/*
- * 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, TYPE_##T); \
+ ( (ast_node*)self )->node.destroy = (ast_node_delete*)destroyfn
/* It must not be possible to get here. */
-static void _ast_node_destroy(ast_node *self)
+static GMQCC_NORETURN void _ast_node_destroy(ast_node *self)
{
fprintf(stderr, "ast node missing destroy()\n");
abort();
}
/* 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, int nodetype)
{
self->node.context = ctx;
self->node.destroy = &_ast_node_destroy;
self->node.keep = false;
+ self->node.nodetype = nodetype;
}
/* General expression initialization */
static void ast_expression_init(ast_expression *self,
ast_expression_codegen *codegen)
{
- ast_setfunc(&self->expression, codegen, codegen);
+ self->expression.codegen = codegen;
+ self->expression.vtype = TYPE_VOID;
+ self->expression.next = NULL;
+ MEM_VECTOR_INIT(&self->expression, params);
+}
+
+static void ast_expression_delete(ast_expression *self)
+{
+ size_t i;
+ if (self->expression.next)
+ ast_delete(self->expression.next);
+ for (i = 0; i < self->expression.params_count; ++i) {
+ ast_delete(self->expression.params[i]);
+ }
+ MEM_VECTOR_CLEAR(&self->expression, params);
+}
+
+static void ast_expression_delete_full(ast_expression *self)
+{
+ ast_expression_delete(self);
+ mem_d(self);
+}
+
+MEM_VEC_FUNCTIONS(ast_expression_common, ast_value*, params)
+
+static ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex);
+static ast_value* ast_value_copy(const ast_value *self)
+{
+ ast_value *cp = ast_value_new(self->expression.node.context, self->name, self->expression.vtype);
+ if (self->expression.next) {
+ cp->expression.next = ast_type_copy(self->expression.node.context, self->expression.next);
+ if (!cp->expression.next) {
+ ast_value_delete(cp);
+ return NULL;
+ }
+ }
+ return cp;
+}
+
+static ast_expression* ast_type_copy(lex_ctx ctx, const ast_expression *ex)
+{
+ size_t i;
+ const ast_expression_common *fromex;
+ ast_expression_common *selfex;
+
+ if (!ex)
+ return NULL;
+ else
+ {
+ ast_instantiate(ast_expression, ctx, ast_expression_delete_full);
+
+ fromex = &ex->expression;
+ selfex = &self->expression;
+
+ /* This may never be codegen()d */
+ selfex->codegen = NULL;
+
+ selfex->vtype = fromex->vtype;
+ if (fromex->next)
+ {
+ selfex->next = ast_type_copy(ctx, fromex->next);
+ if (!selfex->next) {
+ ast_expression_delete_full(self);
+ return NULL;
+ }
+ }
+ else
+ selfex->next = NULL;
+
+ for (i = 0; i < fromex->params_count; ++i) {
+ ast_value *v = ast_value_copy(fromex->params[i]);
+ if (!v || !ast_expression_common_params_add(selfex, v)) {
+ ast_expression_delete_full(self);
+ return NULL;
+ }
+ }
+
+ return self;
+ }
}
-ast_value* ast_value_new(lex_ctx_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->next = NULL;
- MEM_VECTOR_INIT(self, params);
+ self->expression.vtype = t;
+ self->expression.next = NULL;
self->isconst = false;
memset(&self->constval, 0, sizeof(self->constval));
- self->ir_v = NULL;
+ self->ir_v = NULL;
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_unref(self->params[i]);
- MEM_VECTOR_CLEAR(self, params);
- if (self->next) /* delete, not unref, types are always copied */
- ast_delete(self->next);
if (self->isconst) {
- switch (self->vtype)
+ switch (self->expression.vtype)
{
- case 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
*/
break;
}
}
+ ast_expression_delete((ast_expression*)self);
mem_d(self);
}
-void ast_value_set_name(ast_value *self, const char *name)
+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)
mem_d((void*)self->name);
self->name = util_strdup(name);
+ 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);
self->left = left;
self->right = right;
+ if (op >= INSTR_EQ_F && op <= INSTR_GT)
+ self->expression.vtype = TYPE_FLOAT;
+ else if (op == INSTR_AND || op == INSTR_OR ||
+ op == INSTR_BITAND || op == INSTR_BITOR)
+ self->expression.vtype = TYPE_FLOAT;
