5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
6 * this software and associated documentation files (the "Software"), to deal in
7 * the Software without restriction, including without limitation the rights to
8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is furnished to do
10 * so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in all
13 * copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 #define ast_instantiate(T, ctx, destroyfn) \
31 T* self = (T*)mem_a(sizeof(T)); \
35 ast_node_init((ast_node*)self, ctx, TYPE_##T); \
36 ( (ast_node*)self )->node.destroy = (ast_node_delete*)destroyfn
39 static void asterror(lex_ctx ctx, const char *msg, ...)
43 cvprintmsg(ctx, LVL_ERROR, "error", msg, ap);
47 /* It must not be possible to get here. */
48 static GMQCC_NORETURN void _ast_node_destroy(ast_node *self)
50 fprintf(stderr, "ast node missing destroy()\n");
54 /* Initialize main ast node aprts */
55 static void ast_node_init(ast_node *self, lex_ctx ctx, int nodetype)
57 self->node.context = ctx;
58 self->node.destroy = &_ast_node_destroy;
59 self->node.keep = false;
60 self->node.nodetype = nodetype;
63 /* General expression initialization */
64 static void ast_expression_init(ast_expression *self,
65 ast_expression_codegen *codegen)
67 self->expression.codegen = codegen;
68 self->expression.vtype = TYPE_VOID;
69 self->expression.next = NULL;
70 self->expression.outl = NULL;
71 self->expression.outr = NULL;
72 MEM_VECTOR_INIT(&self->expression, params);
75 static void ast_expression_delete(ast_expression *self)
78 if (self->expression.next)
79 ast_delete(self->expression.next);
80 for (i = 0; i < self->expression.params_count; ++i) {
81 ast_delete(self->expression.params[i]);
83 MEM_VECTOR_CLEAR(&self->expression, params);
86 static void ast_expression_delete_full(ast_expression *self)
88 ast_expression_delete(self);
92 MEM_VEC_FUNCTIONS(ast_expression_common, ast_value*, params)
94 static ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex);
95 ast_value* ast_value_copy(const ast_value *self)
98 const ast_expression_common *fromex;
99 ast_expression_common *selfex;
100 ast_value *cp = ast_value_new(self->expression.node.context, self->name, self->expression.vtype);
101 if (self->expression.next) {
102 cp->expression.next = ast_type_copy(self->expression.node.context, self->expression.next);
103 if (!cp->expression.next) {
104 ast_value_delete(cp);
108 fromex = &self->expression;
109 selfex = &cp->expression;
110 for (i = 0; i < fromex->params_count; ++i) {
111 ast_value *v = ast_value_copy(fromex->params[i]);
112 if (!v || !ast_expression_common_params_add(selfex, v)) {
113 ast_value_delete(cp);
120 static ast_expression* ast_shallow_type(lex_ctx ctx, int vtype)
122 ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
123 ast_expression_init(self, NULL);
124 self->expression.codegen = NULL;
125 self->expression.next = NULL;
126 self->expression.vtype = vtype;
130 static ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
133 const ast_expression_common *fromex;
134 ast_expression_common *selfex;
140 ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
141 ast_expression_init(self, NULL);
143 fromex = &ex->expression;
144 selfex = &self->expression;
146 /* This may never be codegen()d */
147 selfex->codegen = NULL;
149 selfex->vtype = fromex->vtype;
152 selfex->next = ast_type_copy(ctx, fromex->next);
154 ast_expression_delete_full(self);
161 for (i = 0; i < fromex->params_count; ++i) {
162 ast_value *v = ast_value_copy(fromex->params[i]);
163 if (!v || !ast_expression_common_params_add(selfex, v)) {
164 ast_expression_delete_full(self);
173 bool ast_compare_type(ast_expression *a, ast_expression *b)
175 if (a->expression.vtype != b->expression.vtype)
177 if (!a->expression.next != !b->expression.next)
179 if (a->expression.params_count != b->expression.params_count)
181 if (a->expression.params_count) {
183 for (i = 0; i < a->expression.params_count; ++i) {
184 if (!ast_compare_type((ast_expression*)a->expression.params[i],
185 (ast_expression*)b->expression.params[i]))
189 if (a->expression.next)
190 return ast_compare_type(a->expression.next, b->expression.next);
194 ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
196 ast_instantiate(ast_value, ctx, ast_value_delete);
197 ast_expression_init((ast_expression*)self,
198 (ast_expression_codegen*)&ast_value_codegen);
199 self->expression.node.keep = true; /* keep */
201 self->name = name ? util_strdup(name) : NULL;
202 self->expression.vtype = t;
203 self->expression.next = NULL;
204 self->isconst = false;
205 memset(&self->constval, 0, sizeof(self->constval));
