Implementation of CFGToSCFInterface used to lift Control Flow Dialect operations to SCF Dialect operations. More...

#include "mlir/Conversion/ControlFlowToSCF/ControlFlowToSCF.h"

Inheritance diagram for mlir::ControlFlowToSCFTransformation:

Public Member Functions
FailureOr< Operation * >	createStructuredBranchRegionOp (OpBuilder &builder, Operation *controlFlowCondOp, TypeRange resultTypes, MutableArrayRef< Region > regions) override
	Creates an `scf.if` op if `controlFlowCondOp` is a `cf.cond_br` op or an `scf.index_switch` if `controlFlowCondOp` is a `cf.switch`. More...

LogicalResult	createStructuredBranchRegionTerminatorOp (Location loc, OpBuilder &builder, Operation branchRegionOp, Operation replacedControlFlowOp, ValueRange results) override
	Creates an `scf.yield` op returning the given results. More...

FailureOr< Operation * >	createStructuredDoWhileLoopOp (OpBuilder &builder, Operation *replacedOp, ValueRange loopVariablesInit, Value condition, ValueRange loopVariablesNextIter, Region &&loopBody) override
	Creates an `scf.while` op. More...

Value	getCFGSwitchValue (Location loc, OpBuilder &builder, unsigned value) override
	Creates an `arith.constant` with an i32 attribute of the given value. More...

void	createCFGSwitchOp (Location loc, OpBuilder &builder, Value flag, ArrayRef< unsigned > caseValues, BlockRange caseDestinations, ArrayRef< ValueRange > caseArguments, Block *defaultDest, ValueRange defaultArgs) override
	Creates a `cf.switch` op with the given cases and flag. More...

Value	getUndefValue (Location loc, OpBuilder &builder, Type type) override
	Creates a `ub.poison` op of the given type. More...

FailureOr< Operation * >	createUnreachableTerminator (Location loc, OpBuilder &builder, Region &region) override
	Creates a `func.return` op with poison for each of the return values of the function. More...

Public Member Functions inherited from mlir::CFGToSCFInterface
virtual	~CFGToSCFInterface ()=default

void	createSingleDestinationBranch (Location loc, OpBuilder &builder, Value dummyFlag, Block *destination, ValueRange arguments)
	Helper function to create an unconditional branch using `createCFGSwitchOp`. More...

void	createConditionalBranch (Location loc, OpBuilder &builder, Value condition, Block trueDest, ValueRange trueArgs, Block falseDest, ValueRange falseArgs)
	Helper function to create a conditional branch using `createCFGSwitchOp`. More...

Detailed Description

Implementation of CFGToSCFInterface used to lift Control Flow Dialect operations to SCF Dialect operations.

Definition at line 25 of file ControlFlowToSCF.h.

Member Function Documentation

◆ createCFGSwitchOp()

void ControlFlowToSCFTransformation::createCFGSwitchOp	(	Location	loc,
		OpBuilder &	builder,
		Value	flag,
		ArrayRef< unsigned >	caseValues,
		BlockRange	caseDestinations,
		ArrayRef< ValueRange >	caseArguments,
		Block *	defaultDest,
		ValueRange	defaultArgs
	)

overridevirtual

Creates a cf.switch op with the given cases and flag.

Implements mlir::CFGToSCFInterface.

Definition at line 116 of file ControlFlowToSCF.cpp.

References mlir::OpBuilder::create().

◆ createStructuredBranchRegionOp()

FailureOr< Operation * > ControlFlowToSCFTransformation::createStructuredBranchRegionOp	(	OpBuilder &	builder,
		Operation *	controlFlowCondOp,
		TypeRange	resultTypes,
		MutableArrayRef< Region >	regions
	)

overridevirtual

Creates an scf.if op if controlFlowCondOp is a cf.cond_br op or an scf.index_switch if controlFlowCondOp is a cf.switch.

Returns failure otherwise.

Implements mlir::CFGToSCFInterface.

Definition at line 32 of file ControlFlowToSCF.cpp.

References mlir::OpBuilder::create(), mlir::Operation::emitOpError(), mlir::Builder::getIndexType(), and mlir::Operation::getLoc().

◆ createStructuredBranchRegionTerminatorOp()

LogicalResult ControlFlowToSCFTransformation::createStructuredBranchRegionTerminatorOp	(	Location	loc,
		OpBuilder &	builder,
		Operation *	branchRegionOp,
		Operation *	replacedControlFlowOp,
		ValueRange	results
	)

overridevirtual

Creates an scf.yield op returning the given results.

Implements mlir::CFGToSCFInterface.

Definition at line 76 of file ControlFlowToSCF.cpp.

References mlir::OpBuilder::create().

◆ createStructuredDoWhileLoopOp()

FailureOr< Operation * > ControlFlowToSCFTransformation::createStructuredDoWhileLoopOp	(	OpBuilder &	builder,
		Operation *	replacedOp,
		ValueRange	loopVariablesInit,
		Value	condition,
		ValueRange	loopVariablesNextIter,
		Region &&	loopBody
	)

overridevirtual

Creates an scf.while op.

The loop body is made the before-region of the while op and terminated with an scf.condition op. The after-region does nothing but forward the iteration variables.

Implements mlir::CFGToSCFInterface.

Definition at line 84 of file ControlFlowToSCF.cpp.

References mlir::Block::addArguments(), mlir::OpBuilder::create(), mlir::OpBuilder::createBlock(), mlir::Block::getArguments(), mlir::Builder::getI1Type(), mlir::Operation::getLoc(), mlir::ValueRange::getTypes(), and mlir::OpBuilder::setInsertionPointToEnd().

◆ createUnreachableTerminator()

FailureOr< Operation * > ControlFlowToSCFTransformation::createUnreachableTerminator	(	Location	loc,
		OpBuilder &	builder,
		Region &	region
	)

overridevirtual

Creates a func.return op with poison for each of the return values of the function.

It is guaranteed to be directly within the function body. TODO: This can be made independent of the func dialect once the UB dialect has a ub.unreachable op.

Implements mlir::CFGToSCFInterface.

Definition at line 133 of file ControlFlowToSCF.cpp.

References mlir::OpBuilder::create(), mlir::emitError(), mlir::Operation::getName(), and mlir::Region::getParentOp().