[analyzer] Do not report uninitialized value warnings inside swap functions.
This silences warnings that could occur when one is swapping partially initialized structs. We suppress
not only the assignments of uninitialized members, but any values inside swap because swap could
potentially be used as a subroutine to swap class members.
This silences a warning from std::try::function::swap() on partially initialized objects.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184256 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Checkers/UndefinedAssignmentChecker.cpp b/lib/StaticAnalyzer/Checkers/UndefinedAssignmentChecker.cpp
index e04f49c..016e3c8 100644
--- a/lib/StaticAnalyzer/Checkers/UndefinedAssignmentChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/UndefinedAssignmentChecker.cpp
@@ -38,6 +38,14 @@
if (!val.isUndef())
return;
+ // Do not report assignments of uninitialized values inside swap functions.
+ // This should allow to swap partially uninitialized structs
+ // (radar://14129997)
+ if (const FunctionDecl *EnclosingFunctionDecl =
+ dyn_cast<FunctionDecl>(C.getStackFrame()->getDecl()))
+ if (C.getCalleeName(EnclosingFunctionDecl) == "swap")
+ return;
+
ExplodedNode *N = C.generateSink();
if (!N)