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/*
* Copyright © 2019 Valve 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 "nir.h"
#include "util/debug.h"
/* This pass removes information which is only useful for debugging,
* making cache hits from similar shaders more likely.
*/
static void
strip_variable(nir_variable *var)
{
var->name = NULL;
if (var->data.mode != nir_var_shader_in &&
var->data.mode != nir_var_shader_out) {
/* We assume that this is called after nir_lower_io(), at which point
* the original user-facing location is irrelevant except for inputs and
* outputs.
*/
var->data.location = 0;
}
}
static void
strip_register(nir_register *reg)
{
reg->name = NULL;
}
static bool
strip_def(nir_ssa_def *def, void *_unused)
{
(void) _unused;
def->name = NULL;
return true;
}
static void
strip_impl(nir_function_impl *impl)
{
nir_index_ssa_defs(impl);
nir_foreach_variable(var, &impl->locals)
strip_variable(var);
nir_foreach_register(reg, &impl->registers)
strip_register(reg);
nir_foreach_block(block, impl) {
nir_foreach_instr(instr, block) {
nir_foreach_ssa_def(instr, strip_def, NULL);
}
}
}
void
nir_strip(nir_shader *shader)
{
static int should_strip = -1;
if (should_strip < 0)
should_strip = env_var_as_boolean("NIR_STRIP", true);
if (!should_strip)
return;
shader->info.name = NULL;
shader->info.label = NULL;
nir_foreach_variable(var, &shader->uniforms)
strip_variable(var);
nir_foreach_variable(var, &shader->inputs)
strip_variable(var);
nir_foreach_variable(var, &shader->outputs)
strip_variable(var);
nir_foreach_variable(var, &shader->system_values)
strip_variable(var);
nir_foreach_variable(var, &shader->globals)
strip_variable(var);
nir_foreach_function(func, shader) {
if (func->impl)
strip_impl(func->impl);
}
}
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