compilerscheduling
Compiler scheduling, or instruction scheduling, is the process by which a compiler determines the order in which instructions are issued for execution on a target processor. The aim is to minimize stalls, hide latencies, and balance resource use while preserving program semantics.
Scheduling can occur at different scopes. Local scheduling operates within a single basic block, while global
Scheduling must respect data dependencies (true dependencies, anti-dependencies, and output dependencies) and resource constraints on functional
Architectures influence scheduling choices. In superscalar or out-of-order CPUs, the hardware can exploit instruction-level parallelism but
Scheduling interacts with other back-end optimizations, particularly register allocation and instruction selection. Heavy scheduling can increase
The primary outcome is improved execution time and processor utilization, measured by lower cycles per instruction