212 void ast_value_delete(ast_value* self)
215 mem_d((void*)self->name);
217 switch (self->expression.vtype)
220 mem_d((void*)self->constval.vstring);
223 /* unlink us from the function node */
224 self->constval.vfunc->vtype = NULL;
226 /* NOTE: delete function? currently collected in
227 * the parser structure
233 ast_expression_delete((ast_expression*)self);
237 bool GMQCC_WARN ast_value_params_add(ast_value *self, ast_value *p)
239 return ast_expression_common_params_add(&self->expression, p);
242 bool ast_value_set_name(ast_value *self, const char *name)
245 mem_d((void*)self->name);
246 self->name = util_strdup(name);
250 ast_binary* ast_binary_new(lex_ctx ctx, int op,
251 ast_expression* left, ast_expression* right)
253 ast_instantiate(ast_binary, ctx, ast_binary_delete);
254 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_binary_codegen);
260 if (op >= INSTR_EQ_F && op <= INSTR_GT)
261 self->expression.vtype = TYPE_FLOAT;
262 else if (op == INSTR_AND || op == INSTR_OR ||
263 op == INSTR_BITAND || op == INSTR_BITOR)
264 self->expression.vtype = TYPE_FLOAT;
265 else if (op == INSTR_MUL_VF || op == INSTR_MUL_FV)
266 self->expression.vtype = TYPE_VECTOR;
267 else if (op == INSTR_MUL_V)
268 self->expression.vtype = TYPE_FLOAT;
270 self->expression.vtype = left->expression.vtype;
275 void ast_binary_delete(ast_binary *self)
277 ast_unref(self->left);
278 ast_unref(self->right);
279 ast_expression_delete((ast_expression*)self);
283 ast_binstore* ast_binstore_new(lex_ctx ctx, int storop, int op,
284 ast_expression* left, ast_expression* right)
286 ast_instantiate(ast_binstore, ctx, ast_binstore_delete);
287 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_binstore_codegen);
289 self->opstore = storop;
292 self->source = right;
294 self->expression.vtype = left->expression.vtype;
295 if (left->expression.next) {
296 self->expression.next = ast_type_copy(ctx, left);
297 if (!self->expression.next) {
303 self->expression.next = NULL;
308 void ast_binstore_delete(ast_binstore *self)
310 ast_unref(self->dest);
311 ast_unref(self->source);
312 ast_expression_delete((ast_expression*)self);
316 ast_unary* ast_unary_new(lex_ctx ctx, int op,
317 ast_expression *expr)
319 ast_instantiate(ast_unary, ctx, ast_unary_delete);
320 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_unary_codegen);
323 self->operand = expr;
328 void ast_unary_delete(ast_unary *self)
330 ast_unref(self->operand);
331 ast_expression_delete((ast_expression*)self);
335 ast_return* ast_return_new(lex_ctx ctx, ast_expression *expr)
337 ast_instantiate(ast_return, ctx, ast_return_delete);
338 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_return_codegen);
340 self->operand = expr;
345 void ast_return_delete(ast_return *self)
348 ast_unref(self->operand);
349 ast_expression_delete((ast_expression*)self);
353 ast_entfield* ast_entfield_new(lex_ctx ctx, ast_expression *entity, ast_expression *field)
355 const ast_expression *outtype;
357 ast_instantiate(ast_entfield, ctx, ast_entfield_delete);
359 if (field->expression.vtype != TYPE_FIELD) {
364 outtype = field->expression.next;
367 /* Error: field has no type... */
371 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_entfield_codegen);
373 self->expression.vtype = outtype->expression.vtype;
374 self->expression.next = ast_type_copy(ctx, outtype->expression.next);
376 self->entity = entity;
382 void ast_entfield_delete(ast_entfield *self)
384 ast_unref(self->entity);
385 ast_unref(self->field);
386 ast_expression_delete((ast_expression*)self);
390 ast_member* ast_member_new(lex_ctx ctx, ast_expression *owner, unsigned int field)
392 ast_instantiate(ast_member, ctx, ast_member_delete);
398 if (owner->expression.vtype != TYPE_VECTOR &&
399 owner->expression.vtype != TYPE_FIELD) {
400 asterror(ctx, "member-access on an invalid owner of type %s\n", type_name[owner->expression.vtype]);
405 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_member_codegen);
406 self->expression.node.keep = true; /* keep */
408 if (owner->expression.vtype == TYPE_VECTOR) {
409 self->expression.vtype = TYPE_FLOAT;
410 self->expression.next = NULL;
412 self->expression.vtype = TYPE_FIELD;
413 self->expression.next = ast_shallow_type(ctx, TYPE_FLOAT);
422 void ast_member_delete(ast_member *self)
424 /* The owner is always an ast_value, which has .keep=true,
425 * also: ast_members are usually deleted after the owner, thus
426 * this will cause invalid access
427 ast_unref(self->owner);
428 * once we allow (expression).x to access a vector-member, we need
429 * to change this: preferably by creating an alternate ast node for this
430 * purpose that is not garbage-collected.
