to eliminate the use of loc::SymbolVal.

llvm-svn: 68685

of messages sent to nil.

llvm-svn: 68683

nil receivers in message expressions.

llvm-svn: 68672

llvm-svn: 68661

Enhance analyzer reasoning about sending messages to nil.  A nil receiver returns 0 for scalars of size <= sizeof(void*).

llvm-svn: 68629

"The attached patch generates warnings of cases where an ObjC message is sent to
a nil object and the size of return type of that message is larger than the size
of void pointer. This may result in undefined return values as described in PR
2718.  The patch also includes test cases."

llvm-svn: 68585

are considered 'live'. This hack isn't needed anymore because we have a
separation in the path-sensitive analyzer between variable names and bindings;
the analyzer can continue to reason about the storage of a variable after its
name is no longer directly referenced.  Now the live variables analysis literally means "is this name live".

Along this line, update the dead stores checker to explicitly look for variables
whose values have escaped.

llvm-svn: 68504

llvm-svn: 68502

llvm-svn: 68497

llvm-svn: 68496

llvm-svn: 68495

pieces between block entrance and block end unless necessary.

llvm-svn: 68483

ExplodedGraph backwards. That may inadvertently result in reverse control-flow
edges in the PathDiagostic.

llvm-svn: 68477

llvm-svn: 68476

contexts".  This allows us to use a stack of contexts to keep track of what control-flow pieces to include when exiting blocks like 'if', 'for', etc.

llvm-svn: 68473

llvm-svn: 68470

llvm-svn: 68406

the subtle ownership issues of such objects.

llvm-svn: 68397

when creating symbolic values, we distinguish between location and non-location
values. For location values, we create a symbolic region instead of a
loc::SymbolVal.

llvm-svn: 68373

llvm-svn: 68345

llvm-svn: 68283

llvm-svn: 68282

llvm-svn: 68281

llvm-svn: 68275

llvm-svn: 68274

llvm-svn: 68273

enclosing statement when jumping to a subexpression.

llvm-svn: 68244

llvm-svn: 68236

- When processing BlockEdges with terminators, using the condition as the
  control-flow point for terminators that are expressions (e.g., '&&', '?')
- When processing events, allow intra-compound statement "jumping"

llvm-svn: 68228

start of the function/method.

llvm-svn: 68217

intra-compound statement jumps unless they are between terminators (i.e.,
branches).

llvm-svn: 68216

should only be an error if that value is consumed. This fix was largely
accomplished by moving 'isConsumedExpr' back to ParentMap.

llvm-svn: 68195

  instead of a FullSourceLoc. This resulted in a bunch of small edits in various
  clients.
- Updated BugReporter to include an alternate PathDiagnostic generation
  algorithm for PathDiagnosticClients desiring more control-flow pieces.

llvm-svn: 68193

llvm-svn: 68157

refactoring to make this possible (no functionality change).

llvm-svn: 68141

it.  Will discuss offline whether symbolic regions should by typed or typeless.

llvm-svn: 68070

llvm-svn: 68068

llvm-svn: 68063

llvm-svn: 68052

loc::SymbolVal/nonloc::SymbolVal probing.

llvm-svn: 68049