-Warc-repeated-use-of-weak: check ivars and variables as well.
Like properties, loading from a weak ivar twice in the same function can
give you inconsistent results if the object is deallocated between the
two loads. It is safer to assign to a strong local variable and use that.
Second half of <rdar://problem/12280249>.
llvm-svn: 164855
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 7951a71..ebb6cd1 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -5639,9 +5639,19 @@
if (LHSType.isNull())
LHSType = LHS->getType();
+
+ Qualifiers::ObjCLifetime LT = LHSType.getObjCLifetime();
+
+ if (LT == Qualifiers::OCL_Weak) {
+ DiagnosticsEngine::Level Level =
+ Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak, Loc);
+ if (Level != DiagnosticsEngine::Ignored)
+ getCurFunction()->markSafeWeakUse(LHS);
+ }
+
if (checkUnsafeAssigns(Loc, LHSType, RHS))
return;
- Qualifiers::ObjCLifetime LT = LHSType.getObjCLifetime();
+
// FIXME. Check for other life times.
if (LT != Qualifiers::OCL_None)
return;