| 1 | // RUN: %clang_cc1 %s -emit-llvm -o - -fblocks -triple x86_64-apple-darwin10 | FileCheck %s |
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| 2 | |
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| 3 | // CHECK: [[AGG:%.*]] = type { i32 } |
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| 4 | typedef struct { int v; } Agg; |
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| 5 | Agg makeAgg(void); |
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| 6 | |
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| 7 | // When assigning into a __block variable, ensure that we compute that |
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| 8 | // address *after* evaluating the RHS when the RHS has the capacity to |
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| 9 | // cause a block copy. rdar://9309454 |
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| 10 | void test0() { |
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| 11 | __block Agg a = {100}; |
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| 12 | ^{ (void)a; }; |
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| 13 | |
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| 14 | a = makeAgg(); |
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| 15 | } |
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| 16 | // CHECK-LABEL: define void @test0() |
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| 17 | // CHECK: [[A:%.*]] = alloca [[BYREF:%.*]], align 8 |
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| 18 | // CHECK-NEXT: alloca <{ i8*, i32, i32, i8*, %{{.*}}*, i8* }>, align 8 |
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| 19 | // CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4 |
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| 20 | // CHECK: [[RESULT:%.*]] = call i32 @makeAgg() |
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| 21 | // CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[AGG]], [[AGG]]* [[TEMP]], i32 0, i32 0 |
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| 22 | // CHECK-NEXT: store i32 [[RESULT]], i32* [[T0]] |
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| 23 | // Check that we properly assign into the forwarding pointer. |
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| 24 | // CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[BYREF]], [[BYREF]]* [[A]], i32 0, i32 1 |
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| 25 | // CHECK-NEXT: [[T0:%.*]] = load [[BYREF]]*, [[BYREF]]** [[A_FORWARDING]] |
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| 26 | // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF]], [[BYREF]]* [[T0]], i32 0, i32 4 |
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| 27 | // CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8* |
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| 28 | // CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8* |
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| 29 | // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 [[T2]], i8* align 4 [[T3]], i64 4, i1 false) |
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| 30 | // Verify that there's nothing else significant in the function. |
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| 31 | // CHECK-NEXT: [[T0:%.*]] = bitcast [[BYREF]]* [[A]] to i8* |
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| 32 | // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8) |
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| 33 | // CHECK-NEXT: ret void |
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| 34 | |
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| 35 | // When chaining assignments into __block variables, make sure we |
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| 36 | // propagate the actual value into the outer variable. |
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| 37 | // rdar://11757470 |
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| 38 | void test1() { |
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| 39 | __block Agg a, b; |
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| 40 | ^{ (void)a; (void)b; }; |
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| 41 | a = b = makeAgg(); |
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| 42 | } |
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| 43 | // CHECK-LABEL: define void @test1() |
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| 44 | // CHECK: [[A:%.*]] = alloca [[A_BYREF:%.*]], align 8 |
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| 45 | // CHECK-NEXT: [[B:%.*]] = alloca [[B_BYREF:%.*]], align 8 |
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| 46 | // CHECK-NEXT: alloca <{ i8*, i32, i32, i8*, %{{.*}}*, i8*, i8* }>, align 8 |
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| 47 | // CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4 |
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| 48 | // CHECK: [[RESULT:%.*]] = call i32 @makeAgg() |
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| 49 | // CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[AGG]], [[AGG]]* [[TEMP]], i32 0, i32 0 |
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| 50 | // CHECK-NEXT: store i32 [[RESULT]], i32* [[T0]] |
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| 51 | // Check that we properly assign into the forwarding pointer, first for b: |
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| 52 | // CHECK-NEXT: [[B_FORWARDING:%.*]] = getelementptr inbounds [[B_BYREF]], [[B_BYREF]]* [[B]], i32 0, i32 1 |
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| 53 | // CHECK-NEXT: [[T0:%.*]] = load [[B_BYREF]]*, [[B_BYREF]]** [[B_FORWARDING]] |
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| 54 | // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[B_BYREF]], [[B_BYREF]]* [[T0]], i32 0, i32 4 |
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| 55 | // CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8* |
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| 56 | // CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8* |
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| 57 | // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 [[T2]], i8* align 4 [[T3]], i64 4, i1 false) |
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| 58 | // Then for 'a': |
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| 59 | // CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[A_BYREF]], [[A_BYREF]]* [[A]], i32 0, i32 1 |
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| 60 | // CHECK-NEXT: [[T0:%.*]] = load [[A_BYREF]]*, [[A_BYREF]]** [[A_FORWARDING]] |
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| 61 | // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[A_BYREF]], [[A_BYREF]]* [[T0]], i32 0, i32 4 |
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| 62 | // CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8* |
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| 63 | // CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8* |
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| 64 | // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 [[T2]], i8* align 4 [[T3]], i64 4, i1 false) |
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| 65 | // Verify that there's nothing else significant in the function. |
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| 66 | // CHECK-NEXT: [[T0:%.*]] = bitcast [[B_BYREF]]* [[B]] to i8* |
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| 67 | // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8) |
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| 68 | // CHECK-NEXT: [[T0:%.*]] = bitcast [[A_BYREF]]* [[A]] to i8* |
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| 69 | // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8) |
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| 70 | // CHECK-NEXT: ret void |
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| 71 | |
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