X-Git-Url: https://git.xonotic.org/?p=xonotic%2Fgmqcc.git;a=blobdiff_plain;f=ast.c;h=bcc2f8ef3f4bc4fb3887facfa047a6c6c6fef712;hp=5c7d6931323cf702f679016b8fae27b94e72e8bf;hb=24fc2e5146d7ebb213b2690ed99c8eb61cafd81e;hpb=755ee5462fb3d59b181da79d7c7f7eeba32bda2c

diff --git a/ast.c b/ast.c
index 5c7d693..bcc2f8e 100644
--- a/ast.c
+++ b/ast.c
@@ -1,6 +1,7 @@
 /*
- * Copyright (C) 2012
+ * 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
@@ -20,12 +21,12 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "gmqcc.h"
 #include "ast.h"
+#include "parser.h"
 
 #define ast_instantiate(T, ctx, destroyfn)                          \
     T* self = (T*)mem_a(sizeof(T));                                 \
@@ -33,25 +34,64 @@
         return NULL;                                                \
     }                                                               \
     ast_node_init((ast_node*)self, ctx, TYPE_##T);                  \
-    ( (ast_node*)self )->node.destroy = (ast_node_delete*)destroyfn
+    ( (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_argpipe_delete(ast_argpipe*);
+static bool ast_argpipe_codegen(ast_argpipe*, 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");
-    abort();
+    exit(EXIT_FAILURE);
 }
 
 /* Initialize main ast node aprts */
-static void ast_node_init(ast_node *self, lex_ctx ctx, int nodetype)
+static void ast_node_init(ast_node *self, lex_ctx_t ctx, int nodetype)
 {
-    self->node.context = ctx;
-    self->node.destroy = &_ast_node_destroy;
-    self->node.keep    = false;
-    self->node.nodetype = nodetype;
-    self->node.side_effects = false;
+    self->context = ctx;
+    self->destroy = &_ast_node_destroy;
+    self->keep    = false;
+    self->nodetype = nodetype;
+    self->side_effects = false;
 }
 
 /* weight and side effects */
@@ -66,25 +106,28 @@ static void _ast_propagate_effects(ast_node *self, ast_node *other)
 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;
-    self->expression.outl     = NULL;
-    self->expression.outr     = NULL;
-    self->expression.params   = NULL;
-    self->expression.count    = 0;
-    self->expression.flags    = 0;
+    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->expression.next)
-        ast_delete(self->expression.next);
-    for (i = 0; i < vec_size(self->expression.params); ++i) {
-        ast_delete(self->expression.params[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->expression.params);
+    vec_free(self->params);
+    if (self->varparam)
+        ast_delete(self->varparam);
 }
 
 static void ast_expression_delete_full(ast_expression *self)
@@ -96,15 +139,11 @@ static void ast_expression_delete_full(ast_expression *self)
 ast_value* ast_value_copy(const ast_value *self)
 {
     size_t i;
-    const ast_expression_common *fromex;
-    ast_expression_common *selfex;
+    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);
-        if (!cp->expression.next) {
-            ast_value_delete(cp);
-            return NULL;
-        }
     }
     fromex   = &self->expression;
     selfex = &cp->expression;
@@ -112,54 +151,45 @@ ast_value* ast_value_copy(const ast_value *self)
     selfex->flags    = fromex->flags;
     for (i = 0; i < vec_size(fromex->params); ++i) {
         ast_value *v = ast_value_copy(fromex->params[i]);
-        if (!v) {
-            ast_value_delete(cp);
-            return NULL;
-        }
         vec_push(selfex->params, v);
     }
     return cp;
 }
 
-bool ast_type_adopt_impl(ast_expression *self, const ast_expression *other)
+void ast_type_adopt_impl(ast_expression *self, const ast_expression *other)
 {
     size_t i;
-    const ast_expression_common *fromex;
-    ast_expression_common *selfex;
-    self->expression.vtype = other->expression.vtype;
-    if (other->expression.next) {
-        self->expression.next = (ast_expression*)ast_type_copy(ast_ctx(self), other->expression.next);
-        if (!self->expression.next)
-            return false;
-    }
-    fromex   = &other->expression;
-    selfex = &self->expression;
+    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]);
-        if (!v)
-            return false;
         vec_push(selfex->params, v);
     }
-    return true;
 }
 
-static ast_expression* ast_shallow_type(lex_ctx ctx, int vtype)
+static ast_expression* ast_shallow_type(lex_ctx_t ctx, int vtype)
 {
     ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
     ast_expression_init(self, NULL);
-    self->expression.codegen = NULL;
-    self->expression.next    = NULL;
-    self->expression.vtype   = vtype;
+    self->codegen = NULL;
+    self->next    = NULL;
+    self->vtype   = vtype;
     return self;
 }
 
-ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
+ast_expression* ast_type_copy(lex_ctx_t ctx, const ast_expression *ex)
 {
     size_t i;
-    const ast_expression_common *fromex;
-    ast_expression_common *selfex;
+    const ast_expression *fromex;
+    ast_expression       *selfex;
 
     if (!ex)
         return NULL;
@@ -168,21 +198,15 @@ ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
         ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
         ast_expression_init(self, NULL);
 
-        fromex   = &ex->expression;
-        selfex = &self->expression;
+        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);
-            if (!selfex->next) {
-                ast_expression_delete_full(self);
-                return NULL;
-            }
-        }
         else
             selfex->next = NULL;
 
@@ -190,10 +214,6 @@ ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
         selfex->flags    = fromex->flags;
         for (i = 0; i < vec_size(fromex->params); ++i) {
             ast_value *v = ast_value_copy(fromex->params[i]);
-            if (!v) {
-                ast_expression_delete_full(self);
-                return NULL;
-            }
             vec_push(selfex->params, v);
         }
 
@@ -203,27 +223,30 @@ ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
 
 bool ast_compare_type(ast_expression *a, ast_expression *b)
 {
-    if (a->expression.vtype != b->expression.vtype)
+    if (a->vtype == TYPE_NIL ||
+        b->vtype == TYPE_NIL)
+        return true;
+    if (a->vtype != b->vtype)
         return false;
-    if (!a->expression.next != !b->expression.next)
+    if (!a->next != !b->next)
         return false;
-    if (vec_size(a->expression.params) != vec_size(b->expression.params))
+    if (vec_size(a->params) != vec_size(b->params))
         return false;
-    if ((a->expression.flags & AST_FLAG_TYPE_MASK) !=
-        (b->expression.flags & AST_FLAG_TYPE_MASK) )
+    if ((a->flags & AST_FLAG_TYPE_MASK) !=
+        (b->flags & AST_FLAG_TYPE_MASK) )
     {
         return false;
     }
-    if (vec_size(a->expression.params)) {
+    if (vec_size(a->params)) {
         size_t i;
-        for (i = 0; i < vec_size(a->expression.params); ++i) {
-            if (!ast_compare_type((ast_expression*)a->expression.params[i],
-                                  (ast_expression*)b->expression.params[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->expression.next)
-        return ast_compare_type(a->expression.next, b->expression.next);
+    if (a->next)
+        return ast_compare_type(a->next, b->next);
     return true;
 }
 
@@ -236,50 +259,50 @@ static size_t ast_type_to_string_impl(ast_expression *e, char *buf, size_t bufsi
     if (!e) {
         if (pos + 6 >= bufsize)
             goto full;
-        strcpy(buf + pos, "(null)");
+        util_strncpy(buf + pos, "(null)", 6);
         return pos + 6;
     }
 
     if (pos + 1 >= bufsize)
         goto full;
 
-    switch (e->expression.vtype) {
+    switch (e->vtype) {
         case TYPE_VARIANT:
-            strcpy(buf + pos, "(variant)");
+            util_strncpy(buf + pos, "(variant)", 9);
             return pos + 9;
 
         case TYPE_FIELD:
             buf[pos++] = '.';
-            return ast_type_to_string_impl(e->expression.next, buf, bufsize, 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->expression.next, buf, bufsize, 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->expression.next, buf, bufsize, pos);
+            pos = ast_type_to_string_impl(e->next, buf, bufsize, pos);
             if (pos + 2 >= bufsize)
                 goto full;
-            if (!vec_size(e->expression.params)) {
+            if (!vec_size(e->params)) {
                 buf[pos++] = '(';
                 buf[pos++] = ')';
                 return pos;
             }
             buf[pos++] = '(';
-            pos = ast_type_to_string_impl((ast_expression*)(e->expression.params[0]), buf, bufsize, pos);
-            for (i = 1; i < vec_size(e->expression.params); ++i) {
+            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->expression.params[i]), buf, bufsize, pos);
+                pos = ast_type_to_string_impl((ast_expression*)(e->params[i]), buf, bufsize, pos);
             }
             if (pos + 1 >= bufsize)
                 goto full;
@@ -287,22 +310,22 @@ static size_t ast_type_to_string_impl(ast_expression *e, char *buf, size_t bufsi
             return pos;
 
         case TYPE_ARRAY:
-            pos = ast_type_to_string_impl(e->expression.next, buf, bufsize, pos);
+            pos = ast_type_to_string_impl(e->next, buf, bufsize, pos);
             if (pos + 1 >= bufsize)
                 goto full;
             buf[pos++] = '[';
-            pos += snprintf(buf + pos, bufsize - pos - 1, "%i", (int)e->expression.count);
+            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->expression.vtype];
+            typestr = type_name[e->vtype];
             typelen = strlen(typestr);
             if (pos + typelen >= bufsize)
                 goto full;
-            strcpy(buf + pos, typestr);
+            util_strncpy(buf + pos, typestr, typelen);
             return pos + typelen;
     }
 
@@ -319,7 +342,8 @@ void ast_type_to_string(ast_expression *e, char *buf, size_t bufsize)
     buf[pos] = 0;
 }
 
-ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
+static bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_value **out);
+ast_value* ast_value_new(lex_ctx_t ctx, const char *name, int t)
 {
     ast_instantiate(ast_value, ctx, ast_value_delete);
     ast_expression_init((ast_expression*)self,
@@ -332,8 +356,10 @@ ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
     self->isfield  = false;
     self->cvq      = CV_NONE;
     self->hasvalue = false;
-    self->uses    = 0;
+    self->isimm    = false;
+    self->uses     = 0;
     memset(&self->constval, 0, sizeof(self->constval));
+    self->initlist = NULL;
 
     self->ir_v           = NULL;
     self->ir_values      = NULL;
@@ -341,6 +367,9 @@ ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
 
     self->setter = NULL;
     self->getter = NULL;
+    self->desc   = NULL;
+
+    self->argcounter  = NULL;
 
     return self;
 }
@@ -349,6 +378,8 @@ 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)
         {
@@ -368,6 +399,24 @@ void ast_value_delete(ast_value* self)
     }
     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);
 }
@@ -385,7 +434,7 @@ bool ast_value_set_name(ast_value *self, const char *name)
     return !!self->name;
 }
 
-ast_binary* ast_binary_new(lex_ctx ctx, int op,
+ast_binary* ast_binary_new(lex_ctx_t ctx, int op,
                            ast_expression* left, ast_expression* right)
 {
     ast_instantiate(ast_binary, ctx, ast_binary_delete);
@@ -413,20 +462,24 @@ ast_binary* ast_binary_new(lex_ctx ctx, int op,
     else if (op == INSTR_MUL_V)
         self->expression.vtype = TYPE_FLOAT;
     else
-        self->expression.vtype = left->expression.vtype;
+        self->expression.vtype = left->vtype;
+
+    /* references all */
+    self->refs = AST_REF_ALL;
 
     return self;
 }
 
 void ast_binary_delete(ast_binary *self)
 {
-    ast_unref(self->left);
-    ast_unref(self->right);
+    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_binstore* ast_binstore_new(lex_ctx_t ctx, int storop, int op,
                                ast_expression* left, ast_expression* right)
 {
     ast_instantiate(ast_binstore, ctx, ast_binstore_delete);
@@ -441,11 +494,7 @@ ast_binstore* ast_binstore_new(lex_ctx ctx, int storop, int op,
 
     self->keep_dest = false;
 
-    if (!ast_type_adopt(self, left)) {
-        ast_delete(self);
-        return NULL;
-    }
-
+    ast_type_adopt(self, left);
     return self;
 }
 
@@ -458,7 +507,7 @@ void ast_binstore_delete(ast_binstore *self)
     mem_d(self);
 }
 
-ast_unary* ast_unary_new(lex_ctx ctx, int op,
+ast_unary* ast_unary_new(lex_ctx_t ctx, int op,
                          ast_expression *expr)
 {
     ast_instantiate(ast_unary, ctx, ast_unary_delete);
@@ -472,7 +521,7 @@ ast_unary* ast_unary_new(lex_ctx ctx, int op,
     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);
+        compile_error(ctx, "cannot determine type of unary operation %s", util_instr_str[op]);
 
     return self;
 }
@@ -484,7 +533,7 @@ void ast_unary_delete(ast_unary *self)
     mem_d(self);
 }
 
