Classes
struct	IdBuilderResult
	Helper type for functions that generate ids for the mapping of a scf.forall. More...

struct	GpuIdBuilder
	Helper struct for configuring the rewrite of mapped scf.forall ops to various gpu id configurations. More...

struct	GpuBlockIdBuilder
	Builder for gpu::BlockIdOps used to map scf.forall to blocks. More...

struct	GpuWarpgroupIdBuilder
	Builder for warpgroup ids used to map scf.forall to reindexed warpgroups. More...

struct	GpuWarpIdBuilder
	Builder for warp ids used to map scf.forall to reindexed warps. More...

struct	GpuThreadIdBuilder
	Builder for warp ids used to map scf.forall to reindexed threads. More...

struct	MappingInfo
	Base struct to hold GPU mapping information for a given operation. More...

struct	CopyMappingInfo

Typedefs
using	GpuIdBuilderFnType = std::function< IdBuilderResult(RewriterBase &, Location, ArrayRef< int64_t >, ArrayRef< int64_t >)>
	Common gpu id builder type, allows the configuration of lowering for various mapping schemes. More...

Functions
DiagnosedSilenceableFailure	mapForallToBlocksImpl (RewriterBase &rewriter, TransformOpInterface transformOp, scf::ForallOp forallOp, SmallVectorImpl< int64_t > &gridDims, const GpuIdBuilder &gpuIdBuilder)
	Map the top level `scf.forall` op to GPU blocks. More...

DiagnosedSilenceableFailure	mapOneForallToThreadsImpl (RewriterBase &rewriter, std::optional< TransformOpInterface > transformOp, scf::ForallOp forallOp, ArrayRef< int64_t > blockDims, int64_t warpSize, bool syncAfterDistribute)
	Search `scf.forall` ops nested under `target` and map each such op to an explicit GPU implementation along `blockDims`. More...

DiagnosedSilenceableFailure	mapNestedForallToThreadsImpl (RewriterBase &rewriter, std::optional< TransformOpInterface > transformOp, Operation *target, ArrayRef< int64_t > blockDims, int64_t warpSize, bool syncAfterDistribute)
	Search `scf.forall` ops nested under `target` and map each such op to an explicit GPU implementation along `blockDims`. More...

DiagnosedSilenceableFailure	checkGpuLimits (TransformOpInterface transformOp, std::optional< int64_t > gridDimX, std::optional< int64_t > gridDimY, std::optional< int64_t > gridDimZ, std::optional< int64_t > blockDimX, std::optional< int64_t > blockDimY, std::optional< int64_t > blockDimZ)
	Determine if the size of the kernel configuration is supported by the GPU architecture being used. More...

DiagnosedSilenceableFailure	createGpuLaunch (RewriterBase &rewriter, Location loc, TransformOpInterface transformOp, mlir::gpu::LaunchOp &launchOp, std::optional< int64_t > gridDimX=std::nullopt, std::optional< int64_t > gridDimY=std::nullopt, std::optional< int64_t > gridDimZ=std::nullopt, std::optional< int64_t > blockDimX=std::nullopt, std::optional< int64_t > blockDimY=std::nullopt, std::optional< int64_t > blockDimZ=std::nullopt)
	Create an empty-body gpu::LaunchOp using the provided kernel settings and put a terminator within. More...

DiagnosedSilenceableFailure	alterGpuLaunch (RewriterBase &rewriter, mlir::gpu::LaunchOp gpuLaunch, TransformOpInterface transformOp, std::optional< int64_t > gridDimX=std::nullopt, std::optional< int64_t > gridDimY=std::nullopt, std::optional< int64_t > gridDimZ=std::nullopt, std::optional< int64_t > blockDimX=std::nullopt, std::optional< int64_t > blockDimY=std::nullopt, std::optional< int64_t > blockDimZ=std::nullopt)
	Alter kernel configuration of the given kernel. More...

DiagnosedSilenceableFailure	findTopLevelForallOp (Operation *target, scf::ForallOp &topLevelForallOp, TransformOpInterface transformOp)
	Find the unique top level scf::ForallOp within a given target op. More...

DiagnosedSilenceableFailure	createGpuLaunch (RewriterBase &rewriter, Location loc, TransformOpInterface transformOp, LaunchOp &launchOp, std::optional< int64_t > gridDimX, std::optional< int64_t > gridDimY, std::optional< int64_t > gridDimZ, std::optional< int64_t > blockDimX, std::optional< int64_t > blockDimY, std::optional< int64_t > blockDimZ)

DiagnosedSilenceableFailure	alterGpuLaunch (RewriterBase &rewriter, LaunchOp gpuLaunch, TransformOpInterface transformOp, std::optional< int64_t > gridDimX, std::optional< int64_t > gridDimY, std::optional< int64_t > gridDimZ, std::optional< int64_t > blockDimX, std::optional< int64_t > blockDimY, std::optional< int64_t > blockDimZ)
	Alter kernel configuration of the given kernel. More...

