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-rw-r--r--lib/ARCMigrate/Transforms.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/ARCMigrate/Transforms.cpp b/lib/ARCMigrate/Transforms.cpp
index c0adf16a11..170b7c8e15 100644
--- a/lib/ARCMigrate/Transforms.cpp
+++ b/lib/ARCMigrate/Transforms.cpp
@@ -74,6 +74,10 @@ bool trans::canApplyWeak(ASTContext &Ctx, QualType type,
if (T.isNull())
return false;
+ // iOS is always safe to use 'weak'.
+ if (Ctx.getTargetInfo().getTriple().getOS() == llvm::Triple::IOS)
+ AllowOnUnknownClass = true;
+
while (const PointerType *ptr = T->getAs<PointerType>())
T = ptr->getPointeeType();
if (const ObjCObjectPointerType *ObjT = T->getAs<ObjCObjectPointerType>()) {