mlir::Type Class Reference

Instances of the Type class are uniqued, have an immutable identifier and an optional mutable component. More...

#include "mlir/IR/Types.h"

Inheritance diagram for mlir::Type:

Public Types
template<typename ConcreteType , typename BaseType , typename StorageType , template< typename T > class... Traits>
using	TypeBase = detail::StorageUserBase< ConcreteType, BaseType, StorageType, detail::TypeUniquer, Traits... >
	Utility class for implementing types. More...
using	ImplType = TypeStorage
using	AbstractTy = AbstractType

Public Member Functions
constexpr	Type ()=default
	Type (const ImplType *impl)
	Type (const Type &other)=default
Type &	operator= (const Type &other)=default
bool	operator== (Type other) const
bool	operator!= (Type other) const
	operator bool () const
bool	operator! () const
template<typename... Tys>
bool	isa () const
template<typename... Tys>
bool	isa_and_nonnull () const
template<typename U >
U	dyn_cast () const
template<typename U >
U	dyn_cast_or_null () const
template<typename U >
U	cast () const
TypeID	getTypeID ()
	Return a unique identifier for the concrete type. More...
MLIRContext *	getContext () const
	Return the MLIRContext in which this type was uniqued. More...
Dialect &	getDialect () const
	Get the dialect this type is registered to. More...
bool	isIndex () const
bool	isFloat8E5M2 () const
bool	isFloat8E4M3FN () const
bool	isFloat8E5M2FNUZ () const
bool	isFloat8E4M3FNUZ () const
bool	isFloat8E4M3B11FNUZ () const
bool	isBF16 () const
bool	isF16 () const
bool	isF32 () const
bool	isF64 () const
bool	isF80 () const
bool	isF128 () const
bool	isInteger (unsigned width) const
	Return true if this is an integer type with the specified width. More...
bool	isSignlessInteger () const
	Return true if this is a signless integer type (with the specified width). More...
bool	isSignlessInteger (unsigned width) const
bool	isSignedInteger () const
	Return true if this is a signed integer type (with the specified width). More...
bool	isSignedInteger (unsigned width) const
bool	isUnsignedInteger () const
	Return true if this is an unsigned integer type (with the specified width). More...
bool	isUnsignedInteger (unsigned width) const
unsigned	getIntOrFloatBitWidth () const
	Return the bit width of an integer or a float type, assert failure on other types. More...
bool	isSignlessIntOrIndex () const
	Return true if this is a signless integer or index type. More...
bool	isSignlessIntOrIndexOrFloat () const
	Return true if this is a signless integer, index, or float type. More...
bool	isSignlessIntOrFloat () const
	Return true of this is a signless integer or a float type. More...
bool	isIntOrIndex () const
	Return true if this is an integer (of any signedness) or an index type. More...
bool	isIntOrFloat () const
	Return true if this is an integer (of any signedness) or a float type. More...
bool	isIntOrIndexOrFloat () const
	Return true if this is an integer (of any signedness), index, or float type. More...
void	print (raw_ostream &os) const
	Print the current type. More...
void	print (raw_ostream &os, AsmState &state) const
void	dump () const
const void *	getAsOpaquePointer () const
	Methods for supporting PointerLikeTypeTraits. More...
template<template< typename T > class Trait>
bool	hasTrait ()
	Returns true if the type was registered with a particular trait. More...
const AbstractTy &	getAbstractType () const
	Return the abstract type descriptor for this type. More...
ImplType *	getImpl () const
	Return the Type implementation. More...
void	walkImmediateSubElements (function_ref< void(Attribute)> walkAttrsFn, function_ref< void(Type)> walkTypesFn) const
	Walk all of the immediately nested sub-attributes and sub-types. More...
auto	replaceImmediateSubElements (ArrayRef< Attribute > replAttrs, ArrayRef< Type > replTypes) const
	Replace the immediately nested sub-attributes and sub-types with those provided. More...
template<WalkOrder Order = WalkOrder::PostOrder, typename... WalkFns>
auto	walk (WalkFns &&...walkFns)
	Walk this type and all attibutes/types nested within using the provided walk functions. More...
template<typename... ReplacementFns>
auto	replace (ReplacementFns &&...replacementFns)
	Recursively replace all of the nested sub-attributes and sub-types using the provided map functions. More...

