X-Git-Url: https://git.xonotic.org/?a=blobdiff_plain;f=ast.c;h=8182f7977cd6cbdcb8f3e94734decf7c03338f49;hb=e3dc56fc923e5dc8d404e91cc5ef36ef0bfcc9e6;hp=7f0c4f2e35fb84aa7aafdc4da322f3c62363a828;hpb=308e24a4d9be5de543e4673168711529d24fc806;p=xonotic%2Fgmqcc.git

diff --git a/ast.c b/ast.c
index 7f0c4f2..8182f79 100644
--- a/ast.c
+++ b/ast.c
@@ -57,12 +57,18 @@ static void ast_expression_init(ast_expression *self,
     self->expression.codegen = codegen;
     self->expression.vtype   = TYPE_VOID;
     self->expression.next    = NULL;
+    MEM_VECTOR_INIT(&self->expression, params);
 }
 
 static void ast_expression_delete(ast_expression *self)
 {
+    size_t i;
     if (self->expression.next)
         ast_delete(self->expression.next);
+    for (i = 0; i < self->expression.params_count; ++i) {
+        ast_delete(self->expression.params[i]);
+    }
+    MEM_VECTOR_CLEAR(&self->expression, params);
 }
 
 static void ast_expression_delete_full(ast_expression *self)
@@ -71,9 +77,26 @@ static void ast_expression_delete_full(ast_expression *self)
     mem_d(self);
 }
 
+MEM_VEC_FUNCTIONS(ast_expression_common, ast_value*, params)
+
+static ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex);
+static ast_value* ast_value_copy(const ast_value *self)
+{
+    ast_value *cp = ast_value_new(self->expression.node.context, self->name, self->expression.vtype);
+    if (self->expression.next) {
+        cp->expression.next = ast_type_copy(self->expression.node.context, self->expression.next);
+        if (!cp->expression.next) {
+            ast_value_delete(cp);
+            return NULL;
+        }
+    }
+    return cp;
+}
+
 static ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
 {
-    const ast_expression_common *cpex;
+    size_t i;
+    const ast_expression_common *fromex;
     ast_expression_common *selfex;
 
     if (!ex)
@@ -82,23 +105,32 @@ static ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
     {
         ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
 
-        cpex   = &ex->expression;
+        fromex   = &ex->expression;
         selfex = &self->expression;
 
-        selfex->vtype = cpex->vtype;
-        if (cpex->next)
+        /* This may never be codegen()d */
+        selfex->codegen = NULL;
+
+        selfex->vtype = fromex->vtype;
+        if (fromex->next)
         {
-            selfex->next = ast_type_copy(ctx, cpex->next);
+            selfex->next = ast_type_copy(ctx, fromex->next);
             if (!selfex->next) {
-                mem_d(self);
+                ast_expression_delete_full(self);
                 return NULL;
             }
         }
         else
             selfex->next = NULL;
 
-        /* This may never be codegen()d */
-        selfex->codegen = NULL;
+        for (i = 0; i < fromex->params_count; ++i) {
+            ast_value *v = ast_value_copy(fromex->params[i]);
+            if (!v || !ast_expression_common_params_add(selfex, v)) {
+                ast_expression_delete_full(self);
+                return NULL;
+            }
+        }
+
         return self;
     }
 }
@@ -113,7 +145,6 @@ 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;
-    MEM_VECTOR_INIT(self, params);
     self->isconst = false;
     memset(&self->constval, 0, sizeof(self->constval));
 
@@ -121,16 +152,11 @@ ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
 
     return self;
 }
-MEM_VEC_FUNCTIONS(ast_value, ast_value*, params)
 
 void ast_value_delete(ast_value* self)
 {
-    size_t i;
     if (self->name)
         mem_d((void*)self->name);
-    for (i = 0; i < self->params_count; ++i)
-        ast_value_delete(self->params[i]); /* delete, the ast_function is expected to die first */
-    MEM_VECTOR_CLEAR(self, params);
     if (self->isconst) {
         switch (self->expression.vtype)
         {
@@ -152,6 +178,11 @@ void ast_value_delete(ast_value* self)
     mem_d(self);
 }
 
+bool GMQCC_WARN ast_value_params_add(ast_value *self, ast_value *p)
+{
+    return ast_expression_common_params_add(&self->expression, p);
+}
+
 bool ast_value_set_name(ast_value *self, const char *name)
 {
     if (self->name)
@@ -193,6 +224,42 @@ void ast_binary_delete(ast_binary *self)
     mem_d(self);
 }
 
