}
if (subroutines[insn] != null) {
return;
}
subroutines[insn] = sub.copy();
AbstractInsnNode node = insns.get(insn);
// calls findSubroutine recursively on normal successors
if (node instanceof JumpInsnNode) {
if (node.getOpcode() == JSR) {
// do not follow a JSR, it leads to another subroutine!
calls.add(node);
} else {
JumpInsnNode jnode = (JumpInsnNode) node;
findSubroutine(insns.indexOf(jnode.label), sub, calls);
}
} else if (node instanceof TableSwitchInsnNode) {
TableSwitchInsnNode tsnode = (TableSwitchInsnNode) node;
findSubroutine(insns.indexOf(tsnode.dflt), sub, calls);
for (int i = tsnode.labels.size() - 1; i >= 0; --i) {
LabelNode l = (LabelNode) tsnode.labels.get(i);
findSubroutine(insns.indexOf(l), sub, calls);
}
} else if (node instanceof LookupSwitchInsnNode) {
LookupSwitchInsnNode lsnode = (LookupSwitchInsnNode) node;
findSubroutine(insns.indexOf(lsnode.dflt), sub, calls);
for (int i = lsnode.labels.size() - 1; i >= 0; --i) {
LabelNode l = (LabelNode) lsnode.labels.get(i);
findSubroutine(insns.indexOf(l), sub, calls);
}
}
// calls findSubroutine recursively on exception handler successors
List insnHandlers = handlers[insn];
if (insnHandlers != null) {
for (int i = 0; i < insnHandlers.size(); ++i) {
TryCatchBlockNode tcb = (TryCatchBlockNode) insnHandlers
.get(i);
findSubroutine(insns.indexOf(tcb.handler), sub, calls);
}
}
// if insn does not falls through to the next instruction, return.
switch (node.getOpcode()) {
case GOTO:
case RET:
case TABLESWITCH:
case LOOKUPSWITCH:
case IRETURN: