1 // RUN: %clang_cc1 %s -triple x86_64-apple-macosx10.7.2 -emit-llvm -o - | FileCheck %s
2
3 struct X { int x[6]; };
4 struct Y { char x[13]; struct X y; } __attribute((packed));
5 struct Y g;
6 void f(struct X);
7 struct X foo(void);
8
9 // <rdar://problem/10463337>
test1()10 struct X test1() {
11 // CHECK: @test1
12 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* {{.*}}, i8* bitcast (%struct.X* getelementptr inbounds (%struct.Y* @g, i32 0, i32 1) to i8*), i64 24, i32 1, i1 false)
13 return g.y;
14 }
test2()15 struct X test2() {
16 // CHECK: @test2
17 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* {{.*}}, i8* bitcast (%struct.X* getelementptr inbounds (%struct.Y* @g, i32 0, i32 1) to i8*), i64 24, i32 1, i1 false)
18 struct X a = g.y;
19 return a;
20 }
21
test3(struct X a)22 void test3(struct X a) {
23 // CHECK: @test3
24 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* bitcast (%struct.X* getelementptr inbounds (%struct.Y* @g, i32 0, i32 1) to i8*), i8* {{.*}}, i64 24, i32 1, i1 false)
25 g.y = a;
26 }
27
28 // <rdar://problem/10530444>
test4()29 void test4() {
30 // CHECK: @test4
31 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* {{.*}}, i8* bitcast (%struct.X* getelementptr inbounds (%struct.Y* @g, i32 0, i32 1) to i8*), i64 24, i32 1, i1 false)
32 f(g.y);
33 }
34
35 // PR12395
test5()36 int test5() {
37 // CHECK: @test5
38 // CHECK: load i32* getelementptr inbounds (%struct.Y* @g, i32 0, i32 1, i32 0, i64 0), align 1
39 return g.y.x[0];
40 }
41
42 // <rdar://problem/11220251>
test6()43 void test6() {
44 // CHECK: @test6
45 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* bitcast (%struct.X* getelementptr inbounds (%struct.Y* @g, i32 0, i32 1) to i8*), i8* %{{.*}}, i64 24, i32 1, i1 false)
46 g.y = foo();
47 }
48
49
50 struct XBitfield {
51 unsigned b1 : 10;
52 unsigned b2 : 12;
53 unsigned b3 : 10;
54 };
55 struct YBitfield {
56 char x;
57 struct XBitfield y;
58 } __attribute((packed));
59 struct YBitfield gbitfield;
60
test7()61 unsigned test7() {
62 // CHECK: @test7
63 // CHECK: load i32* getelementptr inbounds (%struct.YBitfield* @gbitfield, i32 0, i32 1, i32 0), align 4
64 return gbitfield.y.b2;
65 }
66