Mon 19 Jun 2023 15:00 - 15:20 at Cypress 2 - PLDI: Compilation Chair(s): Chung-Kil Hur

Compilers are part of the foundation upon which software systems are built; they need to be as correct as possible. This paper is about stress-testing loop optimizers; it presents a major reimplementation of Yet Another Random Program Generator (YARPGen), an open-source generative compiler fuzzer. This new version has found 122 bugs, both in compilers for data-parallel languages, such as the Intel® Implicit SPMD Program Compiler and the Intel® oneAPI DPC++ compiler, and in C++ compilers such as GCC and Clang/LLVM. The first main contribution of our work is a novel method for statically avoiding undefined behavior when generating loops; the resulting programs conform to the relevant language standard, enabling automated testing. The second main contribution is a collection of mechanisms for increasing the diversity of generated loop code; in our evaluation, we demonstrate that these make it possible to trigger loop optimizations significantly more often, providing opportunities to discover bugs in the optimizers.

Mon 19 Jun

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13:40 - 15:20
PLDI: CompilationPLDI Research Papers at Cypress 2
Chair(s): Chung-Kil Hur Seoul National University

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13:40
20m
Talk
Don’t Look UB: Exposing Sanitizer-Eliding Compiler Optimizations
PLDI Research Papers
Raphael Isemann Vrije Universiteit Amsterdam, Cristiano Giuffrida Vrije Universiteit Amsterdam, Herbert Bos Vrije Universiteit Amsterdam, Erik van der Kouwe Vrije Universiteit Amsterdam, Klaus von Gleissenthall Vrije Universiteit Amsterdam
DOI
14:00
20m
Talk
Better Together: Unifying Datalog and Equality Saturation
PLDI Research Papers
Yihong Zhang University of Washington, Yisu Remy Wang University of Washington, Oliver Flatt University of Washington, David Cao University of California at San Diego, Philip Zucker Draper, Eli Rosenthal Google, Zachary Tatlock University of Washington, Max Willsey University of Washington
DOI Pre-print
14:20
20m
Talk
HEaaN.MLIR: An Optimizing Compiler for Fast Ring-Based Homomorphic Encryption
PLDI Research Papers
Sunjae Park Seoul National University, Woosung Song Google, Seunghyeon Nam Seoul National University, Hyeongyu Kim Seoul National University, Junbum Shin CryptoLab, Juneyoung Lee AWS
DOI
14:40
20m
Talk
Indexed Streams: A Formal Intermediate Representation for Fused Contraction Programs
PLDI Research Papers
Scott Kovach Stanford University, Praneeth Kolichala Stanford University, Tiancheng “Timothy” Gu Stanford University, Fredrik Kjolstad Stanford University
DOI Pre-print
15:00
20m
Talk
Fuzzing Loop Optimizations in Compilers for C++ and Data-Parallel Languages
PLDI Research Papers
Vsevolod Livinskii University of Utah, Dmitry Babokin Intel Corporation, John Regehr University of Utah
DOI Pre-print