Patch by chris.wailes@gmail.com.
* The TestedVarsVisitor was folded into the ConsumedStmtVisitor.
* The VarTestResult class was updated to allow these changes.
* The PropagationInfo class was updated for the same reasons.
* Correctly handle short-circuiting of Boolean operations.
* Blocks are now marked as unreachable when we can statically prove we will
never branch to them.
* Unreachable blocks are skipped by the analysis.
llvm-svn: 189594
The change was made for readability, as the PropagationInfo objects don't
always contain a status. This is submitted as a separate patch because it
touches a lot of lines and I don't want it cluttering up the next patch.
Patch by chris.wailes@gmail.com.
llvm-svn: 189278
Patch by chris.wailes@gmail.com. The following functionality was added:
* The same functionality is now supported for both CXXOperatorCallExprs and CXXMemberCallExprs.
* Factored out some code in StmtVisitor.
* Removed variables from the state map when their destructors are encountered.
* Started adding documentation for the consumed analysis attributes.
llvm-svn: 189059
The cmake-clang-x86_64 was upset:
error: 'template<class ImplClass, class RetTy> class clang::ConstStmtVisitor' used without template parameters
llvm-svn: 188211
Reviewed by delesley, dblaikie.
Add the annotations and code needed to support a basic 'consumed' analysis.
Summary:
This new analysis is based on academic literature on linear types. It tracks
the state of a value, either as unconsumed, consumed, or unknown. Methods are
then annotated as CallableWhenUnconsumed, and when an annotated method is
called while the value is in the 'consumed' state a warning is issued. A value
may be tested in the conditional statement of an if-statement; when this occurs
we know the state of the value in the different branches, and this information
is added to our analysis. The code is still highly experimental, and the names
of annotations or the algorithm may be subject to change.
llvm-svn: 188206
