X-Git-Url: https://git.xonotic.org/?p=xonotic%2Fgmqcc.git;a=blobdiff_plain;f=ast.c;h=294c13b42dc175f369db95f6101868041b43a670;hp=22081b5c5e0568dbf251213a7c9c5c464d894f6b;hb=e11a17b40805b93e1e2ae80129c9d235b6d6119b;hpb=39b8d8431c5ae9cd630113932836d20e781b27ae

diff --git a/ast.c b/ast.c
index 22081b5..294c13b 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
@@ -71,8 +72,10 @@ static void ast_expression_init(ast_expression *self,
     self->expression.next     = NULL;
     self->expression.outl     = NULL;
     self->expression.outr     = NULL;
-    self->expression.variadic = false;
     self->expression.params   = NULL;
+    self->expression.count    = 0;
+    self->expression.flags    = 0;
+    self->expression.varparam = NULL;
 }
 
 static void ast_expression_delete(ast_expression *self)
@@ -107,7 +110,8 @@ ast_value* ast_value_copy(const ast_value *self)
     }
     fromex   = &self->expression;
     selfex = &cp->expression;
-    selfex->variadic = fromex->variadic;
+    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) {
@@ -132,7 +136,8 @@ bool ast_type_adopt_impl(ast_expression *self, const ast_expression *other)
     }
     fromex   = &other->expression;
     selfex = &self->expression;
-    selfex->variadic = fromex->variadic;
+    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)
@@ -183,7 +188,8 @@ ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
         else
             selfex->next = NULL;
 
-        selfex->variadic = fromex->variadic;
+        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) {
@@ -199,14 +205,20 @@ 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 == TYPE_NIL ||
+        b->expression.vtype == TYPE_NIL)
+        return true;
     if (a->expression.vtype != b->expression.vtype)
         return false;
     if (!a->expression.next != !b->expression.next)
         return false;
     if (vec_size(a->expression.params) != vec_size(b->expression.params))
         return false;
-    if (a->expression.variadic != b->expression.variadic)
+    if ((a->expression.flags & AST_FLAG_TYPE_MASK) !=
+        (b->expression.flags & AST_FLAG_TYPE_MASK) )
+    {
         return false;
+    }
     if (vec_size(a->expression.params)) {
         size_t i;
         for (i = 0; i < vec_size(a->expression.params); ++i) {
@@ -322,7 +334,8 @@ ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
     self->name = name ? util_strdup(name) : NULL;
     self->expression.vtype = t;
     self->expression.next  = NULL;
-    self->constant = false;
+    self->isfield  = false;
+    self->cvq      = CV_NONE;
     self->hasvalue = false;
     self->uses    = 0;
     memset(&self->constval, 0, sizeof(self->constval));
@@ -333,6 +346,9 @@ 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;
 }
@@ -341,6 +357,8 @@ 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)
         {
@@ -360,6 +378,10 @@ void ast_value_delete(ast_value* self)
     }
     if (self->ir_values)
         mem_d(self->ir_values);
+
+    if (self->desc)
+        mem_d(self->desc);
+
     ast_expression_delete((ast_expression*)self);
     mem_d(self);
 }
@@ -392,8 +414,13 @@ ast_binary* ast_binary_new(lex_ctx ctx, int op,
 
     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)
+    else if (op == INSTR_AND || op == INSTR_OR) {
+        if (OPTS_FLAG(PERL_LOGIC))
+            ast_type_adopt(self, right);
+        else
+            self->expression.vtype = TYPE_FLOAT;
+    }
+    else if (op == INSTR_BITAND || op == INSTR_BITOR)
         self->expression.vtype = TYPE_FLOAT;
     else if (op == INSTR_MUL_VF || op == INSTR_MUL_FV)
         self->expression.vtype = TYPE_VECTOR;
@@ -428,16 +455,10 @@ ast_binstore* ast_binstore_new(lex_ctx ctx, int storop, int op,
 
     self->keep_dest = false;
 
-    self->expression.vtype = left->expression.vtype;
-    if (left->expression.next) {
-        self->expression.next = ast_type_copy(ctx, left);
-        if (!self->expression.next) {
-            ast_delete(self);
-            return NULL;
-        }
+    if (!ast_type_adopt(self, left)) {
+        ast_delete(self);
+        return NULL;
     }
-    else
-        self->expression.next = NULL;
 
     return self;
 }
@@ -472,7 +493,7 @@ ast_unary* ast_unary_new(lex_ctx ctx, int op,
 
 void ast_unary_delete(ast_unary *self)
 {
-    ast_unref(self->operand);
+    if (self->operand) ast_unref(self->operand);
     ast_expression_delete((ast_expression*)self);
     mem_d(self);
 }
@@ -566,7 +587,8 @@ ast_member* ast_member_new(lex_ctx ctx, ast_expression *owner, unsigned int fiel
         self->expression.next = ast_shallow_type(ctx, TYPE_FLOAT);
     }
 
-    self->owner = owner;
+    self->rvalue = false;
+    self->owner  = owner;
     ast_propagate_effects(self, owner);
 
     self->field = field;
@@ -592,6 +614,14 @@ void ast_member_delete(ast_member *self)
     mem_d(self);
 }
 
+bool ast_member_set_name(ast_member *self, const char *name)
+{
+    if (self->name)
+        mem_d((void*)self->name);
+    self->name = util_strdup(name);
+    return !!self->name;
+}
+
 ast_array_index* ast_array_index_new(lex_ctx ctx, ast_expression *array, ast_expression *index)
 {
     ast_expression *outtype;
@@ -630,8 +660,10 @@ 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);
 }
@@ -671,6 +703,7 @@ void ast_ifthen_delete(ast_ifthen *self)
 
 ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
 {
+    ast_expression *exprtype = ontrue;
     ast_instantiate(ast_ternary, ctx, ast_ternary_delete);
     /* This time NEITHER must be NULL */
     if (!ontrue || !onfalse) {
@@ -686,7 +719,9 @@ 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)) {
+    if (ontrue->expression.vtype == TYPE_NIL)
+        exprtype = onfalse;
+    if (!ast_type_adopt(self, exprtype)) {
         ast_ternary_delete(self);
         return NULL;
     }
@@ -696,17 +731,20 @@ ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *
 
 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_expression *initexpr,
-                       ast_expression *precond,
-                       ast_expression *postcond,
+                       ast_expression *precond, bool pre_not,
+                       ast_expression *postcond, bool post_not,
                        ast_expression *increment,
                        ast_expression *body)
 {
@@ -719,6 +757,9 @@ ast_loop* ast_loop_new(lex_ctx ctx,
     self->increment = increment;
     self->body      = body;
 