432 ast_expression_delete((ast_expression*)self);
436 ast_ifthen* ast_ifthen_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
438 ast_instantiate(ast_ifthen, ctx, ast_ifthen_delete);
439 if (!ontrue && !onfalse) {
440 /* because it is invalid */
444 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_ifthen_codegen);
447 self->on_true = ontrue;
448 self->on_false = onfalse;
453 void ast_ifthen_delete(ast_ifthen *self)
455 ast_unref(self->cond);
457 ast_unref(self->on_true);
459 ast_unref(self->on_false);
460 ast_expression_delete((ast_expression*)self);
464 ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
466 ast_instantiate(ast_ternary, ctx, ast_ternary_delete);
467 /* This time NEITHER must be NULL */
468 if (!ontrue || !onfalse) {
472 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_ternary_codegen);
475 self->on_true = ontrue;
476 self->on_false = onfalse;
477 self->phi_out = NULL;
482 void ast_ternary_delete(ast_ternary *self)
484 ast_unref(self->cond);
485 ast_unref(self->on_true);
486 ast_unref(self->on_false);
487 ast_expression_delete((ast_expression*)self);
491 ast_loop* ast_loop_new(lex_ctx ctx,
492 ast_expression *initexpr,
493 ast_expression *precond,
494 ast_expression *postcond,
495 ast_expression *increment,
496 ast_expression *body)
498 ast_instantiate(ast_loop, ctx, ast_loop_delete);
499 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_loop_codegen);
501 self->initexpr = initexpr;
502 self->precond = precond;
503 self->postcond = postcond;
504 self->increment = increment;
510 void ast_loop_delete(ast_loop *self)
513 ast_unref(self->initexpr);
515 ast_unref(self->precond);
517 ast_unref(self->postcond);
519 ast_unref(self->increment);
521 ast_unref(self->body);
522 ast_expression_delete((ast_expression*)self);
526 ast_call* ast_call_new(lex_ctx ctx,
527 ast_expression *funcexpr)
529 ast_instantiate(ast_call, ctx, ast_call_delete);
530 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_call_codegen);
532 MEM_VECTOR_INIT(self, params);
534 self->func = funcexpr;
536 self->expression.vtype = funcexpr->expression.next->expression.vtype;
537 if (funcexpr->expression.next->expression.next)
538 self->expression.next = ast_type_copy(ctx, funcexpr->expression.next->expression.next);
542 MEM_VEC_FUNCTIONS(ast_call, ast_expression*, params)
544 void ast_call_delete(ast_call *self)
547 for (i = 0; i < self->params_count; ++i)
548 ast_unref(self->params[i]);
549 MEM_VECTOR_CLEAR(self, params);
552 ast_unref(self->func);
554 ast_expression_delete((ast_expression*)self);
558 ast_store* ast_store_new(lex_ctx ctx, int op,
559 ast_expression *dest, ast_expression *source)
561 ast_instantiate(ast_store, ctx, ast_store_delete);
562 ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_store_codegen);
566 self->source = source;
571 void ast_store_delete(ast_store *self)
573 ast_unref(self->dest);
574 ast_unref(self->source);
575 ast_expression_delete((ast_expression*)self);
579 ast_block* ast_block_new(lex_ctx ctx)
581 ast_instantiate(ast_block, ctx, ast_block_delete);
582 ast_expression_init((ast_expression*)self,
583 (ast_expression_codegen*)&ast_block_codegen);
585 MEM_VECTOR_INIT(self, locals);
586 MEM_VECTOR_INIT(self, exprs);
587 MEM_VECTOR_INIT(self, collect);
591 MEM_VEC_FUNCTIONS(ast_block, ast_value*, locals)
592 MEM_VEC_FUNCTIONS(ast_block, ast_expression*, exprs)
593 MEM_VEC_FUNCTIONS(ast_block, ast_expression*, collect)
595 bool ast_block_collect(ast_block *self, ast_expression *expr)
597 if (!ast_block_collect_add(self, expr))
599 expr->expression.node.keep = true;
603 void ast_block_delete(ast_block *self)
606 for (i = 0; i < self->exprs_count; ++i)
607 ast_unref(self->exprs[i]);
608 MEM_VECTOR_CLEAR(self, exprs);
609 for (i = 0; i < self->locals_count; ++i)
610 ast_delete(self->locals[i]);
611 MEM_VECTOR_CLEAR(self, locals);
612 for (i = 0; i < self->collect_count; ++i)
613 ast_delete(self->collect[i]);
614 MEM_VECTOR_CLEAR(self, collect);
615 ast_expression_delete((ast_expression*)self);
619 bool ast_block_set_type(ast_block *self, ast_expression *from)
621 if (self->expression.next)
622 ast_delete(self->expression.next);
623 self->expression.vtype = from->expression.vtype;
624 if (from->expression.next) {
625 self->expression.next = ast_type_copy(self->expression.node.context, from->expression.next);
626 if (!self->expression.next)
630 self->expression.next = NULL;
634 ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
636 ast_instantiate(ast_function, ctx, ast_function_delete);
640 vtype->expression.vtype != TYPE_FUNCTION)
647 self->name = name ? util_strdup(name) : NULL;
648 MEM_VECTOR_INIT(self, blocks);
650 self->labelcount = 0;
653 self->ir_func = NULL;
654 self->curblock = NULL;
656 self->breakblock = NULL;
657 self->continueblock = NULL;
659 vtype->isconst = true;
660 vtype->constval.vfunc = self;
665 MEM_VEC_FUNCTIONS(ast_function, ast_block*, blocks)
667 void ast_function_delete(ast_function *self)
671 mem_d((void*)self->name);
673 /* ast_value_delete(self->vtype); */
