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      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(const nir_variable *var,
     28 			      struct ac_shader_info *info)
     29 {
     30 	info->desc_set_used_mask = (1 << var->data.descriptor_set);
     31 }
     32 
     33 static void
     34 gather_intrinsic_info(const nir_intrinsic_instr *instr,
     35 		      struct ac_shader_info *info)
     36 {
     37 	switch (instr->intrinsic) {
     38 	case nir_intrinsic_interp_var_at_sample:
     39 		info->ps.needs_sample_positions = true;
     40 		break;
     41 	case nir_intrinsic_load_draw_id:
     42 		info->vs.needs_draw_id = true;
     43 		break;
     44 	case nir_intrinsic_load_instance_id:
     45 		info->vs.needs_instance_id = true;
     46 		break;
     47 	case nir_intrinsic_load_num_work_groups:
     48 		info->cs.uses_grid_size = true;
     49 		break;
     50 	case nir_intrinsic_load_local_invocation_id:
     51 	case nir_intrinsic_load_work_group_id: {
     52 		unsigned mask = nir_ssa_def_components_read(&instr->dest.ssa);
     53 		while (mask) {
     54 			unsigned i = u_bit_scan(&mask);
     55 
     56 			if (instr->intrinsic == nir_intrinsic_load_work_group_id)
     57 				info->cs.uses_block_id[i] = true;
     58 			else
     59 				info->cs.uses_thread_id[i] = true;
     60 		}
     61 		break;
     62 	}
     63 	case nir_intrinsic_load_local_invocation_index:
     64 		info->cs.uses_local_invocation_idx = true;
     65 		break;
     66 	case nir_intrinsic_load_sample_id:
     67 		info->ps.force_persample = true;
     68 		break;
     69 	case nir_intrinsic_load_sample_pos:
     70 		info->ps.force_persample = true;
     71 		break;
     72 	case nir_intrinsic_load_view_index:
     73 		info->needs_multiview_view_index = true;
     74 		break;
     75 	case nir_intrinsic_load_invocation_id:
     76 		info->uses_invocation_id = true;
     77 		break;
     78 	case nir_intrinsic_load_primitive_id:
     79 		info->uses_prim_id = true;
     80 		break;
     81 	case nir_intrinsic_load_push_constant:
     82 		info->loads_push_constants = true;
     83 		break;
     84 	case nir_intrinsic_vulkan_resource_index:
     85 		info->desc_set_used_mask |= (1 << nir_intrinsic_desc_set(instr));
     86 		break;
     87 	case nir_intrinsic_image_load:
     88 	case nir_intrinsic_image_store:
     89 	case nir_intrinsic_image_atomic_add:
     90 	case nir_intrinsic_image_atomic_min:
     91 	case nir_intrinsic_image_atomic_max:
     92 	case nir_intrinsic_image_atomic_and:
     93 	case nir_intrinsic_image_atomic_or:
     94 	case nir_intrinsic_image_atomic_xor:
     95 	case nir_intrinsic_image_atomic_exchange:
     96 	case nir_intrinsic_image_atomic_comp_swap:
     97 	case nir_intrinsic_image_size: {
     98 		const struct glsl_type *type = instr->variables[0]->var->type;
     99 		if(instr->variables[0]->deref.child)
    100 			type = instr->variables[0]->deref.child->type;
    101 
    102 		enum glsl_sampler_dim dim = glsl_get_sampler_dim(type);
    103 		if (dim == GLSL_SAMPLER_DIM_SUBPASS ||
    104 		    dim == GLSL_SAMPLER_DIM_SUBPASS_MS)
    105 			info->ps.uses_input_attachments = true;
    106 		mark_sampler_desc(instr->variables[0]->var, info);
    107 		break;
    108 	}
    109 	default:
    110 		break;
    111 	}
    112 }
    113 
    114 static void
    115 gather_tex_info(const nir_tex_instr *instr, struct ac_shader_info *info)
    116 {
    117 	if (instr->sampler)
    118 		mark_sampler_desc(instr->sampler->var, info);
    119 	if (instr->texture)
    120 		mark_sampler_desc(instr->texture->var, info);
    121 }
    122 
    123 static void
    124 gather_info_block(const nir_block *block, struct ac_shader_info *info)
    125 {
    126 	nir_foreach_instr(instr, block) {
    127 		switch (instr->type) {
    128 		case nir_instr_type_intrinsic:
    129 			gather_intrinsic_info(nir_instr_as_intrinsic(instr), info);
    130 			break;
    131 		case nir_instr_type_tex:
    132 			gather_tex_info(nir_instr_as_tex(instr), info);
    133 			break;
    134 		default:
    135 			break;
    136 		}
    137 	}
    138 }
    139 
    140 static void
    141 gather_info_input_decl(const nir_shader *nir, const nir_variable *var,
    142 		       struct ac_shader_info *info)
    143 {
    144 	switch (nir->info.stage) {
    145 	case MESA_SHADER_VERTEX:
    146 		info->vs.has_vertex_buffers = true;
    147 		break;
    148 	default:
    149 		break;
    150 	}
    151 }
    152 
    153 void
    154 ac_nir_shader_info_pass(const struct nir_shader *nir,
    155 			const struct ac_nir_compiler_options *options,
    156 			struct ac_shader_info *info)
    157 {
    158 	struct nir_function *func =
    159 		(struct nir_function *)exec_list_get_head_const(&nir->functions);
    160 
    161 	if (options->layout->dynamic_offset_count)
    162 		info->loads_push_constants = true;
    163 
    164 	nir_foreach_variable(variable, &nir->inputs)
    165 		gather_info_input_decl(nir, variable, info);
    166 
    167 	nir_foreach_block(block, func->impl) {
    168 		gather_info_block(block, info);
    169 	}
    170 }
    171