llvm-project/clang/test/CodeGenCXX/copy-constructor-synthesis.cpp

// RUN: %clang_cc1 -triple x86_64-apple-darwin -S %s -o %t-64.s
// RUN: FileCheck -check-prefix LP64 --input-file=%t-64.s %s
// RUN: %clang_cc1 -triple i386-apple-darwin -S %s -o %t-32.s
// RUN: FileCheck -check-prefix LP32 --input-file=%t-32.s %s

extern "C" int printf(...);

int init = 100;

struct M {
  int iM;
  M() : iM(init++) {}
};

struct N {
  int iN;
  N() : iN(200) {}
  N(N const & arg){this->iN = arg.iN; }
};

struct P {
  int iP;
  P() : iP(init++) {}
};


struct X  : M, N, P { // ...
  X() : f1(1.0), d1(2.0), i1(3), name("HELLO"), bf1(0xff), bf2(0xabcd),
        au_i1(1234), au1_4("MASKED") {}
  P p0;
  void pr() {
    printf("iM = %d iN = %d, m1.iM = %d\n", iM, iN, m1.iM); 
    printf("im = %d p0.iP = %d, p1.iP = %d\n", iP, p0.iP, p1.iP); 
    printf("f1 = %f  d1 = %f  i1 = %d name(%s) \n", f1, d1, i1, name);
    printf("bf1 = %x  bf2 = %x\n", bf1, bf2);
    printf("au_i2 = %d\n", au_i2); 
    printf("au1_1 = %s\n", au1_1); 
  }
  M m1;
  P p1;
  float f1;
  double d1;
  int i1;
  const char *name;
  unsigned bf1 : 8;
  unsigned bf2 : 16;
  int arr[2];
  _Complex float complex;

  union {
    int au_i1;
    int au_i2;
  };
  union {
    const char * au1_1;
    float au1_2;
    int au1_3;
    const char * au1_4;
  };
};

static int ix = 1;
// class with user-defined copy constructor.
struct S {
  S() : iS(ix++) {  }
  S(const S& arg) { *this = arg; }
  int iS;
};

// class with trivial copy constructor.
struct I {
  I() : iI(ix++) {  }
  int iI;
};

struct XM {
  XM() {  }
  double dXM;
  S ARR_S[3][4][2];
  void pr() {
   for (unsigned i = 0; i < 3; i++)
     for (unsigned j = 0; j < 4; j++)
      for (unsigned k = 0; k < 2; k++)
        printf("ARR_S[%d][%d][%d] = %d\n", i,j,k, ARR_S[i][j][k].iS);
   for (unsigned i = 0; i < 3; i++)
      for (unsigned k = 0; k < 2; k++)
        printf("ARR_I[%d][%d] = %d\n", i,k, ARR_I[i][k].iI);
  }
  I ARR_I[3][2];
};

int main() {
  X a;
  X b(a);
  b.pr();
  X x;
  X c(x);
  c.pr();

  XM m0;
  XM m1 = m0;
  m1.pr();
}

struct A {
};

struct B : A {
  A &a;
};

void f(const B &b1) {
  B b2(b1);
}

// CHECK-LP64: .globl  __ZN1XC1ERKS_
// CHECK-LP64: .weak_definition __ZN1XC1ERKS_
// CHECK-LP64: __ZN1XC1ERKS_:

// CHECK-LP32: .globl  __ZN1XC1ERKS_
// CHECK-LP32: .weak_definition __ZN1XC1ERKS_
// CHECK-LP32: __ZN1XC1ERKS_: