2 * Copyright (C) 2012, 2013
6 * Permission is hereby granted, free of charge, to any person obtaining a copy of
7 * this software and associated documentation files (the "Software"), to deal in
8 * the Software without restriction, including without limitation the rights to
9 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
10 * of the Software, and to permit persons to whom the Software is furnished to do
11 * so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 #define ast_instantiate(T, ctx, destroyfn) \
32 T* self = (T*)mem_a(sizeof(T)); \
36 ast_node_init((ast_node*)self, ctx, TYPE_##T); \
37 ( (ast_node*)self )->node.destroy = (ast_node_delete*)destroyfn
40 /* It must not be possible to get here. */
41 static GMQCC_NORETURN void _ast_node_destroy(ast_node *self)
44 con_err("ast node missing destroy()\n");
48 /* Initialize main ast node aprts */
49 static void ast_node_init(ast_node *self, lex_ctx ctx, int nodetype)
51 self->node.context = ctx;
52 self->node.destroy = &_ast_node_destroy;
53 self->node.keep = false;
54 self->node.nodetype = nodetype;
55 self->node.side_effects = false;
58 /* weight and side effects */
59 static void _ast_propagate_effects(ast_node *self, ast_node *other)
61 if (ast_side_effects(other))
62 ast_side_effects(self) = true;
64 #define ast_propagate_effects(s,o) _ast_propagate_effects(((ast_node*)(s)), ((ast_node*)(o)))
66 /* General expression initialization */
67 static void ast_expression_init(ast_expression *self,
68 ast_expression_codegen *codegen)
70 self->expression.codegen = codegen;
71 self->expression.vtype = TYPE_VOID;
72 self->expression.next = NULL;
73 self->expression.outl = NULL;
74 self->expression.outr = NULL;
75 self->expression.params = NULL;
76 self->expression.count = 0;
77 self->expression.flags = 0;
80 static void ast_expression_delete(ast_expression *self)
83 if (self->expression.next)
84 ast_delete(self->expression.next);
85 for (i = 0; i < vec_size(self->expression.params); ++i) {
86 ast_delete(self->expression.params[i]);
88 vec_free(self->expression.params);
91 static void ast_expression_delete_full(ast_expression *self)
93 ast_expression_delete(self);
97 ast_value* ast_value_copy(const ast_value *self)
100 const ast_expression_common *fromex;
101 ast_expression_common *selfex;
102 ast_value *cp = ast_value_new(self->expression.node.context, self->name, self->expression.vtype);
103 if (self->expression.next) {
104 cp->expression.next = ast_type_copy(self->expression.node.context, self->expression.next);
105 if (!cp->expression.next) {
106 ast_value_delete(cp);
110 fromex = &self->expression;
111 selfex = &cp->expression;
112 selfex->count = fromex->count;
113 selfex->flags = fromex->flags;
114 for (i = 0; i < vec_size(fromex->params); ++i) {
115 ast_value *v = ast_value_copy(fromex->params[i]);
117 ast_value_delete(cp);
120 vec_push(selfex->params, v);
125 bool ast_type_adopt_impl(ast_expression *self, const ast_expression *other)
128 const ast_expression_common *fromex;
129 ast_expression_common *selfex;
130 self->expression.vtype = other->expression.vtype;
131 if (other->expression.next) {
132 self->expression.next = (ast_expression*)ast_type_copy(ast_ctx(self), other->expression.next);
133 if (!self->expression.next)
136 fromex = &other->expression;
137 selfex = &self->expression;
138 selfex->count = fromex->count;
139 selfex->flags = fromex->flags;
140 for (i = 0; i < vec_size(fromex->params); ++i) {
141 ast_value *v = ast_value_copy(fromex->params[i]);
144 vec_push(selfex->params, v);
149 static ast_expression* ast_shallow_type(lex_ctx ctx, int vtype)
151 ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
152 ast_expression_init(self, NULL);
153 self->expression.codegen = NULL;
154 self->expression.next = NULL;
155 self->expression.vtype = vtype;
159 ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
162 const ast_expression_common *fromex;
163 ast_expression_common *selfex;
169 ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
170 ast_expression_init(self, NULL);
172 fromex = &ex->expression;
173 selfex = &self->expression;
175 /* This may never be codegen()d */
176 selfex->codegen = NULL;
178 selfex->vtype = fromex->vtype;
181 selfex->next = ast_type_copy(ctx, fromex->next);
183 ast_expression_delete_full(self);
190 selfex->count = fromex->count;
191 selfex->flags = fromex->flags;
192 for (i = 0; i < vec_size(fromex->params); ++i) {
193 ast_value *v = ast_value_copy(fromex->params[i]);
195 ast_expression_delete_full(self);
198 vec_push(selfex->params, v);
205 bool ast_compare_type(ast_expression *a, ast_expression *b)
207 if (a->expression.vtype == TYPE_NIL ||
208 b->expression.vtype == TYPE_NIL)
210 if (a->expression.vtype != b->expression.vtype)
212 if (!a->expression.next != !b->expression.next)
214 if (vec_size(a->expression.params) != vec_size(b->expression.params))
216 if ((a->expression.flags & AST_FLAG_TYPE_MASK) !=
217 (b->expression.flags & AST_FLAG_TYPE_MASK) )
221 if (vec_size(a->expression.params)) {
223 for (i = 0; i < vec_size(a->expression.params); ++i) {
224 if (!ast_compare_type((ast_expression*)a->expression.params[i],
225 (ast_expression*)b->expression.params[i]))
229 if (a->expression.next)
230 return ast_compare_type(a->expression.next, b->expression.next);
234 static size_t ast_type_to_string_impl(ast_expression *e, char *buf, size_t bufsize, size_t pos)
241 if (pos + 6 >= bufsize)
243 strcpy(buf + pos, "(null)");
247 if (pos + 1 >= bufsize)
250 switch (e->expression.vtype) {
252 strcpy(buf + pos, "(variant)");
257 return ast_type_to_string_impl(e->expression.next, buf, bufsize, pos);
260 if (pos + 3 >= bufsize)
264 pos = ast_type_to_string_impl(e->expression.next, buf, bufsize, pos);
265 if (pos + 1 >= bufsize)
271 pos = ast_type_to_string_impl(e->expression.next, buf, bufsize, pos);
272 if (pos + 2 >= bufsize)
274 if (!vec_size(e->expression.params)) {
280 pos = ast_type_to_string_impl((ast_expression*)(e->expression.params[0]), buf, bufsize, pos);
281 for (i = 1; i < vec_size(e->expression.params); ++i) {
282 if (pos + 2 >= bufsize)
286 pos = ast_type_to_string_impl((ast_expression*)(e->expression.params[i]), buf, bufsize, pos);
288 if (pos + 1 >= bufsize)
294 pos = ast_type_to_string_impl(e->expression.next, buf, bufsize, pos);
295 if (pos + 1 >= bufsize)
298 pos += snprintf(buf + pos, bufsize - pos - 1, "%i", (int)e->expression.count);
299 if (pos + 1 >= bufsize)
305 typestr = type_name[e->expression.vtype];
306 typelen = strlen(typestr);
307 if (pos + typelen >= bufsize)
309 strcpy(buf + pos, typestr);
310 return pos + typelen;
314 buf[bufsize-3] = '.';
315 buf[bufsize-2] = '.';
316 buf[bufsize-1] = '.';
320 void ast_type_to_string(ast_expression *e, char *buf, size_t bufsize)
322 size_t pos = ast_type_to_string_impl(e, buf, bufsize-1, 0);
326 ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
328 ast_instantiate(ast_value, ctx, ast_value_delete);
329 ast_expression_init((ast_expression*)self,
330 (ast_expression_codegen*)&ast_value_codegen);
331 self->expression.node.keep = true; /* keep */
333 self->name = name ? util_strdup(name) : NULL;
334 self->expression.vtype = t;
335 self->expression.next = NULL;
336 self->isfield = false;
338 self->hasvalue = false;
340 memset(&self->constval, 0, sizeof(self->constval));
343 self->ir_values = NULL;
344 self->ir_value_count = 0;
353 void ast_value_delete(ast_value* self)
356 mem_d((void*)self->name);
357 if (self->hasvalue) {
358 switch (self->expression.vtype)
361 mem_d((void*)self->constval.vstring);
364 /* unlink us from the function node */
365 self->constval.vfunc->vtype = NULL;
367 /* NOTE: delete function? currently collected in
368 * the parser structure
375 mem_d(self->ir_values);
380 ast_expression_delete((ast_expression*)self);
384 void ast_value_params_add(ast_value *self, ast_value *p)
386 vec_push(self->expression.params, p);
389 bool ast_value_set_name(ast_value *self, const char *name)
392 mem_d((void*)self->name);
393 self->name = util_strdup(name);
