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mesa/src/glsl/glsl_parser_extras.cpp
Paul Berry 5d0fd3270f glsl: Add GLSL version query functions. 
With the advent of GLSL 3.00 ES, the version checks we perform in the
GLSL compiler (to determine which language features are present) will
become more complicated.  To reduce the complexity, this patch adds
functions check_version() and is_version() to _mesa_glsl_parse_state.
These functions take two version numbers: a desktop GLSL version and a
GLSL ES version, and return a boolean indicating whether the GLSL
version being compiled is at least the required version.  So, for
example, is_version(130, 300) returns true if the GLSL version being
compiled is at least desktop GLSL 1.30 or GLSL 3.00.

The check_version() function additionally produces an error message if
the version check fails, informing the user of which GLSL version(s)
support the given feature.

[v2, idr]: Add PRINTFLIKE annotation to the new method.  The numbering of th
parameters is correct because GCC is silly.

[v3, idr]: Fix copy-and-paste error in the comment before
_mesa_glsl_parse_state::is_version.  Noticed by Ken.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Acked-by: Carl Worth <cworth@cworth.org>
2012-12-06 12:13:21 -08:00

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/*
* Copyright © 2008, 2009 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
extern "C" {
#include "main/core.h" /* for struct gl_context */
#include "main/context.h"
}
#include "ralloc.h"
#include "ast.h"
#include "glsl_parser_extras.h"
#include "glsl_parser.h"
#include "ir_optimization.h"
#include "loop_analysis.h"
/**
* Format a short human-readable description of the given GLSL version.
*/
const char *
glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
{
return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
version / 100, version % 100);
}
_mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
GLenum target, void *mem_ctx)
: ctx(_ctx)
{
switch (target) {
case GL_VERTEX_SHADER: this->target = vertex_shader; break;
case GL_FRAGMENT_SHADER: this->target = fragment_shader; break;
case GL_GEOMETRY_SHADER: this->target = geometry_shader; break;
}
this->scanner = NULL;
this->translation_unit.make_empty();
this->symbols = new(mem_ctx) glsl_symbol_table;
this->info_log = ralloc_strdup(mem_ctx, "");
this->error = false;
this->loop_nesting_ast = NULL;
this->switch_state.switch_nesting_ast = NULL;
this->num_builtins_to_link = 0;
/* Set default language version and extensions */
this->language_version = 110;
this->es_shader = false;
this->ARB_texture_rectangle_enable = true;
/* OpenGL ES 2.0 has different defaults from desktop GL. */
if (ctx->API == API_OPENGLES2) {
this->language_version = 100;
this->es_shader = true;
this->ARB_texture_rectangle_enable = false;
}
this->extensions = &ctx->Extensions;
this->Const.MaxLights = ctx->Const.MaxLights;
this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
this->Const.MaxVertexAttribs = ctx->Const.VertexProgram.MaxAttribs;
this->Const.MaxVertexUniformComponents = ctx->Const.VertexProgram.MaxUniformComponents;
this->Const.MaxVaryingFloats = ctx->Const.MaxVarying * 4;
this->Const.MaxVertexTextureImageUnits = ctx->Const.MaxVertexTextureImageUnits;
this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
this->Const.MaxTextureImageUnits = ctx->Const.MaxTextureImageUnits;
this->Const.MaxFragmentUniformComponents = ctx->Const.FragmentProgram.MaxUniformComponents;
this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
const unsigned lowest_version =
(ctx->API == API_OPENGLES2) || ctx->Extensions.ARB_ES2_compatibility
? 100 : 110;
const unsigned highest_version =
_mesa_is_desktop_gl(ctx) ? ctx->Const.GLSLVersion : 100;
char *supported = ralloc_strdup(this, "");
for (unsigned ver = lowest_version; ver <= highest_version; ver += 10) {
const char *const prefix = (ver == lowest_version)
? ""
: ((ver == highest_version) ? ", and " : ", ");
ralloc_asprintf_append(& supported, "%s%d.%02d%s",
prefix,
ver / 100, ver % 100,
(ver == 100) ? " ES" : "");
}
this->supported_version_string = supported;
if (ctx->Const.ForceGLSLExtensionsWarn)
_mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
this->default_uniform_qualifier = new(this) ast_type_qualifier();
this->default_uniform_qualifier->flags.q.shared = 1;
this->default_uniform_qualifier->flags.q.column_major = 1;
}
/**
* Determine whether the current GLSL version is sufficiently high to support
* a certain feature, and generate an error message if it isn't.
