X-Git-Url: https://git.xonotic.org/?a=blobdiff_plain;f=ast.c;h=944fee9b613dec7ba830c4a5e3d5d05397e5a540;hb=e417eb2b333aa8c1d6c981115a557c348f6376ca;hp=af64e0847730f4d71111d0fe4223d9fb5aa17ecf;hpb=7a48377442b6363ee83b7b63314a95e2cbd5a491;p=xonotic%2Fgmqcc.git

diff --git a/ast.c b/ast.c
index af64e08..944fee9 100644
--- a/ast.c
+++ b/ast.c
@@ -36,7 +36,7 @@
     ( (ast_node*)self )->node.destroy = (ast_node_delete*)destroyfn
 
 /* It must not be possible to get here. */
-static void _ast_node_destroy(ast_node *self)
+static GMQCC_NORETURN void _ast_node_destroy(ast_node *self)
 {
     fprintf(stderr, "ast node missing destroy()\n");
     abort();
@@ -55,6 +55,84 @@ static void ast_expression_init(ast_expression *self,
                                 ast_expression_codegen *codegen)
 {
     self->expression.codegen = codegen;
+    self->expression.vtype   = TYPE_VOID;
+    self->expression.next    = NULL;
+    MEM_VECTOR_INIT(&self->expression, params);
+}
+
+static void ast_expression_delete(ast_expression *self)
+{
+    size_t i;
+    if (self->expression.next)
+        ast_delete(self->expression.next);
+    for (i = 0; i < self->expression.params_count; ++i) {
+        ast_delete(self->expression.params[i]);
+    }
+    MEM_VECTOR_CLEAR(&self->expression, params);
+}
+
+static void ast_expression_delete_full(ast_expression *self)
+{
+    ast_expression_delete(self);
+    mem_d(self);
+}
+
+MEM_VEC_FUNCTIONS(ast_expression_common, ast_value*, params)
+
+static ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex);
+static ast_value* ast_value_copy(const ast_value *self)
+{
+    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);
+        if (!cp->expression.next) {
+            ast_value_delete(cp);
+            return NULL;
+        }
+    }
+    return cp;
+}
+
+static ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
+{
+    size_t i;
+    const ast_expression_common *fromex;
+    ast_expression_common *selfex;
+
+    if (!ex)
+        return NULL;
+    else
+    {
+        ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
+
+        fromex   = &ex->expression;
+        selfex = &self->expression;
+
+        /* This may never be codegen()d */
+        selfex->codegen = NULL;
+
+        selfex->vtype = fromex->vtype;
+        if (fromex->next)
+        {
+            selfex->next = ast_type_copy(ctx, fromex->next);
+            if (!selfex->next) {
+                ast_expression_delete_full(self);
+                return NULL;
+            }
+        }
+        else
+            selfex->next = NULL;
+
+        for (i = 0; i < fromex->params_count; ++i) {
+            ast_value *v = ast_value_copy(fromex->params[i]);
+            if (!v || !ast_expression_common_params_add(selfex, v)) {
+                ast_expression_delete_full(self);
+                return NULL;
+            }
+        }
+
+        return self;
+    }
 }
 
 ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
@@ -65,9 +143,8 @@ ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
     self->expression.node.keep = true; /* keep */
 
     self->name = name ? util_strdup(name) : NULL;
-    self->vtype = t;
-    self->next = NULL;
-    MEM_VECTOR_INIT(self, params);
+    self->expression.vtype = t;
+    self->expression.next  = NULL;
     self->isconst = false;
     memset(&self->constval, 0, sizeof(self->constval));
 
@@ -75,20 +152,13 @@ ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
 
     return self;
 }
-MEM_VEC_FUNCTIONS(ast_value, ast_value*, params)
 
 void ast_value_delete(ast_value* self)
 {
-    size_t i;
     if (self->name)
         mem_d((void*)self->name);
-    for (i = 0; i < self->params_count; ++i)
-        ast_value_delete(self->params[i]); /* delete, the ast_function is expected to die first */
-    MEM_VECTOR_CLEAR(self, params);
-    if (self->next) /* delete, not unref, types are always copied */
-        ast_delete(self->next);
     if (self->isconst) {
-        switch (self->vtype)
+        switch (self->expression.vtype)
         {
         case TYPE_STRING:
             mem_d((void*)self->constval.vstring);
@@ -104,9 +174,15 @@ void ast_value_delete(ast_value* self)
             break;
         }
     }
+    ast_expression_delete((ast_expression*)self);
     mem_d(self);
 }
 
