// RUN: %clang_cc1 %s -fblocks -triple x86_64-apple-darwin -emit-llvm -o - | FileCheck %s
// CHECK: @[[BLOCK_DESCRIPTOR22:.*]] = internal constant { i64, i64, ptr, ptr, ptr, ptr } { i64 0, i64 36, ptr @__copy_helper_block_8_32c22_ZTSN12_GLOBAL__N_11BE, ptr @__destroy_helper_block_8_32c22_ZTSN12_GLOBAL__N_11BE, ptr @{{.*}}, ptr null }, align 8
namespace test0 {
// CHECK-LABEL: define{{.*}} void @_ZN5test04testEi(
// CHECK: define internal void @___ZN5test04testEi_block_invoke{{.*}}(
// CHECK: define internal void @___ZN5test04testEi_block_invoke_2{{.*}}(
void test(int x) {
^{ ^{ (void) x; }; };
}
}
extern void (^out)();
namespace test1 {
// Capturing const objects doesn't require a local block.
// CHECK-LABEL: define{{.*}} void @_ZN5test15test1Ev()
// CHECK: store ptr @__block_literal_global{{.*}}, ptr @out
void test1() {
const int NumHorsemen = 4;
out = ^{ (void) NumHorsemen; };
}
// That applies to structs too...
// CHECK-LABEL: define{{.*}} void @_ZN5test15test2Ev()
// CHECK: store ptr @__block_literal_global{{.*}}, ptr @out
struct loc { double x, y; };
void test2() {
const loc target = { 5, 6 };
out = ^{ (void) target; };
}
// ...unless they have mutable fields...
// CHECK-LABEL: define{{.*}} void @_ZN5test15test3Ev()
// CHECK: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK: store ptr [[BLOCK]], ptr @out
struct mut { mutable int x; };
void test3() {
const mut obj = { 5 };
out = ^{ (void) obj; };
}
// ...or non-trivial destructors...
// CHECK-LABEL: define{{.*}} void @_ZN5test15test4Ev()
// CHECK: [[OBJ:%.*]] = alloca
// CHECK: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK: store ptr [[BLOCK]], ptr @out
struct scope { int x; ~scope(); };
void test4() {
const scope obj = { 5 };
out = ^{ (void) obj; };
}
// ...or non-trivial copy constructors, but it's not clear how to do
// that and still have a constant initializer in '03.
}
namespace test2 {
struct A {
A();
A(const A &);
~A();
};
struct B {
B();
B(const B &);
~B();
};
// CHECK-LABEL: define{{.*}} void @_ZN5test24testEv()
void test() {
__block A a;
__block B b;
^{ (void)a; (void)b; };
}
// CHECK-LABEL: define internal void @__Block_byref_object_copy
// CHECK: call void @_ZN5test21AC1ERKS0_(
// CHECK-LABEL: define internal void @__Block_byref_object_dispose
// CHECK: call void @_ZN5test21AD1Ev(
// CHECK-LABEL: define internal void @__Block_byref_object_copy
// CHECK: call void @_ZN5test21BC1ERKS0_(
// CHECK-LABEL: define internal void @__Block_byref_object_dispose
// CHECK: call void @_ZN5test21BD1Ev(
}
// Make sure we mark destructors for parameters captured in blocks.
namespace test3 {
struct A {
A(const A&);
~A();
};
struct B : A {
};
void test(B b) {
extern void consume(void(^)());
consume(^{ (void) b; });
}
}
namespace test4 {
struct A {
A();
~A();
};
void foo(A a);
void test() {
extern void consume(void(^)());
consume(^{ return foo(A()); });
}
// CHECK-LABEL: define{{.*}} void @_ZN5test44testEv()
// CHECK-LABEL: define internal void @___ZN5test44testEv_block_invoke
// CHECK: [[TMP:%.*]] = alloca [[A:%.*]], align 1
// CHECK-NEXT: store ptr [[BLOCKDESC:%.*]], ptr {{.*}}, align 8
// CHECK: call void @_ZN5test41AC1Ev(ptr {{[^,]*}} [[TMP]])
// CHECK-NEXT: call void @_ZN5test43fooENS_1AE(ptr noundef [[TMP]])
// CHECK-NEXT: call void @_ZN5test41AD1Ev(ptr {{[^,]*}} [[TMP]])
// CHECK-NEXT: ret void
}
namespace test5 {
struct A {
unsigned afield;
A();
A(const A&);
~A();
void foo() const;
};
void doWithBlock(void(^)());
void test(bool cond) {
A x;
void (^b)() = (cond ? ^{ x.foo(); } : (void(^)()) 0);
doWithBlock(b);
}
// CHECK-LABEL: define{{.*}} void @_ZN5test54testEb(
// CHECK: [[COND:%.*]] = alloca i8
// CHECK-NEXT: [[X:%.*]] = alloca [[A:%.*]], align 4
// CHECK-NEXT: [[B:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:.*]], align 8
// CHECK-NEXT: [[COND_CLEANUP_SAVE:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[CLEANUP_ACTIVE:%.*]] = alloca i1
