MLIR
22.0.0git
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Type conversion class. More...
#include "mlir/Transforms/DialectConversion.h"
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class | AttributeConversionResult |
The general result of a type attribute conversion callback, allowing for early termination. More... | |
class | SignatureConversion |
This class provides all of the information necessary to convert a type signature. More... | |
Public Member Functions | |
virtual | ~TypeConverter ()=default |
TypeConverter ()=default | |
TypeConverter (const TypeConverter &other) | |
TypeConverter & | operator= (const TypeConverter &other) |
template<typename FnT , typename T = typename llvm::function_traits< std::decay_t<FnT>>::template arg_t<0>> | |
void | addConversion (FnT &&callback) |
Register a conversion function. More... | |
template<typename FnT , typename T = typename llvm::function_traits< std::decay_t<FnT>>::template arg_t<1>> | |
void | addSourceMaterialization (FnT &&callback) |
All of the following materializations require function objects that are convertible to the following form: Value(OpBuilder &, T, ValueRange, Location) , where T is any subclass of Type . More... | |
template<typename FnT , typename T = typename llvm::function_traits< std::decay_t<FnT>>::template arg_t<1>> | |
void | addTargetMaterialization (FnT &&callback) |
This method registers a materialization that will be called when converting a value to a target type according to a pattern's type converter. More... | |
template<typename FnT , typename T = typename llvm::function_traits<std::decay_t<FnT>>::template arg_t<0>, typename A = typename llvm::function_traits<std::decay_t<FnT>>::template arg_t<1>> | |
void | addTypeAttributeConversion (FnT &&callback) |
Register a conversion function for attributes within types. More... | |
LogicalResult | convertType (Type t, SmallVectorImpl< Type > &results) const |
Convert the given type. More... | |
LogicalResult | convertType (Value v, SmallVectorImpl< Type > &results) const |
Convert the type of the given value. More... | |
Type | convertType (Type t) const |
This hook simplifies defining 1-1 type conversions. More... | |
Type | convertType (Value v) const |
template<typename TargetType > | |
TargetType | convertType (Type t) const |
Attempts a 1-1 type conversion, expecting the result type to be TargetType . More... | |
template<typename TargetType > | |
TargetType | convertType (Value v) const |
LogicalResult | convertTypes (TypeRange types, SmallVectorImpl< Type > &results) const |
Convert the given types, filling 'results' as necessary. More... | |
LogicalResult | convertTypes (ValueRange values, SmallVectorImpl< Type > &results) const |
Convert the types of the given values, filling 'results' as necessary. More... | |
bool | isLegal (Type type) const |
Return true if the given type is legal for this type converter, i.e. More... | |
bool | isLegal (Value value) const |
bool | isLegal (TypeRange range) const |
Return true if all of the given types are legal for this type converter. More... | |
bool | isLegal (ValueRange range) const |
bool | isLegal (Operation *op) const |
Return true if the given operation has legal operand and result types. More... | |
bool | isLegal (Region *region) const |
Return true if the types of block arguments within the region are legal. More... | |
bool | isSignatureLegal (FunctionType ty) const |
Return true if the inputs and outputs of the given function type are legal. More... | |
LogicalResult | convertSignatureArg (unsigned inputNo, Type type, SignatureConversion &result) const |
This method allows for converting a specific argument of a signature. More... | |
LogicalResult | convertSignatureArgs (TypeRange types, SignatureConversion &result, unsigned origInputOffset=0) const |
LogicalResult | convertSignatureArg (unsigned inputNo, Value value, SignatureConversion &result) const |
LogicalResult | convertSignatureArgs (ValueRange values, SignatureConversion &result, unsigned origInputOffset=0) const |
std::optional< SignatureConversion > | convertBlockSignature (Block *block) const |
This function converts the type signature of the given block, by invoking 'convertSignatureArg' for each argument. More... | |
Value | materializeSourceConversion (OpBuilder &builder, Location loc, Type resultType, ValueRange inputs) const |
Materialize a conversion from a set of types into one result type by generating a cast sequence of some kind. More... | |
Value | materializeTargetConversion (OpBuilder &builder, Location loc, Type resultType, ValueRange inputs, Type originalType={}) const |
SmallVector< Value > | materializeTargetConversion (OpBuilder &builder, Location loc, TypeRange resultType, ValueRange inputs, Type originalType={}) const |
std::optional< Attribute > | convertTypeAttribute (Type type, Attribute attr) const |
Convert an attribute present attr from within the type type using the registered conversion functions. More... | |
Type conversion class.
