/*
- * Copyright (C) 2012
+ * Copyright (C) 2012
* Wolfgang Bumiller
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
#include "gmqcc.h"
#include "ast.h"
-#define ast_setfunc(me, fn, what) ( *(void**)&((me)->fn) = what )
-
-#define ast_instantiate(T, ctx, destroyfn) \
- T *self = (T*)mem_a(sizeof(T)); \
- ast_node_init((ast_node*)self, ctx); \
- ast_setfunc(&((ast_node*)self)->node, destroy, destroyfn)
+#define ast_instantiate(T, ctx, destroyfn) \
+ T* self = (T*)mem_a(sizeof(T)); \
+ if (!self) { \
+ return NULL; \
+ } \
+ ast_node_init((ast_node*)self, ctx); \
+ ( (ast_node*)self )->node.destroy = (ast_node_delete*)destroyfn
/* It must not be possible to get here. */
static void _ast_node_destroy(ast_node *self)
}
/* Initialize main ast node aprts */
-static void ast_node_init(ast_node *self, lex_ctx_t ctx)
+static void ast_node_init(ast_node *self, lex_ctx ctx)
{
self->node.context = ctx;
self->node.destroy = &_ast_node_destroy;
static void ast_expression_init(ast_expression *self,
ast_expression_codegen *codegen)
{
- ast_setfunc(&self->expression, codegen, codegen);
+ self->expression.codegen = codegen;
}
-ast_value* ast_value_new(lex_ctx_t ctx, const char *name, int t, bool keep)
+ast_value* ast_value_new(lex_ctx ctx, const char *name, int t)
{
ast_instantiate(ast_value, ctx, ast_value_delete);
ast_expression_init((ast_expression*)self,
(ast_expression_codegen*)&ast_value_codegen);
- self->expression.node.keep = keep;
+ self->expression.node.keep = true; /* keep */
self->name = name ? util_strdup(name) : NULL;
self->vtype = t;
self->isconst = false;
memset(&self->constval, 0, sizeof(self->constval));
- self->ir_v = NULL;
+ self->ir_v = NULL;
return self;
}
if (self->name)
mem_d((void*)self->name);
for (i = 0; i < self->params_count; ++i)
- ast_unref(self->params[i]);
+ ast_value_delete(self->params[i]); /* delete, the ast_function is expected to die first */
MEM_VECTOR_CLEAR(self, params);
if (self->next) /* delete, not unref, types are always copied */
ast_delete(self->next);
if (self->isconst) {
switch (self->vtype)
{
- case qc_string:
+ case TYPE_STRING:
mem_d((void*)self->constval.vstring);
break;
+ case TYPE_FUNCTION:
+ /* unlink us from the function node */
+ self->constval.vfunc->vtype = NULL;
+ break;
/* NOTE: delete function? currently collected in
* the parser structure
*/
return !!self->name;
}
-ast_binary* ast_binary_new(lex_ctx_t ctx, int op,
- ast_value* left, ast_value* right)
+ast_binary* ast_binary_new(lex_ctx ctx, int op,
+ ast_expression* left, ast_expression* right)
{
ast_instantiate(ast_binary, ctx, ast_binary_delete);
ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_binary_codegen);
mem_d(self);
}
-ast_store* ast_store_new(lex_ctx_t ctx, int op,
- ast_value *dest, ast_value *source)
+ast_entfield* ast_entfield_new(lex_ctx ctx, ast_expression *entity, ast_expression *field)
+{
+ ast_instantiate(ast_entfield, ctx, ast_entfield_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_entfield_codegen);
+
+ self->entity = entity;
+ self->field = field;
+
+ return self;
+}
+
+void ast_entfield_delete(ast_entfield *self)
+{
+ ast_unref(self->entity);
+ ast_unref(self->field);
+ mem_d(self);
+}
+
+ast_ifthen* ast_ifthen_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
+{
+ ast_instantiate(ast_ifthen, ctx, ast_ifthen_delete);
+ if (!ontrue && !onfalse) {
+ /* because it is invalid */
+ mem_d(self);
+ return NULL;
+ }
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_ifthen_codegen);
+
+ self->cond = cond;
+ self->on_true = ontrue;
+ self->on_false = onfalse;
+
+ return self;
+}
+
+void ast_ifthen_delete(ast_ifthen *self)
+{
+ ast_unref(self->cond);
+ ast_unref(self->on_true);
+ ast_unref(self->on_false);
+ mem_d(self);
+}
+
+ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
+{
+ ast_instantiate(ast_ternary, ctx, ast_ternary_delete);
+ /* This time NEITHER must be NULL */
+ if (!ontrue || !onfalse) {
