperands() != 0 ||
term->getNumResults() != 0;
}
p.printRegion({0}, /*printEntryBlockArgs=*/true,
/*printBlockTerminators=*/printTerminator);
}
)";
/// The code snippet used to generate a printer call for an enum that has cases
/// that can't be represented with a keyword.
///
/// {0}: The name of the enum attribute.
/// {1}: The name of the enum attributes symbolToString function.
const char *enumAttrBeginPrinterCode = R"(
{
auto caseValue = {0}();
auto caseValueStr = {1}(caseValue);
)";
/// Generate the printer for the 'attr-dict' directive.
static void genAttrDictPrinter(OperationFormat &fmt, Operator &op,
OpMethodBody &body, bool withKeyword) {
body << " p.printOptionalAttrDict" << (withKeyword ? "WithKeyword" : "")
<< "(getAttrs(), /*elidedAttrs=*/{";
// Elide the variadic segment size attributes if necessary.
if (!fmt.allOperands &&
op.getTrait("::mlir::OpTrait::AttrSizedOperandSegments"))
body << "\"operand_segment_sizes\", ";
if (!fmt.allResultTypes &&
op.getTrait("::mlir::OpTrait::AttrSizedResultSegments"))
body << "\"result_segment_sizes\", ";
llvm::interleaveComma(
fmt.usedAttributes, body,
[&](const NamedAttribute *attr) { body << "\"" << attr->name << "\""; });
body << "});\n";
}
/// Generate the printer for a literal value. `shouldEmitSpace` is true if a
/// space should be emitted before this element. `lastWasPunctuation` is true if
/// the previous element was a punctuation literal.
static void genLiteralPrinter(StringRef value, OpMethodBody &body,
bool &shouldEmitSpace, bool &lastWasPunctuation) {
body << " p";
// Don't insert a space for certain punctuation.
auto shouldPrintSpaceBeforeLiteral = [&] {
if (value.size() != 1 && value != "->")
return true;
if (lastWasPunctuation)
return !StringRef(">)}],").contains(value.front());
return !StringRef("<>(){}[],").contains(value.front());
};
if (shouldEmitSpace && shouldPrintSpaceBeforeLiteral())
body << " << ' '";
body << " << \"" << value << "\";\n";
// Insert a space after certain literals.
shouldEmitSpace =
value.size() != 1 || !StringRef("<({[").contains(value.front());
lastWasPunctuation = !(value.front() == '_' || isalpha(value.front()));
}
/// Generate the printer for a space. `shouldEmitSpace` and `lastWasPunctuation`
/// are set to false.
static void genSpacePrinter(bool value, OpMethodBody &body,
bool &shouldEmitSpace, bool &lastWasPunctuation) {
if (value) {
body << " p << ' ';\n";
lastWasPunctuation = false;
}
shouldEmitSpace = false;
}
/// Generate the printer for a custom directive.
static void genCustomDirectivePrinter(CustomDirective *customDir,
OpMethodBody &body) {
body << " print" << customDir->getName() << "(p, *this";
for (Element &param : customDir->getArguments()) {
body << ", ";
if (auto *attr = dyn_cast<AttributeVariable>(&param)) {
body << attr->getVar()->name << "Attr()";
} else if (isa<AttrDictDirective>(&param)) {
body << "getOperation()->getAttrDictionary()";
} else if (auto *operand = dyn_cast<OperandVariable>(&param)) {
body << operand->getVar()->name << "()";
} else if (auto *region = dyn_cast<RegionVariable>(&param)) {
body << region->getVar()->name << "()";
} else if (auto *successor = dyn_cast<SuccessorVariable>(&param)) {
body << successor->getVar()->name << "()";
} else if (auto *dir = dyn_cast<TypeRefDirective>(&param)) {
auto *typeOperand = dir->getOperand();
auto *operand = dyn_cast<OperandVariable>(typeOperand);
auto *var = operand ? operand->getVar()
: cast<ResultVariable>(typeOperand)->getVar();
if (var->isVariadic())
body << var->name << "().getTypes()";
else if (var->isOptional())
body << llvm::formatv("({0}() ? {0}().getType() : Type())", var->name);
else
body << var->name << "().getType()";
} else if (auto *dir = dyn_cast<TypeDirective>(&param)) {
auto *typeOperand = dir->getOperand();
auto *operand = dyn_cast<OperandVariable>(typeOperand);
auto *var = operand ? operand->getVar()
: cast<ResultVariable>(typeOperand)->getVar();
if (var->isVariadic())
body << var->name << "().getTypes()";
else if (var->isOptional())
body << llvm::formatv("({0}() ? {0}().getType() : Type())", var->name);
else
body << var->name << "().getType()";
} else {
llvm_unreachable("unknown custom directive parameter");
}
}
body << ");\n";
}
/// Generate the printer for a region with the given variable name.
static void genRegionPrinter(const Twine &regionName, OpMethodBody &body,
bool hasImplicitTermTrait) {
if (hasImplicitTermTrait)
body << llvm::formatv(regionSingleBlockImplicitTerminatorPrinterCode,
regionName);
else
body << " p.printRegion(" << regionName << ");\n";
}
static void genVariadicRegionPrinter(const Twine &regionListName,
OpMethodBody &body,
bool hasImplicitTermTrait) {
body << " llvm::interleaveComma(" << regionListName
<< ", p, [&](::mlir::Region &region) {\n ";
genRegionPrinter("region", body, hasImplicitTermTrait);
body << " });\n";
}
/// Generate the C++ for an operand to a (*-)type directive.
static OpMethodBody &genTypeOperandPrinter(Element *arg, OpMethodBody &body) {
if (isa<OperandsDirective>(arg))
return body << "getOperation()->getOperandTypes()";
if (isa<ResultsDirective>(arg))
return body << "getOperation()->getResultTypes()";
auto *operand = dyn_cast<OperandVariable>(arg);
auto *var = operand ? operand->getVar() : cast<ResultVariable>(arg)->getVar();
if (var->isVariadic())
return body << var->name << "().getTypes()";
if (var->isOptional())
return body << llvm::formatv(
"({0}() ? ::llvm::ArrayRef<::mlir::Type>({0}().getType()) : "
"::llvm::ArrayRef<::mlir::Type>())",
var->name);
return body << "::llvm::ArrayRef<::mlir::Type>(" << var->name
<< "().getType())";
}
/// Generate the printer for an enum attribute.
static void genEnumAttrPrinter(const NamedAttribute *var, OpMethodBody &body) {
Attribute baseAttr = var->attr.getBaseAttr();
const EnumAttr &enumAttr = cast<EnumAttr>(baseAttr);
std::vector<EnumAttrCase> cases = enumAttr.getAllCases();
body << llvm::formatv(enumAttrBeginPrinterCode,
(var->attr.isOptional() ? "*" : "") + var->name,
enumAttr.getSymbolToStringFnName());
// Get a string containing all of the cases that can't be represented with a
// keyword.
llvm::BitVector nonKeywordCases(cases.size());
bool hasStrCase = false;
for (auto it : llvm::enumerate(cases)) {
hasStrCase = it.value().isStrCase();
if (!canFormatStringAsKeyword(it.value().getStr()))
nonKeywordCases.set(it.index());
}
// If this is a string enum, use the case string to determine which cases
// need to use the string form.
