src/mesa/drivers/dri/i965/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 "brw_vs.h"
  27 #include "program/program.h"
  28
  29 using namespace brw;
  30
  31 int ret = 0;
  32
  33 class copy_propagation_test : public ::testing::Test {
  34    virtual void SetUp();
  35
  36 public:
  37    struct brw_compiler *compiler;
  38    struct brw_device_info *devinfo;
  39    struct gl_context *ctx;
  40    struct gl_shader_program *shader_prog;
  41    struct brw_vertex_program *vp;
  42    struct brw_vue_prog_data *prog_data;
  43    vec4_visitor *v;
  44 };
  45
  46 class copy_propagation_vec4_visitor : public vec4_visitor
  47 {
  48 public:
  49    copy_propagation_vec4_visitor(struct brw_compiler *compiler,
  50                                  nir_shader *shader,
  51                                  struct brw_vue_prog_data *prog_data)
  52       : vec4_visitor(compiler, NULL, NULL, prog_data, shader, NULL,
  53                      false /* no_spills */, -1)
  54    {
  55       prog_data->dispatch_mode = DISPATCH_MODE_4X2_DUAL_OBJECT;
  56    }
  57
  58 protected:
  59    virtual dst_reg *make_reg_for_system_value(int location,
  60                                               const glsl_type *type)
  61    {
  62       unreachable("Not reached");
  63    }
  64
  65    virtual void setup_payload()
  66    {
  67       unreachable("Not reached");
  68    }
  69
  70    virtual void emit_prolog()
  71    {
  72       unreachable("Not reached");
  73    }
  74
  75    virtual void emit_thread_end()
  76    {
  77       unreachable("Not reached");
  78    }
  79
  80    virtual void emit_urb_write_header(int mrf)
  81    {
  82       unreachable("Not reached");
  83    }
  84
  85    virtual vec4_instruction *emit_urb_write_opcode(bool complete)
  86    {
  87       unreachable("Not reached");
  88    }
  89 };
  90
  91
  92 void copy_propagation_test::SetUp()
  93 {
  94    ctx = (struct gl_context *)calloc(1, sizeof(*ctx));
  95    compiler = (struct brw_compiler *)calloc(1, sizeof(*compiler));
  96    devinfo = (struct brw_device_info *)calloc(1, sizeof(*devinfo));
  97    prog_data = (struct brw_vue_prog_data *)calloc(1, sizeof(*prog_data));
  98    compiler->devinfo = devinfo;
  99
 100    vp = ralloc(NULL, struct brw_vertex_program);
 101
 102    nir_shader *shader = nir_shader_create(NULL, MESA_SHADER_VERTEX, NULL);
 103
 104    v = new copy_propagation_vec4_visitor(compiler, shader, prog_data);
 105
 106    _mesa_init_gl_program(&vp->program.Base, GL_VERTEX_SHADER, 0);
 107
 108    devinfo->gen = 4;
 109 }
 110
 111 static void
 112 copy_propagation(vec4_visitor *v)
 113 {
 114    bool print = false;
 115
 116    if (print) {
 117       fprintf(stderr, "instructions before:\n");
 118       v->dump_instructions();
 119    }
 120
 121    v->calculate_cfg();
 122    v->opt_copy_propagation();
 123
 124    if (print) {
 125       fprintf(stderr, "instructions after:\n");
 126       v->dump_instructions();
 127    }
 128 }
 129
 130 TEST_F(copy_propagation_test, test_swizzle_swizzle)
 131 {
 132    dst_reg a = dst_reg(v, glsl_type::vec4_type);
 133    dst_reg b = dst_reg(v, glsl_type::vec4_type);
 134    dst_reg c = dst_reg(v, glsl_type::vec4_type);
 135
 136    v->emit(v->ADD(a, src_reg(a), src_reg(a)));
 137
 138    v->emit(v->MOV(b, swizzle(src_reg(a), BRW_SWIZZLE4(SWIZZLE_Y,
 139                                                       SWIZZLE_Z,
 140                                                       SWIZZLE_W,
 141                                                       SWIZZLE_X))));
 142
 143    vec4_instruction *test_mov =
 144       v->MOV(c, swizzle(src_reg(b), BRW_SWIZZLE4(SWIZZLE_Y,
 145                                                  SWIZZLE_Z,
 146                                                  SWIZZLE_W,
 147                                                  SWIZZLE_X)));
 148    v->emit(test_mov);
 149
 150    copy_propagation(v);
 151
 152    EXPECT_EQ(test_mov->src[0].nr, a.nr);
 153    EXPECT_EQ(test_mov->src[0].swizzle, BRW_SWIZZLE4(SWIZZLE_Z,
 154                                                     SWIZZLE_W,
 155                                                     SWIZZLE_X,
 156                                                     SWIZZLE_Y));
 157 }
 158
 159 TEST_F(copy_propagation_test, test_swizzle_writemask)
 160 {
 161    dst_reg a = dst_reg(v, glsl_type::vec4_type);
 162    dst_reg b = dst_reg(v, glsl_type::vec4_type);
 163    dst_reg c = dst_reg(v, glsl_type::vec4_type);
 164
 165    v->emit(v->MOV(b, swizzle(src_reg(a), BRW_SWIZZLE4(SWIZZLE_X,
 166                                                       SWIZZLE_Y,
 167                                                       SWIZZLE_X,
 168                                                       SWIZZLE_Z))));
 169
 170    v->emit(v->MOV(writemask(a, WRITEMASK_XYZ), brw_imm_f(1.0f)));
 171
 172    vec4_instruction *test_mov =
 173       v->MOV(c, swizzle(src_reg(b), BRW_SWIZZLE4(SWIZZLE_W,
 174                                                  SWIZZLE_W,
 175                                                  SWIZZLE_W,
 176                                                  SWIZZLE_W)));
 177    v->emit(test_mov);
 178
 179    copy_propagation(v);
 180
 181    /* should not copy propagate */
 182    EXPECT_EQ(test_mov->src[0].nr, b.nr);
 183    EXPECT_EQ(test_mov->src[0].swizzle, BRW_SWIZZLE4(SWIZZLE_W,
 184                                                     SWIZZLE_W,
 185                                                     SWIZZLE_W,
 186                                                     SWIZZLE_W));
 187 }