*
* \param required_glsl_version and \c required_glsl_es_version are
* interpreted as they are in _mesa_glsl_parse_state::is_version().
*
* \param locp is the parser location where the error should be reported.
*
* \param fmt (and additional arguments) constitute a printf-style error
* message to report if the version check fails. Information about the
* current and required GLSL versions will be appended. So, for example, if
* the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
* "foo unsupported") is called, the error message will be "foo unsupported in
* GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
*/
bool
_mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
unsigned required_glsl_es_version,
YYLTYPE *locp, const char *fmt, ...)
{
if (this->is_version(required_glsl_version, required_glsl_es_version))
return true;
va_list args;
va_start(args, fmt);
char *problem = ralloc_vasprintf(ctx, fmt, args);
va_end(args);
const char *glsl_version_string
= glsl_compute_version_string(ctx, false, required_glsl_version);
const char *glsl_es_version_string
= glsl_compute_version_string(ctx, true, required_glsl_es_version);
const char *requirement_string = "";
if (required_glsl_version && required_glsl_es_version) {
requirement_string = ralloc_asprintf(ctx, " (%s or %s required)",
glsl_version_string,
glsl_es_version_string);
} else if (required_glsl_version) {
requirement_string = ralloc_asprintf(ctx, " (%s required)",
glsl_version_string);
} else if (required_glsl_es_version) {
requirement_string = ralloc_asprintf(ctx, " (%s required)",
glsl_es_version_string);
}
_mesa_glsl_error(locp, this, "%s in %s%s.",
problem, this->get_version_string(),
requirement_string);
return false;
}
const char *
_mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target)
{
switch (target) {
case vertex_shader: return "vertex";
case fragment_shader: return "fragment";
case geometry_shader: return "geometry";
}
assert(!"Should not get here.");
return "unknown";
}
/* This helper function will append the given message to the shader's
info log and report it via GL_ARB_debug_output. Per that extension,
'type' is one of the enum values classifying the message, and
'id' is the implementation-defined ID of the given message. */
static void
_mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
GLenum type, GLuint id, const char *fmt, va_list ap)
{
bool error = (type == GL_DEBUG_TYPE_ERROR_ARB);
assert(state->info_log != NULL);
/* Get the offset that the new message will be written to. */
int msg_offset = strlen(state->info_log);
ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
locp->source,
locp->first_line,
locp->first_column,
error ? "error" : "warning");
ralloc_vasprintf_append(&state->info_log, fmt, ap);
const char *const msg = &state->info_log[msg_offset];
struct gl_context *ctx = state->ctx;
/* Report the error via GL_ARB_debug_output. */
if (error)
_mesa_shader_debug(ctx, type, id, msg, strlen(msg));
ralloc_strcat(&state->info_log, "\n");
}
void
_mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
const char *fmt, ...)
{
va_list ap;
GLenum type = GL_DEBUG_TYPE_ERROR_ARB;
state->error = true;
va_start(ap, fmt);
_mesa_glsl_msg(locp, state, type, SHADER_ERROR_UNKNOWN, fmt, ap);
va_end(ap);
}
void
_mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
const char *fmt, ...)
{
va_list ap;
GLenum type = GL_DEBUG_TYPE_OTHER_ARB;
va_start(ap, fmt);
_mesa_glsl_msg(locp, state, type, 0, fmt, ap);
va_end(ap);
}
/**
* Enum representing the possible behaviors that can be specified in
* an #extension directive.