if (hasStrCase) {
if (nonKeywordCases.any()) {
body << " if (llvm::is_contained(llvm::ArrayRef<llvm::StringRef>(";
llvm::interleaveComma(nonKeywordCases.set_bits(), body, [&](unsigned it) {
body << '"' << cases[it].getStr() << '"';
});
body << ")))\n"
" p << '\"' << caseValueStr << '\"';\n"
" else\n ";
}
body << " p << caseValueStr;\n"
" }\n";
return;
}
// Otherwise if this is a bit enum attribute, don't allow cases that may
// overlap with other cases. For simplicity sake, only allow cases with a
// single bit value.
if (enumAttr.isBitEnum()) {
for (auto it : llvm::enumerate(cases)) {
int64_t value = it.value().getValue();
if (value < 0 || !llvm::isPowerOf2_64(value))
nonKeywordCases.set(it.index());
}
}
// If there are any cases that can't be used with a keyword, switch on the
// case value to determine when to print in the string form.
if (nonKeywordCases.any()) {
body << " switch (caseValue) {\n";
StringRef cppNamespace = enumAttr.getCppNamespace();
StringRef enumName = enumAttr.getEnumClassName();
for (auto it : llvm::enumerate(cases)) {
if (nonKeywordCases.test(it.index()))
continue;
StringRef symbol = it.value().getSymbol();
body << llvm::formatv(" case {0}::{1}::{2}:\n", cppNamespace, enumName,
llvm::isDigit(symbol.front()) ? ("_" + symbol)
: symbol);
}
body << " p << caseValueStr;\n"
" break;\n"
" default:\n"
" p << '\"' << caseValueStr << '\"';\n"
" break;\n"
" }\n"
" }\n";
return;
}
body << " p << caseValueStr;\n"
" }\n";
}
/// Generate the check for the anchor of an optional group.
static void genOptionalGroupPrinterAnchor(Element *anchor, OpMethodBody &body) {
TypeSwitch<Element *>(anchor)
.Case<OperandVariable, ResultVariable>([&](auto *element) {
const NamedTypeConstraint *var = element->getVar();
if (var->isOptional())
body << " if (" << var->name << "()) {\n";
else if (var->isVariadic())
body << " if (!" << var->name << "().empty()) {\n";
})
.Case<RegionVariable>([&](RegionVariable *element) {
const NamedRegion *var = element->getVar();
// TODO: Add a check for optional regions here when ODS supports it.
body << " if (!" << var->name << "().empty()) {\n";
})
.Case<TypeDirective>([&](TypeDirective *element) {
genOptionalGroupPrinterAnchor(element->getOperand(), body);
})
.Case<FunctionalTypeDirective>([&](FunctionalTypeDirective *element) {
genOptionalGroupPrinterAnchor(element->getInputs(), body);
})
.Case<AttributeVariable>([&](AttributeVariable *attr) {
body << " if ((*this)->getAttr(\"" << attr->getVar()->name
<< "\")) {\n";
});
}
void OperationFormat::genElementPrinter(Element *element, OpMethodBody &body,
Operator &op, bool &shouldEmitSpace,
bool &lastWasPunctuation) {
if (LiteralElement *literal = dyn_cast<LiteralElement>(element))
return genLiteralPrinter(literal->getLiteral(), body, shouldEmitSpace,
lastWasPunctuation);
// Emit a whitespace element.
if (isa<NewlineElement>(element)) {
body << " p.printNewline();\n";
return;
}
if (SpaceElement *space = dyn_cast<SpaceElement>(element))
return genSpacePrinter(space->getValue(), body, shouldEmitSpace,
lastWasPunctuation);
// Emit an optional group.
if (OptionalElement *optional = dyn_cast<OptionalElement>(element)) {
// Emit the check for the presence of the anchor element.
Element *anchor = optional->getAnchor();
genOptionalGroupPrinterAnchor(anchor, body);
// If the anchor is a unit attribute, we don't need to print it. When
// parsing, we will add this attribute if this group is present.
auto elements = optional->getElements();
Element *elidedAnchorElement = nullptr;
auto *anchorAttr = dyn_cast<AttributeVariable>(anchor);
if (anchorAttr && anchorAttr != &*elements.begin() &&
anchorAttr->isUnitAttr()) {
elidedAnchorElement = anchorAttr;
}
// Emit each of the elements.
for (Element &childElement : elements) {
if (&childElement != elidedAnchorElement) {
genElementPrinter(&childElement, body, op, shouldEmitSpace,
lastWasPunctuation);
}
}
body << " }\n";
return;
}
// Emit the attribute dictionary.
if (auto *attrDict = dyn_cast<AttrDictDirective>(element)) {
genAttrDictPrinter(*this, op, body, attrDict->isWithKeyword());
lastWasPunctuation = false;
return;
}
// Optionally insert a space before the next element. The AttrDict printer
// already adds a space as necessary.
if (shouldEmitSpace || !lastWasPunctuation)
body << " p << ' ';\n";
lastWasPunctuation = false;
shouldEmitSpace = true;
if (auto *attr = dyn_cast<AttributeVariable>(element)) {
const NamedAttribute *var = attr->getVar();
// If we are formatting as an enum, symbolize the attribute as a string.
if (canFormatEnumAttr(var))
return genEnumAttrPrinter(var, body);
// If we are formatting as a symbol name, handle it as a symbol name.
if (shouldFormatSymbolNameAttr(var)) {
body << " p.printSymbolName(" << var->name << "Attr().getValue());\n";
return;
}
// Elide the attribute type if it is buildable.
if (attr->getTypeBuilder())
body << " p.printAttributeWithoutType(" << var->name << "Attr());\n";
else
body << " p.printAttribute(" << var->name << "Attr());\n";
} else if (auto *operand = dyn_cast<OperandVariable>(element)) {
if (operand->getVar()->isOptional()) {
body << " if (::mlir::Value value = " << operand->getVar()->name
<< "())\n"
<< " p << value;\n";
} else {
body << " p << " << operand->getVar()->name << "();\n";
}
} else if (auto *region = dyn_cast<RegionVariable>(element)) {
const NamedRegion *var = region->getVar();
if (var->isVariadic()) {
genVariadicRegionPrinter(var->name + "()", body, hasImplicitTermTrait);
} else {
genRegionPrinter(var->name + "()", body, hasImplicitTermTrait);
}
} else if (auto *successor = dyn_cast<SuccessorVariable>(element)) {
const NamedSuccessor *var = successor->getVar();
if (var->isVariadic())
body << " ::llvm::interleaveComma(" << var->name << "(), p);\n";
else
body << " p << " << var->name << "();\n";
} else if (auto *dir = dyn_cast<CustomDirective>(element)) {
genCustomDirectivePrinter(dir, body);
} else if (isa<OperandsDirective>(element)) {
body << " p << getOperation()->getOperands();\n";
} else if (isa<RegionsDirective>(element)) {
genVariadicRegionPrinter("getOperation()->getRegions()", body,
hasImplicitTermTrait);
} else if (isa<SuccessorsDirective>(element)) {
body << " ::llvm::interleaveComma(getOperation()->getSuccessors(), p);\n";
} else if (auto *dir = dyn_cast<TypeDirective>(element)) {
body << " p << ";
genTypeOperandPrinter(dir->getOperand(), body) << ";\n";
} else if (auto *dir = dyn_cast<TypeRefDirective>(element)) {
body << " p << ";
genTypeOperandPrinter(dir->getOperand(), body) << ";\n";
} else if (auto *dir = dyn_cast<FunctionalTypeDirective>(element)) {
body << " p.printFunctionalType(";
genTypeOperandPrinter(dir->getInputs(), body) << ", ";
genTypeOperandPrinter(dir->getResults(), body) << ");\n";
} else {
llvm_unreachable("unknown format element");
}
}
void OperationFormat::genPrinter(Operator &op, OpClass &opClass) {
auto *method =
opClass.addMethodAndPrune("void", "print", "::mlir::OpAsmPrinter &p");
auto &body = method->body();
// Emit the operation name, trimming the prefix if this is the standard
// dialect.