Specific conversions and materializations can be registered using addConversion and addMaterialization, respectively.
Definition at line 41 of file DialectConversion.h.
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Definition at line 46 of file DialectConversion.h.
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Register a conversion function.
A conversion function must be convertible to any of the following forms (where T
is Value
or a class derived from Type
, including Type
itself):
std::nullopt
to signify failure. If std::nullopt
is returned, the converter is allowed to try another conversion function to perform the conversion.failure
or std::nullopt
to signify a failed conversion. If the new set of types is empty, the type is removed and any usages of the existing value are expected to be removed during conversion. If std::nullopt
is returned, the converter is allowed to try another conversion function to perform the conversion.Conversion functions that accept Value
as the first argument are context-aware. I.e., they can take into account IR when converting the type of the given value. Context-unaware conversion functions accept Type
or a derived class as the first argument.
Note: Context-unaware conversions are cached, but context-aware conversions are not.
Note: When attempting to convert a type, e.g. via 'convertType', the mostly recently added conversions will be invoked first.
Definition at line 170 of file DialectConversion.h.
Referenced by addOpaquePointerConversion(), mlir::configureGpuToNVVMTypeConverter(), mlir::xegpu::doSCFStructuralTypeConversionWithTensorType(), mlir::LLVMTypeConverter::LLVMTypeConverter(), mlir::spirv::MemorySpaceToStorageClassConverter::MemorySpaceToStorageClassConverter(), mlir::arith::NarrowTypeEmulationConverter::NarrowTypeEmulationConverter(), mlir::populateAMXLegalizeForLLVMExportPatterns(), mlir::populateArmSMEToLLVMConversionPatterns(), mlir::populateAsyncStructuralTypeConversionsAndLegality(), mlir::populateEmitCSizeTTypeConversions(), mlir::arith::populateEmulateUnsupportedFloatsConversions(), mlir::math::populateExtendToSupportedTypesTypeConverter(), mlir::memref::populateMemRefNarrowTypeEmulationConversions(), mlir::populateMemRefToEmitCTypeConversion(), mlir::memref::populateMemRefWideIntEmulationConversions(), mlir::populateMMAToSPIRVCoopMatrixTypeConversion(), mlir::mpi::populateMPIToLLVMConversionPatterns(), mlir::populateOpenMPToLLVMConversionPatterns(), mlir::ptr::populatePtrToLLVMConversionPatterns(), mlir::populateSPIRVToLLVMTypeConversion(), mlir::tosa::populateTosaTypeConversion(), mlir::SPIRVTypeConverter::SPIRVTypeConverter(), and mlir::arith::WideIntEmulationConverter::WideIntEmulationConverter().
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All of the following materializations require function objects that are convertible to the following form: Value(OpBuilder &, T, ValueRange, Location)
, where T
is any subclass of Type
.
This function is responsible for creating an operation, using the OpBuilder and Location provided, that "casts" a range of values into a single value of the given type T
. It must return a Value of the type T
on success and nullptr
if it failed but other materialization should be attempted. Materialization functions must be provided when a type conversion may persist after the conversion has finished.
Note: Target materializations may optionally accept an additional Type parameter, which is the original type of the SSA value. Furthermore, T
can be a TypeRange; in that case, the function must return a SmallVector<Value>. This method registers a materialization that will be called when converting a replacement value back to its original source type. This is used when some uses of the original value persist beyond the main conversion.
Definition at line 196 of file DialectConversion.h.
Referenced by mlir::xegpu::doSCFStructuralTypeConversionWithTensorType(), mlir::LLVMTypeConverter::LLVMTypeConverter(), mlir::populateEmitCSizeTTypeConversions(), mlir::populateMemRefToEmitCTypeConversion(), mlir::tosa::populateTosaTypeConversion(), and mlir::SPIRVTypeConverter::SPIRVTypeConverter().
