llvm-svn: 92121

no extra safety anyway.

llvm-svn: 91207

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

llvm-svn: 91107

- 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

llvm-svn: 90585

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

Enhance LiveVariables to understand that blocks can extend the liveness of a variable by "capturing" them in a BlockExpr.

This required two changes:

1) Added 'getReferencedgetReferencedBlockVars()' to AnalysisContext so
that clients can iterate over the "captured" variables in a block.

2) Modified LiveVariables to take an AnalysisContext& in its
constructor and to call getReferencedgetReferencedBlockVars() when it
processes a BlockExpr*.

llvm-svn: 89924

AnalysisManager periodically cleanup its AnalysisContextManager and LocationContextManager objects,
as they don't need to forever retain all the CFGs ever created when analyzing a file.

llvm-svn: 84684

llvm-svn: 81346

AnalysisContext should never change. Along the way, propagate some constness
around.

llvm-svn: 79701

llvm-svn: 79700

SelfRegion represented the object bound to 'self' (when analyzing Objective-C
methods) upon entry to a method. Having this region stored on the side ignores
the current stack frame that we might be analyzing (among other things), and is
a problem for interprocedural analysis.

For RegionStoreManager, the value for SelfRegion is just lazily created.

For BasicStoreManager, the value for SelfRegion is bound eagerly to 'self', but
no explicit tracking of SelfRegion on the side is made.

As part of this change, remove the restriction in BasicStoreManager that we only
track ivars for 'self'. This shouldn't actually change anything in terms of
precision, and simplifies the logic.

llvm-svn: 79694

llvm-svn: 77961

llvm-svn: 77651

AnalysisContext.

llvm-svn: 77563