body << " p << \"";
std::string opName = op.getOperationName();
if (op.getDialectName() == "std")
body << StringRef(opName).drop_front(4);
else
body << opName;
body << "\";\n";
// Flags for if we should emit a space, and if the last element was
// punctuation.
bool shouldEmitSpace = true, lastWasPunctuation = false;
for (auto &element : elements)
genElementPrinter(element.get(), body, op, shouldEmitSpace,
lastWasPunctuation);
}
//===----------------------------------------------------------------------===//
// FormatLexer
//===----------------------------------------------------------------------===//
namespace {
/// This class represents a specific token in the input format.
class Token {
public:
enum Kind {
// Markers.
eof,
error,
// Tokens with no info.
l_paren,
r_paren,
caret,
comma,
equal,
less,
greater,
question,
// Keywords.
keyword_start,
kw_attr_dict,
kw_attr_dict_w_keyword,
kw_custom,
kw_functional_type,
kw_operands,
kw_regions,
kw_results,
kw_successors,
kw_type,
kw_type_ref,
keyword_end,
// String valued tokens.
identifier,
literal,
variable,
};
Token(Kind kind, StringRef spelling) : kind(kind), spelling(spelling) {}
/// Return the bytes that make up this token.
StringRef getSpelling() const { return spelling; }
/// Return the kind of this token.
Kind getKind() const { return kind; }
/// Return a location for this token.
llvm::SMLoc getLoc() const {
return llvm::SMLoc::getFromPointer(spelling.data());
}
/// Return if this token is a keyword.
bool isKeyword() const { return kind > keyword_start && kind < keyword_end; }
private:
/// Discriminator that indicates the kind of token this is.
Kind kind;
/// A reference to the entire token contents; this is always a pointer into
/// a memory buffer owned by the source manager.
StringRef spelling;
};
/// This class implements a simple lexer for operation assembly format strings.
class FormatLexer {
public:
FormatLexer(llvm::SourceMgr &mgr, Operator &op);
/// Lex the next token and return it.
Token lexToken();
/// Emit an error to the lexer with the given location and message.
Token emitError(llvm::SMLoc loc, const Twine &msg);
Token emitError(const char *loc, const Twine &msg);
Token emitErrorAndNote(llvm::SMLoc loc, const Twine &msg, const Twine &note);
private:
Token formToken(Token::Kind kind, const char *tokStart) {
return Token(kind, StringRef(tokStart, curPtr - tokStart));
}
/// Return the next character in the stream.
int getNextChar();
/// Lex an identifier, literal, or variable.
Token lexIdentifier(const char *tokStart);
Token lexLiteral(const char *tokStart);
Token lexVariable(const char *tokStart);
llvm::SourceMgr &srcMgr;
Operator &op;
StringRef curBuffer;
const char *curPtr;
};
} // end anonymous namespace
FormatLexer::FormatLexer(llvm::SourceMgr &mgr, Operator &op)
: srcMgr(mgr), op(op) {
curBuffer = srcMgr.getMemoryBuffer(mgr.getMainFileID())->getBuffer();
curPtr = curBuffer.begin();
}
Token FormatLexer::emitError(llvm::SMLoc loc, const Twine &msg) {
srcMgr.PrintMessage(loc, llvm::SourceMgr::DK_Error, msg);
llvm::SrcMgr.PrintMessage(op.getLoc()[0], llvm::SourceMgr::DK_Note,
"in custom assembly format for this operation");
return formToken(Token::error, loc.getPointer());
}
Token FormatLexer::emitErrorAndNote(llvm::SMLoc loc, const Twine &msg,
const Twine &note) {
srcMgr.PrintMessage(loc, llvm::SourceMgr::DK_Error, msg);
llvm::SrcMgr.PrintMessage(op.getLoc()[0], llvm::SourceMgr::DK_Note,
"in custom assembly format for this operation");
srcMgr.PrintMessage(loc, llvm::SourceMgr::DK_Note, note);
return formToken(Token::error, loc.getPointer());
}
Token FormatLexer::emitError(const char *loc, const Twine &msg) {
return emitError(llvm::SMLoc::getFromPointer(loc), msg);
}
int FormatLexer::getNextChar() {
char curChar = *curPtr++;
switch (curChar) {
default:
return (unsigned char)curChar;
case 0: {
// A nul character in the stream is either the end of the current buffer or
// a random nul in the file. Disambiguate that here.
if (curPtr - 1 != curBuffer.end())
return 0;
// Otherwise, return end of file.
--curPtr;
return EOF;
}
case '\n':
case '\r':
// Handle the newline character by ignoring it and incrementing the line
// count. However, be careful about 'dos style' files with \n\r in them.
// Only treat a \n\r or \r\n as a single line.
if ((*curPtr == '\n' || (*curPtr == '\r')) && *curPtr != curChar)
++curPtr;
return '\n';
}
}
Token FormatLexer::lexToken() {
const char *tokStart = curPtr;
// This always consumes at least one character.
int curChar = getNextChar();
switch (curChar) {
default:
// Handle identifiers: [a-zA-Z_]
if (isalpha(curChar) || curChar == '_')
return lexIdentifier(tokStart);
// Unknown character, emit an error.
return emitError(tokStart, "unexpected character");
case EOF:
// Return EOF denoting the end of lexing.
return formToken(Token::eof, tokStart);
// Lex punctuation.
case '^':
return formToken(Token::caret, tokStart);
case ',':
return formToken(Token::comma, tokStart);
case '=':
return formToken(Token::equal, tokStart);
case '<':
return formToken(Token::less, tokStart);
case '>':
return formToken(Token::greater, tokStart);
case '?':
return formToken(Token::question, tokStart);
case '(':
return formToken(Token::l_paren, tokStart);
case ')':
return formToken(Token::r_paren, tokStart);
// Ignore whitespace characters.
case 0:
case ' ':
case '\t':
case '\n':
return lexToken();
case '`':
return lexLiteral(tokStart);
case '$':
return lexVariable(tokStart);
}
}
Token FormatLexer::lexLiteral(const char *tokStart) {
assert(curPtr[-1] == '`');
// Lex a literal surrounded by ``.
while (const char curChar = *curPtr++) {
if (curChar == '`')
return formToken(Token::literal, tokStart);
}
return emitError(curPtr - 1, "unexpected end of file in literal");
}
Token FormatLexer::lexVariable(const char *tokStart) {
if (!isalpha(curPtr[0]) && curPtr[0] != '_')
return emitError(curPtr - 1, "expected variable name");
// Otherwise, consume the rest of the characters.
while (isalnum(*curPtr) || *curPtr == '_')
++curPtr;
return formToken(Token::variable, tokStart);
}
Token FormatLexer::lexIdentifier(const char *tokStart) {
// Match the rest of the identifier regex: [0-9a-zA-Z_\-]*
while (isalnum(*curPtr) || *curPtr == '_' || *curPtr == '-')
++curPtr;
// Check to see if this identifier is a keyword.
