1// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
2
3// Basic base class test.
4struct f0_s0 { unsigned a; };
5struct f0_s1 : public f0_s0 { void *b; };
6// CHECK-LABEL: define void @_Z2f05f0_s1(i32 %a0.coerce0, i8* %a0.coerce1)
7void f0(f0_s1 a0) { }
8
9// Check with two eight-bytes in base class.
10struct f1_s0 { unsigned a; unsigned b; float c; };
11struct f1_s1 : public f1_s0 { float d;};
12// CHECK-LABEL: define void @_Z2f15f1_s1(i64 %a0.coerce0, <2 x float> %a0.coerce1)
13void f1(f1_s1 a0) { }
14
15// Check with two eight-bytes in base class and merge.
16struct f2_s0 { unsigned a; unsigned b; float c; };
17struct f2_s1 : public f2_s0 { char d;};
18// CHECK-LABEL: define void @_Z2f25f2_s1(i64 %a0.coerce0, i64 %a0.coerce1)
19void f2(f2_s1 a0) { }
20
21// PR5831
22// CHECK-LABEL: define void @_Z2f34s3_1(i64 %x.coerce)
23struct s3_0 {};
24struct s3_1 { struct s3_0 a; long b; };
25void f3(struct s3_1 x) {}
26
27// CHECK-LABEL: define i64 @_Z4f4_0M2s4i(i64 %a)
28// CHECK: define {{.*}} @_Z4f4_1M2s4FivE(i64 %a.coerce0, i64 %a.coerce1)
29struct s4 {};
30typedef int s4::* s4_mdp;
31typedef int (s4::*s4_mfp)();
32s4_mdp f4_0(s4_mdp a) { return a; }
33s4_mfp f4_1(s4_mfp a) { return a; }
34
35// A struct with <= one eightbyte before a member data pointer should still
36// be allowed in registers.
37// CHECK-LABEL: define void @{{.*}}f_struct_with_mdp{{.*}}(i8* %a.coerce0, i64 %a.coerce1)
38struct struct_with_mdp { char *a; s4_mdp b; };
39void f_struct_with_mdp(struct_with_mdp a) { (void)a; }
40
41// A struct with anything before a member function will be too big and
42// goes in memory.
43// CHECK-LABEL: define void @{{.*}}f_struct_with_mfp_0{{.*}}(%struct{{.*}} byval align 8 %a)
44struct struct_with_mfp_0 { char a; s4_mfp b; };
45void f_struct_with_mfp_0(struct_with_mfp_0 a) { (void)a; }
46
47// CHECK-LABEL: define void @{{.*}}f_struct_with_mfp_1{{.*}}(%struct{{.*}} byval align 8 %a)
48struct struct_with_mfp_1 { void *a; s4_mfp b; };
49void f_struct_with_mfp_1(struct_with_mfp_1 a) { (void)a; }
50
51namespace PR7523 {
52struct StringRef {
53  char *a;
54};
55
56void AddKeyword(StringRef, int x);
57
58void foo() {
59  // CHECK-LABEL: define void @_ZN6PR75233fooEv()
60  // CHECK: call void @_ZN6PR752310AddKeywordENS_9StringRefEi(i8* {{.*}}, i32 4)
61  AddKeyword(StringRef(), 4);
62}
63}
64
65namespace PR7742 { // Also rdar://8250764
66  struct s2 {
67    float a[2];
68  };
69
70  struct c2 : public s2 {};
71
72  // CHECK-LABEL: define <2 x float> @_ZN6PR77423fooEPNS_2c2E(%"struct.PR7742::c2"* %P)
73  c2 foo(c2 *P) {
74    return c2();
75  }
76
77}
78
79namespace PR5179 {
80  struct B {};
81
82  struct B1 : B {
83    int* pa;
84  };
85
86  struct B2 : B {
87    B1 b1;
88  };
89
90  // CHECK-LABEL: define i8* @_ZN6PR51793barENS_2B2E(i32* %b2.coerce)
91  const void *bar(B2 b2) {
92    return b2.b1.pa;
93  }
94}
95
96namespace test5 {
97  struct Xbase { };
98  struct Empty { };
99  struct Y;
100  struct X : public Xbase {
101    Empty empty;
102    Y f();
103  };
104  struct Y : public X {
105    Empty empty;
106  };
107  X getX();
108  int takeY(const Y&, int y);
109  void g() {
110    // rdar://8340348 - The temporary for the X object needs to have a defined
111    // address when passed into X::f as 'this'.