+bool GMQCC_WARN ast_value_params_add(ast_value *self, ast_value *p)
+{
+    return ast_expression_common_params_add(&self->expression, p);
+}
+
 bool ast_value_set_name(ast_value *self, const char *name)
 {
     if (self->name)
@@ -125,6 +201,18 @@ ast_binary* ast_binary_new(lex_ctx ctx, int op,
     self->left = left;
     self->right = right;
 
+    if (op >= INSTR_EQ_F && op <= INSTR_GT)
+        self->expression.vtype = TYPE_FLOAT;
+    else if (op == INSTR_AND || op == INSTR_OR ||
+             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->expression.vtype;
+
     return self;
 }
 
@@ -132,14 +220,69 @@ void ast_binary_delete(ast_binary *self)
 {
     ast_unref(self->left);
     ast_unref(self->right);
+    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;
+
+    return self;
+}
+
+void ast_unary_delete(ast_unary *self)
+{
+    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;
+
+    return self;
+}
+
+void ast_return_delete(ast_return *self)
+{
+    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)
 {
+    const ast_expression *outtype;
+
     ast_instantiate(ast_entfield, ctx, ast_entfield_delete);
+
+    if (field->expression.vtype != TYPE_FIELD) {
+        mem_d(self);
+        return NULL;
+    }
+
+    outtype = field->expression.next;
+    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->expression.vtype = outtype->expression.vtype;
+    self->expression.next  = ast_type_copy(ctx, outtype->expression.next);
+
     self->entity = entity;
     self->field  = field;
 
@@ -150,6 +293,7 @@ void ast_entfield_delete(ast_entfield *self)
 {
     ast_unref(self->entity);
     ast_unref(self->field);
+    ast_expression_delete((ast_expression*)self);
     mem_d(self);
 }
 
@@ -173,8 +317,11 @@ ast_ifthen* ast_ifthen_new(lex_ctx ctx, ast_expression *cond, ast_expression *on
 void ast_ifthen_delete(ast_ifthen *self)
 {
     ast_unref(self->cond);
-    ast_unref(self->on_true);
-    ast_unref(self->on_false);
+    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);
 }
 
@@ -201,6 +348,70 @@ void ast_ternary_delete(ast_ternary *self)
     ast_unref(self->cond);
     ast_unref(self->on_true);
     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,
+                       ast_expression *postcond,
+                       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;
+
+    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_call* ast_call_new(lex_ctx ctx,
+                       ast_expression *funcexpr)
+{
+    ast_instantiate(ast_call, ctx, ast_call_delete);
+    ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_call_codegen);
+
+    MEM_VECTOR_INIT(self, params);
+
+    self->func = funcexpr;
+
+    return self;
+}
+MEM_VEC_FUNCTIONS(ast_call, ast_expression*, params)
+
+void ast_call_delete(ast_call *self)
+{
+    size_t i;
+    for (i = 0; i < self->params_count; ++i)
+        ast_unref(self->params[i]);
+    MEM_VECTOR_CLEAR(self, params);
+
+    if (self->func)
+        ast_unref(self->func);
+
+    ast_expression_delete((ast_expression*)self);
     mem_d(self);
 }
 
@@ -221,6 +432,7 @@ void ast_store_delete(ast_store *self)
 {
     ast_unref(self->dest);
     ast_unref(self->source);
+    ast_expression_delete((ast_expression*)self);
     mem_d(self);
 }
 
@@ -247,16 +459,30 @@ void ast_block_delete(ast_block *self)
     for (i = 0; i < self->locals_count; ++i)
         ast_delete(self->locals[i]);
     MEM_VECTOR_CLEAR(self, locals);
+    ast_expression_delete((ast_expression*)self);
     mem_d(self);
 }
 
+bool ast_block_set_type(ast_block *self, ast_expression *from)
+{
+    if (self->expression.next)
+        ast_delete(self->expression.next);
+    self->expression.vtype = from->expression.vtype;
+    if (from->expression.next) {
+        self->expression.next = ast_type_copy(self->expression.node.context, from->expression.next);
+        if (!self->expression.next)
+            return false;
+    }
+    return true;
+}
+
 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->isconst ||
-        vtype->vtype != TYPE_FUNCTION)
+        vtype->expression.vtype != TYPE_FUNCTION)
     {
         mem_d(self);
         return NULL;
@@ -266,7 +492,14 @@ ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
     self->name = name ? util_strdup(name) : NULL;
     MEM_VECTOR_INIT(self, blocks);
 
