Unify the code path for the Dead Stores checker to always use the BugReporter interface.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@53054 91177308-0d34-0410-b5e6-96231b3b80d8

Driver/AnalysisConsumer.cpp

@@ -108,7 +108,6 @@ namespace {
     llvm::OwningPtr<CFG> cfg;
     llvm::OwningPtr<LiveVariables> liveness;
     llvm::OwningPtr<ParentMap> PM;
-    llvm::OwningPtr<PathDiagnosticClient> PD;
 
   public:
     AnalysisManager(AnalysisConsumer& c, Decl* d, Stmt* b) 
@@ -124,7 +123,8 @@ namespace {
     }
     
     virtual ParentMap& getParentMap() {
-      if (!PM) PM.reset(new ParentMap(getBody()));
+      if (!PM) 
+        PM.reset(new ParentMap(getBody()));
       return *PM.get();
     }
     
@@ -145,10 +145,10 @@ namespace {
     }
     
     virtual PathDiagnosticClient* getPathDiagnosticClient() {
-      if (PD.get() == 0 && !C.HTMLDir.empty())
-        PD.reset(CreateHTMLDiagnosticClient(C.HTMLDir, C.PP, C.PPF));
+      if (C.PD.get() == 0 && !C.HTMLDir.empty())
+        C.PD.reset(CreateHTMLDiagnosticClient(C.HTMLDir, C.PP, C.PPF));
       
-      return PD.get();      
+      return C.PD.get();      
     }
       
     virtual LiveVariables& getLiveVariables() {
@@ -267,9 +267,8 @@ void AnalysisConsumer::HandleCode(Decl* D, Stmt* Body, Actions actions) {
 //===----------------------------------------------------------------------===//
 
 static void ActionDeadStores(AnalysisManager& mgr) {
-  CheckDeadStores(mgr.getCFG(), mgr.getContext(),
-                  mgr.getLiveVariables(), mgr.getParentMap(),
-                  mgr.getDiagnostic());
+  BugReporter BR(mgr);  
+  CheckDeadStores(mgr.getLiveVariables(), BR);
 }
 
 static void ActionUninitVals(AnalysisManager& mgr) {

include/clang/Analysis/LocalCheckers.h

@@ -27,12 +27,9 @@ class BugType;
 class LangOptions;
 class ParentMap;
 class LiveVariables;
+class BugReporter;
   
-void CheckDeadStores(CFG& cfg, ASTContext &Ctx, ParentMap& Parents,
-                     Diagnostic &Diags); 
-  
-  void CheckDeadStores(CFG& cfg, ASTContext &Ctx, LiveVariables& L,
-                       ParentMap& Parents, Diagnostic &Diags); 
+void CheckDeadStores(LiveVariables& L, BugReporter& BR); 
   
 void CheckUninitializedValues(CFG& cfg, ASTContext& Ctx, Diagnostic& Diags,
                               bool FullUninitTaint=false);
@@ -41,7 +38,6 @@ GRTransferFuncs* MakeGRSimpleValsTF();
 GRTransferFuncs* MakeCFRefCountTF(ASTContext& Ctx, bool GCEnabled,
                                   bool StandardWarnings,
                                   const LangOptions& lopts); 
-BugType* MakeDeadStoresChecker();
   
 } // end namespace clang
 

include/clang/Analysis/PathSensitive/BugReporter.h

@@ -15,12 +15,15 @@
 #ifndef LLVM_CLANG_ANALYSIS_BUGREPORTER
 #define LLVM_CLANG_ANALYSIS_BUGREPORTER
 
+#include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/SourceLocation.h"
 #include "clang/Analysis/PathSensitive/ValueState.h"
 #include "clang/Analysis/PathSensitive/ExplodedGraph.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallSet.h"
 #include <vector>
+#include <list>
+
 
 namespace clang {
   
@@ -168,7 +171,7 @@ public:
   }
   
   SourceManager& getSourceManager() {
-    return getContext().getSourceManager();
+    return D.getSourceManager();
   }
   
