mirror of
https://github.com/licsber/micropython.git
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df8127a17e
Attempt to address issue #386. unique_code_id's have been removed and replaced with a pointer to the "raw code" information. This pointer is stored in the actual byte code (aligned, so the GC can trace it), so that raw code (ie byte code, native code and inline assembler) is kept only for as long as it is needed. In memory it's now like a tree: the outer module's byte code points directly to its children's raw code. So when the outer code gets freed, if there are no remaining functions that need the raw code, then the children's code gets freed as well. This is pretty much like CPython does it, except that CPython stores indexes in the byte code rather than machine pointers. These indices index the per-function constant table in order to find the relevant code.
194 lines
5.4 KiB
C
194 lines
5.4 KiB
C
#include <stdlib.h>
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#include <stdint.h>
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#include <assert.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "lexer.h"
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#include "parse.h"
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#include "obj.h"
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#include "emitglue.h"
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#include "scope.h"
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#include "runtime0.h"
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#include "emit.h"
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struct _emit_t {
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scope_t *scope;
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};
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emit_t *emit_pass1_new(void) {
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emit_t *emit = m_new(emit_t, 1);
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return emit;
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}
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void emit_pass1_free(emit_t *emit) {
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m_del_obj(emit_t, emit);
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}
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STATIC void emit_pass1_dummy(emit_t *emit) {
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}
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STATIC void emit_pass1_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scope) {
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assert(pass == PASS_1);
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emit->scope = scope;
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}
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STATIC void emit_pass1_end_pass(emit_t *emit) {
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}
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STATIC bool emit_pass1_last_emit_was_return_value(emit_t *emit) {
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return false;
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}
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STATIC void emit_pass1_load_id(emit_t *emit, qstr qstr) {
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// name adding/lookup
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bool added;
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id_info_t *id = scope_find_or_add_id(emit->scope, qstr, &added);
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if (added) {
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#if MICROPY_EMIT_CPYTHON
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if (qstr == MP_QSTR_super && emit->scope->kind == SCOPE_FUNCTION) {
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// special case, super is a global, and also counts as use of __class__
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id->kind = ID_INFO_KIND_GLOBAL_EXPLICIT;
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id_info_t *id2 = scope_find_local_in_parent(emit->scope, MP_QSTR___class__);
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if (id2 != NULL) {
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id2 = scope_find_or_add_id(emit->scope, MP_QSTR___class__, &added);
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if (added) {
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id2->kind = ID_INFO_KIND_FREE;
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scope_close_over_in_parents(emit->scope, MP_QSTR___class__);
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}
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}
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} else
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#endif
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{
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id_info_t *id2 = scope_find_local_in_parent(emit->scope, qstr);
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if (id2 != NULL && (id2->kind == ID_INFO_KIND_LOCAL || id2->kind == ID_INFO_KIND_CELL || id2->kind == ID_INFO_KIND_FREE)) {
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id->kind = ID_INFO_KIND_FREE;
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scope_close_over_in_parents(emit->scope, qstr);
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} else {
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id->kind = ID_INFO_KIND_GLOBAL_IMPLICIT;
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}
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}
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}
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}
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STATIC id_info_t *get_id_for_modification(scope_t *scope, qstr qstr) {
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// name adding/lookup
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bool added;
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id_info_t *id = scope_find_or_add_id(scope, qstr, &added);
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if (added) {
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if (scope->kind == SCOPE_MODULE || scope->kind == SCOPE_CLASS) {
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id->kind = ID_INFO_KIND_GLOBAL_IMPLICIT;
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} else {
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id->kind = ID_INFO_KIND_LOCAL;
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}
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} else if (scope->kind >= SCOPE_FUNCTION && scope->kind <= SCOPE_GEN_EXPR && id->kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {
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// rebind as a local variable
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id->kind = ID_INFO_KIND_LOCAL;
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}
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assert(id != NULL); // TODO can this ever fail?
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return id;
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}
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STATIC void emit_pass1_store_id(emit_t *emit, qstr qstr) {
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get_id_for_modification(emit->scope, qstr);
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}
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STATIC void emit_pass1_delete_id(emit_t *emit, qstr qstr) {
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id_info_t *id = get_id_for_modification(emit->scope, qstr);
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// this flag is unused
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//id->flags |= ID_FLAG_IS_DELETED;
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(void)id; // suppress compiler warning
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}
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const emit_method_table_t emit_pass1_method_table = {
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(void*)emit_pass1_dummy,
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emit_pass1_start_pass,
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emit_pass1_end_pass,
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emit_pass1_last_emit_was_return_value,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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emit_pass1_load_id,
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emit_pass1_store_id,
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emit_pass1_delete_id,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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};
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