mirror of
https://git.code.sf.net/p/quake/quakeforge
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8099c4cf8e
It's nowhere near complete, but unary and binary expressions that are marked as constant will not be subject to constant folding. This is necessary for proper support of specialization constants.
117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/*
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glsl-declaration.c
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GLSL declaration handling
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Copyright (C) 2024 Bill Currie <bill@taniwha.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "QF/alloc.h"
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#include "QF/hash.h"
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#include "QF/va.h"
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#include "tools/qfcc/include/attribute.h"
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#include "tools/qfcc/include/def.h"
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#include "tools/qfcc/include/diagnostic.h"
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#include "tools/qfcc/include/glsl-lang.h"
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#include "tools/qfcc/include/shared.h"
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#include "tools/qfcc/include/strpool.h"
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#include "tools/qfcc/include/symtab.h"
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#include "tools/qfcc/include/type.h"
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void
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glsl_parse_declaration (specifier_t spec, symbol_t *sym, const type_t *array,
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const expr_t *init, symtab_t *symtab)
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{
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if (sym->type) {
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internal_error (0, "unexected typed symbol");
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}
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if (array) {
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spec.type = append_type (array, spec.type);
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spec.type = find_type (spec.type);
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}
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auto attributes = glsl_optimize_attributes (spec.attributes);
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if (sym && sym->sy_type == sy_expr) {
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auto id_list = sym->expr;
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if (id_list->type != ex_list) {
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internal_error (id_list, "not a list");
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}
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for (auto id = id_list->list.head; id; id = id->next) {
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if (id->expr->type != ex_symbol) {
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internal_error (id_list, "not a symbol");
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}
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spec.sym = id->expr->symbol;
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spec.sym = declare_symbol (spec, init, symtab);
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glsl_apply_attributes (attributes, spec);
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}
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} else {
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spec.sym = sym;
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if (spec.sym) {
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if (spec.is_const && !init) {
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error (0, "uninitialized const %s", sym->name);
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init = new_zero_expr (spec.type);
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}
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if (spec.is_const && init->type != ex_compound) {
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auto type = get_type (init);
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if (type != spec.type && type_assignable (spec.type, type)) {
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if (!init->implicit && !type_promotes (spec.type, type)) {
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warning (init, "initialization of %s with %s"
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" (use a cast)\n)",
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get_type_string (spec.type),
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get_type_string (type));
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}
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init = cast_expr (spec.type, init);
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}
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if (get_type (init) != spec.type) {
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error (init, "type mismatch in initializer");
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init = new_zero_expr (spec.type);
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}
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if (!is_constexpr (init)) {
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error (init, "non-constant initializer");
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init = new_zero_expr (spec.type);
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}
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sym->type = spec.type;
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sym->sy_type = sy_expr;
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sym->expr = init;
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auto s = symtab_lookup (symtab, sym->name);
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if (s && s->table == symtab) {
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error (0, "%s redeclared", sym->name);
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}
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symtab_addsymbol (symtab, sym);
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} else {
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spec.sym = declare_symbol (spec, init, symtab);
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}
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}
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glsl_apply_attributes (attributes, spec);
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}
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}
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void
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glsl_declare_field (specifier_t spec, symtab_t *symtab)
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{
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auto attributes = glsl_optimize_attributes (spec.attributes);
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spec.sym = declare_field (spec, symtab);
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glsl_apply_attributes (attributes, spec);
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}
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