added a unit test case for the adder circuit compilation

  EXPECT_FALSE(qcor::execute(sub1, "check_deuteron"));

}

TEST(qasm3VisitorTester, checkSubroutineAdder) {

  const std::string sub1 = R"#(OPENQASM 3;

gate ccx a,b,c

{

  h c;

  cx b,c; tdg c;

  cx a,c; t c;

  cx b,c; tdg c;

  cx a,c; t b; t c; h c;

  cx a,b; t a; tdg b;

  cx a,b;

}

gate majority a, b, c {

  cx c, b;

  cx c, a;

  ccx a, b, c;

}

gate unmaj a, b, c {

  ccx a, b, c;

  cx c, a;

  cx a, b;

}

qubit cin;

qubit a[8];

qubit b[8];

qubit cout;

bit ans[9];

// Input values:

uint[8] a_in = 5;  

uint[8] b_in = 4; 

for i in [0:8] {  

  if (bool(a_in[i])) {

    x a[i];

  }

  if (bool(b_in[i])) {

    x b[i];

  }

}

// add a to b, storing result in b

majority cin, b[0], a[0];

for i in [0: 7] { 

  majority a[i], b[i + 1], a[i + 1]; 

}

cx a[7], cout;

for i in [6: -1: -1] { 

  unmaj a[i], b[i+1], a[i+1]; 

}

unmaj cin, b[0], a[0];

measure b[0:7] -> ans[0:7];

measure cout[0] -> ans[8];)#";

  auto llvm_ir = qcor::mlir_compile(sub1, "check_deuteron",

                                    qcor::OutputType::LLVMIR, false);

  std::cout << llvm_ir << "\n";

}

int main(int argc, char **argv) {

  ::testing::InitGoogleTest(&argc, argv);

  auto ret = RUN_ALL_TESTS();