blocks.cpp revision 461c9c1bc39ed8cbe8311f396f7ee3839e9fda53 
1// RUN: %clang_cc1 %s -fblocks -triple x86_64-apple-darwin -emit-llvm -o - | FileCheck %s
2
3namespace test0 {
4  // CHECK: define void @_ZN5test04testEi(
5  // CHECK: define internal void @__test_block_invoke_{{.*}}(
6  // CHECK: define internal void @__block_global_{{.*}}(
7  void test(int x) {
8    ^{ ^{ (void) x; }; };
9  }
10}
11
12extern void (^out)();
13
14namespace test1 {
15  // Capturing const objects doesn't require a local block.
16  // CHECK: define void @_ZN5test15test1Ev()
17  // CHECK:   store void ()* bitcast ({{.*}} @__block_literal_global{{.*}} to void ()*), void ()** @out
18  void test1() {
19    const int NumHorsemen = 4;
20    out = ^{ (void) NumHorsemen; };
21  }
22
23  // That applies to structs too...
24  // CHECK: define void @_ZN5test15test2Ev()
25  // CHECK:   store void ()* bitcast ({{.*}} @__block_literal_global{{.*}} to void ()*), void ()** @out
26  struct loc { double x, y; };
27  void test2() {
28    const loc target = { 5, 6 };
29    out = ^{ (void) target; };
30  }
31
32  // ...unless they have mutable fields...
33  // CHECK: define void @_ZN5test15test3Ev()
34  // CHECK:   [[BLOCK:%.*]] = alloca [[BLOCK_T:%.*]],
35  // CHECK:   [[T0:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to void ()*
36  // CHECK:   store void ()* [[T0]], void ()** @out
37  struct mut { mutable int x; };
38  void test3() {
39    const mut obj = { 5 };
40    out = ^{ (void) obj; };
41  }
42
43  // ...or non-trivial destructors...
44  // CHECK: define void @_ZN5test15test4Ev()
45  // CHECK:   [[OBJ:%.*]] = alloca
46  // CHECK:   [[BLOCK:%.*]] = alloca [[BLOCK_T:%.*]],
47  // CHECK:   [[T0:%.*]] = bitcast [[BLOCK_T]]* [[BLOCK]] to void ()*
48  // CHECK:   store void ()* [[T0]], void ()** @out
49  struct scope { int x; ~scope(); };
50  void test4() {
51    const scope obj = { 5 };
52    out = ^{ (void) obj; };
53  }
54
55  // ...or non-trivial copy constructors, but it's not clear how to do
56  // that and still have a constant initializer in '03.
57}
58