+ else if (op == INSTR_MUL_VF || op == INSTR_MUL_FV)
+ self->expression.vtype = TYPE_VECTOR;
+ else if (op == INSTR_MUL_V)
+ self->expression.vtype = TYPE_FLOAT;
+ else
+ self->expression.vtype = left->expression.vtype;
+
return self;
}
{
ast_unref(self->left);
ast_unref(self->right);
+ ast_expression_delete((ast_expression*)self);
mem_d(self);
}
-ast_store* ast_store_new(lex_ctx_t ctx, int op,
- ast_value *dest, ast_value *source)
+ast_unary* ast_unary_new(lex_ctx ctx, int op,
+ ast_expression *expr)
+{
+ ast_instantiate(ast_unary, ctx, ast_unary_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_unary_codegen);
+
+ self->op = op;
+ self->operand = expr;
+
+ return self;
+}
+
+void ast_unary_delete(ast_unary *self)
+{
+ ast_unref(self->operand);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_return* ast_return_new(lex_ctx ctx, ast_expression *expr)
+{
+ ast_instantiate(ast_return, ctx, ast_return_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_return_codegen);
+
+ self->operand = expr;
+
+ return self;
+}
+
+void ast_return_delete(ast_return *self)
+{
+ ast_unref(self->operand);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_entfield* ast_entfield_new(lex_ctx ctx, ast_expression *entity, ast_expression *field)
+{
+ const ast_expression *outtype;
+
+ ast_instantiate(ast_entfield, ctx, ast_entfield_delete);
+
+ if (field->expression.vtype != TYPE_FIELD) {
+ mem_d(self);
+ return NULL;
+ }
+
+ outtype = field->expression.next;
+ if (!outtype) {
+ mem_d(self);
+ /* Error: field has no type... */
+ return NULL;
+ }
+
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_entfield_codegen);
+
+ self->expression.vtype = outtype->expression.vtype;
+ self->expression.next = ast_type_copy(ctx, outtype->expression.next);
+
+ self->entity = entity;
+ self->field = field;
+
+ return self;
+}
+
+void ast_entfield_delete(ast_entfield *self)
+{
+ ast_unref(self->entity);
+ ast_unref(self->field);
+ 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_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);
+ 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_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);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_loop* ast_loop_new(lex_ctx ctx,
+ ast_expression *initexpr,
+ ast_expression *precond,
+ ast_expression *postcond,
+ ast_expression *increment,
+ ast_expression *body)
+{
+ ast_instantiate(ast_loop, ctx, ast_loop_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_loop_codegen);
+
+ self->initexpr = initexpr;
+ self->precond = precond;
+ self->postcond = postcond;
+ self->increment = increment;
+ self->body = body;
+
+ return self;
+}
+
+void ast_loop_delete(ast_loop *self)
+{
+ if (self->initexpr)
+ ast_unref(self->initexpr);
+ if (self->precond)
+ ast_unref(self->precond);
+ if (self->postcond)
+ ast_unref(self->postcond);
+ if (self->increment)
+ ast_unref(self->increment);
+ if (self->body)
+ ast_unref(self->body);
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_call* ast_call_new(lex_ctx ctx,
+ ast_expression *funcexpr)
+{
+ ast_instantiate(ast_call, ctx, ast_call_delete);
+ ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_call_codegen);
+
+ MEM_VECTOR_INIT(self, params);
+
+ self->func = funcexpr;
+
+ return self;
+}
+MEM_VEC_FUNCTIONS(ast_call, ast_expression*, params)
+
+void ast_call_delete(ast_call *self)
+{
+ size_t i;
+ for (i = 0; i < self->params_count; ++i)
+ ast_unref(self->params[i]);
+ MEM_VECTOR_CLEAR(self, params);
+
+ if (self->func)
+ ast_unref(self->func);
+
+ ast_expression_delete((ast_expression*)self);
+ mem_d(self);
+}
+
+ast_store* ast_store_new(lex_ctx ctx, int op,
+ 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);
{
ast_unref(self->dest);
ast_unref(self->source);
+ ast_expression_delete((ast_expression*)self);
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);
