1 /*
2 * Copyright © 2016 Intel Corporation
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
24 #include <gtest/gtest.h>
25 #include "brw_fs.h"
26 #include "brw_cfg.h"
27 #include "program/program.h"
28
29 using namespace brw;
30
31 class copy_propagation_test : public ::testing::Test {
32 virtual void SetUp();
33
34 public:
35 struct brw_compiler *compiler;
36 struct gen_device_info *devinfo;
37 struct gl_context *ctx;
38 struct brw_wm_prog_data *prog_data;
39 struct gl_shader_program *shader_prog;
40 fs_visitor *v;
41 };
42
43 class copy_propagation_fs_visitor : public fs_visitor
44 {
45 public:
copy_propagation_fs_visitor(struct brw_compiler * compiler,struct brw_wm_prog_data * prog_data,nir_shader * shader)46 copy_propagation_fs_visitor(struct brw_compiler *compiler,
47 struct brw_wm_prog_data *prog_data,
48 nir_shader *shader)
49 : fs_visitor(compiler, NULL, NULL, NULL,
50 &prog_data->base, shader, 8, -1) {}
51 };
52
53
SetUp()54 void copy_propagation_test::SetUp()
55 {
56 ctx = (struct gl_context *)calloc(1, sizeof(*ctx));
57 compiler = (struct brw_compiler *)calloc(1, sizeof(*compiler));
58 devinfo = (struct gen_device_info *)calloc(1, sizeof(*devinfo));
59 compiler->devinfo = devinfo;
60
61 prog_data = ralloc(NULL, struct brw_wm_prog_data);
62 nir_shader *shader =
63 nir_shader_create(NULL, MESA_SHADER_FRAGMENT, NULL, NULL);
64
65 v = new copy_propagation_fs_visitor(compiler, prog_data, shader);
66
67 devinfo->gen = 4;
68 }
69
70 static fs_inst *
instruction(bblock_t * block,int num)71 instruction(bblock_t *block, int num)
72 {
73 fs_inst *inst = (fs_inst *)block->start();
74 for (int i = 0; i < num; i++) {
75 inst = (fs_inst *)inst->next;
76 }
77 return inst;
78 }
79
80 static bool
copy_propagation(fs_visitor * v)81 copy_propagation(fs_visitor *v)
82 {
83 const bool print = getenv("TEST_DEBUG");
84
85 if (print) {
86 fprintf(stderr, "= Before =\n");
87 v->cfg->dump();
88 }
89
90 bool ret = v->opt_copy_propagation();
91
92 if (print) {
93 fprintf(stderr, "\n= After =\n");
94 v->cfg->dump();
95 }
96
97 return ret;
98 }
99
TEST_F(copy_propagation_test,basic)100 TEST_F(copy_propagation_test, basic)
101 {
102 const fs_builder &bld = v->bld;
103 fs_reg vgrf0 = v->vgrf(glsl_type::float_type);
104 fs_reg vgrf1 = v->vgrf(glsl_type::float_type);
105 fs_reg vgrf2 = v->vgrf(glsl_type::float_type);
106 fs_reg vgrf3 = v->vgrf(glsl_type::float_type);
107 bld.MOV(vgrf0, vgrf2);
108 bld.ADD(vgrf1, vgrf0, vgrf3);
109
110 /* = Before =
111 *
112 * 0: mov(8) vgrf0 vgrf2
113 * 1: add(8) vgrf1 vgrf0 vgrf3
114 *
115 * = After =
116 * 0: mov(8) vgrf0 vgrf2
117 * 1: add(8) vgrf1 vgrf2 vgrf3
118 */
119
120 v->calculate_cfg();
121 bblock_t *block0 = v->cfg->blocks[0];
122
123 EXPECT_EQ(0, block0->start_ip);
124 EXPECT_EQ(1, block0->end_ip);
125
126 EXPECT_TRUE(copy_propagation(v));
127 EXPECT_EQ(0, block0->start_ip);
