Enhance understanding of VarRegions referenced by a block whose declarations are outside the current stack frame.  Fixes <rdar://problem/7462324>.

llvm-svn: 91107

llvm-svn: 91100

llvm-svn: 91085

Fix null dereference in OSAtomicChecker and special case SymbolicRegions.  We still aren't handling them correctly; I've added to failing test cases to test/Analysis/NSString-failed-cases.m that should pass and then be merged in to test/Analysis/NSString.m.

llvm-svn: 90993

llvm-svn: 90968

Otherwise, even when real evaluation occurs, the previous fake auto 
transitions would still be in the destination set, causing fake state 
bifurcation.

llvm-svn: 90967

instead of the ElementRegion obtained from casts.

Test cast: the leak cannot occur bacause the true branch cannot be taken.

llvm-svn: 90964

llvm-svn: 90953

repeatedly.

llvm-svn: 90952

by the test case in PR 5627.  Essentially we shouldn't clear the
ExplodedNodeSet where we deposit newly constructed nodes if that set
is the 'Dst' set passed in.  It is not okay to clear that set because
it may already contain nodes.

llvm-svn: 90931

llvm-svn: 90847

- Refactor the MemRegion hierarchy to distinguish between different StackSpaceRegions for locals and parameters.
- VarRegions for "captured" variables now have the BlockDataRegion as their super region (except those passed by reference)
- Add transfer function support to GRExprEngine for BlockDeclRefExprs.

This change also supports analyzing blocks as an analysis entry point
(top-of-the-stack), which required pushing more context-sensitivity
around in the MemRegion hierarchy via the use of LocationContext
objects.  Functionally almost everything is the same, except we track
LocationContexts in a few more areas and StackSpaceRegions now refer
to a StackFrameContext object.  In the future we will need to modify
MemRegionManager to allow multiple StackSpaceRegions in flight at once
(for the analysis of multiple stack frames).

llvm-svn: 90809

handler to this interface.
GRExprEngine::CheckerEvalCall() will return true if one of the checkers has
processed the node. In the future this might return void when we have some 
default checker.

llvm-svn: 90755

llvm-svn: 90585

llvm-svn: 90584

llvm-svn: 90583

llvm-svn: 90582

Rename instance variable to avoid name conflict with parameters, and modify addTransition() to compare the correct state values.

llvm-svn: 90552

Allow BlockInvocationContext to wrap either a BlockDecl* or a BlockDataRegion*, giving us choice in our degree of context-sensitivity.

llvm-svn: 90516

llvm-svn: 90509

Refactor FoldingSet profiling code for LocationContexts, and add a new BlockInvocationContext to represent the invocation of a block.

llvm-svn: 90506

llvm-svn: 90503

llvm-svn: 90499

Tweak handling of BlockDataRegions in RegionStoreManager::RemoveDeadBindings():  only the VarRegions for variables marked with the '__block' annotation should have their lifetime extended by a BlockDataRegion.

llvm-svn: 90462

Patch by Lei Zhang!

llvm-svn: 90444

llvm-svn: 90443

Add value invalidation logic for block-captured variables.  Conceptually invoking a block (without specific reasoning of what the block does) can invalidate any value to it by reference when the block was created.

llvm-svn: 90431

Make BlockDataRegion::referenced_vars_iterator an actual class that enforces that all MemRegions iterated over are VarRegions.

llvm-svn: 90430

llvm-svn: 90424

Add batch version of 'StoreManager::InvalidateRegion()' for invalidating multiple regions as once.  After adopting this in the CFRefCount::EvalCall(), we see a reduction in analysis time of 1.5% when analyzing all of SQLite3.

llvm-svn: 90405

Add a heuristic to the dead stores checker to prune dead stores for variables annotated with '__block'.  This is overly conservative, but now the analyzer doesn't report dead stores for variables that can be updated by a block call.

llvm-svn: 90364

we don't need to use the DoneEvaluation hack when check for 
ObjCMessageExpr.

PreVisitObjCMessageExpr() only checks for undefined receiver or arguments.

Add checker interface EvalNilReceiver(). This is a 'once-and-done' interface.

llvm-svn: 90296

llvm-svn: 90267

Fix early-return logic in scanReachableSymbols() to match the rest of the recursive logic in the methods of ScanReachableSymbols.

llvm-svn: 90245

llvm-svn: 90139

llvm-svn: 90137

llvm-svn: 90086

llvm-svn: 90084

llvm-svn: 90060

llvm-svn: 90034