Issue dead store warnings for preincrements involved in a subexpression.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@53983 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/CheckDeadStores.cpp b/lib/Analysis/CheckDeadStores.cpp
index 433e611..4ab6680 100644
--- a/lib/Analysis/CheckDeadStores.cpp
+++ b/lib/Analysis/CheckDeadStores.cpp
@@ -152,12 +152,7 @@
else if (UnaryOperator* U = dyn_cast<UnaryOperator>(S)) {
if (!U->isIncrementOp())
return;
-
- // Don't flag dead stores when the result of a preincrement/predecrement
- // is used in an enclosing expression.
- if (U->isPrefix() && Parents.isSubExpr(U))
- return;
-
+
Expr *Ex = U->getSubExpr()->IgnoreParenCasts();
if (DeclRefExpr* DR = dyn_cast<DeclRefExpr>(Ex))