test_vec4_copy_propagation.cpp revision 527f37199929932300acc1688d8160e1f3b1d753 
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 "brw_vs.h"
27#include "program/program.h"
28
29using namespace brw;
30
31int ret = 0;
32
33class copy_propagation_test : public ::testing::Test {
34   virtual void SetUp();
35
36public:
37   struct brw_compiler *compiler;
38   struct gen_device_info *devinfo;
39   struct gl_context *ctx;
40   struct gl_shader_program *shader_prog;
41   struct brw_vue_prog_data *prog_data;
42   vec4_visitor *v;
43};
44
45class copy_propagation_vec4_visitor : public vec4_visitor
46{
47public:
48   copy_propagation_vec4_visitor(struct brw_compiler *compiler,
49                                 nir_shader *shader,
50                                 struct brw_vue_prog_data *prog_data)
51      : vec4_visitor(compiler, NULL, NULL, prog_data, shader, NULL,
52                     false /* no_spills */, -1)
53   {
54      prog_data->dispatch_mode = DISPATCH_MODE_4X2_DUAL_OBJECT;
55   }
56
57protected:
58   virtual dst_reg *make_reg_for_system_value(int location)
59   {
60      unreachable("Not reached");
61   }
62
63   virtual void setup_payload()
64   {
65      unreachable("Not reached");
66   }
67
68   virtual void emit_prolog()
69   {
70      unreachable("Not reached");
71   }
72
73   virtual void emit_thread_end()
74   {
75      unreachable("Not reached");
76   }
77
78   virtual void emit_urb_write_header(int mrf)
79   {
80      unreachable("Not reached");
81   }
82
83   virtual vec4_instruction *emit_urb_write_opcode(bool complete)
84   {
85      unreachable("Not reached");
86   }
87};
88
89
90void copy_propagation_test::SetUp()
91{
92   ctx = (struct gl_context *)calloc(1, sizeof(*ctx));
93   compiler = (struct brw_compiler *)calloc(1, sizeof(*compiler));
94   devinfo = (struct gen_device_info *)calloc(1, sizeof(*devinfo));
95   prog_data = (struct brw_vue_prog_data *)calloc(1, sizeof(*prog_data));
96   compiler->devinfo = devinfo;
97
98   nir_shader *shader = nir_shader_create(NULL, MESA_SHADER_VERTEX, NULL);
99
100   v = new copy_propagation_vec4_visitor(compiler, shader, prog_data);
101
102   devinfo->gen = 4;
103}
104
105static void
106copy_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
124TEST_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
153TEST_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