Fix: <rdar://problem/7075531> static analyzer wrongly detects unused ivars used in blocks
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@78409 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/CheckObjCUnusedIVars.cpp b/lib/Analysis/CheckObjCUnusedIVars.cpp
index dbc90d6..3a69e00 100644
--- a/lib/Analysis/CheckObjCUnusedIVars.cpp
+++ b/lib/Analysis/CheckObjCUnusedIVars.cpp
@@ -30,14 +30,20 @@
if (!S)
return;
- if (const ObjCIvarRefExpr* Ex = dyn_cast<ObjCIvarRefExpr>(S)) {
- const ObjCIvarDecl* D = Ex->getDecl();
+ if (const ObjCIvarRefExpr *Ex = dyn_cast<ObjCIvarRefExpr>(S)) {
+ const ObjCIvarDecl *D = Ex->getDecl();
IvarUsageMap::iterator I = M.find(D);
if (I != M.end())
I->second = Used;
return;
}
+ // Blocks can reference an instance variable of a class.
+ if (const BlockExpr *BE = dyn_cast<BlockExpr>(S)) {
+ Scan(M, BE->getBody());
+ return;
+ }
+
for (Stmt::const_child_iterator I=S->child_begin(),E=S->child_end(); I!=E;++I)
Scan(M, *I);
}