397 ast_binary* ast_binary_new(lex_ctx ctx, int op,
398 ast_expression* left, ast_expression* right)
400 ast_instantiate(ast_binary, ctx, ast_binary_delete);
401 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_binary_codegen);
407 ast_propagate_effects(self, left);
408 ast_propagate_effects(self, right);
410 if (op >= INSTR_EQ_F && op <= INSTR_GT)
411 self->expression.vtype = TYPE_FLOAT;
412 else if (op == INSTR_AND || op == INSTR_OR) {
413 if (OPTS_FLAG(PERL_LOGIC))
414 ast_type_adopt(self, right);
416 self->expression.vtype = TYPE_FLOAT;
418 else if (op == INSTR_BITAND || op == INSTR_BITOR)
419 self->expression.vtype = TYPE_FLOAT;
420 else if (op == INSTR_MUL_VF || op == INSTR_MUL_FV)
421 self->expression.vtype = TYPE_VECTOR;
422 else if (op == INSTR_MUL_V)
423 self->expression.vtype = TYPE_FLOAT;
425 self->expression.vtype = left->expression.vtype;
430 void ast_binary_delete(ast_binary *self)
432 ast_unref(self->left);
433 ast_unref(self->right);
434 ast_expression_delete((ast_expression*)self);
438 ast_binstore* ast_binstore_new(lex_ctx ctx, int storop, int op,
439 ast_expression* left, ast_expression* right)
441 ast_instantiate(ast_binstore, ctx, ast_binstore_delete);
442 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_binstore_codegen);
444 ast_side_effects(self) = true;
446 self->opstore = storop;
449 self->source = right;
451 self->keep_dest = false;
453 if (!ast_type_adopt(self, left)) {
461 void ast_binstore_delete(ast_binstore *self)
463 if (!self->keep_dest)
464 ast_unref(self->dest);
465 ast_unref(self->source);
466 ast_expression_delete((ast_expression*)self);
470 ast_unary* ast_unary_new(lex_ctx ctx, int op,
471 ast_expression *expr)
473 ast_instantiate(ast_unary, ctx, ast_unary_delete);
474 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_unary_codegen);
477 self->operand = expr;
479 ast_propagate_effects(self, expr);
481 if (op >= INSTR_NOT_F && op <= INSTR_NOT_FNC) {
482 self->expression.vtype = TYPE_FLOAT;
484 compile_error(ctx, "cannot determine type of unary operation %s", asm_instr[op].m);
489 void ast_unary_delete(ast_unary *self)
491 if (self->operand) ast_unref(self->operand);
492 ast_expression_delete((ast_expression*)self);
496 ast_return* ast_return_new(lex_ctx ctx, ast_expression *expr)
498 ast_instantiate(ast_return, ctx, ast_return_delete);
499 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_return_codegen);
501 self->operand = expr;
504 ast_propagate_effects(self, expr);
509 void ast_return_delete(ast_return *self)
512 ast_unref(self->operand);
513 ast_expression_delete((ast_expression*)self);
517 ast_entfield* ast_entfield_new(lex_ctx ctx, ast_expression *entity, ast_expression *field)
519 if (field->expression.vtype != TYPE_FIELD) {
520 compile_error(ctx, "ast_entfield_new with expression not of type field");
523 return ast_entfield_new_force(ctx, entity, field, field->expression.next);
526 ast_entfield* ast_entfield_new_force(lex_ctx ctx, ast_expression *entity, ast_expression *field, const ast_expression *outtype)
528 ast_instantiate(ast_entfield, ctx, ast_entfield_delete);
532 /* Error: field has no type... */
536 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_entfield_codegen);
538 self->entity = entity;
540 ast_propagate_effects(self, entity);
541 ast_propagate_effects(self, field);
543 if (!ast_type_adopt(self, outtype)) {
544 ast_entfield_delete(self);
551 void ast_entfield_delete(ast_entfield *self)
553 ast_unref(self->entity);
554 ast_unref(self->field);
555 ast_expression_delete((ast_expression*)self);
559 ast_member* ast_member_new(lex_ctx ctx, ast_expression *owner, unsigned int field, const char *name)
561 ast_instantiate(ast_member, ctx, ast_member_delete);
567 if (owner->expression.vtype != TYPE_VECTOR &&
568 owner->expression.vtype != TYPE_FIELD) {
569 compile_error(ctx, "member-access on an invalid owner of type %s", type_name[owner->expression.vtype]);
574 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_member_codegen);
575 self->expression.node.keep = true; /* keep */
577 if (owner->expression.vtype == TYPE_VECTOR) {
578 self->expression.vtype = TYPE_FLOAT;
579 self->expression.next = NULL;
581 self->expression.vtype = TYPE_FIELD;
582 self->expression.next = ast_shallow_type(ctx, TYPE_FLOAT);
585 self->rvalue = false;
587 ast_propagate_effects(self, owner);
591 self->name = util_strdup(name);
598 void ast_member_delete(ast_member *self)
600 /* The owner is always an ast_value, which has .keep=true,
601 * also: ast_members are usually deleted after the owner, thus
602 * this will cause invalid access
603 ast_unref(self->owner);
604 * once we allow (expression).x to access a vector-member, we need
605 * to change this: preferably by creating an alternate ast node for this
606 * purpose that is not garbage-collected.
608 ast_expression_delete((ast_expression*)self);
612 bool ast_member_set_name(ast_member *self, const char *name)
615 mem_d((void*)self->name);
616 self->name = util_strdup(name);
620 ast_array_index* ast_array_index_new(lex_ctx ctx, ast_expression *array, ast_expression *index)
622 ast_expression *outtype;
623 ast_instantiate(ast_array_index, ctx, ast_array_index_delete);
625 outtype = array->expression.next;
628 /* Error: field has no type... */
632 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_array_index_codegen);
636 ast_propagate_effects(self, array);
637 ast_propagate_effects(self, index);
639 if (!ast_type_adopt(self, outtype)) {
640 ast_array_index_delete(self);
643 if (array->expression.vtype == TYPE_FIELD && outtype->expression.vtype == TYPE_ARRAY) {
644 if (self->expression.vtype != TYPE_ARRAY) {
645 compile_error(ast_ctx(self), "array_index node on type");
646 ast_array_index_delete(self);
649 self->array = outtype;
650 self->expression.vtype = TYPE_FIELD;
656 void ast_array_index_delete(ast_array_index *self)
658 ast_unref(self->array);
659 ast_unref(self->index);
660 ast_expression_delete((ast_expression*)self);
664 ast_ifthen* ast_ifthen_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
666 ast_instantiate(ast_ifthen, ctx, ast_ifthen_delete);
667 if (!ontrue && !onfalse) {
668 /* because it is invalid */
672 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_ifthen_codegen);
675 self->on_true = ontrue;
676 self->on_false = onfalse;
677 ast_propagate_effects(self, cond);
679 ast_propagate_effects(self, ontrue);
681 ast_propagate_effects(self, onfalse);
686 void ast_ifthen_delete(ast_ifthen *self)
688 ast_unref(self->cond);
690 ast_unref(self->on_true);
692 ast_unref(self->on_false);
693 ast_expression_delete((ast_expression*)self);
697 ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
699 ast_expression *exprtype = ontrue;
700 ast_instantiate(ast_ternary, ctx, ast_ternary_delete);
701 /* This time NEITHER must be NULL */
702 if (!ontrue || !onfalse) {
706 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_ternary_codegen);
709 self->on_true = ontrue;
710 self->on_false = onfalse;
711 ast_propagate_effects(self, cond);
712 ast_propagate_effects(self, ontrue);
713 ast_propagate_effects(self, onfalse);
715 if (ontrue->expression.vtype == TYPE_NIL)
717 if (!ast_type_adopt(self, exprtype)) {
718 ast_ternary_delete(self);
725 void ast_ternary_delete(ast_ternary *self)
727 ast_unref(self->cond);
728 ast_unref(self->on_true);
729 ast_unref(self->on_false);
730 ast_expression_delete((ast_expression*)self);
734 ast_loop* ast_loop_new(lex_ctx ctx,
735 ast_expression *initexpr,
736 ast_expression *precond, bool pre_not,
737 ast_expression *postcond, bool post_not,
738 ast_expression *increment,
739 ast_expression *body)
741 ast_instantiate(ast_loop, ctx, ast_loop_delete);
742 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_loop_codegen);
744 self->initexpr = initexpr;
745 self->precond = precond;
746 self->postcond = postcond;
747 self->increment = increment;
750 self->pre_not = pre_not;
751 self->post_not = post_not;
754 ast_propagate_effects(self, initexpr);
756 ast_propagate_effects(self, precond);
