Add the clang library to the repo (with some of my changes, too).

1 files changed, 523 insertions, 0 deletions

diff --git a/clang/test/CodeGenObjC/arc-blocks.m b/clang/test/CodeGenObjC/arc-blocks.m
new file mode 100644
index 0000000..06acf01
--- /dev/null
+++ b/clang/test/CodeGenObjC/arc-blocks.m
@@ -0,0 +1,523 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -O2 -disable-llvm-optzns -o - %s | FileCheck %s
+
+// This shouldn't crash.
+void test0(id (^maker)(void)) {
+  maker();
+}
+
+int (^test1(int x))(void) {
+  // CHECK:    define i32 ()* @test1(
+  // CHECK:      [[X:%.*]] = alloca i32,
+  // CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
+  // CHECK-NEXT: store i32 {{%.*}}, i32* [[X]]
+  // CHECK:      [[T0:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to i32 ()*
+  // CHECK-NEXT: [[T1:%.*]] = bitcast i32 ()* [[T0]] to i8*
+  // CHECK-NEXT: [[T2:%.*]] = call i8* @objc_retainBlock(i8* [[T1]]) nounwind
+  // CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to i32 ()*
+  // CHECK-NEXT: [[T4:%.*]] = bitcast i32 ()* [[T3]] to i8*
+  // CHECK-NEXT: [[T5:%.*]] = call i8* @objc_autoreleaseReturnValue(i8* [[T4]]) nounwind
+  // CHECK-NEXT: [[T6:%.*]] = bitcast i8* [[T5]] to i32 ()*
+  // CHECK-NEXT: ret i32 ()* [[T6]]
+  return ^{ return x; };
+}
+
+void test2(id x) {
+// CHECK:    define void @test2(
+// CHECK:      [[X:%.*]] = alloca i8*,
+// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
+// CHECK-NEXT: [[PARM:%.*]] = call i8* @objc_retain(i8* {{%.*}})
+// CHECK-NEXT: store i8* [[PARM]], i8** [[X]]
+// CHECK-NEXT: [[SLOTREL:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+// CHECK:      [[SLOT:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+// CHECK-NEXT: [[T0:%.*]] = load i8** [[X]],
+// CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retain(i8* [[T0]])
+// CHECK-NEXT: store i8* [[T1]], i8** [[SLOT]],
+// CHECK-NEXT: bitcast
+// CHECK-NEXT: call void @test2_helper(
+// CHECK-NEXT: [[T0:%.*]] = load i8** [[SLOTREL]]
+// CHECK-NEXT: call void @objc_release(i8* [[T0]]) nounwind, !clang.imprecise_release
+// CHECK-NEXT: [[T0:%.*]] = load i8** [[X]]
+// CHECK-NEXT: call void @objc_release(i8* [[T0]]) nounwind, !clang.imprecise_release
+// CHECK-NEXT: ret void
+  extern void test2_helper(id (^)(void));
+  test2_helper(^{ return x; });
+}
+
+void test3(void (^sink)(id*)) {
+  __strong id strong;
+  sink(&strong);
+
+  // CHECK:    define void @test3(
+  // CHECK:      [[SINK:%.*]] = alloca void (i8**)*
+  // CHECK-NEXT: [[STRONG:%.*]] = alloca i8*
+  // CHECK-NEXT: [[TEMP:%.*]] = alloca i8*
+  // CHECK-NEXT: bitcast void (i8**)* {{%.*}} to i8*
+  // CHECK-NEXT: call i8* @objc_retain(
+  // CHECK-NEXT: bitcast i8*
+  // CHECK-NEXT: store void (i8**)* {{%.*}}, void (i8**)** [[SINK]]
+  // CHECK-NEXT: store i8* null, i8** [[STRONG]]
+
+  // CHECK-NEXT: load void (i8**)** [[SINK]]
+  // CHECK-NEXT: bitcast
+  // CHECK-NEXT: getelementptr
+  // CHECK-NEXT: [[BLOCK:%.*]] = bitcast