+ ast_expression_delete((ast_expression*)self);
mem_d(self);
}
-ast_function* ast_function_new(lex_ctx_t ctx, const char *name, ast_value *vtype)
+bool ast_block_set_type(ast_block *self, ast_expression *from)
+{
+ if (self->expression.next)
+ ast_delete(self->expression.next);
+ self->expression.vtype = from->expression.vtype;
+ if (from->expression.next) {
+ self->expression.next = ast_type_copy(self->expression.node.context, from->expression.next);
+ if (!self->expression.next)
+ return false;
+ }
+ return true;
+}
+
+ast_function* ast_function_new(lex_ctx ctx, const char *name, ast_value *vtype)
{
ast_instantiate(ast_function, ctx, ast_function_delete);
+ if (!vtype ||
+ vtype->isconst ||
+ vtype->expression.vtype != TYPE_FUNCTION)
+ {
+ mem_d(self);
+ return NULL;
+ }
+
self->vtype = vtype;
self->name = name ? util_strdup(name) : NULL;
MEM_VECTOR_INIT(self, blocks);
+ self->labelcount = 0;
+ self->builtin = 0;
+
+ self->ir_func = NULL;
+ self->curblock = NULL;
+
+ self->breakblock = NULL;
+ self->continueblock = NULL;
+
+ vtype->isconst = true;
+ vtype->constval.vfunc = self;
+
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);
mem_d(self);
}
+static void ast_util_hexitoa(char *buf, size_t size, unsigned int num)
+{
+ unsigned int base = 10;
+#define checknul() do { if (size == 1) { *buf = 0; return; } } while (0)
+#define addch(x) do { *buf++ = (x); --size; checknul(); } while (0)
+ if (size < 1)
+ return;
+ checknul();
+ if (!num)
+ addch('0');
+ else {
+ while (num)
+ {
+ int digit = num % base;
+ num /= base;
+ addch('0' + digit);
+ }
+ }
+
+ *buf = 0;
+#undef addch
+#undef checknul
+}
+
+const char* ast_function_label(ast_function *self, const char *prefix)
+{
+ size_t id = (self->labelcount++);
+ size_t len = strlen(prefix);
+ strncpy(self->labelbuf, prefix, sizeof(self->labelbuf));
+ ast_util_hexitoa(self->labelbuf + len, sizeof(self->labelbuf)-len, id);
+ return self->labelbuf;
+}
+
/*********************************************************************/
-/* AST codegen aprt
+/* AST codegen part
+ * by convention you must never pass NULL to the 'ir_value **out'
+ * parameter. If you really don't care about the output, pass a dummy.
+ * But I can't imagine a pituation where the output is truly unnecessary.
*/
-/* Some dummies so it compiles... */
-bool ast_value_codegen(ast_value *self, ast_function *func, ir_value **out)
+bool ast_value_codegen(ast_value *self, ast_function *func, bool lvalue, ir_value **out)
{
- return false;
+ /* 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) {
+ printf("ast_value used before generated (%s)\n", self->name);
+ return false;
+ }
+ *out = self->ir_v;
+ return true;
}
-bool ast_block_codegen(ast_block *self, ast_function *func, ir_value **out)
+bool ast_global_codegen(ast_value *self, ir_builder *ir)
{
+ ir_value *v = NULL;
+ if (self->isconst && self->expression.vtype == TYPE_FUNCTION)
+ {
+ ir_function *func = ir_builder_create_function(ir, self->name, self->expression.next->expression.vtype);
+ if (!func)
+ return false;
+
+ self->constval.vfunc->ir_func = func;
+ self->ir_v = func->value;
+ /* The function is filled later on ast_function_codegen... */
+ return true;
+ }
+
+ v = ir_builder_create_global(ir, self->name, self->expression.vtype);
+ if (!v) {
+ printf("ir_builder_create_global failed\n");
+ return false;
+ }
+
+ if (self->isconst) {
+ switch (self->expression.vtype)
+ {
+ case TYPE_FLOAT:
+ if (!ir_value_set_float(v, self->constval.vfloat))
+ goto error;
+ break;
+ case TYPE_VECTOR:
+ if (!ir_value_set_vector(v, self->constval.vvec))
+ goto error;
+ break;
+ case TYPE_STRING:
+ if (!ir_value_set_string(v, self->constval.vstring))
+ goto error;
+ break;
+ case TYPE_FUNCTION:
+ printf("global of type function not properly generated\n");
+ goto error;
+ /* Cannot generate an IR value for a function,
+ * need a pointer pointing to a function rather.
