mirror of https://gitlab.freedesktop.org/mesa/mesa
1186 lines
36 KiB
C++
1186 lines
36 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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/**
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* \file ast_to_hir.c
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* Convert abstract syntax to to high-level intermediate reprensentation (HIR).
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*
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* During the conversion to HIR, the majority of the symantic checking is
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* preformed on the program. This includes:
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*
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* * Symbol table management
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* * Type checking
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* * Function binding
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*
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* The majority of this work could be done during parsing, and the parser could
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* probably generate HIR directly. However, this results in frequent changes
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* to the parser code. Since we do not assume that every system this complier
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* is built on will have Flex and Bison installed, we have to store the code
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* generated by these tools in our version control system. In other parts of
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* the system we've seen problems where a parser was changed but the generated
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* code was not committed, merge conflicts where created because two developers
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* had slightly different versions of Bison installed, etc.
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*
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* I have also noticed that running Bison generated parsers in GDB is very
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* irritating. When you get a segfault on '$$ = $1->foo', you can't very
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* well 'print $1' in GDB.
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*
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* As a result, my preference is to put as little C code as possible in the
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* parser (and lexer) sources.
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*/
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#include <stdio.h>
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#include "main/imports.h"
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#include "glsl_symbol_table.h"
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#include "glsl_parser_extras.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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void
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_mesa_ast_to_hir(exec_list *instructions, struct _mesa_glsl_parse_state *state)
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{
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struct simple_node *ptr;
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_mesa_glsl_initialize_variables(instructions, state);
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_mesa_glsl_initialize_constructors(instructions, state);
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state->current_function = NULL;
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foreach (ptr, & state->translation_unit) {
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((ast_node *)ptr)->hir(instructions, state);
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}
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}
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static const struct glsl_type *
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arithmetic_result_type(const struct glsl_type *type_a,
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const struct glsl_type *type_b,
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bool multiply,
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struct _mesa_glsl_parse_state *state)
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{
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/* From GLSL 1.50 spec, page 56:
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*
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* "The arithmetic binary operators add (+), subtract (-),
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* multiply (*), and divide (/) operate on integer and
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* floating-point scalars, vectors, and matrices."
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*/
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if (!type_a->is_numeric() || !type_b->is_numeric()) {
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return glsl_type::error_type;
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}
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/* "If one operand is floating-point based and the other is
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* not, then the conversions from Section 4.1.10 "Implicit
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* Conversions" are applied to the non-floating-point-based operand."
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*
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* This conversion was added in GLSL 1.20. If the compilation mode is
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* GLSL 1.10, the conversion is skipped.
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*/
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if (state->language_version >= 120) {
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if ((type_a->base_type == GLSL_TYPE_FLOAT)
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&& (type_b->base_type != GLSL_TYPE_FLOAT)) {
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} else if ((type_a->base_type != GLSL_TYPE_FLOAT)
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&& (type_b->base_type == GLSL_TYPE_FLOAT)) {
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}
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}
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/* "If the operands are integer types, they must both be signed or
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* both be unsigned."
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*
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* From this rule and the preceeding conversion it can be inferred that
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* both types must be GLSL_TYPE_FLOAT, or GLSL_TYPE_UINT, or GLSL_TYPE_INT.
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* The is_numeric check above already filtered out the case where either
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* type is not one of these, so now the base types need only be tested for
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* equality.
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*/
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if (type_a->base_type != type_b->base_type) {
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return glsl_type::error_type;
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}
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/* "All arithmetic binary operators result in the same fundamental type
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* (signed integer, unsigned integer, or floating-point) as the
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* operands they operate on, after operand type conversion. After
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* conversion, the following cases are valid
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*
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* * The two operands are scalars. In this case the operation is
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* applied, resulting in a scalar."
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*/
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if (type_a->is_scalar() && type_b->is_scalar())
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return type_a;
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/* "* One operand is a scalar, and the other is a vector or matrix.
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* In this case, the scalar operation is applied independently to each
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* component of the vector or matrix, resulting in the same size
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* vector or matrix."
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*/
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if (type_a->is_scalar()) {
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if (!type_b->is_scalar())
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return type_b;
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} else if (type_b->is_scalar()) {
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return type_a;
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}
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/* All of the combinations of <scalar, scalar>, <vector, scalar>,
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* <scalar, vector>, <scalar, matrix>, and <matrix, scalar> have been
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* handled.
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*/
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assert(!type_a->is_scalar());
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assert(!type_b->is_scalar());
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/* "* The two operands are vectors of the same size. In this case, the
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* operation is done component-wise resulting in the same size
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* vector."
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*/
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if (type_a->is_vector() && type_b->is_vector()) {
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return (type_a == type_b) ? type_a : glsl_type::error_type;
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}
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/* All of the combinations of <scalar, scalar>, <vector, scalar>,
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* <scalar, vector>, <scalar, matrix>, <matrix, scalar>, and
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* <vector, vector> have been handled. At least one of the operands must
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* be matrix. Further, since there are no integer matrix types, the base
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* type of both operands must be float.
