--- /dev/null
+/*
+ * Copyright (C) 2012, 2013
+ * Wolfgang Bumiller
+ * Dale Weiler
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <stdlib.h>
+#include <string.h>
+
+#include "gmqcc.h"
+#include "ast.h"
+
+#define ast_instantiate(T, ctx, destroyfn) \
+ T* self = (T*)mem_a(sizeof(T)); \
+ if (!self) { \
+ return NULL; \
+ } \
+ ast_node_init((ast_node*)self, ctx, TYPE_##T); \
+ ( (ast_node*)self )->destroy = (ast_node_delete*)destroyfn
+
+/*
+ * forward declarations, these need not be in ast.h for obvious
+ * static reasons.
+ */
+static bool ast_member_codegen(ast_member*, ast_function*, bool lvalue, ir_value**);
+static void ast_array_index_delete(ast_array_index*);
+static bool ast_array_index_codegen(ast_array_index*, ast_function*, bool lvalue, ir_value**);
+static void ast_store_delete(ast_store*);
+static bool ast_store_codegen(ast_store*, ast_function*, bool lvalue, ir_value**);
+static void ast_ifthen_delete(ast_ifthen*);
+static bool ast_ifthen_codegen(ast_ifthen*, ast_function*, bool lvalue, ir_value**);
+static void ast_ternary_delete(ast_ternary*);
+static bool ast_ternary_codegen(ast_ternary*, ast_function*, bool lvalue, ir_value**);
+static void ast_loop_delete(ast_loop*);
+static bool ast_loop_codegen(ast_loop*, ast_function*, bool lvalue, ir_value**);
+static void ast_breakcont_delete(ast_breakcont*);
+static bool ast_breakcont_codegen(ast_breakcont*, ast_function*, bool lvalue, ir_value**);
+static void ast_switch_delete(ast_switch*);
+static bool ast_switch_codegen(ast_switch*, ast_function*, bool lvalue, ir_value**);
+static void ast_label_delete(ast_label*);
+static void ast_label_register_goto(ast_label*, ast_goto*);
+static bool ast_label_codegen(ast_label*, ast_function*, bool lvalue, ir_value**);
+static bool ast_goto_codegen(ast_goto*, ast_function*, bool lvalue, ir_value**);
+static void ast_goto_delete(ast_goto*);
+static void ast_call_delete(ast_call*);
+static bool ast_call_codegen(ast_call*, ast_function*, bool lvalue, ir_value**);
+static bool ast_block_codegen(ast_block*, ast_function*, bool lvalue, ir_value**);
+static void ast_unary_delete(ast_unary*);
+static bool ast_unary_codegen(ast_unary*, ast_function*, bool lvalue, ir_value**);
+static void ast_entfield_delete(ast_entfield*);
+static bool ast_entfield_codegen(ast_entfield*, ast_function*, bool lvalue, ir_value**);
+static void ast_return_delete(ast_return*);
+static bool ast_return_codegen(ast_return*, ast_function*, bool lvalue, ir_value**);
+static void ast_binstore_delete(ast_binstore*);
+static bool ast_binstore_codegen(ast_binstore*, ast_function*, bool lvalue, ir_value**);
+static void ast_binary_delete(ast_binary*);
+static bool ast_binary_codegen(ast_binary*, ast_function*, bool lvalue, ir_value**);
+
+/* It must not be possible to get here. */
+static GMQCC_NORETURN void _ast_node_destroy(ast_node *self)
+{
+ (void)self;
+ con_err("ast node missing destroy()\n");
+ exit(EXIT_FAILURE);
+}
+
+/* Initialize main ast node aprts */
+static void ast_node_init(ast_node *self, lex_ctx ctx, int nodetype)
+{
+ self->context = ctx;
+ self->destroy = &_ast_node_destroy;
+ self->keep = false;
+ self->nodetype = nodetype;
+ self->side_effects = false;
+}
+
+/* weight and side effects */
+static void _ast_propagate_effects(ast_node *self, ast_node *other)
+{
+ if (ast_side_effects(other))
+ ast_side_effects(self) = true;
+}
+#define ast_propagate_effects(s,o) _ast_propagate_effects(((ast_node*)(s)), ((ast_node*)(o)))
+
+/* General expression initialization */
+static void ast_expression_init(ast_expression *self,
+ ast_expression_codegen *codegen)
+{
+ self->codegen = codegen;
+ self->vtype = TYPE_VOID;
+ self->next = NULL;
+ self->outl = NULL;
+ self->outr = NULL;
+ self->params = NULL;
+ self->count = 0;
+ self->flags = 0;
+ self->varparam = NULL;
+}
+
+static void ast_expression_delete(ast_expression *self)
+{
+ size_t i;
+ if (self->next)
+ ast_delete(self->next);
+ for (i = 0; i < vec_size(self->params); ++i) {
+ ast_delete(self->params[i]);
+ }
+ vec_free(self->params);
+ if (self->varparam)
+ ast_delete(self->varparam);
+}
+
+static void ast_expression_delete_full(ast_expression *self)
+{
+ ast_expression_delete(self);
+ mem_d(self);
+}
+
+ast_value* ast_value_copy(const ast_value *self)
+{
+ size_t i;
+ const ast_expression *fromex;
+ ast_expression *selfex;
+ ast_value *cp = ast_value_new(self->expression.node.context, self->name, self->expression.vtype);
+ if (self->expression.next) {
+ cp->expression.next = ast_type_copy(self->expression.node.context, self->expression.next);
+ }
+ fromex = &self->expression;
+ selfex = &cp->expression;
+ selfex->count = fromex->count;
+ selfex->flags = fromex->flags;
+ for (i = 0; i < vec_size(fromex->params); ++i) {
+ ast_value *v = ast_value_copy(fromex->params[i]);
+ vec_push(selfex->params, v);
+ }
+ return cp;
+}
+
+void ast_type_adopt_impl(ast_expression *self, const ast_expression *other)
+{
+ size_t i;
+ const ast_expression *fromex;
+ ast_expression *selfex;
+ self->vtype = other->vtype;
+ if (other->next) {
+ self->next = (ast_expression*)ast_type_copy(ast_ctx(self), other->next);
+ }
+ fromex = other;
+ selfex = self;
+ selfex->count = fromex->count;
+ selfex->flags = fromex->flags;
+ for (i = 0; i < vec_size(fromex->params); ++i) {
+ ast_value *v = ast_value_copy(fromex->params[i]);
+ vec_push(selfex->params, v);
+ }
+}
+
+static ast_expression* ast_shallow_type(lex_ctx ctx, int vtype)
+{
+ ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
+ ast_expression_init(self, NULL);
+ self->codegen = NULL;
+ self->next = NULL;
+ self->vtype = vtype;
+ return self;
+}
+
+ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
+{
+ size_t i;
+ const ast_expression *fromex;
+ ast_expression *selfex;
+
+ if (!ex)
+ return NULL;
+ else
+ {
+ ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
+ ast_expression_init(self, NULL);
+
+ fromex = ex;
+ selfex = self;
+
+ /* This may never be codegen()d */
+ selfex->codegen = NULL;
+
+ selfex->vtype = fromex->vtype;
+ if (fromex->next)
+ selfex->next = ast_type_copy(ctx, fromex->next);
+ else
+ selfex->next = NULL;
+
+ selfex->count = fromex->count;
+ selfex->flags = fromex->flags;
+ for (i = 0; i < vec_size(fromex->params); ++i) {
+ ast_value *v = ast_value_copy(fromex->params[i]);
+ vec_push(selfex->params, v);
+ }
+
+ return self;
+ }
+}
+
+bool ast_compare_type(ast_expression *a, ast_expression *b)
+{
+ if (a->vtype == TYPE_NIL ||
+ b->vtype == TYPE_NIL)
+ return true;
+ if (a->vtype != b->vtype)
+ return false;
+ if (!a->next != !b->next)
+ return false;
+ if (vec_size(a->params) != vec_size(b->params))
+ return false;
+ if ((a->flags & AST_FLAG_TYPE_MASK) !=
+ (b->flags & AST_FLAG_TYPE_MASK) )
+ {
+ return false;
+ }
+ if (vec_size(a->params)) {
+ size_t i;
+ for (i = 0; i < vec_size(a->params); ++i) {
+ if (!ast_compare_type((ast_expression*)a->params[i],
+ (ast_expression*)b->params[i]))
+ return false;
+ }
+ }
+ if (a->next)
+ return ast_compare_type(a->next, b->next);
+ return true;
+}
+
+static size_t ast_type_to_string_impl(ast_expression *e, char *buf, size_t bufsize, size_t pos)
+{
+ const char *typestr;
+ size_t typelen;
+ size_t i;
+
+ if (!e) {
+ if (pos + 6 >= bufsize)
+ goto full;
+ util_strncpy(buf + pos, "(null)", 6);
+ return pos + 6;
+ }
+
+ if (pos + 1 >= bufsize)
+ goto full;
+
+ switch (e->vtype) {
+ case TYPE_VARIANT:
+ util_strncpy(buf + pos, "(variant)", 9);
+ return pos + 9;
+
+ case TYPE_FIELD:
+ buf[pos++] = '.';
+ return ast_type_to_string_impl(e->next, buf, bufsize, pos);
+
+ case TYPE_POINTER:
+ if (pos + 3 >= bufsize)
+ goto full;
+ buf[pos++] = '*';
+ buf[pos++] = '(';
+ pos = ast_type_to_string_impl(e->next, buf, bufsize, pos);
+ if (pos + 1 >= bufsize)
+ goto full;
+ buf[pos++] = ')';
+ return pos;
+
+ case TYPE_FUNCTION:
+ pos = ast_type_to_string_impl(e->next, buf, bufsize, pos);
+ if (pos + 2 >= bufsize)
+ goto full;
+ if (!vec_size(e->params)) {
+ buf[pos++] = '(';
+ buf[pos++] = ')';
+ return pos;
+ }
+ buf[pos++] = '(';
+ pos = ast_type_to_string_impl((ast_expression*)(e->params[0]), buf, bufsize, pos);
+ for (i = 1; i < vec_size(e->params); ++i) {
+ if (pos + 2 >= bufsize)
+ goto full;
+ buf[pos++] = ',';
+ buf[pos++] = ' ';
+ pos = ast_type_to_string_impl((ast_expression*)(e->params[i]), buf, bufsize, pos);
+ }
+ if (pos + 1 >= bufsize)
+ goto full;
+ buf[pos++] = ')';
+ return pos;
+
+ case TYPE_ARRAY:
+ pos = ast_type_to_string_impl(e->next, buf, bufsize, pos);
+ if (pos + 1 >= bufsize)
+ goto full;
+ buf[pos++] = '[';
+ pos += util_snprintf(buf + pos, bufsize - pos - 1, "%i", (int)e->count);
+ if (pos + 1 >= bufsize)
+ goto full;
+ buf[pos++] = ']';
+ return pos;
+
+ default:
+ typestr = type_name[e->vtype];
+ typelen = strlen(typestr);
+ if (pos + typelen >= bufsize)
+ goto full;
+ util_strncpy(buf + pos, typestr, typelen);
+ return pos + typelen;
+ }
+
+full:
+ buf[bufsize-3] = '.';
+ buf[bufsize-2] = '.';
+ buf[bufsize-1] = '.';
+ return bufsize;
+}
+
+void ast_type_to_string(ast_expression *e, char *buf, size_t bufsize)
+{
+ size_t pos = ast_type_to_string_impl(e, buf, bufsize-1, 0);
+ buf[pos] = 0;
+}
+
+static bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_value **out);
+ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
+{
+ ast_instantiate(ast_value, ctx, ast_value_delete);
+ ast_expression_init((ast_expression*)self,
+ (ast_expression_codegen*)&ast_value_codegen);
+ self->expression.node.keep = true; /* keep */
+
+ self->name = name ? util_strdup(name) : NULL;
+ self->expression.vtype = t;
+ self->expression.next = NULL;
+ self->isfield = false;
+ self->cvq = CV_NONE;
+ self->hasvalue = false;
+ self->isimm = false;
+ self->uses = 0;
+ memset(&self->constval, 0, sizeof(self->constval));
+ self->initlist = NULL;
+
+ self->ir_v = NULL;
+ self->ir_values = NULL;
+ self->ir_value_count = 0;
+
+ self->setter = NULL;
+ self->getter = NULL;
+ self->desc = NULL;
+
+ self->argcounter = NULL;
+
+ return self;