+  // CHECK-NEXT: [[T0:%.*]] = load i8** [[STRONG]]
+  // CHECK-NEXT: store i8* [[T0]], i8** [[TEMP]]
+  // CHECK-NEXT: [[F0:%.*]] = load i8**
+  // CHECK-NEXT: [[F1:%.*]] = bitcast i8* [[F0]] to void (i8*, i8**)*
+  // CHECK-NEXT: call void [[F1]](i8* [[BLOCK]], i8** [[TEMP]])
+  // CHECK-NEXT: [[T0:%.*]] = load i8** [[TEMP]]
+  // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retain(i8* [[T0]])
+  // CHECK-NEXT: [[T2:%.*]] = load i8** [[STRONG]]
+  // CHECK-NEXT: store i8* [[T1]], i8** [[STRONG]]
+  // CHECK-NEXT: call void @objc_release(i8* [[T2]])
+
+  // CHECK-NEXT: [[T0:%.*]] = load i8** [[STRONG]]
+  // CHECK-NEXT: call void @objc_release(i8* [[T0]])
+
+  // CHECK-NEXT: load void (i8**)** [[SINK]]
+  // CHECK-NEXT: bitcast
+  // CHECK-NEXT: call void @objc_release
+  // CHECK-NEXT: ret void
+
+}
+
+void test4(void) {
+  id test4_source(void);
+  void test4_helper(void (^)(void));
+  __block id var = test4_source();
+  test4_helper(^{ var = 0; });
+
+  // CHECK:    define void @test4()
+  // CHECK:      [[VAR:%.*]] = alloca [[BYREF_T:%.*]],
+  // CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
+  // CHECK:      [[T0:%.*]] = getelementptr inbounds [[BYREF_T]]* [[VAR]], i32 0, i32 2
+  // 0x02000000 - has copy/dispose helpers
+  // CHECK-NEXT: store i32 33554432, i32* [[T0]]
+  // CHECK:      [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]]* [[VAR]], i32 0, i32 6
+  // CHECK-NEXT: [[T0:%.*]] = call i8* @test4_source()
+  // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T0]])
+  // CHECK-NEXT: store i8* [[T1]], i8** [[SLOT]]
+  // CHECK-NEXT: [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]]* [[VAR]], i32 0, i32 6
+  // 0x42000000 - has signature, copy/dispose helpers
+  // CHECK:      store i32 1107296256,
+  // CHECK:      [[T0:%.*]] = bitcast [[BYREF_T]]* [[VAR]] to i8*
+  // CHECK-NEXT: store i8* [[T0]], i8**
+  // CHECK:      call void @test4_helper(
+  // CHECK:      [[T0:%.*]] = bitcast [[BYREF_T]]* [[VAR]] to i8*
+  // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
+  // CHECK-NEXT: [[T0:%.*]] = load i8** [[SLOT]]
+  // CHECK-NEXT: call void @objc_release(i8* [[T0]])
+  // CHECK-NEXT: ret void
+
+  // CHECK:    define internal void @__Block_byref_object_copy_
+  // CHECK:      [[T0:%.*]] = getelementptr inbounds [[BYREF_T]]* {{%.*}}, i32 0, i32 6
+  // CHECK-NEXT: load i8**
+  // CHECK-NEXT: bitcast i8* {{%.*}} to [[BYREF_T]]*
+  // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF_T]]* {{%.*}}, i32 0, i32 6
+  // CHECK-NEXT: [[T2:%.*]] = load i8** [[T1]]
+  // CHECK-NEXT: store i8* [[T2]], i8** [[T0]]
+  // CHECK-NEXT: store i8* null, i8** [[T1]]
+
+  // CHECK:    define internal void @__Block_byref_object_dispose_
+  // CHECK:      [[T0:%.*]] = getelementptr inbounds [[BYREF_T]]* {{%.*}}, i32 0, i32 6
+  // CHECK-NEXT: [[T1:%.*]] = load i8** [[T0]]
+  // CHECK-NEXT: call void @objc_release(i8* [[T1]])
+
+  // CHECK:    define internal void @__test4_block_invoke_