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*/
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assert(type_a->is_matrix() || type_b->is_matrix());
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assert(type_a->base_type == GLSL_TYPE_FLOAT);
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assert(type_b->base_type == GLSL_TYPE_FLOAT);
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/* "* The operator is add (+), subtract (-), or divide (/), and the
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* operands are matrices with the same number of rows and the same
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* number of columns. In this case, the operation is done component-
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* wise resulting in the same size matrix."
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* * The operator is multiply (*), where both operands are matrices or
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* one operand is a vector and the other a matrix. A right vector
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* operand is treated as a column vector and a left vector operand as a
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* row vector. In all these cases, it is required that the number of
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* columns of the left operand is equal to the number of rows of the
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* right operand. Then, the multiply (*) operation does a linear
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* algebraic multiply, yielding an object that has the same number of
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* rows as the left operand and the same number of columns as the right
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* operand. Section 5.10 "Vector and Matrix Operations" explains in
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* more detail how vectors and matrices are operated on."
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*/
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if (! multiply) {
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return (type_a == type_b) ? type_a : glsl_type::error_type;
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} else {
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if (type_a->is_matrix() && type_b->is_matrix()) {
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/* Matrix multiply. The columns of A must match the rows of B. Given
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* the other previously tested constraints, this means the vector type
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* of a row from A must be the same as the vector type of a column from
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* B.
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*/
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if (type_a->row_type() == type_b->column_type()) {
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/* The resulting matrix has the number of columns of matrix B and
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* the number of rows of matrix A. We get the row count of A by
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* looking at the size of a vector that makes up a column. The
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* transpose (size of a row) is done for B.
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*/
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return
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glsl_type::get_instance(type_a->base_type,
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type_a->column_type()->vector_elements,
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type_b->row_type()->vector_elements);
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}
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} else if (type_a->is_matrix()) {
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/* A is a matrix and B is a column vector. Columns of A must match
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* rows of B. Given the other previously tested constraints, this
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* means the vector type of a row from A must be the same as the
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* vector the type of B.
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*/
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if (type_a->row_type() == type_b)
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return type_b;
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} else {
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assert(type_b->is_matrix());
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/* A is a row vector and B is a matrix. Columns of A must match rows
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* of B. Given the other previously tested constraints, this means
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* the type of A must be the same as the vector type of a column from
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* B.
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*/
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if (type_a == type_b->column_type())
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return type_a;
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}
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}
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/* "All other cases are illegal."
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*/
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return glsl_type::error_type;
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}
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static const struct glsl_type *
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unary_arithmetic_result_type(const struct glsl_type *type)
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{
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/* From GLSL 1.50 spec, page 57:
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*
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* "The arithmetic unary operators negate (-), post- and pre-increment
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* and decrement (-- and ++) operate on integer or floating-point
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* values (including vectors and matrices). All unary operators work
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* component-wise on their operands. These result with the same type
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* they operated on."
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*/
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if (!type->is_numeric())
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return glsl_type::error_type;
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return type;
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}
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static const struct glsl_type *
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modulus_result_type(const struct glsl_type *type_a,
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const struct glsl_type *type_b)
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{
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/* From GLSL 1.50 spec, page 56:
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* "The operator modulus (%) operates on signed or unsigned integers or
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* integer vectors. The operand types must both be signed or both be
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* unsigned."
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*/
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if (!type_a->is_integer() || !type_b->is_integer()
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|| (type_a->base_type != type_b->base_type)) {
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return glsl_type::error_type;
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}
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/* "The operands cannot be vectors of differing size. If one operand is
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* a scalar and the other vector, then the scalar is applied component-
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* wise to the vector, resulting in the same type as the vector. If both
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* are vectors of the same size, the result is computed component-wise."
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*/
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if (type_a->is_vector()) {
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if (!type_b->is_vector()
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|| (type_a->vector_elements == type_b->vector_elements))
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return type_a;
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} else
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return type_b;
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/* "The operator modulus (%) is not defined for any other data types
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* (non-integer types)."
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*/
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return glsl_type::error_type;
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}
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static const struct glsl_type *
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relational_result_type(const struct glsl_type *type_a,
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const struct glsl_type *type_b,
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struct _mesa_glsl_parse_state *state)
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{
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/* From GLSL 1.50 spec, page 56:
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* "The relational operators greater than (>), less than (<), greater
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* than or equal (>=), and less than or equal (<=) operate only on
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* scalar integer and scalar floating-point expressions."
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*/
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if (!type_a->is_numeric()
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|| !type_b->is_numeric()
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|| !type_a->is_scalar()
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|| !type_b->is_scalar())
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return glsl_type::error_type;
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/* "Either the operands' types must match, or the conversions from
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* Section 4.1.10 "Implicit Conversions" will be applied to the integer
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* operand, after which the types must match."