+    self->labelcount = 0;
+    self->builtin = 0;
+
     self->ir_func = NULL;
+    self->curblock = NULL;
+
+    self->breakblock    = NULL;
+    self->continueblock = NULL;
 
     vtype->isconst = true;
     vtype->constval.vfunc = self;
@@ -296,8 +529,44 @@ void ast_function_delete(ast_function *self)
     mem_d(self);
 }
 
+static void ast_util_hexitoa(char *buf, size_t size, unsigned int num)
+{
+    unsigned int base = 10;
+#define checknul() do { if (size == 1) { *buf = 0; return; } } while (0)
+#define addch(x) do { *buf++ = (x); --size; checknul(); } while (0)
+    if (size < 1)
+        return;
+    checknul();
+    if (!num)
+        addch('0');
+    else {
+        while (num)
+        {
+            int digit = num % base;
+            num /= base;
+            addch('0' + digit);
+        }
+    }
+
+    *buf = 0;
+#undef addch
+#undef checknul
+}
+
+const char* ast_function_label(ast_function *self, const char *prefix)
+{
+    size_t id = (self->labelcount++);
+    size_t len = strlen(prefix);
+    strncpy(self->labelbuf, prefix, sizeof(self->labelbuf));
+    ast_util_hexitoa(self->labelbuf + len, sizeof(self->labelbuf)-len, id);
+    return self->labelbuf;
+}
+
 /*********************************************************************/
-/* AST codegen aprt
+/* 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.
  */
 
 bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_value **out)
@@ -309,8 +578,10 @@ bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_valu
      * and the ast-user should take care of ast_global_codegen to be used
      * on all the globals.
      */
-    if (!self->ir_v)
+    if (!self->ir_v) {
+        printf("ast_value used before generated (%s)\n", self->name);
         return false;
+    }
     *out = self->ir_v;
     return true;
 }
@@ -318,23 +589,26 @@ bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_valu
 bool ast_global_codegen(ast_value *self, ir_builder *ir)
 {
     ir_value *v = NULL;
-    if (self->isconst && self->vtype == TYPE_FUNCTION)
+    if (self->isconst && self->expression.vtype == TYPE_FUNCTION)
     {
-        ir_function *func = ir_builder_create_function(ir, self->name);
+        ir_function *func = ir_builder_create_function(ir, self->name, self->expression.next->expression.vtype);
         if (!func)
             return false;
 
         self->constval.vfunc->ir_func = func;
+        self->ir_v = func->value;
         /* The function is filled later on ast_function_codegen... */
         return true;
     }
 
-    v = ir_builder_create_global(ir, self->name, self->vtype);
-    if (!v)
+    v = ir_builder_create_global(ir, self->name, self->expression.vtype);
+    if (!v) {
+        printf("ir_builder_create_global failed\n");
         return false;
+    }
 
     if (self->isconst) {
-        switch (self->vtype)
+        switch (self->expression.vtype)
         {
             case TYPE_FLOAT:
                 if (!ir_value_set_float(v, self->constval.vfloat))
@@ -349,12 +623,61 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir)
                     goto error;
                 break;
             case TYPE_FUNCTION:
+                printf("global of type function not properly generated\n");
+                goto error;
                 /* Cannot generate an IR value for a function,
                  * need a pointer pointing to a function rather.
                  */
-                goto error;
             default:
-                printf("TODO: global constant type %i\n", self->vtype);
+                printf("TODO: global constant type %i\n", self->expression.vtype);
+                break;
+        }
+    }
+
+    /* link us to the ir_value */
+    self->ir_v = v;
+    return true;
+
+error: /* clean up */
+    ir_value_delete(v);
+    return false;
+}
+
+bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
+{
+    ir_value *v = NULL;
+    if (self->isconst && self->expression.vtype == TYPE_FUNCTION)
+    {
+        /* Do we allow local functions? I think not...
+         * this is NOT a function pointer atm.
+         */
+        return false;
+    }
+
+    v = ir_function_create_local(func, self->name, self->expression.vtype, param);
+    if (!v)
+        return false;
+
+    /* A constant local... hmmm...
+     * I suppose the IR will have to deal with this
+     */
+    if (self->isconst) {
+        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:
+                printf("TODO: global constant type %i\n", self->expression.vtype);
                 break;
         }
     }
@@ -370,42 +693,333 @@ error: /* clean up */
 