+  // CHECK:      [[SLOT:%.*]] = getelementptr inbounds {{.*}}, i32 0, i32 6
+  // CHECK-NEXT: [[T0:%.*]] = load i8** [[SLOT]], align 8
+  // CHECK-NEXT: store i8* null, i8** [[SLOT]],
+  // CHECK-NEXT: call void @objc_release(i8* [[T0]])
+  // CHECK-NEXT: ret void
+
+  // CHECK:    define internal void @__copy_helper_block_
+  // CHECK:      call void @_Block_object_assign(i8* {{%.*}}, i8* {{%.*}}, i32 8)
+
+  // CHECK:    define internal void @__destroy_helper_block_
+  // CHECK:      call void @_Block_object_dispose(i8* {{%.*}}, i32 8)
+}
+
+void test5(void) {
+  extern id test5_source(void);
+  void test5_helper(void (^)(void));
+  __unsafe_unretained id var = test5_source();
+  test5_helper(^{ (void) var; });
+
+  // CHECK:    define void @test5()
+  // CHECK:      [[VAR:%.*]] = alloca i8*
+  // CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
+  // CHECK: [[T0:%.*]] = call i8* @test5_source()
+  // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T0]])
+  // CHECK-NEXT: store i8* [[T1]], i8** [[VAR]],
+  // CHECK-NEXT: call void @objc_release(i8* [[T1]])
+  // 0x40000000 - has signature but no copy/dispose
+  // CHECK:      store i32 1073741824, i32*
+  // CHECK:      [[CAPTURE:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+  // CHECK-NEXT: [[T0:%.*]] = load i8** [[VAR]]
+  // CHECK-NEXT: store i8* [[T0]], i8** [[CAPTURE]]
+  // CHECK-NEXT: [[T0:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to
+  // CHECK: call void @test5_helper
+  // CHECK-NEXT: ret void
+}
+
+void test6(void) {
+  id test6_source(void);
+  void test6_helper(void (^)(void));
+  __block __weak id var = test6_source();
+  test6_helper(^{ var = 0; });
+
+  // CHECK:    define void @test6()
+  // CHECK:      [[VAR:%.*]] = alloca [[BYREF_T:%.*]],
+  // CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
+  // CHECK:      [[T0:%.*]] = getelementptr inbounds [[BYREF_T]]* [[VAR]], i32 0, i32 2
+  // 0x02000000 - has copy/dispose helpers
+  // CHECK-NEXT: store i32 33554432, i32* [[T0]]
+  // CHECK:      [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]]* [[VAR]], i32 0, i32 6
+  // CHECK-NEXT: [[T0:%.*]] = call i8* @test6_source()
+  // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T0]])
+  // CHECK-NEXT: call i8* @objc_initWeak(i8** [[SLOT]], i8* [[T1]])
+  // CHECK-NEXT: call void @objc_release(i8* [[T1]])
+  // CHECK-NEXT: [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]]* [[VAR]], i32 0, i32 6
+  // 0x42000000 - has signature, copy/dispose helpers
+  // CHECK:      store i32 1107296256,
+  // CHECK:      [[T0:%.*]] = bitcast [[BYREF_T]]* [[VAR]] to i8*
+  // CHECK-NEXT: store i8* [[T0]], i8**
+  // CHECK:      call void @test6_helper(
+  // CHECK:      [[T0:%.*]] = bitcast [[BYREF_T]]* [[VAR]] to i8*
+  // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
+  // CHECK-NEXT: call void @objc_destroyWeak(i8** [[SLOT]])
+  // CHECK-NEXT: ret void
+