674 self->vtype->isconst = false;
675 self->vtype->constval.vfunc = NULL;
676 /* We use unref - if it was stored in a global table it is supposed
677 * to be deleted from *there*
679 ast_unref(self->vtype);
681 for (i = 0; i < self->blocks_count; ++i)
682 ast_delete(self->blocks[i]);
683 MEM_VECTOR_CLEAR(self, blocks);
687 static void ast_util_hexitoa(char *buf, size_t size, unsigned int num)
689 unsigned int base = 10;
690 #define checknul() do { if (size == 1) { *buf = 0; return; } } while (0)
691 #define addch(x) do { *buf++ = (x); --size; checknul(); } while (0)
700 int digit = num % base;
711 const char* ast_function_label(ast_function *self, const char *prefix)
713 size_t id = (self->labelcount++);
714 size_t len = strlen(prefix);
715 strncpy(self->labelbuf, prefix, sizeof(self->labelbuf));
716 ast_util_hexitoa(self->labelbuf + len, sizeof(self->labelbuf)-len, id);
717 return self->labelbuf;
720 /*********************************************************************/
722 * by convention you must never pass NULL to the 'ir_value **out'
723 * parameter. If you really don't care about the output, pass a dummy.
724 * But I can't imagine a pituation where the output is truly unnecessary.
727 bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_value **out)
729 /* NOTE: This is the codegen for a variable used in an expression.
730 * It is not the codegen to generate the value. For this purpose,
731 * ast_local_codegen and ast_global_codegen are to be used before this
732 * is executed. ast_function_codegen should take care of its locals,
733 * and the ast-user should take care of ast_global_codegen to be used
734 * on all the globals.
737 asterror(ast_ctx(self), "ast_value used before generated (%s)\n", self->name);
744 bool ast_global_codegen(ast_value *self, ir_builder *ir)
747 if (self->isconst && self->expression.vtype == TYPE_FUNCTION)
749 ir_function *func = ir_builder_create_function(ir, self->name, self->expression.next->expression.vtype);
753 self->constval.vfunc->ir_func = func;
754 self->ir_v = func->value;
755 /* The function is filled later on ast_function_codegen... */
759 if (self->expression.vtype == TYPE_FIELD) {
760 v = ir_builder_create_field(ir, self->name, self->expression.next->expression.vtype);
764 asterror(ast_ctx(self), "TODO: constant field pointers with value\n");
771 v = ir_builder_create_global(ir, self->name, self->expression.vtype);
773 asterror(ast_ctx(self), "ir_builder_create_global failed\n");
778 switch (self->expression.vtype)
781 if (!ir_value_set_float(v, self->constval.vfloat))
785 if (!ir_value_set_vector(v, self->constval.vvec))
789 if (!ir_value_set_string(v, self->constval.vstring))
793 asterror(ast_ctx(self), "global of type function not properly generated\n");
795 /* Cannot generate an IR value for a function,
796 * need a pointer pointing to a function rather.
799 asterror(ast_ctx(self), "TODO: global constant type %i\n", self->expression.vtype);
804 /* link us to the ir_value */
808 error: /* clean up */
813 bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
816 if (self->isconst && self->expression.vtype == TYPE_FUNCTION)
818 /* Do we allow local functions? I think not...
819 * this is NOT a function pointer atm.
824 v = ir_function_create_local(func, self->name, self->expression.vtype, param);
828 /* A constant local... hmmm...
829 * I suppose the IR will have to deal with this
832 switch (self->expression.vtype)
835 if (!ir_value_set_float(v, self->constval.vfloat))
839 if (!ir_value_set_vector(v, self->constval.vvec))
843 if (!ir_value_set_string(v, self->constval.vstring))
847 asterror(ast_ctx(self), "TODO: global constant type %i\n", self->expression.vtype);
852 /* link us to the ir_value */
856 error: /* clean up */
861 bool ast_function_codegen(ast_function *self, ir_builder *ir)
865 ast_expression_common *ec;
870 asterror(ast_ctx(self), "ast_function's related ast_value was not generated yet\n");
874 /* fill the parameter list */
875 ec = &self->vtype->expression;
876 for (i = 0; i < ec->params_count; ++i)
878 if (!ir_function_params_add(irf, ec->params[i]->expression.vtype))
880 if (!self->builtin) {
881 if (!ast_local_codegen(ec->params[i], self->ir_func, true))
887 irf->builtin = self->builtin;
891 if (!self->blocks_count) {
892 asterror(ast_ctx(self), "function `%s` has no body", self->name);
896 self->curblock = ir_function_create_block(irf, "entry");
900 for (i = 0; i < self->blocks_count; ++i) {
901 ast_expression_codegen *gen = self->blocks[i]->expression.codegen;
902 if (!(*gen)((ast_expression*)self->blocks[i], self, false, &dummy))
906 /* TODO: check return types */
907 if (!self->curblock->is_return)
909 if (!self->vtype->expression.next ||
910 self->vtype->expression.next->expression.vtype == TYPE_VOID)
912 return ir_block_create_return(self->curblock, NULL);
916 /* error("missing return"); */
917 asterror(ast_ctx(self), "function `%s` missing return value", self->name);
924 /* Note, you will not see ast_block_codegen generate ir_blocks.