+ */
+ default:
+ printf("TODO: global constant type %i\n", self->expression.vtype);
+ break;
+ }
+ }
+
+ /* link us to the ir_value */
+ self->ir_v = v;
+ return true;
+
+error: /* clean up */
+ ir_value_delete(v);
return false;
}
-bool ast_store_codegen(ast_store *self, ast_function *func, ir_value **out)
+bool ast_local_codegen(ast_value *self, ir_function *func, bool param)
{
+ ir_value *v = NULL;
+ if (self->isconst && self->expression.vtype == TYPE_FUNCTION)
+ {
+ /* Do we allow local functions? I think not...
+ * this is NOT a function pointer atm.
+ */
+ return false;
+ }
+
+ v = ir_function_create_local(func, self->name, self->expression.vtype, param);
+ if (!v)
+ return false;
+
+ /* A constant local... hmmm...
+ * I suppose the IR will have to deal with this
+ */
+ if (self->isconst) {
+ switch (self->expression.vtype)
+ {
+ case TYPE_FLOAT:
+ if (!ir_value_set_float(v, self->constval.vfloat))
+ goto error;
+ break;
+ case TYPE_VECTOR:
+ if (!ir_value_set_vector(v, self->constval.vvec))
+ goto error;
+ break;
+ case TYPE_STRING:
+ if (!ir_value_set_string(v, self->constval.vstring))
+ goto error;
+ break;
+ default:
+ printf("TODO: global constant type %i\n", self->expression.vtype);
+ break;
+ }
+ }
+
+ /* link us to the ir_value */
+ self->ir_v = v;
+ return true;
+
+error: /* clean up */
+ ir_value_delete(v);
return false;
}
-bool ast_binary_codegen(ast_binary *self, ast_function *func, ir_value **out)
+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;
+ if (!irf) {
+ printf("ast_function's related ast_value was not generated yet\n");
+ return false;
+ }
+
+ /* fill the parameter list */
+ ec = &self->vtype->expression;
+ for (i = 0; i < ec->params_count; ++i)
+ {
+ if (!ir_function_params_add(irf, ec->params[i]->expression.vtype))
+ return false;
+ if (!self->builtin) {
+ if (!ast_local_codegen(ec->params[i], self->ir_func, true))
+ return false;
+ }
+ }
+
+ if (self->builtin) {
+ irf->builtin = self->builtin;
+ return true;
+ }
+
+ self->curblock = ir_function_create_block(irf, "entry");
+ if (!self->curblock)
+ return false;
+
+ for (i = 0; i < self->blocks_count; ++i) {
+ ast_expression_codegen *gen = self->blocks[i]->expression.codegen;
+ if (!(*gen)((ast_expression*)self->blocks[i], self, false, &dummy))
+ return false;
+ }
+
+ /* TODO: check return types */
+ if (!self->curblock->is_return)
+ {
+ if (!self->vtype->expression.next ||
+ self->vtype->expression.next->expression.vtype == TYPE_VOID)
+ {
+ return ir_block_create_return(self->curblock, NULL);
+ }
+ else
+ {
+ /* error("missing return"); */
+ return false;
+ }
+ }
+ return true;
+}
+
+/* Note, you will not see ast_block_codegen generate ir_blocks.
+ * To the AST and the IR, blocks are 2 different things.
+ * In the AST it represents a block of code, usually enclosed in
+ * curly braces {...}.
+ * While in the IR it represents a block in terms of control-flow.
+ */
+bool ast_block_codegen(ast_block *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ size_t i;
+
+ /* We don't use this
+ * Note: an ast-representation using the comma-operator
+ * of the form: (a, b, c) = x should not assign to c...
+ */
+ (void)lvalue;
+
+ /* output is NULL at first, we'll have each expression
+ * assign to out output, thus, a comma-operator represention
+ * using an ast_block will return the last generated value,
+ * so: (b, c) + a executed both b and c, and returns c,
+ * which is then added to a.
