Struct ScheduleItem 

pub struct ScheduleItem {
    pub kernel: Arc<UOp>,
    pub ast: Arc<UOp>,
    pub buffers: Vec<Buffer>,
    pub buffer_uop_ids: Vec<u64>,
    pub fixedvars: HashMap<String, i64>,
    pub loop_var_names: HashSet<String>,
    pub dependencies: Vec<u64>,
    pub instance_dependencies: Vec<usize>,
    pub alias_registered_ids: Vec<u64>,
}

A single executable callable with its buffers and variable bindings.

Each ScheduleItem represents one callable that needs to be compiled and executed. The callable AST contains STORE operations that write results to buffers.

Schedule items are fully expanded during schedule instantiation.

Fields

kernel: Arc<UOp>

The callable wrapper UOp (CALL) used for dependency identity.

ast: Arc<UOp>

The inner callable AST (typically SINK containing STORE ops) - for codegen

buffers: Vec<Buffer>

Device buffers for this callable (in order expected by codegen)

buffer_uop_ids: Vec<u64>

UOp IDs under which each buffer was registered in buffer index. Same length as buffers. Used for cleanup - to remove buffers from the global registry, we need to know what key they were registered under.

fixedvars: HashMap<String, i64>

Fixed variable values for this specific kernel invocation. Maps variable name (e.g., “range_0”) to concrete i64 value. Always concrete in the strict scheduler path.

loop_var_names: HashSet<String>

Names of variables in fixedvars whose values came from schedule-loop counters. User var_vals must not override these — see collect_non_overridable_fixedvars.

dependencies: Vec<u64>

Callable UOp IDs that must complete before this item can execute. Empty for callables without dependencies (first in chain or independent). Dependencies are implicit in scheduling order after topological sort.

instance_dependencies: Vec<usize>

Concrete schedule-item indices that must complete before this item. Used for ordering constraints that cannot be represented by callable ID after strict unrolling creates repeated callable IDs.

alias_registered_ids: Vec<u64>

Additional UOp IDs registered as aliases in buffer index. These are IDs where the same buffer was registered under a different key for lookup convenience. They need to be cleaned up along with buffer_uop_ids.

Trait Implementations

impl Clone for ScheduleItem

fn clone(&self) -> ScheduleItem

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.