-ast_return* ast_return_new(lex_ctx ctx, ast_expression *expr)
+ast_return* ast_return_new(lex_ctx_t ctx, ast_expression *expr)
 {
     ast_instantiate(ast_return, ctx, ast_return_delete);
     ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_return_codegen);
@@ -505,16 +554,16 @@ void ast_return_delete(ast_return *self)
     mem_d(self);
 }
 
-ast_entfield* ast_entfield_new(lex_ctx ctx, ast_expression *entity, ast_expression *field)
+ast_entfield* ast_entfield_new(lex_ctx_t ctx, ast_expression *entity, ast_expression *field)
 {
-    if (field->expression.vtype != TYPE_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->expression.next);
+    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_entfield* ast_entfield_new_force(lex_ctx_t ctx, ast_expression *entity, ast_expression *field, const ast_expression *outtype)
 {
     ast_instantiate(ast_entfield, ctx, ast_entfield_delete);
 
@@ -531,11 +580,7 @@ ast_entfield* ast_entfield_new_force(lex_ctx ctx, ast_expression *entity, ast_ex
     ast_propagate_effects(self, entity);
     ast_propagate_effects(self, field);
 
-    if (!ast_type_adopt(self, outtype)) {
-        ast_entfield_delete(self);
-        return NULL;
-    }
-
+    ast_type_adopt(self, outtype);
     return self;
 }
 
@@ -547,7 +592,7 @@ void ast_entfield_delete(ast_entfield *self)
     mem_d(self);
 }
 
-ast_member* ast_member_new(lex_ctx ctx, ast_expression *owner, unsigned int field, const char *name)
+ast_member* ast_member_new(lex_ctx_t ctx, ast_expression *owner, unsigned int field, const char *name)
 {
     ast_instantiate(ast_member, ctx, ast_member_delete);
     if (field >= 3) {
@@ -555,9 +600,9 @@ ast_member* ast_member_new(lex_ctx ctx, ast_expression *owner, unsigned int fiel
         return NULL;
     }
 
-    if (owner->expression.vtype != TYPE_VECTOR &&
-        owner->expression.vtype != TYPE_FIELD) {
-        compile_error(ctx, "member-access on an invalid owner of type %s", type_name[owner->expression.vtype]);
+    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;
     }
@@ -565,7 +610,7 @@ ast_member* ast_member_new(lex_ctx ctx, ast_expression *owner, unsigned int fiel
     ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_member_codegen);
     self->expression.node.keep = true; /* keep */
 
-    if (owner->expression.vtype == TYPE_VECTOR) {
+    if (owner->vtype == TYPE_VECTOR) {
         self->expression.vtype = TYPE_FLOAT;
         self->expression.next  = NULL;
     } else {
@@ -597,6 +642,7 @@ void ast_member_delete(ast_member *self)
      * purpose that is not garbage-collected.
     */
     ast_expression_delete((ast_expression*)self);
+    mem_d(self->name);
     mem_d(self);
 }
 
@@ -608,12 +654,12 @@ bool ast_member_set_name(ast_member *self, const char *name)
     return !!self->name;
 }
 
-ast_array_index* ast_array_index_new(lex_ctx ctx, ast_expression *array, ast_expression *index)
+ast_array_index* ast_array_index_new(lex_ctx_t ctx, ast_expression *array, ast_expression *index)
 {
     ast_expression *outtype;
     ast_instantiate(ast_array_index, ctx, ast_array_index_delete);
 
-    outtype = array->expression.next;
+    outtype = array->next;
     if (!outtype) {
         mem_d(self);
         /* Error: field has no type... */
@@ -627,11 +673,8 @@ ast_array_index* ast_array_index_new(lex_ctx ctx, ast_expression *array, ast_exp
     ast_propagate_effects(self, array);
     ast_propagate_effects(self, index);
 
-    if (!ast_type_adopt(self, outtype)) {
-        ast_array_index_delete(self);
-        return NULL;
-    }
-    if (array->expression.vtype == TYPE_FIELD && outtype->expression.vtype == TYPE_ARRAY) {
+    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);
@@ -646,13 +689,32 @@ ast_array_index* ast_array_index_new(lex_ctx ctx, ast_expression *array, ast_exp
 
 void ast_array_index_delete(ast_array_index *self)
 {
-    ast_unref(self->array);
-    ast_unref(self->index);
+    if (self->array)
+        ast_unref(self->array);
+    if (self->index)
+        ast_unref(self->index);
+    ast_expression_delete((ast_expression*)self);
+    mem_d(self);
+}
+
+ast_argpipe* ast_argpipe_new(lex_ctx_t ctx, ast_expression *index)
+{
+    ast_instantiate(ast_argpipe, ctx, ast_argpipe_delete);
+    ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_argpipe_codegen);
+    self->index = index;
+    self->expression.vtype = TYPE_NOEXPR;
+    return self;
+}
+
+void ast_argpipe_delete(ast_argpipe *self)
+{
+    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_ifthen* ast_ifthen_new(lex_ctx_t ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
 {
     ast_instantiate(ast_ifthen, ctx, ast_ifthen_delete);
     if (!ontrue && !onfalse) {
@@ -685,8 +747,9 @@ void ast_ifthen_delete(ast_ifthen *self)
     mem_d(self);
 }
 
-ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
+ast_ternary* ast_ternary_new(lex_ctx_t 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) {
@@ -702,24 +765,26 @@ ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *
     ast_propagate_effects(self, ontrue);
     ast_propagate_effects(self, onfalse);
 
-    if (!ast_type_adopt(self, ontrue)) {
-        ast_ternary_delete(self);
-        return NULL;
-    }
+    if (ontrue->vtype == TYPE_NIL)
+        exprtype = onfalse;
+    ast_type_adopt(self, exprtype);
 
     return self;
 }
 
 void ast_ternary_delete(ast_ternary *self)
 {
-    ast_unref(self->cond);
-    ast_unref(self->on_true);
-    ast_unref(self->on_false);
+    /* 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_loop* ast_loop_new(lex_ctx_t ctx,
                        ast_expression *initexpr,
                        ast_expression *precond, bool pre_not,
                        ast_expression *postcond, bool post_not,
@@ -768,7 +833,7 @@ void ast_loop_delete(ast_loop *self)
     mem_d(self);
 }
 
-ast_breakcont* ast_breakcont_new(lex_ctx ctx, bool iscont, unsigned int levels)
+ast_breakcont* ast_breakcont_new(lex_ctx_t 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);
@@ -785,7 +850,7 @@ void ast_breakcont_delete(ast_breakcont *self)
     mem_d(self);
 }
 
