// RUN: %clang_cc1 -triple x86_64-unknown-nacl -emit-llvm -o - %s| FileCheck %s
#include <stdarg.h>
// Test for x86-64 structure representation (instead of pnacl representation),
// in particular for unions. Also crib a few tests from x86 Linux.

union PP_VarValue {
  int as_int;
  double as_double;
  long long as_i64;
};

struct PP_Var {
  int type;
  int padding;
  union PP_VarValue value;
};

// CHECK: define{{.*}} { i64, i64 } @f0()
struct PP_Var f0(void) {
  struct PP_Var result = { 0, 0, 0 };
  return result;
}

// CHECK-LABEL: define{{.*}} void @f1(i64 %p1.coerce0, i64 %p1.coerce1)
void f1(struct PP_Var p1) { while(1) {} }

// long doubles are 64 bits on NaCl
// CHECK-LABEL: define{{.*}} double @f5()
long double f5(void) {
  return 0;
}

// CHECK-LABEL: define{{.*}} void @f6(i8 noundef signext %a0, i16 noundef signext %a1, i32 noundef %a2, i64 noundef %a3, ptr noundef %a4)
void f6(char a0, short a1, int a2, long long a3, void *a4) {
}

// CHECK-LABEL: define{{.*}} i64 @f8_1()
// CHECK-LABEL: define{{.*}} void @f8_2(i64 %a0.coerce)
union u8 {
  long double a;
  int b;
};
union u8 f8_1(void) { while (1) {} }
void f8_2(union u8 a0) {}

// CHECK-LABEL: define{{.*}} i64 @f9()
struct s9 { int a; int b; int : 0; } f9(void) { while (1) {} }

// CHECK-LABEL: define{{.*}} void @f10(i64 %a0.coerce)
struct s10 { int a; int b; int : 0; };
void f10(struct s10 a0) {}

// CHECK-LABEL: define{{.*}} double @f11()
union { long double a; float b; } f11(void) { while (1) {} }

// CHECK-LABEL: define{{.*}} i32 @f12_0()
// CHECK-LABEL: define{{.*}} void @f12_1(i32 %a0.coerce)
struct s12 { int a __attribute__((aligned(16))); };
struct s12 f12_0(void) { while (1) {} }
void f12_1(struct s12 a0) {}

// Check that sret parameter is accounted for when checking available integer
// registers.
// CHECK: define{{.*}} void @f13(ptr dead_on_unwind noalias writable sret(%struct.s13_0) align 8 %agg.result, i32 noundef %a, i32 noundef %b, i32 noundef %c, i32 noundef %d, ptr noundef byval({{.*}}) align 8 %e, i32 noundef %f)

struct s13_0 { long long f0[3]; };
struct s13_1 { long long f0[2]; };
struct s13_0 f13(int a, int b, int c, int d,
                 struct s13_1 e, int f) { while (1) {} }

// CHECK-LABEL: define{{.*}} void @f20(ptr noundef byval(%struct.s20) align 32 %x)
struct __attribute__((aligned(32))) s20 {
  int x;
  int y;
};
void f20(struct s20 x) {}


// CHECK: declare void @func(i64)
typedef struct _str {
  union {
    long double a;
    long c;
  };
} str;

void func(str s);
str ss;
void f9122143(void)
{
  func(ss);
}