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
28using namespace brw;
29
30class copy_propagation_test : public ::testing::Test {
31   virtual void SetUp();
32   virtual void TearDown();
33
34public:
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
43class copy_propagation_vec4_visitor : public vec4_visitor
44{
45public:
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
56protected:
57   virtual dst_reg *make_reg_for_system_value(int /* location */)
58   {
59      unreachable("Not reached");
60   }
61
62   virtual void setup_payload()
63   {
64      unreachable("Not reached");
65   }
66
67   virtual void emit_prolog()
68   {
69      unreachable("Not reached");
70   }
71
72   virtual void emit_thread_end()
73   {
74      unreachable("Not reached");
75   }
76
77   virtual void emit_urb_write_header(int /* mrf */)
78   {
79      unreachable("Not reached");
80   }
81
82   virtual vec4_instruction *emit_urb_write_opcode(bool /* complete */)
83   {
84      unreachable("Not reached");
85   }
86};
87
88
89void 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
106void copy_propagation_test::TearDown()
107{
108   delete v;
109   v = NULL;
110
111   ralloc_free(ctx);
112   ctx = NULL;
113}
114
115
116static void
117copy_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
135TEST_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
164TEST_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