| Fariborz Jahanian | 2c7168c | 2011-04-29 21:53:21 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 %s -emit-llvm -o - -fblocks -triple x86_64-apple-darwin10 | FileCheck %s |
| Fariborz Jahanian | 2c7168c | 2011-04-29 21:53:21 +0000 | [diff] [blame] | 2 | |
| John McCall | e0c1168 | 2012-07-02 23:58:38 +0000 | [diff] [blame] | 3 | // CHECK: [[AGG:%.*]] = type { i32 } |
| 4 | typedef struct { int v; } Agg; |
| 5 | Agg makeAgg(void); |
| Fariborz Jahanian | 2c7168c | 2011-04-29 21:53:21 +0000 | [diff] [blame] | 6 | |
| John McCall | e0c1168 | 2012-07-02 23:58:38 +0000 | [diff] [blame] | 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 |
| 10 | void test0() { |
| 11 | __block Agg a = {100}; |
| Fariborz Jahanian | 2c7168c | 2011-04-29 21:53:21 +0000 | [diff] [blame] | 12 | |
| John McCall | e0c1168 | 2012-07-02 23:58:38 +0000 | [diff] [blame] | 13 | a = makeAgg(); |
| Fariborz Jahanian | 2c7168c | 2011-04-29 21:53:21 +0000 | [diff] [blame] | 14 | } |
| John McCall | e0c1168 | 2012-07-02 23:58:38 +0000 | [diff] [blame] | 15 | // CHECK: 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 [[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]]* [[A]], i32 0, i32 1 |
| 23 | // CHECK-NEXT: [[T0:%.*]] = load [[BYREF]]** [[A_FORWARDING]] |
| 24 | // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[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 |
| 36 | void test1() { |
| 37 | __block Agg a, b; |
| 38 | a = b = makeAgg(); |
| 39 | } |
| 40 | // CHECK: 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 [[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]], i32 0, i32 1 |
| 49 | // CHECK-NEXT: [[T0:%.*]] = load [[B_BYREF]]** [[B_FORWARDING]] |
| 50 | // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[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]], i32 0, i32 1 |
| 56 | // CHECK-NEXT: [[T0:%.*]] = load [[A_BYREF]]** [[A_FORWARDING]] |
| 57 | // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[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 |