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, (struct gl_program *) NULL,
51 shader, 8, -1) {}
52 };
53
54
SetUp()55 void copy_propagation_test::SetUp()
56 {
57 ctx = (struct gl_context *)calloc(1, sizeof(*ctx));
58 compiler = (struct brw_compiler *)calloc(1, sizeof(*compiler));
59 devinfo = (struct gen_device_info *)calloc(1, sizeof(*devinfo));
60 compiler->devinfo = devinfo;
61
62 prog_data = ralloc(NULL, struct brw_wm_prog_data);
63 nir_shader *shader =
64 nir_shader_create(NULL, MESA_SHADER_FRAGMENT, NULL, NULL);
65
66 v = new copy_propagation_fs_visitor(compiler, prog_data, shader);
67
68 devinfo->gen = 4;
69 }
70
71 static fs_inst *
instruction(bblock_t * block,int num)72 instruction(bblock_t *block, int num)
73 {
74 fs_inst *inst = (fs_inst *)block->start();
75 for (int i = 0; i < num; i++) {
76 inst = (fs_inst *)inst->next;
77 }
78 return inst;
79 }
80
81 static bool
copy_propagation(fs_visitor * v)82 copy_propagation(fs_visitor *v)
83 {
84 const bool print = getenv("TEST_DEBUG");
85
86 if (print) {
87 fprintf(stderr, "= Before =\n");
88 v->cfg->dump(v);
89 }
90
91 bool ret = v->opt_copy_propagation();
92
93 if (print) {
94 fprintf(stderr, "\n= After =\n");
95 v->cfg->dump(v);
96 }
97
98 return ret;
99 }
100
TEST_F(copy_propagation_test,basic)101 TEST_F(copy_propagation_test, basic)
102 {
103 const fs_builder &bld = v->bld;
104 fs_reg vgrf0 = v->vgrf(glsl_type::float_type);
105 fs_reg vgrf1 = v->vgrf(glsl_type::float_type);
106 fs_reg vgrf2 = v->vgrf(glsl_type::float_type);
107 fs_reg vgrf3 = v->vgrf(glsl_type::float_type);
108 bld.MOV(vgrf0, vgrf2);
109 bld.ADD(vgrf1, vgrf0, vgrf3);
110
111 /* = Before =
112 *
113 * 0: mov(8) vgrf0 vgrf2
114 * 1: add(8) vgrf1 vgrf0 vgrf3
115 *
116 * = After =
117 * 0: mov(8) vgrf0 vgrf2
118 * 1: add(8) vgrf1 vgrf2 vgrf3
119 */
120
121 v->calculate_cfg();
122 bblock_t *block0 = v->cfg->blocks[0];
123
124 EXPECT_EQ(0, block0->start_ip);
125 EXPECT_EQ(1, block0->end_ip);
126
127 EXPECT_TRUE(copy_propagation(v));
128 EXPECT_EQ(0, block0->start_ip);
129 EXPECT_EQ(1, block0->end_ip);
130
131 fs_inst *mov = instruction(block0, 0);
132 EXPECT_EQ(BRW_OPCODE_MOV, mov->opcode);
133 EXPECT_TRUE(mov->dst.equals(vgrf0));
134 EXPECT_TRUE(mov->src[0].equals(vgrf2));
135
136 fs_inst *add = instruction(block0, 1);
137 EXPECT_EQ(BRW_OPCODE_ADD, add->opcode);
138 EXPECT_TRUE(add->dst.equals(vgrf1));
139 EXPECT_TRUE(add->src[0].equals(vgrf2));
140 EXPECT_TRUE(add->src[1].equals(vgrf3));
141 }
142
TEST_F(copy_propagation_test,maxmax_sat_imm)143 TEST_F(copy_propagation_test, maxmax_sat_imm)
144 {
145 const fs_builder &bld = v->bld;
146 fs_reg vgrf0 = v->vgrf(glsl_type::float_type);
147 fs_reg vgrf1 = v->vgrf(glsl_type::float_type);
148 fs_reg vgrf2 = v->vgrf(glsl_type::float_type);
149
150 static const struct {
151 enum brw_conditional_mod conditional_mod;
152 float immediate;
153 bool expected_result;
154 } test[] = {
155 /* conditional mod, imm, expected_result */
156 { BRW_CONDITIONAL_GE , 0.1f, true },
157 { BRW_CONDITIONAL_L , 0.1f, true },
158 { BRW_CONDITIONAL_GE , 0.5f, true },
159 { BRW_CONDITIONAL_L , 0.5f, true },
160 { BRW_CONDITIONAL_GE , 0.9f, true },
161 { BRW_CONDITIONAL_L , 0.9f, true },
162 { BRW_CONDITIONAL_GE , -1.5f, false },
163 { BRW_CONDITIONAL_L , -1.5f, false },
164 { BRW_CONDITIONAL_GE , 1.5f, false },
165 { BRW_CONDITIONAL_L , 1.5f, false },
166
167 { BRW_CONDITIONAL_NONE, 0.5f, false },
168 { BRW_CONDITIONAL_Z , 0.5f, false },
169 { BRW_CONDITIONAL_NZ , 0.5f, false },
170 { BRW_CONDITIONAL_G , 0.5f, false },
171 { BRW_CONDITIONAL_LE , 0.5f, false },
172 { BRW_CONDITIONAL_R , 0.5f, false },
173 { BRW_CONDITIONAL_O , 0.5f, false },
174 { BRW_CONDITIONAL_U , 0.5f, false },
175 };
176
177 for (unsigned i = 0; i < sizeof(test) / sizeof(test[0]); i++) {
178 fs_inst *mov = set_saturate(true, bld.MOV(vgrf0, vgrf1));
179 fs_inst *sel = set_condmod(test[i].conditional_mod,
180 bld.SEL(vgrf2, vgrf0,
181 brw_imm_f(test[i].immediate)));
182
183 v->calculate_cfg();
184
185 bblock_t *block0 = v->cfg->blocks[0];
186
187 EXPECT_EQ(0, block0->start_ip);
188 EXPECT_EQ(1, block0->end_ip);
189
190 EXPECT_EQ(test[i].expected_result, copy_propagation(v));
191 EXPECT_EQ(0, block0->start_ip);
192 EXPECT_EQ(1, block0->end_ip);
193
194 EXPECT_EQ(BRW_OPCODE_MOV, mov->opcode);
195 EXPECT_TRUE(mov->saturate);
196 EXPECT_TRUE(mov->dst.equals(vgrf0));
197 EXPECT_TRUE(mov->src[0].equals(vgrf1));
198
199 EXPECT_EQ(BRW_OPCODE_SEL, sel->opcode);
200 EXPECT_EQ(test[i].conditional_mod, sel->conditional_mod);
201 EXPECT_EQ(test[i].expected_result, sel->saturate);
202 EXPECT_TRUE(sel->dst.equals(vgrf2));
203 if (test[i].expected_result) {
204 EXPECT_TRUE(sel->src[0].equals(vgrf1));
205 } else {
206 EXPECT_TRUE(sel->src[0].equals(vgrf0));
207 }
208 EXPECT_TRUE(sel->src[1].equals(brw_imm_f(test[i].immediate)));
209
210 delete v->cfg;
211 v->cfg = NULL;
212 }
213 }
214