-ast_switch* ast_switch_new(lex_ctx ctx, ast_expression *op)
+ast_switch* ast_switch_new(lex_ctx_t ctx, ast_expression *op)
 {
     ast_instantiate(ast_switch, ctx, ast_switch_delete);
     ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_switch_codegen);
@@ -814,14 +879,17 @@ void ast_switch_delete(ast_switch *self)
     mem_d(self);
 }
 
-ast_label* ast_label_new(lex_ctx ctx, const char *name)
+ast_label* ast_label_new(lex_ctx_t 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->name    = util_strdup(name);
-    self->irblock = NULL;
-    self->gotos   = NULL;
+    self->expression.vtype = TYPE_NOEXPR;
+
+    self->name      = util_strdup(name);
+    self->irblock   = NULL;
+    self->gotos     = NULL;
+    self->undefined = undefined;
 
     return self;
 }
@@ -834,12 +902,12 @@ void ast_label_delete(ast_label *self)
     mem_d(self);
 }
 
-void ast_label_register_goto(ast_label *self, ast_goto *g)
+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_goto* ast_goto_new(lex_ctx_t ctx, const char *name)
 {
     ast_instantiate(ast_goto, ctx, ast_goto_delete);
     ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_goto_codegen);
@@ -863,18 +931,24 @@ void ast_goto_set_label(ast_goto *self, ast_label *label)
     self->target = label;
 }
 
-ast_call* ast_call_new(lex_ctx ctx,
+ast_call* ast_call_new(lex_ctx_t 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->params   = NULL;
+    self->func     = funcexpr;
+    self->va_count = NULL;
 
-    ast_type_adopt(self, funcexpr->expression.next);
+    ast_type_adopt(self, funcexpr->next);
 
     return self;
 }
@@ -889,35 +963,114 @@ void ast_call_delete(ast_call *self)
     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)
+static bool ast_call_check_vararg(ast_call *self, ast_expression *va_type, ast_expression *exp_type)
+{
+    char texp[1024];
+    char tgot[1024];
+    if (!exp_type)
+        return true;
+    if (!va_type || !ast_compare_type(va_type, exp_type))
+    {
+        if (va_type && exp_type)
+        {
+            ast_type_to_string(va_type,  tgot, sizeof(tgot));
+            ast_type_to_string(exp_type, texp, sizeof(texp));
+            if (OPTS_FLAG(UNSAFE_VARARGS)) {
+                if (compile_warning(ast_ctx(self), WARN_UNSAFE_TYPES,
+                                    "piped variadic argument differs in type: constrained to type %s, expected type %s",
+                                    tgot, texp))
+                    return false;
+            } else {
+                compile_error(ast_ctx(self),
+                              "piped variadic argument differs in type: constrained to type %s, expected type %s",
+                              tgot, texp);
+                return false;
+            }
+        }
+        else
+        {
+            ast_type_to_string(exp_type, texp, sizeof(texp));
+            if (OPTS_FLAG(UNSAFE_VARARGS)) {
+                if (compile_warning(ast_ctx(self), WARN_UNSAFE_TYPES,
+                                    "piped variadic argument may differ in type: expected type %s",
+                                    texp))
+                    return false;
+            } else {
+                compile_error(ast_ctx(self),
+                              "piped variadic argument may differ in type: expected type %s",
+                              texp);
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+bool ast_call_check_types(ast_call *self, ast_expression *va_type)
 {
+    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->expression.params))
-        count = vec_size(func->expression.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->expression.params[i]))) {
-            char texp[1024];
-            char tgot[1024];
+        if (ast_istype(self->params[i], ast_argpipe)) {
+            /* warn about type safety instead */
+            if (i+1 != count) {
+                compile_error(ast_ctx(self), "argpipe must be the last parameter to a function call");
+                return false;
+            }
+            if (!ast_call_check_vararg(self, va_type, (ast_expression*)func->params[i]))
+                retval = false;
+        }
+        else 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->expression.params[i], texp, sizeof(texp));
+            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_istype(self->params[i], ast_argpipe)) {
+                /* warn about type safety instead */
+                if (i+1 != count) {
+                    compile_error(ast_ctx(self), "argpipe must be the last parameter to a function call");
+                    return false;
+                }
+                if (!ast_call_check_vararg(self, va_type, func->varparam))
+                    retval = false;
+            }
+            else 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 variadic 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_store* ast_store_new(lex_ctx_t ctx, int op,
                          ast_expression *dest, ast_expression *source)
 {
     ast_instantiate(ast_store, ctx, ast_store_delete);
@@ -929,10 +1082,7 @@ ast_store* ast_store_new(lex_ctx ctx, int op,
     self->dest = dest;
     self->source = source;
 
-    if (!ast_type_adopt(self, dest)) {
-        ast_delete(self);
-        return NULL;
-    }
+    ast_type_adopt(self, dest);
 
     return self;
 }
@@ -945,7 +1095,7 @@ void ast_store_delete(ast_store *self)
     mem_d(self);
 }
 
-ast_block* ast_block_new(lex_ctx ctx)
+ast_block* ast_block_new(lex_ctx_t ctx)
 {
     ast_instantiate(ast_block, ctx, ast_block_delete);
     ast_expression_init((ast_expression*)self,
@@ -966,17 +1116,14 @@ bool ast_block_add_expr(ast_block *self, ast_expression *e)
         ast_delete(self->expression.next);
         self->expression.next = NULL;
     }
-    if (!ast_type_adopt(self, e)) {
-        compile_error(ast_ctx(self), "internal error: failed to adopt type");
-        return false;
-    }
+    ast_type_adopt(self, e);
     return true;
 }
 
 void ast_block_collect(ast_block *self, ast_expression *expr)
 {
     vec_push(self->collect, expr);
-    expr->expression.node.keep = true;
+    expr->node.keep = true;
 }
 
 void ast_block_delete(ast_block *self)
@@ -995,29 +1142,26 @@ void ast_block_delete(ast_block *self)
     mem_d(self);
 }
 
-bool ast_block_set_type(ast_block *self, ast_expression *from)
+void ast_block_set_type(ast_block *self, ast_expression *from)
 {
     if (self->expression.next)
         ast_delete(self->expression.next);
-    if (!ast_type_adopt(self, from))
-        return false;
-    return true;
+    ast_type_adopt(self, from);
 }
 
-ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
+ast_function* ast_function_new(lex_ctx_t ctx, const char *name, ast_value *vtype)
 {
     ast_instantiate(ast_function, ctx, ast_function_delete);
 
-    if (!vtype ||
-        vtype->hasvalue ||
-        vtype->expression.vtype != TYPE_FUNCTION)
-    {
+    if (!vtype) {
+        compile_error(ast_ctx(self), "internal error: ast_function_new condition 0");
+        goto cleanup;
+    } else if (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;
+        goto cleanup;
     }
 
     self->vtype  = vtype;
@@ -1036,7 +1180,16 @@ ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
     vtype->hasvalue = true;
     vtype->constval.vfunc = self;
 
+    self->varargs          = NULL;
+    self->argc             = NULL;
+    self->fixedparams      = NULL;
+    self->return_value     = NULL;
+
     return self;
+
+cleanup:
+    mem_d(self);
+    return NULL;
 }
 
 void ast_function_delete(ast_function *self)
@@ -1058,6 +1211,14 @@ void ast_function_delete(ast_function *self)
     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);
 }
 
@@ -1067,8 +1228,12 @@ const char* ast_function_label(ast_function *self, const char *prefix)
     size_t len;
     char  *from;
 
-    if (!opts.dump && !opts.dumpfin && !opts.debug)
+    if (!OPTS_OPTION_BOOL(OPTION_DUMP)    &&
+        !OPTS_OPTION_BOOL(OPTION_DUMPFIN) &&
+        !OPTS_OPTION_BOOL(OPTION_DEBUG))
+    {
         return NULL;
+    }
 
     id  = (self->labelcount++);
     len = strlen(prefix);
@@ -1091,12 +1256,12 @@ const char* ast_function_label(ast_function *self, const char *prefix)
  * But I can't imagine a pituation where the output is truly unnecessary.
  */
 
-void _ast_codegen_output_type(ast_expression_common *self, ir_value *out)
+static void _ast_codegen_output_type(ast_expression *self, ir_value *out)
 {
     if (out->vtype == TYPE_FIELD)
-        out->fieldtype = self->next->expression.vtype;
+        out->fieldtype = self->next->vtype;
     if (out->vtype == TYPE_FUNCTION)
-        out->outtype = self->next->expression.vtype;
+        out->outtype = self->next->vtype;
 }
 
 #define codegen_output_type(a,o) (_ast_codegen_output_type(&((a)->expression),(o)))
@@ -1126,6 +1291,63 @@ bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_valu
     return true;
 }
 
+static bool ast_global_array_set(ast_value *self)
+{
+    size_t count = vec_size(self->initlist);
+    size_t i;
+
+    if (count > self->expression.count) {
+        compile_error(ast_ctx(self), "too many elements in initializer");
+        count = self->expression.count;
+    }
+    else if (count < self->expression.count) {
+        /* add this?
+        compile_warning(ast_ctx(self), "not all elements are initialized");
+        */
+    }
+
+    for (i = 0; i != count; ++i) {
+        switch (self->expression.next->vtype) {
+            case TYPE_FLOAT:
+                if (!ir_value_set_float(self->ir_values[i], self->initlist[i].vfloat))
+                    return false;
+                break;
+            case TYPE_VECTOR:
+                if (!ir_value_set_vector(self->ir_values[i], self->initlist[i].vvec))
+                    return false;
+                break;
+            case TYPE_STRING:
+                if (!ir_value_set_string(self->ir_values[i], self->initlist[i].vstring))
+                    return false;
+                break;
+            case TYPE_ARRAY:
+                /* we don't support them in any other place yet either */
+                compile_error(ast_ctx(self), "TODO: nested arrays");
+                return false;
+            case TYPE_FUNCTION:
+                /* this requiers a bit more work - similar to the fields I suppose */
+                compile_error(ast_ctx(self), "global of type function not properly generated");
+                return false;
+            case TYPE_FIELD:
+                if (!self->initlist[i].vfield) {
+                    compile_error(ast_ctx(self), "field constant without vfield set");
+                    return false;
+                }
+                if (!self->initlist[i].vfield->ir_v) {
+                    compile_error(ast_ctx(self), "field constant generated before its field");
+                    return false;
+                }
+                if (!ir_value_set_field(self->ir_values[i], self->initlist[i].vfield->ir_v))
+                    return false;
+                break;
+            default:
+                compile_error(ast_ctx(self), "TODO: global constant type %i", self->expression.vtype);
+                break;
+        }
+    }
+    return true;
+}
+
 bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
 {
     ir_value *v = NULL;
@@ -1137,7 +1359,7 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
 
     if (self->hasvalue && self->expression.vtype == TYPE_FUNCTION)
     {
-        ir_function *func = ir_builder_create_function(ir, self->name, self->expression.next->expression.vtype);
+        ir_function *func = ir_builder_create_function(ir, self->name, self->expression.next->vtype);
         if (!func)
             return false;
         func->context = ast_ctx(self);
@@ -1145,6 +1367,8 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
 
         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;
     }
@@ -1157,14 +1381,14 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
             goto error;
         }
 
-        if (fieldtype->expression.vtype == TYPE_ARRAY) {
+        if (fieldtype->vtype == TYPE_ARRAY) {
             size_t ai;
             char   *name;
             size_t  namelen;
 
-            ast_expression_common *elemtype;
-            int                    vtype;
-            ast_value             *array = (ast_value*)fieldtype;
+            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");
@@ -1172,10 +1396,10 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
             }
 
             /* we are lame now - considering the way QC works we won't tolerate arrays > 1024 elements */
-            if (!array->expression.count || array->expression.count > opts.max_array_size)
+            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->expression;
+            elemtype = array->expression.next;
             vtype = elemtype->vtype;
 
             v = ir_builder_create_field(ir, self->name, vtype);
@@ -1187,15 +1411,17 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
             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);
-            strcpy(name, self->name);
+            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) {
-                snprintf(name + namelen, 16, "[%u]", (unsigned int)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);
@@ -1205,16 +1431,20 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
                 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->expression.vtype);
+            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;
     }
@@ -1224,11 +1454,16 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
         char   *name;
         size_t  namelen;
 
-        ast_expression_common *elemtype = &self->expression.next->expression;
+        ast_expression *elemtype = self->expression.next;
         int vtype = elemtype->vtype;
 
