if (0 || $x) { print "not ok 16\n";} else { print "ok 16\n";}
-# test the optimization of registers
+# test the optimization of variables
$x = 1;
if ($x) { print "ok 17\n";} else { print "not ok 17\n";}
$a = 'a';
$x = 1;
-if ($a eq 'a' && $x) { print "ok 25\n";} else { print "not ok 25\n";}
-if ($a ne 'a' && $x) { print "not ok 26\n";} else { print "ok 26\n";}
+if ($a eq 'a' and $x) { print "ok 25\n";} else { print "not ok 25\n";}
+if ($a ne 'a' and $x) { print "not ok 26\n";} else { print "ok 26\n";}
$x = '';
-if ($a eq 'a' && $x) { print "not ok 27\n";} else { print "ok 27\n";}
-if ($a ne 'a' && $x) { print "not ok 28\n";} else { print "ok 28\n";}
+if ($a eq 'a' and $x) { print "not ok 27\n";} else { print "ok 27\n";}
+if ($a ne 'a' and $x) { print "not ok 28\n";} else { print "ok 28\n";}
$x = 1;
-if ($a eq 'a' || $x) { print "ok 29\n";} else { print "not ok 29\n";}
-if ($a ne 'a' || $x) { print "ok 30\n";} else { print "not ok 30\n";}
+if ($a eq 'a' or $x) { print "ok 29\n";} else { print "not ok 29\n";}
+if ($a ne 'a' or $x) { print "ok 30\n";} else { print "not ok 30\n";}
$x = '';
-if ($a eq 'a' || $x) { print "ok 31\n";} else { print "not ok 31\n";}
-if ($a ne 'a' || $x) { print "not ok 32\n";} else { print "ok 32\n";}
+if ($a eq 'a' or $x) { print "ok 31\n";} else { print "not ok 31\n";}
+if ($a ne 'a' or $x) { print "not ok 32\n";} else { print "ok 32\n";}
$x = 1;
if ($a =~ /a/ && $x) { print "ok 33\n";} else { print "not ok 33\n";}