*/
enum ext_behavior {
extension_disable,
extension_enable,
extension_require,
extension_warn
};
/**
* Element type for _mesa_glsl_supported_extensions
*/
struct _mesa_glsl_extension {
/**
* Name of the extension when referred to in a GLSL extension
* statement
*/
const char *name;
/** True if this extension is available to vertex shaders */
bool avail_in_VS;
/** True if this extension is available to geometry shaders */
bool avail_in_GS;
/** True if this extension is available to fragment shaders */
bool avail_in_FS;
/** True if this extension is available to desktop GL shaders */
bool avail_in_GL;
/** True if this extension is available to GLES shaders */
bool avail_in_ES;
/**
* Flag in the gl_extensions struct indicating whether this
* extension is supported by the driver, or
* &gl_extensions::dummy_true if supported by all drivers.
*
* Note: the type (GLboolean gl_extensions::*) is a "pointer to
* member" type, the type-safe alternative to the "offsetof" macro.
* In a nutshell:
*
* - foo bar::* p declares p to be an "offset" to a field of type
* foo that exists within struct bar
* - &bar::baz computes the "offset" of field baz within struct bar
* - x.*p accesses the field of x that exists at "offset" p
* - x->*p is equivalent to (*x).*p
*/
const GLboolean gl_extensions::* supported_flag;
/**
* Flag in the _mesa_glsl_parse_state struct that should be set
* when this extension is enabled.
*
* See note in _mesa_glsl_extension::supported_flag about "pointer
* to member" types.
*/
bool _mesa_glsl_parse_state::* enable_flag;
/**
* Flag in the _mesa_glsl_parse_state struct that should be set
* when the shader requests "warn" behavior for this extension.
*
* See note in _mesa_glsl_extension::supported_flag about "pointer
* to member" types.
*/
bool _mesa_glsl_parse_state::* warn_flag;
bool compatible_with_state(const _mesa_glsl_parse_state *state) const;
void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
};
#define EXT(NAME, VS, GS, FS, GL, ES, SUPPORTED_FLAG) \
{ "GL_" #NAME, VS, GS, FS, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
&_mesa_glsl_parse_state::NAME##_enable, \
&_mesa_glsl_parse_state::NAME##_warn }
/**
* Table of extensions that can be enabled/disabled within a shader,
* and the conditions under which they are supported.
*/
static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
/* target availability API availability */
/* name VS GS FS GL ES supported flag */
EXT(ARB_conservative_depth, false, false, true, true, false, ARB_conservative_depth),
EXT(ARB_draw_buffers, false, false, true, true, false, dummy_true),
EXT(ARB_draw_instanced, true, false, false, true, false, ARB_draw_instanced),
EXT(ARB_explicit_attrib_location, true, false, true, true, false, ARB_explicit_attrib_location),
EXT(ARB_fragment_coord_conventions, true, false, true, true, false, ARB_fragment_coord_conventions),
EXT(ARB_texture_rectangle, true, false, true, true, false, dummy_true),
EXT(EXT_texture_array, true, false, true, true, false, EXT_texture_array),
EXT(ARB_shader_texture_lod, true, false, true, true, false, ARB_shader_texture_lod),
EXT(ARB_shader_stencil_export, false, false, true, true, false, ARB_shader_stencil_export),
EXT(AMD_conservative_depth, false, false, true, true, false, ARB_conservative_depth),
EXT(AMD_shader_stencil_export, false, false, true, true, false, ARB_shader_stencil_export),
EXT(OES_texture_3D, true, false, true, false, true, EXT_texture3D),
EXT(OES_EGL_image_external, true, false, true, false, true, OES_EGL_image_external),
EXT(ARB_shader_bit_encoding, true, true, true, true, false, ARB_shader_bit_encoding),
EXT(ARB_uniform_buffer_object, true, false, true, true, false, ARB_uniform_buffer_object),
EXT(OES_standard_derivatives, false, false, true, false, true, OES_standard_derivatives),
EXT(ARB_texture_cube_map_array, true, false, true, true, false, ARB_texture_cube_map_array),
};
#undef EXT
/**
* Determine whether a given extension is compatible with the target,
* API, and extension information in the current parser state.