Static Public Member Functions
static Type	getFromOpaquePointer (const void *pointer)

Protected Attributes
ImplType *	impl {nullptr}

Friends
::llvm::hash_code	hash_value (Type arg)

Detailed Description

Instances of the Type class are uniqued, have an immutable identifier and an optional mutable component.

They wrap a pointer to the storage object owned by MLIRContext. Therefore, instances of Type are passed around by value.

Some types are "primitives" meaning they do not have any parameters, for example the Index type. Parametric types have additional information that differentiates the types of the same class, for example the Integer type has bitwidth, making i8 and i16 belong to the same kind by be different instances of the IntegerType. Type parameters are part of the unique immutable key. The mutable component of the type can be modified after the type is created, but cannot affect the identity of the type.

Types are constructed and uniqued via the 'detail::TypeUniquer' class.

Derived type classes are expected to implement several required implementation hooks:

• Optional:
  • static LogicalResult verify( function_ref<InFlightDiagnostic()> emitError, Args... args)
    • This method is invoked when calling the 'TypeBase::get/getChecked' methods to ensure that the arguments passed in are valid to construct a type instance with.
    • This method is expected to return failure if a type cannot be constructed with 'args', success otherwise.
    • 'args' must correspond with the arguments passed into the 'TypeBase::get' call.

Type storage objects inherit from TypeStorage and contain the following:

• The dialect that defined the type.
• Any parameters of the type.
• An optional mutable component. For non-parametric types, a convenience DefaultTypeStorage is provided. Parametric storage types must derive TypeStorage and respect the following:
• Define a type alias, KeyTy, to a type that uniquely identifies the instance of the type.
  • The key type must be constructible from the values passed into the detail::TypeUniquer::get call.
  • If the KeyTy does not have an llvm::DenseMapInfo specialization, the storage class must define a hashing method: 'static unsigned hashKey(const KeyTy &)'
• Provide a method, 'bool operator==(const KeyTy &) const', to compare the storage instance against an instance of the key type.
• Provide a static construction method: 'DerivedStorage *construct(TypeStorageAllocator &, const KeyTy &key)' that builds a unique instance of the derived storage. The arguments to this function are an allocator to store any uniqued data within the context and the key type for this storage.
• If they have a mutable component, this component must not be a part of the key.

Definition at line 74 of file Types.h.

Member Typedef Documentation

AbstractTy

using mlir::Type::AbstractTy = AbstractType

Definition at line 84 of file Types.h.

ImplType

using mlir::Type::ImplType = TypeStorage

Definition at line 82 of file Types.h.

TypeBase

template<typename ConcreteType , typename BaseType , typename StorageType , template< typename T > class... Traits>

using mlir::Type::TypeBase = detail::StorageUserBase<ConcreteType, BaseType, StorageType, detail::TypeUniquer, Traits...>

Utility class for implementing types.

Definition at line 79 of file Types.h.

Constructor & Destructor Documentation

Type() [1/3]

constexpr mlir::Type::Type ( )

constexprdefault

Referenced by getFromOpaquePointer().

Type() [2/3]

mlir::Type::Type ( const ImplType *  impl )

inline

Definition at line 87 of file Types.h.

Type() [3/3]

mlir::Type::Type ( const Type &  other )

default

Member Function Documentation

cast()

template<typename U >

U mlir::Type::cast

Definition at line 321 of file Types.h.

Referenced by getCuSparseDataTypeFrom().

dump()

void Type::dump

(

)

const

Definition at line 3592 of file AsmPrinter.cpp.

dyn_cast()

template<typename U >

U mlir::Type::dyn_cast

Definition at line 311 of file Types.h.

dyn_cast_or_null()

template<typename U >

U mlir::Type::dyn_cast_or_null

Definition at line 316 of file Types.h.

getAbstractType()

const AbstractTy& mlir::Type::getAbstractType ( ) const

inline

Return the abstract type descriptor for this type.

Definition at line 189 of file Types.h.

Referenced by hasTrait(), replaceImmediateSubElements(), and walkImmediateSubElements().

getAsOpaquePointer()

const void* mlir::Type::getAsOpaquePointer ( ) const

inline

Methods for supporting PointerLikeTypeTraits.

Definition at line 175 of file Types.h.

References impl.

