sdfg::transformations::UnrollTransform Class Reference

Marks a constant-trip loop for full unrolling. More...

#include <sdfg/transformations/unroll_transform.h>

Inheritance diagram for sdfg::transformations::UnrollTransform:

Public Member Functions
	UnrollTransform (structured_control_flow::StructuredLoop &loop)
virtual std::string	name () const override
	Get the name of this transformation.
virtual bool	can_be_applied (builder::StructuredSDFGBuilder &builder, analysis::AnalysisManager &analysis_manager) override
	Check if this transformation can be safely applied.
virtual void	apply (builder::StructuredSDFGBuilder &builder, analysis::AnalysisManager &analysis_manager) override
	Apply this transformation to the SDFG.
virtual void	to_json (nlohmann::json &j) const override
	Serialize this transformation to JSON.
Public Member Functions inherited from sdfg::transformations::Transformation
virtual	~Transformation ()=default
virtual void	set_report (PassReportConsumer *report)
	Set the report consumer for transformation feedback.
virtual bool	try_apply (builder::StructuredSDFGBuilder &builder, analysis::AnalysisManager &analysis_manager)
	Attempt to apply the transformation if possible.

Static Public Member Functions
static UnrollTransform	from_json (builder::StructuredSDFGBuilder &builder, const nlohmann::json &j)

Additional Inherited Members
Protected Attributes inherited from sdfg::transformations::Transformation
PassReportConsumer *	report_ = nullptr

Detailed Description

Marks a constant-trip loop for full unrolling.

Sets the "unroll" property on the loop's existing schedule (preserving its kind, e.g. SEQUENTIAL / CUDA), which the loop codegen lowers to #pragma clang loop unroll(full). Full unrolling of the constant-trip loops that index a register tile is what lets the compiler scalarize the tile into registers (instead of spilling it to local memory).

Only applicable to loops with a provably constant (positive integer) trip count, so unroll(full) is never emitted on a variable-trip loop (which the compiler would reject).

Constructor & Destructor Documentation

UnrollTransform()

sdfg::transformations::UnrollTransform::UnrollTransform ( structured_control_flow::StructuredLoop & loop )

explicit

Member Function Documentation

apply()

virtual void sdfg::transformations::UnrollTransform::apply ( builder::StructuredSDFGBuilder & builder, analysis::AnalysisManager & analysis_manager )

overridevirtual

Apply this transformation to the SDFG.

Parameters

builder	The SDFG builder
analysis_manager	The analysis manager (may be invalidated)

Implements sdfg::transformations::Transformation.

can_be_applied()

virtual bool sdfg::transformations::UnrollTransform::can_be_applied ( builder::StructuredSDFGBuilder & builder, analysis::AnalysisManager & analysis_manager )

overridevirtual

Check if this transformation can be safely applied.

Parameters

builder	The SDFG builder
analysis_manager	The analysis manager providing necessary analyses

Returns

true if all preconditions are met

Implements sdfg::transformations::Transformation.

from_json()

UnrollTransform sdfg::transformations::UnrollTransform::from_json ( builder::StructuredSDFGBuilder & builder, const nlohmann::json & j )

static

name()

virtual std::string sdfg::transformations::UnrollTransform::name ( ) const

overridevirtual

Get the name of this transformation.

Returns

The transformation name (e.g., "LoopInterchange")

Implements sdfg::transformations::Transformation.

to_json()

virtual void sdfg::transformations::UnrollTransform::to_json ( nlohmann::json & j ) const

overridevirtual

Serialize this transformation to JSON.

Parameters

j	JSON object to populate with transformation description

Exceptions

std::logic_error

if not implemented

Implements sdfg::transformations::Transformation.

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

• opt/include/sdfg/transformations/unroll_transform.h