0,0 → 1,80 |
/* |
* 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. |
*/ |
|
/** |
* \file opt_noop_swizzle.cpp |
* |
* If a swizzle doesn't change the order or count of components, then |
* remove the swizzle so that other optimization passes see the value |
* behind it. |
*/ |
|
#include "ir.h" |
#include "ir_visitor.h" |
#include "ir_rvalue_visitor.h" |
#include "ir_print_visitor.h" |
#include "glsl_types.h" |
|
class ir_noop_swizzle_visitor : public ir_rvalue_visitor { |
public: |
ir_noop_swizzle_visitor() |
{ |
this->progress = false; |
} |
|
void handle_rvalue(ir_rvalue **rvalue); |
bool progress; |
}; |
|
void |
ir_noop_swizzle_visitor::handle_rvalue(ir_rvalue **rvalue) |
{ |
if (!*rvalue) |
return; |
|
ir_swizzle *swiz = (*rvalue)->as_swizzle(); |
if (!swiz || swiz->type != swiz->val->type) |
return; |
|
int elems = swiz->val->type->vector_elements; |
if (swiz->mask.x != 0) |
return; |
if (elems >= 2 && swiz->mask.y != 1) |
return; |
if (elems >= 3 && swiz->mask.z != 2) |
return; |
if (elems >= 4 && swiz->mask.w != 3) |
return; |
|
this->progress = true; |
*rvalue = swiz->val; |
} |
|
bool |
do_noop_swizzle(exec_list *instructions) |
{ |
ir_noop_swizzle_visitor v; |
visit_list_elements(&v, instructions); |
|
return v.progress; |
} |