[analyzer] [NFC] Dead code removal

[NoQ]

clang/lib/StaticAnalyzer/Core/ExprEngine.cpp

3187–3191

Do trimmed graphs still work correctly after this change?

[george.karpenkov]

clang/lib/StaticAnalyzer/Core/ExprEngine.cpp

3187–3191

BugType::FlushReports is always a noop

[NoQ]

Mm okay right. I wonder what were the plans for NSErrorChecker that required this.

clang/include/clang/StaticAnalyzer/Core/BugReporter/BugType.h

StringRef getCheckName() const {
     return CheckName;
   }
 
   /// isSuppressOnSink - Returns true if bug reports associated with this bug
   ///  type should be suppressed if the end node of the report is post-dominated
   ///  by a sink node.
   bool isSuppressOnSink() const { return SuppressOnSink; }
   void setSuppressOnSink(bool x) { SuppressOnSink = x; }
-
-  virtual void FlushReports(BugReporter& BR);
 };
 
 class BuiltinBug : public BugType {
   const std::string desc;
   void anchor() override;
 public:
   BuiltinBug(class CheckName check, const char *name, const char *description)
       : BugType(check, name, categories::LogicError), desc(description) {}

clang/include/clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h

public:
   SValBuilder &getSValBuilder() {
     return Eng.getSValBuilder();
   }
 
   SymbolManager &getSymbolManager() {
     return getSValBuilder().getSymbolManager();
   }
 
-  bool isObjCGCEnabled() const {
-    return Eng.isObjCGCEnabled();
-  }
-
   ProgramStateManager &getStateManager() {
     return Eng.getStateManager();
   }
 
   AnalysisDeclContext *getCurrentAnalysisDeclContext() const {
     return Pred->getLocationContext()->getAnalysisDeclContext();
   }
 

clang/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h

private:
 
   unsigned int currStmtIdx = 0;
   const NodeBuilderContext *currBldrCtx = nullptr;
 
   /// Helper object to determine if an Objective-C message expression
   /// implicitly never returns.
   ObjCNoReturn ObjCNoRet;
 
-  /// Whether or not GC is enabled in this analysis.
-  bool ObjCGCEnabled;
-
   /// The BugReporter associated with this engine.  It is important that
   ///  this object be placed at the very end of member variables so that its
   ///  destructor is called before the rest of the ExprEngine is destroyed.
   GRBugReporter BR;
 
   /// The functions which have been analyzed through inlining. This is owned by
   /// AnalysisConsumer. It can be null.
   SetOfConstDecls *VisitedCallees;
getCrossTranslationUnitContext() override {
     return &CTU;
   }
 
   const NodeBuilderContext &getBuilderContext() {
     assert(currBldrCtx);
     return *currBldrCtx;
   }
 
-  bool isObjCGCEnabled() { return ObjCGCEnabled; }
-
   const Stmt *getStmt() const;
 
   void GenerateAutoTransition(ExplodedNode *N);
   void enqueueEndOfPath(ExplodedNodeSet &S);
   void GenerateCallExitNode(ExplodedNode *N);
 
   /// Visualize the ExplodedGraph created by executing the simulation.
   void ViewGraph(bool trim = false);

clang/lib/StaticAnalyzer/Core/BugReporter.cpp

 
 
 //===----------------------------------------------------------------------===//
 // Methods for BugType and subclasses.
 //===----------------------------------------------------------------------===//
 
 void BugType::anchor() {}
 
-void BugType::FlushReports(BugReporter &BR) {}
-
 void BuiltinBug::anchor() {}
 
 //===----------------------------------------------------------------------===//
 // Methods for BugReport and subclasses.
 //===----------------------------------------------------------------------===//
 
 void BugReport::NodeResolver::anchor() {}
 

   for (const auto I : EQClassesVector)
     delete I;
 }
 
 void BugReporter::FlushReports() {
   if (BugTypes.isEmpty())
     return;
 
-  // First flush the warnings for each BugType.  This may end up creating new
-  // warnings and new BugTypes.
-  // FIXME: Only NSErrorChecker needs BugType's FlushReports.
-  // Turn NSErrorChecker into a proper checker and remove this.
-  SmallVector<const BugType *, 16> bugTypes(BugTypes.begin(), BugTypes.end());
-  for (const auto I : bugTypes)
-    const_cast<BugType*>(I)->FlushReports(*this);
-
   // We need to flush reports in deterministic order to ensure the order
   // of the reports is consistent between runs.
   for (const auto EQ : EQClassesVector)
     FlushReport(*EQ);
 
   // BugReporter owns and deletes only BugTypes created implicitly through
   // EmitBasicReport.
   // FIXME: There are leaks from checkers that assume that the BugTypes they

clang/lib/StaticAnalyzer/Core/ExprEngine.cpp

     : CTU(CTU), AMgr(mgr),
       AnalysisDeclContexts(mgr.getAnalysisDeclContextManager()),
       Engine(*this, FS, mgr.getAnalyzerOptions()), G(Engine.getGraph()),
       StateMgr(getContext(), mgr.getStoreManagerCreator(),
                mgr.getConstraintManagerCreator(), G.getAllocator(),
                this),
       SymMgr(StateMgr.getSymbolManager()),
       svalBuilder(StateMgr.getSValBuilder()), ObjCNoRet(mgr.getASTContext()),
-      ObjCGCEnabled(gcEnabled), BR(mgr, *this),
+      BR(mgr, *this),
       VisitedCallees(VisitedCalleesIn), HowToInline(HowToInlineIn) {
   unsigned TrimInterval = mgr.options.getGraphTrimInterval();
   if (TrimInterval != 0) {
     // Enable eager node reclaimation when constructing the ExplodedGraph.
     G.enableNodeReclamation(TrimInterval);
   }
 }
 

 } // namespace llvm
 #endif
 
 void ExprEngine::ViewGraph(bool trim) {
 #ifndef NDEBUG
   if (trim) {
     std::vector<const ExplodedNode *> Src;
 
-    // Flush any outstanding reports to make sure we cover all the nodes.
-    // This does not cause them to get displayed.
-    for (const auto I : BR)
-      const_cast<BugType *>(I)->FlushReports(BR);
-
     // Iterate through the reports and get their nodes.
     for (BugReporter::EQClasses_iterator
            EI = BR.EQClasses_begin(), EE = BR.EQClasses_end(); EI != EE; ++EI) {
       const auto *N = const_cast<ExplodedNode *>(EI->begin()->getErrorNode());
       if (N) Src.push_back(N);
     }
 
     ViewGraph(Src);