66 lines
3.4 KiB
C
66 lines
3.4 KiB
C
// RUN: %clang_cc1 %s -emit-llvm -o - -fblocks -triple x86_64-apple-darwin10 | FileCheck %s
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// CHECK: [[AGG:%.*]] = type { i32 }
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typedef struct { int v; } Agg;
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Agg makeAgg(void);
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// When assigning into a __block variable, ensure that we compute that
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// address *after* evaluating the RHS when the RHS has the capacity to
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// cause a block copy. rdar://9309454
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void test0() {
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__block Agg a = {100};
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a = makeAgg();
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}
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// CHECK-LABEL: define void @test0()
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// CHECK: [[A:%.*]] = alloca [[BYREF:%.*]], align 8
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// CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4
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// CHECK: [[RESULT:%.*]] = call i32 @makeAgg()
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// CHECK-NEXT: [[T0:%.*]] = getelementptr [[AGG]]* [[TEMP]], i32 0, i32 0
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// CHECK-NEXT: store i32 [[RESULT]], i32* [[T0]]
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// Check that we properly assign into the forwarding pointer.
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// CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[BYREF]]* [[A]], i32 0, i32 1
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// CHECK-NEXT: [[T0:%.*]] = load [[BYREF]]** [[A_FORWARDING]]
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF]]* [[T0]], i32 0, i32 4
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// CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8*
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// CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T2]], i8* [[T3]], i64 4, i32 4, i1 false)
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// Verify that there's nothing else significant in the function.
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// CHECK-NEXT: [[T0:%.*]] = bitcast [[BYREF]]* [[A]] to i8*
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// CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
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// CHECK-NEXT: ret void
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// When chaining assignments into __block variables, make sure we
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// propagate the actual value into the outer variable.
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// rdar://11757470
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void test1() {
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__block Agg a, b;
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a = b = makeAgg();
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}
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// CHECK-LABEL: define void @test1()
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// CHECK: [[A:%.*]] = alloca [[A_BYREF:%.*]], align 8
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// CHECK-NEXT: [[B:%.*]] = alloca [[B_BYREF:%.*]], align 8
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// CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4
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// CHECK: [[RESULT:%.*]] = call i32 @makeAgg()
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// CHECK-NEXT: [[T0:%.*]] = getelementptr [[AGG]]* [[TEMP]], i32 0, i32 0
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// CHECK-NEXT: store i32 [[RESULT]], i32* [[T0]]
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// Check that we properly assign into the forwarding pointer, first for b:
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// CHECK-NEXT: [[B_FORWARDING:%.*]] = getelementptr inbounds [[B_BYREF]]* [[B]], i32 0, i32 1
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// CHECK-NEXT: [[T0:%.*]] = load [[B_BYREF]]** [[B_FORWARDING]]
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[B_BYREF]]* [[T0]], i32 0, i32 4
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// CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8*
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// CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T2]], i8* [[T3]], i64 4, i32 4, i1 false)
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// Then for 'a':
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// CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[A_BYREF]]* [[A]], i32 0, i32 1
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// CHECK-NEXT: [[T0:%.*]] = load [[A_BYREF]]** [[A_FORWARDING]]
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[A_BYREF]]* [[T0]], i32 0, i32 4
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// CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8*
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// CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T2]], i8* [[T3]], i64 4, i32 4, i1 false)
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// Verify that there's nothing else significant in the function.
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// CHECK-NEXT: [[T0:%.*]] = bitcast [[B_BYREF]]* [[B]] to i8*
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// CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
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// CHECK-NEXT: [[T0:%.*]] = bitcast [[A_BYREF]]* [[A]] to i8*
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// CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
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// CHECK-NEXT: ret void
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