758 ast_propagate_effects(self, postcond);
760 ast_propagate_effects(self, increment);
762 ast_propagate_effects(self, body);
767 void ast_loop_delete(ast_loop *self)
770 ast_unref(self->initexpr);
772 ast_unref(self->precond);
774 ast_unref(self->postcond);
776 ast_unref(self->increment);
778 ast_unref(self->body);
779 ast_expression_delete((ast_expression*)self);
783 ast_breakcont* ast_breakcont_new(lex_ctx ctx, bool iscont, unsigned int levels)
785 ast_instantiate(ast_breakcont, ctx, ast_breakcont_delete);
786 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_breakcont_codegen);
788 self->is_continue = iscont;
789 self->levels = levels;
794 void ast_breakcont_delete(ast_breakcont *self)
796 ast_expression_delete((ast_expression*)self);
800 ast_switch* ast_switch_new(lex_ctx ctx, ast_expression *op)
802 ast_instantiate(ast_switch, ctx, ast_switch_delete);
803 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_switch_codegen);
808 ast_propagate_effects(self, op);
813 void ast_switch_delete(ast_switch *self)
816 ast_unref(self->operand);
818 for (i = 0; i < vec_size(self->cases); ++i) {
819 if (self->cases[i].value)
820 ast_unref(self->cases[i].value);
821 ast_unref(self->cases[i].code);
823 vec_free(self->cases);
825 ast_expression_delete((ast_expression*)self);
829 ast_label* ast_label_new(lex_ctx ctx, const char *name, bool undefined)
831 ast_instantiate(ast_label, ctx, ast_label_delete);
832 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_label_codegen);
834 self->name = util_strdup(name);
835 self->irblock = NULL;
837 self->undefined = undefined;
842 void ast_label_delete(ast_label *self)
844 mem_d((void*)self->name);
845 vec_free(self->gotos);
846 ast_expression_delete((ast_expression*)self);
850 void ast_label_register_goto(ast_label *self, ast_goto *g)
852 vec_push(self->gotos, g);
855 ast_goto* ast_goto_new(lex_ctx ctx, const char *name)
857 ast_instantiate(ast_goto, ctx, ast_goto_delete);
858 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_goto_codegen);
860 self->name = util_strdup(name);
862 self->irblock_from = NULL;
867 void ast_goto_delete(ast_goto *self)
869 mem_d((void*)self->name);
870 ast_expression_delete((ast_expression*)self);
874 void ast_goto_set_label(ast_goto *self, ast_label *label)
876 self->target = label;
879 ast_call* ast_call_new(lex_ctx ctx,
880 ast_expression *funcexpr)
882 ast_instantiate(ast_call, ctx, ast_call_delete);
883 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_call_codegen);
885 ast_side_effects(self) = true;
888 self->func = funcexpr;
890 ast_type_adopt(self, funcexpr->expression.next);
895 void ast_call_delete(ast_call *self)
898 for (i = 0; i < vec_size(self->params); ++i)
899 ast_unref(self->params[i]);
900 vec_free(self->params);
903 ast_unref(self->func);
905 ast_expression_delete((ast_expression*)self);
909 bool ast_call_check_types(ast_call *self)
913 const ast_expression *func = self->func;
914 size_t count = vec_size(self->params);
915 if (count > vec_size(func->expression.params))
916 count = vec_size(func->expression.params);
918 for (i = 0; i < count; ++i) {
919 if (!ast_compare_type(self->params[i], (ast_expression*)(func->expression.params[i])))
923 ast_type_to_string(self->params[i], tgot, sizeof(tgot));
924 ast_type_to_string((ast_expression*)func->expression.params[i], texp, sizeof(texp));
925 compile_error(ast_ctx(self), "invalid type for parameter %u in function call: expected %s, got %s",
926 (unsigned int)(i+1), texp, tgot);
927 /* we don't immediately return */
934 ast_store* ast_store_new(lex_ctx ctx, int op,
935 ast_expression *dest, ast_expression *source)
937 ast_instantiate(ast_store, ctx, ast_store_delete);
938 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_store_codegen);
940 ast_side_effects(self) = true;
944 self->source = source;
946 if (!ast_type_adopt(self, dest)) {
954 void ast_store_delete(ast_store *self)
956 ast_unref(self->dest);
957 ast_unref(self->source);
958 ast_expression_delete((ast_expression*)self);
962 ast_block* ast_block_new(lex_ctx ctx)
964 ast_instantiate(ast_block, ctx, ast_block_delete);
965 ast_expression_init((ast_expression*)self,
966 (ast_expression_codegen*)&ast_block_codegen);
970 self->collect = NULL;
975 bool ast_block_add_expr(ast_block *self, ast_expression *e)
977 ast_propagate_effects(self, e);
978 vec_push(self->exprs, e);
979 if (self->expression.next) {
980 ast_delete(self->expression.next);
981 self->expression.next = NULL;
983 if (!ast_type_adopt(self, e)) {
984 compile_error(ast_ctx(self), "internal error: failed to adopt type");
990 void ast_block_collect(ast_block *self, ast_expression *expr)
992 vec_push(self->collect, expr);
993 expr->expression.node.keep = true;
996 void ast_block_delete(ast_block *self)
999 for (i = 0; i < vec_size(self->exprs); ++i)
1000 ast_unref(self->exprs[i]);
1001 vec_free(self->exprs);
1002 for (i = 0; i < vec_size(self->locals); ++i)
1003 ast_delete(self->locals[i]);
1004 vec_free(self->locals);
1005 for (i = 0; i < vec_size(self->collect); ++i)
1006 ast_delete(self->collect[i]);
1007 vec_free(self->collect);
1008 ast_expression_delete((ast_expression*)self);
1012 bool ast_block_set_type(ast_block *self, ast_expression *from)
1014 if (self->expression.next)
1015 ast_delete(self->expression.next);
1016 if (!ast_type_adopt(self, from))
1021 ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
1023 ast_instantiate(ast_function, ctx, ast_function_delete);
1027 vtype->expression.vtype != TYPE_FUNCTION)
1029 compile_error(ast_ctx(self), "internal error: ast_function_new condition %i %i type=%i (probably 2 bodies?)",
1031 (int)vtype->hasvalue,
1032 vtype->expression.vtype);
1037 self->vtype = vtype;
1038 self->name = name ? util_strdup(name) : NULL;
1039 self->blocks = NULL;
1041 self->labelcount = 0;
1044 self->ir_func = NULL;
1045 self->curblock = NULL;
1047 self->breakblocks = NULL;
1048 self->continueblocks = NULL;
1050 vtype->hasvalue = true;
1051 vtype->constval.vfunc = self;
1056 void ast_function_delete(ast_function *self)
1060 mem_d((void*)self->name);
1062 /* ast_value_delete(self->vtype); */
1063 self->vtype->hasvalue = false;
1064 self->vtype->constval.vfunc = NULL;
1065 /* We use unref - if it was stored in a global table it is supposed
1066 * to be deleted from *there*
1068 ast_unref(self->vtype);
1070 for (i = 0; i < vec_size(self->blocks); ++i)
1071 ast_delete(self->blocks[i]);
1072 vec_free(self->blocks);
1073 vec_free(self->breakblocks);
1074 vec_free(self->continueblocks);
1078 const char* ast_function_label(ast_function *self, const char *prefix)
1084 if (!opts.dump && !opts.dumpfin && !opts.debug)
1087 id = (self->labelcount++);
1088 len = strlen(prefix);
1090 from = self->labelbuf + sizeof(self->labelbuf)-1;
1093 *from-- = (id%10) + '0';
1097 memcpy(from - len, prefix, len);
1101 /*********************************************************************/
1103 * by convention you must never pass NULL to the 'ir_value **out'
1104 * parameter. If you really don't care about the output, pass a dummy.
1105 * But I can't imagine a pituation where the output is truly unnecessary.
1108 void _ast_codegen_output_type(ast_expression_common *self, ir_value *out)
1110 if (out->vtype == TYPE_FIELD)
1111 out->fieldtype = self->next->expression.vtype;
1112 if (out->vtype == TYPE_FUNCTION)
1113 out->outtype = self->next->expression.vtype;
1116 #define codegen_output_type(a,o) (_ast_codegen_output_type(&((a)->expression),(o)))
1118 bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_value **out)
1122 if (self->expression.vtype == TYPE_NIL) {
1123 *out = func->ir_func->owner->nil;
1126 /* NOTE: This is the codegen for a variable used in an expression.
1127 * It is not the codegen to generate the value. For this purpose,
1128 * ast_local_codegen and ast_global_codegen are to be used before this
1129 * is executed. ast_function_codegen should take care of its locals,
1130 * and the ast-user should take care of ast_global_codegen to be used
1131 * on all the globals.