+ mem_d(self);
+ return NULL;
+ }
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_ternary_codegen);
+
+ self->cond = cond;
+ self->on_true = ontrue;
+ self->on_false = onfalse;
+ self->phi_out = NULL;
+
+ return self;
+}
+
+void ast_ternary_delete(ast_ternary *self)
+{
+ ast_unref(self->cond);
+ ast_unref(self->on_true);
+ ast_unref(self->on_false);
+ mem_d(self);
+}
+
+ast_store* ast_store_new(lex_ctx ctx, int op,
+ ast_value *dest, ast_expression *source)
{
ast_instantiate(ast_store, ctx, ast_store_delete);
ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_store_codegen);
mem_d(self);
}
-ast_block* ast_block_new(lex_ctx_t ctx)
+ast_block* ast_block_new(lex_ctx ctx)
{
ast_instantiate(ast_block, ctx, ast_block_delete);
ast_expression_init((ast_expression*)self,
void ast_block_delete(ast_block *self)
{
size_t i;
- for (i = 0; i < self->locals_count; ++i)
- ast_delete(self->locals[i]);
- MEM_VECTOR_CLEAR(self, locals);
for (i = 0; i < self->exprs_count; ++i)
ast_unref(self->exprs[i]);
MEM_VECTOR_CLEAR(self, exprs);
+ for (i = 0; i < self->locals_count; ++i)
+ ast_delete(self->locals[i]);
+ MEM_VECTOR_CLEAR(self, locals);
mem_d(self);
}
-ast_function* ast_function_new(lex_ctx_t ctx, const char *name, ast_value *vtype)
+ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
{
ast_instantiate(ast_function, ctx, ast_function_delete);
+ if (!vtype ||
+ vtype->isconst ||
+ vtype->vtype != TYPE_FUNCTION)
+ {
+ mem_d(self);
+ return NULL;
+ }
+
self->vtype = vtype;
self->name = name ? util_strdup(name) : NULL;
MEM_VECTOR_INIT(self, blocks);
+ self->ir_func = NULL;
+ self->curblock = NULL;
+
+ vtype->isconst = true;
+ vtype->constval.vfunc = self;
+
return self;
}
size_t i;
if (self->name)
mem_d((void*)self->name);
- if (self->vtype)
- ast_value_delete(self->vtype);
+ if (self->vtype) {
+ /* ast_value_delete(self->vtype); */
+ self->vtype->isconst = false;
+ self->vtype->constval.vfunc = NULL;
+ /* We use unref - if it was stored in a global table it is supposed
+ * to be deleted from *there*
+ */
+ ast_unref(self->vtype);
+ }
for (i = 0; i < self->blocks_count; ++i)
ast_delete(self->blocks[i]);
MEM_VECTOR_CLEAR(self, blocks);
}
/*********************************************************************/
-/* AST codegen aprt
+/* AST codegen part
+ * by convention you must never pass NULL to the 'ir_value **out'
+ * parameter. If you really don't care about the output, pass a dummy.
+ * But I can't imagine a pituation where the output is truly unnecessary.
+ */
+
+bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ /* NOTE: This is the codegen for a variable used in an expression.
+ * It is not the codegen to generate the value. For this purpose,
+ * ast_local_codegen and ast_global_codegen are to be used before this
+ * is executed. ast_function_codegen should take care of its locals,
+ * and the ast-user should take care of ast_global_codegen to be used
+ * on all the globals.
+ */
+ if (!self->ir_v)
+ return false;
+ *out = self->ir_v;
+ return true;
+}
+
+bool ast_global_codegen(ast_value *self, ir_builder *ir)
+{
+ ir_value *v = NULL;
+ if (self->isconst && self->vtype == TYPE_FUNCTION)
+ {
+ ir_function *func = ir_builder_create_function(ir, self->name);
+ if (!func)
+ return false;
+
+ self->constval.vfunc->ir_func = func;
+ /* The function is filled later on ast_function_codegen... */
+ return true;
+ }
+
+ v = ir_builder_create_global(ir, self->name, self->vtype);
+ if (!v)
+ return false;
+
+ if (self->isconst) {
+ switch (self->vtype)
+ {
+ case TYPE_FLOAT:
+ if (!ir_value_set_float(v, self->constval.vfloat))
+ goto error;
+ break;
+ case TYPE_VECTOR:
+ if (!ir_value_set_vector(v, self->constval.vvec))
+ goto error;
+ break;
+ case TYPE_STRING:
+ if (!ir_value_set_string(v, self->constval.vstring))
+ goto error;
+ break;
+ case TYPE_FUNCTION:
+ /* Cannot generate an IR value for a function,
+ * need a pointer pointing to a function rather.
