#include "moar.h"

void MVM_spesh_iterator_init(MVMThreadContext *tc, MVMSpeshIterator *iterator, MVMSpeshGraph *graph) {

    iterator->graph = graph;

    iterator->bb    = graph->entry;

    if (graph->entry)

        iterator->ins   = graph->entry->first_ins;

}

void MVM_spesh_iterator_copy(MVMThreadContext *tc, MVMSpeshIterator *from, MVMSpeshIterator *to) {

    memcpy(to, from, sizeof(MVMSpeshIterator));

}

MVMSpeshIns * MVM_spesh_iterator_next_ins(MVMThreadContext *tc, MVMSpeshIterator *iterator) {

    if (iterator->ins)

        iterator->ins = iterator->ins->next;

    return iterator->ins;

}

MVMSpeshBB * MVM_spesh_iterator_next_bb(MVMThreadContext *tc, MVMSpeshIterator *iterator) {

    if (iterator->bb)

        iterator->bb  = iterator->bb->linear_next;

    if (iterator->bb)

        iterator->ins = iterator->bb->first_ins;

    return iterator->bb;

}

void MVM_spesh_iterator_skip_phi(MVMThreadContext *tc, MVMSpeshIterator *iterator) {

    while (iterator->ins && iterator->ins->info->opcode == MVM_SSA_PHI) {

        iterator->ins = iterator->ins->next;

    }

}