Move GRTransferFunc* into ValueStateManager, and move the assumption logic there as well.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@53743 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 181 deletions

diff --git a/lib/Analysis/GRExprEngine.cpp b/lib/Analysis/GRExprEngine.cpp
index 5159f4a4cd..c4278b1e5b 100644
--- a/lib/Analysis/GRExprEngine.cpp
+++ b/lib/Analysis/GRExprEngine.cpp
@@ -123,7 +123,6 @@ GRExprEngine::GRExprEngine(CFG& cfg, Decl& CD, ASTContext& Ctx,
     StateMgr(G.getContext(), CreateBasicStoreManager(G.getAllocator()),
              G.getAllocator(), G.getCFG()),
     BasicVals(StateMgr.getBasicValueFactory()),
-    TF(NULL), // FIXME
     SymMgr(StateMgr.getSymbolManager()),
     CurrentStmt(NULL),
   NSExceptionII(NULL), NSExceptionInstanceRaiseSelectors(NULL),
@@ -178,8 +177,8 @@ void GRExprEngine::EmitWarnings(BugReporterData& BRData) {
 }
 
 void GRExprEngine::setTransferFunctions(GRTransferFuncs* tf) {
-  TF = tf;
-  TF->RegisterChecks(*this);
+  StateMgr.TF = tf;
+  getTF().RegisterChecks(*this);
 }
 
 void GRExprEngine::AddCheck(GRSimpleAPICheck* A, Stmt::StmtClass C) {
@@ -252,7 +251,7 @@ void GRExprEngine::ProcessStmt(Stmt* S, StmtNodeBuilder& builder) {
     SaveAndRestore<bool> OldPurgeDeadSymbols(Builder->PurgingDeadSymbols);
     Builder->PurgingDeadSymbols = true;
     
-    TF->EvalDeadSymbols(Tmp, *this, *Builder, EntryNode, S, 
+    getTF().EvalDeadSymbols(Tmp, *this, *Builder, EntryNode, S, 
                         CleanedState, DeadSymbols);
 
     if (!Builder->BuildSinks && !Builder->HasGeneratedNode)
@@ -964,13 +963,13 @@ void GRExprEngine::EvalStore(NodeSet& Dst, Expr* Ex, NodeTy* Pred,
 
   assert (!location.isUndef());
   
-  TF->EvalStore(Dst, *this, *Builder, Ex, Pred, St, location, Val);
+  getTF().EvalStore(Dst, *this, *Builder, Ex, Pred, St, location, Val);
   
   // Handle the case where no nodes where generated.  Auto-generate that
   // contains the updated state if we aren't generating sinks.
   
   if (!Builder->BuildSinks && Dst.size() == size && !Builder->HasGeneratedNode)
-    TF->GRTransferFuncs::EvalStore(Dst, *this, *Builder, Ex, Pred, St,
+    getTF().GRTransferFuncs::EvalStore(Dst, *this, *Builder, Ex, Pred, St,
                                    location, Val);
 }
 
@@ -1939,7 +1938,7 @@ void GRExprEngine::EvalReturn(NodeSet& Dst, ReturnStmt* S, NodeTy* Pred) {
   SaveAndRestore<bool> OldSink(Builder->BuildSinks);
   SaveOr OldHasGen(Builder->HasGeneratedNode);
 
-  TF->EvalReturn(Dst, *this, *Builder, S, Pred);
+  getTF().EvalReturn(Dst, *this, *Builder, S, Pred);
   
   // Handle the case where no nodes where generated.
   
