remove resolver pass
This commit is contained in:
Yuichi Nishiwaki
parent
312c977c17
commit
74294c819f
308
src/codegen.c
308
src/codegen.c
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@ -809,226 +809,6 @@ pic_analyze(pic_state *pic, pic_value obj)
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return obj;
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}
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typedef struct resolver_scope {
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int depth;
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bool varg;
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int argc, localc, capturec;
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xhash *cvs, *lvs;
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struct resolver_scope *up;
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} resolver_scope;
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typedef struct resolver_state {
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pic_state *pic;
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resolver_scope *scope;
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pic_sym sGREF, sCREF, sLREF;
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} resolver_state;
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static void push_resolver_scope(resolver_state *, pic_value, pic_value, bool, pic_value);
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static void pop_resolver_scope(resolver_state *);
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static resolver_state *
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new_resolver_state(pic_state *pic)
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{
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resolver_state *state;
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state = (resolver_state *)pic_alloc(pic, sizeof(resolver_state));
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state->pic = pic;
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state->scope = NULL;
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register_symbol(pic, state, sGREF, "gref");
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register_symbol(pic, state, sLREF, "lref");
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register_symbol(pic, state, sCREF, "cref");
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push_resolver_scope(state, pic_nil_value(), pic_nil_value(), false, pic_nil_value());
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return state;
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}
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static void
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destroy_resolver_state(resolver_state *state)
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{
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pop_resolver_scope(state);
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pic_free(state->pic, state);
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}
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static void
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push_resolver_scope(resolver_state *state, pic_value args, pic_value locals, bool varg, pic_value captures)
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{
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pic_state *pic = state->pic;
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resolver_scope *scope;
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int i;
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scope = (resolver_scope *)pic_alloc(pic, sizeof(resolver_scope));
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scope->up = state->scope;
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scope->depth = scope->up ? scope->up->depth + 1 : 0;
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scope->lvs = xh_new_int();
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scope->cvs = xh_new_int();
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scope->argc = pic_length(pic, args) + 1;
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scope->localc = pic_length(pic, locals);
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scope->capturec = pic_length(pic, captures);
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scope->varg = varg;
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/* arguments */
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for (i = 1; i < scope->argc; ++i) {
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xh_put_int(scope->lvs, pic_sym(pic_list_ref(pic, args, i - 1)), i);
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}
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/* locals */
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for (i = 0; i < scope->localc; ++i) {
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xh_put_int(scope->lvs, pic_sym(pic_list_ref(pic, locals, i)), scope->argc + i);
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}
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/* closed variables */
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for (i = 0; i < scope->capturec; ++i) {
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xh_put_int(scope->cvs, pic_sym(pic_list_ref(pic, captures, i)), i);
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}
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state->scope = scope;
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}
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static void
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pop_resolver_scope(resolver_state *state)
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{
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resolver_scope *scope;
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scope = state->scope;
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xh_destroy(scope->cvs);
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xh_destroy(scope->lvs);
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scope = scope->up;
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pic_free(state->pic, state->scope);
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state->scope = scope;
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}
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static bool
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is_closed(resolver_state *state, pic_sym sym)
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{
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return xh_get_int(state->scope->cvs, sym) != NULL;
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}
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static pic_value
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resolve_lref(resolver_state *state, pic_sym sym)
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{
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pic_state *pic = state->pic;
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int i;
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i = xh_get_int(state->scope->lvs, sym)->val;
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return pic_list2(pic, pic_symbol_value(state->sLREF), pic_int_value(i));
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}
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static pic_value
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resolve_cref(resolver_state *state, int depth, pic_sym sym)
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{
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pic_state *pic = state->pic;
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resolver_scope *scope = state->scope;
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int i, d;
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d = depth;
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while (d-- > 0) {
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scope = scope->up;
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}
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i = xh_get_int(scope->cvs, sym)->val;
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return pic_list3(pic,
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pic_symbol_value(state->sCREF),
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pic_int_value(depth),
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pic_int_value(i));
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}
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static pic_value resolve_reference_node(resolver_state *state, pic_value obj);
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static pic_value
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resolve_reference(resolver_state *state, pic_value obj)
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{
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int ai = pic_gc_arena_preserve(state->pic);
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obj = resolve_reference_node(state, obj);
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pic_gc_arena_restore(state->pic, ai);
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pic_gc_protect(state->pic, obj);
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return obj;
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}
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static pic_value
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resolve_reference_node(resolver_state *state, pic_value obj)
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{
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pic_state *pic = state->pic;
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pic_sym tag;
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if (! pic_pair_p(obj))
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return obj;
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tag = pic_sym(pic_car(pic, obj));
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if (tag == state->sLREF) {
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pic_sym sym;
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sym = pic_sym(pic_list_ref(pic, obj, 1));
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if (! is_closed(state, sym)) {
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return resolve_lref(state, sym);
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}
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else {
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return resolve_cref(state, 0, sym);
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}
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}
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else if (tag == state->sCREF) {
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int depth;
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pic_sym sym;
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depth = pic_int(pic_list_ref(pic, obj, 1));
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sym = pic_sym(pic_list_ref(pic, obj, 2));
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return resolve_cref(state, depth, sym);
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}
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else if (tag == pic->sLAMBDA) {
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pic_value args, locals, closes, body;
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bool varg;
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args = pic_list_ref(pic, obj, 1);
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locals = pic_list_ref(pic, obj, 2);
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varg = pic_true_p(pic_list_ref(pic, obj, 3));
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closes = pic_list_ref(pic, obj, 4);
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body = pic_list_ref(pic, obj, 5);
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push_resolver_scope(state, args, locals, varg, closes);
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{
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body = resolve_reference(state, body);
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}
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pop_resolver_scope(state);
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return pic_list6(pic, pic_symbol_value(pic->sLAMBDA), args, locals, pic_bool_value(varg), closes, body);
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}
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else if (tag == pic->sQUOTE) {
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return obj;
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}
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else {
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int ai = pic_gc_arena_preserve(pic);
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pic_value seq = pic_list1(pic, pic_symbol_value(tag)), elt;
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pic_for_each (elt, pic_cdr(pic, obj)) {
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seq = pic_cons(pic, resolve_reference(state, elt), seq);
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pic_gc_arena_restore(pic, ai);
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pic_gc_protect(pic, seq);
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}
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return pic_reverse(pic, seq);
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}
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}
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static pic_value
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pic_resolve(pic_state *pic, pic_value obj)
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{
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resolver_state *state;
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state = new_resolver_state(pic);
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obj = resolve_reference(state, obj);
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destroy_resolver_state(state);
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return obj;
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}
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/**
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* scope object
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*/
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@ -1210,6 +990,47 @@ pop_codegen_context(codegen_state *state)
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return irep;
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}
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static int
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index_capture(codegen_state *state, pic_sym sym, int depth)
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{
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codegen_context *cxt = state->cxt;
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size_t i;
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pic_sym *var;
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while (depth-- > 0) {
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cxt = cxt->up;
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}
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for (i = 0; i < cxt->captures.size; ++i) {
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var = xv_get(&cxt->captures, i);
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if (*var == sym)
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return i;
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}
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return -1;
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}
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static int
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index_local(codegen_state *state, pic_sym sym)
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{
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codegen_context *cxt = state->cxt;
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size_t i, offset;
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pic_sym *var;
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offset = 1;
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for (i = 0; i < cxt->args.size; ++i) {
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var = xv_get(&cxt->args, i);
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if (*var == sym)
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return i + offset;
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}
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offset += i;
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for (i = 0; i < cxt->locals.size; ++i) {
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var = xv_get(&cxt->locals, i);
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if (*var == sym)
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return i + offset;
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}
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return -1;
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}
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static struct pic_irep *codegen_lambda(codegen_state *, pic_value);
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static void
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@ -1226,14 +1047,27 @@ codegen(codegen_state *state, pic_value obj)
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cxt->clen++;
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return;
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} else if (sym == state->sCREF) {
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pic_sym name;
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int depth;
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CREF:
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depth = pic_int(pic_list_ref(pic, obj, 1));
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name = pic_sym(pic_list_ref(pic, obj, 2));
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cxt->code[cxt->clen].insn = OP_CREF;
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cxt->code[cxt->clen].u.r.depth = pic_int(pic_list_ref(pic, obj, 1));
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cxt->code[cxt->clen].u.r.idx = pic_int(pic_list_ref(pic, obj, 2));
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cxt->code[cxt->clen].u.r.depth = depth;
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cxt->code[cxt->clen].u.r.idx = index_capture(state, name, depth);
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cxt->clen++;
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return;
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} else if (sym == state->sLREF) {
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pic_sym name;
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name = pic_sym(pic_list_ref(pic, obj, 1));
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if (index_capture(state, name, 0) != -1) {
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obj = pic_list3(pic, pic_sym_value(state->sCREF), pic_int_value(0), pic_sym_value(name));
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goto CREF;
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}
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cxt->code[cxt->clen].insn = OP_LREF;
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cxt->code[cxt->clen].u.i = pic_int(pic_list_ref(pic, obj, 1));
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cxt->code[cxt->clen].u.i = index_local(state, name);
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cxt->clen++;
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return;
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} else if (sym == pic->sSETBANG) {
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@ -1254,17 +1088,30 @@ codegen(codegen_state *state, pic_value obj)
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return;
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}
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else if (type == state->sCREF) {
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pic_sym name;
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int depth;
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CSET:
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depth = pic_int(pic_list_ref(pic, var, 1));
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name = pic_sym(pic_list_ref(pic, var, 2));
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cxt->code[cxt->clen].insn = OP_CSET;
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cxt->code[cxt->clen].u.r.depth = pic_int(pic_list_ref(pic, var, 1));
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cxt->code[cxt->clen].u.r.idx = pic_int(pic_list_ref(pic, var, 2));
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cxt->code[cxt->clen].u.r.depth = depth;
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cxt->code[cxt->clen].u.r.idx = index_capture(state, name, depth);
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cxt->clen++;
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cxt->code[cxt->clen].insn = OP_PUSHNONE;
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cxt->clen++;
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return;
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}
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else if (type == state->sLREF) {
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pic_sym name;
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name = pic_sym(pic_list_ref(pic, var, 1));
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if (index_capture(state, name, 0) != -1) {
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var = pic_list3(pic, pic_sym_value(state->sCREF), pic_int_value(0), pic_sym_value(name));
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goto CSET;
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}
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cxt->code[cxt->clen].insn = OP_LSET;
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cxt->code[cxt->clen].u.i = pic_int(pic_list_ref(pic, var, 1));
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cxt->code[cxt->clen].u.i = index_local(state, name);
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cxt->clen++;
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cxt->code[cxt->clen].insn = OP_PUSHNONE;
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cxt->clen++;
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@ -1568,15 +1415,6 @@ pic_compile(pic_state *pic, pic_value obj)
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fprintf(stdout, "ai = %d\n", pic_gc_arena_preserve(pic));
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#endif
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/* resolution */
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obj = pic_resolve(pic, obj);
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#if DEBUG
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fprintf(stdout, "## resolver completed\n");
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pic_debug(pic, obj);
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fprintf(stdout, "\n");
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fprintf(stdout, "ai = %d\n", pic_gc_arena_preserve(pic));
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#endif
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/* codegen */
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irep = pic_codegen(pic, obj);
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#if DEBUG
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