llvm-project/clang/test/CodeGenCXX/constructor-default-arg.cpp

// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++0x -S %s -o %t-64.s
// RUN: FileCheck -check-prefix LP64 --input-file=%t-64.s %s
// RUN: %clang_cc1 -triple i386-apple-darwin -std=c++0x -S %s -o %t-32.s
// RUN: FileCheck -check-prefix LP32 --input-file=%t-32.s %s

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


struct C {
  C() : iC(6) {}
  int iC;
};

int foo() {
  return 6;
};

class X { // ...
public: 
  X(int) {}
  X(const X&, int i = 1, int j = 2, int k = foo()) {
    printf("X(const X&, %d, %d, %d)\n", i, j, k);
  }
};

int main() {
  X a(1);
  X b(a, 2);
  X c = b;
  X d(a, 5, 6);
}

// CHECK-LP64: callq __ZN1XC1ERKS_iii
// CHECK-LP64: callq __ZN1XC1ERKS_iii
// CHECK-LP64: callq __ZN1XC1ERKS_iii

// CHECK-LP32: call L__ZN1XC1ERKS_iii
// CHECK-LP32: call L__ZN1XC1ERKS_iii
// CHECK-LP32: call L__ZN1XC1ERKS_iii