 bool ast_function_codegen(ast_function *self, ir_builder *ir)
 {
-    if (!self->ir_func) {
+    ir_function *irf;
+    ir_value    *dummy;
+    ast_expression_common *ec;
+    size_t    i;
+
+    irf = self->ir_func;
+    if (!irf) {
         printf("ast_function's related ast_value was not generated yet\n");
         return false;
     }
-    return false;
+
+    /* fill the parameter list */
+    ec = &self->vtype->expression;
+    for (i = 0; i < ec->params_count; ++i)
+    {
+        if (!ir_function_params_add(irf, ec->params[i]->expression.vtype))
+            return false;
+        if (!self->builtin) {
+            if (!ast_local_codegen(ec->params[i], self->ir_func, true))
+                return false;
+        }
+    }
+
+    if (self->builtin) {
+        irf->builtin = self->builtin;
+        return true;
+    }
+
+    self->curblock = ir_function_create_block(irf, "entry");
+    if (!self->curblock)
+        return false;
+
+    for (i = 0; i < self->blocks_count; ++i) {
+        ast_expression_codegen *gen = self->blocks[i]->expression.codegen;
+        if (!(*gen)((ast_expression*)self->blocks[i], self, false, &dummy))
+            return false;
+    }
+
+    /* TODO: check return types */
+    if (!self->curblock->is_return)
+    {
+        if (!self->vtype->expression.next ||
+            self->vtype->expression.next->expression.vtype == TYPE_VOID)
+        {
+            return ir_block_create_return(self->curblock, NULL);
+        }
+        else
+        {
+            /* error("missing return"); */
+            return false;
+        }
+    }
+    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)
 {
-    return false;
+    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...
+     */
+    (void)lvalue;
+
+    /* 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 < self->locals_count; ++i)
+    {
+        if (!ast_local_codegen(self->locals[i], func->ir_func, false))
+            return false;
+    }
+
+    for (i = 0; i < self->exprs_count; ++i)
+    {
+        ast_expression_codegen *gen = self->exprs[i]->expression.codegen;
+        if (!(*gen)(self->exprs[i], func, false, out))
+            return false;
+    }
+
+    return true;
 }
 
 bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_value **out)
 {
-    /* NOTE: remember: destination codegen needs to have lvalue=true */
-    return false;
+    ast_expression_codegen *cgen;
+    ir_value *left, *right;
+
+    cgen = self->dest->expression.codegen;
+    /* lvalue! */
+    if (!(*cgen)((ast_expression*)(self->dest), func, true, &left))
+        return false;
+
+    cgen = self->source->expression.codegen;
+    /* rvalue! */
+    if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
+        return false;
+
+    if (!ir_block_create_store_op(func->curblock, self->op, left, right))
+        return false;
+
+    /* 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)
 {
-    return false;
+    ast_expression_codegen *cgen;
+    ir_value *left, *right;
+
+    /* In the context of a binary operation, we can disregard
+     * the lvalue flag.
+     */
+     (void)lvalue;
+
+    cgen = self->left->expression.codegen;
+    /* lvalue! */
+    if (!(*cgen)((ast_expression*)(self->left), func, false, &left))
+        return false;
+
+    cgen = self->right->expression.codegen;
+    /* rvalue! */
+    if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
+        return false;
+
+    *out = ir_block_create_binop(func->curblock, ast_function_label(func, "bin"),
+                                 self->op, left, right);
+    if (!*out)
+        return false;
+
+    return true;
+}
+
+bool ast_unary_codegen(ast_unary *self, ast_function *func, bool lvalue, ir_value **out)
+{
+    ast_expression_codegen *cgen;
+    ir_value *operand;
+
+    /* In the context of a unary operation, we can disregard
+     * the lvalue flag.
+     */
+    (void)lvalue;
+
+    cgen = self->operand->expression.codegen;
+    /* lvalue! */
+    if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
+        return false;
+
+    *out = ir_block_create_unary(func->curblock, ast_function_label(func, "unary"),
+                                 self->op, operand);
+    if (!*out)
+        return false;
+
+    return true;
+}
+
+bool ast_return_codegen(ast_return *self, ast_function *func, bool lvalue, ir_value **out)
+{
+    ast_expression_codegen *cgen;
+    ir_value *operand;
+
+    /* In the context of a return operation, we can disregard
+     * the lvalue flag.
+     */
+    (void)lvalue;
+
+    cgen = self->operand->expression.codegen;
+    /* lvalue! */
+    if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
+        return false;
+
+    if (!ir_block_create_return(func->curblock, operand))
+        return false;
+
+    return true;
 }
 
 bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, ir_value **out)
 {
-    return false;
+    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.
+     */
+
+    cgen = self->entity->expression.codegen;
+    if (!(*cgen)((ast_expression*)(self->entity), func, false, &ent))
+        return false;
+
+    cgen = self->field->expression.codegen;
+    if (!(*cgen)((ast_expression*)(self->field), func, false, &field))
+        return false;
+
+    if (lvalue) {
+        /* address! */
+        *out = ir_block_create_fieldaddress(func->curblock, ast_function_label(func, "efa"),
+                                            ent, field);
+    } else {
+        *out = ir_block_create_load_from_ent(func->curblock, ast_function_label(func, "efv"),
+                                             ent, field, self->expression.vtype);
+    }
+    if (!*out)
+        return false;
+
+    /* Hm that should be it... */
+    return true;
 }
 
 bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_value **out)
 {
-    if (out) *out = NULL;
-    return false;
+    ast_expression_codegen *cgen;
+
+    ir_value *condval;
+    ir_value *dummy;
+
+    ir_block *cond = func->curblock;
+    ir_block *ontrue;
+    ir_block *onfalse;
+    ir_block *merge;
+
+    /* We don't output any value, thus also don't care about r/lvalue */
+    (void)out;
+    (void)lvalue;
+
+    /* generate the condition */
+    func->curblock = cond;
+    cgen = self->cond->expression.codegen;
+    if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
+        return false;
+
+    /* on-true path */
+
+    if (self->on_true) {
+        /* create on-true block */
+        ontrue = ir_function_create_block(func->ir_func, ast_function_label(func, "ontrue"));
+        if (!ontrue)
+            return false;
+
+        /* enter the block */
+        func->curblock = ontrue;
+
+        /* generate */
+        cgen = self->on_true->expression.codegen;
+        if (!(*cgen)((ast_expression*)(self->on_true), func, false, &dummy))
+            return false;
+    } else
+        ontrue = NULL;
+
+    /* on-false path */
+    if (self->on_false) {
+        /* create on-false block */
+        onfalse = ir_function_create_block(func->ir_func, ast_function_label(func, "onfalse"));
+        if (!onfalse)
+            return false;
+
+        /* enter the block */
+        func->curblock = onfalse;
+
+        /* generate */
+        cgen = self->on_false->expression.codegen;
+        if (!(*cgen)((ast_expression*)(self->on_false), func, false, &dummy))
+            return false;
+    } else
+        onfalse = NULL;
+
+    /* Merge block were they all merge in to */
+    merge = ir_function_create_block(func->ir_func, ast_function_label(func, "endif"));
+    if (!merge)
+        return false;
+
+    /* add jumps ot the merge block */
+    if (ontrue && !ir_block_create_jump(ontrue, merge))
+        return false;
+    if (onfalse && !ir_block_create_jump(onfalse, merge))
+        return false;
+
+    /* we create the if here, that way all blocks are ordered :)
+     */
+    if (!ir_block_create_if(cond, condval,
+                            (ontrue  ? ontrue  : merge),
+                            (onfalse ? onfalse : merge)))
+    {
+        return false;
+    }
+
+    /* Now enter the merge block */
+    func->curblock = merge;
+
+    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 *ontrue;
+    ir_block *onfalse;
+    ir_block *merge;
+
     /* 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
@@ -415,5 +1029,366 @@ bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_
         *out = self->phi_out;
         return true;
     }
+
+    /* Ternary can never create an lvalue... */
+    if (lvalue)
+        return false;
+
+    /* In the following, contraty to ast_ifthen, we assume both paths exist. */
+
+    /* generate the condition */
+    func->curblock = cond;
+    cgen = self->cond->expression.codegen;
+    if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
+        return false;
+
+    /* create on-true block */
+    ontrue = ir_function_create_block(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->expression.codegen;
+        if (!(*cgen)((ast_expression*)(self->on_true), func, false, &trueval))
+            return false;
+    }
+
+    /* create on-false block */
+    onfalse = ir_function_create_block(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->expression.codegen;
+        if (!(*cgen)((ast_expression*)(self->on_false), func, false, &falseval))
+            return false;