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This method registers a materialization that will be called when converting a value to a target type according to a pattern's type converter.
Note: Target materializations can optionally inspect the "original" type. This type may be different from the type of the input value. For example, let's assume that a conversion pattern "P1" replaced an SSA value "v1" (type "t1") with "v2" (type "t2"). Then a different conversion pattern "P2" matches an op that has "v1" as an operand. Let's furthermore assume that "P2" determines that the converted target type of "t1" is "t3", which may be different from "t2". In this example, the target materialization will be invoked with: outputType = "t3", inputs = "v2", originalType = "t1". Note that the original type "t1" cannot be recovered from just "t3" and "v2"; that's why the originalType parameter exists.
Note: During a 1:N conversion, the result types can be a TypeRange. In that case the materialization produces a SmallVector<Value>.
Definition at line 220 of file DialectConversion.h.
Referenced by mlir::xegpu::doSCFStructuralTypeConversionWithTensorType(), mlir::LLVMTypeConverter::LLVMTypeConverter(), mlir::populateEmitCSizeTTypeConversions(), mlir::arith::populateEmulateUnsupportedFloatsConversions(), mlir::math::populateExtendToSupportedTypesTypeConverter(), mlir::populateMemRefToEmitCTypeConversion(), mlir::tosa::populateTosaTypeConversion(), and mlir::SPIRVTypeConverter::SPIRVTypeConverter().
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Register a conversion function for attributes within types.
Type converters may call this function in order to allow hoking into the translation of attributes that exist within types. For example, a type converter for the memref
type could use these conversions to convert memory spaces or layouts in an extensible way.
The conversion functions take a non-null Type or subclass of Type and a non-null Attribute (or subclass of Attribute), and returns a AttributeConversionResult
. This result can either contain an Attribute
, which may be nullptr
, representing the conversion's success, AttributeConversionResult::na()
(the default empty value), indicating that the conversion function did not apply and that further conversion functions should be checked, or AttributeConversionResult::abort()
indicating that the conversion process should be aborted.
Registered conversion functions are callled in the reverse of the order in which they were registered.
Definition at line 249 of file DialectConversion.h.
Referenced by mlir::LLVMTypeConverter::LLVMTypeConverter(), mlir::populateAMDGPUMemorySpaceAttributeConversions(), mlir::populateGpuMemorySpaceAttributeConversions(), and mlir::ptr::populatePtrToLLVMConversionPatterns().
std::optional< TypeConverter::SignatureConversion > TypeConverter::convertBlockSignature | ( | Block * | block | ) | const |
This function converts the type signature of the given block, by invoking 'convertSignatureArg' for each argument.
This function should return a valid conversion for the signature on success, std::nullopt otherwise.
Definition at line 3588 of file DialectConversion.cpp.
References convertSignatureArgs(), mlir::remark::failed(), mlir::Block::getArguments(), and mlir::Block::getNumArguments().
Referenced by mlir::detail::ConversionPatternRewriterImpl::convertRegionTypes().
LogicalResult TypeConverter::convertSignatureArg | ( | unsigned | inputNo, |
Type | type, | ||
SignatureConversion & | result | ||
) | const |
This method allows for converting a specific argument of a signature.
It takes as inputs the original argument input number, type. On success, it populates 'result' with any new mappings.
Definition at line 3498 of file DialectConversion.cpp.
References mlir::TypeConverter::SignatureConversion::addInputs(), convertType(), and mlir::remark::failed().
Referenced by convertSignatureArgs().
LogicalResult TypeConverter::convertSignatureArg | ( | unsigned | inputNo, |
Value | value, | ||
SignatureConversion & | result | ||
) | const |
Definition at line 3523 of file DialectConversion.cpp.
References mlir::TypeConverter::SignatureConversion::addInputs(), convertType(), and mlir::remark::failed().
LogicalResult TypeConverter::convertSignatureArgs | ( | TypeRange | types, |
SignatureConversion & | result, | ||
unsigned | origInputOffset = 0 |
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) | const |
Definition at line 3514 of file DialectConversion.cpp.
References convertSignatureArg(), and mlir::remark::failed().