1134 char tname[1024]; /* typename is reserved in C++ */
1135 ast_type_to_string((ast_expression*)self, tname, sizeof(tname));
1136 compile_error(ast_ctx(self), "ast_value used before generated %s %s", tname, self->name);
1143 bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
1147 if (self->expression.vtype == TYPE_NIL) {
1148 compile_error(ast_ctx(self), "internal error: trying to generate a variable of TYPE_NIL");
1152 if (self->hasvalue && self->expression.vtype == TYPE_FUNCTION)
1154 ir_function *func = ir_builder_create_function(ir, self->name, self->expression.next->expression.vtype);
1157 func->context = ast_ctx(self);
1158 func->value->context = ast_ctx(self);
1160 self->constval.vfunc->ir_func = func;
1161 self->ir_v = func->value;
1162 /* The function is filled later on ast_function_codegen... */
1166 if (isfield && self->expression.vtype == TYPE_FIELD) {
1167 ast_expression *fieldtype = self->expression.next;
1169 if (self->hasvalue) {
1170 compile_error(ast_ctx(self), "TODO: constant field pointers with value");
1174 if (fieldtype->expression.vtype == TYPE_ARRAY) {
1179 ast_expression_common *elemtype;
1181 ast_value *array = (ast_value*)fieldtype;
1183 if (!ast_istype(fieldtype, ast_value)) {
1184 compile_error(ast_ctx(self), "internal error: ast_value required");
1188 /* we are lame now - considering the way QC works we won't tolerate arrays > 1024 elements */
1189 if (!array->expression.count || array->expression.count > opts.max_array_size)
1190 compile_error(ast_ctx(self), "Invalid array of size %lu", (unsigned long)array->expression.count);
1192 elemtype = &array->expression.next->expression;
1193 vtype = elemtype->vtype;
1195 v = ir_builder_create_field(ir, self->name, vtype);
1197 compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", self->name);
1200 v->context = ast_ctx(self);
1201 v->unique_life = true;
1203 array->ir_v = self->ir_v = v;
1205 namelen = strlen(self->name);
1206 name = (char*)mem_a(namelen + 16);
1207 strcpy(name, self->name);
1209 array->ir_values = (ir_value**)mem_a(sizeof(array->ir_values[0]) * array->expression.count);
1210 array->ir_values[0] = v;
1211 for (ai = 1; ai < array->expression.count; ++ai) {
1212 snprintf(name + namelen, 16, "[%u]", (unsigned int)ai);
1213 array->ir_values[ai] = ir_builder_create_field(ir, name, vtype);
1214 if (!array->ir_values[ai]) {
1216 compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", name);
1219 array->ir_values[ai]->context = ast_ctx(self);
1220 array->ir_values[ai]->unique_life = true;
1221 array->ir_values[ai]->locked = true;
1227 v = ir_builder_create_field(ir, self->name, self->expression.next->expression.vtype);
1230 v->context = ast_ctx(self);
1236 if (self->expression.vtype == TYPE_ARRAY) {
1241 ast_expression_common *elemtype = &self->expression.next->expression;
1242 int vtype = elemtype->vtype;
1244 /* same as with field arrays */
1245 if (!self->expression.count || self->expression.count > opts.max_array_size)
1246 compile_error(ast_ctx(self), "Invalid array of size %lu", (unsigned long)self->expression.count);
1248 v = ir_builder_create_global(ir, self->name, vtype);
1250 compile_error(ast_ctx(self), "ir_builder_create_global failed `%s`", self->name);
1253 v->context = ast_ctx(self);
1254 v->unique_life = true;
1257 namelen = strlen(self->name);
1258 name = (char*)mem_a(namelen + 16);
1259 strcpy(name, self->name);
1261 self->ir_values = (ir_value**)mem_a(sizeof(self->ir_values[0]) * self->expression.count);
1262 self->ir_values[0] = v;
1263 for (ai = 1; ai < self->expression.count; ++ai) {
1264 snprintf(name + namelen, 16, "[%u]", (unsigned int)ai);
1265 self->ir_values[ai] = ir_builder_create_global(ir, name, vtype);
1266 if (!self->ir_values[ai]) {
1268 compile_error(ast_ctx(self), "ir_builder_create_global failed `%s`", name);
1271 self->ir_values[ai]->context = ast_ctx(self);
1272 self->ir_values[ai]->unique_life = true;
1273 self->ir_values[ai]->locked = true;
1279 /* Arrays don't do this since there's no "array" value which spans across the
1282 v = ir_builder_create_global(ir, self->name, self->expression.vtype);
1284 compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", self->name);
1287 codegen_output_type(self, v);
1288 v->context = ast_ctx(self);
1291 if (self->hasvalue) {
1292 switch (self->expression.vtype)
1295 if (!ir_value_set_float(v, self->constval.vfloat))
1299 if (!ir_value_set_vector(v, self->constval.vvec))
1303 if (!ir_value_set_string(v, self->constval.vstring))
1307 compile_error(ast_ctx(self), "TODO: global constant array");
1310 compile_error(ast_ctx(self), "global of type function not properly generated");
1312 /* Cannot generate an IR value for a function,
1313 * need a pointer pointing to a function rather.
1316 if (!self->constval.vfield) {
1317 compile_error(ast_ctx(self), "field constant without vfield set");
1320 if (!self->constval.vfield->ir_v) {
1321 compile_error(ast_ctx(self), "field constant generated before its field");
1324 if (!ir_value_set_field(v, self->constval.vfield->ir_v))
1328 compile_error(ast_ctx(self), "TODO: global constant type %i", self->expression.vtype);
1333 /* link us to the ir_value */
1338 error: /* clean up */
1343 bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
1347 if (self->expression.vtype == TYPE_NIL) {
1348 compile_error(ast_ctx(self), "internal error: trying to generate a variable of TYPE_NIL");
1352 if (self->hasvalue && self->expression.vtype == TYPE_FUNCTION)
1354 /* Do we allow local functions? I think not...
1355 * this is NOT a function pointer atm.
1360 if (self->expression.vtype == TYPE_ARRAY) {
1365 ast_expression_common *elemtype = &self->expression.next->expression;
1366 int vtype = elemtype->vtype;
1368 func->flags |= IR_FLAG_HAS_ARRAYS;
1371 compile_error(ast_ctx(self), "array-parameters are not supported");
1375 /* we are lame now - considering the way QC works we won't tolerate arrays > 1024 elements */
1376 if (!self->expression.count || self->expression.count > opts.max_array_size) {
1377 compile_error(ast_ctx(self), "Invalid array of size %lu", (unsigned long)self->expression.count);
1380 self->ir_values = (ir_value**)mem_a(sizeof(self->ir_values[0]) * self->expression.count);
1381 if (!self->ir_values) {
1382 compile_error(ast_ctx(self), "failed to allocate array values");
1386 v = ir_function_create_local(func, self->name, vtype, param);
1388 compile_error(ast_ctx(self), "ir_function_create_local failed");
1391 v->context = ast_ctx(self);
1392 v->unique_life = true;
1395 namelen = strlen(self->name);
1396 name = (char*)mem_a(namelen + 16);
1397 strcpy(name, self->name);
1399 self->ir_values[0] = v;
1400 for (ai = 1; ai < self->expression.count; ++ai) {
1401 snprintf(name + namelen, 16, "[%u]", (unsigned int)ai);
1402 self->ir_values[ai] = ir_function_create_local(func, name, vtype, param);
1403 if (!self->ir_values[ai]) {
1404 compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", name);
1407 self->ir_values[ai]->context = ast_ctx(self);
1408 self->ir_values[ai]->unique_life = true;
1409 self->ir_values[ai]->locked = true;
1414 v = ir_function_create_local(func, self->name, self->expression.vtype, param);
1417 codegen_output_type(self, v);
1418 v->context = ast_ctx(self);
1421 /* A constant local... hmmm...
1422 * I suppose the IR will have to deal with this
1424 if (self->hasvalue) {
1425 switch (self->expression.vtype)
1428 if (!ir_value_set_float(v, self->constval.vfloat))
1432 if (!ir_value_set_vector(v, self->constval.vvec))
1436 if (!ir_value_set_string(v, self->constval.vstring))
1440 compile_error(ast_ctx(self), "TODO: global constant type %i", self->expression.vtype);
1445 /* link us to the ir_value */
1449 if (!ast_generate_accessors(self, func->owner))
1453 error: /* clean up */
1458 bool ast_generate_accessors(ast_value *self, ir_builder *ir)
1461 bool warn = OPTS_WARN(WARN_USED_UNINITIALIZED);
1462 if (!self->setter || !self->getter)
1464 for (i = 0; i < self->expression.count; ++i) {
1465 if (!self->ir_values) {
1466 compile_error(ast_ctx(self), "internal error: no array values generated for `%s`", self->name);
1469 if (!self->ir_values[i]) {
1470 compile_error(ast_ctx(self), "internal error: not all array values have been generated for `%s`", self->name);
1473 if (self->ir_values[i]->life) {
1474 compile_error(ast_ctx(self), "internal error: function containing `%s` already generated", self->name);
1479 opts_set(opts.warn, WARN_USED_UNINITIALIZED, false);
1481 if (!ast_global_codegen (self->setter, ir, false) ||
1482 !ast_function_codegen(self->setter->constval.vfunc, ir) ||
1483 !ir_function_finalize(self->setter->constval.vfunc->ir_func))
1485 compile_error(ast_ctx(self), "internal error: failed to generate setter for `%s`", self->name);
1486 opts_set(opts.warn, WARN_USED_UNINITIALIZED, warn);
1491 if (!ast_global_codegen (self->getter, ir, false) ||
1492 !ast_function_codegen(self->getter->constval.vfunc, ir) ||
1493 !ir_function_finalize(self->getter->constval.vfunc->ir_func))
1495 compile_error(ast_ctx(self), "internal error: failed to generate getter for `%s`", self->name);
1496 opts_set(opts.warn, WARN_USED_UNINITIALIZED, warn);
1500 for (i = 0; i < self->expression.count; ++i) {
1501 vec_free(self->ir_values[i]->life);
1503 opts_set(opts.warn, WARN_USED_UNINITIALIZED, warn);
1507 bool ast_function_codegen(ast_function *self, ir_builder *ir)
1511 ast_expression_common *ec;
1516 irf = self->ir_func;
1518 compile_error(ast_ctx(self), "ast_function's related ast_value was not generated yet");
1522 /* fill the parameter list */
1523 ec = &self->vtype->expression;
1524 for (i = 0; i < vec_size(ec->params); ++i)
1526 if (ec->params[i]->expression.vtype == TYPE_FIELD)
1527 vec_push(irf->params, ec->params[i]->expression.next->expression.vtype);
1529 vec_push(irf->params, ec->params[i]->expression.vtype);
1530 if (!self->builtin) {
1531 if (!ast_local_codegen(ec->params[i], self->ir_func, true))
1536 if (self->builtin) {
1537 irf->builtin = self->builtin;
1541 if (!vec_size(self->blocks)) {
1542 compile_error(ast_ctx(self), "function `%s` has no body", self->name);
1546 self->curblock = ir_function_create_block(ast_ctx(self), irf, "entry");
1547 if (!self->curblock) {
1548 compile_error(ast_ctx(self), "failed to allocate entry block for `%s`", self->name);
1552 for (i = 0; i < vec_size(self->blocks); ++i) {
1553 ast_expression_codegen *gen = self->blocks[i]->expression.codegen;
1554 if (!(*gen)((ast_expression*)self->blocks[i], self, false, &dummy))
1558 /* TODO: check return types */
1559 if (!self->curblock->final)
1561 if (!self->vtype->expression.next ||
1562 self->vtype->expression.next->expression.vtype == TYPE_VOID)
1564 return ir_block_create_return(self->curblock, ast_ctx(self), NULL);
1566 else if (vec_size(self->curblock->entries))
1568 /* error("missing return"); */
1569 if (compile_warning(ast_ctx(self), WARN_MISSING_RETURN_VALUES,
1570 "control reaches end of non-void function (`%s`) via %s",
1571 self->name, self->curblock->label))
1575 return ir_block_create_return(self->curblock, ast_ctx(self), NULL);
1581 /* Note, you will not see ast_block_codegen generate ir_blocks.
