132 lines
4.6 KiB
C++
132 lines
4.6 KiB
C++
/*
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* Copyright © 2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <cstdio>
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#include "glsl_symbol_table.h"
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#include "ast.h"
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#include "glsl_types.h"
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#include "ir.h"
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static ir_rvalue *
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match_function_by_name(exec_list *instructions, const char *name,
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YYLTYPE *loc, simple_node *parameters,
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struct _mesa_glsl_parse_state *state)
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{
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ir_function *f = state->symbols->get_function(name);
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if (f == NULL) {
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_mesa_glsl_error(loc, state, "function `%s' undeclared", name);
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return ir_call::get_error_instruction();
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}
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/* Once we've determined that the function being called might exist,
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* process the parameters.
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*/
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exec_list actual_parameters;
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simple_node *const first = parameters;
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if (first != NULL) {
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simple_node *ptr = first;
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do {
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ir_instruction *const result =
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((ast_node *) ptr)->hir(instructions, state);
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ptr = ptr->next;
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actual_parameters.push_tail(result);
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} while (ptr != first);
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}
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/* After processing the function's actual parameters, try to find an
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* overload of the function that matches.
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*/
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const ir_function_signature *sig =
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f->matching_signature(& actual_parameters);
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if (sig != NULL) {
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/* FINISHME: The list of actual parameters needs to be modified to
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* FINISHME: include any necessary conversions.
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*/
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return new ir_call(sig, & actual_parameters);
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} else {
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/* FINISHME: Log a better error message here. G++ will show the types
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* FINISHME: of the actual parameters and the set of candidate
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* FINISHME: functions. A different error should also be logged when
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* FINISHME: multiple functions match.
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*/
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_mesa_glsl_error(loc, state, "no matching function for call to `%s'",
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name);
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return ir_call::get_error_instruction();
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}
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}
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ir_rvalue *
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ast_function_expression::hir(exec_list *instructions,
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struct _mesa_glsl_parse_state *state)
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{
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/* There are three sorts of function calls.
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*
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* 1. contstructors - The first subexpression is an ast_type_specifier.
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* 2. methods - Only the .length() method of array types.
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* 3. functions - Calls to regular old functions.
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*
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* Method calls are actually detected when the ast_field_selection
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* expression is handled.
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*/
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if (is_constructor()) {
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const ast_type_specifier *type = (ast_type_specifier *) subexpressions[0];
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YYLTYPE loc = type->get_location();
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const glsl_type *const constructor_type =
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state->symbols->get_type(type->type_name);
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/* Constructors for samplers are illegal.
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*/
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if (constructor_type->is_sampler()) {
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_mesa_glsl_error(& loc, state, "cannot construct sampler type `%s'",
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constructor_type->name);
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return ir_call::get_error_instruction();
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}
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/* There are two kinds of constructor call. Constructors for built-in
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* language types, such as mat4 and vec2, are free form. The only
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* requirement is that the parameters must provide enough values of the
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* correct scalar type. Constructors for arrays and structures must
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* have the exact number of parameters with matching types in the
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* correct order. These constructors follow essentially the same type
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* matching rules as functions.
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*/
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return ir_call::get_error_instruction();
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} else {
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const ast_expression *id = subexpressions[0];
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YYLTYPE loc = id->get_location();
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return match_function_by_name(instructions,
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id->primary_expression.identifier, & loc,
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subexpressions[1], state);
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}
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return ir_call::get_error_instruction();
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}
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