+        if (self->expression.flags & AST_FLAG_ARRAY_INIT && !self->expression.count) {
+            compile_error(ast_ctx(self), "array `%s' has no size", self->name);
+            return false;
+        }
+
         /* same as with field arrays */
-        if (!self->expression.count || self->expression.count > opts.max_array_size)
+        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);
@@ -1239,15 +1474,17 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
         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);
-        strcpy(name, self->name);
+        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) {
-            snprintf(name + namelen, 16, "[%u]", (unsigned int)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);
@@ -1257,6 +1494,8 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
             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);
     }
@@ -1274,6 +1513,13 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
         v->context = ast_ctx(self);
     }
 
+    /* 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;
+
+    /* initialize */
     if (self->hasvalue) {
         switch (self->expression.vtype)
         {
@@ -1290,7 +1536,7 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
                     goto error;
                 break;
             case TYPE_ARRAY:
-                compile_error(ast_ctx(self), "TODO: global constant array");
+                ast_global_array_set(self);
                 break;
             case TYPE_FUNCTION:
                 compile_error(ast_ctx(self), "global of type function not properly generated");
@@ -1315,18 +1561,14 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
                 break;
         }
     }
-
-    /* link us to the ir_value */
-    v->cvq = self->cvq;
-    self->ir_v = v;
     return true;
 
 error: /* clean up */
-    ir_value_delete(v);
+    if(v) ir_value_delete(v);
     return false;
 }
 
-bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
+static bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
 {
     ir_value *v = NULL;
 
@@ -1348,18 +1590,18 @@ bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
         char   *name;
         size_t  namelen;
 
-        ast_expression_common *elemtype = &self->expression.next->expression;
+        ast_expression *elemtype = self->expression.next;
         int vtype = elemtype->vtype;
 
         func->flags |= IR_FLAG_HAS_ARRAYS;
 
-        if (param) {
+        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.max_array_size) {
+        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);
         }
 
@@ -1371,7 +1613,7 @@ bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
 
         v = ir_function_create_local(func, self->name, vtype, param);
         if (!v) {
-            compile_error(ast_ctx(self), "ir_function_create_local failed");
+            compile_error(ast_ctx(self), "internal error: ir_function_create_local failed");
             return false;
         }
         v->context = ast_ctx(self);
@@ -1380,20 +1622,21 @@ bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
 
         namelen = strlen(self->name);
         name    = (char*)mem_a(namelen + 16);
-        strcpy(name, self->name);
+        util_strncpy(name, self->name, namelen);
 
         self->ir_values[0] = v;
         for (ai = 1; ai < self->expression.count; ++ai) {
-            snprintf(name + namelen, 16, "[%u]", (unsigned int)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), "ir_builder_create_global failed on `%s`", name);
+                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
     {
@@ -1494,14 +1737,15 @@ bool ast_function_codegen(ast_function *self, ir_builder *ir)
 {
     ir_function *irf;
     ir_value    *dummy;
-    ast_expression_common *ec;
+    ast_expression         *ec;
+    ast_expression_codegen *cgen;
     size_t    i;
 
     (void)ir;
 
     irf = self->ir_func;
     if (!irf) {
-        compile_error(ast_ctx(self), "ast_function's related ast_value was not generated yet");
+        compile_error(ast_ctx(self), "internal error: ast_function's related ast_value was not generated yet");
         return false;
     }
 
@@ -1510,7 +1754,7 @@ bool ast_function_codegen(ast_function *self, ir_builder *ir)
     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->expression.vtype);
+            vec_push(irf->params, ec->params[i]->expression.next->vtype);
         else
             vec_push(irf->params, ec->params[i]->expression.vtype);
         if (!self->builtin) {
@@ -1519,25 +1763,61 @@ bool ast_function_codegen(ast_function *self, ir_builder *ir)
         }
     }
 
+    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;
     }
 
-    self->curblock = ir_function_create_block(ast_ctx(self), irf, "entry");
+    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) {
-        ast_expression_codegen *gen = self->blocks[i]->expression.codegen;
-        if (!(*gen)((ast_expression*)self->blocks[i], self, false, &dummy))
+        cgen = self->blocks[i]->expression.codegen;
+        if (!(*cgen)((ast_expression*)self->blocks[i], self, false, &dummy))
             return false;
     }
 
@@ -1545,14 +1825,19 @@ bool ast_function_codegen(ast_function *self, ir_builder *ir)
     if (!self->curblock->final)
     {
         if (!self->vtype->expression.next ||
-            self->vtype->expression.next->expression.vtype == TYPE_VOID)
+            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))
+        else if (vec_size(self->curblock->entries) || self->curblock == irf->first)
         {
-            /* error("missing return"); */
-            if (compile_warning(ast_ctx(self), WARN_MISSING_RETURN_VALUES,
+            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))
             {
@@ -1600,7 +1885,7 @@ bool ast_block_codegen(ast_block *self, ast_function *func, bool lvalue, ir_valu
     for (i = 0; i < vec_size(self->locals); ++i)
     {
         if (!ast_local_codegen(self->locals[i], func->ir_func, false)) {
-            if (opts.debug)
+            if (OPTS_OPTION_BOOL(OPTION_DEBUG))
                 compile_error(ast_ctx(self), "failed to generate local `%s`", self->locals[i]->name);
             return false;
         }
@@ -1614,7 +1899,7 @@ bool ast_block_codegen(ast_block *self, ast_function *func, bool lvalue, ir_valu
                 return false;
             continue;
         }
-        gen = self->exprs[i]->expression.codegen;
+        gen = self->exprs[i]->codegen;
         if (!(*gen)(self->exprs[i], func, false, out))
             return false;
     }
@@ -1678,7 +1963,7 @@ bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_valu
         if (!(*cgen)((ast_expression*)(arr->setter), func, true, &funval))
             return false;
 
-        cgen = self->source->expression.codegen;
+        cgen = self->source->codegen;
         if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
             return false;
 
@@ -1693,13 +1978,13 @@ bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_valu
     {
         /* regular code */
 
-        cgen = self->dest->expression.codegen;
+        cgen = self->dest->codegen;
         /* lvalue! */
         if (!(*cgen)((ast_expression*)(self->dest), func, true, &left))
             return false;
         self->expression.outl = left;
 
-        cgen = self->source->expression.codegen;
+        cgen = self->source->codegen;
         /* rvalue! */
         if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
             return false;
@@ -1751,7 +2036,7 @@ bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_va
         merge    = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "sce_merge"));
 
         /* generate the left expression */
-        cgen = self->left->expression.codegen;
+        cgen = self->left->codegen;
         if (!(*cgen)((ast_expression*)(self->left), func, false, &left))
             return false;
         /* remember the block */
@@ -1774,7 +2059,7 @@ bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_va
         /* enter the right-expression's block */
         func->curblock = other;
         /* generate */
-        cgen = self->right->expression.codegen;
+        cgen = self->right->codegen;
         if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
             return false;
         /* remember block */
@@ -1833,14 +2118,15 @@ bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_va
         }
 
         self->expression.outr = *out;
+        codegen_output_type(self, *out);
         return true;
     }
 
