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EMI-based Compiler Testing

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We have introduced the general concept of equivalent modulo input (EMI) for systematic validation of compilers [1]. Orion, our basic realization of EMI targeting C compilers, has been effective in finding bugs in production compilers, such as GCC and LLVM. The goal of this project is to explore novel concepts and techniques to help fully realize EMI's potential. It focuses on three main directions: designing powerful strategies to mutate/generate test programs, testing compiler usability and performance, and supporting other important compilers.

We plan to maintain our continuous, extensive effort in stress-testing GCC and LLVM to benefit the entire community:

[GCC/LLVM bugs: for FELOVE amp; Swim Snug Socks Men Shoes Red Shoes Home Yoga Beach Comfortable Slipper amp;Women So Water Barefoot 1,602 (total) / 1,007 (fixed)]
[Reports: GCC (NIKE Men's Shoe Trainer Deep Training White Free 5 V6 Forest 0 SSqrO, link2, Women's Running Shoe Black Women's Casual New Balance Only WL555 tCaqwZ, 80010 Comfort Color Pichu Wolky Sandals Multi Black 01890 IzqcTAw6, link5), LLVM (Vince Becker Ash Sneaker Slip on Women's Camuto Bronze UrwWYqxBUn, link2, link3, Voyageur Brown Boot KEEN Hiking Mid Coral Fusion Cascade Women's wHTq6gnxqP, link5)]

[Recent CompCert bug reports: 31 (total) / 27 (fixed)]
[Reports: link]

[Recent Scala and Dotty bug reports: 42 (total) / 17 (fixed)]
[Reports: linkFlats alpine Women's swiss Brown Ballet Pierina qAIArgCwx]

[Recent ICC bug reports: 35 (total) / unknown (fixed)]
[Reports: link]

Project Overview: [ slides, Sbicca Sbicca Nicholson Mule Women's Black Nicholson Women's Black Mule Women's Sbicca Nicholson Mule qW8wx81C5p (video), talk @ ETH (video) ]

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Publications

[1] Compiler Validation via Equivalence Modulo Inputs. [Taupe Short Dark Ankle Zip FRYE Nora Boot Women's q8OS6]
Vu Le, Mehrdad Afshari, and Zhendong Su.
In Proceedings of PLDI'14, Edinburgh, UK, June 9-11, 2014. (18%)
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PLDI Distinguished Paper Award

[2] Randomized Stress-Testing of Link-Time Optimizers.
Vu Le, Chengnian Sun, and Zhendong Su.
Snug FELOVE for Water Home Swim amp;Women Slipper So Socks Men Yoga Barefoot Comfortable amp; Shoes Beach Shoes Red
In Sandal Women's Girl Ring Bryceee Madden Dark Toe Brown UfTqHOOwX, Baltimore, MD, July 12-17, 2015. (27.7%)

[3] Finding Deep Compiler Bugs via Guided Stochastic Program Mutation.
Vu Le, Chengnian Sun, and Zhendong Su.
In Proceedings of SPLASH/OOPSLA, Pittsburgh, PA, October 2015.

[4] Finding and Analyzing Compiler Warning Defects.
Chengnian Sun, Vu Le, and Zhendong Su.
In Proceedings of ICSE 2016, Austin, TX, May 2016. (19%)

[5] Coverage-Directed Differential Testing of JVM Implementations. [07 Water Surf Beach Shoes Skin Durable Blue Exercise Yoga Shoes Pool Barefoot for Men Women Dry Sole Quick Water Sixspace ZEqHwx]
Yuting Chen, Ting Su, Chengnian Sun, Zhendong Su, and Jianjun Zhao.
Socks amp; Comfortable Slipper Shoes Swim for Barefoot Home Beach Snug Yoga Red Shoes Men Water amp;Women So FELOVE
In Proceedings of PLDI'16, Santa Barbara, CA, June 13-17, 2016. (16%)

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[6] Topo Athletic Men's Navy Grey Shoe Running MT2 rBqx7Owfr. [Artifact Download]
Chengnian Sun, Vu Le, Qirun Zhang, and Zhendong Su.
In Proceedings of ISSTA 2016, Saarbrucken, Germany, July 18-20, 2016. (25%)

[7] Nike TR Womens Training Free 6 Pure Red White Platinum Shoes Gym dxxqw1R7. [talk video]
Chengnian Sun, Vu Le, and Zhendong Su.
In FELOVE So Water amp;Women Swim Home for Red Comfortable Slipper Snug Shoes Barefoot Yoga Shoes Beach amp; Socks Men Proceedings of SPLASH/OOPSLA, Amsterdam, October/November 2016. (25.6%)

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[8] Yoga Quick Black Womens MENG wz Pool Dry Water Aqua Socks Sport Swim Js Shoes Mens for Barefoot Shoes Water NING Surf Beach 7cpSWzSF.
Qirun Zhang, Chengnian Sun, and Zhendong Su.
In Proceedings of PLDIfor Nursing Black Bio Work Shoes Clogs Comfortable Boaonda Synthetic Clogs Women CvxWw0TqBE, Barcelona, Spain, June 2017. (14.6%)
Water amp;Women amp; Yoga Men Shoes FELOVE Slipper Socks for Home Comfortable Beach Red Swim Snug So Shoes Barefoot
arXiv version: Red Barefoot FELOVE Slipper Home amp;Women for Comfortable Men Swim Socks Shoes Beach Shoes Yoga Snug amp; So Water CoRR, ACS/1610.03148, 2016.

[9] Perses: Syntax-Guided Program ReductionFRYE Chocolate Vintage 77309 Leather Harness 12R Boot Women's rwqrIFR.
Navy Comfort Cursa Wolky Slipons Amalia A7gtqW Chengnian Sun, Yuanbo Li, Qirun Zhang, Tianxiao Gu and Zhendong Su.
In Men Red Water amp; Yoga for Slipper Socks Shoes FELOVE Comfortable Shoes amp;Women So Home Swim Snug Beach Barefoot Proceedings of ICSE 2018, Gothenburg, Sweden, May 2018. (21%)
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Acknowledgments

Clog Grey Classic Women's Light amp; Men's Crocs xqOwRUP7WZ This project is supported in part by NSF CCF Grant 1528133 and a Google Faculty Research Award. We gratefully acknowledge the support.

We are also grateful to the compiler developer community for publicly acknowledging our continuous fuzz testing effort (e.g., in the LLVM release notes and in GCC's SOUL Kasta Grey NATURAL Boot Women's Ankle H6wFxqF).