+    self->pre_not   = pre_not;
+    self->post_not  = post_not;
+
     if (initexpr)
         ast_propagate_effects(self, initexpr);
     if (precond)
@@ -749,12 +790,13 @@ void ast_loop_delete(ast_loop *self)
     mem_d(self);
 }
 
-ast_breakcont* ast_breakcont_new(lex_ctx ctx, bool iscont)
+ast_breakcont* ast_breakcont_new(lex_ctx ctx, bool iscont, unsigned int levels)
 {
     ast_instantiate(ast_breakcont, ctx, ast_breakcont_delete);
     ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_breakcont_codegen);
 
     self->is_continue = iscont;
+    self->levels      = levels;
 
     return self;
 }
@@ -794,14 +836,17 @@ 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 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;
 }
@@ -847,16 +892,20 @@ ast_call* ast_call_new(lex_ctx ctx,
                        ast_expression *funcexpr)
 {
     ast_instantiate(ast_call, ctx, ast_call_delete);
+    if (!funcexpr->expression.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;
 
-    self->expression.vtype = funcexpr->expression.next->expression.vtype;
-    if (funcexpr->expression.next->expression.next)
-        self->expression.next = ast_type_copy(ctx, funcexpr->expression.next->expression.next);
+    ast_type_adopt(self, funcexpr->expression.next);
 
     return self;
 }
@@ -871,12 +920,17 @@ 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)
 {
+    char texp[1024];
+    char tgot[1024];
     size_t i;
     bool   retval = true;
     const  ast_expression *func = self->func;
@@ -885,9 +939,8 @@ bool ast_call_check_types(ast_call *self)
         count = vec_size(func->expression.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_compare_type(self->params[i], (ast_expression*)(func->expression.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));
             compile_error(ast_ctx(self), "invalid type for parameter %u in function call: expected %s, got %s",
@@ -896,6 +949,20 @@ bool ast_call_check_types(ast_call *self)
             retval = false;
         }
     }
+    count = vec_size(self->params);
+    if (count > vec_size(func->expression.params) && func->expression.varparam) {
+        for (; i < count; ++i) {
+            if (!ast_compare_type(self->params[i], func->expression.varparam))
+            {
+                ast_type_to_string(self->params[i], tgot, sizeof(tgot));
+                ast_type_to_string(func->expression.varparam, texp, sizeof(texp));
+                compile_error(ast_ctx(self), "invalid type for parameter %u in function call: expected %s, got %s",
+                         (unsigned int)(i+1), texp, tgot);
+                /* we don't immediately return */
+                retval = false;
+            }
+        }
+    }
     return retval;
 }
 
@@ -911,16 +978,10 @@ ast_store* ast_store_new(lex_ctx ctx, int op,
     self->dest = dest;
     self->source = source;
 
-    self->expression.vtype = dest->expression.vtype;
-    if (dest->expression.next) {
-        self->expression.next = ast_type_copy(ctx, dest);
-        if (!self->expression.next) {
-            ast_delete(self);
-            return NULL;
-        }
+    if (!ast_type_adopt(self, dest)) {
+        ast_delete(self);
+        return NULL;
     }
-    else
-        self->expression.next = NULL;
 
     return self;
 }
@@ -946,10 +1007,19 @@ ast_block* ast_block_new(lex_ctx ctx)
     return self;
 }
 
-void ast_block_add_expr(ast_block *self, ast_expression *e)
+bool ast_block_add_expr(ast_block *self, ast_expression *e)
 {
     ast_propagate_effects(self, e);
     vec_push(self->exprs, e);
+    if (self->expression.next) {
+        ast_delete(self->expression.next);
+        self->expression.next = NULL;
+    }
+    if (!ast_type_adopt(self, e)) {
+        compile_error(ast_ctx(self), "internal error: failed to adopt type");
+        return false;
+    }
+    return true;
 }
 
 void ast_block_collect(ast_block *self, ast_expression *expr)
@@ -978,14 +1048,8 @@ 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;
-    }
-    else
-        self->expression.next = NULL;
+    if (!ast_type_adopt(self, from))
+        return false;
     return true;
 }
 
@@ -997,7 +1061,7 @@ ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
         vtype->hasvalue ||
         vtype->expression.vtype != TYPE_FUNCTION)
     {
-        compile_error(ast_ctx(self), "internal error: ast_function_new condition %i %i type=%i",
+        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);
@@ -1015,12 +1079,16 @@ ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
     self->ir_func = NULL;
     self->curblock = NULL;
 
-    self->breakblock    = NULL;
-    self->continueblock = NULL;
+    self->breakblocks    = NULL;
+    self->continueblocks = NULL;
 
     vtype->hasvalue = true;
     vtype->constval.vfunc = self;
 
+    self->varargs     = NULL;
+    self->argc        = NULL;
+    self->fixedparams = NULL;
+
     return self;
 }
 
@@ -1041,6 +1109,14 @@ void ast_function_delete(ast_function *self)
     for (i = 0; i < vec_size(self->blocks); ++i)
         ast_delete(self->blocks[i]);
     vec_free(self->blocks);
+    vec_free(self->breakblocks);
+    vec_free(self->continueblocks);
+    if (self->varargs)
+        ast_delete(self->varargs);
+    if (self->argc)
+        ast_delete(self->argc);
+    if (self->fixedparams)
+        ast_unref(self->fixedparams);
     mem_d(self);
 }
 
@@ -1050,8 +1126,12 @@ const char* ast_function_label(ast_function *self, const char *prefix)
     size_t len;
     char  *from;
 
-    if (!opts_dump && !opts_dumpfin)
+    if (!OPTS_OPTION_BOOL(OPTION_DUMP)    &&
+        !OPTS_OPTION_BOOL(OPTION_DUMPFIN) &&
+        !OPTS_OPTION_BOOL(OPTION_DEBUG))
+    {
         return NULL;
+    }
 
