diff options
Diffstat (limited to 'core/module.c')
| -rw-r--r-- | core/module.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/core/module.c b/core/module.c index 8ac3b48..574d6af 100644 --- a/core/module.c +++ b/core/module.c @@ -690,8 +690,10 @@ PURE_COLD static uint8_t keep_range(PureModule *m, const PureRange *range) { } /* Whether a walk's bounds read nothing its block writes: the states and - * locals it stores, the lists it changes. A bound is found once, before - * the walk; the walk's where reads it anew for every item. */ + * locals it stores, the lists it changes, and what those changes move with + * them (an insert or remove moves the indices into the list, a text's + * change the cursors in it). A bound is found once, before the walk; the + * walk's where reads it anew for every item. */ PURE_COLD static bool bounds_fixed(const PureModule *m, const PureRange *range, PureBlock body) { uint64_t states = 0, locals = 0, lists = 0; for (uint32_t pc = body.start; pc < body.start + body.length; ++pc) { @@ -707,15 +709,24 @@ PURE_COLD static bool bounds_fixed(const PureModule *m, const PureRange *range, default: break; } } + for (uint32_t s = 0; s < m->states; ++s) { + uint32_t ref = m->state_ref[s]; + if ((m->state_type[s] == PURE_STATE_INDEX && lists >> (ref & 63) & 1) || + (m->state_type[s] == PURE_STATE_CURSOR && states >> (ref & 63) & 1)) + states |= (uint64_t)1 << (s & 63); + } for (unsigned side = 0; side < 2; ++side) { PureBlock bound = side ? range->upper : range->lower; if (!(side ? range->upper_relation : range->lower_relation)) continue; for (uint32_t pc = bound.start; pc < bound.start + bound.length; ++pc) { const PureOp *op = &m->code[pc]; int list = list_read(op); - if ((op->op == PURE_OP_LOAD || op->op == PURE_OP_INDEX_LOAD) && states >> (op->arg & 63) & 1) return false; + if ((op->op == PURE_OP_LOAD || op->op == PURE_OP_INDEX_LOAD || op->op == PURE_OP_CUR_LOAD) && + states >> (op->arg & 63) & 1) + return false; if (op->op == PURE_OP_LOCAL_LOAD && locals >> (op->arg & 63) & 1) return false; if (list >= 0 && lists >> (list & 63) & 1) return false; + if (op->op == PURE_OP_INDEX_MOVE && lists) return false; /* the count of its index's list, whichever */ } } return true; |