1582 * To the AST and the IR, blocks are 2 different things.
1583 * In the AST it represents a block of code, usually enclosed in
1584 * curly braces {...}.
1585 * While in the IR it represents a block in terms of control-flow.
1587 bool ast_block_codegen(ast_block *self, ast_function *func, bool lvalue, ir_value **out)
1591 /* We don't use this
1592 * Note: an ast-representation using the comma-operator
1593 * of the form: (a, b, c) = x should not assign to c...
1596 compile_error(ast_ctx(self), "not an l-value (code-block)");
1600 if (self->expression.outr) {
1601 *out = self->expression.outr;
1605 /* output is NULL at first, we'll have each expression
1606 * assign to out output, thus, a comma-operator represention
1607 * using an ast_block will return the last generated value,
1608 * so: (b, c) + a executed both b and c, and returns c,
1609 * which is then added to a.
1613 /* generate locals */
1614 for (i = 0; i < vec_size(self->locals); ++i)
1616 if (!ast_local_codegen(self->locals[i], func->ir_func, false)) {
1618 compile_error(ast_ctx(self), "failed to generate local `%s`", self->locals[i]->name);
1623 for (i = 0; i < vec_size(self->exprs); ++i)
1625 ast_expression_codegen *gen;
1626 if (func->curblock->final && !ast_istype(self->exprs[i], ast_label)) {
1627 if (compile_warning(ast_ctx(self->exprs[i]), WARN_UNREACHABLE_CODE, "unreachable statement"))
1631 gen = self->exprs[i]->expression.codegen;
1632 if (!(*gen)(self->exprs[i], func, false, out))
1636 self->expression.outr = *out;
1641 bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_value **out)
1643 ast_expression_codegen *cgen;
1644 ir_value *left = NULL;
1645 ir_value *right = NULL;
1649 ast_array_index *ai = NULL;
1651 if (lvalue && self->expression.outl) {
1652 *out = self->expression.outl;
1656 if (!lvalue && self->expression.outr) {
1657 *out = self->expression.outr;
1661 if (ast_istype(self->dest, ast_array_index))
1664 ai = (ast_array_index*)self->dest;
1665 idx = (ast_value*)ai->index;
1667 if (ast_istype(ai->index, ast_value) && idx->hasvalue && idx->cvq == CV_CONST)
1672 /* we need to call the setter */
1673 ir_value *iridx, *funval;
1677 compile_error(ast_ctx(self), "array-subscript assignment cannot produce lvalues");
1681 arr = (ast_value*)ai->array;
1682 if (!ast_istype(ai->array, ast_value) || !arr->setter) {
1683 compile_error(ast_ctx(self), "value has no setter (%s)", arr->name);
1687 cgen = idx->expression.codegen;
1688 if (!(*cgen)((ast_expression*)(idx), func, false, &iridx))
1691 cgen = arr->setter->expression.codegen;
1692 if (!(*cgen)((ast_expression*)(arr->setter), func, true, &funval))
1695 cgen = self->source->expression.codegen;
1696 if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
1699 call = ir_block_create_call(func->curblock, ast_ctx(self), ast_function_label(func, "store"), funval, false);
1702 ir_call_param(call, iridx);
1703 ir_call_param(call, right);
1704 self->expression.outr = right;
1710 cgen = self->dest->expression.codegen;
1712 if (!(*cgen)((ast_expression*)(self->dest), func, true, &left))
1714 self->expression.outl = left;
1716 cgen = self->source->expression.codegen;
1718 if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
1721 if (!ir_block_create_store_op(func->curblock, ast_ctx(self), self->op, left, right))
1723 self->expression.outr = right;
1726 /* Theoretically, an assinment returns its left side as an
1727 * lvalue, if we don't need an lvalue though, we return
1728 * the right side as an rvalue, otherwise we have to
1729 * somehow know whether or not we need to dereference the pointer
1730 * on the left side - that is: OP_LOAD if it was an address.
1731 * Also: in original QC we cannot OP_LOADP *anyway*.
1733 *out = (lvalue ? left : right);
1738 bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_value **out)
1740 ast_expression_codegen *cgen;
1741 ir_value *left, *right;
1743 /* A binary operation cannot yield an l-value */
1745 compile_error(ast_ctx(self), "not an l-value (binop)");
1749 if (self->expression.outr) {
1750 *out = self->expression.outr;
1754 if ((OPTS_FLAG(SHORT_LOGIC) || OPTS_FLAG(PERL_LOGIC)) &&
1755 (self->op == INSTR_AND || self->op == INSTR_OR))
1757 /* short circuit evaluation */
1758 ir_block *other, *merge;
1759 ir_block *from_left, *from_right;
1763 /* prepare end-block */
1764 merge_id = vec_size(func->ir_func->blocks);
1765 merge = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "sce_merge"));
1767 /* generate the left expression */
1768 cgen = self->left->expression.codegen;
1769 if (!(*cgen)((ast_expression*)(self->left), func, false, &left))
1771 /* remember the block */
1772 from_left = func->curblock;
1774 /* create a new block for the right expression */
1775 other = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "sce_other"));
1776 if (self->op == INSTR_AND) {
1777 /* on AND: left==true -> other */
1778 if (!ir_block_create_if(func->curblock, ast_ctx(self), left, other, merge))
1781 /* on OR: left==false -> other */
1782 if (!ir_block_create_if(func->curblock, ast_ctx(self), left, merge, other))
1785 /* use the likely flag */
1786 vec_last(func->curblock->instr)->likely = true;
1788 /* enter the right-expression's block */
1789 func->curblock = other;
1791 cgen = self->right->expression.codegen;
1792 if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
1794 /* remember block */
1795 from_right = func->curblock;
1797 /* jump to the merge block */
1798 if (!ir_block_create_jump(func->curblock, ast_ctx(self), merge))
1801 vec_remove(func->ir_func->blocks, merge_id, 1);
1802 vec_push(func->ir_func->blocks, merge);
1804 func->curblock = merge;
1805 phi = ir_block_create_phi(func->curblock, ast_ctx(self),
1806 ast_function_label(func, "sce_value"),
1807 self->expression.vtype);
1808 ir_phi_add(phi, from_left, left);
1809 ir_phi_add(phi, from_right, right);
1810 *out = ir_phi_value(phi);
1814 if (!OPTS_FLAG(PERL_LOGIC)) {
1816 if (OPTS_FLAG(CORRECT_LOGIC) && (*out)->vtype == TYPE_VECTOR) {
1817 *out = ir_block_create_unary(func->curblock, ast_ctx(self),
1818 ast_function_label(func, "sce_bool_v"),
1822 *out = ir_block_create_unary(func->curblock, ast_ctx(self),
1823 ast_function_label(func, "sce_bool"),
1828 else if (OPTS_FLAG(FALSE_EMPTY_STRINGS) && (*out)->vtype == TYPE_STRING) {
1829 *out = ir_block_create_unary(func->curblock, ast_ctx(self),
1830 ast_function_label(func, "sce_bool_s"),
1834 *out = ir_block_create_unary(func->curblock, ast_ctx(self),
1835 ast_function_label(func, "sce_bool"),
1841 *out = ir_block_create_binop(func->curblock, ast_ctx(self),
1842 ast_function_label(func, "sce_bool"),
1843 INSTR_AND, *out, *out);
1849 self->expression.outr = *out;
1850 codegen_output_type(self, *out);
1854 cgen = self->left->expression.codegen;
1855 if (!(*cgen)((ast_expression*)(self->left), func, false, &left))
1858 cgen = self->right->expression.codegen;
1859 if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
1862 *out = ir_block_create_binop(func->curblock, ast_ctx(self), ast_function_label(func, "bin"),
1863 self->op, left, right);
1866 self->expression.outr = *out;
1867 codegen_output_type(self, *out);
1872 bool ast_binstore_codegen(ast_binstore *self, ast_function *func, bool lvalue, ir_value **out)
1874 ast_expression_codegen *cgen;
1875 ir_value *leftl = NULL, *leftr, *right, *bin;
1879 ast_array_index *ai = NULL;
1880 ir_value *iridx = NULL;
1882 if (lvalue && self->expression.outl) {
1883 *out = self->expression.outl;
1887 if (!lvalue && self->expression.outr) {
1888 *out = self->expression.outr;
1892 if (ast_istype(self->dest, ast_array_index))
1895 ai = (ast_array_index*)self->dest;
1896 idx = (ast_value*)ai->index;
1898 if (ast_istype(ai->index, ast_value) && idx->hasvalue && idx->cvq == CV_CONST)
1902 /* for a binstore we need both an lvalue and an rvalue for the left side */
1903 /* rvalue of destination! */
1905 cgen = idx->expression.codegen;
1906 if (!(*cgen)((ast_expression*)(idx), func, false, &iridx))
1909 cgen = self->dest->expression.codegen;
1910 if (!(*cgen)((ast_expression*)(self->dest), func, false, &leftr))
1913 /* source as rvalue only */
1914 cgen = self->source->expression.codegen;
1915 if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
1918 /* now the binary */
1919 bin = ir_block_create_binop(func->curblock, ast_ctx(self), ast_function_label(func, "binst"),
1920 self->opbin, leftr, right);
1921 self->expression.outr = bin;
1925 /* we need to call the setter */
1930 compile_error(ast_ctx(self), "array-subscript assignment cannot produce lvalues");
1934 arr = (ast_value*)ai->array;
1935 if (!ast_istype(ai->array, ast_value) || !arr->setter) {
1936 compile_error(ast_ctx(self), "value has no setter (%s)", arr->name);
1940 cgen = arr->setter->expression.codegen;
1941 if (!(*cgen)((ast_expression*)(arr->setter), func, true, &funval))
1944 call = ir_block_create_call(func->curblock, ast_ctx(self), ast_function_label(func, "store"), funval, false);
1947 ir_call_param(call, iridx);
1948 ir_call_param(call, bin);
1949 self->expression.outr = bin;
1951 /* now store them */
1952 cgen = self->dest->expression.codegen;
1953 /* lvalue of destination */
1954 if (!(*cgen)((ast_expression*)(self->dest), func, true, &leftl))
1956 self->expression.outl = leftl;
1958 if (!ir_block_create_store_op(func->curblock, ast_ctx(self), self->opstore, leftl, bin))
1960 self->expression.outr = bin;
1963 /* Theoretically, an assinment returns its left side as an
1964 * lvalue, if we don't need an lvalue though, we return
1965 * the right side as an rvalue, otherwise we have to
1966 * somehow know whether or not we need to dereference the pointer
1967 * on the left side - that is: OP_LOAD if it was an address.