+}
+
+void ast_value_delete(ast_value* self)
+{
+ if (self->name)
+ mem_d((void*)self->name);
+ if (self->argcounter)
+ mem_d((void*)self->argcounter);
+ if (self->hasvalue) {
+ switch (self->expression.vtype)
+ {
+ case TYPE_STRING:
+ mem_d((void*)self->constval.vstring);
+ break;
+ case TYPE_FUNCTION:
+ /* unlink us from the function node */
+ self->constval.vfunc->vtype = NULL;
+ break;
+ /* NOTE: delete function? currently collected in
+ * the parser structure
+ */
+ default:
+ break;
+ }
+ }
+ if (self->ir_values)
+ mem_d(self->ir_values);
+
+ if (self->desc)
+ mem_d(self->desc);
+
+ if (self->initlist) {
+ if (self->expression.next->vtype == TYPE_STRING) {
+ /* strings are allocated, free them */
+ size_t i, len = vec_size(self->initlist);
+ /* in theory, len should be expression.count
+ * but let's not take any chances */
+ for (i = 0; i < len; ++i) {
+ if (self->initlist[i].vstring)
+ mem_d(self->initlist[i].vstring);
+ }
+ }
+ vec_free(self->initlist);
+ }
+
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+void ast_value_params_add(ast_value *self, ast_value *p)
+{
+ vec_push(self->expression.params, p);
+}
+
+bool ast_value_set_name(ast_value *self, const char *name)
+{
+ if (self->name)
+ mem_d((void*)self->name);
+ self->name = util_strdup(name);
+ return !!self->name;
+}
+
+ast_binary* ast_binary_new(lex_ctx ctx, int op,
+ ast_expression* left, ast_expression* right)
+{
+ ast_instantiate(ast_binary, ctx, ast_binary_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_binary_codegen);
+
+ self->op = op;
+ self->left = left;
+ self->right = right;
+
+ ast_propagate_effects(self, left);
+ ast_propagate_effects(self, right);
+
+ if (op >= INSTR_EQ_F && op <= INSTR_GT)
+ self->expression.vtype = TYPE_FLOAT;
+ else if (op == INSTR_AND || op == INSTR_OR) {
+ if (OPTS_FLAG(PERL_LOGIC))
+ ast_type_adopt(self, right);
+ else
+ self->expression.vtype = TYPE_FLOAT;
+ }
+ else if (op == INSTR_BITAND || op == INSTR_BITOR)
+ self->expression.vtype = TYPE_FLOAT;
+ else if (op == INSTR_MUL_VF || op == INSTR_MUL_FV)
+ self->expression.vtype = TYPE_VECTOR;
+ else if (op == INSTR_MUL_V)
+ self->expression.vtype = TYPE_FLOAT;
+ else
+ self->expression.vtype = left->vtype;
+
+ /* references all */
+ self->refs = AST_REF_ALL;
+
+ return self;
+}
+
+void ast_binary_delete(ast_binary *self)
+{
+ if (self->refs & AST_REF_LEFT) ast_unref(self->left);
+ if (self->refs & AST_REF_RIGHT) ast_unref(self->right);
+
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_binstore* ast_binstore_new(lex_ctx ctx, int storop, int op,
+ ast_expression* left, ast_expression* right)
+{
+ ast_instantiate(ast_binstore, ctx, ast_binstore_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_binstore_codegen);
+
+ ast_side_effects(self) = true;
+
+ self->opstore = storop;
+ self->opbin = op;
+ self->dest = left;
+ self->source = right;
+
+ self->keep_dest = false;
+
+ ast_type_adopt(self, left);
+ return self;
+}
+
+void ast_binstore_delete(ast_binstore *self)
+{
+ if (!self->keep_dest)
+ ast_unref(self->dest);
+ ast_unref(self->source);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_unary* ast_unary_new(lex_ctx ctx, int op,
+ ast_expression *expr)
+{
+ ast_instantiate(ast_unary, ctx, ast_unary_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_unary_codegen);
+
+ self->op = op;
+ self->operand = expr;
+
+ ast_propagate_effects(self, expr);
+
+ if (op >= INSTR_NOT_F && op <= INSTR_NOT_FNC) {
+ self->expression.vtype = TYPE_FLOAT;
+ } else
+ compile_error(ctx, "cannot determine type of unary operation %s", asm_instr[op].m);
+
+ return self;
+}
+
+void ast_unary_delete(ast_unary *self)
+{
+ if (self->operand) ast_unref(self->operand);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_return* ast_return_new(lex_ctx ctx, ast_expression *expr)
+{
+ ast_instantiate(ast_return, ctx, ast_return_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_return_codegen);
+
+ self->operand = expr;
+
+ if (expr)
+ ast_propagate_effects(self, expr);
+
+ return self;
+}
+
+void ast_return_delete(ast_return *self)
+{
+ if (self->operand)
+ ast_unref(self->operand);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_entfield* ast_entfield_new(lex_ctx ctx, ast_expression *entity, ast_expression *field)
+{
+ if (field->vtype != TYPE_FIELD) {
+ compile_error(ctx, "ast_entfield_new with expression not of type field");
+ return NULL;
+ }
+ return ast_entfield_new_force(ctx, entity, field, field->next);
+}
+
+ast_entfield* ast_entfield_new_force(lex_ctx ctx, ast_expression *entity, ast_expression *field, const ast_expression *outtype)
+{
+ ast_instantiate(ast_entfield, ctx, ast_entfield_delete);
+
+ if (!outtype) {
+ mem_d(self);
+ /* Error: field has no type... */
+ return NULL;
+ }
+
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_entfield_codegen);
+
+ self->entity = entity;
+ self->field = field;
+ ast_propagate_effects(self, entity);
+ ast_propagate_effects(self, field);
+
+ ast_type_adopt(self, outtype);
+ return self;
+}
+
+void ast_entfield_delete(ast_entfield *self)
+{
+ ast_unref(self->entity);
+ ast_unref(self->field);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_member* ast_member_new(lex_ctx ctx, ast_expression *owner, unsigned int field, const char *name)
+{
+ ast_instantiate(ast_member, ctx, ast_member_delete);
+ if (field >= 3) {
+ mem_d(self);
+ return NULL;
+ }
+
+ if (owner->vtype != TYPE_VECTOR &&
+ owner->vtype != TYPE_FIELD) {
+ compile_error(ctx, "member-access on an invalid owner of type %s", type_name[owner->vtype]);
+ mem_d(self);
+ return NULL;
+ }
+
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_member_codegen);
+ self->expression.node.keep = true; /* keep */
+
+ if (owner->vtype == TYPE_VECTOR) {
+ self->expression.vtype = TYPE_FLOAT;
+ self->expression.next = NULL;
+ } else {
+ self->expression.vtype = TYPE_FIELD;
+ self->expression.next = ast_shallow_type(ctx, TYPE_FLOAT);
+ }
+
+ self->rvalue = false;
+ self->owner = owner;
+ ast_propagate_effects(self, owner);
+
+ self->field = field;
+ if (name)
+ self->name = util_strdup(name);
+ else
+ self->name = NULL;
+
+ return self;
+}
+
+void ast_member_delete(ast_member *self)
+{
+ /* The owner is always an ast_value, which has .keep=true,
+ * also: ast_members are usually deleted after the owner, thus
+ * this will cause invalid access
+ ast_unref(self->owner);
+ * once we allow (expression).x to access a vector-member, we need
+ * to change this: preferably by creating an alternate ast node for this
+ * purpose that is not garbage-collected.
+ */
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self->name);
+ mem_d(self);
+}
+
+bool ast_member_set_name(ast_member *self, const char *name)
+{
+ if (self->name)
+ mem_d((void*)self->name);
+ self->name = util_strdup(name);
+ return !!self->name;
+}
+
+ast_array_index* ast_array_index_new(lex_ctx ctx, ast_expression *array, ast_expression *index)
+{
+ ast_expression *outtype;
+ ast_instantiate(ast_array_index, ctx, ast_array_index_delete);
+
+ outtype = array->next;
+ if (!outtype) {
+ mem_d(self);
+ /* Error: field has no type... */
+ return NULL;
+ }
+
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_array_index_codegen);
+
+ self->array = array;
+ self->index = index;
+ ast_propagate_effects(self, array);
+ ast_propagate_effects(self, index);
+
+ ast_type_adopt(self, outtype);
+ if (array->vtype == TYPE_FIELD && outtype->vtype == TYPE_ARRAY) {
+ if (self->expression.vtype != TYPE_ARRAY) {
+ compile_error(ast_ctx(self), "array_index node on type");
+ ast_array_index_delete(self);
+ return NULL;
+ }
+ self->array = outtype;
+ self->expression.vtype = TYPE_FIELD;
+ }
+
+ return self;
+}
+
+void ast_array_index_delete(ast_array_index *self)
+{
+ if (self->array)
+ ast_unref(self->array);
+ if (self->index)
+ ast_unref(self->index);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_ifthen* ast_ifthen_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
+{
+ ast_instantiate(ast_ifthen, ctx, ast_ifthen_delete);
+ if (!ontrue && !onfalse) {
+ /* because it is invalid */
+ mem_d(self);
+ return NULL;
+ }
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_ifthen_codegen);
+
+ self->cond = cond;
+ self->on_true = ontrue;
+ self->on_false = onfalse;
+ ast_propagate_effects(self, cond);
+ if (ontrue)
+ ast_propagate_effects(self, ontrue);
+ if (onfalse)
+ ast_propagate_effects(self, onfalse);
+
+ return self;
+}
+
+void ast_ifthen_delete(ast_ifthen *self)
+{
+ ast_unref(self->cond);
+ if (self->on_true)
+ ast_unref(self->on_true);
+ if (self->on_false)
+ ast_unref(self->on_false);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
+{
+ ast_expression *exprtype = ontrue;
+ ast_instantiate(ast_ternary, ctx, ast_ternary_delete);
+ /* This time NEITHER must be NULL */
+ if (!ontrue || !onfalse) {
+ mem_d(self);
+ return NULL;
+ }
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_ternary_codegen);
+
+ self->cond = cond;
+ self->on_true = ontrue;
+ self->on_false = onfalse;
+ ast_propagate_effects(self, cond);
+ ast_propagate_effects(self, ontrue);
+ ast_propagate_effects(self, onfalse);
+
+ if (ontrue->vtype == TYPE_NIL)
+ exprtype = onfalse;
+ ast_type_adopt(self, exprtype);
+
+ return self;
+}
+
+void ast_ternary_delete(ast_ternary *self)
+{
+ /* the if()s are only there because computed-gotos can set them
+ * to NULL
+ */
+ if (self->cond) ast_unref(self->cond);
+ if (self->on_true) ast_unref(self->on_true);
+ if (self->on_false) ast_unref(self->on_false);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_loop* ast_loop_new(lex_ctx ctx,
+ ast_expression *initexpr,
+ ast_expression *precond, bool pre_not,
+ ast_expression *postcond, bool post_not,
+ ast_expression *increment,
+ ast_expression *body)
+{
+ ast_instantiate(ast_loop, ctx, ast_loop_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_loop_codegen);
+
+ self->initexpr = initexpr;
+ self->precond = precond;
+ self->postcond = postcond;
+ self->increment = increment;
+ self->body = body;
+
+ self->pre_not = pre_not;
+ self->post_not = post_not;
+
+ if (initexpr)
+ ast_propagate_effects(self, initexpr);
+ if (precond)
+ ast_propagate_effects(self, precond);
+ if (postcond)
+ ast_propagate_effects(self, postcond);
+ if (increment)
+ ast_propagate_effects(self, increment);
+ if (body)
+ ast_propagate_effects(self, body);
+
+ return self;
+}
+
+void ast_loop_delete(ast_loop *self)
+{
+ if (self->initexpr)
+ ast_unref(self->initexpr);
+ if (self->precond)
+ ast_unref(self->precond);
+ if (self->postcond)
+ ast_unref(self->postcond);
+ if (self->increment)
+ ast_unref(self->increment);
+ if (self->body)
+ ast_unref(self->body);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_breakcont* ast_breakcont_new(lex_ctx ctx, bool iscont, unsigned int levels)
+{
+ ast_instantiate(ast_breakcont, ctx, ast_breakcont_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_breakcont_codegen);
+
+ self->is_continue = iscont;
+ self->levels = levels;
+
+ return self;
+}
+
+void ast_breakcont_delete(ast_breakcont *self)
+{
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_switch* ast_switch_new(lex_ctx ctx, ast_expression *op)
+{
+ ast_instantiate(ast_switch, ctx, ast_switch_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_switch_codegen);
+
+ self->operand = op;
+ self->cases = NULL;
+
+ ast_propagate_effects(self, op);
+
+ return self;
+}
+
+void ast_switch_delete(ast_switch *self)
+{
+ size_t i;
+ ast_unref(self->operand);
+
+ for (i = 0; i < vec_size(self->cases); ++i) {
+ if (self->cases[i].value)
+ ast_unref(self->cases[i].value);
+ ast_unref(self->cases[i].code);
+ }
+ vec_free(self->cases);
+
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_label* ast_label_new(lex_ctx ctx, const char *name, bool undefined)
+{
+ ast_instantiate(ast_label, ctx, ast_label_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_label_codegen);
+
+ self->expression.vtype = TYPE_NOEXPR;
+
+ self->name = util_strdup(name);
+ self->irblock = NULL;
+ self->gotos = NULL;
+ self->undefined = undefined;
+
+ return self;
+}
+
+void ast_label_delete(ast_label *self)
+{
+ mem_d((void*)self->name);
+ vec_free(self->gotos);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+static void ast_label_register_goto(ast_label *self, ast_goto *g)
+{
+ vec_push(self->gotos, g);
+}
+
+ast_goto* ast_goto_new(lex_ctx ctx, const char *name)
+{
+ ast_instantiate(ast_goto, ctx, ast_goto_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_goto_codegen);
+
+ self->name = util_strdup(name);
+ self->target = NULL;
+ self->irblock_from = NULL;
+
+ return self;
+}
+
+void ast_goto_delete(ast_goto *self)
+{
+ mem_d((void*)self->name);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+void ast_goto_set_label(ast_goto *self, ast_label *label)
+{
+ self->target = label;
+}
+
+ast_call* ast_call_new(lex_ctx ctx,
+ ast_expression *funcexpr)
+{
+ ast_instantiate(ast_call, ctx, ast_call_delete);
+ if (!funcexpr->next) {
+ compile_error(ctx, "not a function");
+ mem_d(self);
+ return NULL;
+ }
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_call_codegen);
+
+ ast_side_effects(self) = true;
+
+ self->params = NULL;
+ self->func = funcexpr;
+ self->va_count = NULL;
+
+ ast_type_adopt(self, funcexpr->next);
+
+ return self;
+}
+
+void ast_call_delete(ast_call *self)
+{
+ size_t i;
+ for (i = 0; i < vec_size(self->params); ++i)
+ ast_unref(self->params[i]);
+ vec_free(self->params);
+
+ if (self->func)
+ ast_unref(self->func);
+
+ if (self->va_count)
+ ast_unref(self->va_count);
+
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+bool ast_call_check_types(ast_call *self)
+{
+ char texp[1024];
+ char tgot[1024];
+ size_t i;
+ bool retval = true;
+ const ast_expression *func = self->func;
+ size_t count = vec_size(self->params);
+ if (count > vec_size(func->params))
+ count = vec_size(func->params);
+
+ for (i = 0; i < count; ++i) {
+ if (!ast_compare_type(self->params[i], (ast_expression*)(func->params[i])))
+ {
+ ast_type_to_string(self->params[i], tgot, sizeof(tgot));
+ ast_type_to_string((ast_expression*)func->params[i], texp, sizeof(texp));
+ compile_error(ast_ctx(self), "invalid type for parameter %u in function call: expected %s, got %s",
+ (unsigned int)(i+1), texp, tgot);
+ /* we don't immediately return */
+ retval = false;
+ }
+ }
+ count = vec_size(self->params);
+ if (count > vec_size(func->params) && func->varparam) {
+ for (; i < count; ++i) {
+ if (!ast_compare_type(self->params[i], func->varparam))
+ {
+ ast_type_to_string(self->params[i], tgot, sizeof(tgot));
+ ast_type_to_string(func->varparam, texp, sizeof(texp));
+ compile_error(ast_ctx(self), "invalid type for parameter %u in function call: expected %s, got %s",
+ (unsigned int)(i+1), texp, tgot);
+ /* we don't immediately return */
+ retval = false;
+ }
+ }
+ }
+ return retval;
+}
+
+ast_store* ast_store_new(lex_ctx ctx, int op,
+ ast_expression *dest, ast_expression *source)
+{
+ ast_instantiate(ast_store, ctx, ast_store_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_store_codegen);
+
+ ast_side_effects(self) = true;
+
+ self->op = op;
+ self->dest = dest;
+ self->source = source;
+
+ ast_type_adopt(self, dest);
+
+ return self;
+}
+
+void ast_store_delete(ast_store *self)
+{
+ ast_unref(self->dest);
+ ast_unref(self->source);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_block* ast_block_new(lex_ctx ctx)
+{
+ ast_instantiate(ast_block, ctx, ast_block_delete);
+ ast_expression_init((ast_expression*)self,
+ (ast_expression_codegen*)&ast_block_codegen);
+
+ self->locals = NULL;
+ self->exprs = NULL;
+ self->collect = NULL;
+
+ return self;
+}
+
+bool ast_block_add_expr(ast_block *self, ast_expression *e)
+{
+ ast_propagate_effects(self, e);
+ vec_push(self->exprs, e);
+ if (self->expression.next) {
+ ast_delete(self->expression.next);
+ self->expression.next = NULL;
+ }
+ ast_type_adopt(self, e);
+ return true;
+}
+
+void ast_block_collect(ast_block *self, ast_expression *expr)
+{
+ vec_push(self->collect, expr);
+ expr->node.keep = true;
+}
+
+void ast_block_delete(ast_block *self)
+{
+ size_t i;
+ for (i = 0; i < vec_size(self->exprs); ++i)
+ ast_unref(self->exprs[i]);
+ vec_free(self->exprs);
+ for (i = 0; i < vec_size(self->locals); ++i)
+ ast_delete(self->locals[i]);
+ vec_free(self->locals);
+ for (i = 0; i < vec_size(self->collect); ++i)
+ ast_delete(self->collect[i]);
+ vec_free(self->collect);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+void ast_block_set_type(ast_block *self, ast_expression *from)
+{
+ if (self->expression.next)
+ ast_delete(self->expression.next);
+ ast_type_adopt(self, from);
+}
+
+ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
+{
+ ast_instantiate(ast_function, ctx, ast_function_delete);
+
+ if (!vtype ||
+ vtype->hasvalue ||
+ vtype->expression.vtype != TYPE_FUNCTION)
+ {
+ compile_error(ast_ctx(self), "internal error: ast_function_new condition %i %i type=%i (probably 2 bodies?)",
+ (int)!vtype,
+ (int)vtype->hasvalue,
+ vtype->expression.vtype);
+ mem_d(self);
+ return NULL;
+ }
+
+ self->vtype = vtype;
+ self->name = name ? util_strdup(name) : NULL;
+ self->blocks = NULL;
+
+ self->labelcount = 0;
+ self->builtin = 0;
+
+ self->ir_func = NULL;
+ self->curblock = NULL;
+
+ self->breakblocks = NULL;
+ self->continueblocks = NULL;
+
+ vtype->hasvalue = true;
+ vtype->constval.vfunc = self;
+
+ self->varargs = NULL;
+ self->argc = NULL;
+ self->fixedparams = NULL;
+ self->return_value = NULL;
+
+ return self;
+}
+
+void ast_function_delete(ast_function *self)
+{
+ size_t i;
+ if (self->name)
+ mem_d((void*)self->name);
+ if (self->vtype) {
+ /* ast_value_delete(self->vtype); */
+ self->vtype->hasvalue = false;
+ self->vtype->constval.vfunc = NULL;
+ /* We use unref - if it was stored in a global table it is supposed
+ * to be deleted from *there*
+ */
+ ast_unref(self->vtype);
+ }
+ for (i = 0; i < vec_size(self->blocks); ++i)
+ ast_delete(self->blocks[i]);
+ vec_free(self->blocks);
+ vec_free(self->breakblocks);
+ vec_free(self->continueblocks);
+ if (self->varargs)
+ ast_delete(self->varargs);
+ if (self->argc)
+ ast_delete(self->argc);
+ if (self->fixedparams)
+ ast_unref(self->fixedparams);
+ if (self->return_value)
+ ast_unref(self->return_value);
+ mem_d(self);
+}
+
+static const char* ast_function_label(ast_function *self, const char *prefix)
+{
+ size_t id;
+ size_t len;
+ char *from;
+
+ if (!OPTS_OPTION_BOOL(OPTION_DUMP) &&
+ !OPTS_OPTION_BOOL(OPTION_DUMPFIN) &&
+ !OPTS_OPTION_BOOL(OPTION_DEBUG))
+ {
+ return NULL;
+ }
+
+ id = (self->labelcount++);
+ len = strlen(prefix);
+
+ from = self->labelbuf + sizeof(self->labelbuf)-1;
+ *from-- = 0;
+ do {
+ *from-- = (id%10) + '0';
+ id /= 10;
+ } while (id);
+ ++from;
+ memcpy(from - len, prefix, len);
+ return from - len;
+}
+
+/*********************************************************************/
+/* AST codegen part
+ * by convention you must never pass NULL to the 'ir_value **out'
+ * parameter. If you really don't care about the output, pass a dummy.
+ * But I can't imagine a pituation where the output is truly unnecessary.
+ */
+
+static void _ast_codegen_output_type(ast_expression *self, ir_value *out)
+{
+ if (out->vtype == TYPE_FIELD)
+ out->fieldtype = self->next->vtype;
+ if (out->vtype == TYPE_FUNCTION)
+ out->outtype = self->next->vtype;
+}
+
+#define codegen_output_type(a,o) (_ast_codegen_output_type(&((a)->expression),(o)))
+
+bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ (void)func;
+ (void)lvalue;
+ if (self->expression.vtype == TYPE_NIL) {
+ *out = func->ir_func->owner->nil;
+ return true;
+ }
+ /* NOTE: This is the codegen for a variable used in an expression.
+ * It is not the codegen to generate the value. For this purpose,
+ * ast_local_codegen and ast_global_codegen are to be used before this
+ * is executed. ast_function_codegen should take care of its locals,
+ * and the ast-user should take care of ast_global_codegen to be used
+ * on all the globals.