Typedef Documentation

◆ GpuIdBuilderFnType

using mlir::transform::gpu::GpuIdBuilderFnType = typedef std::function<IdBuilderResult( RewriterBase &, Location, ArrayRef<int64_t>, ArrayRef<int64_t>)>

Common gpu id builder type, allows the configuration of lowering for various mapping schemes.

Takes:

A rewriter with insertion point set before the forall op to rewrite.
The loc of the forall op to rewrite.
A list of positive integers carrying the mapping sizes for the current forall op to rewrite.

Definition at line 58 of file Utils.h.

Function Documentation

◆ alterGpuLaunch() [1/2]

DiagnosedSilenceableFailure mlir::transform::gpu::alterGpuLaunch	(	RewriterBase &	rewriter,
		LaunchOp	gpuLaunch,
		TransformOpInterface	transformOp,
		std::optional< int64_t >	gridDimX,
		std::optional< int64_t >	gridDimY,
		std::optional< int64_t >	gridDimZ,
		std::optional< int64_t >	blockDimX,
		std::optional< int64_t >	blockDimY,
		std::optional< int64_t >	blockDimZ
	)

Alter kernel configuration of the given kernel.

Definition at line 300 of file Utils.cpp.

References checkGpuLimits(), mlir::OpBuilder::create(), diag(), mlir::Value::getLoc(), mlir::OpBuilder::setInsertionPointAfterValue(), mlir::DiagnosedSilenceableFailure::success(), and mlir::gpu::KernelDim3::x.

◆ alterGpuLaunch() [2/2]

DiagnosedSilenceableFailure mlir::transform::gpu::alterGpuLaunch	(	RewriterBase &	rewriter,
		mlir::gpu::LaunchOp	gpuLaunch,
		TransformOpInterface	transformOp,
		std::optional< int64_t >	gridDimX = `std::nullopt`,
		std::optional< int64_t >	gridDimY = `std::nullopt`,
		std::optional< int64_t >	gridDimZ = `std::nullopt`,
		std::optional< int64_t >	blockDimX = `std::nullopt`,
		std::optional< int64_t >	blockDimY = `std::nullopt`,
		std::optional< int64_t >	blockDimZ = `std::nullopt`
	)

Alter kernel configuration of the given kernel.

◆ checkGpuLimits()

DiagnosedSilenceableFailure mlir::transform::gpu::checkGpuLimits	(	TransformOpInterface	transformOp,
		std::optional< int64_t >	gridDimX,
		std::optional< int64_t >	gridDimY,
		std::optional< int64_t >	gridDimZ,
		std::optional< int64_t >	blockDimX,
		std::optional< int64_t >	blockDimY,
		std::optional< int64_t >	blockDimZ
	)

Determine if the size of the kernel configuration is supported by the GPU architecture being used.

TODO this is currently hardwired to CUDA, parameterize and generalize.

Definition at line 231 of file Utils.cpp.

References mlir::DiagnosedSilenceableFailure::success().

Referenced by alterGpuLaunch(), and createGpuLaunch().

◆ createGpuLaunch() [1/2]

DiagnosedSilenceableFailure mlir::transform::gpu::createGpuLaunch	(	RewriterBase &	rewriter,
		Location	loc,
		TransformOpInterface	transformOp,
		LaunchOp &	launchOp,
		std::optional< int64_t >	gridDimX,
		std::optional< int64_t >	gridDimY,
		std::optional< int64_t >	gridDimZ,
		std::optional< int64_t >	blockDimX,
		std::optional< int64_t >	blockDimY,
		std::optional< int64_t >	blockDimZ
	)

Definition at line 269 of file Utils.cpp.

References checkGpuLimits(), mlir::OpBuilder::create(), createConst(), diag(), mlir::OpBuilder::setInsertionPointToEnd(), and mlir::DiagnosedSilenceableFailure::success().