StringRef str(tokStart, curPtr - tokStart);
Token::Kind kind =
StringSwitch<Token::Kind>(str)
.Case("attr-dict", Token::kw_attr_dict)
.Case("attr-dict-with-keyword", Token::kw_attr_dict_w_keyword)
.Case("custom", Token::kw_custom)
.Case("functional-type", Token::kw_functional_type)
.Case("operands", Token::kw_operands)
.Case("regions", Token::kw_regions)
.Case("results", Token::kw_results)
.Case("successors", Token::kw_successors)
.Case("type", Token::kw_type)
.Case("type_ref", Token::kw_type_ref)
.Default(Token::identifier);
return Token(kind, str);
}
//===----------------------------------------------------------------------===//
// FormatParser
//===----------------------------------------------------------------------===//
/// Function to find an element within the given range that has the same name as
/// 'name'.
template <typename RangeT>
static auto findArg(RangeT &&range, StringRef name) {
auto it = llvm::find_if(range, [=](auto &arg) { return arg.name == name; });
return it != range.end() ? &*it : nullptr;
}
namespace {
/// This class implements a parser for an instance of an operation assembly
/// format.
class FormatParser {
public:
FormatParser(llvm::SourceMgr &mgr, OperationFormat &format, Operator &op)
: lexer(mgr, op), curToken(lexer.lexToken()), fmt(format), op(op),
seenOperandTypes(op.getNumOperands()),
seenResultTypes(op.getNumResults()) {}
/// Parse the operation assembly format.
LogicalResult parse();
private:
/// This struct represents a type resolution instance. It includes a specific
/// type as well as an optional transformer to apply to that type in order to
/// properly resolve the type of a variable.
struct TypeResolutionInstance {
ConstArgument resolver;
Optional<StringRef> transformer;
};
/// An iterator over the elements of a format group.
using ElementsIterT = llvm::pointee_iterator<
std::vector<std::unique_ptr<Element>>::const_iterator>;
/// Verify the state of operation attributes within the format.
LogicalResult verifyAttributes(llvm::SMLoc loc);
/// Verify the attribute elements at the back of the given stack of iterators.
LogicalResult verifyAttributes(
llvm::SMLoc loc,
SmallVectorImpl<std::pair<ElementsIterT, ElementsIterT>> &iteratorStack);
/// Verify the state of operation operands within the format.
LogicalResult
verifyOperands(llvm::SMLoc loc,
llvm::StringMap<TypeResolutionInstance> &variableTyResolver);
/// Verify the state of operation regions within the format.
LogicalResult verifyRegions(llvm::SMLoc loc);
/// Verify the state of operation results within the format.
LogicalResult
verifyResults(llvm::SMLoc loc,
llvm::StringMap<TypeResolutionInstance> &variableTyResolver);
/// Verify the state of operation successors within the format.
LogicalResult verifySuccessors(llvm::SMLoc loc);
/// Given the values of an `AllTypesMatch` trait, check for inferable type
/// resolution.
void handleAllTypesMatchConstraint(
ArrayRef<StringRef> values,
llvm::StringMap<TypeResolutionInstance> &variableTyResolver);
/// Check for inferable type resolution given all operands, and or results,
/// have the same type. If 'includeResults' is true, the results also have the
/// same type as all of the operands.
void handleSameTypesConstraint(
llvm::StringMap<TypeResolutionInstance> &variableTyResolver,
bool includeResults);
/// Check for inferable type resolution based on another operand, result, or
/// attribute.
void handleTypesMatchConstraint(
llvm::StringMap<TypeResolutionInstance> &variableTyResolver,
llvm::Record def);
/// Returns an argument or attribute with the given name that has been seen
/// within the format.
ConstArgument findSeenArg(StringRef name);
/// Parse a specific element.
LogicalResult parseElement(std::unique_ptr<Element> &element,
bool isTopLevel);
LogicalResult parseVariable(std::unique_ptr<Element> &element,
bool isTopLevel);
LogicalResult parseDirective(std::unique_ptr<Element> &element,
bool isTopLevel);
LogicalResult parseLiteral(std::unique_ptr<Element> &element);
LogicalResult parseOptional(std::unique_ptr<Element> &element,
bool isTopLevel);
LogicalResult parseOptionalChildElement(
std::vector<std::unique_ptr<Element>> &childElements,
Optional<unsigned> &anchorIdx);
LogicalResult verifyOptionalChildElement(Element *element,
llvm::SMLoc childLoc, bool isAnchor);
/// Parse the various different directives.
LogicalResult parseAttrDictDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel,
bool withKeyword);
LogicalResult parseCustomDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel);
LogicalResult parseCustomDirectiveParameter(
std::vector<std::unique_ptr<Element>> &parameters);
LogicalResult parseFunctionalTypeDirective(std::unique_ptr<Element> &element,
Token tok, bool isTopLevel);
LogicalResult parseOperandsDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel);
LogicalResult parseRegionsDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel);
LogicalResult parseResultsDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel);
LogicalResult parseSuccessorsDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel);
LogicalResult parseTypeDirective(std::unique_ptr<Element> &element, Token tok,
bool isTopLevel, bool isTypeRef = false);
LogicalResult parseTypeDirectiveOperand(std::unique_ptr<Element> &element,
bool isTypeRef = false);
//===--------------------------------------------------------------------===//
// Lexer Utilities
//===--------------------------------------------------------------------===//
/// Advance the current lexer onto the next token.
void consumeToken() {
assert(curToken.getKind() != Token::eof &&
curToken.getKind() != Token::error &&
"shouldn't advance past EOF or errors");
curToken = lexer.lexToken();
}
LogicalResult parseToken(Token::Kind kind, const Twine &msg) {
if (curToken.getKind() != kind)
return emitError(curToken.getLoc(), msg);
consumeToken();
return ::mlir::success();
}
LogicalResult emitError(llvm::SMLoc loc, const Twine &msg) {
lexer.emitError(loc, msg);
return ::mlir::failure();
}
LogicalResult emitErrorAndNote(llvm::SMLoc loc, const Twine &msg,
const Twine &note) {
lexer.emitErrorAndNote(loc, msg, note);
return ::mlir::failure();
}
//===--------------------------------------------------------------------===//
// Fields
//===--------------------------------------------------------------------===//
FormatLexer lexer;
Token curToken;
OperationFormat &fmt;
Operator &op;
// The following are various bits of format state used for verification
// during parsing.
bool hasAttrDict = false;
bool hasAllRegions = false, hasAllSuccessors = false;
llvm::SmallBitVector seenOperandTypes, seenResultTypes;
llvm::SmallSetVector<const NamedAttribute *, 8> seenAttrs;
llvm::DenseSet<const NamedTypeConstraint *> seenOperands;
llvm::DenseSet<const NamedRegion *> seenRegions;
llvm::DenseSet<const NamedSuccessor *> seenSuccessors;
};
} // end anonymous namespace
LogicalResult FormatParser::parse() {
llvm::SMLoc loc = curToken.getLoc();
// Parse each of the format elements into the main format.
while (curToken.getKind() != Token::eof) {
std::unique_ptr<Element> element;
if (failed(parseElement(element, /*isTopLevel=*/true)))
return ::mlir::failure();
fmt.elements.push_back(std::move(element));
}
// Check that the attribute dictionary is in the format.
if (!hasAttrDict)
return emitError(loc, "'attr-dict' directive not found in "
"custom assembly format");
// Check for any type traits that we can use for inferring types.