+  // CHECK:    define internal void @__Block_byref_object_copy_
+  // CHECK:      [[T0:%.*]] = getelementptr inbounds [[BYREF_T]]* {{%.*}}, i32 0, i32 6
+  // CHECK-NEXT: load i8**
+  // CHECK-NEXT: bitcast i8* {{%.*}} to [[BYREF_T]]*
+  // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF_T]]* {{%.*}}, i32 0, i32 6
+  // CHECK-NEXT: call void @objc_moveWeak(i8** [[T0]], i8** [[T1]])
+
+  // CHECK:    define internal void @__Block_byref_object_dispose_
+  // CHECK:      [[T0:%.*]] = getelementptr inbounds [[BYREF_T]]* {{%.*}}, i32 0, i32 6
+  // CHECK-NEXT: call void @objc_destroyWeak(i8** [[T0]])
+
+  // CHECK:    define internal void @__test6_block_invoke_
+  // CHECK:      [[SLOT:%.*]] = getelementptr inbounds {{.*}}, i32 0, i32 6
+  // CHECK-NEXT: call i8* @objc_storeWeak(i8** [[SLOT]], i8* null)
+  // CHECK-NEXT: ret void
+
+  // CHECK:    define internal void @__copy_helper_block_
+  // 0x8 - FIELD_IS_BYREF (no FIELD_IS_WEAK because clang in control)
+  // CHECK:      call void @_Block_object_assign(i8* {{%.*}}, i8* {{%.*}}, i32 8)
+
+  // CHECK:    define internal void @__destroy_helper_block_
+  // 0x8 - FIELD_IS_BYREF (no FIELD_IS_WEAK because clang in control)
+  // CHECK:      call void @_Block_object_dispose(i8* {{%.*}}, i32 8)
+}
+
+void test7(void) {
+  id test7_source(void);
+  void test7_helper(void (^)(void));
+  void test7_consume(id);
+  __weak id var = test7_source();
+  test7_helper(^{ test7_consume(var); });
+
+  // CHECK:    define void @test7()
+  // CHECK:      [[VAR:%.*]] = alloca i8*,
+  // CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
+  // CHECK:      [[T0:%.*]] = call i8* @test7_source()
+  // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T0]])
+  // CHECK-NEXT: call i8* @objc_initWeak(i8** [[VAR]], i8* [[T1]])
+  // CHECK-NEXT: call void @objc_release(i8* [[T1]])
+  // 0x42000000 - has signature, copy/dispose helpers
+  // CHECK:      store i32 1107296256,
+  // CHECK:      [[SLOT:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+  // CHECK-NEXT: [[T0:%.*]] = call i8* @objc_loadWeak(i8** [[VAR]])
+  // CHECK-NEXT: call i8* @objc_initWeak(i8** [[SLOT]], i8* [[T0]])
+  // CHECK:      call void @test7_helper(
+  // CHECK-NEXT: call void @objc_destroyWeak(i8** {{%.*}})
+  // CHECK-NEXT: call void @objc_destroyWeak(i8** [[VAR]])
+  // CHECK-NEXT: ret void
+
+  // CHECK:    define internal void @__test7_block_invoke_
+  // CHECK:      [[SLOT:%.*]] = getelementptr inbounds [[BLOCK_T]]* {{%.*}}, i32 0, i32 5
+  // CHECK-NEXT: [[T0:%.*]] = call i8* @objc_loadWeak(i8** [[SLOT]])
+  // CHECK-NEXT: call void @test7_consume(i8* [[T0]])
+  // CHECK-NEXT: ret void
+
+  // CHECK:    define internal void @__copy_helper_block_
+  // CHECK:      getelementptr
+  // CHECK-NEXT: getelementptr
+  // CHECK-NEXT: call void @objc_copyWeak(
+
+  // CHECK:    define internal void @__destroy_helper_block_
+  // CHECK:      getelementptr
+  // CHECK-NEXT: call void @objc_destroyWeak(
+}
+
