mlir::GreedyRewriteConfig Class Reference

This class allows control over how the GreedyPatternRewriteDriver works. More...

#include "mlir/Transforms/GreedyPatternRewriteDriver.h"

Public Attributes
bool	useTopDownTraversal = false
	This specifies the order of initial traversal that populates the rewriters worklist. More...
bool	enableRegionSimplification = true
	Perform control flow optimizations to the region tree after applying all patterns. More...
int64_t	maxIterations = 10
	This specifies the maximum number of times the rewriter will iterate between applying patterns and simplifying regions. More...
int64_t	maxNumRewrites = kNoLimit
	This specifies the maximum number of rewrites within an iteration. More...
Region *	scope = nullptr
	Only ops within the scope are added to the worklist. More...
GreedyRewriteStrictness	strictMode = GreedyRewriteStrictness::AnyOp
	Strict mode can restrict the ops that are added to the worklist during the rewrite. More...
RewriterBase::Listener *	listener = nullptr
	An optional listener that should be notified about IR modifications. More...

Static Public Attributes
static constexpr int64_t	kNoLimit = -1

Detailed Description

This class allows control over how the GreedyPatternRewriteDriver works.

Definition at line 33 of file GreedyPatternRewriteDriver.h.

Member Data Documentation

enableRegionSimplification

bool mlir::GreedyRewriteConfig::enableRegionSimplification = true

Perform control flow optimizations to the region tree after applying all patterns.

Note: Only applicable when simplifying entire regions.

Definition at line 48 of file GreedyPatternRewriteDriver.h.

kNoLimit

constexpr int64_t mlir::GreedyRewriteConfig::kNoLimit = -1

staticconstexpr

Definition at line 61 of file GreedyPatternRewriteDriver.h.

listener

RewriterBase::Listener* mlir::GreedyRewriteConfig::listener = nullptr

An optional listener that should be notified about IR modifications.

Definition at line 82 of file GreedyPatternRewriteDriver.h.

maxIterations

int64_t mlir::GreedyRewriteConfig::maxIterations = 10

This specifies the maximum number of times the rewriter will iterate between applying patterns and simplifying regions.

Use kNoLimit to disable this iteration limit.

Note: Only applicable when simplifying entire regions.

Definition at line 55 of file GreedyPatternRewriteDriver.h.

Referenced by mlir::applyPatternsAndFoldGreedily().

maxNumRewrites

int64_t mlir::GreedyRewriteConfig::maxNumRewrites = kNoLimit

This specifies the maximum number of rewrites within an iteration.

Use kNoLimit to disable this limit.

Definition at line 59 of file GreedyPatternRewriteDriver.h.

scope

Region* mlir::GreedyRewriteConfig::scope = nullptr

Only ops within the scope are added to the worklist.

If no scope is specified, the closest enclosing region around the initial list of ops (or the specified region, depending on which greedy rewrite entry point is used) is used as a scope.

Definition at line 67 of file GreedyPatternRewriteDriver.h.

Referenced by mlir::applyOpPatternsAndFold(), and mlir::applyPatternsAndFoldGreedily().

strictMode

GreedyRewriteStrictness mlir::GreedyRewriteConfig::strictMode = GreedyRewriteStrictness::AnyOp

Strict mode can restrict the ops that are added to the worklist during the rewrite.

• GreedyRewriteStrictness::AnyOp: No ops are excluded.
• GreedyRewriteStrictness::ExistingAndNewOps: Only pre-existing ops (that were on the worklist at the very beginning) and newly created ops are enqueued. All other ops are excluded.
• GreedyRewriteStrictness::ExistingOps: Only pre-existing ops (that were were on the worklist at the very beginning) enqueued. All other ops are excluded.

Definition at line 79 of file GreedyPatternRewriteDriver.h.

Referenced by mlir::affine::hoistAffineIfOp().

useTopDownTraversal

bool mlir::GreedyRewriteConfig::useTopDownTraversal = false

This specifies the order of initial traversal that populates the rewriters worklist.

When set to true, it walks the operations top-down, which is generally more efficient in compile time. When set to false, its initial traversal of the region tree is bottom up on each block, which may match larger patterns when given an ambiguous pattern set.

Note: Only applicable when simplifying entire regions.

Definition at line 42 of file GreedyPatternRewriteDriver.h.

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

• include/mlir/Transforms/GreedyPatternRewriteDriver.h