llvm::StringMap<TypeResolutionInstance> variableTyResolver;
for (const OpTrait &trait : op.getTraits()) {
const llvm::Record &def = trait.getDef();
if (def.isSubClassOf("AllTypesMatch")) {
handleAllTypesMatchConstraint(def.getValueAsListOfStrings("values"),
variableTyResolver);
} else if (def.getName() == "SameTypeOperands") {
handleSameTypesConstraint(variableTyResolver, /*includeResults=*/false);
} else if (def.getName() == "SameOperandsAndResultType") {
handleSameTypesConstraint(variableTyResolver, /*includeResults=*/true);
} else if (def.isSubClassOf("TypesMatchWith")) {
handleTypesMatchConstraint(variableTyResolver, def);
}
}
// Verify the state of the various operation components.
if (failed(verifyAttributes(loc)) ||
failed(verifyResults(loc, variableTyResolver)) ||
failed(verifyOperands(loc, variableTyResolver)) ||
failed(verifyRegions(loc)) || failed(verifySuccessors(loc)))
return ::mlir::failure();
// Collect the set of used attributes in the format.
fmt.usedAttributes = seenAttrs.takeVector();
return ::mlir::success();
}
LogicalResult FormatParser::verifyAttributes(llvm::SMLoc loc) {
// Check that there are no `:` literals after an attribute without a constant
// type. The attribute grammar contains an optional trailing colon type, which
// can lead to unexpected and generally unintended behavior. Given that, it is
// better to just error out here instead.
using ElementsIterT = llvm::pointee_iterator<
std::vector<std::unique_ptr<Element>>::const_iterator>;
SmallVector<std::pair<ElementsIterT, ElementsIterT>, 1> iteratorStack;
iteratorStack.emplace_back(fmt.elements.begin(), fmt.elements.end());
while (!iteratorStack.empty())
if (failed(verifyAttributes(loc, iteratorStack)))
return ::mlir::failure();
return ::mlir::success();
}
/// Verify the attribute elements at the back of the given stack of iterators.
LogicalResult FormatParser::verifyAttributes(
llvm::SMLoc loc,
SmallVectorImpl<std::pair<ElementsIterT, ElementsIterT>> &iteratorStack) {
auto &stackIt = iteratorStack.back();
ElementsIterT &it = stackIt.first, e = stackIt.second;
while (it != e) {
Element *element = &*(it++);
// Traverse into optional groups.
if (auto *optional = dyn_cast<OptionalElement>(element)) {
auto elements = optional->getElements();
iteratorStack.emplace_back(elements.begin(), elements.end());
return ::mlir::success();
}
// We are checking for an attribute element followed by a `:`, so there is
// no need to check the end.
if (it == e && iteratorStack.size() == 1)
break;
// Check for an attribute with a constant type builder, followed by a `:`.
auto *prevAttr = dyn_cast<AttributeVariable>(element);
if (!prevAttr || prevAttr->getTypeBuilder())
continue;
// Check the next iterator within the stack for literal elements.
for (auto &nextItPair : iteratorStack) {
ElementsIterT nextIt = nextItPair.first, nextE = nextItPair.second;
for (; nextIt != nextE; ++nextIt) {
// Skip any trailing whitespace, attribute dictionaries, or optional
// groups.
if (isa<WhitespaceElement>(*nextIt) ||
isa<AttrDictDirective>(*nextIt) || isa<OptionalElement>(*nextIt))
continue;
// We are only interested in `:` literals.
auto *literal = dyn_cast<LiteralElement>(&*nextIt);
if (!literal || literal->getLiteral() != ":")
break;
// TODO: Use the location of the literal element itself.
return emitError(
loc, llvm::formatv("format ambiguity caused by `:` literal found "
"after attribute `{0}` which does not have "
"a buildable type",
prevAttr->getVar()->name));
}
}
}
iteratorStack.pop_back();
return ::mlir::success();
}
LogicalResult FormatParser::verifyOperands(
llvm::SMLoc loc,
llvm::StringMap<TypeResolutionInstance> &variableTyResolver) {
// Check that all of the operands are within the format, and their types can
// be inferred.
auto &buildableTypes = fmt.buildableTypes;
for (unsigned i = 0, e = op.getNumOperands(); i != e; ++i) {
NamedTypeConstraint &operand = op.getOperand(i);
// Check that the operand itself is in the format.
if (!fmt.allOperands && !seenOperands.count(&operand)) {
return emitErrorAndNote(loc,
"operand #" + Twine(i) + ", named '" +
operand.name + "', not found",
"suggest adding a '$" + operand.name +
"' directive to the custom assembly format");
}
// Check that the operand type is in the format, or that it can be inferred.
if (fmt.allOperandTypes || seenOperandTypes.test(i))
continue;
// Check to see if we can infer this type from another variable.
auto varResolverIt = variableTyResolver.find(op.getOperand(i).name);
if (varResolverIt != variableTyResolver.end()) {
TypeResolutionInstance &resolver = varResolverIt->second;
fmt.operandTypes[i].setResolver(resolver.resolver, resolver.transformer);
continue;
}
// Similarly to results, allow a custom builder for resolving the type if
// we aren't using the 'operands' directive.
Optional<StringRef> builder = operand.constraint.getBuilderCall();
if (!builder || (fmt.allOperands && operand.isVariableLength())) {
return emitErrorAndNote(
loc,
"type of operand #" + Twine(i) + ", named '" + operand.name +
"', is not buildable and a buildable type cannot be inferred",
"suggest adding a type constraint to the operation or adding a "
"'type($" +
operand.name + ")' directive to the " + "custom assembly format");
}
auto it = buildableTypes.insert({*builder, buildableTypes.size()});
fmt.operandTypes[i].setBuilderIdx(it.first->second);
}
return ::mlir::success();
}
LogicalResult FormatParser::verifyRegions(llvm::SMLoc loc) {
// Check that all of the regions are within the format.
if (hasAllRegions)
return ::mlir::success();
for (unsigned i = 0, e = op.getNumRegions(); i != e; ++i) {
const NamedRegion &region = op.getRegion(i);
if (!seenRegions.count(&region)) {
return emitErrorAndNote(loc,
"region #" + Twine(i) + ", named '" +
region.name + "', not found",
"suggest adding a '$" + region.name +
"' directive to the custom assembly format");
}
}
return ::mlir::success();
}
LogicalResult FormatParser::verifyResults(
llvm::SMLoc loc,
llvm::StringMap<TypeResolutionInstance> &variableTyResolver) {
// If we format all of the types together, there is nothing to check.
if (fmt.allResultTypes)
return ::mlir::success();
// Check that all of the result types can be inferred.
auto &buildableTypes = fmt.buildableTypes;
for (unsigned i = 0, e = op.getNumResults(); i != e; ++i) {
if (seenResultTypes.test(i))
continue;
// Check to see if we can infer this type from another variable.
auto varResolverIt = variableTyResolver.find(op.getResultName(i));
if (varResolverIt != variableTyResolver.end()) {
TypeResolutionInstance resolver = varResolverIt->second;
fmt.resultTypes[i].setResolver(resolver.resolver, resolver.transformer);
continue;
}
// If the result is not variable length, allow for the case where the type
// has a builder that we can use.
