When initialized, the index of the ElementRegion was unsigned. But the index
value of the ArraySubscriptExpr is signed. This inconsistency caused the value
of the array element retrieved to be UnknownVal despite it was initialized to
symbolic.

This is only a hack. Real fix of this problem is required.

llvm-svn: 60207

llvm-svn: 60205

GDMContext.

llvm-svn: 60150

llvm-svn: 59975

There might be other, similar bugs lurking there.

llvm-svn: 59974

One design problem that is emerging is the signed-ness problem during static
analysis. Many unsigned value have to be converted into signed value because
it partipates in operations with signed values. 

On the other hand, we cannot blindly make all values occuring in static analysis
signed, because we do have cases where unsignedness is required, for example,
integer overflow detection.

llvm-svn: 59957

llvm-svn: 59943

llvm-svn: 59932

llvm-svn: 59930

llvm-svn: 59899

llvm-svn: 59870

ConcreteInt index for now.

llvm-svn: 59869

llvm-svn: 59619

llvm-svn: 59571

handle the case that the array element is of structure type when bind the whole array to a single value (for example, UnknownVal, UndefinedVal).

llvm-svn: 59521

environment.

llvm-svn: 59407

 - RegionView and RegionViewMap is introduced to assist back-mapping from
   super region to subregions.
 - GDM is used to carry RegionView information.
 - AnonTypedRegion is added to represent a typed region introduced by pointer
   casting. Later AnonTypedRegion can be used in other similar cases, e.g.,
   malloc()'ed region.
 - The specific conversion is delegated to store manager.

llvm-svn: 59382

llvm-svn: 59356

llvm-svn: 59240

it to be evaluated by APSInt::operators.

llvm-svn: 59238

llvm-svn: 59235

StoreManager::BindDecl now takes an SVal* for the initialization value instead of an Expr* (which can be null).  Lazy symbolication of conjured symbols is now the sole responsibility of GRExprEngine.

llvm-svn: 59151

Implement RegionStoreManager::RemoveDeadBindings(). This prunes several false warning caused by removal of symbolic constraints. Currently we just mark all symbols live. Further optimization for dead binding removal needed.

llvm-svn: 58982

available, things get much simplified.

One addition is that CompoundLiteralExpr can appear both in rvalue and lvalue
context.

llvm-svn: 58837

llvm-svn: 58833

   sets the whole struct to Unknown. Then we cannot assume the V passed to
   BindStruct() is always a CompoundVal. When it is an UnknownVal, we call
   BindStructToVal(UnknownVal).

2. Change the signature of InitializeStructToUndefined() to BindStructToVal()
   to reuse the code.

llvm-svn: 58564

Simplify interface. We can get canonical type from the base region directly. No need for an extra type argument.

llvm-svn: 58507

llvm-svn: 58506

llvm-svn: 58504

llvm-svn: 58496

Implement load from struct region. Instead of returning an UnknownVal(), we create a CompoundVal by loading from each field of the struct.

llvm-svn: 58494

BindDecl better describes what the function does:
  - Bind the VarDecl to its memory region
  - Bind the memory region to some initial value.

llvm-svn: 58359

- GRExprEngine::VisitCompoundLiteral...
   (1) visits the initializer list (generating ExplodedNodes)
   (2) creates a CompoundMemRegion for the literal
   (3) creates a new state with the bound literal values using
       GRStateManager::BindCompoundLiteral

- GRStateManager::BindCompoundLiteral simply calls 
  StoreManager::BindCompoundLiteral to get a new store and returns a persistent
  GRState with that store.

- BasicStore::BindCompoundLiteral simply returns the same store, as it
  doesn't handle field sensitivity
  
- RegionStore::BindCompoundLiteral currently fires an assert (pending discussion
  of how to best implement mappings for CompoundLiteralRegion).

llvm-svn: 58277

llvm-svn: 58247

llvm-svn: 58243

llvm-svn: 58236

llvm-svn: 58182

Simplify ArrayToPointer conversion. Actually the only thing we need to do is to get the first element region. It is not necessary to care about the kind of the base array region.

llvm-svn: 58181

for StringLiteral lvalue evaluation, instead of directly returning a
loc::StringLiteralVal by the Environment.

llvm-svn: 58138

Added method "getSelfRegion" to Store.  This method returns the region associated with the "this" or "self" object (C++ and Objective-C respectively).

llvm-svn: 58107