// CHECK-NEXT: [[T0:%.*]] = zext i1
// CHECK-NEXT: store i8 [[T0]], ptr [[COND]], align 1
// CHECK-NEXT: call void @_ZN5test51AC1Ev(ptr {{[^,]*}} [[X]])
// CHECK-NEXT: [[T0:%.*]] = load i8, ptr [[COND]], align 1
// CHECK-NEXT: [[T1:%.*]] = trunc i8 [[T0]] to i1
// CHECK-NEXT: store i1 false, ptr [[CLEANUP_ACTIVE]]
// CHECK-NEXT: br i1 [[T1]],
// CHECK-NOT: br
// CHECK: [[CAPTURE:%.*]] = getelementptr inbounds nuw [[BLOCK_T]], ptr [[BLOCK]], i32 0, i32 5
// CHECK-NEXT: call void @_ZN5test51AC1ERKS0_(ptr {{[^,]*}} [[CAPTURE]], ptr noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) [[X]])
// CHECK-NEXT: store ptr [[CAPTURE]], ptr [[COND_CLEANUP_SAVE]], align 8
// CHECK-NEXT: store i1 true, ptr [[CLEANUP_ACTIVE]]
// CHECK-NEXT: br label
// CHECK: br label
// CHECK: phi
// CHECK-NEXT: store
// CHECK-NEXT: load
// CHECK-NEXT: call void @_ZN5test511doWithBlockEU13block_pointerFvvE(
// CHECK-NEXT: [[T0:%.*]] = load i1, ptr [[CLEANUP_ACTIVE]]
// CHECK-NEXT: br i1 [[T0]]
// CHECK: [[T3:%.*]] = load ptr, ptr [[COND_CLEANUP_SAVE]], align 8
// CHECK-NEXT: call void @_ZN5test51AD1Ev(ptr {{[^,]*}} [[T3]])
// CHECK-NEXT: br label
// CHECK: call void @_ZN5test51AD1Ev(ptr {{[^,]*}} [[X]])
// CHECK-NEXT: ret void
}
namespace test6 {
struct A {
A();
~A();
};
void foo(const A &, void (^)());
void bar();
void test() {
// Make sure that the temporary cleanup isn't somehow captured
// within the block.
foo(A(), ^{ bar(); });
bar();
}
// CHECK-LABEL: define{{.*}} void @_ZN5test64testEv()
// CHECK: [[TEMP:%.*]] = alloca [[A:%.*]], align 1
// CHECK-NEXT: call void @_ZN5test61AC1Ev(ptr {{[^,]*}} [[TEMP]])
// CHECK-NEXT: call void @_ZN5test63fooERKNS_1AEU13block_pointerFvvE(
// CHECK-NEXT: call void @_ZN5test61AD1Ev(ptr {{[^,]*}} [[TEMP]])
// CHECK-NEXT: call void @_ZN5test63barEv()
// CHECK-NEXT: ret void
}
namespace test7 {
int f() {
static int n;
int *const p = &n;
return ^{ return *p; }();
}
}
namespace test8 {
// failure to capture this after skipping rebuild of the 'this' pointer.
struct X {
int x;
template<typename T>
int foo() {
return ^ { return x; }();
}
};
template int X::foo<int>();
}
namespace test9 {
struct B {
void *p;
B();
B(const B&);
~B();
};
void use_block(void (^)());
void use_block_2(void (^)(), const B &a);
// Ensuring that creating a non-trivial capture copy expression
// doesn't end up stealing the block registration for the block we
// just parsed. That block must have captures or else it won't
// force registration. Must occur within a block for some reason.
void test() {
B x;
use_block(^{
int y;
use_block_2(^{ (void)y; }, x);
});
}
}
namespace test10 {
// Check that 'v' is included in the copy helper function name to indicate
// the constructor taking a volatile parameter is called to copy the captured
// object.
// CHECK-LABEL: define linkonce_odr hidden void @__copy_helper_block_8_32c16_ZTSVN6test101BE(
// CHECK: call void @_ZN6test101BC1ERVKS0_(
// CHECK-LABEL: define linkonce_odr hidden void @__destroy_helper_block_8_32c16_ZTSVN6test101BE(
// CHECK: call void @_ZN6test101BD1Ev(
struct B {
int a;
B();
B(const B &);
B(const volatile B &);
~B();
};
void test() {
volatile B x;
^{ (void)x; };
}
}
// Copy/dispose helper functions and block descriptors of blocks that capture
// objects that are non-external and non-trivial have internal linkage.
// CHECK-LABEL: define internal void @_ZN12_GLOBAL__N_14testEv(
// CHECK: store ptr @[[BLOCK_DESCRIPTOR22]], ptr %{{.*}}, align 8
// CHECK-LABEL: define internal void @__copy_helper_block_8_32c22_ZTSN12_GLOBAL__N_11BE(
// CHECK-LABEL: define internal void @__destroy_helper_block_8_32c22_ZTSN12_GLOBAL__N_11BE(
namespace {
struct B {
int a;
B();
B(const B &);
~B();
};
void test() {
B x;
^{ (void)x; };
}
}
void callTest() {
test();
}
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