Warn when an expression result in a LabelStmt is unused.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@114314 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 4c6822c..b31ec23 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -1225,9 +1225,13 @@
// however, if the result of the stmt expr is dead, we don't want to emit a
// warning.
const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
- if (!CS->body_empty())
+ if (!CS->body_empty()) {
if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
return E->isUnusedResultAWarning(Loc, R1, R2, Ctx);
+ if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
+ if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
+ return E->isUnusedResultAWarning(Loc, R1, R2, Ctx);
+ }
if (getType()->isVoidType())
return false;