Passes

2026-08-09

2 min read time

Applies to Linux

pass

struct pass

An interface for applying a transformation to the instructions in a program

Public Functions

std::string name() const

A unique name used to identify the pass.

void apply(module_pass_manager &mpm) const

Run the pass on the module.

void apply(module &m) const

void apply(program &p) const

Run the pass on the program.

dead_code_elimination

struct dead_code_elimination

Remove instructions where the output is not used.

Public Functions

inline std::string name() const

void apply(module &m) const

void apply(program &p) const

eliminate_common_subexpression

struct eliminate_common_subexpression

Remove identical instructions.

Public Functions

inline std::string name() const

void apply(module &m) const

eliminate_concat

struct eliminate_concat

Remove concat operators by having each operator write to different chunk of memory.

Public Functions

inline std::string name() const

void apply(module &m) const

Public Members

concat_optimization concat_opt

eliminate_contiguous

struct eliminate_contiguous

Remove contiguous instructions by checking if the operator can use non-standard shapes.

Public Functions

inline std::string name() const

void apply(module &m) const

Public Members

std::string op_name

eliminate_identity

struct eliminate_identity

Remove identity instructions. Currently when used as the last pass, it will preserve the semantics of previous program state, therefore dead code elimination should not be used afterwards.

Public Functions

inline std::string name() const

void apply(module &m) const

eliminate_pad

struct eliminate_pad

Remove pads if they can be written as an attribute to another op (im2col, convolution, pooling)

Public Functions

inline std::string name() const

void apply(module &m) const

propagate_constant

struct propagate_constant

Replace instructions which take all literals with a literal of the computation.

Public Functions

inline std::string name() const

void apply(module &m) const

Public Members

std::unordered_set<std::string> skip_ops = {}

rewrite_rnn

Warning

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schedule

struct schedule

Schedule instructions for concurrent execution

Public Functions

inline std::string name() const

void apply(module &m) const

Public Members

schedule_model model = {}

bool enable = true

simplify_algebra

struct simplify_algebra

Simplify many algebraic instructions to more efficient versions.

Public Functions

inline std::string name() const

void apply(module &m) const

simplify_reshapes

struct simplify_reshapes

Eliminate redundant reshapes.

Public Functions

inline std::string name() const

void apply(module &m) const

Public Members

size_t depth = 4

bool enable_op_shape_transform_op = false

bool enable_gather_rewrite = false