NamedTypeConstraint &result = op.getResult(i);
Optional<StringRef> builder = result.constraint.getBuilderCall();
if (!builder || result.isVariableLength()) {
return emitErrorAndNote(
loc,
"type of result #" + Twine(i) + ", named '" + result.name +
"', is not buildable and a buildable type cannot be inferred",
"suggest adding a type constraint to the operation or adding a "
"'type($" +
result.name + ")' directive to the " + "custom assembly format");
}
// Note in the format that this result uses the custom builder.
auto it = buildableTypes.insert({*builder, buildableTypes.size()});
fmt.resultTypes[i].setBuilderIdx(it.first->second);
}
return ::mlir::success();
}
LogicalResult FormatParser::verifySuccessors(llvm::SMLoc loc) {
// Check that all of the successors are within the format.
if (hasAllSuccessors)
return ::mlir::success();
for (unsigned i = 0, e = op.getNumSuccessors(); i != e; ++i) {
const NamedSuccessor &successor = op.getSuccessor(i);
if (!seenSuccessors.count(&successor)) {
return emitErrorAndNote(loc,
"successor #" + Twine(i) + ", named '" +
successor.name + "', not found",
"suggest adding a '$" + successor.name +
"' directive to the custom assembly format");
}
}
return ::mlir::success();
}
void FormatParser::handleAllTypesMatchConstraint(
ArrayRef<StringRef> values,
llvm::StringMap<TypeResolutionInstance> &variableTyResolver) {
for (unsigned i = 0, e = values.size(); i != e; ++i) {
// Check to see if this value matches a resolved operand or result type.
ConstArgument arg = findSeenArg(values[i]);
if (!arg)
continue;
// Mark this value as the type resolver for the other variables.
for (unsigned j = 0; j != i; ++j)
variableTyResolver[values[j]] = {arg, llvm::None};
for (unsigned j = i + 1; j != e; ++j)
variableTyResolver[values[j]] = {arg, llvm::None};
}
}
void FormatParser::handleSameTypesConstraint(
llvm::StringMap<TypeResolutionInstance> &variableTyResolver,
bool includeResults) {
const NamedTypeConstraint *resolver = nullptr;
int resolvedIt = -1;
// Check to see if there is an operand or result to use for the resolution.
if ((resolvedIt = seenOperandTypes.find_first()) != -1)
resolver = &op.getOperand(resolvedIt);
else if (includeResults && (resolvedIt = seenResultTypes.find_first()) != -1)
resolver = &op.getResult(resolvedIt);
else
return;
// Set the resolvers for each operand and result.
for (unsigned i = 0, e = op.getNumOperands(); i != e; ++i)
if (!seenOperandTypes.test(i) && !op.getOperand(i).name.empty())
variableTyResolver[op.getOperand(i).name] = {resolver, llvm::None};
if (includeResults) {
for (unsigned i = 0, e = op.getNumResults(); i != e; ++i)
if (!seenResultTypes.test(i) && !op.getResultName(i).empty())
variableTyResolver[op.getResultName(i)] = {resolver, llvm::None};
}
}
void FormatParser::handleTypesMatchConstraint(
llvm::StringMap<TypeResolutionInstance> &variableTyResolver,
llvm::Record def) {
StringRef lhsName = def.getValueAsString("lhs");
StringRef rhsName = def.getValueAsString("rhs");
StringRef transformer = def.getValueAsString("transformer");
if (ConstArgument arg = findSeenArg(lhsName))
variableTyResolver[rhsName] = {arg, transformer};
}
ConstArgument FormatParser::findSeenArg(StringRef name) {
if (const NamedTypeConstraint *arg = findArg(op.getOperands(), name))
return seenOperandTypes.test(arg - op.operand_begin()) ? arg : nullptr;
if (const NamedTypeConstraint *arg = findArg(op.getResults(), name))
return seenResultTypes.test(arg - op.result_begin()) ? arg : nullptr;
if (const NamedAttribute *attr = findArg(op.getAttributes(), name))
return seenAttrs.count(attr) ? attr : nullptr;
return nullptr;
}
LogicalResult FormatParser::parseElement(std::unique_ptr<Element> &element,
bool isTopLevel) {
// Directives.
if (curToken.isKeyword())
return parseDirective(element, isTopLevel);
// Literals.
if (curToken.getKind() == Token::literal)
return parseLiteral(element);
// Optionals.
if (curToken.getKind() == Token::l_paren)
return parseOptional(element, isTopLevel);
// Variables.
if (curToken.getKind() == Token::variable)
return parseVariable(element, isTopLevel);
return emitError(curToken.getLoc(),
"expected directive, literal, variable, or optional group");
}
LogicalResult FormatParser::parseVariable(std::unique_ptr<Element> &element,
bool isTopLevel) {
Token varTok = curToken;
consumeToken();
StringRef name = varTok.getSpelling().drop_front();
llvm::SMLoc loc = varTok.getLoc();
// Check that the parsed argument is something actually registered on the
// op.
/// Attributes
if (const NamedAttribute *attr = findArg(op.getAttributes(), name)) {
if (isTopLevel && !seenAttrs.insert(attr))
return emitError(loc, "attribute '" + name + "' is already bound");
element = std::make_unique<AttributeVariable>(attr);
return ::mlir::success();
}
/// Operands
if (const NamedTypeConstraint *operand = findArg(op.getOperands(), name)) {
if (isTopLevel) {
if (fmt.allOperands || !seenOperands.insert(operand).second)
return emitError(loc, "operand '" + name + "' is already bound");
}
element = std::make_unique<OperandVariable>(operand);
return ::mlir::success();
}
/// Regions
if (const NamedRegion *region = findArg(op.getRegions(), name)) {
if (!isTopLevel)
return emitError(loc, "regions can only be used at the top level");
if (hasAllRegions || !seenRegions.insert(region).second)
return emitError(loc, "region '" + name + "' is already bound");
element = std::make_unique<RegionVariable>(region);
return ::mlir::success();
}
/// Results.
if (const auto *result = findArg(op.getResults(), name)) {
if (isTopLevel)
return emitError(loc, "results can not be used at the top level");
element = std::make_unique<ResultVariable>(result);
return ::mlir::success();
}
/// Successors.
if (const auto *successor = findArg(op.getSuccessors(), name)) {
if (!isTopLevel)
return emitError(loc, "successors can only be used at the top level");
if (hasAllSuccessors || !seenSuccessors.insert(successor).second)
return emitError(loc, "successor '" + name + "' is already bound");
element = std::make_unique<SuccessorVariable>(successor);
return ::mlir::success();
}
return emitError(loc, "expected variable to refer to an argument, region, "
"result, or successor");
}
LogicalResult FormatParser::parseDirective(std::unique_ptr<Element> &element,
bool isTopLevel) {
Token dirTok = curToken;
consumeToken();
switch (dirTok.getKind()) {
case Token::kw_attr_dict:
return parseAttrDictDirective(element, dirTok.getLoc(), isTopLevel,
/*withKeyword=*/false);
case Token::kw_attr_dict_w_keyword:
return parseAttrDictDirective(element, dirTok.getLoc(), isTopLevel,
/*withKeyword=*/true);
case Token::kw_custom:
return parseCustomDirective(element, dirTok.getLoc(), isTopLevel);
case Token::kw_functional_type:
return parseFunctionalTypeDirective(element, dirTok, isTopLevel);
case Token::kw_operands:
return parseOperandsDirective(element, dirTok.getLoc(), isTopLevel);
case Token::kw_regions:
return parseRegionsDirective(element, dirTok.getLoc(), isTopLevel);
case Token::kw_results:
return parseResultsDirective(element, dirTok.getLoc(), isTopLevel);
case Token::kw_successors:
return parseSuccessorsDirective(element, dirTok.getLoc(), isTopLevel);
case Token::kw_type_ref:
return parseTypeDirective(element, dirTok, isTopLevel, /*isTypeRef=*/true);
case Token::kw_type:
return parseTypeDirective(element, dirTok, isTopLevel);
default:
llvm_unreachable("unknown directive token");
}
}
LogicalResult FormatParser::parseLiteral(std::unique_ptr<Element> &element) {
Token literalTok = curToken;
consumeToken();
StringRef value = literalTok.getSpelling().drop_front().drop_back();
// The parsed literal is a space element (`` or ` `).
