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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 
mark_sampler_desc(const nir_variable * var,struct ac_shader_info * info)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
gather_intrinsic_info(const nir_intrinsic_instr * instr,struct ac_shader_info * info)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
gather_tex_info(const nir_tex_instr * instr,struct ac_shader_info * info)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
gather_info_block(const nir_block * block,struct ac_shader_info * info)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
gather_info_input_decl(const nir_shader * nir,const nir_variable * var,struct ac_shader_info * info)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
ac_nir_shader_info_pass(const struct nir_shader * nir,const struct ac_nir_compiler_options * options,struct ac_shader_info * info)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