Referenced by llvm::PointerLikeTypeTraits< mlir::Type >::getAsVoidPointer().

getContext()

MLIRContext * Type::getContext

(

)

const

Return the MLIRContext in which this type was uniqued.

Definition at line 35 of file Types.cpp.

Referenced by combineOneSpec(), mlir::quant::fakeQuantAttrsToType(), mlir::gpu::MMAMatrixType::get(), mlir::spirv::MatrixType::get(), mlir::spirv::RuntimeArrayType::get(), mlir::spirv::CooperativeMatrixNVType::get(), mlir::spirv::JointMatrixINTELType::get(), mlir::spirv::ArrayType::get(), mlir::quant::CalibratedQuantizedType::get(), mlir::spirv::SampledImageType::get(), mlir::DataLayoutEntryAttr::get(), mlir::spirv::PointerType::get(), mlir::quant::UniformQuantizedPerAxisType::get(), mlir::quant::UniformQuantizedType::get(), mlir::quant::AnyQuantizedType::get(), mlir::sparse_tensor::get1DMemRefType(), mlir::gpu::MMAMatrixType::getChecked(), mlir::spirv::MatrixType::getChecked(), mlir::quant::CalibratedQuantizedType::getChecked(), mlir::spirv::SampledImageType::getChecked(), mlir::quant::UniformQuantizedPerAxisType::getChecked(), mlir::quant::UniformQuantizedType::getChecked(), mlir::quant::AnyQuantizedType::getChecked(), mlir::Value::getContext(), mlir::detail::getDefaultABIAlignment(), mlir::detail::getDefaultPreferredAlignment(), mlir::detail::getDefaultTypeSizeInBits(), getGetValueTypeOpValueType(), getI1SameShape(), mlir::bufferization::getMemRefTypeWithFullyDynamicLayout(), getPointerType(), getRegisterIndexToTileOffsetMap(), mlir::memref::getTensorTypeFromMemRefType(), getUnaryOpResultType(), getValAndBoolStructType(), inferIntrinsicResultType(), mlir::LLVM::isCompatibleType(), isSupportedElementType(), mlir::spirv::MemorySpaceToStorageClassConverter::MemorySpaceToStorageClassConverter(), mlir::populateAMDGPUToROCDLConversionPatterns(), mlir::UnrankedMemRefDescriptor::sizeBasePtr(), and mlir::arith::WideIntEmulationConverter::WideIntEmulationConverter().

getDialect()

Dialect Type::getDialect ( ) const

inline

Get the dialect this type is registered to.

Definition at line 118 of file Types.h.

Referenced by mlir::pdl::PDLType::classof(), mlir::quant::QuantizedType::classof(), mlir::spirv::SPIRVType::classof(), combineOneSpec(), mlir::TensorType::isValidElementType(), and parseAndVerifyType().

getFromOpaquePointer()

static Type mlir::Type::getFromOpaquePointer ( const void *  pointer )

inlinestatic

Definition at line 178 of file Types.h.

References Type().

Referenced by mlir::DiagnosticArgument::getAsType(), and llvm::PointerLikeTypeTraits< mlir::Type >::getFromVoidPointer().

getImpl()

ImplType* mlir::Type::getImpl ( ) const

inline

Return the Type implementation.

Definition at line 192 of file Types.h.

References impl.

Referenced by llvm::CastInfo< To, From, std::enable_if_t< std::is_same_v< mlir::Type, std::remove_const_t< From > >||std::is_base_of_v< mlir::Type, From > > >::doCast().

getIntOrFloatBitWidth()

unsigned Type::getIntOrFloatBitWidth

(

)

const

Return the bit width of an integer or a float type, assert failure on other types.

Definition at line 122 of file Types.cpp.

Referenced by areSameBitwidthScalarType(), buildAttributeAPInt(), createCtlzFunc(), createElementIPowIFunc(), declareReduction(), deduceCanonicalResource(), findEntryForIntegerType(), mlir::sparse_tensor::genIndexLoad(), getBitWidth(), mlir::spirv::ScalarType::getCapabilities(), mlir::detail::getDefaultTypeSizeInBits(), mlir::detail::getDenseElementBitWidth(), mlir::spirv::ScalarType::getExtensions(), mlir::Builder::getIntegerAttr(), mlir::nvgpu::getLaneIdAndValueIdToOperandCoord(), mlir::nvgpu::getLdMatrixParams(), getNumBits(), getRegisterIndexToTileOffsetMap(), getScalarOrElementWidth(), mlir::spirv::ScalarType::getSizeInBytes(), getTileShape(), getTypeNumBytes(), mlir::nvgpu::inferTileWidthInBits(), mlir::GPUPrintfOpToHIPLowering::matchAndRewrite(), mlir::detail::Parser::parseDenseArrayAttr(), and parseSwitchOpCases().

getTypeID()

TypeID mlir::Type::getTypeID ( )

inline

Return a unique identifier for the concrete type.

