src/amd/common/ac_shader_info.c

   1 /*
   2  * Copyright © 2017 Red Hat
   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 #include "nir/nir.h"
  24 #include "ac_shader_info.h"
  25 #include "ac_nir_to_llvm.h"
  26
  27 static void mark_sampler_desc(nir_variable *var, struct ac_shader_info *info)
  28 {
  29         info->desc_set_used_mask = (1 << var->data.descriptor_set);
  30 }
  31
  32 static void
  33 gather_intrinsic_info(nir_intrinsic_instr *instr, struct ac_shader_info *info)
  34 {
  35         switch (instr->intrinsic) {
  36         case nir_intrinsic_interp_var_at_sample:
  37                 info->ps.needs_sample_positions = true;
  38                 break;
  39         case nir_intrinsic_load_draw_id:
  40                 info->vs.needs_draw_id = true;
  41                 break;
  42         case nir_intrinsic_load_instance_id:
  43                 info->vs.needs_instance_id = true;
  44                 break;
  45         case nir_intrinsic_load_num_work_groups:
  46                 info->cs.grid_components_used = instr->num_components;
  47                 break;
  48         case nir_intrinsic_vulkan_resource_index:
  49                 info->desc_set_used_mask |= (1 << nir_intrinsic_desc_set(instr));
  50                 break;
  51         case nir_intrinsic_image_load:
  52         case nir_intrinsic_image_store:
  53         case nir_intrinsic_image_atomic_add:
  54         case nir_intrinsic_image_atomic_min:
  55         case nir_intrinsic_image_atomic_max:
  56         case nir_intrinsic_image_atomic_and:
  57         case nir_intrinsic_image_atomic_or:
  58         case nir_intrinsic_image_atomic_xor:
  59         case nir_intrinsic_image_atomic_exchange:
  60         case nir_intrinsic_image_atomic_comp_swap:
  61         case nir_intrinsic_image_size:
  62                 mark_sampler_desc(instr->variables[0]->var, info);
  63                 break;
  64         default:
  65                 break;
  66         }
  67 }
  68
  69 static void
  70 gather_tex_info(nir_tex_instr *instr, struct ac_shader_info *info)
  71 {
  72         if (instr->sampler)
  73                 mark_sampler_desc(instr->sampler->var, info);
  74         if (instr->texture)
  75                 mark_sampler_desc(instr->texture->var, info);
  76 }
  77
  78 static void
  79 gather_info_block(nir_block *block, struct ac_shader_info *info)
  80 {
  81         nir_foreach_instr(instr, block) {
  82                 switch (instr->type) {
  83                 case nir_instr_type_intrinsic:
  84                         gather_intrinsic_info(nir_instr_as_intrinsic(instr), info);
  85                         break;
  86                 case nir_instr_type_tex:
  87                         gather_tex_info(nir_instr_as_tex(instr), info);
  88                         break;
  89                 default:
  90                         break;
  91                 }
  92         }
  93 }
  94
  95 static void
  96 gather_info_input_decl(nir_shader *nir,
  97                        const struct ac_nir_compiler_options *options,
  98                        nir_variable *var,
  99                        struct ac_shader_info *info)
 100 {
 101         switch (nir->stage) {
 102         case MESA_SHADER_VERTEX:
 103                 info->vs.has_vertex_buffers = true;
 104                 break;
 105         default:
 106                 break;
 107         }
 108 }
 109
 110 void
 111 ac_nir_shader_info_pass(struct nir_shader *nir,
 112                         const struct ac_nir_compiler_options *options,
 113                         struct ac_shader_info *info)
 114 {
 115         struct nir_function *func = (struct nir_function *)exec_list_get_head(&nir->functions);
 116
 117         info->needs_push_constants = true;
 118         if (!options->layout)
 119                 info->needs_push_constants = false;
 120         else if (!options->layout->push_constant_size &&
 121                  !options->layout->dynamic_offset_count)
 122                 info->needs_push_constants = false;
 123
 124         nir_foreach_variable(variable, &nir->inputs)
 125                 gather_info_input_decl(nir, options, variable, info);
 126
 127         nir_foreach_block(block, func->impl) {
 128                 gather_info_block(block, info);
 129         }
 130 }