| /* |
| * Copyright © 2018 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" |
| |
| static bool |
| opt_shrink_load(nir_intrinsic_instr *instr) |
| { |
| bool progress = false; |
| |
| if (instr->intrinsic == nir_intrinsic_load_push_constant) { |
| unsigned mask = nir_ssa_def_components_read(&instr->dest.ssa); |
| |
| if (instr->num_components > util_last_bit(mask)) { |
| instr->num_components = util_last_bit(mask); |
| instr->dest.ssa.num_components = instr->num_components; |
| progress = true; |
| } |
| } |
| |
| return progress; |
| } |
| |
| bool |
| nir_opt_shrink_load(nir_shader *shader) |
| { |
| bool progress = false; |
| |
| nir_foreach_function(function, shader) { |
| if (!function->impl) |
| continue; |
| |
| nir_foreach_block(block, function->impl) { |
| nir_foreach_instr(instr, block) { |
| if (instr->type != nir_instr_type_intrinsic) |
| continue; |
| |
| progress |= opt_shrink_load(nir_instr_as_intrinsic(instr)); |
| } |
| } |
| |
| nir_metadata_preserve(function->impl, nir_metadata_block_index | |
| nir_metadata_dominance); |
| } |
| |
| return progress; |
| } |