Added a path-sensitive idempotent operation checker (-analyzer-idempotent-operation). Finds idempotent and/or tautological operations in a path sensitive context, flagging operations that have no effect or a predictable effect.
Example:
{
int a = 1;
int b = 5;
int c = b / a; // a is 1 on all paths
}
- New IdempotentOperationChecker class
- Moved recursive Stmt functions in r107675 to IdempotentOperationChecker
- Minor refactoring of SVal to allow checking for any integer
- Added command line option for check
- Added basic test cases
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@107706 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Checker/GRExprEngineExperimentalChecks.h b/lib/Checker/GRExprEngineExperimentalChecks.h
index fb867a9..24c7032 100644
--- a/lib/Checker/GRExprEngineExperimentalChecks.h
+++ b/lib/Checker/GRExprEngineExperimentalChecks.h
@@ -22,6 +22,7 @@
void RegisterPthreadLockChecker(GRExprEngine &Eng);
void RegisterMallocChecker(GRExprEngine &Eng);
void RegisterStreamChecker(GRExprEngine &Eng);
+void RegisterIdempotentOperationChecker(GRExprEngine &Eng);
} // end clang namespace
#endif