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