+@interface Test8 @end
+@implementation Test8
+- (void) test {
+// CHECK:    define internal void @"\01-[Test8 test]"
+// CHECK:      [[SELF:%.*]] = alloca [[TEST8:%.*]]*,
+// CHECK-NEXT: alloca i8*
+// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
+// CHECK: store
+// CHECK-NEXT: store
+// CHECK:      [[D0:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+// CHECK:      [[T0:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+// CHECK-NEXT: [[T1:%.*]] = load [[TEST8]]** [[SELF]],
+// CHECK-NEXT: [[T2:%.*]] = bitcast [[TEST8]]* [[T1]] to i8*
+// CHECK-NEXT: [[T3:%.*]] = call i8* @objc_retain(i8* [[T2]])
+// CHECK-NEXT: [[T4:%.*]] = bitcast i8* [[T3]] to [[TEST8]]*
+// CHECK-NEXT: store [[TEST8]]* [[T4]], [[TEST8]]** [[T0]]
+// CHECK-NEXT: bitcast [[BLOCK_T]]* [[BLOCK]] to
+// CHECK: call void @test8_helper(
+// CHECK-NEXT: [[T1:%.*]] = load [[TEST8]]** [[D0]]
+// CHECK-NEXT: [[T2:%.*]] = bitcast [[TEST8]]* [[T1]] to i8*
+// CHECK-NEXT: call void @objc_release(i8* [[T2]])
+// CHECK-NEXT: ret void
+
+  extern void test8_helper(void (^)(void));
+  test8_helper(^{ (void) self; });
+}
+@end
+
+id test9(void) {
+  typedef id __attribute__((ns_returns_retained)) blocktype(void);
+  extern void test9_consume_block(blocktype^);
+  return ^blocktype {
+      extern id test9_produce(void);
+      return test9_produce();
+  }();
+
+// CHECK:    define i8* @test9(
+// CHECK:      load i8** getelementptr
+// CHECK-NEXT: bitcast i8*
+// CHECK-NEXT: call i8* 
+// CHECK-NEXT: call i8* @objc_autoreleaseReturnValue
+// CHECK-NEXT: ret i8*
+
+// CHECK:      call i8* @test9_produce()
+// CHECK-NEXT: call i8* @objc_retain
+// CHECK-NEXT: ret i8*
+}
+
+// rdar://problem/9814099
+// Test that we correctly initialize __block variables
+// when the initialization captures the variable.
+void test10a(void) {
+  __block void (^block)(void) = ^{ block(); };
+  // CHECK:    define void @test10a()
+  // CHECK:      [[BYREF:%.*]] = alloca [[BYREF_T:%.*]],
+
+  // Zero-initialization before running the initializer.
+  // CHECK:      [[T0:%.*]] = getelementptr inbounds [[BYREF_T]]* [[BYREF]], i32 0, i32 6
+  // CHECK-NEXT: store void ()* null, void ()** [[T0]], align 8
+
+  // Run the initializer as an assignment.
+  // CHECK:      [[T0:%.*]] = bitcast void ()* {{%.*}} to i8*
+  // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retainBlock(i8* [[T0]])
+  // CHECK-NEXT: [[T2:%.*]] = bitcast i8* [[T1]] to void ()*
+  // CHECK-NEXT: [[T3:%.*]] = getelementptr inbounds [[BYREF_T]]* [[BYREF]], i32 0, i32 1
+  // CHECK-NEXT: [[T4:%.*]] = load [[BYREF_T]]** [[T3]]
+  // CHECK-NEXT: [[T5:%.*]] = getelementptr inbounds [[BYREF_T]]* [[T4]], i32 0, i32 6
+  // CHECK-NEXT: [[T6:%.*]] = load void ()** [[T5]], align 8
+  // CHECK-NEXT: store void ()* {{%.*}}, void ()** [[T5]], align 8
+  // CHECK-NEXT: [[T7:%.*]] = bitcast void ()* [[T6]] to i8*
+  // CHECK-NEXT: call void @objc_release(i8* [[T7]])
+
+  // Destroy at end of function.
