-- If pattern --



 // block A
 switch (the_var) {
 check == 10 {
  atob();
  // block B
  switch (the_var) {
  default: {
   btoc();
  }
  }
  break;
 }
 default: {
  atoc();
 }
 }
 // block C



-- If-else pattern --



 // block A
 switch (the_var) {
 check == 15 {
  // block B
  switch (the_var) {
  default: {
  }
  }
  break;
 }
 default: {
  // block C
  switch (the_var) {
  default: {
  }
  }
 }
 }
 // block D



-- Loop + tail pattern --



 L0: while(1) {
  // block A
  var check = maybe();
  switch (the_var) {
  default: {
  }
  }
  // block B
  switch (the_var) {
  check == 41 {
   break;
  }
  default: {
   break L0;
  }
  }
 }
 // block C



-- Loop with phi to head 

 // code 1
 switch (the_var) {
 default: {
  var $i_0 = 0;var $x_0 = 5; 
 }
 }
 L1: while(1) {
  // code 2
  switch (the_var) {
  $2 {
   break;
  }
  default: {
   var $x_1 = $x_0; 
   label = 7;
   break L1;
  }
  }
  // code 3
  switch (the_var) {
  $6 {
   break L1;
   break;
  }
  default: {
   var $i_0 = $7;var $x_0 = $5; 
  }
  }
 }
 if (label == 7) {
  // code 7
 }
 // code 4
 switch (the_var) {
 $10 {
  // code 5
  switch (the_var) {
  default: {
  }
  }
  break;
 }
 default: {
 }
 }
 // code 6
 switch (the_var) {
 default: {
  var $x_1 = $13; 
 }
 }
 // code 7



-- phi on split dead ends --



 // block A...................................................................................................
 switch (the_var) {
 chak() {
  atob();
  // block B...................................................................................................
  switch (the_var) {
  default: {
   btod();
  }
  }
  // block D
  break;
 }
 default: {
  atoc();
  // block C...................................................................................................
  switch (the_var) {
  default: {
   ctod2();
  }
  }
  // block D
 }
 }



-- Unbalanced with a dead end --



 // block A
 switch (the_var) {
 check == 10 {
  break;
 }
 default: {
  return C;
 }
 }
 while(1) {
  // block B
  switch (the_var) {
  default: {
  }
  }
  // block D
  switch (the_var) {
  default: {
  }
  }
 }



-- if (expensive || expensive2) X else Y; Z --



 // block A
 L1: do {
  switch (the_var) {
  expensive() {
   label = 3;
   break;
  }
  default: {
   // block B
   switch (the_var) {
   expensive2() {
    label = 3;
    break L1;
    break;
   }
   default: {
   }
   }
   // block D
   switch (the_var) {
   default: {
   }
   }
  }
  }
 } while(0);
 if (label == 3) {
  // block C;
  switch (the_var) {
  default: {
  }
  }
 }
 while(1) {
  // block E
  switch (the_var) {
  default: {
  }
  }
  // block F
  switch (the_var) {
  default: {
  }
  }
 }



-- conditional loop --



 // block A
 L1: do {
  switch (the_var) {
  shouldLoop() {
   while(1) {
    // block B
    switch (the_var) {
    moarLoop() {
     break;
    }
    default: {
     break L1;
    }
    }
   }
   break;
  }
  default: {
  }
  }
 } while(0);
 // block C



-- If pattern, emulated --



 label = 1;
 L0:  while(1) {
  switch(label|0) {
   case 3: {
    // block C
    break;
   }
   case 1: {
    // block A
    if (check == 10) {
     atob();
     label = 2;
     continue L0;
    } else {
     atoc();
     label = 3;
     continue L0;
    }
    break;
   }
   case 2: {
    // block B
    switch (b_check()) {
    case 17: {
     btoc();
     label = 3;
     continue L0;
     break;
    }
    default: {
     label = 1;
     continue L0;
    }
    }
    break;
   }
  }
 }



-- If pattern, emulated, using MakeOutputBuffer --



 label = 1;
 L0:  while(1) {
  switch(label|0) {
   case 3: {
    // block C
    break;
   }
   case 1: {
    // block A
    if (check == 10) {
     atob();
     label = 2;
     continue L0;
    } else {
     atoc();
     label = 3;
     continue L0;
    }
    break;
   }
   case 2: {
    // block B
    switch (b_check()) {
    case 17: {
     btoc();
     label = 3;
     continue L0;
     break;
    }
    default: {
     label = 1;
     continue L0;
    }
    }
    break;
   }
  }
 }



-- If chain (optimized) --

 // block A
 if (a == 10) {
  // block B
 }
 // block C



-- If chain (optimized) --

 // block A
 if (a == 10) {
  // block B
  if (b == 10) {
   // block C
  }
 }
 // block D



-- If chain (optimized, long) --

 // block A
 if (a == 10) {
  // block B
  if (b == 10) {
   // block C
   if (c == 10) {
    // block D
   }
  }
 }
 // block E