Referenced by convertBlockSignature(), and convertFuncOpTypes().
LogicalResult TypeConverter::convertSignatureArgs | ( | ValueRange | values, |
SignatureConversion & | result, | ||
unsigned | origInputOffset = 0 |
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) | const |
Definition at line 3539 of file DialectConversion.cpp.
References convertSignatureArg(), and mlir::remark::failed().
This hook simplifies defining 1-1 type conversions.
This function returns the type to convert to on success, and a null type on failure.
Definition at line 3434 of file DialectConversion.cpp.
References convertType(), and mlir::remark::failed().
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Attempts a 1-1 type conversion, expecting the result type to be TargetType
.
Returns the converted type cast to TargetType
on success, and a null type on conversion or cast failure.
Definition at line 281 of file DialectConversion.h.
References convertType().
LogicalResult TypeConverter::convertType | ( | Type | t, |
SmallVectorImpl< Type > & | results | ||
) | const |
Convert the given type.
This function returns failure if no valid conversion exists, success otherwise. If the new set of types is empty, the type is removed and any usages of the existing value are expected to be removed during conversion.
Note: This overload invokes only context-unaware type conversion functions. Users should call the other overload if possible.
Definition at line 3361 of file DialectConversion.cpp.
References mlir::Type::getContext(), and mlir::MLIRContext::isMultithreadingEnabled().
Referenced by adjustAccessChainForBitwidth(), broadcast(), convertArrayType(), mlir::spirv::convertMemRefTypesAndAttrs(), convertRuntimeArrayType(), convertSignatureArg(), convertType(), convertTypes(), mlir::ConvertToLLVMPattern::createMemRefDescriptor(), emitElementwiseComputation(), mlir::ConvertToLLVMPattern::getMemRefDescriptorSizes(), mlir::ConvertToLLVMPattern::getSizeInBytes(), mlir::ConvertToLLVMPattern::isConvertibleAndHasIdentityMaps(), isLegal(), legalizeBlockArguments(), lowerAsEntryFunction(), mlir::GPUDynamicSharedMemoryOpLowering::matchAndRewrite(), mlir::GPUFuncOpLowering::matchAndRewrite(), mlir::GPUPrintfOpToHIPLowering::matchAndRewrite(), mlir::GPUPrintfOpToLLVMCallLowering::matchAndRewrite(), mlir::GPUPrintfOpToVPrintfLowering::matchAndRewrite(), mlir::spirv::ElementwiseOpPattern< Op, SPIRVOp >::matchAndRewrite(), mlir::populateAsyncStructuralTypeConversionsAndLegality(), mlir::populateMemRefToEmitCTypeConversion(), mlir::memref::populateMemRefWideIntEmulationConversions(), mlir::tosa::populateTosaTypeConversion(), mlir::detail::ConversionPatternRewriterImpl::remapValues(), replaceWithLoadOrStore(), and wmmaPushInputOperand().
Definition at line 3444 of file DialectConversion.cpp.
References convertType(), and mlir::remark::failed().
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Definition at line 285 of file DialectConversion.h.
References convertType().
LogicalResult TypeConverter::convertType | ( | Value | v, |
SmallVectorImpl< Type > & | results | ||
) | const |
Convert the type of the given value.
This function returns failure if no valid conversion exists, success otherwise. If the new set of types is empty, the type is removed and any usages of the existing value are expected to be removed during conversion.
Note: This overload invokes both context-aware and context-unaware type conversion functions.
Definition at line 3413 of file DialectConversion.cpp.
References convertType(), and mlir::Value::getType().
Convert an attribute present attr
from within the type type
using the registered conversion functions.
If no applicable conversion has been registered, return std::nullopt. Note that the empty attribute/nullptr
is a valid return value for this function.
Definition at line 3631 of file DialectConversion.cpp.
References mlir::TypeConverter::AttributeConversionResult::getResult(), mlir::TypeConverter::AttributeConversionResult::hasResult(), and mlir::TypeConverter::AttributeConversionResult::isAbort().
Referenced by mlir::LLVMTypeConverter::getMemRefAddressSpace(), and mlir::ptr::populatePtrToLLVMConversionPatterns().
