src/intel/compiler/brw_nir_clamp_image_1d_2d_array_sizes.c

   1 /*
   2  * Copyright © 2020 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "compiler/nir/nir_builder.h"
  25 #include "brw_nir.h"
  26
  27 /**
  28  * GEN:BUG:1806565034:
  29  *
  30  * Gen12+ allows to set RENDER_SURFACE_STATE::SurfaceArray to 1 only if
  31  * array_len > 1. Setting RENDER_SURFACE_STATE::SurfaceArray to 0 results in
  32  * the HW RESINFO message to report an array size of 0 which breaks texture
  33  * array size queries.
  34  *
  35  * This NIR pass works around this by patching the array size with a
  36  * MAX(array_size, 1) for array textures.
  37  */
  38
  39 bool
  40 brw_nir_clamp_image_1d_2d_array_sizes(nir_shader *shader)
  41 {
  42    bool progress = false;
  43    nir_builder b;
  44
  45    nir_foreach_function(func, shader) {
  46       bool function_progress = false;
  47
  48       if (!func->impl)
  49          continue;
  50
  51       nir_builder_init(&b, func->impl);
  52
  53       nir_foreach_block(block, func->impl) {
  54          nir_foreach_instr_safe(instr, block) {
  55             nir_ssa_def *image_size = NULL;
  56
  57             switch (instr->type) {
  58             case nir_instr_type_intrinsic: {
  59                nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
  60
  61                switch (intr->intrinsic) {
  62                case nir_intrinsic_image_size:
  63                case nir_intrinsic_bindless_image_size:
  64                   if (!nir_intrinsic_image_array(intr))
  65                      break;
  66
  67                   image_size = &intr->dest.ssa;
  68                   break;
  69
  70                case nir_intrinsic_image_deref_size: {
  71                   nir_deref_instr *deref = nir_src_as_deref(intr->src[0]);
  72
  73                   assert(glsl_type_is_image(deref->type));
  74
  75                   if (!glsl_sampler_type_is_array(deref->type))
  76                      break;
  77
  78                   image_size = &intr->dest.ssa;
  79                   break;
  80                }
  81
  82                default:
  83                   break;
  84                }
  85                break;
  86             }
  87
  88             case nir_instr_type_tex: {
  89                nir_tex_instr *tex_instr = nir_instr_as_tex(instr);
  90                if (tex_instr->op != nir_texop_txs)
  91                   break;
  92
  93                if (!tex_instr->is_array)
  94                   break;
  95
  96                image_size = &tex_instr->dest.ssa;
  97                break;
  98             }
  99
 100             default:
 101                break;
 102             }
 103
 104             if (!image_size)
 105                continue;
 106
 107             b.cursor = nir_after_instr(instr);
 108
 109             nir_ssa_def *components[4];
 110             for (int i = 0; i < image_size->num_components; i++) {
 111                if (i == (image_size->num_components - 1)) {
 112                   components[i] = nir_imax(&b, nir_channel(&b, image_size, i),
 113                                                nir_imm_int(&b, 1));
 114                } else {
 115                   components[i] = nir_channel(&b, image_size, i);
 116                }
 117             }
 118             nir_ssa_def *image_size_replacement =
 119                nir_vec(&b, components, image_size->num_components);
 120
 121             b.cursor = nir_after_instr(instr);
 122
 123             nir_ssa_def_rewrite_uses_after(image_size,
 124                                            nir_src_for_ssa(image_size_replacement),
 125                                            image_size_replacement->parent_instr);
 126
 127             function_progress = true;
 128          }
 129       }
 130
 131       if (function_progress) {
 132          nir_metadata_preserve(func->impl, nir_metadata_block_index |
 133                                            nir_metadata_dominance);
 134          progress = function_progress;
 135       } else {
 136          nir_metadata_preserve(func->impl, nir_metadata_all);
 137       }
 138    }
 139
 140    return progress;
 141 }