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*
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* This conversion was added in GLSL 1.20. If the compilation mode is
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* GLSL 1.10, the conversion is skipped.
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*/
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if (state->language_version >= 120) {
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if ((type_a->base_type == GLSL_TYPE_FLOAT)
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&& (type_b->base_type != GLSL_TYPE_FLOAT)) {
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/* FINISHME: Generate the implicit type conversion. */
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} else if ((type_a->base_type != GLSL_TYPE_FLOAT)
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&& (type_b->base_type == GLSL_TYPE_FLOAT)) {
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/* FINISHME: Generate the implicit type conversion. */
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}
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}
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if (type_a->base_type != type_b->base_type)
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return glsl_type::error_type;
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/* "The result is scalar Boolean."
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*/
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return glsl_type::bool_type;
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}
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/**
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* Validates that a value can be assigned to a location with a specified type
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*
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* Validates that \c rhs can be assigned to some location. If the types are
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* not an exact match but an automatic conversion is possible, \c rhs will be
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* converted.
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*
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* \return
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* \c NULL if \c rhs cannot be assigned to a location with type \c lhs_type.
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* Otherwise the actual RHS to be assigned will be returned. This may be
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* \c rhs, or it may be \c rhs after some type conversion.
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*
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* \note
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* In addition to being used for assignments, this function is used to
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* type-check return values.
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*/
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ir_rvalue *
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validate_assignment(const glsl_type *lhs_type, ir_rvalue *rhs)
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{
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const glsl_type *const rhs_type = rhs->type;
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/* If there is already some error in the RHS, just return it. Anything
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* else will lead to an avalanche of error message back to the user.
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*/
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if (rhs_type->is_error())
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return rhs;
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/* FINISHME: For GLSL 1.10, check that the types are not arrays. */
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/* If the types are identical, the assignment can trivially proceed.
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*/
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if (rhs_type == lhs_type)
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return rhs;
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/* FINISHME: Check for and apply automatic conversions. */
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return NULL;
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}
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ir_rvalue *
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ast_node::hir(exec_list *instructions,
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struct _mesa_glsl_parse_state *state)
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{
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(void) instructions;
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(void) state;
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return NULL;
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}
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ir_rvalue *
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ast_expression::hir(exec_list *instructions,
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struct _mesa_glsl_parse_state *state)
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{
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static const int operations[AST_NUM_OPERATORS] = {
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-1, /* ast_assign doesn't convert to ir_expression. */
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-1, /* ast_plus doesn't convert to ir_expression. */
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ir_unop_neg,
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ir_binop_add,
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ir_binop_sub,
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ir_binop_mul,
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ir_binop_div,
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ir_binop_mod,
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ir_binop_lshift,
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ir_binop_rshift,
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ir_binop_less,
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ir_binop_greater,
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ir_binop_lequal,
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ir_binop_gequal,
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ir_binop_equal,
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ir_binop_nequal,
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ir_binop_bit_and,
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ir_binop_bit_xor,
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ir_binop_bit_or,
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ir_unop_bit_not,
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ir_binop_logic_and,
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ir_binop_logic_xor,
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ir_binop_logic_or,
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ir_unop_logic_not,
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/* Note: The following block of expression types actually convert
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* to multiple IR instructions.
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*/
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ir_binop_mul, /* ast_mul_assign */
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ir_binop_div, /* ast_div_assign */
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ir_binop_mod, /* ast_mod_assign */
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ir_binop_add, /* ast_add_assign */
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ir_binop_sub, /* ast_sub_assign */
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ir_binop_lshift, /* ast_ls_assign */
