xref: /minix3/external/bsd/llvm/dist/clang/test/CodeGen/block-byref-aggr.c (revision f4a2713ac843a11c696ec80c0a5e3e5d80b4d338)
1*f4a2713aSLionel Sambuc // RUN: %clang_cc1 %s -emit-llvm -o - -fblocks -triple x86_64-apple-darwin10 | FileCheck %s
2*f4a2713aSLionel Sambuc 
3*f4a2713aSLionel Sambuc // CHECK: [[AGG:%.*]] = type { i32 }
4*f4a2713aSLionel Sambuc typedef struct { int v; } Agg;
5*f4a2713aSLionel Sambuc Agg makeAgg(void);
6*f4a2713aSLionel Sambuc 
7*f4a2713aSLionel Sambuc // When assigning into a __block variable, ensure that we compute that
8*f4a2713aSLionel Sambuc // address *after* evaluating the RHS when the RHS has the capacity to
9*f4a2713aSLionel Sambuc // cause a block copy.  rdar://9309454
test0()10*f4a2713aSLionel Sambuc void test0() {
11*f4a2713aSLionel Sambuc   __block Agg a = {100};
12*f4a2713aSLionel Sambuc 
13*f4a2713aSLionel Sambuc  a = makeAgg();
14*f4a2713aSLionel Sambuc }
15*f4a2713aSLionel Sambuc // CHECK-LABEL:    define void @test0()
16*f4a2713aSLionel Sambuc // CHECK:      [[A:%.*]] = alloca [[BYREF:%.*]], align 8
17*f4a2713aSLionel Sambuc // CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4
18*f4a2713aSLionel Sambuc // CHECK:      [[RESULT:%.*]] = call i32 @makeAgg()
19*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T0:%.*]] = getelementptr [[AGG]]* [[TEMP]], i32 0, i32 0
20*f4a2713aSLionel Sambuc // CHECK-NEXT: store i32 [[RESULT]], i32* [[T0]]
21*f4a2713aSLionel Sambuc //   Check that we properly assign into the forwarding pointer.
22*f4a2713aSLionel Sambuc // CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[BYREF]]* [[A]], i32 0, i32 1
23*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T0:%.*]] = load [[BYREF]]** [[A_FORWARDING]]
24*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF]]* [[T0]], i32 0, i32 4
25*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8*
26*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8*
27*f4a2713aSLionel Sambuc // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T2]], i8* [[T3]], i64 4, i32 4, i1 false)
28*f4a2713aSLionel Sambuc //   Verify that there's nothing else significant in the function.
29*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T0:%.*]] = bitcast [[BYREF]]* [[A]] to i8*
30*f4a2713aSLionel Sambuc // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
31*f4a2713aSLionel Sambuc // CHECK-NEXT: ret void
32*f4a2713aSLionel Sambuc 
33*f4a2713aSLionel Sambuc // When chaining assignments into __block variables, make sure we
34*f4a2713aSLionel Sambuc // propagate the actual value into the outer variable.
35*f4a2713aSLionel Sambuc // rdar://11757470
test1()36*f4a2713aSLionel Sambuc void test1() {
37*f4a2713aSLionel Sambuc   __block Agg a, b;
38*f4a2713aSLionel Sambuc   a = b = makeAgg();
39*f4a2713aSLionel Sambuc }
40*f4a2713aSLionel Sambuc // CHECK-LABEL:    define void @test1()
41*f4a2713aSLionel Sambuc // CHECK:      [[A:%.*]] = alloca [[A_BYREF:%.*]], align 8
42*f4a2713aSLionel Sambuc // CHECK-NEXT: [[B:%.*]] = alloca [[B_BYREF:%.*]], align 8
43*f4a2713aSLionel Sambuc // CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4
44*f4a2713aSLionel Sambuc // CHECK:      [[RESULT:%.*]] = call i32 @makeAgg()
45*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T0:%.*]] = getelementptr [[AGG]]* [[TEMP]], i32 0, i32 0
46*f4a2713aSLionel Sambuc // CHECK-NEXT: store i32 [[RESULT]], i32* [[T0]]
47*f4a2713aSLionel Sambuc //   Check that we properly assign into the forwarding pointer, first for b:
48*f4a2713aSLionel Sambuc // CHECK-NEXT: [[B_FORWARDING:%.*]] = getelementptr inbounds [[B_BYREF]]* [[B]], i32 0, i32 1
49*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T0:%.*]] = load [[B_BYREF]]** [[B_FORWARDING]]
50*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[B_BYREF]]* [[T0]], i32 0, i32 4
51*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8*
52*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8*
53*f4a2713aSLionel Sambuc // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T2]], i8* [[T3]], i64 4, i32 4, i1 false)
54*f4a2713aSLionel Sambuc //   Then for 'a':
55*f4a2713aSLionel Sambuc // CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[A_BYREF]]* [[A]], i32 0, i32 1
56*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T0:%.*]] = load [[A_BYREF]]** [[A_FORWARDING]]
57*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[A_BYREF]]* [[T0]], i32 0, i32 4
58*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T2:%.*]] = bitcast [[AGG]]* [[T1]] to i8*
59*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T3:%.*]] = bitcast [[AGG]]* [[TEMP]] to i8*
60*f4a2713aSLionel Sambuc // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T2]], i8* [[T3]], i64 4, i32 4, i1 false)
61*f4a2713aSLionel Sambuc //   Verify that there's nothing else significant in the function.
62*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T0:%.*]] = bitcast [[B_BYREF]]* [[B]] to i8*
63*f4a2713aSLionel Sambuc // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
64*f4a2713aSLionel Sambuc // CHECK-NEXT: [[T0:%.*]] = bitcast [[A_BYREF]]* [[A]] to i8*
65*f4a2713aSLionel Sambuc // CHECK-NEXT: call void @_Block_object_dispose(i8* [[T0]], i32 8)
66*f4a2713aSLionel Sambuc // CHECK-NEXT: ret void
67