+ast_unary* ast_unary_new(lex_ctx ctx, int op,
+                         ast_expression *expr)
+{
+    ast_instantiate(ast_unary, ctx, ast_unary_delete);
+    ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_unary_codegen);
+
+    self->op = op;
+    self->operand = expr;
+
+    return self;
+}
+
+void ast_unary_delete(ast_unary *self)
+{
+    ast_unref(self->operand);
+    ast_expression_delete((ast_expression*)self);
+    mem_d(self);
+}
+
+ast_return* ast_return_new(lex_ctx ctx, ast_expression *expr)
+{
+    ast_instantiate(ast_return, ctx, ast_return_delete);
+    ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_return_codegen);
+
+    self->operand = expr;
+
+    return self;
+}
+
+void ast_return_delete(ast_return *self)
+{
+    ast_unref(self->operand);
+    ast_expression_delete((ast_expression*)self);
+    mem_d(self);
+}
+
 ast_entfield* ast_entfield_new(lex_ctx ctx, ast_expression *entity, ast_expression *field)
 {
     const ast_expression *outtype;
@@ -349,7 +416,7 @@ void ast_call_delete(ast_call *self)
 }
 
 ast_store* ast_store_new(lex_ctx ctx, int op,
-                         ast_value *dest, ast_expression *source)
+                         ast_expression *dest, ast_expression *source)
 {
     ast_instantiate(ast_store, ctx, ast_store_delete);
     ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_store_codegen);
@@ -396,6 +463,19 @@ void ast_block_delete(ast_block *self)
     mem_d(self);
 }
 
+bool ast_block_set_type(ast_block *self, ast_expression *from)
+{
+    if (self->expression.next)
+        ast_delete(self->expression.next);
+    self->expression.vtype = from->expression.vtype;
+    if (from->expression.next) {
+        self->expression.next = ast_type_copy(self->expression.node.context, from->expression.next);
+        if (!self->expression.next)
+            return false;
+    }
+    return true;
+}
+
 ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
 {
     ast_instantiate(ast_function, ctx, ast_function_delete);
@@ -615,6 +695,7 @@ bool ast_function_codegen(ast_function *self, ir_builder *ir)
 {
     ir_function *irf;
     ir_value    *dummy;
+    ast_expression_common *ec;
     size_t    i;
 
     irf = self->ir_func;
@@ -624,12 +705,13 @@ bool ast_function_codegen(ast_function *self, ir_builder *ir)
     }
 
     /* fill the parameter list */
-    for (i = 0; i < self->vtype->params_count; ++i)
+    ec = &self->vtype->expression;
+    for (i = 0; i < ec->params_count; ++i)
     {
-        if (!ir_function_params_add(irf, self->vtype->params[i]->expression.vtype))
+        if (!ir_function_params_add(irf, ec->params[i]->expression.vtype))
             return false;
         if (!self->builtin) {
-            if (!ast_local_codegen(self->vtype->params[i], self->ir_func, true))
+            if (!ast_local_codegen(ec->params[i], self->ir_func, true))
                 return false;
         }
     }
@@ -765,6 +847,50 @@ bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_va
     return true;
 }
 
+bool ast_unary_codegen(ast_unary *self, ast_function *func, bool lvalue, ir_value **out)
+{
+    ast_expression_codegen *cgen;
+    ir_value *operand;
+
+    /* In the context of a unary operation, we can disregard
+     * the lvalue flag.
+     */
+    (void)lvalue;
+
+    cgen = self->operand->expression.codegen;
+    /* lvalue! */
+    if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
+        return false;
+
+    *out = ir_block_create_unary(func->curblock, ast_function_label(func, "unary"),
+                                 self->op, operand);
+    if (!*out)
+        return false;
+
+    return true;
+}
+
+bool ast_return_codegen(ast_return *self, ast_function *func, bool lvalue, ir_value **out)
+{
+    ast_expression_codegen *cgen;
+    ir_value *operand;
+
+    /* In the context of a return operation, we can disregard
+     * the lvalue flag.
+     */
+    (void)lvalue;
+
+    cgen = self->operand->expression.codegen;
+    /* lvalue! */
+    if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
+        return false;
+
+    if (!ir_block_create_return(func->curblock, operand))
+        return false;
+
+    return true;
+}
+
 bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, ir_value **out)
 {
     ast_expression_codegen *cgen;
@@ -1260,6 +1386,7 @@ bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value
 
     *out = ir_call_value(callinstr);
 
+    MEM_VECTOR_CLEAR(&params, v);
     return true;
 error:
     MEM_VECTOR_CLEAR(&params, v);