if (value.empty() || (value.size() == 1 && value.front() == ' ')) {
element = std::make_unique<SpaceElement>(!value.empty());
return ::mlir::success();
}
// The parsed literal is a newline element.
if (value == "\\n") {
element = std::make_unique<NewlineElement>();
return ::mlir::success();
}
// Check that the parsed literal is valid.
if (!LiteralElement::isValidLiteral(value))
return emitError(literalTok.getLoc(), "expected valid literal");
element = std::make_unique<LiteralElement>(value);
return ::mlir::success();
}
LogicalResult FormatParser::parseOptional(std::unique_ptr<Element> &element,
bool isTopLevel) {
llvm::SMLoc curLoc = curToken.getLoc();
if (!isTopLevel)
return emitError(curLoc, "optional groups can only be used as top-level "
"elements");
consumeToken();
// Parse the child elements for this optional group.
std::vector<std::unique_ptr<Element>> elements;
Optional<unsigned> anchorIdx;
do {
if (failed(parseOptionalChildElement(elements, anchorIdx)))
return ::mlir::failure();
} while (curToken.getKind() != Token::r_paren);
consumeToken();
if (failed(parseToken(Token::question, "expected '?' after optional group")))
return ::mlir::failure();
// The optional group is required to have an anchor.
if (!anchorIdx)
return emitError(curLoc, "optional group specified no anchor element");
// The first parsable element of the group must be able to be parsed in an
// optional fashion.
auto parseBegin = llvm::find_if_not(elements, [](auto &element) {
return isa<WhitespaceElement>(element.get());
});
Element *firstElement = parseBegin->get();
if (!isa<AttributeVariable>(firstElement) &&
!isa<LiteralElement>(firstElement) &&
!isa<OperandVariable>(firstElement) && !isa<RegionVariable>(firstElement))
return emitError(curLoc,
"first parsable element of an operand group must be "
"an attribute, literal, operand, or region");
auto parseStart = parseBegin - elements.begin();
element = std::make_unique<OptionalElement>(std::move(elements), *anchorIdx,
parseStart);
return ::mlir::success();
}
LogicalResult FormatParser::parseOptionalChildElement(
std::vector<std::unique_ptr<Element>> &childElements,
Optional<unsigned> &anchorIdx) {
llvm::SMLoc childLoc = curToken.getLoc();
childElements.push_back({});
if (failed(parseElement(childElements.back(), /*isTopLevel=*/true)))
return ::mlir::failure();
// Check to see if this element is the anchor of the optional group.
bool isAnchor = curToken.getKind() == Token::caret;
if (isAnchor) {
if (anchorIdx)
return emitError(childLoc, "only one element can be marked as the anchor "
"of an optional group");
anchorIdx = childElements.size() - 1;
consumeToken();
}
return verifyOptionalChildElement(childElements.back().get(), childLoc,
isAnchor);
}
LogicalResult FormatParser::verifyOptionalChildElement(Element *element,
llvm::SMLoc childLoc,
bool isAnchor) {
return TypeSwitch<Element *, LogicalResult>(element)
// All attributes can be within the optional group, but only optional
// attributes can be the anchor.
.Case([&](AttributeVariable *attrEle) {
if (isAnchor && !attrEle->getVar()->attr.isOptional())
return emitError(childLoc, "only optional attributes can be used to "
"anchor an optional group");
return ::mlir::success();
})
// Only optional-like(i.e. variadic) operands can be within an optional
// group.
.Case<OperandVariable>([&](OperandVariable *ele) {
if (!ele->getVar()->isVariableLength())
return emitError(childLoc, "only variable length operands can be "
"used within an optional group");
return ::mlir::success();
})
// Only optional-like(i.e. variadic) results can be within an optional
// group.
.Case<ResultVariable>([&](ResultVariable *ele) {
if (!ele->getVar()->isVariableLength())
return emitError(childLoc, "only variable length results can be "
"used within an optional group");
return ::mlir::success();
})
.Case<RegionVariable>([&](RegionVariable *) {
// TODO: When ODS has proper support for marking "optional" regions, add
// a check here.
return ::mlir::success();
})
.Case<TypeDirective>([&](TypeDirective *ele) {
return verifyOptionalChildElement(ele->getOperand(), childLoc,
/*isAnchor=*/false);
})
.Case<FunctionalTypeDirective>([&](FunctionalTypeDirective *ele) {
if (failed(verifyOptionalChildElement(ele->getInputs(), childLoc,
/*isAnchor=*/false)))
return failure();
return verifyOptionalChildElement(ele->getResults(), childLoc,
/*isAnchor=*/false);
})
// Literals, whitespace, and custom directives may be used, but they can't
// anchor the group.
.Case<LiteralElement, WhitespaceElement, CustomDirective,
FunctionalTypeDirective, OptionalElement, TypeRefDirective>(
[&](Element *) {
if (isAnchor)
return emitError(childLoc, "only variables and types can be used "
"to anchor an optional group");
return ::mlir::success();
})
.Default([&](Element *) {
return emitError(childLoc, "only literals, types, and variables can be "
"used within an optional group");
});
}
LogicalResult
FormatParser::parseAttrDictDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel,
bool withKeyword) {
if (!isTopLevel)
return emitError(loc, "'attr-dict' directive can only be used as a "
"top-level directive");
if (hasAttrDict)
return emitError(loc, "'attr-dict' directive has already been seen");
hasAttrDict = true;
element = std::make_unique<AttrDictDirective>(withKeyword);
return ::mlir::success();
}
LogicalResult
FormatParser::parseCustomDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel) {
llvm::SMLoc curLoc = curToken.getLoc();
// Parse the custom directive name.
if (failed(
parseToken(Token::less, "expected '<' before custom directive name")))
return ::mlir::failure();
Token nameTok = curToken;
if (failed(parseToken(Token::identifier,
"expected custom directive name identifier")) ||
failed(parseToken(Token::greater,
"expected '>' after custom directive name")) ||
failed(parseToken(Token::l_paren,
"expected '(' before custom directive parameters")))
return ::mlir::failure();
// Parse the child elements for this optional group.=
std::vector<std::unique_ptr<Element>> elements;
do {
if (failed(parseCustomDirectiveParameter(elements)))
return ::mlir::failure();
if (curToken.getKind() != Token::comma)
break;
consumeToken();
} while (true);
if (failed(parseToken(Token::r_paren,
"expected ')' after custom directive parameters")))
return ::mlir::failure();
// After parsing all of the elements, ensure that all type directives refer
// only to variables.
