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Arm Work Sparked Super-Optimization
- At Arm Greta saw tight hardware/compiler interactions and felt constrained by separate passes.
- That motivated interest in super-optimization to search globally for optimal instruction sequences.
What Super-Optimization Actually Does
- Super-optimization searches for the provably optimal instruction sequence equivalent to a given snippet.
- Equivalence checking reduces to program equivalence verification, feasible for straight-line code but expensive overall.
Apply Super-Opt Selectively
- Use super-optimization selectively for critical code or to evaluate hardware/compiler trade-offs.
- Run expensive searches offline to inform backend design rather than in daily developer builds.