+ */
+ *out = NULL;
+
+ /* generate locals */
+ for (i = 0; i < self->locals_count; ++i)
+ {
+ if (!ast_local_codegen(self->locals[i], func->ir_func, false))
+ return false;
+ }
+
+ for (i = 0; i < self->exprs_count; ++i)
+ {
+ ast_expression_codegen *gen = self->exprs[i]->expression.codegen;
+ if (!(*gen)(self->exprs[i], func, false, out))
+ return false;
+ }
+
+ return true;
+}
+
+bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_value **out)
{
+ ast_expression_codegen *cgen;
+ ir_value *left, *right;
+
+ cgen = self->dest->expression.codegen;
+ /* lvalue! */
+ if (!(*cgen)((ast_expression*)(self->dest), func, true, &left))
+ return false;
+
+ cgen = self->source->expression.codegen;
+ /* rvalue! */
+ if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
+ return false;
+
+ if (!ir_block_create_store_op(func->curblock, self->op, left, right))
+ return false;
+
+ /* Theoretically, an assinment returns its left side as an
+ * lvalue, if we don't need an lvalue though, we return
+ * the right side as an rvalue, otherwise we have to
+ * somehow know whether or not we need to dereference the pointer
+ * on the left side - that is: OP_LOAD if it was an address.
+ * Also: in original QC we cannot OP_LOADP *anyway*.
+ */
+ *out = (lvalue ? left : right);
+
+ return true;
+}
+
+bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *left, *right;
+
+ /* In the context of a binary operation, we can disregard
+ * the lvalue flag.
+ */
+ (void)lvalue;
+
+ cgen = self->left->expression.codegen;
+ /* lvalue! */
+ if (!(*cgen)((ast_expression*)(self->left), func, false, &left))
+ return false;
+
+ cgen = self->right->expression.codegen;
+ /* rvalue! */
+ if (!(*cgen)((ast_expression*)(self->right), func, false, &right))
+ return false;
+
+ *out = ir_block_create_binop(func->curblock, ast_function_label(func, "bin"),
+ self->op, left, right);
+ if (!*out)
+ return false;
+
+ return true;
+}
+
+bool ast_unary_codegen(ast_unary *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *operand;
+
+ /* In the context of a unary operation, we can disregard
+ * the lvalue flag.
+ */
+ (void)lvalue;
+
+ cgen = self->operand->expression.codegen;
+ /* lvalue! */
+ if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
+ return false;
+
+ *out = ir_block_create_unary(func->curblock, ast_function_label(func, "unary"),
+ self->op, operand);
+ if (!*out)
+ return false;
+
+ return true;
+}
+
+bool ast_return_codegen(ast_return *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *operand;
+
+ /* In the context of a return operation, we can disregard
+ * the lvalue flag.
+ */
+ (void)lvalue;
+
+ cgen = self->operand->expression.codegen;
+ /* lvalue! */
+ if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
+ return false;
+
+ if (!ir_block_create_return(func->curblock, operand))
+ return false;
+
+ return true;
+}
+
+bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value *ent, *field;
+
+ /* This function needs to take the 'lvalue' flag into account!
+ * As lvalue we provide a field-pointer, as rvalue we provide the
+ * value in a temp.
+ */
+
+ cgen = self->entity->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->entity), func, false, &ent))
+ return false;
+
+ cgen = self->field->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->field), func, false, &field))
+ return false;
+
+ if (lvalue) {
+ /* address! */
+ *out = ir_block_create_fieldaddress(func->curblock, ast_function_label(func, "efa"),
+ ent, field);
+ } else {
+ *out = ir_block_create_load_from_ent(func->curblock, ast_function_label(func, "efv"),
+ ent, field, self->expression.vtype);
+ }
+ if (!*out)
+ return false;
+
+ /* Hm that should be it... */
+ return true;
+}
+
+bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+
+ ir_value *condval;
+ ir_value *dummy;
+
+ ir_block *cond = func->curblock;
+ ir_block *ontrue;
+ ir_block *onfalse;
+ ir_block *merge;
+
+ /* We don't output any value, thus also don't care about r/lvalue */
+ (void)out;
+ (void)lvalue;
+
+ /* generate the condition */
+ func->curblock = cond;
+ cgen = self->cond->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
+ return false;
+
+ /* on-true path */
+
+ if (self->on_true) {
+ /* create on-true block */
+ ontrue = ir_function_create_block(func->ir_func, ast_function_label(func, "ontrue"));
