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path: root/clang/lib/StaticAnalyzer/Checkers/DivZeroChecker.cpp
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* [analyzer] Make the entries in 'Environment' context-sensitive by making ↵Ted Kremenek2012-01-061-1/+1
| | | | | | | | | | | | | | | | | | entries map from (Stmt*,LocationContext*) pairs to SVals instead of Stmt* to SVals. This is needed to support basic IPA via inlining. Without this, we cannot tell if a Stmt* binding is part of the current analysis scope (StackFrameContext) or part of a parent context. This change introduces an uglification of the use of getSVal(), and thus takes two steps forward and one step back. There are also potential performance implications of enlarging the Environment. Both can be addressed going forward by refactoring the APIs and optimizing the internal representation of Environment. This patch mainly introduces the functionality upon when we want to build upon (and clean up). llvm-svn: 147688
* [analyzer] Remove redundant check from DivZeroCheckerAnna Zaks2011-11-081-1/+2
| | | | | | | | | | | | | | | | | | | | | | | Analysis by Ted: " if (stateZero && !stateNotZero) { is checking to see if: (A) "it is possible for the value to be zero" (stateZero) AND (B) "it is not possible for the value to be non-zero" (!stateNotZero) That said, the only way for both B to be true AND A to be false is if the path is completely infeasible by the time we reach the divide-by-zero check. For the most part (all cases?), such cases should automatically get pruned out at branches (i.e., an infeasible path gets dropped), which is the case in our tests. So the question is whether or not such an infeasible path might not get dropped earlier? I can't envision any right now. Indeed, the rest of the checker assumes that if the bug condition didn't fire then 'stateNotZero' is non-NULL: C.addTransition(stateNotZero); " llvm-svn: 144114
* [analyzer] Rename generateNode -> addTransition in CheckerContextAnna Zaks2011-10-261-1/+1
| | | | | | Also document addTransition methods. llvm-svn: 143059
* [analyzer] Simplify CheckerContextAnna Zaks2011-10-251-1/+1
| | | | | | | | | Remove dead members/parameters: ProgramState, respondsToCallback, autoTransition. Remove addTransition method since it's the same as generateNode. Maybe we should rename generateNode to genTransition (since a transition is always automatically generated)? llvm-svn: 142946
* Static Analyzer Diagnostics: Kill the addVisitorCreator(callbackTy, void*) ↵Anna Zaks2011-08-191-2/+2
| | | | | | | | | | | | API in favor of addVisitor(BugReporterVisitor*). 1) Create a header file to expose the predefined visitors. And move the parent(BugReporterVisitor) there as well. 2) Remove the registerXXXVisitor functions - the Visitor constructors/getters can be used now to create the object. One exception is registerVarDeclsLastStore(), which registers more then one visitor, so make it static member of FindLastStoreBRVisitor. 3) Modify all the checkers to use the new API. llvm-svn: 138126
* Remove EnhancedBugReport and RangedBugReport - pull all the extra ↵Anna Zaks2011-08-171-2/+2
| | | | | | functionality they provided into their parent BugReport. The only functional changes are: made getRanges() non const - it adds default range to Ranges if none are supplied, made getStmt() private, which was another FIXME. llvm-svn: 137894
* Rename GRState to ProgramState, and cleanup some code formatting along the way.Ted Kremenek2011-08-151-1/+1
| | | | llvm-svn: 137665
* [analyzer] Rename CheckerV2 -> Checker.Argyrios Kyrtzidis2011-03-011-2/+2
| | | | llvm-svn: 126726
* [analyzer] Migrate DivZeroChecker to CheckerV2.Argyrios Kyrtzidis2011-02-281-19/+14
| | | | llvm-svn: 126620
* Split 'include/clang/StaticAnalyzer' into ↵Ted Kremenek2011-02-101-2/+2
| | | | | | | | 'include/clang/StaticAnalyzer/Core' and 'include/clang/StaticAnalyzer/Checkers'. This layout matches lib/StaticAnalyzer, which corresponds to two StaticAnalyzer libraries. llvm-svn: 125251
* [analyzer] lib/StaticAnalyzer/Checkers/ExprEngineInternalChecks.h -> ↵Argyrios Kyrtzidis2011-02-081-1/+1
| | | | | | lib/StaticAnalyzer/Checkers/InternalChecks.h llvm-svn: 125121
* Chris Lattner has strong opinions about directoryTed Kremenek2010-12-231-0/+86
layout. :) Rename the 'EntoSA' directories to 'StaticAnalyzer'. Internally we will still use the 'ento' namespace for the analyzer engine (unless there are further sabre rattlings...). llvm-svn: 122514
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