-    cgen = self->left->expression.codegen;
+    cgen = self->left->codegen;
     if (!(*cgen)((ast_expression*)(self->left), func, false, &left))
         return false;
 
-    cgen = self->right->expression.codegen;
+    cgen = self->right->codegen;
     if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
         return false;
 
@@ -1849,6 +2135,7 @@ bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_va
     if (!*out)
         return false;
     self->expression.outr = *out;
+    codegen_output_type(self, *out);
 
     return true;
 }
@@ -1890,12 +2177,12 @@ bool ast_binstore_codegen(ast_binstore *self, ast_function *func, bool lvalue, i
         if (!(*cgen)((ast_expression*)(idx), func, false, &iridx))
             return false;
     }
-    cgen = self->dest->expression.codegen;
+    cgen = self->dest->codegen;
     if (!(*cgen)((ast_expression*)(self->dest), func, false, &leftr))
         return false;
 
     /* source as rvalue only */
-    cgen = self->source->expression.codegen;
+    cgen = self->source->codegen;
     if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
         return false;
 
@@ -1933,7 +2220,7 @@ bool ast_binstore_codegen(ast_binstore *self, ast_function *func, bool lvalue, i
         self->expression.outr = bin;
     } else {
         /* now store them */
-        cgen = self->dest->expression.codegen;
+        cgen = self->dest->codegen;
         /* lvalue of destination */
         if (!(*cgen)((ast_expression*)(self->dest), func, true, &leftl))
             return false;
@@ -1972,7 +2259,7 @@ bool ast_unary_codegen(ast_unary *self, ast_function *func, bool lvalue, ir_valu
         return true;
     }
 
-    cgen = self->operand->expression.codegen;
+    cgen = self->operand->codegen;
     /* lvalue! */
     if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
         return false;
@@ -2008,7 +2295,7 @@ bool ast_return_codegen(ast_return *self, ast_function *func, bool lvalue, ir_va
     self->expression.outr = (ir_value*)1;
 
     if (self->operand) {
-        cgen = self->operand->expression.codegen;
+        cgen = self->operand->codegen;
         /* lvalue! */
         if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
             return false;
@@ -2043,11 +2330,11 @@ bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, i
         return true;
     }
 
-    cgen = self->entity->expression.codegen;
+    cgen = self->entity->codegen;
     if (!(*cgen)((ast_expression*)(self->entity), func, false, &ent))
         return false;
 
-    cgen = self->field->expression.codegen;
+    cgen = self->field->codegen;
     if (!(*cgen)((ast_expression*)(self->field), func, false, &field))
         return false;
 
@@ -2058,7 +2345,7 @@ bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, i
     } 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: 
+        /* Done AFTER error checking:
         codegen_output_type(self, *out);
         */
     }
@@ -2095,12 +2382,12 @@ bool ast_member_codegen(ast_member *self, ast_function *func, bool lvalue, ir_va
         return true;
     }
 
-    cgen = self->owner->expression.codegen;
+    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->expression.next->expression.vtype == TYPE_VECTOR))
+        !(vec->vtype == TYPE_FIELD && self->owner->next->vtype == TYPE_VECTOR))
     {
         return false;
     }
@@ -2118,9 +2405,11 @@ bool ast_array_index_codegen(ast_array_index *self, ast_function *func, bool lva
 
     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)) {
@@ -2152,7 +2441,7 @@ bool ast_array_index_codegen(ast_array_index *self, ast_function *func, bool lva
             return false;
         }
 
-        cgen = self->index->expression.codegen;
+        cgen = self->index->codegen;
         if (!(*cgen)((ast_expression*)(self->index), func, false, &iridx))
             return false;
 
@@ -2167,12 +2456,14 @@ bool ast_array_index_codegen(ast_array_index *self, ast_function *func, bool lva
 
         *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->expression.count)
+        if (arridx >= self->array->count)
         {
             compile_error(ast_ctx(self), "array index out of bounds: %i", arridx);
             return false;
@@ -2181,7 +2472,7 @@ bool ast_array_index_codegen(ast_array_index *self, ast_function *func, bool lva
     }
     else if (idx->expression.vtype == TYPE_INTEGER) {
         unsigned int arridx = idx->constval.vint;
-        if (arridx >= self->array->expression.count)
+        if (arridx >= self->array->count)
         {
             compile_error(ast_ctx(self), "array index out of bounds: %i", arridx);
             return false;
@@ -2192,9 +2483,24 @@ bool ast_array_index_codegen(ast_array_index *self, ast_function *func, bool lva
         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_argpipe_codegen(ast_argpipe *self, ast_function *func, bool lvalue, ir_value **out)
+{
+    *out = NULL;
+    if (lvalue) {
+        compile_error(ast_ctx(self), "argpipe node: not an lvalue");
+        return false;
+    }
+    (void)func;
+    (void)out;
+    compile_error(ast_ctx(self), "TODO: argpipe codegen not implemented");
+    return false;
+}
+
 bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_value **out)
 {
     ast_expression_codegen *cgen;
@@ -2208,6 +2514,7 @@ bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_va
     ir_block *ontrue_endblock = NULL;
     ir_block *onfalse_endblock = NULL;
     ir_block *merge = NULL;
+    int       fold  = 0;
 
     /* We don't output any value, thus also don't care about r/lvalue */
     (void)out;
@@ -2220,14 +2527,16 @@ bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_va
     self->expression.outr = (ir_value*)1;
 
     /* generate the condition */
-    cgen = self->cond->expression.codegen;
+    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 */
-
+    /* try constant folding away the if */
+    if ((fold = fold_cond(condval, func, self)) != -1)
+        return fold;
+    
     if (self->on_true) {
         /* create on-true block */
         ontrue = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "ontrue"));
@@ -2238,7 +2547,7 @@ bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_va
         func->curblock = ontrue;
 
         /* generate */
-        cgen = self->on_true->expression.codegen;
+        cgen = self->on_true->codegen;
         if (!(*cgen)((ast_expression*)(self->on_true), func, false, &dummy))
             return false;
 
@@ -2258,7 +2567,7 @@ bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_va
         func->curblock = onfalse;
 
         /* generate */
-        cgen = self->on_false->expression.codegen;
+        cgen = self->on_false->codegen;
         if (!(*cgen)((ast_expression*)(self->on_false), func, false, &dummy))
             return false;
 