+  // CHECK-NEXT: [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]]* [[BYREF]], i32 0, i32 6
+  // CHECK-NEXT: [[T0:%.*]] = bitcast [[BYREF_T]]* [[BYREF]] to i8*
+  // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
+  // CHECK-NEXT: [[T1:%.*]] = load void ()** [[SLOT]]
+  // CHECK-NEXT: [[T2:%.*]] = bitcast void ()* [[T1]] to i8*
+  // CHECK-NEXT: call void @objc_release(i8* [[T2]])
+  // CHECK-NEXT: ret void
+}
+
+// <rdar://problem/10402698>: do this copy and dispose with
+// objc_retainBlock/release instead of _Block_object_assign/destroy.
+// We can also use _Block_object_assign/destroy with
+// BLOCK_FIELD_IS_BLOCK as long as we don't pass BLOCK_BYREF_CALLER.
+
+// CHECK: define internal void @__Block_byref_object_copy
+// CHECK:      [[D0:%.*]] = load i8** {{%.*}}
+// CHECK-NEXT: [[D1:%.*]] = bitcast i8* [[D0]] to [[BYREF_T]]*
+// CHECK-NEXT: [[D2:%.*]] = getelementptr inbounds [[BYREF_T]]* [[D1]], i32 0, i32 6
+// CHECK-NEXT: [[S0:%.*]] = load i8** {{%.*}}
+// CHECK-NEXT: [[S1:%.*]] = bitcast i8* [[S0]] to [[BYREF_T]]*
+// CHECK-NEXT: [[S2:%.*]] = getelementptr inbounds [[BYREF_T]]* [[S1]], i32 0, i32 6
+// CHECK-NEXT: [[T0:%.*]] = load void ()** [[S2]], align 8
+// CHECK-NEXT: [[T1:%.*]] = bitcast void ()* [[T0]] to i8*
+// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_retainBlock(i8* [[T1]])
+// CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to void ()*
+// CHECK-NEXT: store void ()* [[T3]], void ()** [[D2]], align 8
+// CHECK-NEXT: ret void
+
+// CHECK: define internal void @__Block_byref_object_dispose
+// CHECK:      [[T0:%.*]] = load i8** {{%.*}}
+// CHECK-NEXT: [[T1:%.*]] = bitcast i8* [[T0]] to [[BYREF_T]]*
+// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds [[BYREF_T]]* [[T1]], i32 0, i32 6
+// CHECK-NEXT: [[T3:%.*]] = load void ()** [[T2]], align 8
+// CHECK-NEXT: [[T4:%.*]] = bitcast void ()* [[T3]] to i8*
+// CHECK-NEXT: call void @objc_release(i8* [[T4]])
+// CHECK-NEXT: ret void
+
+// Test that we correctly assign to __block variables when the
+// assignment captures the variable.
+void test10b(void) {
+  __block void (^block)(void);
+  block = ^{ block(); };
+
+  // CHECK:    define void @test10b()
+  // CHECK:      [[BYREF:%.*]] = alloca [[BYREF_T:%.*]],
+
+  // Zero-initialize.
+  // CHECK:      [[T0:%.*]] = getelementptr inbounds [[BYREF_T]]* [[BYREF]], i32 0, i32 6
+  // CHECK-NEXT: store void ()* null, void ()** [[T0]], align 8
+
+  // CHECK-NEXT: [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]]* [[BYREF]], i32 0, i32 6
+
+  // The assignment.
+  // CHECK:      [[T0:%.*]] = bitcast void ()* {{%.*}} to i8*
+  // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retainBlock(i8* [[T0]])
+  // CHECK-NEXT: [[T2:%.*]] = bitcast i8* [[T1]] to void ()*
+  // CHECK-NEXT: [[T3:%.*]] = getelementptr inbounds [[BYREF_T]]* [[BYREF]], i32 0, i32 1
+  // CHECK-NEXT: [[T4:%.*]] = load [[BYREF_T]]** [[T3]]
+  // CHECK-NEXT: [[T5:%.*]] = getelementptr inbounds [[BYREF_T]]* [[T4]], i32 0, i32 6
+  // CHECK-NEXT: [[T6:%.*]] = load void ()** [[T5]], align 8
+  // CHECK-NEXT: store void ()* {{%.*}}, void ()** [[T5]], align 8
+  // CHECK-NEXT: [[T7:%.*]] = bitcast void ()* [[T6]] to i8*
+  // CHECK-NEXT: call void @objc_release(i8* [[T7]])
+
+  // Destroy at end of function.
