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6279074de1
We have a pass to lower global registers to locals and many drivers dutifully call it. However, no one ever creates a global register ever so it's all dead code. It's time we bury it. Acked-by: Karol Herbst <kherbst@redhat.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/*
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* Copyright © 2019 Valve 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 DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#include "nir.h"
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#include "util/debug.h"
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/* This pass removes information which is only useful for debugging,
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* making cache hits from similar shaders more likely.
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*/
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static void
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strip_variable(nir_variable *var)
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{
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var->name = NULL;
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if (var->data.mode != nir_var_shader_in &&
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var->data.mode != nir_var_shader_out) {
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/* We assume that this is called after nir_lower_io(), at which point
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* the original user-facing location is irrelevant except for inputs and
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* outputs.
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*/
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var->data.location = 0;
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}
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}
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static void
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strip_register(nir_register *reg)
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{
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reg->name = NULL;
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}
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static bool
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strip_def(nir_ssa_def *def, void *_unused)
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{
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(void) _unused;
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def->name = NULL;
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return true;
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}
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static void
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strip_impl(nir_function_impl *impl)
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{
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nir_index_ssa_defs(impl);
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nir_foreach_variable(var, &impl->locals)
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strip_variable(var);
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nir_foreach_register(reg, &impl->registers)
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strip_register(reg);
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nir_foreach_block(block, impl) {
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nir_foreach_instr(instr, block) {
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nir_foreach_ssa_def(instr, strip_def, NULL);
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}
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}
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}
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void
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nir_strip(nir_shader *shader)
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{
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static int should_strip = -1;
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if (should_strip < 0)
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should_strip = env_var_as_boolean("NIR_STRIP", true);
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if (!should_strip)
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return;
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shader->info.name = NULL;
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shader->info.label = NULL;
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nir_foreach_variable(var, &shader->uniforms)
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strip_variable(var);
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nir_foreach_variable(var, &shader->inputs)
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strip_variable(var);
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nir_foreach_variable(var, &shader->outputs)
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strip_variable(var);
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nir_foreach_variable(var, &shader->system_values)
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strip_variable(var);
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nir_foreach_variable(var, &shader->globals)
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strip_variable(var);
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nir_foreach_function(func, shader) {
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if (func->impl)
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strip_impl(func->impl);
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}
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}
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