+ */
+ if (!self->ir_v) {
+ char tname[1024]; /* typename is reserved in C++ */
+ ast_type_to_string((ast_expression*)self, tname, sizeof(tname));
+ compile_error(ast_ctx(self), "ast_value used before generated %s %s", tname, self->name);
+ return false;
+ }
+ *out = self->ir_v;
+ return true;
+}
+
+bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
+{
+ ir_value *v = NULL;
+
+ if (self->expression.vtype == TYPE_NIL) {
+ compile_error(ast_ctx(self), "internal error: trying to generate a variable of TYPE_NIL");
+ return false;
+ }
+
+ if (self->hasvalue && self->expression.vtype == TYPE_FUNCTION)
+ {
+ ir_function *func = ir_builder_create_function(ir, self->name, self->expression.next->vtype);
+ if (!func)
+ return false;
+ func->context = ast_ctx(self);
+ func->value->context = ast_ctx(self);
+
+ self->constval.vfunc->ir_func = func;
+ self->ir_v = func->value;
+ if (self->expression.flags & AST_FLAG_INCLUDE_DEF)
+ self->ir_v->flags |= IR_FLAG_INCLUDE_DEF;
+ /* The function is filled later on ast_function_codegen... */
+ return true;
+ }
+
+ if (isfield && self->expression.vtype == TYPE_FIELD) {
+ ast_expression *fieldtype = self->expression.next;
+
+ if (self->hasvalue) {
+ compile_error(ast_ctx(self), "TODO: constant field pointers with value");
+ goto error;
+ }
+
+ if (fieldtype->vtype == TYPE_ARRAY) {
+ size_t ai;
+ char *name;
+ size_t namelen;
+
+ ast_expression *elemtype;
+ int vtype;
+ ast_value *array = (ast_value*)fieldtype;
+
+ if (!ast_istype(fieldtype, ast_value)) {
+ compile_error(ast_ctx(self), "internal error: ast_value required");
+ return false;
+ }
+
+ /* we are lame now - considering the way QC works we won't tolerate arrays > 1024 elements */
+ if (!array->expression.count || array->expression.count > OPTS_OPTION_U32(OPTION_MAX_ARRAY_SIZE))
+ compile_error(ast_ctx(self), "Invalid array of size %lu", (unsigned long)array->expression.count);
+
+ elemtype = array->expression.next;
+ vtype = elemtype->vtype;
+
+ v = ir_builder_create_field(ir, self->name, vtype);
+ if (!v) {
+ compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", self->name);
+ return false;
+ }
+ v->context = ast_ctx(self);
+ v->unique_life = true;
+ v->locked = true;
+ array->ir_v = self->ir_v = v;
+ if (self->expression.flags & AST_FLAG_INCLUDE_DEF)
+ self->ir_v->flags |= IR_FLAG_INCLUDE_DEF;
+
+ namelen = strlen(self->name);
+ name = (char*)mem_a(namelen + 16);
+ util_strncpy(name, self->name, namelen);
+
+ array->ir_values = (ir_value**)mem_a(sizeof(array->ir_values[0]) * array->expression.count);
+ array->ir_values[0] = v;
+ for (ai = 1; ai < array->expression.count; ++ai) {
+ util_snprintf(name + namelen, 16, "[%u]", (unsigned int)ai);
+ array->ir_values[ai] = ir_builder_create_field(ir, name, vtype);
+ if (!array->ir_values[ai]) {
+ mem_d(name);
+ compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", name);
+ return false;
+ }
+ array->ir_values[ai]->context = ast_ctx(self);
+ array->ir_values[ai]->unique_life = true;
+ array->ir_values[ai]->locked = true;
+ if (self->expression.flags & AST_FLAG_INCLUDE_DEF)
+ self->ir_values[ai]->flags |= IR_FLAG_INCLUDE_DEF;
+ }
+ mem_d(name);
+ }
+ else
+ {
+ v = ir_builder_create_field(ir, self->name, self->expression.next->vtype);
+ if (!v)
+ return false;
+ v->context = ast_ctx(self);
+ self->ir_v = v;
+ if (self->expression.flags & AST_FLAG_INCLUDE_DEF)
+ self->ir_v->flags |= IR_FLAG_INCLUDE_DEF;
+ }
+ return true;
+ }
+
+ if (self->expression.vtype == TYPE_ARRAY) {
+ size_t ai;
+ char *name;
+ size_t namelen;
+
+ ast_expression *elemtype = self->expression.next;
+ int vtype = elemtype->vtype;
+
+ /* same as with field arrays */
+ if (!self->expression.count || self->expression.count > OPTS_OPTION_U32(OPTION_MAX_ARRAY_SIZE))
+ compile_error(ast_ctx(self), "Invalid array of size %lu", (unsigned long)self->expression.count);
+
+ v = ir_builder_create_global(ir, self->name, vtype);
+ if (!v) {
+ compile_error(ast_ctx(self), "ir_builder_create_global failed `%s`", self->name);
+ return false;
+ }
+ v->context = ast_ctx(self);
+ v->unique_life = true;
+ v->locked = true;
+ if (self->expression.flags & AST_FLAG_INCLUDE_DEF)
+ v->flags |= IR_FLAG_INCLUDE_DEF;
+
+ namelen = strlen(self->name);
+ name = (char*)mem_a(namelen + 16);
+ util_strncpy(name, self->name, namelen);
+
+ self->ir_values = (ir_value**)mem_a(sizeof(self->ir_values[0]) * self->expression.count);
+ self->ir_values[0] = v;
+ for (ai = 1; ai < self->expression.count; ++ai) {
+ util_snprintf(name + namelen, 16, "[%u]", (unsigned int)ai);
+ self->ir_values[ai] = ir_builder_create_global(ir, name, vtype);
+ if (!self->ir_values[ai]) {
+ mem_d(name);
+ compile_error(ast_ctx(self), "ir_builder_create_global failed `%s`", name);
+ return false;
+ }
+ self->ir_values[ai]->context = ast_ctx(self);
+ self->ir_values[ai]->unique_life = true;
+ self->ir_values[ai]->locked = true;
+ if (self->expression.flags & AST_FLAG_INCLUDE_DEF)
+ self->ir_values[ai]->flags |= IR_FLAG_INCLUDE_DEF;
+ }
+ mem_d(name);
+ }
+ else
+ {
+ /* Arrays don't do this since there's no "array" value which spans across the
+ * whole thing.
+ */
+ v = ir_builder_create_global(ir, self->name, self->expression.vtype);
+ if (!v) {
+ compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", self->name);
+ return false;
+ }
+ codegen_output_type(self, v);
+ v->context = ast_ctx(self);
+ }
+
+ if (self->hasvalue) {
+ switch (self->expression.vtype)
+ {
+ case TYPE_FLOAT:
+ if (!ir_value_set_float(v, self->constval.vfloat))
+ goto error;
+ break;
+ case TYPE_VECTOR:
+ if (!ir_value_set_vector(v, self->constval.vvec))
+ goto error;
+ break;
+ case TYPE_STRING:
+ if (!ir_value_set_string(v, self->constval.vstring))
+ goto error;
+ break;
+ case TYPE_ARRAY:
+ compile_error(ast_ctx(self), "TODO: global constant array");
+ break;
+ case TYPE_FUNCTION:
+ compile_error(ast_ctx(self), "global of type function not properly generated");
+ goto error;
+ /* Cannot generate an IR value for a function,
+ * need a pointer pointing to a function rather.
+ */
+ case TYPE_FIELD:
+ if (!self->constval.vfield) {
+ compile_error(ast_ctx(self), "field constant without vfield set");
+ goto error;
+ }
+ if (!self->constval.vfield->ir_v) {
+ compile_error(ast_ctx(self), "field constant generated before its field");
+ goto error;
+ }
+ if (!ir_value_set_field(v, self->constval.vfield->ir_v))
+ goto error;
+ break;
+ default:
+ compile_error(ast_ctx(self), "TODO: global constant type %i", self->expression.vtype);
+ break;
+ }
+ }
+
+ /* link us to the ir_value */
+ v->cvq = self->cvq;
+ self->ir_v = v;
+ if (self->expression.flags & AST_FLAG_INCLUDE_DEF)
+ self->ir_v->flags |= IR_FLAG_INCLUDE_DEF;
+ return true;
+
+error: /* clean up */
+ ir_value_delete(v);
+ return false;
+}
+
+static bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
+{
+ ir_value *v = NULL;
+
+ if (self->expression.vtype == TYPE_NIL) {
+ compile_error(ast_ctx(self), "internal error: trying to generate a variable of TYPE_NIL");
+ return false;
+ }
+
+ if (self->hasvalue && self->expression.vtype == TYPE_FUNCTION)
+ {
+ /* Do we allow local functions? I think not...
+ * this is NOT a function pointer atm.
+ */
+ return false;
+ }
+
+ if (self->expression.vtype == TYPE_ARRAY) {
+ size_t ai;
+ char *name;
+ size_t namelen;
+
+ ast_expression *elemtype = self->expression.next;
+ int vtype = elemtype->vtype;
+
+ func->flags |= IR_FLAG_HAS_ARRAYS;
+
+ if (param && !(self->expression.flags & AST_FLAG_IS_VARARG)) {
+ compile_error(ast_ctx(self), "array-parameters are not supported");
+ return false;
+ }
+
+ /* we are lame now - considering the way QC works we won't tolerate arrays > 1024 elements */
+ if (!self->expression.count || self->expression.count > OPTS_OPTION_U32(OPTION_MAX_ARRAY_SIZE)) {
+ compile_error(ast_ctx(self), "Invalid array of size %lu", (unsigned long)self->expression.count);
+ }
+
+ self->ir_values = (ir_value**)mem_a(sizeof(self->ir_values[0]) * self->expression.count);
+ if (!self->ir_values) {
+ compile_error(ast_ctx(self), "failed to allocate array values");
+ return false;
+ }
+
+ v = ir_function_create_local(func, self->name, vtype, param);
+ if (!v) {
+ compile_error(ast_ctx(self), "internal error: ir_function_create_local failed");
+ return false;
+ }
+ v->context = ast_ctx(self);
+ v->unique_life = true;
+ v->locked = true;
+
+ namelen = strlen(self->name);
+ name = (char*)mem_a(namelen + 16);
+ util_strncpy(name, self->name, namelen);
+
+ self->ir_values[0] = v;
+ for (ai = 1; ai < self->expression.count; ++ai) {
+ util_snprintf(name + namelen, 16, "[%u]", (unsigned int)ai);
+ self->ir_values[ai] = ir_function_create_local(func, name, vtype, param);
+ if (!self->ir_values[ai]) {
+ compile_error(ast_ctx(self), "internal_error: ir_builder_create_global failed on `%s`", name);
+ return false;
+ }
+ self->ir_values[ai]->context = ast_ctx(self);
+ self->ir_values[ai]->unique_life = true;
+ self->ir_values[ai]->locked = true;
+ }
+ mem_d(name);
+ }
+ else
+ {
+ v = ir_function_create_local(func, self->name, self->expression.vtype, param);
+ if (!v)
+ return false;
+ codegen_output_type(self, v);
+ v->context = ast_ctx(self);
+ }
+
+ /* A constant local... hmmm...