This is used to support dynamic type casting.

Definition at line 112 of file Types.h.

Referenced by mlir::DataLayout::getTypeABIAlignment(), mlir::DataLayout::getTypePreferredAlignment(), mlir::DataLayout::getTypeSize(), mlir::DataLayout::getTypeSizeInBits(), and mlir::DynamicType::isa().

hasTrait()

template<template< typename T > class Trait>

bool mlir::Type::hasTrait ( )

inline

Returns true if the type was registered with a particular trait.

Definition at line 184 of file Types.h.

References getAbstractType(), and mlir::AbstractType::hasTrait().

Referenced by mlir::DynamicType::classof().

isa()

template<typename... Tys>

bool mlir::Type::isa

Definition at line 301 of file Types.h.

Referenced by getCuSparseIndexTypeFrom().

isa_and_nonnull()

template<typename... Tys>

bool mlir::Type::isa_and_nonnull

Definition at line 306 of file Types.h.

Referenced by destructureIndices().

isBF16()

bool Type::isBF16

(

)

const

Definition at line 48 of file Types.cpp.

Referenced by fltSemanticsForType(), getCuSparseDataTypeFrom(), mlir::spirv::ScalarType::isValid(), mfmaOpToIntrinsic(), parseAndVerifyType(), and mlir::sparse_tensor::primaryTypeEncoding().

isF128()

bool Type::isF128

(

)

const

Definition at line 53 of file Types.cpp.

Referenced by fltSemanticsForType().

isF16()

bool Type::isF16

(

)

const

Definition at line 49 of file Types.cpp.

Referenced by floatCst(), fltSemanticsForType(), getCuSparseDataTypeFrom(), mlir::nvgpu::getMmaSyncRegisterType(), mlir::gpu::MMAMatrixType::isValidElementType(), mfmaOpToIntrinsic(), and mlir::sparse_tensor::primaryTypeEncoding().

isF32()

bool Type::isF32

(

)

const

Definition at line 50 of file Types.cpp.

Referenced by convertFloatAttr(), floatCst(), fltSemanticsForType(), getCuSparseDataTypeFrom(), mlir::nvgpu::getMmaSyncRegisterType(), mlir::gpu::MMAMatrixType::isValidElementType(), mfmaOpToIntrinsic(), and mlir::sparse_tensor::primaryTypeEncoding().

isF64()

bool Type::isF64

(

)

const

Definition at line 51 of file Types.cpp.

Referenced by fltSemanticsForType(), getCuSparseDataTypeFrom(), mlir::nvgpu::getMmaSyncRegisterType(), mfmaOpToIntrinsic(), and mlir::sparse_tensor::primaryTypeEncoding().

isF80()

bool Type::isF80

(

)

const

Definition at line 52 of file Types.cpp.

Referenced by fltSemanticsForType().

isFloat8E4M3B11FNUZ()

bool Type::isFloat8E4M3B11FNUZ

(

)

const

Definition at line 45 of file Types.cpp.

isFloat8E4M3FN()

bool Type::isFloat8E4M3FN

(

)

const

Definition at line 38 of file Types.cpp.

isFloat8E4M3FNUZ()

bool Type::isFloat8E4M3FNUZ

(

)

const

Definition at line 42 of file Types.cpp.

Referenced by mfmaOpToIntrinsic(), and mlir::populateAMDGPUToROCDLConversionPatterns().

isFloat8E5M2()

bool Type::isFloat8E5M2

(

)

const

Definition at line 37 of file Types.cpp.

isFloat8E5M2FNUZ()

bool Type::isFloat8E5M2FNUZ

(

)

const

Definition at line 39 of file Types.cpp.