     id  = (self->labelcount++);
     len = strlen(prefix);
@@ -1059,10 +1139,10 @@ const char* ast_function_label(ast_function *self, const char *prefix)
     from = self->labelbuf + sizeof(self->labelbuf)-1;
     *from-- = 0;
     do {
-        unsigned int digit = id % 10;
-        *from = digit + '0';
+        *from-- = (id%10) + '0';
         id /= 10;
     } while (id);
+    ++from;
     memcpy(from - len, prefix, len);
     return from - len;
 }
@@ -1074,10 +1154,24 @@ 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)
+{
+    if (out->vtype == TYPE_FIELD)
+        out->fieldtype = self->next->expression.vtype;
+    if (out->vtype == TYPE_FUNCTION)
+        out->outtype = self->next->expression.vtype;
+}
+
+#define codegen_output_type(a,o) (_ast_codegen_output_type(&((a)->expression),(o)))
+
 bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_value **out)
 {
     (void)func;
     (void)lvalue;
+    if (self->expression.vtype == TYPE_NIL) {
+        *out = func->ir_func->owner->nil;
+        return true;
+    }
     /* NOTE: This is the codegen for a variable used in an expression.
      * It is not the codegen to generate the value. For this purpose,
      * ast_local_codegen and ast_global_codegen are to be used before this
@@ -1086,9 +1180,9 @@ bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_valu
      * on all the globals.
      */
     if (!self->ir_v) {
-        char typename[1024];
-        ast_type_to_string((ast_expression*)self, typename, sizeof(typename));
-        compile_error(ast_ctx(self), "ast_value used before generated %s %s", typename, self->name);
+        char tname[1024]; /* typename is reserved in C++ */
+        ast_type_to_string((ast_expression*)self, tname, sizeof(tname));
+        compile_error(ast_ctx(self), "ast_value used before generated %s %s", tname, self->name);
         return false;
     }
     *out = self->ir_v;
@@ -1099,6 +1193,11 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
 {
     ir_value *v = NULL;
 
+    if (self->expression.vtype == TYPE_NIL) {
+        compile_error(ast_ctx(self), "internal error: trying to generate a variable of TYPE_NIL");
+        return false;
+    }
+
     if (self->hasvalue && self->expression.vtype == TYPE_FUNCTION)
     {
         ir_function *func = ir_builder_create_function(ir, self->name, self->expression.next->expression.vtype);
@@ -1109,6 +1208,8 @@ 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;
     }
@@ -1136,7 +1237,7 @@ 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;
@@ -1147,10 +1248,12 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
                 compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", self->name);
                 return false;
             }
-            if (vtype == TYPE_FIELD)
-                v->fieldtype = elemtype->next->expression.vtype;
             v->context = ast_ctx(self);
+            v->unique_life = true;
+            v->locked      = true;
             array->ir_v = self->ir_v = v;
+            if (self->expression.flags & AST_FLAG_INCLUDE_DEF)
+                self->ir_v->flags |= IR_FLAG_INCLUDE_DEF;
 
             namelen = strlen(self->name);
             name    = (char*)mem_a(namelen + 16);
@@ -1166,9 +1269,11 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
                     compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", name);
                     return false;
                 }
-                if (vtype == TYPE_FIELD)
-                    array->ir_values[ai]->fieldtype = elemtype->next->expression.vtype;
                 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);
         }
@@ -1179,6 +1284,8 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
                 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;
     }
@@ -1192,7 +1299,7 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
         int vtype = elemtype->vtype;
 
         /* 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);
@@ -1200,9 +1307,11 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
             compile_error(ast_ctx(self), "ir_builder_create_global failed `%s`", self->name);
             return false;
         }
-        if (vtype == TYPE_FIELD)
-            v->fieldtype = elemtype->next->expression.vtype;
         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);
@@ -1218,9 +1327,11 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
                 compile_error(ast_ctx(self), "ir_builder_create_global failed `%s`", name);
                 return false;
             }
-            if (vtype == TYPE_FIELD)
-                self->ir_values[ai]->fieldtype = elemtype->next->expression.vtype;
             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);
     }
@@ -1234,8 +1345,7 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
             compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", self->name);
             return false;
         }
-        if (self->expression.vtype == TYPE_FIELD)
-            v->fieldtype = self->expression.next->expression.vtype;
+        codegen_output_type(self, v);
         v->context = ast_ctx(self);
     }
 
@@ -1263,6 +1373,18 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
                 /* Cannot generate an IR value for a function,
                  * need a pointer pointing to a function rather.
                  */
+            case TYPE_FIELD:
+                if (!self->constval.vfield) {
+                    compile_error(ast_ctx(self), "field constant without vfield set");
+                    goto error;
+                }
+                if (!self->constval.vfield->ir_v) {
+                    compile_error(ast_ctx(self), "field constant generated before its field");
+                    goto error;
+                }
+                if (!ir_value_set_field(v, self->constval.vfield->ir_v))
+                    goto error;
+                break;
             default:
                 compile_error(ast_ctx(self), "TODO: global constant type %i", self->expression.vtype);
                 break;
@@ -1270,7 +1392,10 @@ bool ast_global_codegen(ast_value *self, ir_builder *ir, bool isfield)
     }
 
     /* link us to the ir_value */
+    v->cvq = self->cvq;
     self->ir_v = v;
+    if (self->expression.flags & AST_FLAG_INCLUDE_DEF)
+        self->ir_v->flags |= IR_FLAG_INCLUDE_DEF;
     return true;
 
 error: /* clean up */
@@ -1281,6 +1406,12 @@ error: /* clean up */
 bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
 {
     ir_value *v = NULL;
+
+    if (self->expression.vtype == TYPE_NIL) {
+        compile_error(ast_ctx(self), "internal error: trying to generate a variable of TYPE_NIL");
+        return false;
+    }
+
     if (self->hasvalue && self->expression.vtype == TYPE_FUNCTION)
     {
         /* Do we allow local functions? I think not...
@@ -1297,13 +1428,15 @@ bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
         ast_expression_common *elemtype = &self->expression.next->expression;
         int vtype = elemtype->vtype;
 
-        if (param) {
+        func->flags |= IR_FLAG_HAS_ARRAYS;
+
+        if (param && !(self->expression.flags & AST_FLAG_IS_VARARG)) {
             compile_error(ast_ctx(self), "array-parameters are not supported");
             return false;
         }
 
         /* we are lame now - considering the way QC works we won't tolerate arrays > 1024 elements */
-        if (!self->expression.count || self->expression.count > opts_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);
         }
 
@@ -1318,9 +1451,9 @@ bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
             compile_error(ast_ctx(self), "ir_function_create_local failed");
             return false;
         }
-        if (vtype == TYPE_FIELD)
-            v->fieldtype = elemtype->next->expression.vtype;
         v->context = ast_ctx(self);
+        v->unique_life = true;
+        v->locked      = true;
 
         namelen = strlen(self->name);
         name    = (char*)mem_a(namelen + 16);
@@ -1334,9 +1467,9 @@ bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
                 compile_error(ast_ctx(self), "ir_builder_create_global failed on `%s`", name);
                 return false;
             }
-            if (vtype == TYPE_FIELD)
-                self->ir_values[ai]->fieldtype = elemtype->next->expression.vtype;
             self->ir_values[ai]->context = ast_ctx(self);
+            self->ir_values[ai]->unique_life = true;
+            self->ir_values[ai]->locked      = true;
         }
     }
     else
@@ -1344,8 +1477,7 @@ bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
         v = ir_function_create_local(func, self->name, self->expression.vtype, param);
         if (!v)
             return false;
-        if (self->expression.vtype == TYPE_FIELD)
-            v->fieldtype = self->expression.next->expression.vtype;
+        codegen_output_type(self, v);
         v->context = ast_ctx(self);
     }
 
