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.uses_grid_size = true;
  47                 break;
  48         case nir_intrinsic_load_local_invocation_id:
  49         case nir_intrinsic_load_work_group_id: {
  50                 unsigned mask = nir_ssa_def_components_read(&instr->dest.ssa);
  51                 while (mask) {
  52                         unsigned i = u_bit_scan(&mask);
  53
  54                         if (instr->intrinsic == nir_intrinsic_load_work_group_id)
  55                                 info->cs.uses_block_id[i] = true;
  56                         else
  57                                 info->cs.uses_thread_id[i] = true;
  58                 }
  59                 break;
  60         }
  61         case nir_intrinsic_load_sample_id:
  62                 info->ps.force_persample = true;
  63                 break;
  64         case nir_intrinsic_load_sample_pos:
  65                 info->ps.force_persample = true;
  66                 break;
  67         case nir_intrinsic_load_view_index:
  68                 info->needs_multiview_view_index = true;
  69                 break;
  70         case nir_intrinsic_vulkan_resource_index:
  71                 info->desc_set_used_mask |= (1 << nir_intrinsic_desc_set(instr));
  72                 break;
  73         case nir_intrinsic_image_load:
  74         case nir_intrinsic_image_store:
  75         case nir_intrinsic_image_atomic_add:
  76         case nir_intrinsic_image_atomic_min:
  77         case nir_intrinsic_image_atomic_max:
  78         case nir_intrinsic_image_atomic_and:
  79         case nir_intrinsic_image_atomic_or:
  80         case nir_intrinsic_image_atomic_xor:
  81         case nir_intrinsic_image_atomic_exchange:
  82         case nir_intrinsic_image_atomic_comp_swap:
  83         case nir_intrinsic_image_size: {
  84                 const struct glsl_type *type = instr->variables[0]->var->type;
  85                 if(instr->variables[0]->deref.child)
  86                         type = instr->variables[0]->deref.child->type;
  87
  88                 enum glsl_sampler_dim dim = glsl_get_sampler_dim(type);
  89                 if (dim == GLSL_SAMPLER_DIM_SUBPASS ||
  90                     dim == GLSL_SAMPLER_DIM_SUBPASS_MS)
  91                         info->ps.uses_input_attachments = true;
  92                 mark_sampler_desc(instr->variables[0]->var, info);
  93                 break;
  94         }
  95         default:
  96                 break;
  97         }
  98 }
  99
 100 static void
 101 gather_tex_info(nir_tex_instr *instr, struct ac_shader_info *info)
 102 {
 103         if (instr->sampler)
 104                 mark_sampler_desc(instr->sampler->var, info);
 105         if (instr->texture)
 106                 mark_sampler_desc(instr->texture->var, info);
 107 }
 108
 109 static void
 110 gather_info_block(nir_block *block, struct ac_shader_info *info)
 111 {
 112         nir_foreach_instr(instr, block) {
 113                 switch (instr->type) {
 114                 case nir_instr_type_intrinsic:
 115                         gather_intrinsic_info(nir_instr_as_intrinsic(instr), info);
 116                         break;
 117                 case nir_instr_type_tex:
 118                         gather_tex_info(nir_instr_as_tex(instr), info);
 119                         break;
 120                 default:
 121                         break;
 122                 }
 123         }
 124 }
 125
 126 static void
 127 gather_info_input_decl(nir_shader *nir,
 128                        const struct ac_nir_compiler_options *options,
 129                        nir_variable *var,
 130                        struct ac_shader_info *info)
 131 {
 132         switch (nir->info.stage) {
 133         case MESA_SHADER_VERTEX:
 134                 info->vs.has_vertex_buffers = true;
 135                 break;
 136         default:
 137                 break;
 138         }
 139 }
 140
 141 void
 142 ac_nir_shader_info_pass(struct nir_shader *nir,
 143                         const struct ac_nir_compiler_options *options,
 144                         struct ac_shader_info *info)
 145 {
 146         struct nir_function *func = (struct nir_function *)exec_list_get_head(&nir->functions);
 147
 148         info->needs_push_constants = true;
 149         if (!options->layout)
 150                 info->needs_push_constants = false;
 151         else if (!options->layout->push_constant_size &&
 152                  !options->layout->dynamic_offset_count)
 153                 info->needs_push_constants = false;
 154
 155         nir_foreach_variable(variable, &nir->inputs)
 156                 gather_info_input_decl(nir, options, variable, info);
 157
 158         nir_foreach_block(block, func->impl) {
 159                 gather_info_block(block, info);
 160         }
 161 }