*/
bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state *
state) const
{
/* Check that this extension matches the type of shader we are
* compiling to.
*/
switch (state->target) {
case vertex_shader:
if (!this->avail_in_VS) {
return false;
}
break;
case geometry_shader:
if (!this->avail_in_GS) {
return false;
}
break;
case fragment_shader:
if (!this->avail_in_FS) {
return false;
}
break;
default:
assert (!"Unrecognized shader target");
return false;
}
/* Check that this extension matches whether we are compiling
* for desktop GL or GLES.
*/
if (state->es_shader) {
if (!this->avail_in_ES) return false;
} else {
if (!this->avail_in_GL) return false;
}
/* Check that this extension is supported by the OpenGL
* implementation.
*
* Note: the ->* operator indexes into state->extensions by the
* offset this->supported_flag. See
* _mesa_glsl_extension::supported_flag for more info.
*/
return state->extensions->*(this->supported_flag);
}
/**
* Set the appropriate flags in the parser state to establish the
* given behavior for this extension.
*/
void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
ext_behavior behavior) const
{
/* Note: the ->* operator indexes into state by the
* offsets this->enable_flag and this->warn_flag. See
* _mesa_glsl_extension::supported_flag for more info.
*/
state->*(this->enable_flag) = (behavior != extension_disable);
state->*(this->warn_flag) = (behavior == extension_warn);
}
/**
* Find an extension by name in _mesa_glsl_supported_extensions. If
* the name is not found, return NULL.
*/
static const _mesa_glsl_extension *find_extension(const char *name)
{
for (unsigned i = 0; i < Elements(_mesa_glsl_supported_extensions); ++i) {
if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
return &_mesa_glsl_supported_extensions[i];
}
}
return NULL;
}
bool
_mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
const char *behavior_string, YYLTYPE *behavior_locp,
_mesa_glsl_parse_state *state)
{
ext_behavior behavior;
if (strcmp(behavior_string, "warn") == 0) {
behavior = extension_warn;
} else if (strcmp(behavior_string, "require") == 0) {
behavior = extension_require;
} else if (strcmp(behavior_string, "enable") == 0) {
behavior = extension_enable;
} else if (strcmp(behavior_string, "disable") == 0) {
behavior = extension_disable;
} else {
_mesa_glsl_error(behavior_locp, state,
"Unknown extension behavior `%s'",
behavior_string);
return false;
}
if (strcmp(name, "all") == 0) {
if ((behavior == extension_enable) || (behavior == extension_require)) {
_mesa_glsl_error(name_locp, state, "Cannot %s all extensions",
(behavior == extension_enable)
? "enable" : "require");
return false;
} else {
for (unsigned i = 0;
i < Elements(_mesa_glsl_supported_extensions); ++i) {
const _mesa_glsl_extension *extension
= &_mesa_glsl_supported_extensions[i];
if (extension->compatible_with_state(state)) {
_mesa_glsl_supported_extensions[i].set_flags(state, behavior);
}
}
}
} else {
const _mesa_glsl_extension *extension = find_extension(name);
if (extension && extension->compatible_with_state(state)) {
extension->set_flags(state, behavior);
} else {
static const char *const fmt = "extension `%s' unsupported in %s shader";
if (behavior == extension_require) {
_mesa_glsl_error(name_locp, state, fmt,
name, _mesa_glsl_shader_target_name(state->target));
return false;
} else {
_mesa_glsl_warning(name_locp, state, fmt,
name, _mesa_glsl_shader_target_name(state->target));
}
}
}
return true;
}
void
_mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
{
if (q->flags.q.constant)
printf("const ");
if (q->flags.q.invariant)
printf("invariant ");
if (q->flags.q.attribute)
printf("attribute ");
if (q->flags.q.varying)
printf("varying ");
if (q->flags.q.in && q->flags.q.out)
printf("inout ");
else {
if (q->flags.q.in)
printf("in ");
if (q->flags.q.out)