+ * I suppose the IR will have to deal with this
+ */
+ if (self->hasvalue) {
+ switch (self->expression.vtype)
+ {
+ case TYPE_FLOAT:
+ if (!ir_value_set_float(v, self->constval.vfloat))
+ goto error;
+ break;
+ case TYPE_VECTOR:
+ if (!ir_value_set_vector(v, self->constval.vvec))
+ goto error;
+ break;
+ case TYPE_STRING:
+ if (!ir_value_set_string(v, self->constval.vstring))
+ goto error;
+ break;
+ default:
+ compile_error(ast_ctx(self), "TODO: global constant type %i", self->expression.vtype);
+ break;
+ }
+ }
+
+ /* link us to the ir_value */
+ v->cvq = self->cvq;
+ self->ir_v = v;
+
+ if (!ast_generate_accessors(self, func->owner))
+ return false;
+ return true;
+
+error: /* clean up */
+ ir_value_delete(v);
+ return false;
+}
+
+bool ast_generate_accessors(ast_value *self, ir_builder *ir)
+{
+ size_t i;
+ bool warn = OPTS_WARN(WARN_USED_UNINITIALIZED);
+ if (!self->setter || !self->getter)
+ return true;
+ for (i = 0; i < self->expression.count; ++i) {
+ if (!self->ir_values) {
+ compile_error(ast_ctx(self), "internal error: no array values generated for `%s`", self->name);
+ return false;
+ }
+ if (!self->ir_values[i]) {
+ compile_error(ast_ctx(self), "internal error: not all array values have been generated for `%s`", self->name);
+ return false;
+ }
+ if (self->ir_values[i]->life) {
+ compile_error(ast_ctx(self), "internal error: function containing `%s` already generated", self->name);
+ return false;
+ }
+ }
+
+ opts_set(opts.warn, WARN_USED_UNINITIALIZED, false);
+ if (self->setter) {
+ if (!ast_global_codegen (self->setter, ir, false) ||
+ !ast_function_codegen(self->setter->constval.vfunc, ir) ||
+ !ir_function_finalize(self->setter->constval.vfunc->ir_func))
+ {
+ compile_error(ast_ctx(self), "internal error: failed to generate setter for `%s`", self->name);
+ opts_set(opts.warn, WARN_USED_UNINITIALIZED, warn);
+ return false;
+ }
+ }
+ if (self->getter) {
+ if (!ast_global_codegen (self->getter, ir, false) ||
+ !ast_function_codegen(self->getter->constval.vfunc, ir) ||
+ !ir_function_finalize(self->getter->constval.vfunc->ir_func))
+ {
+ compile_error(ast_ctx(self), "internal error: failed to generate getter for `%s`", self->name);
+ opts_set(opts.warn, WARN_USED_UNINITIALIZED, warn);
+ return false;
+ }
+ }
+ for (i = 0; i < self->expression.count; ++i) {
+ vec_free(self->ir_values[i]->life);
+ }
+ opts_set(opts.warn, WARN_USED_UNINITIALIZED, warn);
+ return true;
+}
+
+bool ast_function_codegen(ast_function *self, ir_builder *ir)
+{
+ ir_function *irf;
+ ir_value *dummy;
+ ast_expression *ec;
+ ast_expression_codegen *cgen;
+ size_t i;
+
+ (void)ir;
+
+ irf = self->ir_func;
+ if (!irf) {
+ compile_error(ast_ctx(self), "internal error: ast_function's related ast_value was not generated yet");
+ return false;
+ }
+
+ /* fill the parameter list */
+ ec = &self->vtype->expression;
+ for (i = 0; i < vec_size(ec->params); ++i)
+ {
+ if (ec->params[i]->expression.vtype == TYPE_FIELD)
+ vec_push(irf->params, ec->params[i]->expression.next->vtype);
+ else
+ vec_push(irf->params, ec->params[i]->expression.vtype);
+ if (!self->builtin) {
+ if (!ast_local_codegen(ec->params[i], self->ir_func, true))
+ return false;
+ }
+ }
+
+ if (self->varargs) {
+ if (!ast_local_codegen(self->varargs, self->ir_func, true))
+ return false;
+ irf->max_varargs = self->varargs->expression.count;
+ }
+
+ if (self->builtin) {
+ irf->builtin = self->builtin;
+ return true;
+ }
+
+ /* have a local return value variable? */
+ if (self->return_value) {
+ if (!ast_local_codegen(self->return_value, self->ir_func, false))
+ return false;
+ }
+
+ if (!vec_size(self->blocks)) {
+ compile_error(ast_ctx(self), "function `%s` has no body", self->name);
+ return false;
+ }
+
+ irf->first = self->curblock = ir_function_create_block(ast_ctx(self), irf, "entry");
+ if (!self->curblock) {
+ compile_error(ast_ctx(self), "failed to allocate entry block for `%s`", self->name);
+ return false;
+ }
+
+ if (self->argc) {
+ ir_value *va_count;
+ ir_value *fixed;
+ ir_value *sub;
+ if (!ast_local_codegen(self->argc, self->ir_func, true))
+ return false;
+ cgen = self->argc->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->argc), self, false, &va_count))
+ return false;
+ cgen = self->fixedparams->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->fixedparams), self, false, &fixed))
+ return false;
+ sub = ir_block_create_binop(self->curblock, ast_ctx(self),
+ ast_function_label(self, "va_count"), INSTR_SUB_F,
+ ir_builder_get_va_count(ir), fixed);
+ if (!sub)
+ return false;
+ if (!ir_block_create_store_op(self->curblock, ast_ctx(self), INSTR_STORE_F,
+ va_count, sub))
+ {
+ return false;
+ }
+ }
+
+ for (i = 0; i < vec_size(self->blocks); ++i) {
+ cgen = self->blocks[i]->expression.codegen;
+ if (!(*cgen)((ast_expression*)self->blocks[i], self, false, &dummy))
+ return false;
+ }
+
+ /* TODO: check return types */
+ if (!self->curblock->final)
+ {
+ if (!self->vtype->expression.next ||
+ self->vtype->expression.next->vtype == TYPE_VOID)
+ {
+ return ir_block_create_return(self->curblock, ast_ctx(self), NULL);
+ }
+ else if (vec_size(self->curblock->entries) || self->curblock == irf->first)
+ {
+ if (self->return_value) {
+ cgen = self->return_value->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->return_value), self, false, &dummy))
+ return false;
+ return ir_block_create_return(self->curblock, ast_ctx(self), dummy);
+ }
+ else if (compile_warning(ast_ctx(self), WARN_MISSING_RETURN_VALUES,
+ "control reaches end of non-void function (`%s`) via %s",
+ self->name, self->curblock->label))
+ {
+ return false;
+ }
+ return ir_block_create_return(self->curblock, ast_ctx(self), NULL);
+ }
+ }
+ return true;
+}
+
+/* Note, you will not see ast_block_codegen generate ir_blocks.
+ * To the AST and the IR, blocks are 2 different things.
+ * In the AST it represents a block of code, usually enclosed in
+ * curly braces {...}.
+ * While in the IR it represents a block in terms of control-flow.
+ */
+bool ast_block_codegen(ast_block *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ size_t i;
+
+ /* We don't use this
+ * Note: an ast-representation using the comma-operator
+ * of the form: (a, b, c) = x should not assign to c...
+ */
+ if (lvalue) {
+ compile_error(ast_ctx(self), "not an l-value (code-block)");
+ return false;
+ }
+
+ if (self->expression.outr) {
+ *out = self->expression.outr;
+ return true;
+ }
+
+ /* output is NULL at first, we'll have each expression
+ * assign to out output, thus, a comma-operator represention
+ * using an ast_block will return the last generated value,
+ * so: (b, c) + a executed both b and c, and returns c,
+ * which is then added to a.
+ */
+ *out = NULL;
+
+ /* generate locals */
+ for (i = 0; i < vec_size(self->locals); ++i)
+ {
+ if (!ast_local_codegen(self->locals[i], func->ir_func, false)) {
+ if (OPTS_OPTION_BOOL(OPTION_DEBUG))
+ compile_error(ast_ctx(self), "failed to generate local `%s`", self->locals[i]->name);
+ return false;
+ }
+ }
+
+ for (i = 0; i < vec_size(self->exprs); ++i)
+ {
+ ast_expression_codegen *gen;
+ if (func->curblock->final && !ast_istype(self->exprs[i], ast_label)) {
+ if (compile_warning(ast_ctx(self->exprs[i]), WARN_UNREACHABLE_CODE, "unreachable statement"))
+ return false;
+ continue;
+ }
+ gen = self->exprs[i]->codegen;
+ if (!(*gen)(self->exprs[i], func, false, out))
+ return false;
+ }
+
+ self->expression.outr = *out;
+
+ return true;
+}
+
+bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *left = NULL;
+ ir_value *right = NULL;
+
+ ast_value *arr;
+ ast_value *idx = 0;
+ ast_array_index *ai = NULL;
+
+ if (lvalue && self->expression.outl) {
+ *out = self->expression.outl;
+ return true;
+ }
+
+ if (!lvalue && self->expression.outr) {
+ *out = self->expression.outr;
+ return true;
+ }
+
+ if (ast_istype(self->dest, ast_array_index))
+ {
+
+ ai = (ast_array_index*)self->dest;
+ idx = (ast_value*)ai->index;
+
+ if (ast_istype(ai->index, ast_value) && idx->hasvalue && idx->cvq == CV_CONST)
+ ai = NULL;
+ }
+
+ if (ai) {
+ /* we need to call the setter */
+ ir_value *iridx, *funval;
+ ir_instr *call;
+
+ if (lvalue) {
+ compile_error(ast_ctx(self), "array-subscript assignment cannot produce lvalues");
+ return false;
+ }
+
+ arr = (ast_value*)ai->array;
+ if (!ast_istype(ai->array, ast_value) || !arr->setter) {
+ compile_error(ast_ctx(self), "value has no setter (%s)", arr->name);
+ return false;
+ }
+
+ cgen = idx->expression.codegen;
+ if (!(*cgen)((ast_expression*)(idx), func, false, &iridx))
+ return false;
+
+ cgen = arr->setter->expression.codegen;
+ if (!(*cgen)((ast_expression*)(arr->setter), func, true, &funval))
+ return false;
+
+ cgen = self->source->codegen;
+ if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
+ return false;
+
+ call = ir_block_create_call(func->curblock, ast_ctx(self), ast_function_label(func, "store"), funval, false);
+ if (!call)
+ return false;
+ ir_call_param(call, iridx);
+ ir_call_param(call, right);
+ self->expression.outr = right;
+ }
+ else
+ {
+ /* regular code */
+
+ cgen = self->dest->codegen;
+ /* lvalue! */
+ if (!(*cgen)((ast_expression*)(self->dest), func, true, &left))
+ return false;
+ self->expression.outl = left;
+
+ cgen = self->source->codegen;
+ /* rvalue! */
+ if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
+ return false;
+
+ if (!ir_block_create_store_op(func->curblock, ast_ctx(self), self->op, left, right))
+ return false;
+ self->expression.outr = right;
+ }
+
+ /* Theoretically, an assinment returns its left side as an
+ * lvalue, if we don't need an lvalue though, we return
+ * the right side as an rvalue, otherwise we have to
+ * somehow know whether or not we need to dereference the pointer
+ * on the left side - that is: OP_LOAD if it was an address.
+ * Also: in original QC we cannot OP_LOADP *anyway*.