925 * To the AST and the IR, blocks are 2 different things.
926 * In the AST it represents a block of code, usually enclosed in
927 * curly braces {...}.
928 * While in the IR it represents a block in terms of control-flow.
930 bool ast_block_codegen(ast_block *self, ast_function *func, bool lvalue, ir_value **out)
935 * Note: an ast-representation using the comma-operator
936 * of the form: (a, b, c) = x should not assign to c...
939 if (self->expression.outr) {
940 *out = self->expression.outr;
944 /* output is NULL at first, we'll have each expression
945 * assign to out output, thus, a comma-operator represention
946 * using an ast_block will return the last generated value,
947 * so: (b, c) + a executed both b and c, and returns c,
948 * which is then added to a.
952 /* generate locals */
953 for (i = 0; i < self->locals_count; ++i)
955 if (!ast_local_codegen(self->locals[i], func->ir_func, false))
959 for (i = 0; i < self->exprs_count; ++i)
961 ast_expression_codegen *gen = self->exprs[i]->expression.codegen;
962 if (!(*gen)(self->exprs[i], func, false, out))
966 self->expression.outr = *out;
971 bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_value **out)
973 ast_expression_codegen *cgen;
974 ir_value *left, *right;
976 if (lvalue && self->expression.outl) {
977 *out = self->expression.outl;
981 if (!lvalue && self->expression.outr) {
982 *out = self->expression.outr;
986 cgen = self->dest->expression.codegen;
988 if (!(*cgen)((ast_expression*)(self->dest), func, true, &left))
990 self->expression.outl = left;
992 cgen = self->source->expression.codegen;
994 if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
997 if (!ir_block_create_store_op(func->curblock, self->op, left, right))
999 self->expression.outr = right;
1001 /* Theoretically, an assinment returns its left side as an
1002 * lvalue, if we don't need an lvalue though, we return
1003 * the right side as an rvalue, otherwise we have to
1004 * somehow know whether or not we need to dereference the pointer
1005 * on the left side - that is: OP_LOAD if it was an address.
1006 * Also: in original QC we cannot OP_LOADP *anyway*.
1008 *out = (lvalue ? left : right);
1013 bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_value **out)
1015 ast_expression_codegen *cgen;
1016 ir_value *left, *right;
1018 /* In the context of a binary operation, we can disregard
1022 if (self->expression.outr) {
1023 *out = self->expression.outr;
1027 cgen = self->left->expression.codegen;
1029 if (!(*cgen)((ast_expression*)(self->left), func, false, &left))
1032 cgen = self->right->expression.codegen;
1034 if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
1037 *out = ir_block_create_binop(func->curblock, ast_function_label(func, "bin"),
1038 self->op, left, right);
1041 self->expression.outr = *out;
1046 bool ast_binstore_codegen(ast_binstore *self, ast_function *func, bool lvalue, ir_value **out)
1048 ast_expression_codegen *cgen;
1049 ir_value *leftl, *leftr, *right, *bin;
1051 if (lvalue && self->expression.outl) {
1052 *out = self->expression.outl;
1056 if (!lvalue && self->expression.outr) {
1057 *out = self->expression.outr;
1061 /* for a binstore we need both an lvalue and an rvalue for the left side */
1062 /* rvalue of destination! */
1063 cgen = self->dest->expression.codegen;
1064 if (!(*cgen)((ast_expression*)(self->dest), func, false, &leftr))
1067 /* source as rvalue only */
1068 cgen = self->source->expression.codegen;
1069 if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
1072 /* now the binary */
1073 bin = ir_block_create_binop(func->curblock, ast_function_label(func, "binst"),
1074 self->opbin, leftr, right);
1075 self->expression.outr = bin;
1077 /* now store them */
1078 cgen = self->dest->expression.codegen;
1079 /* lvalue of destination */
1080 if (!(*cgen)((ast_expression*)(self->dest), func, true, &leftl))
1082 self->expression.outl = leftl;
1084 if (!ir_block_create_store_op(func->curblock, self->opstore, leftl, bin))
1086 self->expression.outr = bin;
1088 /* Theoretically, an assinment returns its left side as an
1089 * lvalue, if we don't need an lvalue though, we return
1090 * the right side as an rvalue, otherwise we have to
1091 * somehow know whether or not we need to dereference the pointer
1092 * on the left side - that is: OP_LOAD if it was an address.