1968 * Also: in original QC we cannot OP_LOADP *anyway*.
1970 *out = (lvalue ? leftl : bin);
1975 bool ast_unary_codegen(ast_unary *self, ast_function *func, bool lvalue, ir_value **out)
1977 ast_expression_codegen *cgen;
1980 /* An unary operation cannot yield an l-value */
1982 compile_error(ast_ctx(self), "not an l-value (binop)");
1986 if (self->expression.outr) {
1987 *out = self->expression.outr;
1991 cgen = self->operand->expression.codegen;
1993 if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
1996 *out = ir_block_create_unary(func->curblock, ast_ctx(self), ast_function_label(func, "unary"),
2000 self->expression.outr = *out;
2005 bool ast_return_codegen(ast_return *self, ast_function *func, bool lvalue, ir_value **out)
2007 ast_expression_codegen *cgen;
2012 /* In the context of a return operation, we don't actually return
2016 compile_error(ast_ctx(self), "return-expression is not an l-value");
2020 if (self->expression.outr) {
2021 compile_error(ast_ctx(self), "internal error: ast_return cannot be reused, it bears no result!");
2024 self->expression.outr = (ir_value*)1;
2026 if (self->operand) {
2027 cgen = self->operand->expression.codegen;
2029 if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
2032 if (!ir_block_create_return(func->curblock, ast_ctx(self), operand))
2035 if (!ir_block_create_return(func->curblock, ast_ctx(self), NULL))
2042 bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, ir_value **out)
2044 ast_expression_codegen *cgen;
2045 ir_value *ent, *field;
2047 /* This function needs to take the 'lvalue' flag into account!
2048 * As lvalue we provide a field-pointer, as rvalue we provide the
2052 if (lvalue && self->expression.outl) {
2053 *out = self->expression.outl;
2057 if (!lvalue && self->expression.outr) {
2058 *out = self->expression.outr;
2062 cgen = self->entity->expression.codegen;
2063 if (!(*cgen)((ast_expression*)(self->entity), func, false, &ent))
2066 cgen = self->field->expression.codegen;
2067 if (!(*cgen)((ast_expression*)(self->field), func, false, &field))
2072 *out = ir_block_create_fieldaddress(func->curblock, ast_ctx(self), ast_function_label(func, "efa"),
2075 *out = ir_block_create_load_from_ent(func->curblock, ast_ctx(self), ast_function_label(func, "efv"),
2076 ent, field, self->expression.vtype);
2077 /* Done AFTER error checking:
2078 codegen_output_type(self, *out);
2082 compile_error(ast_ctx(self), "failed to create %s instruction (output type %s)",
2083 (lvalue ? "ADDRESS" : "FIELD"),
2084 type_name[self->expression.vtype]);
2088 codegen_output_type(self, *out);
2091 self->expression.outl = *out;
2093 self->expression.outr = *out;
2095 /* Hm that should be it... */
2099 bool ast_member_codegen(ast_member *self, ast_function *func, bool lvalue, ir_value **out)
2101 ast_expression_codegen *cgen;
2104 /* in QC this is always an lvalue */
2105 if (lvalue && self->rvalue) {
2106 compile_error(ast_ctx(self), "not an l-value (member access)");
2109 if (self->expression.outl) {
2110 *out = self->expression.outl;
2114 cgen = self->owner->expression.codegen;
2115 if (!(*cgen)((ast_expression*)(self->owner), func, false, &vec))
2118 if (vec->vtype != TYPE_VECTOR &&
2119 !(vec->vtype == TYPE_FIELD && self->owner->expression.next->expression.vtype == TYPE_VECTOR))
2124 *out = ir_value_vector_member(vec, self->field);
2125 self->expression.outl = *out;
2127 return (*out != NULL);
2130 bool ast_array_index_codegen(ast_array_index *self, ast_function *func, bool lvalue, ir_value **out)
2135 if (!lvalue && self->expression.outr) {
2136 *out = self->expression.outr;
2138 if (lvalue && self->expression.outl) {
2139 *out = self->expression.outl;
2142 if (!ast_istype(self->array, ast_value)) {
2143 compile_error(ast_ctx(self), "array indexing this way is not supported");
2144 /* note this would actually be pointer indexing because the left side is
2145 * not an actual array but (hopefully) an indexable expression.
2146 * Once we get integer arithmetic, and GADDRESS/GSTORE/GLOAD instruction
2147 * support this path will be filled.
2152 arr = (ast_value*)self->array;
2153 idx = (ast_value*)self->index;
2155 if (!ast_istype(self->index, ast_value) || !idx->hasvalue || idx->cvq != CV_CONST) {
2156 /* Time to use accessor functions */
2157 ast_expression_codegen *cgen;
2158 ir_value *iridx, *funval;
2162 compile_error(ast_ctx(self), "(.2) array indexing here needs a compile-time constant");
2167 compile_error(ast_ctx(self), "value has no getter, don't know how to index it");
2171 cgen = self->index->expression.codegen;
2172 if (!(*cgen)((ast_expression*)(self->index), func, false, &iridx))
2175 cgen = arr->getter->expression.codegen;
2176 if (!(*cgen)((ast_expression*)(arr->getter), func, true, &funval))
2179 call = ir_block_create_call(func->curblock, ast_ctx(self), ast_function_label(func, "fetch"), funval, false);
2182 ir_call_param(call, iridx);
2184 *out = ir_call_value(call);
2185 self->expression.outr = *out;
2189 if (idx->expression.vtype == TYPE_FLOAT) {
2190 unsigned int arridx = idx->constval.vfloat;
2191 if (arridx >= self->array->expression.count)
2193 compile_error(ast_ctx(self), "array index out of bounds: %i", arridx);
2196 *out = arr->ir_values[arridx];
2198 else if (idx->expression.vtype == TYPE_INTEGER) {
2199 unsigned int arridx = idx->constval.vint;
2200 if (arridx >= self->array->expression.count)
2202 compile_error(ast_ctx(self), "array index out of bounds: %i", arridx);
2205 *out = arr->ir_values[arridx];
2208 compile_error(ast_ctx(self), "array indexing here needs an integer constant");
2214 bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_value **out)
2216 ast_expression_codegen *cgen;
2224 ir_block *ontrue_endblock = NULL;
2225 ir_block *onfalse_endblock = NULL;
2226 ir_block *merge = NULL;
2228 /* We don't output any value, thus also don't care about r/lvalue */
2232 if (self->expression.outr) {
2233 compile_error(ast_ctx(self), "internal error: ast_ifthen cannot be reused, it bears no result!");
2236 self->expression.outr = (ir_value*)1;
2238 /* generate the condition */
2239 cgen = self->cond->expression.codegen;
2240 if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
2242 /* update the block which will get the jump - because short-logic or ternaries may have changed this */
2243 cond = func->curblock;
2247 if (self->on_true) {
2248 /* create on-true block */
2249 ontrue = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "ontrue"));
2253 /* enter the block */
2254 func->curblock = ontrue;
2257 cgen = self->on_true->expression.codegen;
2258 if (!(*cgen)((ast_expression*)(self->on_true), func, false, &dummy))
2261 /* we now need to work from the current endpoint */
2262 ontrue_endblock = func->curblock;
2267 if (self->on_false) {
2268 /* create on-false block */
2269 onfalse = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "onfalse"));
2273 /* enter the block */
2274 func->curblock = onfalse;
2277 cgen = self->on_false->expression.codegen;
2278 if (!(*cgen)((ast_expression*)(self->on_false), func, false, &dummy))
2281 /* we now need to work from the current endpoint */
2282 onfalse_endblock = func->curblock;
2286 /* Merge block were they all merge in to */
2287 if (!ontrue || !onfalse || !ontrue_endblock->final || !onfalse_endblock->final)
2289 merge = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "endif"));
2292 /* add jumps ot the merge block */
2293 if (ontrue && !ontrue_endblock->final && !ir_block_create_jump(ontrue_endblock, ast_ctx(self), merge))
2295 if (onfalse && !onfalse_endblock->final && !ir_block_create_jump(onfalse_endblock, ast_ctx(self), merge))
2298 /* Now enter the merge block */
2299 func->curblock = merge;
2302 /* we create the if here, that way all blocks are ordered :)
2304 if (!ir_block_create_if(cond, ast_ctx(self), condval,
2305 (ontrue ? ontrue : merge),
2306 (onfalse ? onfalse : merge)))
2314 bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_value **out)
2316 ast_expression_codegen *cgen;
2319 ir_value *trueval, *falseval;
2322 ir_block *cond = func->curblock;
2323 ir_block *cond_out = NULL;
2324 ir_block *ontrue, *ontrue_out = NULL;
2325 ir_block *onfalse, *onfalse_out = NULL;
2328 /* Ternary can never create an lvalue... */
2332 /* In theory it shouldn't be possible to pass through a node twice, but
2333 * in case we add any kind of optimization pass for the AST itself, it
2334 * may still happen, thus we remember a created ir_value and simply return one
2335 * if it already exists.