@@ -1374,32 +1506,73 @@ bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
     }
 
     /* link us to the ir_value */
+    v->cvq = self->cvq;
     self->ir_v = v;
 
+    if (!ast_generate_accessors(self, func->owner))
+        return false;
+    return true;
+
+error: /* clean up */
+    ir_value_delete(v);
+    return false;
+}
+
+bool ast_generate_accessors(ast_value *self, ir_builder *ir)
+{
+    size_t i;
+    bool warn = OPTS_WARN(WARN_USED_UNINITIALIZED);
+    if (!self->setter || !self->getter)
+        return true;
+    for (i = 0; i < self->expression.count; ++i) {
+        if (!self->ir_values) {
+            compile_error(ast_ctx(self), "internal error: no array values generated for `%s`", self->name);
+            return false;
+        }
+        if (!self->ir_values[i]) {
+            compile_error(ast_ctx(self), "internal error: not all array values have been generated for `%s`", self->name);
+            return false;
+        }
+        if (self->ir_values[i]->life) {
+            compile_error(ast_ctx(self), "internal error: function containing `%s` already generated", self->name);
+            return false;
+        }
+    }
+
+    opts_set(opts.warn, WARN_USED_UNINITIALIZED, false);
     if (self->setter) {
-        if (!ast_global_codegen(self->setter, func->owner, false) ||
-            !ast_function_codegen(self->setter->constval.vfunc, func->owner) ||
+        if (!ast_global_codegen  (self->setter, ir, false) ||
+            !ast_function_codegen(self->setter->constval.vfunc, ir) ||
             !ir_function_finalize(self->setter->constval.vfunc->ir_func))
+        {
+            compile_error(ast_ctx(self), "internal error: failed to generate setter for `%s`", self->name);
+            opts_set(opts.warn, WARN_USED_UNINITIALIZED, warn);
             return false;
+        }
     }
     if (self->getter) {
-        if (!ast_global_codegen(self->getter, func->owner, false) ||
-            !ast_function_codegen(self->getter->constval.vfunc, func->owner) ||
+        if (!ast_global_codegen  (self->getter, ir, false) ||
+            !ast_function_codegen(self->getter->constval.vfunc, ir) ||
             !ir_function_finalize(self->getter->constval.vfunc->ir_func))
+        {
+            compile_error(ast_ctx(self), "internal error: failed to generate getter for `%s`", self->name);
+            opts_set(opts.warn, WARN_USED_UNINITIALIZED, warn);
             return false;
+        }
+    }
+    for (i = 0; i < self->expression.count; ++i) {
+        vec_free(self->ir_values[i]->life);
     }
+    opts_set(opts.warn, WARN_USED_UNINITIALIZED, warn);
     return true;
-
-error: /* clean up */
-    ir_value_delete(v);
-    return false;
 }
 
 bool ast_function_codegen(ast_function *self, ir_builder *ir)
 {
     ir_function *irf;
     ir_value    *dummy;
-    ast_expression_common *ec;
+    ast_expression_common  *ec;
+    ast_expression_codegen *cgen;
     size_t    i;
 
     (void)ir;
@@ -1414,13 +1587,22 @@ bool ast_function_codegen(ast_function *self, ir_builder *ir)
     ec = &self->vtype->expression;
     for (i = 0; i < vec_size(ec->params); ++i)
     {
-        vec_push(irf->params, ec->params[i]->expression.vtype);
+        if (ec->params[i]->expression.vtype == TYPE_FIELD)
+            vec_push(irf->params, ec->params[i]->expression.next->expression.vtype);
+        else
+            vec_push(irf->params, ec->params[i]->expression.vtype);
         if (!self->builtin) {
             if (!ast_local_codegen(ec->params[i], self->ir_func, true))
                 return false;
         }
     }
 
+    if (self->varargs) {
+        if (!ast_local_codegen(self->varargs, self->ir_func, true))
+            return false;
+        irf->max_varargs = self->varargs->expression.count;
+    }
+
     if (self->builtin) {
         irf->builtin = self->builtin;
         return true;
@@ -1431,27 +1613,51 @@ bool ast_function_codegen(ast_function *self, ir_builder *ir)
         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;
     }
 
     /* TODO: check return types */
-    if (!self->curblock->is_return)
+    if (!self->curblock->final)
     {
         if (!self->vtype->expression.next ||
             self->vtype->expression.next->expression.vtype == TYPE_VOID)
         {
-            return ir_block_create_return(self->curblock, NULL);
+            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,
@@ -1460,7 +1666,7 @@ bool ast_function_codegen(ast_function *self, ir_builder *ir)
             {
                 return false;
             }
-            return ir_block_create_return(self->curblock, NULL);
+            return ir_block_create_return(self->curblock, ast_ctx(self), NULL);
         }
     }
     return true;
@@ -1502,7 +1708,7 @@ 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;
         }
@@ -1510,11 +1716,13 @@ bool ast_block_codegen(ast_block *self, ast_function *func, bool lvalue, ir_valu
 
     for (i = 0; i < vec_size(self->exprs); ++i)
     {
-        ast_expression_codegen *gen = self->exprs[i]->expression.codegen;
+        ast_expression_codegen *gen;
         if (func->curblock->final && !ast_istype(self->exprs[i], ast_label)) {
-            compile_error(ast_ctx(self->exprs[i]), "unreachable statement");
-            return false;
+            if (compile_warning(ast_ctx(self->exprs[i]), WARN_UNREACHABLE_CODE, "unreachable statement"))
+                return false;
+            continue;
         }
+        gen = self->exprs[i]->expression.codegen;
         if (!(*gen)(self->exprs[i], func, false, out))
             return false;
     }
@@ -1550,7 +1758,7 @@ bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_valu
         ai = (ast_array_index*)self->dest;
         idx = (ast_value*)ai->index;
 
-        if (ast_istype(ai->index, ast_value) && idx->hasvalue)
+        if (ast_istype(ai->index, ast_value) && idx->hasvalue && idx->cvq == CV_CONST)
             ai = NULL;
     }
 
@@ -1582,7 +1790,7 @@ bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_valu
         if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
             return false;
 
