[analyzer] Add PostStmt callback for ArraySubscriptExpr

A patch by Jan Smets!

Differential Revision: https://reviews.llvm.org/D25009

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@283253 91177308-0d34-0410-b5e6-96231b3b80d8

lib/StaticAnalyzer/Checkers/AnalysisOrderChecker.cpp

@@ -25,7 +25,9 @@ using namespace ento;
 namespace {
 
 class AnalysisOrderChecker : public Checker< check::PreStmt<CastExpr>,
-                                             check::PostStmt<CastExpr>> {
+                                             check::PostStmt<CastExpr>,
+                                             check::PreStmt<ArraySubscriptExpr>,
+                                             check::PostStmt<ArraySubscriptExpr>> {
   bool isCallbackEnabled(CheckerContext &C, StringRef CallbackName) const {
     AnalyzerOptions &Opts = C.getAnalysisManager().getAnalyzerOptions();
     return Opts.getBooleanOption("*", false, this) ||
@@ -44,6 +46,16 @@ public:
       llvm::errs() << "PostStmt<CastExpr> (Kind : " << CE->getCastKindName()
                    << ")\n";
   }
+
+  void checkPreStmt(const ArraySubscriptExpr *SubExpr, CheckerContext &C) const {
+    if (isCallbackEnabled(C, "PreStmtArraySubscriptExpr"))
+      llvm::errs() << "PreStmt<ArraySubscriptExpr>\n";
+  }
+
+  void checkPostStmt(const ArraySubscriptExpr *SubExpr, CheckerContext &C) const {
+    if (isCallbackEnabled(C, "PostStmtArraySubscriptExpr"))
+      llvm::errs() << "PostStmt<ArraySubscriptExpr>\n";
+  }
 };
 }
 

lib/StaticAnalyzer/Core/ExprEngine.cpp

@@ -1968,24 +1968,26 @@ void ExprEngine::VisitLvalArraySubscriptExpr(const ArraySubscriptExpr *A,
   const Expr *Base = A->getBase()->IgnoreParens();
   const Expr *Idx  = A->getIdx()->IgnoreParens();
 
-  ExplodedNodeSet checkerPreStmt;
-  getCheckerManager().runCheckersForPreStmt(checkerPreStmt, Pred, A, *this);
+  ExplodedNodeSet CheckerPreStmt;
+  getCheckerManager().runCheckersForPreStmt(CheckerPreStmt, Pred, A, *this);
 
-  StmtNodeBuilder Bldr(checkerPreStmt, Dst, *currBldrCtx);
+  ExplodedNodeSet EvalSet;
+  StmtNodeBuilder Bldr(CheckerPreStmt, EvalSet, *currBldrCtx);
   assert(A->isGLValue() ||
           (!AMgr.getLangOpts().CPlusPlus &&
            A->getType().isCForbiddenLValueType()));
 
-  for (ExplodedNodeSet::iterator it = checkerPreStmt.begin(),
-                                 ei = checkerPreStmt.end(); it != ei; ++it) {
-    const LocationContext *LCtx = (*it)->getLocationContext();
-    ProgramStateRef state = (*it)->getState();
+  for (auto *Node : CheckerPreStmt) {
+    const LocationContext *LCtx = Node->getLocationContext();
+    ProgramStateRef state = Node->getState();
     SVal V = state->getLValue(A->getType(),
                               state->getSVal(Idx, LCtx),
                               state->getSVal(Base, LCtx));
-    Bldr.generateNode(A, *it, state->BindExpr(A, LCtx, V), nullptr,
+    Bldr.generateNode(A, Node, state->BindExpr(A, LCtx, V), nullptr,
                       ProgramPoint::PostLValueKind);
   }
+
+  getCheckerManager().runCheckersForPostStmt(Dst, EvalSet, A, *this);
 }
 
 /// VisitMemberExpr - Transfer function for member expressions.