SimpleConstraintManager doesn't reason about bitwise-constraints on symbolic
values. Indicating this in 'canReasonAbout' allows GRExprEngine to recover
path-sensitivity in some cases.
llvm-svn: 66628
diff --git a/clang/lib/Analysis/SimpleConstraintManager.cpp b/clang/lib/Analysis/SimpleConstraintManager.cpp
index 82cc0bb..a4d59be 100644
--- a/clang/lib/Analysis/SimpleConstraintManager.cpp
+++ b/clang/lib/Analysis/SimpleConstraintManager.cpp
@@ -21,6 +21,19 @@
SimpleConstraintManager::~SimpleConstraintManager() {}
bool SimpleConstraintManager::canReasonAbout(SVal X) const {
+ if (nonloc::SymIntConstraintVal *Y = dyn_cast<nonloc::SymIntConstraintVal>(&X)) {
+ const SymIntConstraint& C = Y->getConstraint();
+ switch (C.getOpcode()) {
+ // We don't reason yet about bitwise-constraints on symbolic values.
+ case BinaryOperator::And:
+ case BinaryOperator::Or:
+ case BinaryOperator::Xor:
+ return false;
+ default:
+ return true;
+ }
+ }
+
return true;
}