printf("out ");
}
if (q->flags.q.centroid)
printf("centroid ");
if (q->flags.q.uniform)
printf("uniform ");
if (q->flags.q.smooth)
printf("smooth ");
if (q->flags.q.flat)
printf("flat ");
if (q->flags.q.noperspective)
printf("noperspective ");
}
void
ast_node::print(void) const
{
printf("unhandled node ");
}
ast_node::ast_node(void)
{
this->location.source = 0;
this->location.line = 0;
this->location.column = 0;
}
static void
ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
{
if (is_array) {
printf("[ ");
if (array_size)
array_size->print();
printf("] ");
}
}
void
ast_compound_statement::print(void) const
{
printf("{\n");
foreach_list_const(n, &this->statements) {
ast_node *ast = exec_node_data(ast_node, n, link);
ast->print();
}
printf("}\n");
}
ast_compound_statement::ast_compound_statement(int new_scope,
ast_node *statements)
{
this->new_scope = new_scope;
if (statements != NULL) {
this->statements.push_degenerate_list_at_head(&statements->link);
}
}
void
ast_expression::print(void) const
{
switch (oper) {
case ast_assign:
case ast_mul_assign:
case ast_div_assign:
case ast_mod_assign:
case ast_add_assign:
case ast_sub_assign:
case ast_ls_assign:
case ast_rs_assign:
case ast_and_assign:
case ast_xor_assign:
case ast_or_assign:
subexpressions[0]->print();
printf("%s ", operator_string(oper));
subexpressions[1]->print();
break;
case ast_field_selection:
subexpressions[0]->print();
printf(". %s ", primary_expression.identifier);
break;
case ast_plus:
case ast_neg:
case ast_bit_not:
case ast_logic_not:
case ast_pre_inc:
case ast_pre_dec:
printf("%s ", operator_string(oper));
subexpressions[0]->print();
break;
case ast_post_inc:
case ast_post_dec:
subexpressions[0]->print();
printf("%s ", operator_string(oper));
break;
case ast_conditional:
subexpressions[0]->print();
printf("? ");
subexpressions[1]->print();
printf(": ");
subexpressions[2]->print();
break;
case ast_array_index:
subexpressions[0]->print();
printf("[ ");
subexpressions[1]->print();
printf("] ");
break;
case ast_function_call: {
subexpressions[0]->print();
printf("( ");
foreach_list_const (n, &this->expressions) {
if (n != this->expressions.get_head())
printf(", ");
ast_node *ast = exec_node_data(ast_node, n, link);
ast->print();
}
printf(") ");
break;
}
case ast_identifier:
printf("%s ", primary_expression.identifier);
break;
case ast_int_constant:
printf("%d ", primary_expression.int_constant);
break;
case ast_uint_constant:
printf("%u ", primary_expression.uint_constant);
break;
case ast_float_constant:
printf("%f ", primary_expression.float_constant);
break;
case ast_bool_constant:
printf("%s ",
primary_expression.bool_constant
? "true" : "false");
break;
case ast_sequence: {
printf("( ");
foreach_list_const(n, & this->expressions) {
if (n != this->expressions.get_head())
printf(", ");
ast_node *ast = exec_node_data(ast_node, n, link);
ast->print();
}
printf(") ");
break;
}
default:
assert(0);
break;
}
}
ast_expression::ast_expression(int oper,
ast_expression *ex0,
ast_expression *ex1,
ast_expression *ex2)
{
this->oper = ast_operators(oper);
this->subexpressions[0] = ex0;
this->subexpressions[1] = ex1;
this->subexpressions[2] = ex2;
this->non_lvalue_description = NULL;
}
void
ast_expression_statement::print(void) const
{
if (expression)
expression->print();
printf("; ");
}
ast_expression_statement::ast_expression_statement(ast_expression *ex) :
expression(ex)
{
/* empty */
}
void
ast_function::print(void) const
{
return_type->print();
printf(" %s (", identifier);
foreach_list_const(n, & this->parameters) {
ast_node *ast = exec_node_data(ast_node, n, link);
ast->print();
}
printf(")");
}
ast_function::ast_function(void)
: is_definition(false), signature(NULL)
{
/* empty */
}
void
ast_fully_specified_type::print(void) const
{
_mesa_ast_type_qualifier_print(& qualifier);