   CFG& getCFG() {
@@ -223,6 +226,66 @@ public:
   }
 };
   
+
+class DiagBugReport : public RangedBugReport {
+  std::list<std::string> Strs;
+  FullSourceLoc L;
+  const char* description;
+public:
+  DiagBugReport(const char* desc, BugType& D, FullSourceLoc l) :
+  RangedBugReport(D, NULL), L(l), description(desc) {}
+  
+  virtual ~DiagBugReport() {}
+  virtual FullSourceLoc getLocation(SourceManager&) { return L; }
+  
+  virtual const char* getDescription() const {
+    return description;
+  }
+  
+  void addString(const std::string& s) { Strs.push_back(s); }  
+  
+  typedef std::list<std::string>::const_iterator str_iterator;
+  str_iterator str_begin() const { return Strs.begin(); }
+  str_iterator str_end() const { return Strs.end(); }
+};
+
+class DiagCollector : public DiagnosticClient {
+  std::list<DiagBugReport> Reports;
+  BugType& D;
+public:
+  DiagCollector(BugType& d) : D(d) {}
+  
+  virtual ~DiagCollector() {}
+  
+  virtual void HandleDiagnostic(Diagnostic &Diags, 
+                                Diagnostic::Level DiagLevel,
+                                FullSourceLoc Pos,
+                                diag::kind ID,
+                                const std::string *Strs,
+                                unsigned NumStrs,
+                                const SourceRange *Ranges, 
+                                unsigned NumRanges) {
+    
+    // FIXME: Use a map from diag::kind to BugType, instead of having just
+    //  one BugType.
+    
+    Reports.push_back(DiagBugReport(Diags.getDescription(ID), D, Pos));
+    DiagBugReport& R = Reports.back();
+    
+    for ( ; NumRanges ; --NumRanges, ++Ranges)
+      R.addRange(*Ranges);
+    
+    for ( ; NumStrs ; --NumStrs, ++Strs)
+      R.addString(*Strs);    
+  }
+  
+  // Iterators.
+  
+  typedef std::list<DiagBugReport>::iterator iterator;
+  iterator begin() { return Reports.begin(); }
+  iterator end() { return Reports.end(); }
+};
+  
 } // end clang namespace
 
 #endif

lib/Analysis/DeadStores.cpp

@@ -44,8 +44,8 @@ public:
     
     std::string msg = inEnclosing
       ? "Although the value stored to '" + name +
-        "' is used in the enclosing expression, the value is never actually read"
-        " from '" + name + "'"
+        "' is used in the enclosing expression, the value is never actually"
+        " read from '" + name + "'"
       : "Value stored to '" + name + "' is never read";
     
     return Diags.getCustomDiagID(Diagnostic::Warning, msg.c_str());                               
@@ -143,116 +143,38 @@ public:
   
 } // end anonymous namespace
 
-//===----------------------------------------------------------------------===//
-// Driver function to invoke the Dead-Stores checker on a CFG.
-//===----------------------------------------------------------------------===//
-
-void clang::CheckDeadStores(CFG& cfg, ASTContext &Ctx,
-                            ParentMap& Parents, Diagnostic &Diags) {  
-  LiveVariables L(cfg);
-  L.runOnCFG(cfg);
-  CheckDeadStores(cfg, Ctx, L, Parents, Diags);
-}
-
-void clang::CheckDeadStores(CFG& cfg, ASTContext &Ctx, LiveVariables& L,
-                            ParentMap& Parents, Diagnostic &Diags) {  
-
-  DeadStoreObs A(Ctx, Diags, Diags.getClient(), Parents);
-  L.runOnAllBlocks(cfg, &A);
-}
-
 //===----------------------------------------------------------------------===//
 // BugReporter-based invocation of the Dead-Stores checker.
 //===----------------------------------------------------------------------===//
   
 namespace {
   
-class VISIBILITY_HIDDEN DiagBugReport : public RangedBugReport {
-  std::list<std::string> Strs;
-  FullSourceLoc L;
-  const char* description;
+class SimpleBugType : public BugTypeCacheLocation {
+  const char* name;  
 public:
-  DiagBugReport(const char* desc, BugType& D, FullSourceLoc l) :
-    RangedBugReport(D, NULL), L(l), description(desc) {}
+  SimpleBugType(const char* n) : name(n) {}
   
