Added a test for if statement

  EXPECT_FALSE(qcor::execute(uint_index, "uint_index"));

}

TEST(qasm3VisitorTester, checkIqpewithIf) {

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

include "qelib1.inc";

// Expected to get 4 bits (iteratively) of 1011 (or 1101 LSB) = 11(decimal):

// phi_est = 11/16 (denom = 16 since we have 4 bits)

// => phi = 2pi * 11/16 = 11pi/8 = 2pi - 5pi/8

// i.e. we estimate the -5*pi/8 angle...

qubit q[2];

const bits_precision = 4;

bit c[bits_precision];

// Prepare the eigen-state: |1>

x q[1];

// First bit

h q[0];

// Controlled rotation: CU^k

for i in [0:8] {

  cphase(-5*pi/8) q[0], q[1];

}

h q[0];

// Measure and reset

measure q[0] -> c[0];

reset q[0];

// Second bit

h q[0];

for i in [0:4] {

  cphase(-5*pi/8) q[0], q[1];

}

// Conditional rotation

if (c[0] == 1) {

  rz(-pi/2) q[0];

}

h q[0];

// Measure and reset

measure q[0] -> c[1];

reset q[0];

// Third bit

h q[0];

for i in [0:2] {

  cphase(-5*pi/8) q[0], q[1];

}

// Conditional rotation

if (c[0] == 1) {

  rz(-pi/4) q[0];

}

if (c[1] == 1) {

  rz(-pi/2) q[0];

}

h q[0];

// Measure and reset

measure q[0] -> c[2];

reset q[0];

// Fourth bit

h q[0];

cphase(-5*pi/8) q[0], q[1];

// Conditional rotation

if (c[0] == 1) {

  rz(-pi/8) q[0];

}

if (c[1] == 1) {

  rz(-pi/4) q[0];

}

if (c[2] == 1) {

  rz(-pi/2) q[0];

}

h q[0];

measure q[0] -> c[3];

print(c[0], c[1], c[2], c[3]);

QCOR_EXPECT_TRUE(c[0] == 1);

QCOR_EXPECT_TRUE(c[1] == 1);

QCOR_EXPECT_TRUE(c[2] == 0);

QCOR_EXPECT_TRUE(c[3] == 1);

)#";

  // Make sure we can compile this in FTQC.

  // i.e., usual if ...

  auto mlir = qcor::mlir_compile(qasm_code, "iqpe",

                                 qcor::OutputType::LLVMIR, false);

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

}

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

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