+  // CHECK-NEXT: [[T0:%.*]] = bitcast [[BYREF_T]]* [[BYREF]] to i8*
+  // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
+  // CHECK-NEXT: [[T1:%.*]] = load void ()** [[SLOT]]
+  // CHECK-NEXT: [[T2:%.*]] = bitcast void ()* [[T1]] to i8*
+  // CHECK-NEXT: call void @objc_release(i8* [[T2]])
+  // CHECK-NEXT: ret void
+}
+
+// rdar://problem/10088932
+void test11_helper(id);
+void test11a(void) {
+  int x;
+  test11_helper(^{ (void) x; });
+
+  // CHECK:    define void @test11a()
+  // CHECK:      [[X:%.*]] = alloca i32, align 4
+  // CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]], align 8
+  // CHECK:      [[T0:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to void ()*
+  // CHECK-NEXT: [[T1:%.*]] = bitcast void ()* [[T0]] to i8*
+  // CHECK-NEXT: [[T2:%.*]] = call i8* @objc_retainBlock(i8* [[T1]])
+  // CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to void ()*
+  // CHECK-NEXT: [[T4:%.*]] = bitcast void ()* [[T3]] to i8*
+  // CHECK-NEXT: call void @test11_helper(i8* [[T4]])
+  // CHECK-NEXT: [[T5:%.*]] = bitcast void ()* [[T3]] to i8*
+  // CHECK-NEXT: call void @objc_release(i8* [[T5]])
+  // CHECK-NEXT: ret void
+}
+void test11b(void) {
+  int x;
+  id b = ^{ (void) x; };
+
+  // CHECK:    define void @test11b()
+  // CHECK:      [[X:%.*]] = alloca i32, align 4
+  // CHECK-NEXT: [[B:%.*]] = alloca i8*, align 8
+  // CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]], align 8
+  // CHECK:      [[T0:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to void ()*
+  // CHECK-NEXT: [[T1:%.*]] = bitcast void ()* [[T0]] to i8*
+  // CHECK-NEXT: [[T2:%.*]] = call i8* @objc_retainBlock(i8* [[T1]])
+  // CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to void ()*
+  // CHECK-NEXT: [[T4:%.*]] = bitcast void ()* [[T3]] to i8*
+  // CHECK-NEXT: store i8* [[T4]], i8** [[B]], align 8
+  // CHECK-NEXT: [[T5:%.*]] = load i8** [[B]]
+  // CHECK-NEXT: call void @objc_release(i8* [[T5]])
+  // CHECK-NEXT: ret void
+}
+
+// rdar://problem/9979150
+@interface Test12
+@property (strong) void(^ablock)(void);
+@property (nonatomic, strong) void(^nblock)(void);
+@end
+@implementation Test12
+@synthesize ablock, nblock;
+// CHECK:    define internal void ()* @"\01-[Test12 ablock]"(
+// CHECK:    call i8* @objc_getProperty(i8* {{%.*}}, i8* {{%.*}}, i64 {{%.*}}, i1 zeroext true)
+
+// CHECK:    define internal void @"\01-[Test12 setAblock:]"(
+// CHECK:    call void @objc_setProperty(i8* {{%.*}}, i8* {{%.*}}, i64 {{%.*}}, i8* {{%.*}}, i1 zeroext true, i1 zeroext true)
+
+// CHECK:    define internal void ()* @"\01-[Test12 nblock]"(
+// CHECK:    call i8* @objc_getProperty(i8* {{%.*}}, i8* {{%.*}}, i64 {{%.*}}, i1 zeroext false)
+
+// CHECK:    define internal void @"\01-[Test12 setNblock:]"(