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ir_binop_rshift, /* ast_rs_assign */
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ir_binop_bit_and, /* ast_and_assign */
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ir_binop_bit_xor, /* ast_xor_assign */
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ir_binop_bit_or, /* ast_or_assign */
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-1, /* ast_conditional doesn't convert to ir_expression. */
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-1, /* ast_pre_inc doesn't convert to ir_expression. */
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-1, /* ast_pre_dec doesn't convert to ir_expression. */
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-1, /* ast_post_inc doesn't convert to ir_expression. */
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-1, /* ast_post_dec doesn't convert to ir_expression. */
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-1, /* ast_field_selection doesn't conv to ir_expression. */
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-1, /* ast_array_index doesn't convert to ir_expression. */
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-1, /* ast_function_call doesn't conv to ir_expression. */
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-1, /* ast_identifier doesn't convert to ir_expression. */
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-1, /* ast_int_constant doesn't convert to ir_expression. */
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-1, /* ast_uint_constant doesn't conv to ir_expression. */
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-1, /* ast_float_constant doesn't conv to ir_expression. */
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-1, /* ast_bool_constant doesn't conv to ir_expression. */
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-1, /* ast_sequence doesn't convert to ir_expression. */
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};
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ir_rvalue *result = NULL;
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ir_rvalue *op[2];
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struct simple_node op_list;
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const struct glsl_type *type = glsl_type::error_type;
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bool error_emitted = false;
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YYLTYPE loc;
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loc = this->get_location();
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make_empty_list(& op_list);
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switch (this->oper) {
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case ast_assign: {
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op[0] = this->subexpressions[0]->hir(instructions, state);
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op[1] = this->subexpressions[1]->hir(instructions, state);
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error_emitted = op[0]->type->is_error() || op[1]->type->is_error();
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type = op[0]->type;
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if (!error_emitted) {
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YYLTYPE loc;
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/* FINISHME: This does not handle 'foo.bar.a.b.c[5].d = 5' */
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if (!op[0]->is_lvalue()) {
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_mesa_glsl_error(& loc, state, "non-lvalue in assignment");
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error_emitted = true;
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type = glsl_type::error_type;
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}
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}
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ir_instruction *rhs = validate_assignment(op[0]->type, op[1]);
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if (rhs == NULL) {
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type = glsl_type::error_type;
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rhs = op[1];
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}
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ir_instruction *tmp = new ir_assignment(op[0], op[1], NULL);
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instructions->push_tail(tmp);
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result = op[0];
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break;
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}
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case ast_plus:
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op[0] = this->subexpressions[0]->hir(instructions, state);
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error_emitted = op[0]->type->is_error();
|
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if (type->is_error())
|
|
op[0]->type = type;
|
|
|
|
result = op[0];
|
|
break;
|
|
|
|
case ast_neg:
|
|
op[0] = this->subexpressions[0]->hir(instructions, state);
|
|
|
|
type = unary_arithmetic_result_type(op[0]->type);
|
|
|
|
error_emitted = op[0]->type->is_error();
|
|
|
|
result = new ir_expression(operations[this->oper], type,
|
|
op[0], NULL);
|
|
break;
|
|
|
|
case ast_add:
|
|
case ast_sub:
|
|
case ast_mul:
|
|
case ast_div:
|
|
op[0] = this->subexpressions[0]->hir(instructions, state);
|
|
op[1] = this->subexpressions[1]->hir(instructions, state);
|
|
|
|
type = arithmetic_result_type(op[0]->type, op[1]->type,
|
|
(this->oper == ast_mul),
|
|
state);
|
|
|
|
result = new ir_expression(operations[this->oper], type,
|
|
op[0], op[1]);
|
|
break;
|
|
|
|
case ast_mod:
|
|
op[0] = this->subexpressions[0]->hir(instructions, state);
|
|
op[1] = this->subexpressions[1]->hir(instructions, state);
|
|
|
|
error_emitted = op[0]->type->is_error() || op[1]->type->is_error();
|
|
|
|
type = modulus_result_type(op[0]->type, op[1]->type);
|
|
|
|
assert(operations[this->oper] == ir_binop_mod);
|
|
|
|
result = new ir_expression(operations[this->oper], type,
|
|
op[0], op[1]);
|
|
break;
|
|
|
|
case ast_lshift:
|
|
case ast_rshift:
|
|
/* FINISHME: Implement bit-shift operators. */
|
|
break;
|
|
|
|
case ast_less:
|
|
case ast_greater:
|
|
case ast_lequal:
|
|
case ast_gequal:
|
|
op[0] = this->subexpressions[0]->hir(instructions, state);
|
|
op[1] = this->subexpressions[1]->hir(instructions, state);
|
|
|
|
error_emitted = op[0]->type->is_error() || op[1]->type->is_error();
|
|
|
|
type = relational_result_type(op[0]->type, op[1]->type, state);
|
|
|
|
/* The relational operators must either generate an error or result
|
|
* in a scalar boolean. See page 57 of the GLSL 1.50 spec.
|
|
*/
|
|
assert(type->is_error()
|
|
|| ((type->base_type == GLSL_TYPE_BOOL)
|
|
&& type->is_scalar()));
|
|
|
|
result = new ir_expression(operations[this->oper], type,
|
|
op[0], op[1]);
|
|
break;
|
|
|
|
case ast_nequal:
|
|
case ast_equal:
|
|
/* FINISHME: Implement equality operators. */
|
|
break;
|
|
|
|
case ast_bit_and:
|
|
case ast_bit_xor:
|
|
case ast_bit_or:
|
|
case ast_bit_not:
|
|
/* FINISHME: Implement bit-wise operators. */
|
|
break;
|
|
|
|
case ast_logic_and:
|
|
case ast_logic_xor:
|
|
case ast_logic_or:
|
|
case ast_logic_not:
|
|
/* FINISHME: Implement logical operators. */
|
|
break;
|
|
|
|
case ast_mul_assign:
|
|
case ast_div_assign:
|
|
case ast_add_assign:
|
|
case ast_sub_assign: {
|
|
op[0] = this->subexpressions[0]->hir(instructions, state);
|
|
op[1] = this->subexpressions[1]->hir(instructions, state);
|
|
|
|
error_emitted = op[0]->type->is_error() || op[1]->type->is_error();
|
|
|
|
type = arithmetic_result_type(op[0]->type, op[1]->type,
|
|
(this->oper == ast_mul_assign),
|
|
state);
|
|
|
|
ir_rvalue *temp_rhs = new ir_expression(operations[this->oper], type,
|
|
op[0], op[1]);
|
|
|
|
/* FINISHME: This is copied from ast_assign above. It should
|
|
* FINISHME: probably be consolidated.