2337 if (self->expression.outr) {
2338 *out = self->expression.outr;
2342 /* In the following, contraty to ast_ifthen, we assume both paths exist. */
2344 /* generate the condition */
2345 func->curblock = cond;
2346 cgen = self->cond->expression.codegen;
2347 if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
2349 cond_out = func->curblock;
2351 /* create on-true block */
2352 ontrue = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "tern_T"));
2357 /* enter the block */
2358 func->curblock = ontrue;
2361 cgen = self->on_true->expression.codegen;
2362 if (!(*cgen)((ast_expression*)(self->on_true), func, false, &trueval))
2365 ontrue_out = func->curblock;
2368 /* create on-false block */
2369 onfalse = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "tern_F"));
2374 /* enter the block */
2375 func->curblock = onfalse;
2378 cgen = self->on_false->expression.codegen;
2379 if (!(*cgen)((ast_expression*)(self->on_false), func, false, &falseval))
2382 onfalse_out = func->curblock;
2385 /* create merge block */
2386 merge = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "tern_out"));
2389 /* jump to merge block */
2390 if (!ir_block_create_jump(ontrue_out, ast_ctx(self), merge))
2392 if (!ir_block_create_jump(onfalse_out, ast_ctx(self), merge))
2395 /* create if instruction */
2396 if (!ir_block_create_if(cond_out, ast_ctx(self), condval, ontrue, onfalse))
2399 /* Now enter the merge block */
2400 func->curblock = merge;
2402 /* Here, now, we need a PHI node
2403 * but first some sanity checking...
2405 if (trueval->vtype != falseval->vtype && trueval->vtype != TYPE_NIL && falseval->vtype != TYPE_NIL) {
2406 /* error("ternary with different types on the two sides"); */
2407 compile_error(ast_ctx(self), "internal error: ternary operand types invalid");
2412 phi = ir_block_create_phi(merge, ast_ctx(self), ast_function_label(func, "phi"), self->expression.vtype);
2414 compile_error(ast_ctx(self), "internal error: failed to generate phi node");
2417 ir_phi_add(phi, ontrue_out, trueval);
2418 ir_phi_add(phi, onfalse_out, falseval);
2420 self->expression.outr = ir_phi_value(phi);
2421 *out = self->expression.outr;
2423 codegen_output_type(self, *out);
2428 bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value **out)
2430 ast_expression_codegen *cgen;
2432 ir_value *dummy = NULL;
2433 ir_value *precond = NULL;
2434 ir_value *postcond = NULL;
2436 /* Since we insert some jumps "late" so we have blocks
2437 * ordered "nicely", we need to keep track of the actual end-blocks
2438 * of expressions to add the jumps to.
2440 ir_block *bbody = NULL, *end_bbody = NULL;
2441 ir_block *bprecond = NULL, *end_bprecond = NULL;
2442 ir_block *bpostcond = NULL, *end_bpostcond = NULL;
2443 ir_block *bincrement = NULL, *end_bincrement = NULL;
2444 ir_block *bout = NULL, *bin = NULL;
2446 /* let's at least move the outgoing block to the end */
2449 /* 'break' and 'continue' need to be able to find the right blocks */
2450 ir_block *bcontinue = NULL;
2451 ir_block *bbreak = NULL;
2453 ir_block *tmpblock = NULL;
2458 if (self->expression.outr) {
2459 compile_error(ast_ctx(self), "internal error: ast_loop cannot be reused, it bears no result!");
2462 self->expression.outr = (ir_value*)1;
2465 * Should we ever need some kind of block ordering, better make this function
2466 * move blocks around than write a block ordering algorithm later... after all
2467 * the ast and ir should work together, not against each other.
2470 /* initexpr doesn't get its own block, it's pointless, it could create more blocks
2471 * anyway if for example it contains a ternary.
2475 cgen = self->initexpr->expression.codegen;
2476 if (!(*cgen)((ast_expression*)(self->initexpr), func, false, &dummy))
2480 /* Store the block from which we enter this chaos */
2481 bin = func->curblock;
2483 /* The pre-loop condition needs its own block since we
2484 * need to be able to jump to the start of that expression.
2488 bprecond = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "pre_loop_cond"));
2492 /* the pre-loop-condition the least important place to 'continue' at */
2493 bcontinue = bprecond;
2496 func->curblock = bprecond;
2499 cgen = self->precond->expression.codegen;
2500 if (!(*cgen)((ast_expression*)(self->precond), func, false, &precond))
2503 end_bprecond = func->curblock;
2505 bprecond = end_bprecond = NULL;
2508 /* Now the next blocks won't be ordered nicely, but we need to
2509 * generate them this early for 'break' and 'continue'.
2511 if (self->increment) {
2512 bincrement = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "loop_increment"));
2515 bcontinue = bincrement; /* increment comes before the pre-loop-condition */
2517 bincrement = end_bincrement = NULL;
2520 if (self->postcond) {
2521 bpostcond = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "post_loop_cond"));
2524 bcontinue = bpostcond; /* postcond comes before the increment */
2526 bpostcond = end_bpostcond = NULL;
2529 bout_id = vec_size(func->ir_func->blocks);
2530 bout = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "after_loop"));
2535 /* The loop body... */
2536 /* if (self->body) */
2538 bbody = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "loop_body"));
2543 func->curblock = bbody;
2545 vec_push(func->breakblocks, bbreak);
2547 vec_push(func->continueblocks, bcontinue);
2549 vec_push(func->continueblocks, bbody);
2553 cgen = self->body->expression.codegen;
2554 if (!(*cgen)((ast_expression*)(self->body), func, false, &dummy))
2558 end_bbody = func->curblock;
2559 vec_pop(func->breakblocks);
2560 vec_pop(func->continueblocks);
2563 /* post-loop-condition */
2567 func->curblock = bpostcond;
2570 cgen = self->postcond->expression.codegen;
2571 if (!(*cgen)((ast_expression*)(self->postcond), func, false, &postcond))
2574 end_bpostcond = func->curblock;
2577 /* The incrementor */
2578 if (self->increment)
2581 func->curblock = bincrement;
2584 cgen = self->increment->expression.codegen;
2585 if (!(*cgen)((ast_expression*)(self->increment), func, false, &dummy))
2588 end_bincrement = func->curblock;
2591 /* In any case now, we continue from the outgoing block */
2592 func->curblock = bout;
2594 /* Now all blocks are in place */
2595 /* From 'bin' we jump to whatever comes first */
2596 if (bprecond) tmpblock = bprecond;
2597 else if (bbody) tmpblock = bbody;
2598 else if (bpostcond) tmpblock = bpostcond;
2599 else tmpblock = bout;
2600 if (!ir_block_create_jump(bin, ast_ctx(self), tmpblock))
2606 ir_block *ontrue, *onfalse;
2607 if (bbody) ontrue = bbody;
2608 else if (bincrement) ontrue = bincrement;
2609 else if (bpostcond) ontrue = bpostcond;
2610 else ontrue = bprecond;
2612 if (self->pre_not) {
2617 if (!ir_block_create_if(end_bprecond, ast_ctx(self), precond, ontrue, onfalse))
2624 if (bincrement) tmpblock = bincrement;
2625 else if (bpostcond) tmpblock = bpostcond;
2626 else if (bprecond) tmpblock = bprecond;
2627 else tmpblock = bbody;
2628 if (!end_bbody->final && !ir_block_create_jump(end_bbody, ast_ctx(self), tmpblock))
2632 /* from increment */
2635 if (bpostcond) tmpblock = bpostcond;
2636 else if (bprecond) tmpblock = bprecond;
2637 else if (bbody) tmpblock = bbody;
2638 else tmpblock = bout;
2639 if (!ir_block_create_jump(end_bincrement, ast_ctx(self), tmpblock))
2646 ir_block *ontrue, *onfalse;
2647 if (bprecond) ontrue = bprecond;
2648 else if (bbody) ontrue = bbody;
2649 else if (bincrement) ontrue = bincrement;
2650 else ontrue = bpostcond;
2652 if (self->post_not) {
2657 if (!ir_block_create_if(end_bpostcond, ast_ctx(self), postcond, ontrue, onfalse))
2661 /* Move 'bout' to the end */
2662 vec_remove(func->ir_func->blocks, bout_id, 1);
