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 class copy_propagation_test : public ::testing::Test {
31 virtual void SetUp();
32 virtual void TearDown();
33
34 public:
35 struct brw_compiler *compiler;
36 struct intel_device_info *devinfo;
37 void *ctx;
38 struct gl_shader_program *shader_prog;
39 struct brw_vue_prog_data *prog_data;
40 vec4_visitor *v;
41 };
42
43 class copy_propagation_vec4_visitor : public vec4_visitor
44 {
45 public:
copy_propagation_vec4_visitor(struct brw_compiler * compiler,void * mem_ctx,nir_shader * shader,struct brw_vue_prog_data * prog_data)46 copy_propagation_vec4_visitor(struct brw_compiler *compiler,
47 void *mem_ctx,
48 nir_shader *shader,
49 struct brw_vue_prog_data *prog_data)
50 : vec4_visitor(compiler, NULL, NULL, prog_data, shader, mem_ctx,
51 false /* no_spills */, -1, false)
52 {
53 prog_data->dispatch_mode = DISPATCH_MODE_4X2_DUAL_OBJECT;
54 }
55
56 protected:
make_reg_for_system_value(int)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)77 virtual void emit_urb_write_header(int /* mrf */)
78 {
79 unreachable("Not reached");
80 }
81
emit_urb_write_opcode(bool)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 = ralloc_context(NULL);
92 compiler = rzalloc(ctx, struct brw_compiler);
93 devinfo = rzalloc(ctx, struct intel_device_info);
94 compiler->devinfo = devinfo;
95
96 prog_data = ralloc(ctx, struct brw_vue_prog_data);
97 nir_shader *shader =
98 nir_shader_create(ctx, MESA_SHADER_VERTEX, NULL, NULL);
99
100 v = new copy_propagation_vec4_visitor(compiler, ctx, shader, prog_data);
101
102 devinfo->ver = 4;
103 devinfo->verx10 = devinfo->ver * 10;
104 }
105
TearDown()106 void copy_propagation_test::TearDown()
107 {
108 delete v;
109 v = NULL;
110
111 ralloc_free(ctx);
112 ctx = NULL;
113 }
114
115
116 static void
copy_propagation(vec4_visitor * v)117 copy_propagation(vec4_visitor *v)
118 {
119 const bool print = getenv("TEST_DEBUG");
120
121 if (print) {
122 fprintf(stderr, "instructions before:\n");
123 v->dump_instructions();
124 }
125
126 v->calculate_cfg();
127 v->opt_copy_propagation();
128
129 if (print) {
130 fprintf(stderr, "instructions after:\n");
131 v->dump_instructions();
132 }
133 }
134
TEST_F(copy_propagation_test,test_swizzle_swizzle)135 TEST_F(copy_propagation_test, test_swizzle_swizzle)
136 {
137 dst_reg a = dst_reg(v, glsl_type::vec4_type);
138 dst_reg b = dst_reg(v, glsl_type::vec4_type);
139 dst_reg c = dst_reg(v, glsl_type::vec4_type);
140
141 v->emit(v->ADD(a, src_reg(a), src_reg(a)));
142
143 v->emit(v->MOV(b, swizzle(src_reg(a), BRW_SWIZZLE4(SWIZZLE_Y,
144 SWIZZLE_Z,
145 SWIZZLE_W,
146 SWIZZLE_X))));
147
148 vec4_instruction *test_mov =
149 v->MOV(c, swizzle(src_reg(b), BRW_SWIZZLE4(SWIZZLE_Y,
150 SWIZZLE_Z,
151 SWIZZLE_W,
152 SWIZZLE_X)));
153 v->emit(test_mov);
154
155 copy_propagation(v);
156
157 EXPECT_EQ(test_mov->src[0].nr, a.nr);
158 EXPECT_EQ(test_mov->src[0].swizzle, BRW_SWIZZLE4(SWIZZLE_Z,
159 SWIZZLE_W,
160 SWIZZLE_X,
161 SWIZZLE_Y));
162 }
163
TEST_F(copy_propagation_test,test_swizzle_writemask)164 TEST_F(copy_propagation_test, test_swizzle_writemask)
165 {
166 dst_reg a = dst_reg(v, glsl_type::vec4_type);
167 dst_reg b = dst_reg(v, glsl_type::vec4_type);
168 dst_reg c = dst_reg(v, glsl_type::vec4_type);
169
170 v->emit(v->MOV(b, swizzle(src_reg(a), BRW_SWIZZLE4(SWIZZLE_X,
171 SWIZZLE_Y,
172 SWIZZLE_X,
173 SWIZZLE_Z))));
174
175 v->emit(v->MOV(writemask(a, WRITEMASK_XYZ), brw_imm_f(1.0f)));
176
177 vec4_instruction *test_mov =
178 v->MOV(c, swizzle(src_reg(b), BRW_SWIZZLE4(SWIZZLE_W,
179 SWIZZLE_W,
180 SWIZZLE_W,
181 SWIZZLE_W)));
182 v->emit(test_mov);
183
184 copy_propagation(v);
185
186 /* should not copy propagate */
187 EXPECT_EQ(test_mov->src[0].nr, b.nr);
188 EXPECT_EQ(test_mov->src[0].swizzle, BRW_SWIZZLE4(SWIZZLE_W,
189 SWIZZLE_W,
190 SWIZZLE_W,
191 SWIZZLE_W));
192 }
193