'dlti' Dialect

The Data Layout and Target Information (DLTI) dialect is intended to hold attributes and other components pertaining to descriptions of in-memory data layout and compilation targets.

Attributes ¶

DataLayoutEntryAttr ¶

An attribute to represent an entry of a data layout specification.

A data layout entry attribute is a key-value pair where the key is a type or an identifier and the value is another attribute. These entries form a data layout specification.

Parameters: ¶

DataLayoutSpecAttr ¶

An attribute to represent a data layout specification.

A data layout specification is a list of entries that specify (partial) data layout information. It is expected to be attached to operations that serve as scopes for data layout requests.

Parameters: ¶

TargetDeviceSpecAttr ¶

An attribute to represent target device specification.

Syntax:

#dlti.target_device_spec<
  ::llvm::ArrayRef<DataLayoutEntryInterface>   # entries
>

Each device specification describes a single device and its hardware properties. Each device specification can contain any number of optional hardware properties (e.g., max_vector_op_width below).

Example:

#dlti.target_device_spec<
  #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>

Parameters: ¶

TargetSystemSpecAttr ¶

An attribute to represent target system specification.

Syntax:

#dlti.target_system_spec<
  ::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>   # entries
>

A system specification describes the overall system containing multiple devices, with each device having a unique ID (string) and its corresponding TargetDeviceSpec object.

Example:

dlti.target_system_spec =
 #dlti.target_system_spec<
  "CPU": #dlti.target_device_spec<
          #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
  "GPU": #dlti.target_device_spec<
          #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>,
  "XPU": #dlti.target_device_spec<
          #dlti.dl_entry<"dlti.max_vector_op_width", 4096 : ui32>>>

Parameters: ¶