/**
* Add an instruction to the peephole window. If the window is already full then the first
* instruction will be removed, and passed on to the next delegate to make room for the new
* instruction
*
* @param insn the Instruction to add
*/
private void addInstruction(Instruction insn) {
int size = instructions.size();
InstructionInfo info = null;
if (size == PEEPHOLE_WINDOW_SIZE) {
// reuse the InstructionInfo if we can
info = instructions.remove(0);
finishInstruction(info);
if (lastLabelSeen != NO_LABEL) --lastLabelSeen;
} else {
info = new InstructionInfo();
}
info.reset(insn);
instructions.add(info);
if (labelsFromDeletedInsns != null) {
// If we saved any labels from a deleted instruction sequence,
// apply them here.
// They will always be label currents no matter what the started out
// as - if we deleted something with a labelNext, this is still the next instruction
// and if we deleted something with a labelCurrent then this instruction is the new current
// instruction
for (Label l : labelsFromDeletedInsns) labelCurrent(l);
labelsFromDeletedInsns = null;
}
}
