for(int i=0; i<sp; i++) stacks[newPC][i] = new Phi();
}
if (stacks[newPC].length != sp) throw new IllegalArgumentException("stack depth disagreement");
for(int i=0; i<sp; i++) stacks[newPC][i] = new Phi();
}
if (stacks[newPC].length != sp) throw new IllegalArgumentException("stack depth disagreement");