specifier->print();
}
void
ast_parameter_declarator::print(void) const
{
type->print();
if (identifier)
printf("%s ", identifier);
ast_opt_array_size_print(is_array, array_size);
}
void
ast_function_definition::print(void) const
{
prototype->print();
body->print();
}
void
ast_declaration::print(void) const
{
printf("%s ", identifier);
ast_opt_array_size_print(is_array, array_size);
if (initializer) {
printf("= ");
initializer->print();
}
}
ast_declaration::ast_declaration(const char *identifier, int is_array,
ast_expression *array_size,
ast_expression *initializer)
{
this->identifier = identifier;
this->is_array = is_array;
this->array_size = array_size;
this->initializer = initializer;
}
void
ast_declarator_list::print(void) const
{
assert(type || invariant);
if (type)
type->print();
else
printf("invariant ");
foreach_list_const (ptr, & this->declarations) {
if (ptr != this->declarations.get_head())
printf(", ");
ast_node *ast = exec_node_data(ast_node, ptr, link);
ast->print();
}
printf("; ");
}
ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
{
this->type = type;
this->invariant = false;
this->ubo_qualifiers_valid = false;
}
void
ast_jump_statement::print(void) const
{
switch (mode) {
case ast_continue:
printf("continue; ");
break;
case ast_break:
printf("break; ");
break;
case ast_return:
printf("return ");
if (opt_return_value)
opt_return_value->print();
printf("; ");
break;
case ast_discard:
printf("discard; ");
break;
}
}
ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
{
this->mode = ast_jump_modes(mode);
if (mode == ast_return)
opt_return_value = return_value;
}
void
ast_selection_statement::print(void) const
{
printf("if ( ");
condition->print();
printf(") ");
then_statement->print();
if (else_statement) {
printf("else ");
else_statement->print();
}
}
ast_selection_statement::ast_selection_statement(ast_expression *condition,
ast_node *then_statement,
ast_node *else_statement)
{
this->condition = condition;
this->then_statement = then_statement;
this->else_statement = else_statement;
}
void
ast_switch_statement::print(void) const
{
printf("switch ( ");
test_expression->print();
printf(") ");
body->print();
}
ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
ast_node *body)
{
this->test_expression = test_expression;
this->body = body;
}
void
ast_switch_body::print(void) const
{
printf("{\n");
if (stmts != NULL) {
stmts->print();
}
printf("}\n");
}
ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
{
this->stmts = stmts;
}
void ast_case_label::print(void) const
{
if (test_value != NULL) {
printf("case ");
test_value->print();
printf(": ");
} else {
printf("default: ");
}
}
ast_case_label::ast_case_label(ast_expression *test_value)
{
this->test_value = test_value;
}
void ast_case_label_list::print(void) const
{
foreach_list_const(n, & this->labels) {
ast_node *ast = exec_node_data(ast_node, n, link);
ast->print();
}
printf("\n");
}
ast_case_label_list::ast_case_label_list(void)
{
}
void ast_case_statement::print(void) const
{
labels->print();
foreach_list_const(n, & this->stmts) {
ast_node *ast = exec_node_data(ast_node, n, link);
ast->print();
printf("\n");
}
}
ast_case_statement::ast_case_statement(ast_case_label_list *labels)
{
this->labels = labels;
}
void ast_case_statement_list::print(void) const
{
foreach_list_const(n, & this->cases) {
ast_node *ast = exec_node_data(ast_node, n, link);
ast->print();
}
}
ast_case_statement_list::ast_case_statement_list(void)
{
}
void
ast_iteration_statement::print(void) const
{
switch (mode) {
case ast_for:
printf("for( ");
if (init_statement)
init_statement->print();
printf("; ");
if (condition)
condition->print();
printf("; ");
if (rest_expression)
rest_expression->print();
printf(") ");
body->print();
break;
case ast_while:
printf("while ( ");
if (condition)