|
|
*/
|
|
error_emitted = op[0]->type->is_error() || temp_rhs->type->is_error();
|
|
|
|
type = op[0]->type;
|
|
if (!error_emitted) {
|
|
YYLTYPE loc;
|
|
|
|
if (!op[0]->is_lvalue()) {
|
|
_mesa_glsl_error(& loc, state, "non-lvalue in assignment");
|
|
error_emitted = true;
|
|
type = glsl_type::error_type;
|
|
}
|
|
}
|
|
|
|
ir_rvalue *rhs = validate_assignment(op[0]->type, temp_rhs);
|
|
if (rhs == NULL) {
|
|
type = glsl_type::error_type;
|
|
rhs = temp_rhs;
|
|
}
|
|
|
|
ir_instruction *tmp = new ir_assignment(op[0], rhs, NULL);
|
|
instructions->push_tail(tmp);
|
|
|
|
/* GLSL 1.10 does not allow array assignment. However, we don't have to
|
|
* explicitly test for this because none of the binary expression
|
|
* operators allow array operands either.
|
|
*/
|
|
|
|
result = op[0];
|
|
break;
|
|
}
|
|
|
|
case ast_mod_assign:
|
|
|
|
case ast_ls_assign:
|
|
case ast_rs_assign:
|
|
|
|
case ast_and_assign:
|
|
case ast_xor_assign:
|
|
case ast_or_assign:
|
|
|
|
case ast_conditional:
|
|
|
|
case ast_pre_inc:
|
|
case ast_pre_dec:
|
|
|
|
case ast_post_inc:
|
|
case ast_post_dec:
|
|
break;
|
|
|
|
case ast_field_selection:
|
|
result = _mesa_ast_field_selection_to_hir(this, instructions, state);
|
|
type = result->type;
|
|
break;
|
|
|
|
case ast_array_index:
|
|
break;
|
|
|
|
case ast_function_call:
|
|
/* Should *NEVER* get here. ast_function_call should always be handled
|
|
* by ast_function_expression::hir.
|
|
*/
|
|
assert(0);
|
|
break;
|
|
|
|
case ast_identifier: {
|
|
/* ast_identifier can appear several places in a full abstract syntax
|
|
* tree. This particular use must be at location specified in the grammar
|
|
* as 'variable_identifier'.
|
|
*/
|
|
ir_variable *var =
|
|
state->symbols->get_variable(this->primary_expression.identifier);
|
|
|
|
result = new ir_dereference(var);
|
|
|
|
if (var != NULL) {
|
|
type = result->type;
|
|
} else {
|
|
_mesa_glsl_error(& loc, state, "`%s' undeclared",
|
|
this->primary_expression.identifier);
|
|
|
|
error_emitted = true;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case ast_int_constant:
|
|
type = glsl_type::int_type;
|
|
result = new ir_constant(type, & this->primary_expression);
|
|
break;
|
|
|
|
case ast_uint_constant:
|
|
type = glsl_type::uint_type;
|
|
result = new ir_constant(type, & this->primary_expression);
|
|
break;
|
|
|
|
case ast_float_constant:
|
|
type = glsl_type::float_type;
|
|
result = new ir_constant(type, & this->primary_expression);
|
|
break;
|
|
|
|
case ast_bool_constant:
|
|
type = glsl_type::bool_type;
|
|
result = new ir_constant(type, & this->primary_expression);
|
|
break;
|
|
|
|
case ast_sequence: {
|
|
struct simple_node *ptr;
|
|
|
|
/* It should not be possible to generate a sequence in the AST without
|
|
* any expressions in it.
|
|
*/
|
|
assert(!is_empty_list(&this->expressions));
|
|
|
|
/* The r-value of a sequence is the last expression in the sequence. If
|
|
* the other expressions in the sequence do not have side-effects (and
|
|
* therefore add instructions to the instruction list), they get dropped
|
|
* on the floor.
|
|
*/
|
|
foreach (ptr, &this->expressions)
|
|
result = ((ast_node *)ptr)->hir(instructions, state);
|
|
|
|
type = result->type;
|
|
|
|
/* Any errors should have already been emitted in the loop above.
|
|
*/
|
|
error_emitted = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (type->is_error() && !error_emitted)
|
|
_mesa_glsl_error(& loc, state, "type mismatch");
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
ir_rvalue *
|
|
ast_expression_statement::hir(exec_list *instructions,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
/* It is possible to have expression statements that don't have an
|
|
* expression. This is the solitary semicolon:
|
|
*
|
|
* for (i = 0; i < 5; i++)
|
|
* ;
|
|
*
|
|
* In this case the expression will be NULL. Test for NULL and don't do
|
|
* anything in that case.
|
|
*/
|
|
if (expression != NULL)
|
|
expression->hir(instructions, state);
|
|
|
|
/* Statements do not have r-values.