1093 * Also: in original QC we cannot OP_LOADP *anyway*.
1095 *out = (lvalue ? leftl : bin);
1100 bool ast_unary_codegen(ast_unary *self, ast_function *func, bool lvalue, ir_value **out)
1102 ast_expression_codegen *cgen;
1105 /* In the context of a unary operation, we can disregard
1109 if (self->expression.outr) {
1110 *out = self->expression.outr;
1114 cgen = self->operand->expression.codegen;
1116 if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
1119 *out = ir_block_create_unary(func->curblock, ast_function_label(func, "unary"),
1123 self->expression.outr = *out;
1128 bool ast_return_codegen(ast_return *self, ast_function *func, bool lvalue, ir_value **out)
1130 ast_expression_codegen *cgen;
1133 /* In the context of a return operation, we can disregard
1137 if (self->expression.outr) {
1138 asterror(ast_ctx(self), "internal error: ast_return cannot be reused, it bears no result!\n");
1141 self->expression.outr = (ir_value*)1;
1143 if (self->operand) {
1144 cgen = self->operand->expression.codegen;
1146 if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
1149 if (!ir_block_create_return(func->curblock, operand))
1152 if (!ir_block_create_return(func->curblock, NULL))
1159 bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, ir_value **out)
1161 ast_expression_codegen *cgen;
1162 ir_value *ent, *field;
1164 /* This function needs to take the 'lvalue' flag into account!
1165 * As lvalue we provide a field-pointer, as rvalue we provide the
1169 if (lvalue && self->expression.outl) {
1170 *out = self->expression.outl;
1174 if (!lvalue && self->expression.outr) {
1175 *out = self->expression.outr;
1179 cgen = self->entity->expression.codegen;
1180 if (!(*cgen)((ast_expression*)(self->entity), func, false, &ent))
1183 cgen = self->field->expression.codegen;
1184 if (!(*cgen)((ast_expression*)(self->field), func, false, &field))
1189 *out = ir_block_create_fieldaddress(func->curblock, ast_function_label(func, "efa"),
1192 *out = ir_block_create_load_from_ent(func->curblock, ast_function_label(func, "efv"),
1193 ent, field, self->expression.vtype);
1196 asterror(ast_ctx(self), "failed to create %s instruction (output type %s)",
1197 (lvalue ? "ADDRESS" : "FIELD"),
1198 type_name[self->expression.vtype]);
1203 self->expression.outl = *out;
1205 self->expression.outr = *out;
1207 /* Hm that should be it... */
1211 bool ast_member_codegen(ast_member *self, ast_function *func, bool lvalue, ir_value **out)
1213 ast_expression_codegen *cgen;
1216 /* in QC this is always an lvalue */
1218 if (self->expression.outl) {
1219 *out = self->expression.outl;
1223 cgen = self->owner->expression.codegen;
1224 if (!(*cgen)((ast_expression*)(self->owner), func, true, &vec))
1227 if (vec->vtype != TYPE_VECTOR &&
1228 !(vec->vtype == TYPE_FIELD && self->owner->expression.next->expression.vtype == TYPE_VECTOR))
1233 *out = ir_value_vector_member(vec, self->field);
1234 self->expression.outl = *out;
1236 return (*out != NULL);
1239 bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_value **out)
1241 ast_expression_codegen *cgen;
1246 ir_block *cond = func->curblock;
1251 /* We don't output any value, thus also don't care about r/lvalue */
1255 if (self->expression.outr) {
1256 asterror(ast_ctx(self), "internal error: ast_ifthen cannot be reused, it bears no result!\n");
1259 self->expression.outr = (ir_value*)1;
1261 /* generate the condition */
1262 func->curblock = cond;
1263 cgen = self->cond->expression.codegen;
1264 if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
1269 if (self->on_true) {
1270 /* create on-true block */
1271 ontrue = ir_function_create_block(func->ir_func, ast_function_label(func, "ontrue"));
1275 /* enter the block */
1276 func->curblock = ontrue;
1279 cgen = self->on_true->expression.codegen;
1280 if (!(*cgen)((ast_expression*)(self->on_true), func, false, &dummy))
1286 if (self->on_false) {
1287 /* create on-false block */
1288 onfalse = ir_function_create_block(func->ir_func, ast_function_label(func, "onfalse"));
1292 /* enter the block */
1293 func->curblock = onfalse;
1296 cgen = self->on_false->expression.codegen;
1297 if (!(*cgen)((ast_expression*)(self->on_false), func, false, &dummy))
1302 /* Merge block were they all merge in to */
1303 merge = ir_function_create_block(func->ir_func, ast_function_label(func, "endif"));
1307 /* add jumps ot the merge block */
1308 if (ontrue && !ir_block_create_jump(ontrue, merge))
1310 if (onfalse && !ir_block_create_jump(onfalse, merge))
1313 /* we create the if here, that way all blocks are ordered :)
1315 if (!ir_block_create_if(cond, condval,
1316 (ontrue ? ontrue : merge),
1317 (onfalse ? onfalse : merge)))
1322 /* Now enter the merge block */
1323 func->curblock = merge;
1328 bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_value **out)
1330 ast_expression_codegen *cgen;
1333 ir_value *trueval, *falseval;
1336 ir_block *cond = func->curblock;
1341 /* Ternary can never create an lvalue... */
1345 /* In theory it shouldn't be possible to pass through a node twice, but
1346 * in case we add any kind of optimization pass for the AST itself, it
1347 * may still happen, thus we remember a created ir_value and simply return one
1348 * if it already exists.