+ */
+ *out = (lvalue ? left : right);
+
+ return true;
+}
+
+bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *left, *right;
+
+ /* A binary operation cannot yield an l-value */
+ if (lvalue) {
+ compile_error(ast_ctx(self), "not an l-value (binop)");
+ return false;
+ }
+
+ if (self->expression.outr) {
+ *out = self->expression.outr;
+ return true;
+ }
+
+ if ((OPTS_FLAG(SHORT_LOGIC) || OPTS_FLAG(PERL_LOGIC)) &&
+ (self->op == INSTR_AND || self->op == INSTR_OR))
+ {
+ /* short circuit evaluation */
+ ir_block *other, *merge;
+ ir_block *from_left, *from_right;
+ ir_instr *phi;
+ size_t merge_id;
+
+ /* prepare end-block */
+ merge_id = vec_size(func->ir_func->blocks);
+ merge = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "sce_merge"));
+
+ /* generate the left expression */
+ cgen = self->left->codegen;
+ if (!(*cgen)((ast_expression*)(self->left), func, false, &left))
+ return false;
+ /* remember the block */
+ from_left = func->curblock;
+
+ /* create a new block for the right expression */
+ other = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "sce_other"));
+ if (self->op == INSTR_AND) {
+ /* on AND: left==true -> other */
+ if (!ir_block_create_if(func->curblock, ast_ctx(self), left, other, merge))
+ return false;
+ } else {
+ /* on OR: left==false -> other */
+ if (!ir_block_create_if(func->curblock, ast_ctx(self), left, merge, other))
+ return false;
+ }
+ /* use the likely flag */
+ vec_last(func->curblock->instr)->likely = true;
+
+ /* enter the right-expression's block */
+ func->curblock = other;
+ /* generate */
+ cgen = self->right->codegen;
+ if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
+ return false;
+ /* remember block */
+ from_right = func->curblock;
+
+ /* jump to the merge block */
+ if (!ir_block_create_jump(func->curblock, ast_ctx(self), merge))
+ return false;
+
+ vec_remove(func->ir_func->blocks, merge_id, 1);
+ vec_push(func->ir_func->blocks, merge);
+
+ func->curblock = merge;
+ phi = ir_block_create_phi(func->curblock, ast_ctx(self),
+ ast_function_label(func, "sce_value"),
+ self->expression.vtype);
+ ir_phi_add(phi, from_left, left);
+ ir_phi_add(phi, from_right, right);
+ *out = ir_phi_value(phi);
+ if (!*out)
+ return false;
+
+ if (!OPTS_FLAG(PERL_LOGIC)) {
+ /* cast-to-bool */
+ if (OPTS_FLAG(CORRECT_LOGIC) && (*out)->vtype == TYPE_VECTOR) {
+ *out = ir_block_create_unary(func->curblock, ast_ctx(self),
+ ast_function_label(func, "sce_bool_v"),
+ INSTR_NOT_V, *out);
+ if (!*out)
+ return false;
+ *out = ir_block_create_unary(func->curblock, ast_ctx(self),
+ ast_function_label(func, "sce_bool"),
+ INSTR_NOT_F, *out);
+ if (!*out)
+ return false;
+ }
+ else if (OPTS_FLAG(FALSE_EMPTY_STRINGS) && (*out)->vtype == TYPE_STRING) {
+ *out = ir_block_create_unary(func->curblock, ast_ctx(self),
+ ast_function_label(func, "sce_bool_s"),
+ INSTR_NOT_S, *out);
+ if (!*out)
+ return false;
+ *out = ir_block_create_unary(func->curblock, ast_ctx(self),
+ ast_function_label(func, "sce_bool"),
+ INSTR_NOT_F, *out);
+ if (!*out)
+ return false;
+ }
+ else {
+ *out = ir_block_create_binop(func->curblock, ast_ctx(self),
+ ast_function_label(func, "sce_bool"),
+ INSTR_AND, *out, *out);
+ if (!*out)
+ return false;
+ }
+ }
+
+ self->expression.outr = *out;
+ codegen_output_type(self, *out);
+ return true;
+ }
+
+ cgen = self->left->codegen;
+ if (!(*cgen)((ast_expression*)(self->left), func, false, &left))
+ return false;
+
+ cgen = self->right->codegen;
+ if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
+ return false;
+
+ *out = ir_block_create_binop(func->curblock, ast_ctx(self), ast_function_label(func, "bin"),
+ self->op, left, right);
+ if (!*out)
+ return false;
+ self->expression.outr = *out;
+ codegen_output_type(self, *out);
+
+ return true;
+}
+
+bool ast_binstore_codegen(ast_binstore *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *leftl = NULL, *leftr, *right, *bin;
+
+ ast_value *arr;
+ ast_value *idx = 0;
+ ast_array_index *ai = NULL;
+ ir_value *iridx = NULL;
+
+ if (lvalue && self->expression.outl) {
+ *out = self->expression.outl;
+ return true;
+ }
+
+ if (!lvalue && self->expression.outr) {
+ *out = self->expression.outr;
+ return true;
+ }
+
+ if (ast_istype(self->dest, ast_array_index))
+ {
+
+ ai = (ast_array_index*)self->dest;
+ idx = (ast_value*)ai->index;
+
+ if (ast_istype(ai->index, ast_value) && idx->hasvalue && idx->cvq == CV_CONST)
+ ai = NULL;
+ }
+
+ /* for a binstore we need both an lvalue and an rvalue for the left side */
+ /* rvalue of destination! */
+ if (ai) {
+ cgen = idx->expression.codegen;
+ if (!(*cgen)((ast_expression*)(idx), func, false, &iridx))
+ return false;
+ }
+ cgen = self->dest->codegen;
+ if (!(*cgen)((ast_expression*)(self->dest), func, false, &leftr))
+ return false;
+
+ /* source as rvalue only */
+ cgen = self->source->codegen;
+ if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
+ return false;
+
+ /* now the binary */
+ bin = ir_block_create_binop(func->curblock, ast_ctx(self), ast_function_label(func, "binst"),
+ self->opbin, leftr, right);
+ self->expression.outr = bin;
+
+
+ if (ai) {
+ /* we need to call the setter */
+ ir_value *funval;
+ ir_instr *call;
+
+ if (lvalue) {
+ compile_error(ast_ctx(self), "array-subscript assignment cannot produce lvalues");
+ return false;
+ }
+
+ arr = (ast_value*)ai->array;
+ if (!ast_istype(ai->array, ast_value) || !arr->setter) {
+ compile_error(ast_ctx(self), "value has no setter (%s)", arr->name);
+ return false;
+ }
+
+ cgen = arr->setter->expression.codegen;
+ if (!(*cgen)((ast_expression*)(arr->setter), func, true, &funval))
+ return false;
+
+ call = ir_block_create_call(func->curblock, ast_ctx(self), ast_function_label(func, "store"), funval, false);
+ if (!call)
+ return false;
+ ir_call_param(call, iridx);
+ ir_call_param(call, bin);
+ self->expression.outr = bin;
+ } else {
+ /* now store them */
+ cgen = self->dest->codegen;
+ /* lvalue of destination */
+ if (!(*cgen)((ast_expression*)(self->dest), func, true, &leftl))
+ return false;
+ self->expression.outl = leftl;
+
+ if (!ir_block_create_store_op(func->curblock, ast_ctx(self), self->opstore, leftl, bin))
+ return false;
+ self->expression.outr = bin;
+ }
+
+ /* Theoretically, an assinment returns its left side as an
+ * lvalue, if we don't need an lvalue though, we return
+ * the right side as an rvalue, otherwise we have to
+ * somehow know whether or not we need to dereference the pointer
+ * on the left side - that is: OP_LOAD if it was an address.
+ * Also: in original QC we cannot OP_LOADP *anyway*.
+ */
+ *out = (lvalue ? leftl : bin);
+
+ return true;
+}
+
+bool ast_unary_codegen(ast_unary *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *operand;
+
+ /* An unary operation cannot yield an l-value */
+ if (lvalue) {
+ compile_error(ast_ctx(self), "not an l-value (binop)");
+ return false;
+ }
+
+ if (self->expression.outr) {
+ *out = self->expression.outr;
+ return true;
+ }
+
+ cgen = self->operand->codegen;
+ /* lvalue! */
+ if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
+ return false;
+
+ *out = ir_block_create_unary(func->curblock, ast_ctx(self), ast_function_label(func, "unary"),
+ self->op, operand);
+ if (!*out)
+ return false;
+ self->expression.outr = *out;
+
+ return true;
+}
+
+bool ast_return_codegen(ast_return *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *operand;
+
+ *out = NULL;
+
+ /* In the context of a return operation, we don't actually return
+ * anything...
+ */
+ if (lvalue) {
+ compile_error(ast_ctx(self), "return-expression is not an l-value");
+ return false;
+ }
+
+ if (self->expression.outr) {
+ compile_error(ast_ctx(self), "internal error: ast_return cannot be reused, it bears no result!");
+ return false;
+ }
+ self->expression.outr = (ir_value*)1;
+
+ if (self->operand) {
+ cgen = self->operand->codegen;
+ /* lvalue! */
+ if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
+ return false;
+
+ if (!ir_block_create_return(func->curblock, ast_ctx(self), operand))
+ return false;
+ } else {
+ if (!ir_block_create_return(func->curblock, ast_ctx(self), NULL))
+ return false;
+ }
+
+ return true;
+}
+
+bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *ent, *field;
+
+ /* This function needs to take the 'lvalue' flag into account!
+ * As lvalue we provide a field-pointer, as rvalue we provide the
+ * value in a temp.
+ */
+
+ if (lvalue && self->expression.outl) {
+ *out = self->expression.outl;
+ return true;
+ }
+
+ if (!lvalue && self->expression.outr) {
+ *out = self->expression.outr;
+ return true;
+ }
+
+ cgen = self->entity->codegen;
+ if (!(*cgen)((ast_expression*)(self->entity), func, false, &ent))
+ return false;
+
+ cgen = self->field->codegen;
+ if (!(*cgen)((ast_expression*)(self->field), func, false, &field))
+ return false;
+
+ if (lvalue) {
+ /* address! */
+ *out = ir_block_create_fieldaddress(func->curblock, ast_ctx(self), ast_function_label(func, "efa"),
+ ent, field);
+ } else {
+ *out = ir_block_create_load_from_ent(func->curblock, ast_ctx(self), ast_function_label(func, "efv"),
+ ent, field, self->expression.vtype);
+ /* Done AFTER error checking:
+ codegen_output_type(self, *out);
+ */
+ }
+ if (!*out) {
+ compile_error(ast_ctx(self), "failed to create %s instruction (output type %s)",
+ (lvalue ? "ADDRESS" : "FIELD"),
+ type_name[self->expression.vtype]);
+ return false;
+ }
+ if (!lvalue)
+ codegen_output_type(self, *out);
+
+ if (lvalue)
+ self->expression.outl = *out;
+ else
+ self->expression.outr = *out;
+
+ /* Hm that should be it... */
+ return true;
+}
+
+bool ast_member_codegen(ast_member *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *vec;
+
+ /* in QC this is always an lvalue */
+ if (lvalue && self->rvalue) {
+ compile_error(ast_ctx(self), "not an l-value (member access)");
+ return false;
+ }
+ if (self->expression.outl) {
+ *out = self->expression.outl;
+ return true;
+ }
+
+ cgen = self->owner->codegen;
+ if (!(*cgen)((ast_expression*)(self->owner), func, false, &vec))
+ return false;
+
+ if (vec->vtype != TYPE_VECTOR &&
+ !(vec->vtype == TYPE_FIELD && self->owner->next->vtype == TYPE_VECTOR))
+ {
+ return false;
+ }
+
+ *out = ir_value_vector_member(vec, self->field);
+ self->expression.outl = *out;
+
+ return (*out != NULL);
+}
+
+bool ast_array_index_codegen(ast_array_index *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_value *arr;
+ ast_value *idx;
+
+ if (!lvalue && self->expression.outr) {
+ *out = self->expression.outr;
+ return true;
+ }
+ if (lvalue && self->expression.outl) {
+ *out = self->expression.outl;
+ return true;
+ }
+
+ if (!ast_istype(self->array, ast_value)) {
+ compile_error(ast_ctx(self), "array indexing this way is not supported");
+ /* note this would actually be pointer indexing because the left side is
+ * not an actual array but (hopefully) an indexable expression.
+ * Once we get integer arithmetic, and GADDRESS/GSTORE/GLOAD instruction
+ * support this path will be filled.