-        call = ir_block_create_call(func->curblock, ast_function_label(func, "store"), funval);
+        call = ir_block_create_call(func->curblock, ast_ctx(self), ast_function_label(func, "store"), funval, false);
         if (!call)
             return false;
         ir_call_param(call, iridx);
@@ -1604,7 +1812,7 @@ bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_valu
         if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
             return false;
 
-        if (!ir_block_create_store_op(func->curblock, self->op, left, right))
+        if (!ir_block_create_store_op(func->curblock, ast_ctx(self), self->op, left, right))
             return false;
         self->expression.outr = right;
     }
@@ -1637,7 +1845,7 @@ bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_va
         return true;
     }
 
-    if (OPTS_FLAG(SHORT_LOGIC) &&
+    if ((OPTS_FLAG(SHORT_LOGIC) || OPTS_FLAG(PERL_LOGIC)) &&
         (self->op == INSTR_AND || self->op == INSTR_OR))
     {
         /* short circuit evaluation */
@@ -1645,89 +1853,95 @@ bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_va
         ir_block *from_left, *from_right;
         ir_instr *phi;
         size_t    merge_id;
-        uint16_t  notop;
-
-        /* Note about casting to true boolean values:
-         * We use a single NOT for sub expressions, and an
-         * overall NOT at the end, and for that purpose swap
-         * all the jump conditions in order for the NOT to get
-         * doubled.
-         * ie: (a && b) usually becomes (!!a ? !!b : !!a)
-         * but we translate this to (!(!a ? !a : !b))
-         */
 
+        /* prepare end-block */
         merge_id = vec_size(func->ir_func->blocks);
-        merge = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "sce_merge"));
+        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;
         if (!(*cgen)((ast_expression*)(self->left), func, false, &left))
             return false;
-        if (!OPTS_FLAG(PERL_LOGIC)) {
-            notop = type_not_instr[left->vtype];
-            if (notop == AINSTR_END) {
-                compile_error(ast_ctx(self), "don't know how to cast to bool...");
-                return false;
-            }
-            left = ir_block_create_unary(func->curblock,
-                                         ast_function_label(func, "sce_not"),
-                                         notop,
-                                         left);
-        }
+        /* remember the block */
         from_left = func->curblock;
 
+        /* create a new block for the right expression */
         other = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "sce_other"));
-        if ( !(self->op == INSTR_OR) != !OPTS_FLAG(PERL_LOGIC) ) {
-            if (!ir_block_create_if(func->curblock, left, other, merge))
+        if (self->op == INSTR_AND) {
+            /* on AND: left==true -> other */
+            if (!ir_block_create_if(func->curblock, ast_ctx(self), left, other, merge))
                 return false;
         } else {
-            if (!ir_block_create_if(func->curblock, left, merge, other))
+            /* on OR: left==false -> other */
+            if (!ir_block_create_if(func->curblock, ast_ctx(self), left, merge, other))
                 return false;
         }
         /* use the likely flag */
         vec_last(func->curblock->instr)->likely = true;
 
+        /* enter the right-expression's block */
         func->curblock = other;
+        /* generate */
         cgen = self->right->expression.codegen;
         if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
             return false;
-        if (!OPTS_FLAG(PERL_LOGIC)) {
-            notop = type_not_instr[right->vtype];
-            if (notop == AINSTR_END) {
-                compile_error(ast_ctx(self), "don't know how to cast to bool...");
-                return false;
-            }
-            right = ir_block_create_unary(func->curblock,
-                                          ast_function_label(func, "sce_not"),
-                                          notop,
-                                          right);
-        }
+        /* remember block */
         from_right = func->curblock;
 
-        if (!ir_block_create_jump(func->curblock, merge))
+        /* jump to the merge block */
+        if (!ir_block_create_jump(func->curblock, ast_ctx(self), merge))
             return false;
 
         vec_remove(func->ir_func->blocks, merge_id, 1);
         vec_push(func->ir_func->blocks, merge);
 
         func->curblock = merge;
-        phi = ir_block_create_phi(func->curblock, ast_function_label(func, "sce_value"), TYPE_FLOAT);
+        phi = ir_block_create_phi(func->curblock, ast_ctx(self),
+                                  ast_function_label(func, "sce_value"),
+                                  self->expression.vtype);
         ir_phi_add(phi, from_left, left);
         ir_phi_add(phi, from_right, right);
         *out = ir_phi_value(phi);
+        if (!*out)
+            return false;
+
         if (!OPTS_FLAG(PERL_LOGIC)) {
-            notop = type_not_instr[(*out)->vtype];
-            if (notop == AINSTR_END) {
-                compile_error(ast_ctx(self), "don't know how to cast to bool...");
-                return false;
+            /* cast-to-bool */
+            if (OPTS_FLAG(CORRECT_LOGIC) && (*out)->vtype == TYPE_VECTOR) {
+                *out = ir_block_create_unary(func->curblock, ast_ctx(self),
+                                             ast_function_label(func, "sce_bool_v"),
+                                             INSTR_NOT_V, *out);
+                if (!*out)
+                    return false;
+                *out = ir_block_create_unary(func->curblock, ast_ctx(self),
+                                             ast_function_label(func, "sce_bool"),
+                                             INSTR_NOT_F, *out);
+                if (!*out)
+                    return false;
+            }
+            else if (OPTS_FLAG(FALSE_EMPTY_STRINGS) && (*out)->vtype == TYPE_STRING) {
+                *out = ir_block_create_unary(func->curblock, ast_ctx(self),
+                                             ast_function_label(func, "sce_bool_s"),
+                                             INSTR_NOT_S, *out);
+                if (!*out)
+                    return false;
+                *out = ir_block_create_unary(func->curblock, ast_ctx(self),
+                                             ast_function_label(func, "sce_bool"),
+                                             INSTR_NOT_F, *out);
+                if (!*out)
+                    return false;
+            }
+            else {
+                *out = ir_block_create_binop(func->curblock, ast_ctx(self),
+                                             ast_function_label(func, "sce_bool"),
+                                             INSTR_AND, *out, *out);
+                if (!*out)
+                    return false;
             }
-            *out = ir_block_create_unary(func->curblock,
-                                         ast_function_label(func, "sce_final_not"),
-                                         notop,
-                                         *out);
         }
-        if (!*out)
-            return false;
+
         self->expression.outr = *out;
+        codegen_output_type(self, *out);
         return true;
     }
 
@@ -1739,11 +1953,12 @@ bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_va
     if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
         return false;
 