@@ -2240,7 +2239,7 @@ void GRExprEngine::EvalBinOp(ExplodedNodeSet<ValueState>& Dst, Expr* Ex,
   unsigned size = Dst.size();
   SaveOr OldHasGen(Builder->HasGeneratedNode);
   
-  TF->EvalBinOpNN(Dst, *this, *Builder, Op, Ex, L, R, Pred);
+  getTF().EvalBinOpNN(Dst, *this, *Builder, Op, Ex, L, R, Pred);
   
   if (!Builder->BuildSinks && Dst.size() == size &&
       !Builder->HasGeneratedNode)
@@ -2248,177 +2247,6 @@ void GRExprEngine::EvalBinOp(ExplodedNodeSet<ValueState>& Dst, Expr* Ex,
 }
 
 //===----------------------------------------------------------------------===//
-// "Assume" logic.
-//===----------------------------------------------------------------------===//
-
-const ValueState* GRExprEngine::Assume(const ValueState* St, LVal Cond,
-                                       bool Assumption, bool& isFeasible) {
-                                             
-  St = AssumeAux(St, Cond, Assumption, isFeasible);
-  
-  return isFeasible ? TF->EvalAssume(*this, St, Cond, Assumption, isFeasible)
-                    : St;
-}
-
-const ValueState* GRExprEngine::AssumeAux(const ValueState* St, LVal Cond,
-                                          bool Assumption, bool& isFeasible) {
-                                       
-  switch (Cond.getSubKind()) {
-    default:
-      assert (false && "'Assume' not implemented for this LVal.");
-      return St;
-
-    case lval::SymbolValKind:
-      if (Assumption)
-        return AssumeSymNE(St, cast<lval::SymbolVal>(Cond).getSymbol(),
-                           BasicVals.getZeroWithPtrWidth(), isFeasible);
-      else
-        return AssumeSymEQ(St, cast<lval::SymbolVal>(Cond).getSymbol(),
-                           BasicVals.getZeroWithPtrWidth(), isFeasible);
-
-
-    case lval::DeclValKind:
-    case lval::FuncValKind:
-    case lval::GotoLabelKind:
-    case lval::StringLiteralValKind:
-      isFeasible = Assumption;
-      return St;
-      
-    case lval::FieldOffsetKind:
-      return AssumeAux(St, cast<lval::FieldOffset>(Cond).getBase(),
-                       Assumption, isFeasible);
-      
-    case lval::ArrayOffsetKind:
-      return AssumeAux(St, cast<lval::ArrayOffset>(Cond).getBase(),
-                       Assumption, isFeasible);
-      
-    case lval::ConcreteIntKind: {
-      bool b = cast<lval::ConcreteInt>(Cond).getValue() != 0;
-      isFeasible = b ? Assumption : !Assumption;      
-      return St;
-    }
-  }
-}
-
-const ValueState* GRExprEngine::Assume(const ValueState* St, NonLVal Cond,
-                                       bool Assumption, bool& isFeasible) {
-
-  St = AssumeAux(St, Cond, Assumption, isFeasible);
-
-  return isFeasible ? TF->EvalAssume(*this, St, Cond, Assumption, isFeasible)
-                    : St;
-}
-
-const ValueState* GRExprEngine::AssumeAux(const ValueState* St, NonLVal Cond,
-                                          bool Assumption, bool& isFeasible) {  
-  switch (Cond.getSubKind()) {
-    default:
-      assert (false && "'Assume' not implemented for this NonLVal.");
-      return St;
-      
-      
-    case nonlval::SymbolValKind: {
-      nonlval::SymbolVal& SV = cast<nonlval::SymbolVal>(Cond);
-      SymbolID sym = SV.getSymbol();
-      
-      if (Assumption)
-        return AssumeSymNE(St, sym, BasicVals.getValue(0, SymMgr.getType(sym)),
-                           isFeasible);
-      else
-        return AssumeSymEQ(St, sym, BasicVals.getValue(0, SymMgr.getType(sym)),
-                           isFeasible);
-    }
-      
-    case nonlval::SymIntConstraintValKind:
-      return