Referenced by mfmaOpToIntrinsic(), and mlir::populateAMDGPUToROCDLConversionPatterns().

isIndex()

bool Type::isIndex

(

)

const

Definition at line 55 of file Types.cpp.

Referenced by areIndexCastCompatible(), assertValidValueDim(), buildAttributeAPInt(), ceilDivPositive(), mlir::ValueBoundsConstraintSet::computeBound(), mlir::convertScalarToDtype(), mlir::detail::getDenseElementBitWidth(), mlir::Builder::getIntegerAttr(), mlir::ConstantIntRanges::getStorageBitwidth(), mlir::getValueOrCreateCastToIndexLike(), getZero(), inferIndexCast(), isMatchingWidth(), mlir::affine::isValidDim(), isValidIntOrFloat(), mlir::affine::isValidSymbol(), mlir::affine::materializeComputedBound(), mlir::sparse_tensor::overheadTypeEncoding(), and reifyValueBound().

isInteger()

bool Type::isInteger

(

unsigned

width

)

const

Return true if this is an integer type with the specified width.

Definition at line 58 of file Types.cpp.

Referenced by castBoolToIntN(), castIntNToBool(), mlir::DenseElementsAttr::get(), getConstantUint32(), getCuSparseDataTypeFrom(), mlir::nvgpu::getMmaSyncRegisterType(), getScalarOrVectorI32Constant(), isBoolScalarOrVector(), isMatchingWidth(), mlir::DenseElementsAttr::isValidBool(), mlir::gpu::MMAMatrixType::isValidElementType(), mfmaOpToIntrinsic(), mlir::detail::Parser::parseDenseArrayAttr(), and mlir::sparse_tensor::primaryTypeEncoding().

isIntOrFloat()

bool Type::isIntOrFloat

(

)

const

Return true if this is an integer (of any signedness) or a float type.

Definition at line 116 of file Types.cpp.

Referenced by areSameBitwidthScalarType(), getBitWidth(), getScalarOrElementWidth(), isAllocationSupported(), mlir::spirv::SPIRVType::isScalarOrVector(), mlir::GPUPrintfOpToVPrintfLowering::matchAndRewrite(), and ConvertAccessChain::matchAndRewrite().

isIntOrIndex()

bool Type::isIntOrIndex

(

)

const

Return true if this is an integer (of any signedness) or an index type.

Definition at line 112 of file Types.cpp.

Referenced by mlir::sparse_tensor::genIsNonzero(), isSupportedCombiningKind(), and mlir::detail::Parser::parseDenseArrayAttr().

isIntOrIndexOrFloat()

bool Type::isIntOrIndexOrFloat

(

)

const

Return true if this is an integer (of any signedness), index, or float type.

Definition at line 120 of file Types.cpp.

Referenced by mlir::DenseElementsAttr::get(), getZero(), mlir::vector::isBroadcastableTo(), isSupportedCombiningKind(), isSupportedSourceType(), mlir::BaseMemRefType::isValidElementType(), mlir::detail::Parser::parseDenseArrayAttr(), and verifyRegionAttribute().

isSignedInteger() [1/2]

bool Type::isSignedInteger

(

)

const

Return true if this is a signed integer type (with the specified width).

Definition at line 76 of file Types.cpp.

Referenced by buildAttributeAPInt(), mlir::Builder::getIntegerAttr(), isSignedIntegerOrVector(), and mlir::gpu::MMAMatrixType::isValidElementType().

isSignedInteger() [2/2]

bool Type::isSignedInteger

(

unsigned

width

)

const

Definition at line 82 of file Types.cpp.

isSignlessInteger() [1/2]

bool Type::isSignlessInteger

(

)

const

Return true if this is a signless integer type (with the specified width).

Definition at line 64 of file Types.cpp.

Referenced by areIndexCastCompatible(), and mlir::arith::ConstantIntOp::build().

isSignlessInteger() [2/2]

bool Type::isSignlessInteger

(

unsigned

width

)

const

Definition at line 70 of file Types.cpp.

isSignlessIntOrFloat()

bool Type::isSignlessIntOrFloat

(

)

const

Return true of this is a signless integer or a float type.

Definition at line 108 of file Types.cpp.

isSignlessIntOrIndex()

bool Type::isSignlessIntOrIndex

(

)

const

Return true if this is a signless integer or index type.

