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...
GreedySimplifyRegionLevel	enableRegionSimplification
	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...
bool	fold = true
	Whether this should fold while greedily rewriting. More...
bool	cseConstants = true
	If set to "true", constants are CSE'd (even across multiple regions that are in a parent-ancestor relationship). More...

Static Public Attributes
static constexpr int64_t	kNoLimit = -1

Detailed Description

This class allows control over how the GreedyPatternRewriteDriver works.

Definition at line 43 of file GreedyPatternRewriteDriver.h.

Member Data Documentation

cseConstants

bool mlir::GreedyRewriteConfig::cseConstants = true

If set to "true", constants are CSE'd (even across multiple regions that are in a parent-ancestor relationship).

Definition at line 100 of file GreedyPatternRewriteDriver.h.

enableRegionSimplification

GreedySimplifyRegionLevel mlir::GreedyRewriteConfig::enableRegionSimplification

Initial value:

=
      GreedySimplifyRegionLevel::Aggressive

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

Note: Only applicable when simplifying entire regions.

Definition at line 58 of file GreedyPatternRewriteDriver.h.

fold

bool mlir::GreedyRewriteConfig::fold = true

Whether this should fold while greedily rewriting.

Definition at line 96 of file GreedyPatternRewriteDriver.h.

kNoLimit

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

staticconstexpr

Definition at line 72 of file GreedyPatternRewriteDriver.h.

listener

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

An optional listener that should be notified about IR modifications.

Definition at line 93 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 66 of file GreedyPatternRewriteDriver.h.

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 70 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 78 of file GreedyPatternRewriteDriver.h.

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 90 of file GreedyPatternRewriteDriver.h.

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 52 of file GreedyPatternRewriteDriver.h.

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

• include/mlir/Transforms/GreedyPatternRewriteDriver.h