static inline uintptr_t
ReadAllocation(const IonFrameIterator &frame, const LAllocation *a)
{
if (a->isGeneralReg()) {
Register reg = a->toGeneralReg()->reg();
return frame.machineState().read(reg);
}
if (a->isStackSlot()) {
uint32 slot = a->toStackSlot()->slot();
return *frame.jsFrame()->slotRef(slot);
}
uint32 index = a->toArgument()->index();
uint8 *argv = reinterpret_cast<uint8 *>(frame.jsFrame()->argv());
return *reinterpret_cast<uintptr_t *>(argv + index);
}
SnapshotIterator::SnapshotIterator(const IonFrameIterator &iter)
: SnapshotReader(iter.ionScript()->snapshots() + iter.osiIndex()->snapshotOffset(),
iter.ionScript()->snapshots() + iter.ionScript()->snapshotsSize()),
fp_(iter.jsFrame()),
machine_(iter.machineState()),
ionScript_(iter.ionScript())
{
}
