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and unsigned integer values for symbolic values. This is an intermediate solution (i.e. hack) until we support extension/truncation of symbolic integers.
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to statically type various methods in SValuator/GRState as required either a
defined value or a defined-but-possibly-unknown value. This leads to various
logic cleanups in GRExprEngine, and lets the compiler enforce via type checking
our assumptions about what symbolic values are possibly undefined and what are
not.
Along the way, clean up some of the static analyzer diagnostics regarding the uses of uninitialized values.
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- Remove the 'isFeasible' flag from all uses of 'Assume'.
- Remove the 'Assume' methods from GRStateManager. Now the only way to
create a new GRState with an assumption is to use the new 'assume' methods
in GRState.
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Zhongxing and I discussed by email.
Main changes:
- Removed SymIntConstraintVal and SymIntConstraint
- Added SymExpr as a parent class to SymbolData, SymSymExpr, SymIntExpr
- Added nonloc::SymExprVal to wrap SymExpr
- SymbolRef is now just a typedef of 'const SymbolData*'
- Bunch of minor code cleanups in how some methods were invoked (no functionality change)
This changes are part of a long-term plan to have full symbolic expression
trees. This will be useful for lazily evaluating complicated expressions.
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representing symbolic expressions like 'x'+3 and 'x'+'y'. The design is
subjected to change later when we fix the class hierarchy of symbolic
expressions.
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<rdar://problem/6704930> involving SimpleConstraintManager not reasoning well
about symbolic constraint values involving arithmetic operators.
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values. Indicating this in 'canReasonAbout' allows GRExprEngine to recover
path-sensitivity in some cases.
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a ConstraintManager can usefully reason about the given SVal.
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ConstraintManager:
- constify getSymVal()
BasicConstraintManager:
- Pull out logic that would be common to ConstraintManagers of a similar nature
and put them in a parent class called 'SimpleConstraintManager'.
RangeConstraintManager:
- Added a new prototype ConstraintManager to track ranges of variables! This
ConstraintManager keeps tracks of ranges of concrete integers that a symbolic
integer may have.
AnalysisConsumer:
- Add driver option to use RangeConstraintManager with GRExprEngine-based
analyses.
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