1350 if (self->phi_out) {
1351 *out = self->phi_out;
1355 /* In the following, contraty to ast_ifthen, we assume both paths exist. */
1357 /* generate the condition */
1358 func->curblock = cond;
1359 cgen = self->cond->expression.codegen;
1360 if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
1363 /* create on-true block */
1364 ontrue = ir_function_create_block(func->ir_func, ast_function_label(func, "tern_T"));
1369 /* enter the block */
1370 func->curblock = ontrue;
1373 cgen = self->on_true->expression.codegen;
1374 if (!(*cgen)((ast_expression*)(self->on_true), func, false, &trueval))
1378 /* create on-false block */
1379 onfalse = ir_function_create_block(func->ir_func, ast_function_label(func, "tern_F"));
1384 /* enter the block */
1385 func->curblock = onfalse;
1388 cgen = self->on_false->expression.codegen;
1389 if (!(*cgen)((ast_expression*)(self->on_false), func, false, &falseval))
1393 /* create merge block */
1394 merge = ir_function_create_block(func->ir_func, ast_function_label(func, "tern_out"));
1397 /* jump to merge block */
1398 if (!ir_block_create_jump(ontrue, merge))
1400 if (!ir_block_create_jump(onfalse, merge))
1403 /* create if instruction */
1404 if (!ir_block_create_if(cond, condval, ontrue, onfalse))
1407 /* Now enter the merge block */
1408 func->curblock = merge;
1410 /* Here, now, we need a PHI node
1411 * but first some sanity checking...
1413 if (trueval->vtype != falseval->vtype) {
1414 /* error("ternary with different types on the two sides"); */
1419 phi = ir_block_create_phi(merge, ast_function_label(func, "phi"), trueval->vtype);
1421 !ir_phi_add(phi, ontrue, trueval) ||
1422 !ir_phi_add(phi, onfalse, falseval))
1427 self->phi_out = ir_phi_value(phi);
1428 *out = self->phi_out;
1433 bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value **out)
1435 ast_expression_codegen *cgen;
1437 ir_value *dummy = NULL;
1438 ir_value *precond = NULL;
1439 ir_value *postcond = NULL;
1441 /* Since we insert some jumps "late" so we have blocks
1442 * ordered "nicely", we need to keep track of the actual end-blocks
1443 * of expressions to add the jumps to.
1445 ir_block *bbody = NULL, *end_bbody = NULL;
1446 ir_block *bprecond = NULL, *end_bprecond = NULL;
1447 ir_block *bpostcond = NULL, *end_bpostcond = NULL;
1448 ir_block *bincrement = NULL, *end_bincrement = NULL;
1449 ir_block *bout = NULL, *bin = NULL;
1451 /* let's at least move the outgoing block to the end */
1454 /* 'break' and 'continue' need to be able to find the right blocks */
1455 ir_block *bcontinue = NULL;
1456 ir_block *bbreak = NULL;
1458 ir_block *old_bcontinue = NULL;
1459 ir_block *old_bbreak = NULL;
1461 ir_block *tmpblock = NULL;
1466 if (self->expression.outr) {
1467 asterror(ast_ctx(self), "internal error: ast_loop cannot be reused, it bears no result!\n");
1470 self->expression.outr = (ir_value*)1;
1473 * Should we ever need some kind of block ordering, better make this function
1474 * move blocks around than write a block ordering algorithm later... after all
1475 * the ast and ir should work together, not against each other.
1478 /* initexpr doesn't get its own block, it's pointless, it could create more blocks
1479 * anyway if for example it contains a ternary.
1483 cgen = self->initexpr->expression.codegen;
1484 if (!(*cgen)((ast_expression*)(self->initexpr), func, false, &dummy))
1488 /* Store the block from which we enter this chaos */
1489 bin = func->curblock;
1491 /* The pre-loop condition needs its own block since we
1492 * need to be able to jump to the start of that expression.
1496 bprecond = ir_function_create_block(func->ir_func, ast_function_label(func, "pre_loop_cond"));
1500 /* the pre-loop-condition the least important place to 'continue' at */
1501 bcontinue = bprecond;
1504 func->curblock = bprecond;
1507 cgen = self->precond->expression.codegen;
1508 if (!(*cgen)((ast_expression*)(self->precond), func, false, &precond))
1511 end_bprecond = func->curblock;
1513 bprecond = end_bprecond = NULL;
1516 /* Now the next blocks won't be ordered nicely, but we need to
1517 * generate them this early for 'break' and 'continue'.