+ if (!ontrue)
+ return false;
+
+ /* enter the block */
+ func->curblock = ontrue;
+
+ /* generate */
+ cgen = self->on_true->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->on_true), func, false, &dummy))
+ return false;
+ } else
+ ontrue = NULL;
+
+ /* on-false path */
+ if (self->on_false) {
+ /* create on-false block */
+ onfalse = ir_function_create_block(func->ir_func, ast_function_label(func, "onfalse"));
+ if (!onfalse)
+ return false;
+
+ /* enter the block */
+ func->curblock = onfalse;
+
+ /* generate */
+ cgen = self->on_false->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->on_false), func, false, &dummy))
+ return false;
+ } else
+ onfalse = NULL;
+
+ /* Merge block were they all merge in to */
+ merge = ir_function_create_block(func->ir_func, ast_function_label(func, "endif"));
+ if (!merge)
+ return false;
+
+ /* add jumps ot the merge block */
+ if (ontrue && !ir_block_create_jump(ontrue, merge))
+ return false;
+ if (onfalse && !ir_block_create_jump(onfalse, merge))
+ return false;
+
+ /* we create the if here, that way all blocks are ordered :)
+ */
+ if (!ir_block_create_if(cond, condval,
+ (ontrue ? ontrue : merge),
+ (onfalse ? onfalse : merge)))
+ {
+ return false;
+ }
+
+ /* Now enter the merge block */
+ func->curblock = merge;
+
+ return true;
+}
+
+bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+
+ ir_value *condval;
+ ir_value *trueval, *falseval;
+ ir_instr *phi;
+
+ ir_block *cond = func->curblock;
+ ir_block *ontrue;
+ ir_block *onfalse;
+ ir_block *merge;
+
+ /* In theory it shouldn't be possible to pass through a node twice, but
+ * in case we add any kind of optimization pass for the AST itself, it
+ * may still happen, thus we remember a created ir_value and simply return one
+ * if it already exists.
+ */
+ if (self->phi_out) {
+ *out = self->phi_out;
+ return true;
+ }
+
+ /* Ternary can never create an lvalue... */
+ if (lvalue)
+ return false;
+
+ /* In the following, contraty to ast_ifthen, we assume both paths exist. */
+
+ /* generate the condition */
+ func->curblock = cond;
+ cgen = self->cond->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
+ return false;
+
+ /* create on-true block */
+ ontrue = ir_function_create_block(func->ir_func, ast_function_label(func, "tern_T"));
+ if (!ontrue)
+ return false;
+ else
+ {
+ /* enter the block */
+ func->curblock = ontrue;
+
+ /* generate */
+ cgen = self->on_true->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->on_true), func, false, &trueval))
+ return false;
+ }
+
+ /* create on-false block */
+ onfalse = ir_function_create_block(func->ir_func, ast_function_label(func, "tern_F"));
+ if (!onfalse)
+ return false;
+ else
+ {
+ /* enter the block */
+ func->curblock = onfalse;
+
+ /* generate */
+ cgen = self->on_false->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->on_false), func, false, &falseval))
+ return false;
+ }
+
+ /* create merge block */
+ merge = ir_function_create_block(func->ir_func, ast_function_label(func, "tern_out"));
+ if (!merge)
+ return false;
+ /* jump to merge block */
+ if (!ir_block_create_jump(ontrue, merge))
+ return false;
+ if (!ir_block_create_jump(onfalse, merge))
+ return false;
+
+ /* create if instruction */
+ if (!ir_block_create_if(cond, condval, ontrue, onfalse))
+ return false;
+
+ /* Now enter the merge block */
+ func->curblock = merge;
+
+ /* Here, now, we need a PHI node
+ * but first some sanity checking...
+ */
+ if (trueval->vtype != falseval->vtype) {
+ /* error("ternary with different types on the two sides"); */
+ return false;
+ }
+
+ /* create PHI */
+ phi = ir_block_create_phi(merge, ast_function_label(func, "phi"), trueval->vtype);
+ if (!phi ||
+ !ir_phi_add(phi, ontrue, trueval) ||
+ !ir_phi_add(phi, onfalse, falseval))
+ {
+ return false;
+ }
+
+ self->phi_out = ir_phi_value(phi);
+ *out = self->phi_out;
+
+ return true;
+}
+
+bool ast_loop_codegen(ast_loop *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+
+ ir_value *dummy = NULL;
+ ir_value *precond = NULL;
+ ir_value *postcond = NULL;
+
+ /* Since we insert some jumps "late" so we have blocks
+ * ordered "nicely", we need to keep track of the actual end-blocks
+ * of expressions to add the jumps to.
