mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
synced 2025-12-24 13:10:10 +01:00
807e967c61
Currently, ir_call can be used as either a statement (for void functions) or a value (for non-void functions). This is rather awkward, as it's the only class that can be used in both forms. A number of places use ir_call::get_error_instruction() to construct a generic value of error_type. If ir_call is to become a statement, it can no longer serve this purpose. Unfortunately, none of our classes are particularly well suited for this, and creating a new one would be rather aggrandizing. So, this patch introduces ir_rvalue::error_value(), a static method that creates an instance of the base class, ir_rvalue. This has the nice property that you can't accidentally try and access uninitialized fields (as it doesn't have any). The downside is that the base class is no longer abstract. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Eric Anholt <eric@anholt.net> Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
102 lines
3.9 KiB
C++
102 lines
3.9 KiB
C++
/*
|
|
* Copyright © 2010 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 "ir.h"
|
|
#include "program/symbol_table.h"
|
|
#include "glsl_parser_extras.h"
|
|
#include "ast.h"
|
|
#include "glsl_types.h"
|
|
|
|
ir_rvalue *
|
|
_mesa_ast_field_selection_to_hir(const ast_expression *expr,
|
|
exec_list *instructions,
|
|
struct _mesa_glsl_parse_state *state)
|
|
{
|
|
void *ctx = state;
|
|
ir_rvalue *result = NULL;
|
|
ir_rvalue *op;
|
|
|
|
op = expr->subexpressions[0]->hir(instructions, state);
|
|
|
|
/* There are two kinds of field selection. There is the selection of a
|
|
* specific field from a structure, and there is the selection of a
|
|
* swizzle / mask from a vector. Which is which is determined entirely
|
|
* by the base type of the thing to which the field selection operator is
|
|
* being applied.
|
|
*/
|
|
YYLTYPE loc = expr->get_location();
|
|
if (op->type->is_error()) {
|
|
/* silently propagate the error */
|
|
} else if (op->type->is_vector()) {
|
|
ir_swizzle *swiz = ir_swizzle::create(op,
|
|
expr->primary_expression.identifier,
|
|
op->type->vector_elements);
|
|
if (swiz != NULL) {
|
|
result = swiz;
|
|
} else {
|
|
/* FINISHME: Logging of error messages should be moved into
|
|
* FINISHME: ir_swizzle::create. This allows the generation of more
|
|
* FINISHME: specific error messages.
|
|
*/
|
|
_mesa_glsl_error(& loc, state, "Invalid swizzle / mask `%s'",
|
|
expr->primary_expression.identifier);
|
|
}
|
|
} else if (op->type->base_type == GLSL_TYPE_STRUCT) {
|
|
result = new(ctx) ir_dereference_record(op,
|
|
expr->primary_expression.identifier);
|
|
|
|
if (result->type->is_error()) {
|
|
_mesa_glsl_error(& loc, state, "Cannot access field `%s' of "
|
|
"structure",
|
|
expr->primary_expression.identifier);
|
|
}
|
|
} else if (expr->subexpressions[1] != NULL) {
|
|
/* Handle "method calls" in GLSL 1.20 - namely, array.length() */
|
|
if (state->language_version < 120)
|
|
_mesa_glsl_error(&loc, state, "Methods not supported in GLSL 1.10.");
|
|
|
|
ast_expression *call = expr->subexpressions[1];
|
|
assert(call->oper == ast_function_call);
|
|
|
|
const char *method;
|
|
method = call->subexpressions[0]->primary_expression.identifier;
|
|
|
|
if (op->type->is_array() && strcmp(method, "length") == 0) {
|
|
if (!call->expressions.is_empty())
|
|
_mesa_glsl_error(&loc, state, "length method takes no arguments.");
|
|
|
|
if (op->type->array_size() == 0)
|
|
_mesa_glsl_error(&loc, state, "length called on unsized array.");
|
|
|
|
result = new(ctx) ir_constant(op->type->array_size());
|
|
} else {
|
|
_mesa_glsl_error(&loc, state, "Unknown method: `%s'.", method);
|
|
}
|
|
} else {
|
|
_mesa_glsl_error(& loc, state, "Cannot access field `%s' of "
|
|
"non-structure / non-vector.",
|
|
expr->primary_expression.identifier);
|
|
}
|
|
|
|
return result ? result : ir_rvalue::error_value(ctx);
|
|
}
|