128 EXPECT_EQ(1, block0->end_ip);
129
130 fs_inst *mov = instruction(block0, 0);
131 EXPECT_EQ(BRW_OPCODE_MOV, mov->opcode);
132 EXPECT_TRUE(mov->dst.equals(vgrf0));
133 EXPECT_TRUE(mov->src[0].equals(vgrf2));
134
135 fs_inst *add = instruction(block0, 1);
136 EXPECT_EQ(BRW_OPCODE_ADD, add->opcode);
137 EXPECT_TRUE(add->dst.equals(vgrf1));
138 EXPECT_TRUE(add->src[0].equals(vgrf2));
139 EXPECT_TRUE(add->src[1].equals(vgrf3));
140 }
141
TEST_F(copy_propagation_test,maxmax_sat_imm)142 TEST_F(copy_propagation_test, maxmax_sat_imm)
143 {
144 const fs_builder &bld = v->bld;
145 fs_reg vgrf0 = v->vgrf(glsl_type::float_type);
146 fs_reg vgrf1 = v->vgrf(glsl_type::float_type);
147 fs_reg vgrf2 = v->vgrf(glsl_type::float_type);
148
149 static const struct {
150 enum brw_conditional_mod conditional_mod;
151 float immediate;
152 bool expected_result;
153 } test[] = {
154 /* conditional mod, imm, expected_result */
155 { BRW_CONDITIONAL_GE , 0.1f, true },
156 { BRW_CONDITIONAL_L , 0.1f, true },
157 { BRW_CONDITIONAL_GE , 0.5f, true },
158 { BRW_CONDITIONAL_L , 0.5f, true },
159 { BRW_CONDITIONAL_GE , 0.9f, true },
160 { BRW_CONDITIONAL_L , 0.9f, true },
161 { BRW_CONDITIONAL_GE , -1.5f, false },
162 { BRW_CONDITIONAL_L , -1.5f, false },
163 { BRW_CONDITIONAL_GE , 1.5f, false },
164 { BRW_CONDITIONAL_L , 1.5f, false },
165
166 { BRW_CONDITIONAL_NONE, 0.5f, false },
167 { BRW_CONDITIONAL_Z , 0.5f, false },
168 { BRW_CONDITIONAL_NZ , 0.5f, false },
169 { BRW_CONDITIONAL_G , 0.5f, false },
170 { BRW_CONDITIONAL_LE , 0.5f, false },
171 { BRW_CONDITIONAL_R , 0.5f, false },
172 { BRW_CONDITIONAL_O , 0.5f, false },
173 { BRW_CONDITIONAL_U , 0.5f, false },
174 };
175
176 for (unsigned i = 0; i < sizeof(test) / sizeof(test[0]); i++) {
177 fs_inst *mov = set_saturate(true, bld.MOV(vgrf0, vgrf1));
178 fs_inst *sel = set_condmod(test[i].conditional_mod,
179 bld.SEL(vgrf2, vgrf0,
180 brw_imm_f(test[i].immediate)));
181
182 v->calculate_cfg();
183
184 bblock_t *block0 = v->cfg->blocks[0];
185
186 EXPECT_EQ(0, block0->start_ip);
187 EXPECT_EQ(1, block0->end_ip);
188
189 EXPECT_EQ(test[i].expected_result, copy_propagation(v));
190 EXPECT_EQ(0, block0->start_ip);
191 EXPECT_EQ(1, block0->end_ip);
192
193 EXPECT_EQ(BRW_OPCODE_MOV, mov->opcode);
194 EXPECT_TRUE(mov->saturate);
195 EXPECT_TRUE(mov->dst.equals(vgrf0));
196 EXPECT_TRUE(mov->src[0].equals(vgrf1));
197
198 EXPECT_EQ(BRW_OPCODE_SEL, sel->opcode);
199 EXPECT_EQ(test[i].conditional_mod, sel->conditional_mod);
200 EXPECT_EQ(test[i].expected_result, sel->saturate);
201 EXPECT_TRUE(sel->dst.equals(vgrf2));
202 if (test[i].expected_result) {
203 EXPECT_TRUE(sel->src[0].equals(vgrf1));
204 } else {
205 EXPECT_TRUE(sel->src[0].equals(vgrf0));
206 }
207 EXPECT_TRUE(sel->src[1].equals(brw_imm_f(test[i].immediate)));
208
209 delete v->cfg;
210 v->cfg = NULL;
211 }
212 }
213