112    takeY(getX().f(), 42);
113  }
114  // CHECK: void @_ZN5test51gEv()
115  // CHECK: alloca %"struct.test5::Y"
116  // CHECK: alloca %"struct.test5::X"
117  // CHECK: alloca %"struct.test5::Y"
118}
119
120
121// rdar://8360877
122namespace test6 {
123  struct outer {
124    int x;
125    struct epsilon_matcher {} e;
126    int f;
127  };
128
129  int test(outer x) {
130    return x.x + x.f;
131  }
132  // CHECK-LABEL: define i32 @_ZN5test64testENS_5outerE(i64 %x.coerce0, i32 %x.coerce1)
133}
134
135namespace test7 {
136  struct StringRef {char* ptr; long len; };
137  class A { public: ~A(); };
138  A x(A, A, long, long, StringRef) { return A(); }
139  // Check that the StringRef is passed byval instead of expanded
140  // (which would split it between registers and memory).
141  // rdar://problem/9686430
142  // CHECK: define void @_ZN5test71xENS_1AES0_llNS_9StringRefE({{.*}} byval align 8)
143
144  // And a couple extra related tests:
145  A y(A, long double, long, long, StringRef) { return A(); }
146  // CHECK: define void @_ZN5test71yENS_1AEellNS_9StringRefE({{.*}} i8*
147  struct StringDouble {char * ptr; double d;};
148  A z(A, A, A, A, A, StringDouble) { return A(); }
149  A zz(A, A, A, A, StringDouble) { return A(); }
150  // CHECK: define void @_ZN5test71zENS_1AES0_S0_S0_S0_NS_12StringDoubleE({{.*}} byval align 8)
151  // CHECK: define void @_ZN5test72zzENS_1AES0_S0_S0_NS_12StringDoubleE({{.*}} i8*
152}
153
154namespace test8 {
155  // CHECK: declare void @_ZN5test83fooENS_1BE(%"class.test8::B"* byval align 8)
156  class A {
157   char big[17];
158  };
159
160  class B : public A {};
161
162  void foo(B b);
163  void bar() {
164   B b;
165   foo(b);
166  }
167}
168
169// PR4242
170namespace test9 {
171  // Large enough to be passed indirectly.
172  struct S { void *data[3]; };
173
174  struct T { void *data[2]; };
175
176  // CHECK: define void @_ZN5test93fooEPNS_1SEPNS_1TE([[S:%.*]]*, [[T:%.*]]*)
177  void foo(S*, T*) {}
178
179  // CHECK: define void @_ZN5test91aEiiiiNS_1TEPv([[S]]* noalias sret {{%.*}}, i32, i32, i32, i32, [[T]]* byval align 8, i8*)
180  S a(int, int, int, int, T, void*) {
181    return S();
182  }
183
184  // CHECK: define [[S]]* @_ZN5test91bEPNS_1SEiiiiNS_1TEPv([[S]]* {{%.*}}, i32, i32, i32, i32, [[T:%.*]]* byval align 8, i8*)
185  S* b(S* sret, int, int, int, int, T, void*) {
186    return sret;
187  }
188
189  // CHECK: define void @_ZN5test91cEiiiNS_1TEPv([[S]]* noalias sret {{%.*}}, i32, i32, i32, i8* {{%.*}}, i8* {{%.*}}, i8*)
190  S c(int, int, int, T, void*) {
191    return S();
192  }
193
194  // CHECK: define [[S]]* @_ZN5test91dEPNS_1SEiiiNS_1TEPv([[S]]* {{%.*}}, i32, i32, i32, i8* {{%.*}}, i8* {{%.*}}, i8*)
195  S* d(S* sret, int, int, int, T, void*) {
196    return sret;
197  }
198}
199
200namespace test10 {
201#pragma pack(1)
202struct BasePacked {
203  char one;
204  short two;
205};
206#pragma pack()
207struct DerivedPacked : public BasePacked {
208  int three;
209};
210// CHECK-LABEL: define i32 @_ZN6test1020FuncForDerivedPackedENS_13DerivedPackedE({{.*}}* byval align 8
211int FuncForDerivedPacked(DerivedPacked d) {
212  return d.three;
213}
214}
215
216namespace test11 {
217union U {
218  float f1;
219  char __attribute__((__vector_size__(1))) f2;
220};
221int f(union U u) { return u.f2[1]; }
222// CHECK-LABEL: define i32 @_ZN6test111fENS_1UE(i32
223}
224