-    *out = ir_block_create_binop(func->curblock, ast_function_label(func, "bin"),
+    *out = ir_block_create_binop(func->curblock, ast_ctx(self), ast_function_label(func, "bin"),
                                  self->op, left, right);
     if (!*out)
         return false;
     self->expression.outr = *out;
+    codegen_output_type(self, *out);
 
     return true;
 }
@@ -1774,7 +1989,7 @@ bool ast_binstore_codegen(ast_binstore *self, ast_function *func, bool lvalue, i
         ai = (ast_array_index*)self->dest;
         idx = (ast_value*)ai->index;
 
-        if (ast_istype(ai->index, ast_value) && idx->hasvalue)
+        if (ast_istype(ai->index, ast_value) && idx->hasvalue && idx->cvq == CV_CONST)
             ai = NULL;
     }
 
@@ -1795,7 +2010,7 @@ bool ast_binstore_codegen(ast_binstore *self, ast_function *func, bool lvalue, i
         return false;
 
     /* now the binary */
-    bin = ir_block_create_binop(func->curblock, ast_function_label(func, "binst"),
+    bin = ir_block_create_binop(func->curblock, ast_ctx(self), ast_function_label(func, "binst"),
                                 self->opbin, leftr, right);
     self->expression.outr = bin;
 
@@ -1820,7 +2035,7 @@ bool ast_binstore_codegen(ast_binstore *self, ast_function *func, bool lvalue, i
         if (!(*cgen)((ast_expression*)(arr->setter), func, true, &funval))
             return false;
 
-        call = ir_block_create_call(func->curblock, ast_function_label(func, "store"), funval);
+        call = ir_block_create_call(func->curblock, ast_ctx(self), ast_function_label(func, "store"), funval, false);
         if (!call)
             return false;
         ir_call_param(call, iridx);
@@ -1834,7 +2049,7 @@ bool ast_binstore_codegen(ast_binstore *self, ast_function *func, bool lvalue, i
             return false;
         self->expression.outl = leftl;
 
-        if (!ir_block_create_store_op(func->curblock, self->opstore, leftl, bin))
+        if (!ir_block_create_store_op(func->curblock, ast_ctx(self), self->opstore, leftl, bin))
             return false;
         self->expression.outr = bin;
     }
@@ -1872,7 +2087,7 @@ bool ast_unary_codegen(ast_unary *self, ast_function *func, bool lvalue, ir_valu
     if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
         return false;
 
-    *out = ir_block_create_unary(func->curblock, ast_function_label(func, "unary"),
+    *out = ir_block_create_unary(func->curblock, ast_ctx(self), ast_function_label(func, "unary"),
                                  self->op, operand);
     if (!*out)
         return false;
@@ -1908,10 +2123,10 @@ bool ast_return_codegen(ast_return *self, ast_function *func, bool lvalue, ir_va
         if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
             return false;
 
-        if (!ir_block_create_return(func->curblock, operand))
+        if (!ir_block_create_return(func->curblock, ast_ctx(self), operand))
             return false;
     } else {
-        if (!ir_block_create_return(func->curblock, NULL))
+        if (!ir_block_create_return(func->curblock, ast_ctx(self), NULL))
             return false;
     }
 
@@ -1948,11 +2163,14 @@ bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, i
 
     if (lvalue) {
         /* address! */
-        *out = ir_block_create_fieldaddress(func->curblock, ast_function_label(func, "efa"),
+        *out = ir_block_create_fieldaddress(func->curblock, ast_ctx(self), ast_function_label(func, "efa"),
                                             ent, field);
     } else {
-        *out = ir_block_create_load_from_ent(func->curblock, ast_function_label(func, "efv"),
+        *out = ir_block_create_load_from_ent(func->curblock, ast_ctx(self), ast_function_label(func, "efv"),
                                              ent, field, self->expression.vtype);
+        /* Done AFTER error checking: 
+        codegen_output_type(self, *out);
+        */
     }
     if (!*out) {
         compile_error(ast_ctx(self), "failed to create %s instruction (output type %s)",
@@ -1960,6 +2178,8 @@ bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, i
                  type_name[self->expression.vtype]);
         return false;
     }
+    if (!lvalue)
+        codegen_output_type(self, *out);
 
     if (lvalue)
         self->expression.outl = *out;
@@ -1976,14 +2196,17 @@ bool ast_member_codegen(ast_member *self, ast_function *func, bool lvalue, ir_va
     ir_value *vec;
 
     /* in QC this is always an lvalue */
-    (void)lvalue;
+    if (lvalue && self->rvalue) {
+        compile_error(ast_ctx(self), "not an l-value (member access)");
+        return false;
+    }
     if (self->expression.outl) {
         *out = self->expression.outl;
         return true;
     }
 
     cgen = self->owner->expression.codegen;
-    if (!(*cgen)((ast_expression*)(self->owner), func, true, &vec))
+    if (!(*cgen)((ast_expression*)(self->owner), func, false, &vec))
         return false;
 
     if (vec->vtype != TYPE_VECTOR &&
@@ -2023,7 +2246,7 @@ bool ast_array_index_codegen(ast_array_index *self, ast_function *func, bool lva
     arr = (ast_value*)self->array;
     idx = (ast_value*)self->index;
 
-    if (!ast_istype(self->index, ast_value) || !idx->hasvalue) {
+    if (!ast_istype(self->index, ast_value) || !idx->hasvalue || idx->cvq != CV_CONST) {
         /* Time to use accessor functions */
         ast_expression_codegen *cgen;
         ir_value               *iridx, *funval;
@@ -2047,24 +2270,42 @@ bool ast_array_index_codegen(ast_array_index *self, ast_function *func, bool lva
         if (!(*cgen)((ast_expression*)(arr->getter), func, true, &funval))
             return false;
 
-        call = ir_block_create_call(func->curblock, ast_function_label(func, "fetch"), funval);
+        call = ir_block_create_call(func->curblock, ast_ctx(self), ast_function_label(func, "fetch"), funval, false);
         if (!call)
             return false;
         ir_call_param(call, iridx);
 
         *out = ir_call_value(call);
         self->expression.outr = *out;
+        (*out)->vtype = self->expression.vtype;
+        codegen_output_type(self, *out);
         return true;
     }
 
-    if (idx->expression.vtype == TYPE_FLOAT)
-        *out = arr->ir_values[(int)idx->constval.vfloat];
-    else if (idx->expression.vtype == TYPE_INTEGER)
-        *out = arr->ir_values[idx->constval.vint];
+    if (idx->expression.vtype == TYPE_FLOAT) {
+        unsigned int arridx = idx->constval.vfloat;
+        if (arridx >= self->array->expression.count)
+        {
+            compile_error(ast_ctx(self), "array index out of bounds: %i", arridx);
+            return false;
+        }
+        *out = arr->ir_values[arridx];
+    }
+    else if (idx->expression.vtype == TYPE_INTEGER) {
+        unsigned int arridx = idx->constval.vint;
+        if (arridx >= self->array->expression.count)
+        {
+            compile_error(ast_ctx(self), "array index out of bounds: %i", arridx);
+            return false;
+        }
+        *out = arr->ir_values[arridx];
+    }
     else {
         compile_error(ast_ctx(self), "array indexing here needs an integer constant");
         return false;
     }
+    (*out)->vtype = self->expression.vtype;
+    codegen_output_type(self, *out);
     return true;
 }
 