+    }
+
+    /* create merge block */
+    merge = ir_function_create_block(func->ir_func, ast_function_label(func, "tern_out"));
+    if (!merge)
+        return false;
+    /* jump to merge block */
+    if (!ir_block_create_jump(ontrue, merge))
+        return false;
+    if (!ir_block_create_jump(onfalse, merge))
+        return false;
+
+    /* create if instruction */
+    if (!ir_block_create_if(cond, 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) {
+        /* error("ternary with different types on the two sides"); */
+        return false;
+    }
+
+    /* create PHI */
+    phi = ir_block_create_phi(merge, ast_function_label(func, "phi"), trueval->vtype);
+    if (!phi ||
+        !ir_phi_add(phi, ontrue,  trueval) ||
+        !ir_phi_add(phi, onfalse, falseval))
+    {
+        return false;
+    }
+
+    self->phi_out = ir_phi_value(phi);
+    *out = self->phi_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 *old_bcontinue = NULL;
+    ir_block *old_bbreak    = NULL;
+
+    ir_block *tmpblock      = NULL;
+
+    (void)lvalue;
+    (void)out;
+
+    /* 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->expression.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(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->expression.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(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(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 = func->ir_func->blocks_count;
+    bout = ir_function_create_block(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(func->ir_func, ast_function_label(func, "loop_body"));
+        if (!bbody)
+            return false;
+
+        /* enter */
+        func->curblock = bbody;
+
+        old_bbreak          = func->breakblock;
+        old_bcontinue       = func->continueblock;
+        func->breakblock    = bbreak;
+        func->continueblock = bcontinue;
+
+        /* generate */
+        cgen = self->body->expression.codegen;
+        if (!(*cgen)((ast_expression*)(self->body), func, false, &dummy))
+            return false;
+
+        end_bbody = func->curblock;
+        func->breakblock    = old_bbreak;
+        func->continueblock = old_bcontinue;
+    }
+
+    /* post-loop-condition */
+    if (self->postcond)
+    {
+        /* enter */
+        func->curblock = bpostcond;
+
+        /* generate */
+        cgen = self->postcond->expression.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->expression.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, 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 (!ir_block_create_if(end_bprecond, 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 = bout;
+        if (!ir_block_create_jump(end_bbody, 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, 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 (!ir_block_create_if(end_bpostcond, postcond, ontrue, onfalse))
+            return false;
+    }
+
+    /* Move 'bout' to the end */
+    if (!ir_function_blocks_remove(func->ir_func, bout_id) ||
+        !ir_function_blocks_add(func->ir_func, bout))
+    {
+        ir_block_delete(bout);
+        return false;
+    }
+
+    return true;
+}
+
+bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value **out)
+{
+    ast_expression_codegen *cgen;
+    ir_value_vector         params;
+    ir_instr               *callinstr;
+    size_t i;
+
+    ir_value *funval = NULL;
+
+    /* return values are never rvalues */
+    (void)lvalue;
+
+    cgen = self->func->expression.codegen;
+    if (!(*cgen)((ast_expression*)(self->func), func, false, &funval))
+        return false;
+    if (!funval)
+        return false;
+
+    MEM_VECTOR_INIT(&params, v);
+
+    /* parameters */
+    for (i = 0; i < self->params_count; ++i)
+    {
+        ir_value *param;
+        ast_expression *expr = self->params[i];
+
+        cgen = expr->expression.codegen;
+        if (!(*cgen)(expr, func, false, &param))
+            goto error;
+        if (!param)
+            goto error;
+        if (!ir_value_vector_v_add(&params, param))
+            goto error;
+    }
+
+    callinstr = ir_block_create_call(func->curblock, ast_function_label(func, "call"), funval);
+    if (!callinstr)
+        goto error;
+
+    for (i = 0; i < params.v_count; ++i) {
+        if (!ir_call_param(callinstr, params.v[i]))
+            goto error;
+    }
+
+    *out = ir_call_value(callinstr);
+
+    MEM_VECTOR_CLEAR(&params, v);
+    return true;
+error:
+    MEM_VECTOR_CLEAR(&params, v);
     return false;
 }