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* align 1 bitcast (%struct.X* getelementptr inbounds (%struct.Y, %struct.Y* @g, i32 0, i32 1) to i8*), i64 24, 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* align 1 bitcast (%struct.X* getelementptr inbounds (%struct.Y, %struct.Y* @g, i32 0, i32 1) to i8*), i64 24, 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* align 1 bitcast (%struct.X* getelementptr inbounds (%struct.Y, %struct.Y* @g, i32 0, i32 1) to i8*), i8* {{.*}}, i64 24, 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* align 1 bitcast (%struct.X* getelementptr inbounds (%struct.Y, %struct.Y* @g, i32 0, i32 1) to i8*), i64 24, i1 false)
32 f(g.y);
33 }
34
35 // PR12395
test5()36 int test5() {
37 // CHECK: @test5
38 // CHECK: load i32, i32* getelementptr inbounds (%struct.Y, %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* align 1 bitcast (%struct.X* getelementptr inbounds (%struct.Y, %struct.Y* @g, i32 0, i32 1) to i8*), i8* align 4 %{{.*}}, i64 24, 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, i32* getelementptr inbounds (%struct.YBitfield, %struct.YBitfield* @gbitfield, i32 0, i32 1, i32 0), align 1
64 return gbitfield.y.b2;
65 }
66
test8(unsigned x)67 void test8(unsigned x) {
68 // CHECK: @test8
69 // CHECK: load i32, i32* getelementptr inbounds (%struct.YBitfield, %struct.YBitfield* @gbitfield, i32 0, i32 1, i32 0), align 1
70 // CHECK: store i32 {{.*}}, i32* getelementptr inbounds (%struct.YBitfield, %struct.YBitfield* @gbitfield, i32 0, i32 1, i32 0), align 1
71 gbitfield.y.b2 = x;
72 }
73
74 struct TBitfield
75 {
76 long a;
77 char b;
78 unsigned c:15;
79 };
80 struct TBitfield tbitfield;
81
test9()82 unsigned test9() {
83 // CHECK: @test9
84 // CHECK: load i16, i16* getelementptr inbounds (%struct.TBitfield, %struct.TBitfield* @tbitfield, i32 0, i32 2), align 1
85 return tbitfield.c;
86 }
87
test10(unsigned x)88 void test10(unsigned x) {
89 // CHECK: @test10
90 // CHECK: load i16, i16* getelementptr inbounds (%struct.TBitfield, %struct.TBitfield* @tbitfield, i32 0, i32 2), align 1
91 // CHECK: store i16 {{.*}}, i16* getelementptr inbounds (%struct.TBitfield, %struct.TBitfield* @tbitfield, i32 0, i32 2), align 1
92 tbitfield.c = x;
93 }
94
95