@@ -2075,7 +2316,7 @@ bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_va
     ir_value *condval;
     ir_value *dummy;
 
-    ir_block *cond = func->curblock;
+    ir_block *cond;
     ir_block *ontrue;
     ir_block *onfalse;
     ir_block *ontrue_endblock = NULL;
@@ -2147,9 +2388,9 @@ bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_va
         if (!merge)
             return false;
         /* add jumps ot the merge block */
-        if (ontrue && !ontrue_endblock->final && !ir_block_create_jump(ontrue_endblock, merge))
+        if (ontrue && !ontrue_endblock->final && !ir_block_create_jump(ontrue_endblock, ast_ctx(self), merge))
             return false;
-        if (onfalse && !onfalse_endblock->final && !ir_block_create_jump(onfalse_endblock, merge))
+        if (onfalse && !onfalse_endblock->final && !ir_block_create_jump(onfalse_endblock, ast_ctx(self), merge))
             return false;
 
         /* Now enter the merge block */
@@ -2158,7 +2399,7 @@ bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_va
 
     /* we create the if here, that way all blocks are ordered :)
      */
-    if (!ir_block_create_if(cond, condval,
+    if (!ir_block_create_if(cond, ast_ctx(self), condval,
                             (ontrue  ? ontrue  : merge),
                             (onfalse ? onfalse : merge)))
     {
@@ -2244,13 +2485,13 @@ bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_
     if (!merge)
         return false;
     /* jump to merge block */
-    if (!ir_block_create_jump(ontrue_out, merge))
+    if (!ir_block_create_jump(ontrue_out, ast_ctx(self), merge))
         return false;
-    if (!ir_block_create_jump(onfalse_out, merge))
+    if (!ir_block_create_jump(onfalse_out, ast_ctx(self), merge))
         return false;
 
     /* create if instruction */
-    if (!ir_block_create_if(cond_out, condval, ontrue, onfalse))
+    if (!ir_block_create_if(cond_out, ast_ctx(self), condval, ontrue, onfalse))
         return false;
 
     /* Now enter the merge block */
@@ -2259,21 +2500,26 @@ 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_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);
 
     self->expression.outr = ir_phi_value(phi);
     *out = self->expression.outr;
 
+    codegen_output_type(self, *out);
+
     return true;
 }
 
@@ -2302,9 +2548,6 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
     ir_block *bcontinue     = NULL;
     ir_block *bbreak        = NULL;
 
-    ir_block *old_bcontinue = NULL;
-    ir_block *old_bbreak    = NULL;
-
     ir_block *tmpblock      = NULL;
 
     (void)lvalue;
@@ -2388,7 +2631,7 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
     bbreak = bout;
 
     /* The loop body... */
-    if (self->body)
+    /* if (self->body) */
     {
         bbody = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "loop_body"));
         if (!bbody)
@@ -2397,21 +2640,22 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
         /* enter */
         func->curblock = bbody;
 
-        old_bbreak          = func->breakblock;
-        old_bcontinue       = func->continueblock;
-        func->breakblock    = bbreak;
-        func->continueblock = bcontinue;
-        if (!func->continueblock)
-            func->continueblock = bbody;
+        vec_push(func->breakblocks,    bbreak);
+        if (bcontinue)
+            vec_push(func->continueblocks, bcontinue);
+        else
+            vec_push(func->continueblocks, bbody);
 
         /* generate */
-        cgen = self->body->expression.codegen;
-        if (!(*cgen)((ast_expression*)(self->body), func, false, &dummy))
-            return false;
+        if (self->body) {
+            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;
+        vec_pop(func->breakblocks);
+        vec_pop(func->continueblocks);
     }
 
     /* post-loop-condition */
@@ -2451,7 +2695,7 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
     else if (bbody)      tmpblock = bbody;
     else if (bpostcond)  tmpblock = bpostcond;
     else                 tmpblock = bout;
-    if (!ir_block_create_jump(bin, tmpblock))
+    if (!ir_block_create_jump(bin, ast_ctx(self), tmpblock))
         return false;
 
     /* From precond */
@@ -2463,7 +2707,12 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
         else if (bpostcond)  ontrue = bpostcond;
         else                 ontrue = bprecond;
         onfalse = bout;
-        if (!ir_block_create_if(end_bprecond, precond, ontrue, onfalse))
+        if (self->pre_not) {
+            tmpblock = ontrue;
+            ontrue   = onfalse;
+            onfalse  = tmpblock;
+        }
+        if (!ir_block_create_if(end_bprecond, ast_ctx(self), precond, ontrue, onfalse))
             return false;
     }
 
@@ -2474,7 +2723,7 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
         else if (bpostcond)  tmpblock = bpostcond;
         else if (bprecond)   tmpblock = bprecond;
         else                 tmpblock = bbody;
-        if (!end_bbody->final && !ir_block_create_jump(end_bbody, tmpblock))
+        if (!end_bbody->final && !ir_block_create_jump(end_bbody, ast_ctx(self), tmpblock))
             return false;
     }
 
@@ -2485,7 +2734,7 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
         else if (bprecond)   tmpblock = bprecond;
         else if (bbody)      tmpblock = bbody;
         else                 tmpblock = bout;
-        if (!ir_block_create_jump(end_bincrement, tmpblock))
+        if (!ir_block_create_jump(end_bincrement, ast_ctx(self), tmpblock))
             return false;
     }
 
@@ -2498,7 +2747,12 @@ bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value
         else if (bincrement) ontrue = bincrement;
         else                 ontrue = bpostcond;
         onfalse = bout;
-        if (!ir_block_create_if(end_bpostcond, postcond, ontrue, onfalse))
+        if (self->post_not) {
+            tmpblock = ontrue;
+            ontrue   = onfalse;
+            onfalse  = tmpblock;
+        }
+        if (!ir_block_create_if(end_bpostcond, ast_ctx(self), postcond, ontrue, onfalse))
             return false;
     }
 
