/** {@inheritDoc} */
@Override
public DalvInsn withRegisters(RegisterSpecList registers) {
CstInsn result = new CstInsn(getOpcode(), getPosition(), registers, constant);
if (index >= 0) {
result.setIndex(index);
}
if (classIndex >= 0) {
result.setClassIndex(classIndex);
}
return result;
}
/** {@inheritDoc} */
@Override
public DalvInsn withOpcode(Dop opcode) {
CstInsn result = new CstInsn(opcode, getPosition(), getRegisters(), constant);
if (index >= 0) {
result.setIndex(index);
}
if (classIndex >= 0) {
result.setClassIndex(classIndex);
}
return result;
}
/** {@inheritDoc} */
@Override
public boolean isCompatible(DalvInsn insn) {
if (!(insn instanceof CstInsn)) {
return false;
}
RegisterSpecList regs = insn.getRegisters();
RegisterSpec reg;
switch (regs.size()) {
case 1:
{
reg = regs.get(0);
break;
}
case 2:
{
/*
* This format is allowed for ops that are effectively
* 2-arg but where the two args are identical.
*/
reg = regs.get(0);
if (reg.getReg() != regs.get(1).getReg()) {
return false;
}
break;
}
default:
{
return false;
}
}
if (!unsignedFitsInByte(reg.getReg())) {
return false;
}
CstInsn ci = (CstInsn) insn;
int cpi = ci.getIndex();
if (!unsignedFitsInShort(cpi)) {
return false;
}
Constant cst = ci.getConstant();
return (cst instanceof CstType) || (cst instanceof CstFieldRef) || (cst instanceof CstString);
}