LogicalResult TypeConverter::convertTypes | ( | TypeRange | types, |
SmallVectorImpl< Type > & | results | ||
) | const |
Convert the given types, filling 'results' as necessary.
This returns "failure" if the conversion of any of the types fails, "success" otherwise.
Definition at line 3455 of file DialectConversion.cpp.
References convertType(), and mlir::remark::failed().
Referenced by convertFuncOpTypes(), mlir::convertOpResultTypes(), convertStructTypePacked(), convertStructTypeWithOffset(), mlir::LLVMTypeConverter::LLVMTypeConverter(), mlir::arith::NarrowTypeEmulationConverter::NarrowTypeEmulationConverter(), mlir::registerConversionPDLFunctions(), and mlir::arith::WideIntEmulationConverter::WideIntEmulationConverter().
LogicalResult TypeConverter::convertTypes | ( | ValueRange | values, |
SmallVectorImpl< Type > & | results | ||
) | const |
Convert the types of the given values, filling 'results' as necessary.
This returns "failure" if the conversion of any of the types fails, "success" otherwise.
Definition at line 3464 of file DialectConversion.cpp.
References convertType(), and mlir::remark::failed().
bool TypeConverter::isLegal | ( | Operation * | op | ) | const |
Return true if the given operation has legal operand and result types.
Definition at line 3480 of file DialectConversion.cpp.
References mlir::Operation::getOperands(), mlir::Operation::getResults(), and isLegal().
bool TypeConverter::isLegal | ( | Region * | region | ) | const |
Return true if the types of block arguments within the region are legal.
Definition at line 3484 of file DialectConversion.cpp.
References mlir::Block::getArguments(), and isLegal().
bool TypeConverter::isLegal | ( | Type | type | ) | const |
Return true if the given type is legal for this type converter, i.e.
the type converts to itself.
Definition at line 3472 of file DialectConversion.cpp.
References convertType().
Referenced by mlir::configureOpenMPToLLVMConversionLegality(), mlir::convertOpResultTypes(), isLegal(), mlir::isLegalForBranchOpInterfaceTypeConversionPattern(), mlir::isLegalForReturnOpTypeConversionPattern(), isSignatureLegal(), legalizeBlockArguments(), mlir::populateAsyncStructuralTypeConversionsAndLegality(), mlir::arith::populateEmulateUnsupportedFloatsLegality(), mlir::math::populateExtendToSupportedTypesConversionTarget(), and mlir::scf::populateSCFStructuralTypeConversionTarget().
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Return true if all of the given types are legal for this type converter.
Definition at line 307 of file DialectConversion.h.
References isLegal().
bool TypeConverter::isLegal | ( | Value | value | ) | const |
Definition at line 3476 of file DialectConversion.cpp.
References convertType(), and mlir::Value::getType().
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Definition at line 310 of file DialectConversion.h.
References isLegal().
bool TypeConverter::isSignatureLegal | ( | FunctionType | ty | ) | const |
Return true if the inputs and outputs of the given function type are legal.
Definition at line 3489 of file DialectConversion.cpp.
References isLegal().
Value TypeConverter::materializeSourceConversion | ( | OpBuilder & | builder, |
Location | loc, | ||
Type | resultType, | ||
ValueRange | inputs | ||
) | const |
Materialize a conversion from a set of types into one result type by generating a cast sequence of some kind.
See the respective add*Materialization
for more information on the context for these methods.
Definition at line 3548 of file DialectConversion.cpp.
Referenced by legalizeBlockArguments().
Value TypeConverter::materializeTargetConversion | ( | OpBuilder & | builder, |
Location | loc, | ||
Type | resultType, | ||
ValueRange | inputs, | ||
Type | originalType = {} |
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) | const |
Definition at line 3558 of file DialectConversion.cpp.
SmallVector< Value > TypeConverter::materializeTargetConversion | ( | OpBuilder & | builder, |
Location | loc, | ||
TypeRange | resultType, | ||
ValueRange | inputs, | ||
Type | originalType = {} |
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) | const |
Definition at line 3570 of file DialectConversion.cpp.
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Definition at line 51 of file DialectConversion.h.