@@ -2327,7 +2636,7 @@ bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_
 
     /* generate the condition */
     func->curblock = cond;
-    cgen = self->cond->expression.codegen;
+    cgen = self->cond->codegen;
     if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
         return false;
     cond_out = func->curblock;
@@ -2342,7 +2651,7 @@ bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_
         func->curblock = ontrue;
 
         /* generate */
-        cgen = self->on_true->expression.codegen;
+        cgen = self->on_true->codegen;
         if (!(*cgen)((ast_expression*)(self->on_true), func, false, &trueval))
             return false;
 
@@ -2359,7 +2668,7 @@ bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_
         func->curblock = onfalse;
 
         /* generate */
-        cgen = self->on_false->expression.codegen;
+        cgen = self->on_false->codegen;
         if (!(*cgen)((ast_expression*)(self->on_false), func, false, &falseval))
             return false;
 
@@ -2386,15 +2695,18 @@ bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_
     /* Here, now, we need a PHI node
      * but first some sanity checking...
      */
-    if (trueval->vtype != falseval->vtype) {
+    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"), trueval->vtype);
-    if (!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);
 
@@ -2453,7 +2765,7 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
      */
     if (self->initexpr)
     {
-        cgen = self->initexpr->expression.codegen;
+        cgen = self->initexpr->codegen;
         if (!(*cgen)((ast_expression*)(self->initexpr), func, false, &dummy))
             return false;
     }
@@ -2477,7 +2789,7 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
         func->curblock = bprecond;
 
         /* generate */
-        cgen = self->precond->expression.codegen;
+        cgen = self->precond->codegen;
         if (!(*cgen)((ast_expression*)(self->precond), func, false, &precond))
             return false;
 
@@ -2531,7 +2843,7 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
 
         /* generate */
         if (self->body) {
-            cgen = self->body->expression.codegen;
+            cgen = self->body->codegen;
             if (!(*cgen)((ast_expression*)(self->body), func, false, &dummy))
                 return false;
         }
@@ -2548,7 +2860,7 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
         func->curblock = bpostcond;
 
         /* generate */
-        cgen = self->postcond->expression.codegen;
+        cgen = self->postcond->codegen;
         if (!(*cgen)((ast_expression*)(self->postcond), func, false, &postcond))
             return false;
 
@@ -2562,7 +2874,7 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
         func->curblock = bincrement;
 
         /* generate */
-        cgen = self->increment->expression.codegen;
+        cgen = self->increment->codegen;
         if (!(*cgen)((ast_expression*)(self->increment), func, false, &dummy))
             return false;
 
@@ -2575,9 +2887,13 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
     /* Now all blocks are in place */
     /* From 'bin' we jump to whatever comes first */
     if      (bprecond)   tmpblock = bprecond;
-    else if (bbody)      tmpblock = bbody;
+    else                 tmpblock = bbody;    /* can never be null */
+
+    /* DEAD CODE
     else if (bpostcond)  tmpblock = bpostcond;
     else                 tmpblock = bout;
+    */
+
     if (!ir_block_create_jump(bin, ast_ctx(self), tmpblock))
         return false;
 
@@ -2585,10 +2901,13 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
     if (bprecond)
     {
         ir_block *ontrue, *onfalse;
-        if      (bbody)      ontrue = bbody;
+        ontrue = bbody; /* can never be null */
+
+        /* all of this is dead code
         else if (bincrement) ontrue = bincrement;
-        else if (bpostcond)  ontrue = bpostcond;
-        else                 ontrue = bprecond;
+        else                 ontrue = bpostcond;
+        */
+
         onfalse = bout;
         if (self->pre_not) {
             tmpblock = ontrue;
@@ -2626,9 +2945,13 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
     {
         ir_block *ontrue, *onfalse;
         if      (bprecond)   ontrue = bprecond;
-        else if (bbody)      ontrue = bbody;
+        else                 ontrue = bbody; /* can never be null */
+
+        /* all of this is dead code
         else if (bincrement) ontrue = bincrement;
         else                 ontrue = bpostcond;
+        */
+
         onfalse = bout;
         if (self->post_not) {
             tmpblock = ontrue;
@@ -2711,7 +3034,7 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
     (void)lvalue;
     (void)out;
 
-    cgen = self->operand->expression.codegen;
+    cgen = self->operand->codegen;
     if (!(*cgen)((ast_expression*)(self->operand), func, false, &irop))
         return false;
 
@@ -2719,7 +3042,7 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
         return true;
 
     cmpinstr = type_eq_instr[irop->vtype];
-    if (cmpinstr >= AINSTR_END) {
+    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;
@@ -2744,7 +3067,7 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
         if (swcase->value) {
             /* A regular case */
             /* generate the condition operand */
-            cgen = swcase->value->expression.codegen;
+            cgen = swcase->value->codegen;
             if (!(*cgen)((ast_expression*)(swcase->value), func, false, &val))
                 return false;
             /* generate the condition */
@@ -2772,7 +3095,7 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
 
             /* enter the case */
             func->curblock = bcase;
-            cgen = swcase->code->expression.codegen;
+            cgen = swcase->code->codegen;
             if (!(*cgen)((ast_expression*)swcase->code, func, false, &dummy))
                 return false;
 
@@ -2817,7 +3140,7 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
         }
 
         /* Now generate the default code */
-        cgen = def_case->code->expression.codegen;
+        cgen = def_case->code->codegen;
         if (!(*cgen)((ast_expression*)def_case->code, func, false, &dummy))
             return false;
 
@@ -2850,6 +3173,11 @@ bool ast_label_codegen(ast_label *self, ast_function *func, bool lvalue, ir_valu
     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");
@@ -2937,7 +3265,7 @@ bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value
         return true;
     }
 
-    cgen = self->func->expression.codegen;
+    cgen = self->func->codegen;
     if (!(*cgen)((ast_expression*)(self->func), func, false, &funval))
         return false;
     if (!funval)
@@ -2951,7 +3279,7 @@ bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value
         ir_value *param;
         ast_expression *expr = self->params[i];
 
-        cgen = expr->expression.codegen;
+        cgen = expr->codegen;
         if (!(*cgen)(expr, func, false, &param))
             goto error;
         if (!param)
@@ -2959,9 +3287,23 @@ bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value
         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->expression.flags & AST_FLAG_NORETURN));
+                                     funval, !!(self->func->flags & AST_FLAG_NORETURN));
     if (!callinstr)
         goto error;