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
|
|
ir_rvalue *
|
|
ast_compound_statement::hir(exec_list *instructions,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
struct simple_node *ptr;
|
|
|
|
|
|
if (new_scope)
|
|
state->symbols->push_scope();
|
|
|
|
foreach (ptr, &statements)
|
|
((ast_node *)ptr)->hir(instructions, state);
|
|
|
|
if (new_scope)
|
|
state->symbols->pop_scope();
|
|
|
|
/* Compound statements do not have r-values.
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static const struct glsl_type *
|
|
type_specifier_to_glsl_type(const struct ast_type_specifier *spec,
|
|
const char **name,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
struct glsl_type *type;
|
|
|
|
if (spec->type_specifier == ast_struct) {
|
|
/* FINISHME: Handle annonymous structures. */
|
|
type = NULL;
|
|
} else {
|
|
type = state->symbols->get_type(spec->type_name);
|
|
*name = spec->type_name;
|
|
|
|
/* FINISHME: Handle array declarations. Note that this requires complete
|
|
* FINISHME: handling of constant expressions.
|
|
*/
|
|
}
|
|
|
|
return type;
|
|
}
|
|
|
|
|
|
static void
|
|
apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual,
|
|
struct ir_variable *var,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
if (qual->invariant)
|
|
var->invariant = 1;
|
|
|
|
/* FINISHME: Mark 'in' variables at global scope as read-only. */
|
|
if (qual->constant || qual->attribute || qual->uniform
|
|
|| (qual->varying && (state->target == fragment_shader)))
|
|
var->read_only = 1;
|
|
|
|
if (qual->centroid)
|
|
var->centroid = 1;
|
|
|
|
if (qual->in && qual->out)
|
|
var->mode = ir_var_inout;
|
|
else if (qual->attribute || qual->in
|
|
|| (qual->varying && (state->target == fragment_shader)))
|
|
var->mode = ir_var_in;
|
|
else if (qual->out || (qual->varying && (state->target == vertex_shader)))
|
|
var->mode = ir_var_out;
|
|
else if (qual->uniform)
|
|
var->mode = ir_var_uniform;
|
|
else
|
|
var->mode = ir_var_auto;
|
|
|
|
if (qual->flat)
|
|
var->interpolation = ir_var_flat;
|
|
else if (qual->noperspective)
|
|
var->interpolation = ir_var_noperspective;
|
|
else
|
|
var->interpolation = ir_var_smooth;
|
|
}
|
|
|
|
|
|
ir_rvalue *
|
|
ast_declarator_list::hir(exec_list *instructions,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
struct simple_node *ptr;
|
|
const struct glsl_type *decl_type;
|
|
const char *type_name = NULL;
|
|
|
|
|
|
/* FINISHME: Handle vertex shader "invariant" declarations that do not
|
|
* FINISHME: include a type. These re-declare built-in variables to be
|
|
* FINISHME: invariant.
|
|
*/
|
|
|
|
decl_type = type_specifier_to_glsl_type(this->type->specifier,
|
|
& type_name, state);
|
|
|
|
foreach (ptr, &this->declarations) {
|
|
struct ast_declaration *const decl = (struct ast_declaration * )ptr;
|
|
const struct glsl_type *var_type;
|
|
struct ir_variable *var;
|
|
|
|
|
|
/* FINISHME: Emit a warning if a variable declaration shadows a
|
|
* FINISHME: declaration at a higher scope.
|
|
*/
|
|
|
|
if ((decl_type == NULL) || decl_type->is_void()) {
|
|
YYLTYPE loc;
|
|
|
|
loc = this->get_location();
|
|
if (type_name != NULL) {
|
|
_mesa_glsl_error(& loc, state,
|
|
"invalid type `%s' in declaration of `%s'",
|
|
type_name, decl->identifier);
|
|
} else {
|
|
_mesa_glsl_error(& loc, state,
|
|
"invalid type in declaration of `%s'",
|
|
decl->identifier);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (decl->is_array) {
|
|
/* FINISHME: Handle array declarations. Note that this requires
|
|
* FINISHME: complete handling of constant expressions.
|
|
*/
|
|
|
|
/* FINISHME: Reject delcarations of multidimensional arrays. */
|
|
} else {
|
|
var_type = decl_type;
|
|
}
|
|
|
|
var = new ir_variable(var_type, decl->identifier);
|
|
|
|
/* FINISHME: Variables that are attribute, uniform, varying, in, or
|
|
* FINISHME: out varibles must be declared either at global scope or
|
|
* FINISHME: in a parameter list (in and out only).