2663 vec_push(func->ir_func->blocks, bout);
2668 bool ast_breakcont_codegen(ast_breakcont *self, ast_function *func, bool lvalue, ir_value **out)
2675 compile_error(ast_ctx(self), "break/continue expression is not an l-value");
2679 if (self->expression.outr) {
2680 compile_error(ast_ctx(self), "internal error: ast_breakcont cannot be reused!");
2683 self->expression.outr = (ir_value*)1;
2685 if (self->is_continue)
2686 target = func->continueblocks[vec_size(func->continueblocks)-1-self->levels];
2688 target = func->breakblocks[vec_size(func->breakblocks)-1-self->levels];
2691 compile_error(ast_ctx(self), "%s is lacking a target block", (self->is_continue ? "continue" : "break"));
2695 if (!ir_block_create_jump(func->curblock, ast_ctx(self), target))
2700 bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_value **out)
2702 ast_expression_codegen *cgen;
2704 ast_switch_case *def_case = NULL;
2705 ir_block *def_bfall = NULL;
2706 ir_block *def_bfall_to = NULL;
2707 bool set_def_bfall_to = false;
2709 ir_value *dummy = NULL;
2710 ir_value *irop = NULL;
2711 ir_block *bout = NULL;
2712 ir_block *bfall = NULL;
2720 compile_error(ast_ctx(self), "switch expression is not an l-value");
2724 if (self->expression.outr) {
2725 compile_error(ast_ctx(self), "internal error: ast_switch cannot be reused!");
2728 self->expression.outr = (ir_value*)1;
2733 cgen = self->operand->expression.codegen;
2734 if (!(*cgen)((ast_expression*)(self->operand), func, false, &irop))
2737 if (!vec_size(self->cases))
2740 cmpinstr = type_eq_instr[irop->vtype];
2741 if (cmpinstr >= AINSTR_END) {
2742 ast_type_to_string(self->operand, typestr, sizeof(typestr));
2743 compile_error(ast_ctx(self), "invalid type to perform a switch on: %s", typestr);
2747 bout_id = vec_size(func->ir_func->blocks);
2748 bout = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "after_switch"));
2752 /* setup the break block */
2753 vec_push(func->breakblocks, bout);
2755 /* Now create all cases */
2756 for (c = 0; c < vec_size(self->cases); ++c) {
2757 ir_value *cond, *val;
2758 ir_block *bcase, *bnot;
2761 ast_switch_case *swcase = &self->cases[c];
2763 if (swcase->value) {
2764 /* A regular case */
2765 /* generate the condition operand */
2766 cgen = swcase->value->expression.codegen;
2767 if (!(*cgen)((ast_expression*)(swcase->value), func, false, &val))
2769 /* generate the condition */
2770 cond = ir_block_create_binop(func->curblock, ast_ctx(self), ast_function_label(func, "switch_eq"), cmpinstr, irop, val);
2774 bcase = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "case"));
2775 bnot_id = vec_size(func->ir_func->blocks);
2776 bnot = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "not_case"));
2777 if (!bcase || !bnot)
2779 if (set_def_bfall_to) {
2780 set_def_bfall_to = false;
2781 def_bfall_to = bcase;
2783 if (!ir_block_create_if(func->curblock, ast_ctx(self), cond, bcase, bnot))
2786 /* Make the previous case-end fall through */
2787 if (bfall && !bfall->final) {
2788 if (!ir_block_create_jump(bfall, ast_ctx(self), bcase))
2792 /* enter the case */
2793 func->curblock = bcase;
2794 cgen = swcase->code->expression.codegen;
2795 if (!(*cgen)((ast_expression*)swcase->code, func, false, &dummy))
2798 /* remember this block to fall through from */
2799 bfall = func->curblock;
2801 /* enter the else and move it down */
2802 func->curblock = bnot;
2803 vec_remove(func->ir_func->blocks, bnot_id, 1);
2804 vec_push(func->ir_func->blocks, bnot);
2806 /* The default case */
2807 /* Remember where to fall through from: */
2810 /* remember which case it was */
2812 /* And the next case will be remembered */
2813 set_def_bfall_to = true;
2817 /* Jump from the last bnot to bout */
2818 if (bfall && !bfall->final && !ir_block_create_jump(bfall, ast_ctx(self), bout)) {
2820 astwarning(ast_ctx(bfall), WARN_???, "missing break after last case");
2825 /* If there was a default case, put it down here */
2829 /* No need to create an extra block */
2830 bcase = func->curblock;
2832 /* Insert the fallthrough jump */
2833 if (def_bfall && !def_bfall->final) {
2834 if (!ir_block_create_jump(def_bfall, ast_ctx(self), bcase))
2838 /* Now generate the default code */
2839 cgen = def_case->code->expression.codegen;
2840 if (!(*cgen)((ast_expression*)def_case->code, func, false, &dummy))
2843 /* see if we need to fall through */
2844 if (def_bfall_to && !func->curblock->final)
2846 if (!ir_block_create_jump(func->curblock, ast_ctx(self), def_bfall_to))
2851 /* Jump from the last bnot to bout */
2852 if (!func->curblock->final && !ir_block_create_jump(func->curblock, ast_ctx(self), bout))
2854 /* enter the outgoing block */
2855 func->curblock = bout;
2857 /* restore the break block */
2858 vec_pop(func->breakblocks);
2860 /* Move 'bout' to the end, it's nicer */
2861 vec_remove(func->ir_func->blocks, bout_id, 1);
2862 vec_push(func->ir_func->blocks, bout);
2867 bool ast_label_codegen(ast_label *self, ast_function *func, bool lvalue, ir_value **out)
2872 if (self->undefined) {
2873 compile_error(ast_ctx(self), "internal error: ast_label never defined");
2879 compile_error(ast_ctx(self), "internal error: ast_label cannot be an lvalue");
2883 /* simply create a new block and jump to it */
2884 self->irblock = ir_function_create_block(ast_ctx(self), func->ir_func, self->name);
2885 if (!self->irblock) {
2886 compile_error(ast_ctx(self), "failed to allocate label block `%s`", self->name);
2889 if (!func->curblock->final) {
2890 if (!ir_block_create_jump(func->curblock, ast_ctx(self), self->irblock))
2894 /* enter the new block */
2895 func->curblock = self->irblock;
2897 /* Generate all the leftover gotos */
2898 for (i = 0; i < vec_size(self->gotos); ++i) {
2899 if (!ast_goto_codegen(self->gotos[i], func, false, &dummy))
2906 bool ast_goto_codegen(ast_goto *self, ast_function *func, bool lvalue, ir_value **out)
2910 compile_error(ast_ctx(self), "internal error: ast_goto cannot be an lvalue");
2914 if (self->target->irblock) {
2915 if (self->irblock_from) {
2916 /* we already tried once, this is the callback */
2917 self->irblock_from->final = false;
2918 if (!ir_block_create_goto(self->irblock_from, ast_ctx(self), self->target->irblock)) {
2919 compile_error(ast_ctx(self), "failed to generate goto to `%s`", self->name);
2925 if (!ir_block_create_goto(func->curblock, ast_ctx(self), self->target->irblock)) {
2926 compile_error(ast_ctx(self), "failed to generate goto to `%s`", self->name);
2933 /* the target has not yet been created...
2934 * close this block in a sneaky way:
2936 func->curblock->final = true;
2937 self->irblock_from = func->curblock;
2938 ast_label_register_goto(self->target, self);
2944 bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value **out)
2946 ast_expression_codegen *cgen;
2948 ir_instr *callinstr;
2951 ir_value *funval = NULL;
2953 /* return values are never lvalues */
2955 compile_error(ast_ctx(self), "not an l-value (function call)");
2959 if (self->expression.outr) {
2960 *out = self->expression.outr;
2964 cgen = self->func->expression.codegen;
2965 if (!(*cgen)((ast_expression*)(self->func), func, false, &funval))
2973 for (i = 0; i < vec_size(self->params); ++i)
2976 ast_expression *expr = self->params[i];
2978 cgen = expr->expression.codegen;
2979 if (!(*cgen)(expr, func, false, ¶m))
2983 vec_push(params, param);
2986 callinstr = ir_block_create_call(func->curblock, ast_ctx(self),
2987 ast_function_label(func, "call"),
2988 funval, !!(self->func->expression.flags & AST_FLAG_NORETURN));
2992 for (i = 0; i < vec_size(params); ++i) {
2993 ir_call_param(callinstr, params[i]);
2996 *out = ir_call_value(callinstr);
2997 self->expression.outr = *out;
2999 codegen_output_type(self, *out);