mlir::OpTrait::Elementwise< ConcreteType > Struct Template Reference

This trait tags element-wise ops on vectors or tensors. More...

#include "mlir/IR/OpDefinition.h"

Inheritance diagram for mlir::OpTrait::Elementwise< ConcreteType >:

Static Public Member Functions
static LogicalResult	verifyTrait (Operation *op)

Additional Inherited Members
Protected Member Functions inherited from mlir::OpTrait::TraitBase< ConcreteType, Elementwise >
Operation *	getOperation ()
	Return the ultimate Operation being worked on. More...

Detailed Description

template<typename ConcreteType>
struct mlir::OpTrait::Elementwise< ConcreteType >

This trait tags element-wise ops on vectors or tensors.

NOTE: Not all ops that are "elementwise" in some abstract sense satisfy this trait. In particular, broadcasting behavior is not allowed.

An Elementwise op must satisfy the following properties:

1. If any result is a vector/tensor then at least one operand must also be a vector/tensor.
2. If any operand is a vector/tensor then there must be at least one result and all results must be vectors/tensors.
3. All operand and result vector/tensor types must be of the same shape. The shape may be dynamic in which case the op's behaviour is undefined for non-matching shapes.
4. The operation must be elementwise on its vector/tensor operands and results. When applied to single-element vectors/tensors, the result must be the same per elememnt.

TODO: Avoid hardcoding vector/tensor, and generalize this trait to a new interface ElementwiseTypeInterface that describes the container types for which the operation is elementwise.

Rationale:

• 1. and 2. guarantee a well-defined iteration space and exclude the cases of 0 non-scalar operands or 0 non-scalar results, which complicate a generic definition of the iteration space.
• 3. guarantees that folding can be done across scalars/vectors/tensors with the same pattern, as otherwise lots of special handling for type mismatches would be needed.
• 4. guarantees that no error handling is needed. Higher-level dialects should reify any needed guards or error handling code before lowering to an Elementwise op.

Definition at line 1400 of file OpDefinition.h.

Member Function Documentation

verifyTrait()

template<typename ConcreteType >

static LogicalResult mlir::OpTrait::Elementwise< ConcreteType >::verifyTrait ( Operation *  op )

inlinestatic

Definition at line 1401 of file OpDefinition.h.

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

• include/mlir/IR/OpDefinition.h