|
|
*/
|
|
|
|
apply_type_qualifier_to_variable(& this->type->qualifier, var, state);
|
|
|
|
/* Attempt to add the variable to the symbol table. If this fails, it
|
|
* means the variable has already been declared at this scope.
|
|
*/
|
|
if (state->symbols->name_declared_this_scope(decl->identifier)) {
|
|
YYLTYPE loc = this->get_location();
|
|
|
|
_mesa_glsl_error(& loc, state, "`%s' redeclared",
|
|
decl->identifier);
|
|
continue;
|
|
}
|
|
|
|
const bool added_variable =
|
|
state->symbols->add_variable(decl->identifier, var);
|
|
assert(added_variable);
|
|
|
|
instructions->push_tail(var);
|
|
|
|
/* FINISHME: Process the declaration initializer. */
|
|
}
|
|
|
|
/* Variable declarations do not have r-values.
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
|
|
ir_rvalue *
|
|
ast_parameter_declarator::hir(exec_list *instructions,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
const struct glsl_type *type;
|
|
const char *name = NULL;
|
|
|
|
|
|
type = type_specifier_to_glsl_type(this->type->specifier, & name, state);
|
|
|
|
if (type == NULL) {
|
|
YYLTYPE loc = this->get_location();
|
|
if (name != NULL) {
|
|
_mesa_glsl_error(& loc, state,
|
|
"invalid type `%s' in declaration of `%s'",
|
|
name, this->identifier);
|
|
} else {
|
|
_mesa_glsl_error(& loc, state,
|
|
"invalid type in declaration of `%s'",
|
|
this->identifier);
|
|
}
|
|
|
|
type = glsl_type::error_type;
|
|
}
|
|
|
|
ir_variable *var = new ir_variable(type, this->identifier);
|
|
|
|
/* FINISHME: Handle array declarations. Note that this requires
|
|
* FINISHME: complete handling of constant expressions.
|
|
*/
|
|
|
|
/* Apply any specified qualifiers to the parameter declaration. Note that
|
|
* for function parameters the default mode is 'in'.
|
|
*/
|
|
apply_type_qualifier_to_variable(& this->type->qualifier, var, state);
|
|
if (var->mode == ir_var_auto)
|
|
var->mode = ir_var_in;
|
|
|
|
instructions->push_tail(var);
|
|
|
|
/* Parameter declarations do not have r-values.
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static void
|
|
ast_function_parameters_to_hir(struct simple_node *ast_parameters,
|
|
exec_list *ir_parameters,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
struct simple_node *ptr;
|
|
|
|
foreach (ptr, ast_parameters) {
|
|
((ast_node *)ptr)->hir(ir_parameters, state);
|
|
}
|
|
}
|
|
|
|
|
|
static bool
|
|
parameter_lists_match(exec_list *list_a, exec_list *list_b)
|
|
{
|
|
exec_list_iterator iter_a = list_a->iterator();
|
|
exec_list_iterator iter_b = list_b->iterator();
|
|
|
|
while (iter_a.has_next()) {
|
|
/* If all of the parameters from the other parameter list have been
|
|
* exhausted, the lists have different length and, by definition,
|
|
* do not match.
|
|
*/
|
|
if (!iter_b.has_next())
|
|
return false;
|
|
|
|
/* If the types of the parameters do not match, the parameters lists
|
|
* are different.
|
|
*/
|
|
/* FINISHME */
|
|
|
|
|
|
iter_a.next();
|
|
iter_b.next();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
ir_rvalue *
|
|
ast_function_definition::hir(exec_list *instructions,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
ir_label *label;
|
|
ir_function_signature *signature = NULL;
|
|
ir_function *f = NULL;
|
|
exec_list parameters;
|
|
|
|
|
|
/* Convert the list of function parameters to HIR now so that they can be
|
|
* used below to compare this function's signature with previously seen
|
|
* signatures for functions with the same name.
|
|
*/
|
|
ast_function_parameters_to_hir(& this->prototype->parameters, & parameters,
|
|
state);
|
|
|
|
const char *return_type_name;
|
|
const glsl_type *return_type =
|
|
type_specifier_to_glsl_type(this->prototype->return_type->specifier,
|
|
& return_type_name, state);
|
|
|
|
assert(return_type != NULL);
|
|
|
|
|
|
/* Verify that this function's signature either doesn't match a previously
|
|
* seen signature for a function with the same name, or, if a match is found,
|
|
* that the previously seen signature does not have an associated definition.
