private function replaceOpVariable(Operand $from, Operand $to, Op $op)
{
foreach ($op->getVariableNames() as $name) {
if (is_null($op->{$name})) {
continue;
}
if (is_array($op->{$name})) {
// SIGH, PHP won't let me do this directly (parses as $op->($name[$key]))
$result = $op->{$name};
$new = [];
foreach ($result as $key => $value) {
if ($value === $from) {
$new[$key] = $to;
if ($op->isWriteVariable($name)) {
$to->addWriteOp($op);
} else {
$to->addUsage($op);
}
} else {
$new[$key] = $value;
}
}
$op->{$name} = $new;
} elseif ($op->{$name} === $from) {
$op->{$name} = $to;
if ($op->isWriteVariable($name)) {
$to->addWriteOp($op);
} else {
$to->addUsage($op);
}
}
}
}