for (auto &ele : elements) {
if (auto *typeEle = dyn_cast<TypeRefDirective>(ele.get())) {
if (!isa<OperandVariable, ResultVariable>(typeEle->getOperand())) {
return emitError(curLoc,
"type_ref directives within a custom directive "
"may only refer to variables");
}
}
if (auto *typeEle = dyn_cast<TypeDirective>(ele.get())) {
if (!isa<OperandVariable, ResultVariable>(typeEle->getOperand())) {
return emitError(curLoc, "type directives within a custom directive "
"may only refer to variables");
}
}
}
element = std::make_unique<CustomDirective>(nameTok.getSpelling(),
std::move(elements));
return ::mlir::success();
}
LogicalResult FormatParser::parseCustomDirectiveParameter(
std::vector<std::unique_ptr<Element>> &parameters) {
llvm::SMLoc childLoc = curToken.getLoc();
parameters.push_back({});
if (failed(parseElement(parameters.back(), /*isTopLevel=*/true)))
return ::mlir::failure();
// Verify that the element can be placed within a custom directive.
if (!isa<TypeRefDirective, TypeDirective, AttrDictDirective,
AttributeVariable, OperandVariable, RegionVariable,
SuccessorVariable>(parameters.back().get())) {
return emitError(childLoc, "only variables and types may be used as "
"parameters to a custom directive");
}
return ::mlir::success();
}
LogicalResult
FormatParser::parseFunctionalTypeDirective(std::unique_ptr<Element> &element,
Token tok, bool isTopLevel) {
llvm::SMLoc loc = tok.getLoc();
if (!isTopLevel)
return emitError(
loc, "'functional-type' is only valid as a top-level directive");
// Parse the main operand.
std::unique_ptr<Element> inputs, results;
if (failed(parseToken(Token::l_paren, "expected '(' before argument list")) ||
failed(parseTypeDirectiveOperand(inputs)) ||
failed(parseToken(Token::comma, "expected ',' after inputs argument")) ||
failed(parseTypeDirectiveOperand(results)) ||
failed(parseToken(Token::r_paren, "expected ')' after argument list")))
return ::mlir::failure();
element = std::make_unique<FunctionalTypeDirective>(std::move(inputs),
std::move(results));
return ::mlir::success();
}
LogicalResult
FormatParser::parseOperandsDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel) {
if (isTopLevel) {
if (fmt.allOperands || !seenOperands.empty())
return emitError(loc, "'operands' directive creates overlap in format");
fmt.allOperands = true;
}
element = std::make_unique<OperandsDirective>();
return ::mlir::success();
}
LogicalResult
FormatParser::parseRegionsDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel) {
if (!isTopLevel)
return emitError(loc, "'regions' is only valid as a top-level directive");
if (hasAllRegions || !seenRegions.empty())
return emitError(loc, "'regions' directive creates overlap in format");
hasAllRegions = true;
element = std::make_unique<RegionsDirective>();
return ::mlir::success();
}
LogicalResult
FormatParser::parseResultsDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel) {
if (isTopLevel)
return emitError(loc, "'results' directive can not be used as a "
"top-level directive");
element = std::make_unique<ResultsDirective>();
return ::mlir::success();
}
LogicalResult
FormatParser::parseSuccessorsDirective(std::unique_ptr<Element> &element,
llvm::SMLoc loc, bool isTopLevel) {
if (!isTopLevel)
return emitError(loc,
"'successors' is only valid as a top-level directive");
if (hasAllSuccessors || !seenSuccessors.empty())
return emitError(loc, "'successors' directive creates overlap in format");
hasAllSuccessors = true;
element = std::make_unique<SuccessorsDirective>();
return ::mlir::success();
}
LogicalResult
FormatParser::parseTypeDirective(std::unique_ptr<Element> &element, Token tok,
bool isTopLevel, bool isTypeRef) {
llvm::SMLoc loc = tok.getLoc();
if (!isTopLevel)
return emitError(loc, "'type' is only valid as a top-level directive");
std::unique_ptr<Element> operand;
if (failed(parseToken(Token::l_paren, "expected '(' before argument list")) ||
failed(parseTypeDirectiveOperand(operand, isTypeRef)) ||
failed(parseToken(Token::r_paren, "expected ')' after argument list")))
return ::mlir::failure();
if (isTypeRef)
element = std::make_unique<TypeRefDirective>(std::move(operand));
else
element = std::make_unique<TypeDirective>(std::move(operand));
return ::mlir::success();
}
LogicalResult
FormatParser::parseTypeDirectiveOperand(std::unique_ptr<Element> &element,
bool isTypeRef) {
llvm::SMLoc loc = curToken.getLoc();
if (failed(parseElement(element, /*isTopLevel=*/false)))
return ::mlir::failure();
if (isa<LiteralElement>(element.get()))
return emitError(
loc, "'type' directive operand expects variable or directive operand");
if (auto *var = dyn_cast<OperandVariable>(element.get())) {
unsigned opIdx = var->getVar() - op.operand_begin();
if (!isTypeRef && (fmt.allOperandTypes || seenOperandTypes.test(opIdx)))
return emitError(loc, "'type' of '" + var->getVar()->name +
"' is already bound");
if (isTypeRef && !(fmt.allOperandTypes || seenOperandTypes.test(opIdx)))
return emitError(loc, "'type_ref' of '" + var->getVar()->name +
"' is not bound by a prior 'type' directive");
seenOperandTypes.set(opIdx);
} else if (auto *var = dyn_cast<ResultVariable>(element.get())) {
unsigned resIdx = var->getVar() - op.result_begin();
if (!isTypeRef && (fmt.allResultTypes || seenResultTypes.test(resIdx)))
return emitError(loc, "'type' of '" + var->getVar()->name +
"' is already bound");
if (isTypeRef && !(fmt.allResultTypes || seenResultTypes.test(resIdx)))
return emitError(loc, "'type_ref' of '" + var->getVar()->name +
"' is not bound by a prior 'type' directive");
seenResultTypes.set(resIdx);
} else if (isa<OperandsDirective>(&*element)) {
if (!isTypeRef && (fmt.allOperandTypes || seenOperandTypes.any()))
return emitError(loc, "'operands' 'type' is already bound");
if (isTypeRef && !(fmt.allOperandTypes || seenOperandTypes.all()))
return emitError(
loc,
"'operands' 'type_ref' is not bound by a prior 'type' directive");
fmt.allOperandTypes = true;
} else if (isa<ResultsDirective>(&*element)) {
if (!isTypeRef && (fmt.allResultTypes || seenResultTypes.any()))
return emitError(loc, "'results' 'type' is already bound");
if (isTypeRef && !(fmt.allResultTypes || seenResultTypes.all()))
return emitError(
loc, "'results' 'type_ref' is not bound by a prior 'type' directive");
fmt.allResultTypes = true;
} else {
return emitError(loc, "invalid argument to 'type' directive");
}
return ::mlir::success();
}
//===----------------------------------------------------------------------===//
// Interface
//===----------------------------------------------------------------------===//
void mlir::tblgen::generateOpFormat(const Operator &constOp, OpClass &opClass) {
// TODO: Operator doesn't expose all necessary functionality via
// the const interface.
Operator &op = const_cast<Operator &>(constOp);
if (!op.hasAssemblyFormat())
return;
// Parse the format description.
llvm::SourceMgr mgr;
mgr.AddNewSourceBuffer(
llvm::MemoryBuffer::getMemBuffer(op.getAssemblyFormat()), llvm::SMLoc());
OperationFormat format(op);
if (failed(FormatParser(mgr, format, op).parse())) {
// Exit the process if format errors are treated as fatal.
if (formatErrorIsFatal) {
// Invoke the interrupt handlers to run the file cleanup handlers.
llvm::sys::RunInterruptHandlers();
std::exit(1);
}
return;
}
// Generate the printer and parser based on the parsed format.
format.genParser(op, opClass);
format.genPrinter(op, opClass);
}