◆ createGpuLaunch() [2/2]

DiagnosedSilenceableFailure mlir::transform::gpu::createGpuLaunch	(	RewriterBase &	rewriter,
		Location	loc,
		TransformOpInterface	transformOp,
		mlir::gpu::LaunchOp &	launchOp,
		std::optional< int64_t >	gridDimX = `std::nullopt`,
		std::optional< int64_t >	gridDimY = `std::nullopt`,
		std::optional< int64_t >	gridDimZ = `std::nullopt`,
		std::optional< int64_t >	blockDimX = `std::nullopt`,
		std::optional< int64_t >	blockDimY = `std::nullopt`,
		std::optional< int64_t >	blockDimZ = `std::nullopt`
	)

Create an empty-body gpu::LaunchOp using the provided kernel settings and put a terminator within.

◆ findTopLevelForallOp()

DiagnosedSilenceableFailure mlir::transform::gpu::findTopLevelForallOp	(	Operation *	target,
		scf::ForallOp &	topLevelForallOp,
		TransformOpInterface	transformOp
	)

Find the unique top level scf::ForallOp within a given target op.

Definition at line 636 of file GPUTransformOps.cpp.

References mlir::WalkResult::advance(), mlir::WalkResult::interrupt(), mlir::DiagnosedSilenceableFailure::success(), and mlir::Operation::walk().

◆ mapForallToBlocksImpl()

DiagnosedSilenceableFailure mlir::transform::gpu::mapForallToBlocksImpl	(	RewriterBase &	rewriter,
		TransformOpInterface	transformOp,
		scf::ForallOp	forallOp,
		SmallVectorImpl< int64_t > &	gridDims,
		const GpuIdBuilder &	gpuIdBuilder
	)

Map the top level scf.forall op to GPU blocks.

Mapping is one-to-one and the induction variables of scf.forall are rewritten to gpu.block_id according to the thread_dim_mapping attribute.

Dynamic, scf.forall trip counts are currently not supported. Dynamic gridDims are currently not supported.

Definition at line 582 of file GPUTransformOps.cpp.

References mlir::OpBuilder::create(), diag(), LDBG, ForallRewriteResult::mappingSizes, rewriteOneForallCommonImpl(), mlir::OpBuilder::setInsertionPointToStart(), and mlir::DiagnosedSilenceableFailure::success().

◆ mapNestedForallToThreadsImpl()

DiagnosedSilenceableFailure mlir::transform::gpu::mapNestedForallToThreadsImpl	(	RewriterBase &	rewriter,
		std::optional< TransformOpInterface >	transformOp,
		Operation *	target,
		ArrayRef< int64_t >	blockDims,
		int64_t	warpSize,
		bool	syncAfterDistribute
	)

Search scf.forall ops nested under target and map each such op to an explicit GPU implementation along blockDims.

The mapping is one-to-one and the induction variables of scf.forall are rewritten to appropriate ids according to the mapping attribute.

Dynamic, scf.forall trip counts are currently not supported. Dynamic blockDims or newBasis entries are currently not supported. blockDims is expected to be of size 3.

The insertion point of the rewriter is expected to be set at the beginning of the target body block and dominate all other blocks.

Definition at line 846 of file GPUTransformOps.cpp.

References mlir::WalkResult::advance(), mlir::OpBuilder::create(), definiteFailureHelper(), diag(), mlir::Operation::getLoc(), mlir::WalkResult::interrupt(), LDBG, mapOneForallToThreadsImpl(), mlir::WalkResult::skip(), mlir::DiagnosedSilenceableFailure::success(), mlir::Operation::walk(), and mlir::WalkResult::wasInterrupted().

◆ mapOneForallToThreadsImpl()

DiagnosedSilenceableFailure mlir::transform::gpu::mapOneForallToThreadsImpl	(	RewriterBase &	rewriter,
		std::optional< TransformOpInterface >	transformOp,
		scf::ForallOp	forallOp,
		ArrayRef< int64_t >	blockDims,
		int64_t	warpSize,
		bool	syncAfterDistribute
	)

Search scf.forall ops nested under target and map each such op to an explicit GPU implementation along blockDims.

The mapping is one-to-one and the induction variables of scf.forall are rewritten to gpuIdBuilder.idBuilder according to the gpuIdBuilder.mappingAttributes attribute.

Dynamic, scf.forall trip counts are currently not supported. Dynamic blockDims sizes are currently not supported. blockDims is expected to be of size 3.

Definition at line 806 of file GPUTransformOps.cpp.

References mlir::OpBuilder::create(), diag(), getThreadIdBuilder(), rewriteOneForallCommonImpl(), mlir::OpBuilder::setInsertionPointAfter(), and mlir::DiagnosedSilenceableFailure::success().

Referenced by mapNestedForallToThreadsImpl().

Classes

Typedefs

Functions