[PATCH] D89590: [NPM][SimplifyCFGPass] For OptForFuzzing attribute, disable SimplifyCondBranch and FoldTwoEntryPHINode in NPM

[Zequan Wu via Phabricator via llvm-commits]

zequanwu created this revision.
zequanwu added reviewers: aeubanks, arsenm, asbirlea, ychen.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.
zequanwu requested review of this revision.
Herald added a subscriber: wdng.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D89590

Files:
  llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp


Index: llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp
===================================================================
--- llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp
+++ llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp
@@ -245,6 +245,10 @@
                                        FunctionAnalysisManager &AM) {
   auto &TTI = AM.getResult<TargetIRAnalysis>(F);
   Options.AC = &AM.getResult<AssumptionAnalysis>(F);
+  if (F.hasFnAttribute(Attribute::OptForFuzzing))
+    Options.setSimplifyCondBranch(false).setFoldTwoEntryPHINode(false);
+  else
+    Options.setSimplifyCondBranch(true).setFoldTwoEntryPHINode(true);
   if (!simplifyFunctionCFG(F, TTI, Options))
     return PreservedAnalyses::all();
   PreservedAnalyses PA;


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