condition->print();
printf(") ");
body->print();
break;
case ast_do_while:
printf("do ");
body->print();
printf("while ( ");
if (condition)
condition->print();
printf("); ");
break;
}
}
ast_iteration_statement::ast_iteration_statement(int mode,
ast_node *init,
ast_node *condition,
ast_expression *rest_expression,
ast_node *body)
{
this->mode = ast_iteration_modes(mode);
this->init_statement = init;
this->condition = condition;
this->rest_expression = rest_expression;
this->body = body;
}
void
ast_struct_specifier::print(void) const
{
printf("struct %s { ", name);
foreach_list_const(n, &this->declarations) {
ast_node *ast = exec_node_data(ast_node, n, link);
ast->print();
}
printf("} ");
}
ast_struct_specifier::ast_struct_specifier(const char *identifier,
ast_declarator_list *declarator_list)
{
if (identifier == NULL) {
static unsigned anon_count = 1;
identifier = ralloc_asprintf(this, "#anon_struct_%04x", anon_count);
anon_count++;
}
name = identifier;
this->declarations.push_degenerate_list_at_head(&declarator_list->link);
}
/**
* Do the set of common optimizations passes
*
* \param ir List of instructions to be optimized
* \param linked Is the shader linked? This enables
* optimizations passes that remove code at
* global scope and could cause linking to
* fail.
* \param uniform_locations_assigned Have locations already been assigned for
* uniforms? This prevents the declarations
* of unused uniforms from being removed.
* The setting of this flag only matters if
* \c linked is \c true.
* \param max_unroll_iterations Maximum number of loop iterations to be
* unrolled. Setting to 0 forces all loops
* to be unrolled.
*/
bool
do_common_optimization(exec_list *ir, bool linked,
bool uniform_locations_assigned,
unsigned max_unroll_iterations)
{
GLboolean progress = GL_FALSE;
progress = lower_instructions(ir, SUB_TO_ADD_NEG) || progress;
if (linked) {
progress = do_function_inlining(ir) || progress;
progress = do_dead_functions(ir) || progress;
progress = do_structure_splitting(ir) || progress;
}
progress = do_if_simplification(ir) || progress;
progress = do_copy_propagation(ir) || progress;
progress = do_copy_propagation_elements(ir) || progress;
if (linked)
progress = do_dead_code(ir, uniform_locations_assigned) || progress;
else
progress = do_dead_code_unlinked(ir) || progress;
progress = do_dead_code_local(ir) || progress;
progress = do_tree_grafting(ir) || progress;
progress = do_constant_propagation(ir) || progress;
if (linked)
progress = do_constant_variable(ir) || progress;
else
progress = do_constant_variable_unlinked(ir) || progress;
progress = do_constant_folding(ir) || progress;
progress = do_algebraic(ir) || progress;
progress = do_lower_jumps(ir) || progress;
progress = do_vec_index_to_swizzle(ir) || progress;
progress = do_swizzle_swizzle(ir) || progress;
progress = do_noop_swizzle(ir) || progress;
progress = optimize_split_arrays(ir, linked) || progress;
progress = optimize_redundant_jumps(ir) || progress;
loop_state *ls = analyze_loop_variables(ir);
if (ls->loop_found) {
progress = set_loop_controls(ir, ls) || progress;
progress = unroll_loops(ir, ls, max_unroll_iterations) || progress;
}
delete ls;
return progress;
}
extern "C" {
/**
* To be called at GL teardown time, this frees compiler datastructures.
*
* After calling this, any previously compiled shaders and shader
* programs would be invalid. So this should happen at approximately
* program exit.
*/
void
_mesa_destroy_shader_compiler(void)
{
_mesa_destroy_shader_compiler_caches();
_mesa_glsl_release_types();
}
/**
* Releases compiler caches to trade off performance for memory.
*
* Intended to be used with glReleaseShaderCompiler().
*/
void
_mesa_destroy_shader_compiler_caches(void)
{
_mesa_glsl_release_functions();
}
}
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