-        AssumeSymInt(St, Assumption,
-                     cast<nonlval::SymIntConstraintVal>(Cond).getConstraint(),
-                     isFeasible);
-      
-    case nonlval::ConcreteIntKind: {
-      bool b = cast<nonlval::ConcreteInt>(Cond).getValue() != 0;
-      isFeasible = b ? Assumption : !Assumption;      
-      return St;
-    }
-      
-    case nonlval::LValAsIntegerKind: {
-      return AssumeAux(St, cast<nonlval::LValAsInteger>(Cond).getLVal(),
-                       Assumption, isFeasible);
-    }
-  }
-}
-
-const ValueState* GRExprEngine::AssumeSymNE(const ValueState* St,
-                                            SymbolID sym, const llvm::APSInt& V,
-                                            bool& isFeasible) {
-  
-  // First, determine if sym == X, where X != V.
-  if (const llvm::APSInt* X = St->getSymVal(sym)) {
-    isFeasible = *X != V;
-    return St;
-  }
-  
-  // Second, determine if sym != V.
-  if (St->isNotEqual(sym, V)) {
-    isFeasible = true;
-    return St;
-  }
-      
-  // If we reach here, sym is not a constant and we don't know if it is != V.
-  // Make that assumption.
-  
-  isFeasible = true;
-  return StateMgr.AddNE(St, sym, V);
-}
-
-const ValueState* GRExprEngine::AssumeSymEQ(const ValueState* St, SymbolID sym,
-                                            const llvm::APSInt& V, bool& isFeasible) {
-  
-  // First, determine if sym == X, where X != V.
-  if (const llvm::APSInt* X = St->getSymVal(sym)) {
-    isFeasible = *X == V;
-    return St;
-  }
-  
-  // Second, determine if sym != V.
-  if (St->isNotEqual(sym, V)) {
-    isFeasible = false;
-    return St;
-  }
-  
-  // If we reach here, sym is not a constant and we don't know if it is == V.
-  // Make that assumption.
-  
-  isFeasible = true;
-  return StateMgr.AddEQ(St, sym, V);
-}
-
-const ValueState* GRExprEngine::AssumeSymInt(const ValueState* St,
-                                             bool Assumption,
-                                             const SymIntConstraint& C,
-                                             bool& isFeasible) {
-  
-  switch (C.getOpcode()) {
-    default:
-      // No logic yet for other operators.
-      isFeasible = true;
-      return St;
-      
-    case BinaryOperator::EQ:
-      if (Assumption)
-        return AssumeSymEQ(St, C.getSymbol(), C.getInt(), isFeasible);
-      else
-        return AssumeSymNE(St, C.getSymbol(), C.getInt(), isFeasible);
-      
-    case BinaryOperator::NE:
-      if (Assumption)
-        return AssumeSymNE(St, C.getSymbol(), C.getInt(), isFeasible);
-      else
-        return AssumeSymEQ(St, C.getSymbol(), C.getInt(), isFeasible);
-  }
-}
-
-//===----------------------------------------------------------------------===//
 // Visualization.
 //===----------------------------------------------------------------------===//
 
@@ -2733,7 +2561,7 @@ void GRExprEngine::ViewGraph(bool trim) {
   else {
     GraphPrintCheckerState = this;
     GraphPrintSourceManager = &getContext().getSourceManager();
-    GraphCheckerStatePrinter = TF->getCheckerStatePrinter();
+    GraphCheckerStatePrinter = getTF().getCheckerStatePrinter();
 
     llvm::ViewGraph(*G.roots_begin(), "GRExprEngine");
     
@@ -2748,7 +2576,7 @@ void GRExprEngine::ViewGraph(NodeTy** Beg, NodeTy** End) {
 #ifndef NDEBUG
   GraphPrintCheckerState = this;
   GraphPrintSourceManager = &getContext().getSourceManager();
-  GraphCheckerStatePrinter = TF->getCheckerStatePrinter();
+  GraphCheckerStatePrinter = getTF().getCheckerStatePrinter();
   
   GRExprEngine::GraphTy* TrimmedG = G.Trim(Beg, End);