src/intel/compiler/test_vec4_copy_propagation.cpp

   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:
  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:
  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
  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
 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
 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
 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 }