Definition at line 100 of file Types.cpp.

isSignlessIntOrIndexOrFloat()

bool Type::isSignlessIntOrIndexOrFloat

(

)

const

Return true if this is a signless integer, index, or float type.

Definition at line 104 of file Types.cpp.

Referenced by appendMangledType().

isUnsignedInteger() [1/2]

bool Type::isUnsignedInteger

(

)

const

Return true if this is an unsigned integer type (with the specified width).

Definition at line 88 of file Types.cpp.

Referenced by isUnsignedIntegerOrVector(), mlir::gpu::MMAMatrixType::isValidElementType(), and mlir::detail::Parser::parseDecOrHexAttr().

isUnsignedInteger() [2/2]

bool Type::isUnsignedInteger

(

unsigned

width

)

const

Definition at line 94 of file Types.cpp.

operator bool()

mlir::Type::operator bool ( ) const

inlineexplicit

Definition at line 95 of file Types.h.

References impl.

operator!()

bool mlir::Type::operator! ( ) const

inline

Definition at line 97 of file Types.h.

operator!=()

bool mlir::Type::operator!= ( Type  other ) const

inline

Definition at line 94 of file Types.h.

operator=()

Type& mlir::Type::operator= ( const Type &  other )

default

operator==()

bool mlir::Type::operator== ( Type  other ) const

inline

Definition at line 93 of file Types.h.

References impl.

print() [1/2]

void Type::print

(

raw_ostream &

os

)

const

Print the current type.

Definition at line 3579 of file AsmPrinter.cpp.

Referenced by createCtlzFunc(), and mlir::operator<<().

print() [2/2]

void Type::print	(	raw_ostream &	os,
		AsmState &	state
	)		const

Definition at line 3588 of file AsmPrinter.cpp.

replace()

template<typename... ReplacementFns>

auto mlir::Type::replace ( ReplacementFns &&...  replacementFns )

inline

Recursively replace all of the nested sub-attributes and sub-types using the provided map functions.

Returns nullptr in the case of failure. See AttrTypeReplacer for information on the support replacement function types.

Definition at line 228 of file Types.h.

References mlir::AttrTypeReplacer::addReplacement(), and mlir::AttrTypeReplacer::replace().

replaceImmediateSubElements()

auto mlir::Type::replaceImmediateSubElements ( ArrayRef< Attribute >  replAttrs, ArrayRef< Type >  replTypes  ) const

inline

Replace the immediately nested sub-attributes and sub-types with those provided.

The order of the provided elements is derived from the order of the elements returned by the callbacks of walkImmediateSubElements. The element at index 0 would replace the very first attribute given by walkImmediateSubElements. On success, the new instance with the values replaced is returned. If replacement fails, nullptr is returned.

Definition at line 207 of file Types.h.

References getAbstractType(), and mlir::AbstractType::replaceImmediateSubElements().

walk()

template<WalkOrder Order = WalkOrder::PostOrder, typename... WalkFns>

auto mlir::Type::walk ( WalkFns &&...  walkFns )

inline

Walk this type and all attibutes/types nested within using the provided walk functions.

See AttrTypeWalker for information on the supported walk function types.

Definition at line 217 of file Types.h.

References mlir::AttrTypeWalker::addWalk(), and mlir::AttrTypeWalker::walk().

walkImmediateSubElements()

void mlir::Type::walkImmediateSubElements ( function_ref< void(Attribute)>  walkAttrsFn, function_ref< void(Type)>  walkTypesFn  ) const

inline

Walk all of the immediately nested sub-attributes and sub-types.

This method does not recurse into sub elements.

Definition at line 196 of file Types.h.

References getAbstractType(), and mlir::AbstractType::walkImmediateSubElements().

Friends And Related Function Documentation

hash_value

::llvm::hash_code hash_value ( Type  arg )

friend

Definition at line 296 of file Types.h.

Member Data Documentation

impl

ImplType* mlir::Type::impl {nullptr}

protected

Definition at line 236 of file Types.h.

Referenced by getAsOpaquePointer(), getImpl(), operator bool(), and operator==().

---

The documentation for this class was generated from the following files:

• include/mlir/IR/Types.h
• lib/IR/AsmPrinter.cpp
• lib/IR/Types.cpp
• lib/TableGen/Type.cpp
• lib/Tools/PDLL/AST/NodePrinter.cpp