|
|
*/
|
|
const char *const name = this->prototype->identifier;
|
|
f = state->symbols->get_function(name);
|
|
if (f != NULL) {
|
|
foreach_iter(exec_list_iterator, iter, f->signatures) {
|
|
signature = (struct ir_function_signature *) iter.get();
|
|
|
|
/* Compare the parameter list of the function being defined to the
|
|
* existing function. If the parameter lists match, then the return
|
|
* type must also match and the existing function must not have a
|
|
* definition.
|
|
*/
|
|
if (parameter_lists_match(& parameters, & signature->parameters)) {
|
|
/* FINISHME: Compare return types. */
|
|
|
|
if (signature->definition != NULL) {
|
|
YYLTYPE loc = this->get_location();
|
|
|
|
_mesa_glsl_error(& loc, state, "function `%s' redefined", name);
|
|
signature = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
signature = NULL;
|
|
}
|
|
|
|
} else if (state->symbols->name_declared_this_scope(name)) {
|
|
/* This function name shadows a non-function use of the same name.
|
|
*/
|
|
YYLTYPE loc = this->get_location();
|
|
|
|
_mesa_glsl_error(& loc, state, "function name `%s' conflicts with "
|
|
"non-function", name);
|
|
signature = NULL;
|
|
} else {
|
|
f = new ir_function(name);
|
|
state->symbols->add_function(f->name, f);
|
|
}
|
|
|
|
|
|
/* Finish storing the information about this new function in its signature.
|
|
*/
|
|
if (signature == NULL) {
|
|
signature = new ir_function_signature(return_type);
|
|
f->signatures.push_tail(signature);
|
|
} else {
|
|
/* Destroy all of the previous parameter information. The previous
|
|
* parameter information comes from the function prototype, and it can
|
|
* either include invalid parameter names or may not have names at all.
|
|
*/
|
|
foreach_iter(exec_list_iterator, iter, signature->parameters) {
|
|
assert(((ir_instruction *) iter.get())->as_variable() != NULL);
|
|
|
|
iter.remove();
|
|
delete iter.get();
|
|
}
|
|
}
|
|
|
|
|
|
assert(state->current_function == NULL);
|
|
state->current_function = signature;
|
|
|
|
ast_function_parameters_to_hir(& this->prototype->parameters,
|
|
& signature->parameters,
|
|
state);
|
|
/* FINISHME: Set signature->return_type */
|
|
|
|
label = new ir_label(name);
|
|
if (signature->definition == NULL) {
|
|
signature->definition = label;
|
|
}
|
|
instructions->push_tail(label);
|
|
|
|
/* Add the function parameters to the symbol table. During this step the
|
|
* parameter declarations are also moved from the temporary "parameters" list
|
|
* to the instruction list. There are other more efficient ways to do this,
|
|
* but they involve ugly linked-list gymnastics.
|
|
*/
|
|
state->symbols->push_scope();
|
|
foreach_iter(exec_list_iterator, iter, parameters) {
|
|
ir_variable *const var = (ir_variable *) iter.get();
|
|
|
|
assert(((ir_instruction *) var)->as_variable() != NULL);
|
|
|
|
iter.remove();
|
|
instructions->push_tail(var);
|
|
|
|
/* The only way a parameter would "exist" is if two parameters have
|
|
* the same name.
|
|
*/
|
|
if (state->symbols->name_declared_this_scope(var->name)) {
|
|
YYLTYPE loc = this->get_location();
|
|
|
|
_mesa_glsl_error(& loc, state, "parameter `%s' redeclared", var->name);
|
|
} else {
|
|
state->symbols->add_variable(var->name, var);
|
|
}
|
|
}
|
|
|
|
/* Convert the body of the function to HIR, and append the resulting
|
|
* instructions to the list that currently consists of the function label
|
|
* and the function parameters.
|
|
*/
|
|
this->body->hir(instructions, state);
|
|
|
|
state->symbols->pop_scope();
|
|
|
|
assert(state->current_function == signature);
|
|
state->current_function = NULL;
|
|
|
|
/* Function definitions do not have r-values.
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
|
|
ir_rvalue *
|
|
ast_jump_statement::hir(exec_list *instructions,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
|
|
if (mode == ast_return) {
|
|
ir_return *inst;
|
|
|
|
if (opt_return_value) {
|
|
/* FINISHME: Make sure the enclosing function has a non-void return
|
|
* FINISHME: type.
|
|
*/
|
|
|
|
ir_expression *const ret = (ir_expression *)
|
|
opt_return_value->hir(instructions, state);
|
|
assert(ret != NULL);
|
|
|
|
/* FINISHME: Make sure the type of the return value matches the return
|
|
* FINISHME: type of the enclosing function.
|
|
*/
|
|
|
|
inst = new ir_return(ret);
|
|
} else {
|
|
/* FINISHME: Make sure the enclosing function has a void return type.
|
|
*/
|
|
inst = new ir_return;
|
|
}
|
|
|
|
instructions->push_tail(inst);
|
|
}
|
|
|
|
/* Jump instructions do not have r-values.
|
|
*/
|
|
return NULL;
|
|
}
|