1 /*
2 * Copyright © 2014 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_vec4.h"
26 #include "program/program.h"
27
28 using namespace brw;
29
30 int ret = 0;
31
32 class copy_propagation_test : public ::testing::Test {
33 virtual void SetUp();
34
35 public:
36 struct brw_compiler *compiler;
37 struct gen_device_info *devinfo;
38 struct gl_context *ctx;
39 struct gl_shader_program *shader_prog;
40 struct brw_vue_prog_data *prog_data;
41 vec4_visitor *v;
42 };
43
44 class copy_propagation_vec4_visitor : public vec4_visitor
45 {
46 public:
copy_propagation_vec4_visitor(struct brw_compiler * compiler,nir_shader * shader,struct brw_vue_prog_data * prog_data)47 copy_propagation_vec4_visitor(struct brw_compiler *compiler,
48 nir_shader *shader,
49 struct brw_vue_prog_data *prog_data)
50 : vec4_visitor(compiler, NULL, NULL, prog_data, shader, NULL,
51 false /* no_spills */, -1)
52 {
53 prog_data->dispatch_mode = DISPATCH_MODE_4X2_DUAL_OBJECT;
54 }
55
56 protected:
make_reg_for_system_value(int location)57 virtual dst_reg *make_reg_for_system_value(int location)
58 {
59 unreachable("Not reached");
60 }
61
setup_payload()62 virtual void setup_payload()
63 {
64 unreachable("Not reached");
65 }
66
emit_prolog()67 virtual void emit_prolog()
68 {
69 unreachable("Not reached");
70 }
71
emit_thread_end()72 virtual void emit_thread_end()
73 {
74 unreachable("Not reached");
75 }
76
emit_urb_write_header(int mrf)77 virtual void emit_urb_write_header(int mrf)
78 {
79 unreachable("Not reached");
80 }
81
emit_urb_write_opcode(bool complete)82 virtual vec4_instruction *emit_urb_write_opcode(bool complete)
83 {
84 unreachable("Not reached");
85 }
86 };
87
88
SetUp()89 void copy_propagation_test::SetUp()
90 {
91 ctx = (struct gl_context *)calloc(1, sizeof(*ctx));
92 compiler = (struct brw_compiler *)calloc(1, sizeof(*compiler));
93 devinfo = (struct gen_device_info *)calloc(1, sizeof(*devinfo));
94 prog_data = (struct brw_vue_prog_data *)calloc(1, sizeof(*prog_data));
95 compiler->devinfo = devinfo;
96
97 nir_shader *shader =
98 nir_shader_create(NULL, MESA_SHADER_VERTEX, NULL, NULL);
99
100 v = new copy_propagation_vec4_visitor(compiler, shader, prog_data);
101
102 devinfo->gen = 4;
103 }
104
105 static void
copy_propagation(vec4_visitor * v)106 copy_propagation(vec4_visitor *v)
107 {
108 bool print = false;
109
110 if (print) {
111 fprintf(stderr, "instructions before:\n");
112 v->dump_instructions();
113 }
114
115 v->calculate_cfg();
116 v->opt_copy_propagation();
117
118 if (print) {
119 fprintf(stderr, "instructions after:\n");
120 v->dump_instructions();
121 }
122 }
123
TEST_F(copy_propagation_test,test_swizzle_swizzle)124 TEST_F(copy_propagation_test, test_swizzle_swizzle)
125 {
126 dst_reg a = dst_reg(v, glsl_type::vec4_type);
127 dst_reg b = dst_reg(v, glsl_type::vec4_type);
128 dst_reg c = dst_reg(v, glsl_type::vec4_type);
129
130 v->emit(v->ADD(a, src_reg(a), src_reg(a)));
131
132 v->emit(v->MOV(b, swizzle(src_reg(a), BRW_SWIZZLE4(SWIZZLE_Y,
133 SWIZZLE_Z,
134 SWIZZLE_W,
135 SWIZZLE_X))));
136
137 vec4_instruction *test_mov =
138 v->MOV(c, swizzle(src_reg(b), BRW_SWIZZLE4(SWIZZLE_Y,
139 SWIZZLE_Z,
140 SWIZZLE_W,
141 SWIZZLE_X)));
142 v->emit(test_mov);
143
144 copy_propagation(v);
145
146 EXPECT_EQ(test_mov->src[0].nr, a.nr);
147 EXPECT_EQ(test_mov->src[0].swizzle, BRW_SWIZZLE4(SWIZZLE_Z,
148 SWIZZLE_W,
149 SWIZZLE_X,
150 SWIZZLE_Y));
151 }
152
TEST_F(copy_propagation_test,test_swizzle_writemask)153 TEST_F(copy_propagation_test, test_swizzle_writemask)
154 {
155 dst_reg a = dst_reg(v, glsl_type::vec4_type);
156 dst_reg b = dst_reg(v, glsl_type::vec4_type);
157 dst_reg c = dst_reg(v, glsl_type::vec4_type);
158
159 v->emit(v->MOV(b, swizzle(src_reg(a), BRW_SWIZZLE4(SWIZZLE_X,
160 SWIZZLE_Y,
161 SWIZZLE_X,
162 SWIZZLE_Z))));
163
164 v->emit(v->MOV(writemask(a, WRITEMASK_XYZ), brw_imm_f(1.0f)));
165
166 vec4_instruction *test_mov =
167 v->MOV(c, swizzle(src_reg(b), BRW_SWIZZLE4(SWIZZLE_W,
168 SWIZZLE_W,
169 SWIZZLE_W,
170 SWIZZLE_W)));
171 v->emit(test_mov);
172
173 copy_propagation(v);
174
175 /* should not copy propagate */
176 EXPECT_EQ(test_mov->src[0].nr, b.nr);
177 EXPECT_EQ(test_mov->src[0].swizzle, BRW_SWIZZLE4(SWIZZLE_W,
178 SWIZZLE_W,
179 SWIZZLE_W,
180 SWIZZLE_W));
181 }
182