1 // RUN: %clang_cc1 %s -emit-llvm -o - -fblocks -triple x86_64-apple-darwin10 | FileCheck %s
2
3 // CHECK: [[AGG:%.*]] = type { i32 }
4 typedef struct { int v; } Agg;
5 Agg makeAgg(void);
6
7 // When assigning into a __block variable, ensure that we compute that
8 // address *after* evaluating the RHS when the RHS has the capacity to
9 // cause a block copy. rdar://9309454
test0()10 void test0() {
11 __block Agg a = {100};
12
13 a = makeAgg();
14 }
15 // CHECK-LABEL: define void @test0()
16 // CHECK: [[A:%.*]] = alloca [[BYREF:%.*]], align 8
17 // CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4
18 // CHECK: [[RESULT:%.*]] = call i32 @makeAgg()
19 // CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[AGG]], [[AGG]]* [[TEMP]], i32 0, i32 0
20 // CHECK-NEXT: store i32 [[RESULT]], i32* [[T0]]
21 // Check that we properly assign into the forwarding pointer.
22 // CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[BYREF]], [[BYREF]]* [[A]], i32 0, i32 1
23 // CHECK-NEXT: [[T0:%.*]] = load [[BYREF]]*, [[BYREF]]** [[A_FORWARDING]]
24 // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF]], [[BYREF]]* [[T0]], i32 0, i32 4
25 // CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8*
26 // CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8*
27 // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T2]], i8* [[T3]], i64 4, i32 4, i1 false)
28 // Verify that there's nothing else significant in the function.
29 // CHECK-NEXT: [[T0:%.*]] = bitcast [[BYREF]]* [[A]] to i8*
30 // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
31 // CHECK-NEXT: ret void
32
33 // When chaining assignments into __block variables, make sure we
34 // propagate the actual value into the outer variable.
35 // rdar://11757470
test1()36 void test1() {
37 __block Agg a, b;
38 a = b = makeAgg();
39 }
40 // CHECK-LABEL: define void @test1()
41 // CHECK: [[A:%.*]] = alloca [[A_BYREF:%.*]], align 8
42 // CHECK-NEXT: [[B:%.*]] = alloca [[B_BYREF:%.*]], align 8
43 // CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4
44 // CHECK: [[RESULT:%.*]] = call i32 @makeAgg()
45 // CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[AGG]], [[AGG]]* [[TEMP]], i32 0, i32 0
46 // CHECK-NEXT: store i32 [[RESULT]], i32* [[T0]]
47 // Check that we properly assign into the forwarding pointer, first for b:
48 // CHECK-NEXT: [[B_FORWARDING:%.*]] = getelementptr inbounds [[B_BYREF]], [[B_BYREF]]* [[B]], i32 0, i32 1
49 // CHECK-NEXT: [[T0:%.*]] = load [[B_BYREF]]*, [[B_BYREF]]** [[B_FORWARDING]]
50 // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[B_BYREF]], [[B_BYREF]]* [[T0]], i32 0, i32 4
51 // CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8*
52 // CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8*
53 // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T2]], i8* [[T3]], i64 4, i32 4, i1 false)
54 // Then for 'a':
55 // CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[A_BYREF]], [[A_BYREF]]* [[A]], i32 0, i32 1
56 // CHECK-NEXT: [[T0:%.*]] = load [[A_BYREF]]*, [[A_BYREF]]** [[A_FORWARDING]]
57 // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[A_BYREF]], [[A_BYREF]]* [[T0]], i32 0, i32 4
58 // CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8*
59 // CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8*
60 // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T2]], i8* [[T3]], i64 4, i32 4, i1 false)
61 // Verify that there's nothing else significant in the function.
62 // CHECK-NEXT: [[T0:%.*]] = bitcast [[B_BYREF]]* [[B]] to i8*
63 // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
64 // CHECK-NEXT: [[T0:%.*]] = bitcast [[A_BYREF]]* [[A]] to i8*
65 // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
66 // CHECK-NEXT: ret void
67