@@ -2527,16 +2781,16 @@ bool ast_breakcont_codegen(ast_breakcont *self, ast_function *func, bool lvalue,
     self->expression.outr = (ir_value*)1;
 
     if (self->is_continue)
-        target = func->continueblock;
+        target = func->continueblocks[vec_size(func->continueblocks)-1-self->levels];
     else
-        target = func->breakblock;
+        target = func->breakblocks[vec_size(func->breakblocks)-1-self->levels];
 
     if (!target) {
         compile_error(ast_ctx(self), "%s is lacking a target block", (self->is_continue ? "continue" : "break"));
         return false;
     }
 
-    if (!ir_block_create_jump(func->curblock, target))
+    if (!ir_block_create_jump(func->curblock, ast_ctx(self), target))
         return false;
     return true;
 }
@@ -2545,12 +2799,13 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
 {
     ast_expression_codegen *cgen;
 
-    ast_switch_case *def_case  = NULL;
-    ir_block        *def_bfall = NULL;
+    ast_switch_case *def_case     = NULL;
+    ir_block        *def_bfall    = NULL;
+    ir_block        *def_bfall_to = NULL;
+    bool set_def_bfall_to = false;
 
     ir_value *dummy     = NULL;
     ir_value *irop      = NULL;
-    ir_block *old_break = NULL;
     ir_block *bout      = NULL;
     ir_block *bfall     = NULL;
     size_t    bout_id;
@@ -2581,7 +2836,7 @@ 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;
@@ -2593,8 +2848,7 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
         return false;
 
     /* setup the break block */
-    old_break        = func->breakblock;
-    func->breakblock = bout;
+    vec_push(func->breakblocks, bout);
 
     /* Now create all cases */
     for (c = 0; c < vec_size(self->cases); ++c) {
@@ -2611,7 +2865,7 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
             if (!(*cgen)((ast_expression*)(swcase->value), func, false, &val))
                 return false;
             /* generate the condition */
-            cond = ir_block_create_binop(func->curblock, ast_function_label(func, "switch_eq"), cmpinstr, irop, val);
+            cond = ir_block_create_binop(func->curblock, ast_ctx(self), ast_function_label(func, "switch_eq"), cmpinstr, irop, val);
             if (!cond)
                 return false;
 
@@ -2620,12 +2874,16 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
             bnot = ir_function_create_block(ast_ctx(self), func->ir_func, ast_function_label(func, "not_case"));
             if (!bcase || !bnot)
                 return false;
-            if (!ir_block_create_if(func->curblock, cond, bcase, bnot))
+            if (set_def_bfall_to) {
+                set_def_bfall_to = false;
+                def_bfall_to = bcase;
+            }
+            if (!ir_block_create_if(func->curblock, ast_ctx(self), cond, bcase, bnot))
                 return false;
 
             /* Make the previous case-end fall through */
             if (bfall && !bfall->final) {
-                if (!ir_block_create_jump(bfall, bcase))
+                if (!ir_block_create_jump(bfall, ast_ctx(self), bcase))
                     return false;
             }
 
@@ -2649,11 +2907,13 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
             bfall     = NULL;
             /* remember which case it was */
             def_case  = swcase;
+            /* And the next case will be remembered */
+            set_def_bfall_to = true;
         }
     }
 
     /* Jump from the last bnot to bout */
-    if (bfall && !bfall->final && !ir_block_create_jump(bfall, bout)) {
+    if (bfall && !bfall->final && !ir_block_create_jump(bfall, ast_ctx(self), bout)) {
         /*
         astwarning(ast_ctx(bfall), WARN_???, "missing break after last case");
         */
@@ -2669,7 +2929,7 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
 
         /* Insert the fallthrough jump */
         if (def_bfall && !def_bfall->final) {
-            if (!ir_block_create_jump(def_bfall, bcase))
+            if (!ir_block_create_jump(def_bfall, ast_ctx(self), bcase))
                 return false;
         }
 
@@ -2677,16 +2937,23 @@ bool ast_switch_codegen(ast_switch *self, ast_function *func, bool lvalue, ir_va
         cgen = def_case->code->expression.codegen;
         if (!(*cgen)((ast_expression*)def_case->code, func, false, &dummy))
             return false;
+
+        /* see if we need to fall through */
+        if (def_bfall_to && !func->curblock->final)
+        {
+            if (!ir_block_create_jump(func->curblock, ast_ctx(self), def_bfall_to))
+                return false;
+        }
     }
 
     /* Jump from the last bnot to bout */
-    if (!func->curblock->final && !ir_block_create_jump(func->curblock, bout))
+    if (!func->curblock->final && !ir_block_create_jump(func->curblock, ast_ctx(self), bout))
         return false;
     /* enter the outgoing block */
     func->curblock = bout;
 
     /* restore the break block */
-    func->breakblock = old_break;
+    vec_pop(func->breakblocks);
 
     /* Move 'bout' to the end, it's nicer */
     vec_remove(func->ir_func->blocks, bout_id, 1);
@@ -2700,6 +2967,11 @@ 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");
@@ -2713,7 +2985,7 @@ bool ast_label_codegen(ast_label *self, ast_function *func, bool lvalue, ir_valu
         return false;
     }
     if (!func->curblock->final) {
-        if (!ir_block_create_jump(func->curblock, self->irblock))
+        if (!ir_block_create_jump(func->curblock, ast_ctx(self), self->irblock))
             return false;
     }
 
@@ -2741,14 +3013,14 @@ bool ast_goto_codegen(ast_goto *self, ast_function *func, bool lvalue, ir_value
         if (self->irblock_from) {
             /* we already tried once, this is the callback */
             self->irblock_from->final = false;
-            if (!ir_block_create_jump(self->irblock_from, self->target->irblock)) {
+            if (!ir_block_create_goto(self->irblock_from, ast_ctx(self), self->target->irblock)) {
                 compile_error(ast_ctx(self), "failed to generate goto to `%s`", self->name);
                 return false;
             }
         }
         else
         {
-            if (!ir_block_create_jump(func->curblock, self->target->irblock)) {
+            if (!ir_block_create_goto(func->curblock, ast_ctx(self), self->target->irblock)) {
                 compile_error(ast_ctx(self), "failed to generate goto to `%s`", self->name);
                 return false;
             }
@@ -2809,7 +3081,23 @@ bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value
         vec_push(params, param);
     }
 
-    callinstr = ir_block_create_call(func->curblock, ast_function_label(func, "call"), funval);
+    /* varargs counter */
+    if (self->va_count) {
+        ir_value   *va_count;
+        ir_builder *builder = func->curblock->owner->owner;
+        cgen = self->va_count->expression.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));
     if (!callinstr)
         goto error;
 
@@ -2820,6 +3108,8 @@ bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value
     *out = ir_call_value(callinstr);
     self->expression.outr = *out;
 
+    codegen_output_type(self, *out);
+
     vec_free(params);
     return true;
 error: