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Matt Morehouse 3102888fd3 [SimplifyCFG] Create attribute for fuzzing-specific optimizations. 
Summary:
When building with libFuzzer, converting control flow to selects or
obscuring the original operands of CMPs reduces the effectiveness of
libFuzzer's heuristics.

This patch provides an attribute to disable or modify certain optimizations
for optimal fuzzing signal.

Provides a less aggressive alternative to https://reviews.llvm.org/D44057.

Reviewers: vitalybuka, davide, arsenm, hfinkel

Reviewed By: vitalybuka

Subscribers: junbuml, mehdi_amini, wdng, javed.absar, hiraditya, llvm-commits, kcc

Differential Revision: https://reviews.llvm.org/D44232

llvm-svn: 328214
2018-03-22 17:07:51 +00:00
..
Reader [SimplifyCFG] Create attribute for fuzzing-specific optimizations. 2018-03-22 17:07:51 +00:00
Writer [SimplifyCFG] Create attribute for fuzzing-specific optimizations. 2018-03-22 17:07:51 +00:00
CMakeLists.txt
LLVMBuild.txt