+ */
+ goto error;
+ default:
+ printf("TODO: global constant type %i\n", self->vtype);
+ break;
+ }
+ }
+
+ /* link us to the ir_value */
+ self->ir_v = v;
+ return true;
+
+error: /* clean up */
+ ir_value_delete(v);
+ return false;
+}
+
+bool ast_local_codegen(ast_value *self, ir_function *func)
+{
+ ir_value *v = NULL;
+ if (self->isconst && self->vtype == TYPE_FUNCTION)
+ {
+ /* Do we allow local functions? I think not...
+ * this is NOT a function pointer atm.
+ */
+ return false;
+ }
+
+ v = ir_function_create_local(func, self->name, self->vtype);
+ if (!v)
+ return false;
+
+ /* A constant local... hmmm...
+ * I suppose the IR will have to deal with this
+ */
+ if (self->isconst) {
+ switch (self->vtype)
+ {
+ case TYPE_FLOAT:
+ if (!ir_value_set_float(v, self->constval.vfloat))
+ goto error;
+ break;
+ case TYPE_VECTOR:
+ if (!ir_value_set_vector(v, self->constval.vvec))
+ goto error;
+ break;
+ case TYPE_STRING:
+ if (!ir_value_set_string(v, self->constval.vstring))
+ goto error;
+ break;
+ default:
+ printf("TODO: global constant type %i\n", self->vtype);
+ break;
+ }
+ }
+
+ /* link us to the ir_value */
+ self->ir_v = v;
+ return true;
+
+error: /* clean up */
+ ir_value_delete(v);
+ return false;
+}
+
+bool ast_function_codegen(ast_function *self, ir_builder *ir)
+{
+ ir_function *irf;
+ ir_value *dummy;
+ size_t i;
+
+ irf = self->ir_func;
+ if (!irf) {
+ printf("ast_function's related ast_value was not generated yet\n");
+ return false;
+ }
+
+ self->curblock = ir_function_create_block(irf, "entry");
+ if (!self->curblock)
+ return false;
+
+ for (i = 0; i < self->blocks_count; ++i) {
+ ast_expression_codegen *gen = self->blocks[i]->expression.codegen;
+ if (!(*gen)((ast_expression*)self->blocks[i], self, false, &dummy))
+ return false;
+ }
+ return true;
+}
+
+/* Note, you will not see ast_block_codegen generate ir_blocks.
+ * To the AST and the IR, blocks are 2 different things.
+ * In the AST it represents a block of code, usually enclosed in
+ * curly braces {...}.
+ * While in the IR it represents a block in terms of control-flow.
*/
+bool ast_block_codegen(ast_block *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ size_t i;
-/* Some dummies so it compiles... */
-bool ast_value_codegen(ast_value *self, ast_function *func, ir_value **out)
+ /* We don't use this
+ * Note: an ast-representation using the comma-operator
+ * of the form: (a, b, c) = x should not assign to c...
+ */
+ (void)lvalue;
+
+ /* output is NULL at first, we'll have each expression
+ * assign to out output, thus, a comma-operator represention
+ * using an ast_block will return the last generated value,
+ * so: (b, c) + a executed both b and c, and returns c,
+ * which is then added to a.
+ */
+ *out = NULL;
+
+ /* generate locals */
+ for (i = 0; i < self->locals_count; ++i)
+ {
+ if (!ast_local_codegen(self->locals[i], func->ir_func))
+ return false;
+ }
+
+ for (i = 0; i < self->exprs_count; ++i)
+ {
+ ast_expression_codegen *gen = self->exprs[i]->expression.codegen;
+ if (!(*gen)(self->exprs[i], func, false, out))
+ return false;
+ }
+
+ return true;
+}
+
+bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ /* NOTE: remember: destination codegen needs to have lvalue=true */
+ return false;
+}
+
+bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_value **out)
{
return false;
}
-bool ast_block_codegen(ast_block *self, ast_function *func, ir_value **out)
+bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, ir_value **out)
{
return false;
}
-bool ast_store_codegen(ast_store *self, ast_function *func, ir_value **out)
+bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_value **out)
{
+ if (out) *out = NULL;
return false;
}
-bool ast_binary_codegen(ast_binary *self, ast_function *func, ir_value **out)
+bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_value **out)
{
+ /* In theory it shouldn't be possible to pass through a node twice, but
+ * in case we add any kind of optimization pass for the AST itself, it
+ * may still happen, thus we remember a created ir_value and simply return one
+ * if it already exists.
+ */
+ if (self->phi_out) {
+ *out = self->phi_out;
+ return true;
+ }
return false;
}
projects / xonotic / gmqcc.git / blobdiff