Generate objc_read_weak for __weak objc loads.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59553 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGObjCMac.cpp b/lib/CodeGen/CGObjCMac.cpp
index 1591831..f3cf21e 100644
--- a/lib/CodeGen/CGObjCMac.cpp
+++ b/lib/CodeGen/CGObjCMac.cpp
@@ -454,7 +454,8 @@
const ObjCAtThrowStmt &S);
virtual void EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
const ObjCAtSynchronizedStmt &S);
-
+ virtual llvm::Value * EmitObjCWeakCall(CodeGen::CodeGenFunction &CGF,
+ llvm::Value *AddrWeakObj);
};
} // end anonymous namespace
@@ -1775,6 +1776,17 @@
EmitBranch(ExecuteTryExit ? E->FinallyBlock : E->FinallyNoExit);
}
+/// EmitObjCWeakCall - Code gen for loading value of a __weak
+/// object: objc_read_weak (id *src)
+///
+llvm::Value * CGObjCMac::EmitObjCWeakCall(CodeGen::CodeGenFunction &CGF,
+ llvm::Value *AddrWeakObj)
+{
+ llvm::Value *read_weak = CGF.Builder.CreateCall(ObjCTypes.GcReadWeakFn,
+ AddrWeakObj, "weakobj");
+ return read_weak;
+}
+
/// EmitSynchronizedStmt - Code gen for @synchronized(expr) stmt;
/// Effectively generating code for:
/// objc_sync_enter(expr);