[PATCH] D44057: [SimplifyCFG] Create attribute to disable simplifyCFG.

[Matt Morehouse via Phabricator via llvm-commits]

morehouse created this revision.
morehouse added reviewers: vitalybuka, davide, efriedma.
Herald added subscribers: hiraditya, javed.absar, mehdi_amini.

When building with libFuzzer, simplifyCFG reduces the coverage signal
available to libFuzzer when trying to find new inputs.  This patch
provides a way to disable simplifyCFG when building with libFuzzer.

Previous attempt https://reviews.llvm.org/D43423 received push-back
regarding the frontend flag.


https://reviews.llvm.org/D44057

Files:
  llvm/include/llvm/Bitcode/LLVMBitCodes.h
  llvm/include/llvm/IR/Attributes.td
  llvm/lib/AsmParser/LLLexer.cpp
  llvm/lib/AsmParser/LLParser.cpp
  llvm/lib/AsmParser/LLToken.h
  llvm/lib/Bitcode/Reader/BitcodeReader.cpp
  llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
  llvm/lib/IR/Attributes.cpp
  llvm/lib/IR/Verifier.cpp
  llvm/lib/Transforms/IPO/ForceFunctionAttrs.cpp
  llvm/lib/Transforms/Utils/CodeExtractor.cpp
  llvm/lib/Transforms/Utils/SimplifyCFG.cpp
  llvm/test/Transforms/SimplifyCFG/no-simplify-cfg.ll

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