ICFP 2021
Sun 22 - Sat 28 August 2021
Mon 23 Aug 2021 20:15 - 20:30 at ICFP Talks - Session 2
Tue 24 Aug 2021 08:15 - 08:30 at ICFP Talks - Session 2

An efficient optimizing compiler can perform many cascading rewrites in a single pass, using auxiliary data structures such as variable binding maps, delayed substitutions, and occurrence counts. Such optimizers often perform transformations according to relatively simple rewrite rules, but the subtle interactions between the data structures needed for efficiency make them tricky to write and trickier to prove correct. We present a system for semi-automatically deriving both an efficient program transformation and its correctness proof from a list of rewrite rules and specifications of the auxiliary data structures it requires. Dependent types ensure that the holes left behind by our system (for the user to fill in) are filled in correctly, allowing the user low-level control over the implementation without having to worry about getting it wrong. We implemented our system in Coq (though it could be implemented in other logics as well), and used it to write optimization passes that perform uncurrying, inlining, dead code elimination, and static evaluation of case expressions and record projections. The generated implementations are sometimes faster, and at most 40% slower, than hand-written counterparts on a small set of benchmarks; in some cases, they require significantly less code to write and prove correct.

Mon 23 Aug

Displayed time zone: Seoul change

19:00 - 20:45
19:00
15m
Talk
Contextual Modal Types for Algebraic Effects and Handlers
Research Papers
Nikita Zyuzin IMDEA Software Institute, Aleksandar Nanevski IMDEA Software Institute
DOI Media Attached
19:15
15m
Talk
Calculating Dependently-Typed Compilers (Functional Pearl)
Research Papers
Mitchell Pickard University of Nottingham, Graham Hutton University of Nottingham
DOI Media Attached
19:30
15m
Talk
Reasoning about Effect Interaction by Fusion
Research Papers
Zhixuan Yang Imperial College London, Nicolas Wu Imperial College London, UK
DOI Pre-print Media Attached
19:45
15m
Talk
Compositional Optimizations for CertiCoq
Research Papers
Zoe Paraskevopoulou Northeastern University, John M. Li Princeton University, Andrew Appel Princeton
DOI Media Attached
20:00
15m
Talk
Generalized Evidence Passing for Effect Handlers
Research Papers
Ningning Xie University of Hong Kong, Daan Leijen Microsoft Research
DOI Media Attached
20:15
15m
Talk
Deriving Efficient Program Transformations from Rewrite Rules
Research Papers
John M. Li Princeton University, Andrew W. Appel Princeton University
DOI Media Attached
20:30
15m
Talk
Algebras for Weighted Search
Research Papers
Oisín Kidney Imperial College London, Nicolas Wu Imperial College London, UK
DOI Media Attached

Tue 24 Aug

Displayed time zone: Seoul change

07:00 - 08:45
Session 2Research Papers at ICFP Talks
07:00
15m
Talk
Contextual Modal Types for Algebraic Effects and Handlers
Research Papers
Nikita Zyuzin IMDEA Software Institute, Aleksandar Nanevski IMDEA Software Institute
DOI Media Attached
07:15
15m
Talk
Calculating Dependently-Typed Compilers (Functional Pearl)
Research Papers
Mitchell Pickard University of Nottingham, Graham Hutton University of Nottingham
DOI Media Attached
07:30
15m
Talk
Reasoning about Effect Interaction by Fusion
Research Papers
Zhixuan Yang Imperial College London, Nicolas Wu Imperial College London, UK
DOI Pre-print Media Attached
07:45
15m
Talk
Compositional Optimizations for CertiCoq
Research Papers
Zoe Paraskevopoulou Northeastern University, John M. Li Princeton University, Andrew Appel Princeton
DOI Media Attached
08:00
15m
Talk
Generalized Evidence Passing for Effect Handlers
Research Papers
Ningning Xie University of Hong Kong, Daan Leijen Microsoft Research
DOI Media Attached
08:15
15m
Talk
Deriving Efficient Program Transformations from Rewrite Rules
Research Papers
John M. Li Princeton University, Andrew W. Appel Princeton University
DOI Media Attached
08:30
15m
Talk
Algebras for Weighted Search
Research Papers
Oisín Kidney Imperial College London, Nicolas Wu Imperial College London, UK
DOI Media Attached