1519 if (self->increment) {
1520 bincrement = ir_function_create_block(func->ir_func, ast_function_label(func, "loop_increment"));
1523 bcontinue = bincrement; /* increment comes before the pre-loop-condition */
1525 bincrement = end_bincrement = NULL;
1528 if (self->postcond) {
1529 bpostcond = ir_function_create_block(func->ir_func, ast_function_label(func, "post_loop_cond"));
1532 bcontinue = bpostcond; /* postcond comes before the increment */
1534 bpostcond = end_bpostcond = NULL;
1537 bout_id = func->ir_func->blocks_count;
1538 bout = ir_function_create_block(func->ir_func, ast_function_label(func, "after_loop"));
1543 /* The loop body... */
1546 bbody = ir_function_create_block(func->ir_func, ast_function_label(func, "loop_body"));
1551 func->curblock = bbody;
1553 old_bbreak = func->breakblock;
1554 old_bcontinue = func->continueblock;
1555 func->breakblock = bbreak;
1556 func->continueblock = bcontinue;
1559 cgen = self->body->expression.codegen;
1560 if (!(*cgen)((ast_expression*)(self->body), func, false, &dummy))
1563 end_bbody = func->curblock;
1564 func->breakblock = old_bbreak;
1565 func->continueblock = old_bcontinue;
1568 /* post-loop-condition */
1572 func->curblock = bpostcond;
1575 cgen = self->postcond->expression.codegen;
1576 if (!(*cgen)((ast_expression*)(self->postcond), func, false, &postcond))
1579 end_bpostcond = func->curblock;
1582 /* The incrementor */
1583 if (self->increment)
1586 func->curblock = bincrement;
1589 cgen = self->increment->expression.codegen;
1590 if (!(*cgen)((ast_expression*)(self->increment), func, false, &dummy))
1593 end_bincrement = func->curblock;
1596 /* In any case now, we continue from the outgoing block */
1597 func->curblock = bout;
1599 /* Now all blocks are in place */
1600 /* From 'bin' we jump to whatever comes first */
1601 if (bprecond) tmpblock = bprecond;
1602 else if (bbody) tmpblock = bbody;
1603 else if (bpostcond) tmpblock = bpostcond;
1604 else tmpblock = bout;
1605 if (!ir_block_create_jump(bin, tmpblock))
1611 ir_block *ontrue, *onfalse;
1612 if (bbody) ontrue = bbody;
1613 else if (bincrement) ontrue = bincrement;
1614 else if (bpostcond) ontrue = bpostcond;
1615 else ontrue = bprecond;
1617 if (!ir_block_create_if(end_bprecond, precond, ontrue, onfalse))
1624 if (bincrement) tmpblock = bincrement;
1625 else if (bpostcond) tmpblock = bpostcond;
1626 else if (bprecond) tmpblock = bprecond;
1627 else tmpblock = bout;
1628 if (!ir_block_create_jump(end_bbody, tmpblock))
1632 /* from increment */
1635 if (bpostcond) tmpblock = bpostcond;
1636 else if (bprecond) tmpblock = bprecond;
1637 else if (bbody) tmpblock = bbody;
1638 else tmpblock = bout;
1639 if (!ir_block_create_jump(end_bincrement, tmpblock))
1646 ir_block *ontrue, *onfalse;
1647 if (bprecond) ontrue = bprecond;
1648 else if (bbody) ontrue = bbody;
1649 else if (bincrement) ontrue = bincrement;
1650 else ontrue = bpostcond;
1652 if (!ir_block_create_if(end_bpostcond, postcond, ontrue, onfalse))
1656 /* Move 'bout' to the end */
1657 if (!ir_function_blocks_remove(func->ir_func, bout_id) ||
1658 !ir_function_blocks_add(func->ir_func, bout))
1660 ir_block_delete(bout);
1667 bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value **out)
1669 ast_expression_codegen *cgen;
1670 ir_value_vector params;
1671 ir_instr *callinstr;
1674 ir_value *funval = NULL;
1676 /* return values are never lvalues */
1679 if (self->expression.outr) {
1680 *out = self->expression.outr;
1684 cgen = self->func->expression.codegen;
1685 if (!(*cgen)((ast_expression*)(self->func), func, false, &funval))
1690 MEM_VECTOR_INIT(¶ms, v);
1693 for (i = 0; i < self->params_count; ++i)
1696 ast_expression *expr = self->params[i];
1698 cgen = expr->expression.codegen;
1699 if (!(*cgen)(expr, func, false, ¶m))
1703 if (!ir_value_vector_v_add(¶ms, param))
1707 callinstr = ir_block_create_call(func->curblock, ast_function_label(func, "call"), funval);
1711 for (i = 0; i < params.v_count; ++i) {
1712 if (!ir_call_param(callinstr, params.v[i]))
1716 *out = ir_call_value(callinstr);
1717 self->expression.outr = *out;
1719 MEM_VECTOR_CLEAR(¶ms, v);
1722 MEM_VECTOR_CLEAR(¶ms, v);