+ */
+ return false;
+ }
+
+ arr = (ast_value*)self->array;
+ idx = (ast_value*)self->index;
+
+ if (!ast_istype(self->index, ast_value) || !idx->hasvalue || idx->cvq != CV_CONST) {
+ /* Time to use accessor functions */
+ ast_expression_codegen *cgen;
+ ir_value *iridx, *funval;
+ ir_instr *call;
+
+ if (lvalue) {
+ compile_error(ast_ctx(self), "(.2) array indexing here needs a compile-time constant");
+ return false;
+ }
+
+ if (!arr->getter) {
+ compile_error(ast_ctx(self), "value has no getter, don't know how to index it");
+ return false;
+ }
+
+ cgen = self->index->codegen;
+ if (!(*cgen)((ast_expression*)(self->index), func, false, &iridx))
+ return false;
+
+ cgen = arr->getter->expression.codegen;
+ if (!(*cgen)((ast_expression*)(arr->getter), func, true, &funval))
+ return false;
+
+ call = ir_block_create_call(func->curblock, ast_ctx(self), ast_function_label(func, "fetch"), funval, false);
+ if (!call)
+ return false;
+ ir_call_param(call, iridx);
+
+ *out = ir_call_value(call);
+ self->expression.outr = *out;
+ (*out)->vtype = self->expression.vtype;
+ codegen_output_type(self, *out);
+ return true;
+ }
+
+ if (idx->expression.vtype == TYPE_FLOAT) {
+ unsigned int arridx = idx->constval.vfloat;
+ if (arridx >= self->array->count)
+ {
+ compile_error(ast_ctx(self), "array index out of bounds: %i", arridx);
+ return false;
+ }
+ *out = arr->ir_values[arridx];
+ }
+ else if (idx->expression.vtype == TYPE_INTEGER) {
+ unsigned int arridx = idx->constval.vint;
+ if (arridx >= self->array->count)
+ {
+ compile_error(ast_ctx(self), "array index out of bounds: %i", arridx);
+ return false;
+ }
+ *out = arr->ir_values[arridx];
+ }
+ else {
+ compile_error(ast_ctx(self), "array indexing here needs an integer constant");
+ return false;
+ }
+ (*out)->vtype = self->expression.vtype;
+ codegen_output_type(self, *out);
+ return true;
+}
+
+bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+
+ ir_value *condval;
+ ir_value *dummy;
+
+ ir_block *cond;
+ ir_block *ontrue;
+ ir_block *onfalse;
+ ir_block *ontrue_endblock = NULL;
+ ir_block *onfalse_endblock = NULL;
+ ir_block *merge = NULL;
+
+ /* We don't output any value, thus also don't care about r/lvalue */
+ (void)out;
+ (void)lvalue;
+
+ if (self->expression.outr) {
+ compile_error(ast_ctx(self), "internal error: ast_ifthen cannot be reused, it bears no result!");
+ return false;
+ }
+ self->expression.outr = (ir_value*)1;
+
+ /* generate the condition */
+ cgen = self->cond->codegen;
+ if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
+ return false;
+ /* update the block which will get the jump - because short-logic or ternaries may have changed this */
+ cond = func->curblock;
+
+ /* on-true path */
+
+ if (self->on_true) {
+ /* create on-true block */
+ ontrue = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "ontrue"));
+ if (!ontrue)
+ return false;
+
+ /* enter the block */
+ func->curblock = ontrue;
+
+ /* generate */
+ cgen = self->on_true->codegen;
+ if (!(*cgen)((ast_expression*)(self->on_true), func, false, &dummy))
+ return false;
+
+ /* we now need to work from the current endpoint */
+ ontrue_endblock = func->curblock;
+ } else
+ ontrue = NULL;
+
+ /* on-false path */
+ if (self->on_false) {
+ /* create on-false block */
+ onfalse = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "onfalse"));
+ if (!onfalse)
+ return false;
+
+ /* enter the block */
+ func->curblock = onfalse;
+
+ /* generate */
+ cgen = self->on_false->codegen;
+ if (!(*cgen)((ast_expression*)(self->on_false), func, false, &dummy))
+ return false;
+
+ /* we now need to work from the current endpoint */
+ onfalse_endblock = func->curblock;
+ } else
+ onfalse = NULL;
+
+ /* Merge block were they all merge in to */
+ if (!ontrue || !onfalse || !ontrue_endblock->final || !onfalse_endblock->final)
+ {
+ merge = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "endif"));
+ if (!merge)
+ return false;
+ /* add jumps ot the merge block */
+ if (ontrue && !ontrue_endblock->final && !ir_block_create_jump(ontrue_endblock, ast_ctx(self), merge))
+ return false;
+ if (onfalse && !onfalse_endblock->final && !ir_block_create_jump(onfalse_endblock, ast_ctx(self), merge))
+ return false;
+
+ /* Now enter the merge block */
+ func->curblock = merge;
+ }
+
+ /* we create the if here, that way all blocks are ordered :)
+ */
+ if (!ir_block_create_if(cond, ast_ctx(self), condval,
+ (ontrue ? ontrue : merge),
+ (onfalse ? onfalse : merge)))
+ {
+ return false;
+ }
+
+ return true;
+}
+
+bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+
+ ir_value *condval;
+ ir_value *trueval, *falseval;
+ ir_instr *phi;
+
+ ir_block *cond = func->curblock;
+ ir_block *cond_out = NULL;
+ ir_block *ontrue, *ontrue_out = NULL;
+ ir_block *onfalse, *onfalse_out = NULL;
+ ir_block *merge;
+
+ /* Ternary can never create an lvalue... */
+ if (lvalue)
+ return false;
+
+ /* In theory it shouldn't be possible to pass through a node twice, but
+ * in case we add any kind of optimization pass for the AST itself, it
+ * may still happen, thus we remember a created ir_value and simply return one
+ * if it already exists.
+ */
+ if (self->expression.outr) {
+ *out = self->expression.outr;
+ return true;
+ }
+
+ /* In the following, contraty to ast_ifthen, we assume both paths exist. */
+
+ /* generate the condition */
+ func->curblock = cond;
+ cgen = self->cond->codegen;
+ if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
+ return false;
+ cond_out = func->curblock;
+
+ /* create on-true block */
+ ontrue = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "tern_T"));
+ if (!ontrue)
+ return false;
+ else
+ {
+ /* enter the block */
+ func->curblock = ontrue;
+
+ /* generate */
+ cgen = self->on_true->codegen;
+ if (!(*cgen)((ast_expression*)(self->on_true), func, false, &trueval))
+ return false;
+
+ ontrue_out = func->curblock;
+ }
+
+ /* create on-false block */
+ onfalse = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "tern_F"));
+ if (!onfalse)
+ return false;
+ else
+ {
+ /* enter the block */
+ func->curblock = onfalse;
+
+ /* generate */
+ cgen = self->on_false->codegen;
+ if (!(*cgen)((ast_expression*)(self->on_false), func, false, &falseval))
+ return false;
+
+ onfalse_out = func->curblock;
+ }
+
+ /* create merge block */
+ merge = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "tern_out"));
+ if (!merge)
+ return false;
+ /* jump to merge block */
+ if (!ir_block_create_jump(ontrue_out, ast_ctx(self), merge))
+ return false;
+ if (!ir_block_create_jump(onfalse_out, ast_ctx(self), merge))
+ return false;
+
+ /* create if instruction */
+ if (!ir_block_create_if(cond_out, ast_ctx(self), condval, ontrue, onfalse))
+ return false;
+
+ /* Now enter the merge block */
+ func->curblock = merge;
+
+ /* Here, now, we need a PHI node
+ * but first some sanity checking...
+ */
+ if (trueval->vtype != falseval->vtype && trueval->vtype != TYPE_NIL && falseval->vtype != TYPE_NIL) {
+ /* error("ternary with different types on the two sides"); */
+ compile_error(ast_ctx(self), "internal error: ternary operand types invalid");
+ return false;
+ }
+
+ /* create PHI */
+ phi = ir_block_create_phi(merge, ast_ctx(self), ast_function_label(func, "phi"), self->expression.vtype);
+ if (!phi) {
+ compile_error(ast_ctx(self), "internal error: failed to generate phi node");
+ return false;
+ }
+ ir_phi_add(phi, ontrue_out, trueval);
+ ir_phi_add(phi, onfalse_out, falseval);
+
+ self->expression.outr = ir_phi_value(phi);
+ *out = self->expression.outr;
+
+ codegen_output_type(self, *out);
+
+ return true;
+}
+
+bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+
+ ir_value *dummy = NULL;
+ ir_value *precond = NULL;
+ ir_value *postcond = NULL;
+
+ /* Since we insert some jumps "late" so we have blocks
+ * ordered "nicely", we need to keep track of the actual end-blocks
+ * of expressions to add the jumps to.
+ */
+ ir_block *bbody = NULL, *end_bbody = NULL;
+ ir_block *bprecond = NULL, *end_bprecond = NULL;
+ ir_block *bpostcond = NULL, *end_bpostcond = NULL;
+ ir_block *bincrement = NULL, *end_bincrement = NULL;
+ ir_block *bout = NULL, *bin = NULL;
+
+ /* let's at least move the outgoing block to the end */
+ size_t bout_id;
+
+ /* 'break' and 'continue' need to be able to find the right blocks */
+ ir_block *bcontinue = NULL;
+ ir_block *bbreak = NULL;
+
+ ir_block *tmpblock = NULL;
+
+ (void)lvalue;
+ (void)out;
+
+ if (self->expression.outr) {
+ compile_error(ast_ctx(self), "internal error: ast_loop cannot be reused, it bears no result!");
+ return false;
+ }
+ self->expression.outr = (ir_value*)1;
+
+ /* NOTE:
+ * Should we ever need some kind of block ordering, better make this function
+ * move blocks around than write a block ordering algorithm later... after all
+ * the ast and ir should work together, not against each other.
+ */
+
+ /* initexpr doesn't get its own block, it's pointless, it could create more blocks
+ * anyway if for example it contains a ternary.
+ */
+ if (self->initexpr)
+ {
+ cgen = self->initexpr->codegen;
+ if (!(*cgen)((ast_expression*)(self->initexpr), func, false, &dummy))
+ return false;
+ }
+
+ /* Store the block from which we enter this chaos */
+ bin = func->curblock;
+
+ /* The pre-loop condition needs its own block since we
+ * need to be able to jump to the start of that expression.
+ */
+ if (self->precond)
+ {
+ bprecond = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "pre_loop_cond"));
+ if (!bprecond)
+ return false;
+
+ /* the pre-loop-condition the least important place to 'continue' at */
+ bcontinue = bprecond;
+
+ /* enter */
+ func->curblock = bprecond;
+
+ /* generate */
+ cgen = self->precond->codegen;
+ if (!(*cgen)((ast_expression*)(self->precond), func, false, &precond))
+ return false;
+
+ end_bprecond = func->curblock;
+ } else {
+ bprecond = end_bprecond = NULL;
+ }
+
+ /* Now the next blocks won't be ordered nicely, but we need to
+ * generate them this early for 'break' and 'continue'.