+ */
+ ir_block *bbody = NULL, *end_bbody = NULL;
+ ir_block *bprecond = NULL, *end_bprecond = NULL;
+ ir_block *bpostcond = NULL, *end_bpostcond = NULL;
+ ir_block *bincrement = NULL, *end_bincrement = NULL;
+ ir_block *bout = NULL, *bin = NULL;
+
+ /* let's at least move the outgoing block to the end */
+ size_t bout_id;
+
+ /* 'break' and 'continue' need to be able to find the right blocks */
+ ir_block *bcontinue = NULL;
+ ir_block *bbreak = NULL;
+
+ ir_block *old_bcontinue = NULL;
+ ir_block *old_bbreak = NULL;
+
+ ir_block *tmpblock = NULL;
+
+ (void)lvalue;
+ (void)out;
+
+ /* NOTE:
+ * Should we ever need some kind of block ordering, better make this function
+ * move blocks around than write a block ordering algorithm later... after all
+ * the ast and ir should work together, not against each other.
+ */
+
+ /* initexpr doesn't get its own block, it's pointless, it could create more blocks
+ * anyway if for example it contains a ternary.
+ */
+ if (self->initexpr)
+ {
+ cgen = self->initexpr->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->initexpr), func, false, &dummy))
+ return false;
+ }
+
+ /* Store the block from which we enter this chaos */
+ bin = func->curblock;
+
+ /* The pre-loop condition needs its own block since we
+ * need to be able to jump to the start of that expression.
+ */
+ if (self->precond)
+ {
+ bprecond = ir_function_create_block(func->ir_func, ast_function_label(func, "pre_loop_cond"));
+ if (!bprecond)
+ return false;
+
+ /* the pre-loop-condition the least important place to 'continue' at */
+ bcontinue = bprecond;
+
+ /* enter */
+ func->curblock = bprecond;
+
+ /* generate */
+ cgen = self->precond->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->precond), func, false, &precond))
+ return false;
+
+ end_bprecond = func->curblock;
+ } else {
+ bprecond = end_bprecond = NULL;
+ }
+
+ /* Now the next blocks won't be ordered nicely, but we need to
+ * generate them this early for 'break' and 'continue'.
+ */
+ if (self->increment) {
+ bincrement = ir_function_create_block(func->ir_func, ast_function_label(func, "loop_increment"));
+ if (!bincrement)
+ return false;
+ bcontinue = bincrement; /* increment comes before the pre-loop-condition */
+ } else {
+ bincrement = end_bincrement = NULL;
+ }
+
+ if (self->postcond) {
+ bpostcond = ir_function_create_block(func->ir_func, ast_function_label(func, "post_loop_cond"));
+ if (!bpostcond)
+ return false;
+ bcontinue = bpostcond; /* postcond comes before the increment */
+ } else {
+ bpostcond = end_bpostcond = NULL;
+ }
+
+ bout_id = func->ir_func->blocks_count;
+ bout = ir_function_create_block(func->ir_func, ast_function_label(func, "after_loop"));
+ if (!bout)
+ return false;
+ bbreak = bout;
+
+ /* The loop body... */
+ if (self->body)
+ {
+ bbody = ir_function_create_block(func->ir_func, ast_function_label(func, "loop_body"));
+ if (!bbody)
+ return false;
+
+ /* enter */
+ func->curblock = bbody;
+
+ old_bbreak = func->breakblock;
+ old_bcontinue = func->continueblock;
+ func->breakblock = bbreak;
+ func->continueblock = bcontinue;
+
+ /* generate */
+ cgen = self->body->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->body), func, false, &dummy))
+ return false;
+
+ end_bbody = func->curblock;
+ func->breakblock = old_bbreak;
+ func->continueblock = old_bcontinue;
+ }
+
+ /* post-loop-condition */
+ if (self->postcond)
+ {
+ /* enter */
