From 222e2a7620e6520ffaf4fc4e69d79c18da31542e Mon Sep 17 00:00:00 2001
From: "Zancanaro; Carlo" <czan8762@plang3.cs.usyd.edu.au>
Date: Mon, 24 Sep 2012 09:58:17 +1000
Subject: Add the clang library to the repo (with some of my changes, too).

---
 clang/test/CodeGenObjCXX/arc-references.mm | 84 ++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 clang/test/CodeGenObjCXX/arc-references.mm

(limited to 'clang/test/CodeGenObjCXX/arc-references.mm')

diff --git a/clang/test/CodeGenObjCXX/arc-references.mm b/clang/test/CodeGenObjCXX/arc-references.mm
new file mode 100644
index 0000000..954c02a
--- /dev/null
+++ b/clang/test/CodeGenObjCXX/arc-references.mm
@@ -0,0 +1,84 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fobjc-runtime-has-weak -fblocks -fobjc-arc -O2 -disable-llvm-optzns -o - %s | FileCheck %s
+
+@interface A
+@end
+
+id getObject();
+void callee();
+
+// Lifetime extension for binding a reference to an rvalue
+// CHECK: define void @_Z5test0v()
+void test0() {
+  // CHECK: call i8* @_Z9getObjectv
+  // CHECK-NEXT:: call i8* @objc_retainAutoreleasedReturnValue
+  const __strong id &ref1 = getObject();
+  // CHECK: call void @_Z6calleev
+  callee();
+  // CHECK: call i8* @_Z9getObjectv
+  // CHECK-NEXT: call i8* @objc_retainAutoreleasedReturnValue
+  // CHECK-NEXT: call i8* @objc_autorelease
+  const __autoreleasing id &ref2 = getObject();
+  // CHECK: call void @_Z6calleev
+  callee();
+  // CHECK: call void @objc_release
+  // CHECK-NEXT: ret
+}
+
+// No lifetime extension when we're binding a reference to an lvalue.
+// CHECK: define void @_Z5test1RU8__strongP11objc_objectRU6__weakS0_
+void test1(__strong id &x, __weak id &y) {
+  // CHECK-NOT: release
+  const __strong id &ref1 = x;
+  const __autoreleasing id &ref2 = x;
+  const __weak id &ref3 = y;
+  // CHECK: ret void
+}
+
+typedef __strong id strong_id;
+
+//CHECK: define void @_Z5test3v
+void test3() {
+  // CHECK: call i8* @objc_initWeak
+  // CHECK-NEXT: store i8**
+  const __weak id &ref = strong_id();
+  // CHECK-NEXT: call void @_Z6calleev()
+  callee();
+  // CHECK-NEXT: call void @objc_destroyWeak
+  // CHECK-NEXT: ret void
+}
+
+// CHECK: define void @_Z5test4RU8__strongP11objc_object
+void test4(__strong id &x) {
+  // CHECK: call i8* @objc_retain
+  __strong A* const &ar = x;
+  // CHECK: store i32 17, i32*
+  int i = 17;
+  // CHECK: call void @objc_release(
+  // CHECK: ret void
+}
+
+void sink(__strong A* &&);
+
+// CHECK: define void @_Z5test5RU8__strongP11objc_object
+void test5(__strong id &x) {
+  // CHECK:      [[REFTMP:%.*]] = alloca {{%.*}}*, align 8
+  // CHECK:      [[OBJ_ID:%.*]] = call i8* @objc_retain(
+  // CHECK-NEXT: [[OBJ_A:%.*]] = bitcast i8* [[OBJ_ID]] to [[A:%[a-zA-Z0-9]+]]*
+  // CHECK-NEXT: store [[A]]* [[OBJ_A]], [[A]]** [[REFTMP:%[a-zA-Z0-9]+]]
+  // CHECK-NEXT: call void @_Z4sinkOU8__strongP1A
+  sink(x);  
+  // CHECK-NEXT: [[OBJ_A:%[a-zA-Z0-9]+]] = load [[A]]** [[REFTMP]]
+  // CHECK-NEXT: [[OBJ_ID:%[a-zA-Z0-9]+]] = bitcast [[A]]* [[OBJ_A]] to i8*
+  // CHECK-NEXT: call void @objc_release
+  // CHECK-NEXT: store i32 17, i32
+  int i = 17;
+  // CHECK-NEXT: ret void
+}
+
+// CHECK: define internal void @__cxx_global_var_init(
+// CHECK: call i8* @_Z9getObjectv
+// CHECK-NEXT: call i8* @objc_retainAutoreleasedReturnValue
+const __strong id &global_ref = getObject();
+
+// Note: we intentionally don't release the object.
+
-- 
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