+// CHECK:    call void @objc_setProperty(i8* {{%.*}}, i8* {{%.*}}, i64 {{%.*}}, i8* {{%.*}}, i1 zeroext false, i1 zeroext true)
+@end
+
+// rdar://problem/10131784
+void test13(id x) {
+  extern void test13_helper(id);
+  extern void test13_use(void(^)(void));
+
+  void (^b)(void) = (x ? ^{test13_helper(x);} : 0);
+  test13_use(b);
+
+  // CHECK:    define void @test13(
+  // CHECK:      [[X:%.*]] = alloca i8*, align 8
+  // CHECK-NEXT: [[B:%.*]] = alloca void ()*, align 8
+  // CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:.*]], align 8
+  // CHECK-NEXT: [[CLEANUP_ACTIVE:%.*]] = alloca i1
+  // CHECK-NEXT: [[T0:%.*]] = call i8* @objc_retain(i8* {{%.*}})
+  // CHECK-NEXT: store i8* [[T0]], i8** [[X]], align 8
+  // CHECK-NEXT: [[CLEANUP_ADDR:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+  // CHECK-NEXT: [[T0:%.*]] = load i8** [[X]], align 8
+  // CHECK-NEXT: [[T1:%.*]] = icmp ne i8* [[T0]], null
+  // CHECK-NEXT: store i1 false, i1* [[CLEANUP_ACTIVE]]
+  // CHECK-NEXT: br i1 [[T1]],
+
+  // CHECK-NOT:  br
+  // CHECK:      [[CAPTURE:%.*]] = getelementptr inbounds [[BLOCK_T]]* [[BLOCK]], i32 0, i32 5
+  // CHECK-NEXT: [[T0:%.*]] = load i8** [[X]], align 8
+  // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retain(i8* [[T0]])
+  // CHECK-NEXT: store i8* [[T1]], i8** [[CAPTURE]], align 8
+  // CHECK-NEXT: store i1 true, i1* [[CLEANUP_ACTIVE]]
+  // CHECK-NEXT: bitcast [[BLOCK_T]]* [[BLOCK]] to void ()*
+  // CHECK-NEXT: br label
+  // CHECK:      br label
+  // CHECK:      [[T0:%.*]] = phi void ()*
+  // CHECK-NEXT: [[T1:%.*]] = bitcast void ()* [[T0]] to i8*
+  // CHECK-NEXT: [[T2:%.*]] = call i8* @objc_retainBlock(i8* [[T1]])
+  // CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to void ()*
+  // CHECK-NEXT: store void ()* [[T3]], void ()** [[B]], align 8
+  // CHECK-NEXT: [[T0:%.*]] = load void ()** [[B]], align 8
+  // CHECK-NEXT: call void @test13_use(void ()* [[T0]])
+  // CHECK-NEXT: [[T0:%.*]] = load void ()** [[B]]
+  // CHECK-NEXT: [[T1:%.*]] = bitcast void ()* [[T0]] to i8*
+  // CHECK-NEXT: call void @objc_release(i8* [[T1]])
+
+  // CHECK-NEXT: [[T0:%.*]] = load i1* [[CLEANUP_ACTIVE]]
+  // CHECK-NEXT: br i1 [[T0]]
+  // CHECK:      [[T0:%.*]] = load i8** [[CLEANUP_ADDR]]
+  // CHECK-NEXT: call void @objc_release(i8* [[T0]])
+  // CHECK-NEXT: br label
+
+  // CHECK:      [[T0:%.*]] = load i8** [[X]]
+  // CHECK-NEXT: call void @objc_release(i8* [[T0]])
+  // CHECK-NEXT: ret void
+}
+
+// <rdar://problem/10907510>
+void test14() {
+  void (^const x[1])(void) = { ^{} };
+}
+
+// rdar://11149025
+// Don't make invalid ASTs and crash.
+void test15_helper(void (^block)(void), int x);
+void test15(int a) {
+  test15_helper(^{ (void) a; }, ({ a; }));
+}