+ */
+ if (self->increment) {
+ bincrement = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "loop_increment"));
+ if (!bincrement)
+ return false;
+ bcontinue = bincrement; /* increment comes before the pre-loop-condition */
+ } else {
+ bincrement = end_bincrement = NULL;
+ }
+
+ if (self->postcond) {
+ bpostcond = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "post_loop_cond"));
+ if (!bpostcond)
+ return false;
+ bcontinue = bpostcond; /* postcond comes before the increment */
+ } else {
+ bpostcond = end_bpostcond = NULL;
+ }
+
+ bout_id = vec_size(func->ir_func->blocks);
+ bout = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "after_loop"));
+ if (!bout)
+ return false;
+ bbreak = bout;
+
+ /* The loop body... */
+ /* if (self->body) */
+ {
+ bbody = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "loop_body"));
+ if (!bbody)
+ return false;
+
+ /* enter */
+ func->curblock = bbody;
+
+ vec_push(func->breakblocks, bbreak);
+ if (bcontinue)
+ vec_push(func->continueblocks, bcontinue);
+ else
+ vec_push(func->continueblocks, bbody);
+
+ /* generate */
+ if (self->body) {
+ cgen = self->body->codegen;
+ if (!(*cgen)((ast_expression*)(self->body), func, false, &dummy))
+ return false;
+ }
+
+ end_bbody = func->curblock;
+ vec_pop(func->breakblocks);
+ vec_pop(func->continueblocks);
+ }
+
+ /* post-loop-condition */
+ if (self->postcond)
+ {
+ /* enter */
+ func->curblock = bpostcond;
+
+ /* generate */
+ cgen = self->postcond->codegen;
+ if (!(*cgen)((ast_expression*)(self->postcond), func, false, &postcond))
+ return false;
+
+ end_bpostcond = func->curblock;
+ }
+
+ /* The incrementor */
+ if (self->increment)
+ {
+ /* enter */
+ func->curblock = bincrement;
+
+ /* generate */
+ cgen = self->increment->codegen;
+ if (!(*cgen)((ast_expression*)(self->increment), func, false, &dummy))
+ return false;
+
+ end_bincrement = func->curblock;
+ }
+
+ /* In any case now, we continue from the outgoing block */
+ func->curblock = bout;
+
+ /* Now all blocks are in place */
+ /* From 'bin' we jump to whatever comes first */
+ if (bprecond) tmpblock = bprecond;
+ else if (bbody) tmpblock = bbody;
+ else if (bpostcond) tmpblock = bpostcond;
+ else tmpblock = bout;
+ if (!ir_block_create_jump(bin, ast_ctx(self), tmpblock))
+ return false;
+
+ /* From precond */
+ if (bprecond)
+ {
+ ir_block *ontrue, *onfalse;
+ if (bbody) ontrue = bbody;
+ else if (bincrement) ontrue = bincrement;
+ else if (bpostcond) ontrue = bpostcond;
+ else ontrue = bprecond;
+ onfalse = bout;
+ if (self->pre_not) {
+ tmpblock = ontrue;
+ ontrue = onfalse;
+ onfalse = tmpblock;
+ }
+ if (!ir_block_create_if(end_bprecond, ast_ctx(self), precond, ontrue, onfalse))
+ return false;
+ }
+
+ /* from body */
+ if (bbody)
+ {
+ if (bincrement) tmpblock = bincrement;
+ else if (bpostcond) tmpblock = bpostcond;
+ else if (bprecond) tmpblock = bprecond;
+ else tmpblock = bbody;
+ if (!end_bbody->final && !ir_block_create_jump(end_bbody, ast_ctx(self), tmpblock))
+ return false;
+ }
+
+ /* from increment */
+ if (bincrement)
+ {
+ if (bpostcond) tmpblock = bpostcond;
+ else if (bprecond) tmpblock = bprecond;
+ else if (bbody) tmpblock = bbody;
+ else tmpblock = bout;
+ if (!ir_block_create_jump(end_bincrement, ast_ctx(self), tmpblock))
+ return false;
+ }
+
+ /* from postcond */
+ if (bpostcond)
+ {
+ ir_block *ontrue, *onfalse;
+ if (bprecond) ontrue = bprecond;
+ else if (bbody) ontrue = bbody;
+ else if (bincrement) ontrue = bincrement;
+ else ontrue = bpostcond;
+ onfalse = bout;
+ if (self->post_not) {
+ tmpblock = ontrue;
+ ontrue = onfalse;
+ onfalse = tmpblock;
+ }
+ if (!ir_block_create_if(end_bpostcond, ast_ctx(self), postcond, ontrue, onfalse))
+ return false;
+ }
+
+ /* Move 'bout' to the end */
+ vec_remove(func->ir_func->blocks, bout_id, 1);
+ vec_push(func->ir_func->blocks, bout);
+
+ return true;
+}
+
+bool ast_breakcont_codegen(ast_breakcont *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ir_block *target;
+
+ *out = NULL;
+
+ if (lvalue) {
+ compile_error(ast_ctx(self), "break/continue expression is not an l-value");
+ return false;
+ }
+
+ if (self->expression.outr) {
+ compile_error(ast_ctx(self), "internal error: ast_breakcont cannot be reused!");
+ return false;
+ }
+ self->expression.outr = (ir_value*)1;
+
+ if (self->is_continue)
+ target = func->continueblocks[vec_size(func->continueblocks)-1-self->levels];
+ else
+ target = func->breakblocks[vec_size(func->breakblocks)-1-self->levels];
+
+ if (!target) {
+ compile_error(ast_ctx(self), "%s is lacking a target block", (self->is_continue ? "continue" : "break"));
+ return false;
+ }
+
+ if (!ir_block_create_jump(func->curblock, ast_ctx(self), target))
+ return false;
+ return true;
+}
+
+bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+
+ ast_switch_case *def_case = NULL;
+ ir_block *def_bfall = NULL;
+ ir_block *def_bfall_to = NULL;
+ bool set_def_bfall_to = false;
+
+ ir_value *dummy = NULL;
+ ir_value *irop = NULL;
+ ir_block *bout = NULL;
+ ir_block *bfall = NULL;
+ size_t bout_id;
+ size_t c;
+
+ char typestr[1024];
+ uint16_t cmpinstr;
+
+ if (lvalue) {
+ compile_error(ast_ctx(self), "switch expression is not an l-value");
+ return false;
+ }
+
+ if (self->expression.outr) {
+ compile_error(ast_ctx(self), "internal error: ast_switch cannot be reused!");
+ return false;
+ }
+ self->expression.outr = (ir_value*)1;
+
+ (void)lvalue;
+ (void)out;
+
+ cgen = self->operand->codegen;
+ if (!(*cgen)((ast_expression*)(self->operand), func, false, &irop))
+ return false;
+
+ if (!vec_size(self->cases))
+ return true;
+
+ cmpinstr = type_eq_instr[irop->vtype];
+ if (cmpinstr >= VINSTR_END) {
+ ast_type_to_string(self->operand, typestr, sizeof(typestr));
+ compile_error(ast_ctx(self), "invalid type to perform a switch on: %s", typestr);
+ return false;
+ }
+
+ bout_id = vec_size(func->ir_func->blocks);
+ bout = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "after_switch"));
+ if (!bout)
+ return false;
+
+ /* setup the break block */
+ vec_push(func->breakblocks, bout);
+
+ /* Now create all cases */
+ for (c = 0; c < vec_size(self->cases); ++c) {
+ ir_value *cond, *val;
+ ir_block *bcase, *bnot;
+ size_t bnot_id;
+
+ ast_switch_case *swcase = &self->cases[c];
+
+ if (swcase->value) {
+ /* A regular case */
+ /* generate the condition operand */
+ cgen = swcase->value->codegen;
+ if (!(*cgen)((ast_expression*)(swcase->value), func, false, &val))
+ return false;
+ /* generate the condition */
+ cond = ir_block_create_binop(func->curblock, ast_ctx(self), ast_function_label(func, "switch_eq"), cmpinstr, irop, val);
+ if (!cond)
+ return false;
+
+ bcase = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "case"));
+ bnot_id = vec_size(func->ir_func->blocks);
+ bnot = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "not_case"));
+ if (!bcase || !bnot)
+ return false;
+ if (set_def_bfall_to) {
+ set_def_bfall_to = false;
+ def_bfall_to = bcase;
+ }
+ if (!ir_block_create_if(func->curblock, ast_ctx(self), cond, bcase, bnot))
+ return false;
+
+ /* Make the previous case-end fall through */
+ if (bfall && !bfall->final) {
+ if (!ir_block_create_jump(bfall, ast_ctx(self), bcase))
+ return false;
+ }
+
+ /* enter the case */
+ func->curblock = bcase;
+ cgen = swcase->code->codegen;
+ if (!(*cgen)((ast_expression*)swcase->code, func, false, &dummy))
+ return false;
+
+ /* remember this block to fall through from */
+ bfall = func->curblock;
+
+ /* enter the else and move it down */
+ func->curblock = bnot;
+ vec_remove(func->ir_func->blocks, bnot_id, 1);
+ vec_push(func->ir_func->blocks, bnot);
+ } else {
+ /* The default case */
+ /* Remember where to fall through from: */
+ def_bfall = bfall;
+ bfall = NULL;
+ /* remember which case it was */
+ def_case = swcase;
+ /* And the next case will be remembered */
+ set_def_bfall_to = true;
+ }
+ }
+
+ /* Jump from the last bnot to bout */
+ if (bfall && !bfall->final && !ir_block_create_jump(bfall, ast_ctx(self), bout)) {
+ /*
+ astwarning(ast_ctx(bfall), WARN_???, "missing break after last case");
+ */
+ return false;
+ }
+
+ /* If there was a default case, put it down here */
+ if (def_case) {
+ ir_block *bcase;
+
+ /* No need to create an extra block */
+ bcase = func->curblock;
+
+ /* Insert the fallthrough jump */
+ if (def_bfall && !def_bfall->final) {
+ if (!ir_block_create_jump(def_bfall, ast_ctx(self), bcase))
+ return false;
+ }
+
+ /* Now generate the default code */
+ cgen = def_case->code->codegen;
+ if (!(*cgen)((ast_expression*)def_case->code, func, false, &dummy))
+ return false;
+
+ /* see if we need to fall through */
+ if (def_bfall_to && !func->curblock->final)
+ {
+ if (!ir_block_create_jump(func->curblock, ast_ctx(self), def_bfall_to))
+ return false;
+ }
+ }
+
+ /* Jump from the last bnot to bout */
+ if (!func->curblock->final && !ir_block_create_jump(func->curblock, ast_ctx(self), bout))
+ return false;
+ /* enter the outgoing block */
+ func->curblock = bout;
+
+ /* restore the break block */
+ vec_pop(func->breakblocks);
+
+ /* Move 'bout' to the end, it's nicer */
+ vec_remove(func->ir_func->blocks, bout_id, 1);
+ vec_push(func->ir_func->blocks, bout);
+
+ return true;
+}
+
+bool ast_label_codegen(ast_label *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ size_t i;
+ ir_value *dummy;
+
+ if (self->undefined) {
+ compile_error(ast_ctx(self), "internal error: ast_label never defined");
+ return false;
+ }
+
+ *out = NULL;
+ if (lvalue) {
+ compile_error(ast_ctx(self), "internal error: ast_label cannot be an lvalue");
+ return false;
+ }
+
+ /* simply create a new block and jump to it */
+ self->irblock = ir_function_create_block(ast_ctx(self), func->ir_func, self->name);
+ if (!self->irblock) {
+ compile_error(ast_ctx(self), "failed to allocate label block `%s`", self->name);
+ return false;
+ }
+ if (!func->curblock->final) {
+ if (!ir_block_create_jump(func->curblock, ast_ctx(self), self->irblock))
+ return false;
+ }
+
+ /* enter the new block */
+ func->curblock = self->irblock;
+
+ /* Generate all the leftover gotos */
+ for (i = 0; i < vec_size(self->gotos); ++i) {
+ if (!ast_goto_codegen(self->gotos[i], func, false, &dummy))
+ return false;
+ }
+
+ return true;
+}
+
+bool ast_goto_codegen(ast_goto *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ *out = NULL;
+ if (lvalue) {
+ compile_error(ast_ctx(self), "internal error: ast_goto cannot be an lvalue");
+ return false;
+ }
+
+ if (self->target->irblock) {
+ if (self->irblock_from) {
+ /* we already tried once, this is the callback */
+ self->irblock_from->final = false;
+ if (!ir_block_create_goto(self->irblock_from, ast_ctx(self), self->target->irblock)) {
+ compile_error(ast_ctx(self), "failed to generate goto to `%s`", self->name);
+ return false;
+ }
+ }
+ else
+ {
+ if (!ir_block_create_goto(func->curblock, ast_ctx(self), self->target->irblock)) {
+ compile_error(ast_ctx(self), "failed to generate goto to `%s`", self->name);
+ return false;
+ }
+ }
+ }
+ else
+ {
+ /* the target has not yet been created...
+ * close this block in a sneaky way:
+ */
+ func->curblock->final = true;
+ self->irblock_from = func->curblock;
+ ast_label_register_goto(self->target, self);
+ }
+
+ return true;
+}
+
+bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value **params;
+ ir_instr *callinstr;
+ size_t i;
+
+ ir_value *funval = NULL;
+
+ /* return values are never lvalues */
+ if (lvalue) {
+ compile_error(ast_ctx(self), "not an l-value (function call)");
+ return false;
+ }
+
+ if (self->expression.outr) {
+ *out = self->expression.outr;
+ return true;
+ }
+
+ cgen = self->func->codegen;
+ if (!(*cgen)((ast_expression*)(self->func), func, false, &funval))
+ return false;
+ if (!funval)
+ return false;
+
+ params = NULL;
+
+ /* parameters */
+ for (i = 0; i < vec_size(self->params); ++i)
+ {
+ ir_value *param;
+ ast_expression *expr = self->params[i];
+
+ cgen = expr->codegen;
+ if (!(*cgen)(expr, func, false, ¶m))
+ goto error;
+ if (!param)
+ goto error;
+ vec_push(params, param);
+ }
+
+ /* varargs counter */
+ if (self->va_count) {
+ ir_value *va_count;
+ ir_builder *builder = func->curblock->owner->owner;
+ cgen = self->va_count->codegen;
+ if (!(*cgen)((ast_expression*)(self->va_count), func, false, &va_count))
+ return false;
+ if (!ir_block_create_store_op(func->curblock, ast_ctx(self), INSTR_STORE_F,
+ ir_builder_get_va_count(builder), va_count))
+ {
+ return false;
+ }
+ }
+
+ callinstr = ir_block_create_call(func->curblock, ast_ctx(self),
+ ast_function_label(func, "call"),
+ funval, !!(self->func->flags & AST_FLAG_NORETURN));
+ if (!callinstr)
+ goto error;
+
+ for (i = 0; i < vec_size(params); ++i) {
+ ir_call_param(callinstr, params[i]);
+ }
+
+ *out = ir_call_value(callinstr);
+ self->expression.outr = *out;
+
+ codegen_output_type(self, *out);
+
+ vec_free(params);
+ return true;
+error:
+ vec_free(params);
+ return false;
+}
projects / voretournament / voretournament.git / blobdiff