1// RUN: %clang_cc1 -triple x86_64-unknown-nacl -emit-llvm -o - %s| FileCheck %s
2#include <stdarg.h>
3// Test for x86-64 structure representation (instead of pnacl representation),
4// in particular for unions. Also crib a few tests from x86 Linux.
5
6union PP_VarValue {
7  int as_int;
8  double as_double;
9  long long as_i64;
10};
11
12struct PP_Var {
13  int type;
14  int padding;
15  union PP_VarValue value;
16};
17
18// CHECK: define { i64, i64 } @f0()
19struct PP_Var f0() {
20  struct PP_Var result = { 0, 0, 0 };
21  return result;
22}
23
24// CHECK-LABEL: define void @f1(i64 %p1.coerce0, i64 %p1.coerce1)
25void f1(struct PP_Var p1) { while(1) {} }
26
27// long doubles are 64 bits on NaCl
28// CHECK-LABEL: define double @f5()
29long double f5(void) {
30  return 0;
31}
32
33// CHECK-LABEL: define void @f6(i8 signext %a0, i16 signext %a1, i32 %a2, i64 %a3, i8* %a4)
34void f6(char a0, short a1, int a2, long long a3, void *a4) {
35}
36
37// CHECK-LABEL: define i64 @f8_1()
38// CHECK-LABEL: define void @f8_2(i64 %a0.coerce)
39union u8 {
40  long double a;
41  int b;
42};
43union u8 f8_1() { while (1) {} }
44void f8_2(union u8 a0) {}
45
46// CHECK-LABEL: define i64 @f9()
47struct s9 { int a; int b; int : 0; } f9(void) { while (1) {} }
48
49// CHECK-LABEL: define void @f10(i64 %a0.coerce)
50struct s10 { int a; int b; int : 0; };
51void f10(struct s10 a0) {}
52
53// CHECK-LABEL: define double @f11()
54union { long double a; float b; } f11() { while (1) {} }
55
56// CHECK-LABEL: define i32 @f12_0()
57// CHECK-LABEL: define void @f12_1(i32 %a0.coerce)
58struct s12 { int a __attribute__((aligned(16))); };
59struct s12 f12_0(void) { while (1) {} }
60void f12_1(struct s12 a0) {}
61
62// Check that sret parameter is accounted for when checking available integer
63// registers.
64// CHECK: define void @f13(%struct.s13_0* noalias sret %agg.result, i32 %a, i32 %b, i32 %c, i32 %d, {{.*}}* byval align 8 %e, i32 %f)
65
66struct s13_0 { long long f0[3]; };
67struct s13_1 { long long f0[2]; };
68struct s13_0 f13(int a, int b, int c, int d,
69                 struct s13_1 e, int f) { while (1) {} }
70
71// CHECK-LABEL: define void @f20(%struct.s20* byval align 32 %x)
72struct __attribute__((aligned(32))) s20 {
73  int x;
74  int y;
75};
76void f20(struct s20 x) {}
77
78
79// CHECK: declare void @func(i64)
80typedef struct _str {
81  union {
82    long double a;
83    long c;
84  };
85} str;
86
87void func(str s);
88str ss;
89void f9122143()
90{
91  func(ss);
92}
93
94
95typedef struct {
96  int a;
97  int b;
98} s1;
99// CHECK-LABEL: define i32 @f48(%struct.s1* byval %s)
100int __attribute__((pnaclcall)) f48(s1 s) { return s.a; }
101
102// CHECK-LABEL: define void @f49(%struct.s1* noalias sret %agg.result)
103s1 __attribute__((pnaclcall)) f49() { s1 s; s.a = s.b = 1; return s; }
104
105union simple_union {
106  int a;
107  char b;
108};
109// Unions should be passed as byval structs
110// CHECK-LABEL: define void @f50(%union.simple_union* byval %s)
111void __attribute__((pnaclcall)) f50(union simple_union s) {}
112
113typedef struct {
114  int b4 : 4;
115  int b3 : 3;
116  int b8 : 8;
117} bitfield1;
118// Bitfields should be passed as byval structs
119// CHECK-LABEL: define void @f51(%struct.bitfield1* byval %bf1)
120void __attribute__((pnaclcall)) f51(bitfield1 bf1) {}
121