+ func->curblock = bpostcond;
+
+ /* generate */
+ cgen = self->postcond->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->postcond), func, false, &postcond))
+ return false;
+
+ end_bpostcond = func->curblock;
+ }
+
+ /* The incrementor */
+ if (self->increment)
+ {
+ /* enter */
+ func->curblock = bincrement;
+
+ /* generate */
+ cgen = self->increment->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->increment), func, false, &dummy))
+ return false;
+
+ end_bincrement = func->curblock;
+ }
+
+ /* In any case now, we continue from the outgoing block */
+ func->curblock = bout;
+
+ /* Now all blocks are in place */
+ /* From 'bin' we jump to whatever comes first */
+ if (bprecond) tmpblock = bprecond;
+ else if (bbody) tmpblock = bbody;
+ else if (bpostcond) tmpblock = bpostcond;
+ else tmpblock = bout;
+ if (!ir_block_create_jump(bin, tmpblock))
+ return false;
+
+ /* From precond */
+ if (bprecond)
+ {
+ ir_block *ontrue, *onfalse;
+ if (bbody) ontrue = bbody;
+ else if (bincrement) ontrue = bincrement;
+ else if (bpostcond) ontrue = bpostcond;
+ else ontrue = bprecond;
+ onfalse = bout;
+ if (!ir_block_create_if(end_bprecond, precond, ontrue, onfalse))
+ return false;
+ }
+
+ /* from body */
+ if (bbody)
+ {
+ if (bincrement) tmpblock = bincrement;
+ else if (bpostcond) tmpblock = bpostcond;
+ else if (bprecond) tmpblock = bprecond;
+ else tmpblock = bout;
+ if (!ir_block_create_jump(end_bbody, tmpblock))
+ return false;
+ }
+
+ /* from increment */
+ if (bincrement)
+ {
+ if (bpostcond) tmpblock = bpostcond;
+ else if (bprecond) tmpblock = bprecond;
+ else if (bbody) tmpblock = bbody;
+ else tmpblock = bout;
+ if (!ir_block_create_jump(end_bincrement, tmpblock))
+ return false;
+ }
+
+ /* from postcond */
+ if (bpostcond)
+ {
+ ir_block *ontrue, *onfalse;
+ if (bprecond) ontrue = bprecond;
+ else if (bbody) ontrue = bbody;
+ else if (bincrement) ontrue = bincrement;
+ else ontrue = bpostcond;
+ onfalse = bout;
+ if (!ir_block_create_if(end_bpostcond, postcond, ontrue, onfalse))
+ return false;
+ }
+
+ /* Move 'bout' to the end */
+ if (!ir_function_blocks_remove(func->ir_func, bout_id) ||
+ !ir_function_blocks_add(func->ir_func, bout))
+ {
+ ir_block_delete(bout);
+ return false;
+ }
+
+ return true;
+}
+
+bool ast_call_codegen(ast_call *self, ast_function *func, bool lvalue, ir_value **out)
+{
+ ast_expression_codegen *cgen;
+ ir_value_vector params;
+ ir_instr *callinstr;
+ size_t i;
+
+ ir_value *funval = NULL;
+
+ /* return values are never rvalues */
+ (void)lvalue;
+
+ cgen = self->func->expression.codegen;
+ if (!(*cgen)((ast_expression*)(self->func), func, false, &funval))
+ return false;
+ if (!funval)
+ return false;
+
+ MEM_VECTOR_INIT(¶ms, v);
+
+ /* parameters */
+ for (i = 0; i < self->params_count; ++i)
+ {
+ ir_value *param;
+ ast_expression *expr = self->params[i];
+
+ cgen = expr->expression.codegen;
+ if (!(*cgen)(expr, func, false, ¶m))
+ goto error;
+ if (!param)
+ goto error;
+ if (!ir_value_vector_v_add(¶ms, param))
+ goto error;
+ }
+
+ callinstr = ir_block_create_call(func->curblock, ast_function_label(func, "call"), funval);
+ if (!callinstr)
+ goto error;
+
+ for (i = 0; i < params.v_count; ++i) {
+ if (!ir_call_param(callinstr, params.v[i]))
+ goto error;
+ }
+
+ *out = ir_call_value(callinstr);
+
+ MEM_VECTOR_CLEAR(¶ms, v);
+ return true;
+error:
+ MEM_VECTOR_CLEAR(¶ms, v);
return false;
}
projects / xonotic / gmqcc.git / blobdiff