-  virtual ~DiagBugReport() {}
-  virtual FullSourceLoc getLocation(SourceManager&) { return L; }
-  
-  virtual const char* getDescription() const {
-    return description;
-  }
-  
-  void addString(const std::string& s) { Strs.push_back(s); }  
-  
-  typedef std::list<std::string>::const_iterator str_iterator;
-  str_iterator str_begin() const { return Strs.begin(); }
-  str_iterator str_end() const { return Strs.end(); }
-};
-  
-class VISIBILITY_HIDDEN DiagCollector : public DiagnosticClient {
-  std::list<DiagBugReport> Reports;
-  BugType& D;
-public:
-  DiagCollector(BugType& d) : D(d) {}
-  
-  virtual ~DiagCollector() {}
-  
-  virtual void HandleDiagnostic(Diagnostic &Diags, 
-                                Diagnostic::Level DiagLevel,
-                                FullSourceLoc Pos,
-                                diag::kind ID,
-                                const std::string *Strs,
-                                unsigned NumStrs,
-                                const SourceRange *Ranges, 
-                                unsigned NumRanges) {
-    
-    // FIXME: Use a map from diag::kind to BugType, instead of having just
-    //  one BugType.
-    
-    Reports.push_back(DiagBugReport(Diags.getDescription(ID), D, Pos));
-    DiagBugReport& R = Reports.back();
-    
-    for ( ; NumRanges ; --NumRanges, ++Ranges)
-      R.addRange(*Ranges);
-    
-    for ( ; NumStrs ; --NumStrs, ++Strs)
-      R.addString(*Strs);    
-  }
-  
-  // Iterators.
-  
-  typedef std::list<DiagBugReport>::iterator iterator;
-  iterator begin() { return Reports.begin(); }
-  iterator end() { return Reports.end(); }
-};
-  
-class VISIBILITY_HIDDEN DeadStoresChecker : public BugTypeCacheLocation {
-public:
   virtual const char* getName() const {
-    return "dead store";
+    return name;
   }
+};
+} // end anonymous namespace
 
-  virtual const char* getDescription() const {
-    return "Value stored to variable is never subsequently read.";
-  }
+//===----------------------------------------------------------------------===//
+// Driver function to invoke the Dead-Stores checker on a CFG.
+//===----------------------------------------------------------------------===//
 
-  virtual void EmitWarnings(BugReporter& BR) {
+void clang::CheckDeadStores(LiveVariables& L, BugReporter& BR) {  
+
+  SimpleBugType BT("dead store");
+  DiagCollector C(BT);  
 
-    // Run the dead store checker and collect the diagnostics.
-    DiagCollector C(*this);    
   DeadStoreObs A(BR.getContext(), BR.getDiagnostic(), C, BR.getParentMap());
-    
-
-    BR.getLiveVariables().runOnAllBlocks(BR.getCFG(), &A);
+  L.runOnAllBlocks(BR.getCFG(), &A);
   
   // Emit the bug reports.
   
   for (DiagCollector::iterator I = C.begin(), E = C.end(); I != E; ++I)
     BR.EmitWarning(*I);  
 }
-};
-} // end anonymous namespace
 
-BugType* clang::MakeDeadStoresChecker() {
-  return new DeadStoresChecker();
-}

lib/Analysis/GRSimpleVals.cpp

@@ -350,9 +350,6 @@ void GRSimpleVals::RegisterChecks(GRExprEngine& Eng) {
   Eng.Register(new BadMsgExprArg());
   Eng.Register(new BadReceiver());
   
-  // Flow-sensitive checks.
-  Eng.Register(MakeDeadStoresChecker());  
-  
   // Add extra checkers.
   ASTContext& Ctx = Eng.getContext();
   ValueStateManager* VMgr = &Eng.getStateManager();