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
  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 brw_device_info *devinfo;
  38    struct gl_context *ctx;
  39    struct gl_shader_program *shader_prog;
  40    struct brw_vertex_program *vp;
  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                                   struct gl_shader_program *shader_prog)
  49       : vec4_visitor(compiler, NULL, NULL, NULL, NULL, shader_prog,
  50                      MESA_SHADER_VERTEX, NULL,
  51                      false /* no_spills */, -1)
  52    {
  53    }
  54
  55 protected:
  56    virtual dst_reg *make_reg_for_system_value(int location,
  57                                               const glsl_type *type)
  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_program_code()
  73    {
  74       unreachable("Not reached");
  75    }
  76
  77    virtual void emit_thread_end()
  78    {
  79       unreachable("Not reached");
  80    }
  81
  82    virtual void emit_urb_write_header(int mrf)
  83    {
  84       unreachable("Not reached");
  85    }
  86
  87    virtual vec4_instruction *emit_urb_write_opcode(bool complete)
  88    {
  89       unreachable("Not reached");
  90    }
  91 };
  92
  93
  94 void copy_propagation_test::SetUp()
  95 {
  96    ctx = (struct gl_context *)calloc(1, sizeof(*ctx));
  97    compiler = (struct brw_compiler *)calloc(1, sizeof(*compiler));
  98    devinfo = (struct brw_device_info *)calloc(1, sizeof(*devinfo));
  99    compiler->devinfo = devinfo;
 100
 101    vp = ralloc(NULL, struct brw_vertex_program);
 102
 103    shader_prog = ralloc(NULL, struct gl_shader_program);
 104
 105    v = new copy_propagation_vec4_visitor(compiler, shader_prog);
 106
 107    _mesa_init_vertex_program(ctx, &vp->program, GL_VERTEX_SHADER, 0);
 108
 109    devinfo->gen = 4;
 110 }
 111
 112 static void
 113 copy_propagation(vec4_visitor *v)
 114 {
 115    bool print = false;
 116
 117    if (print) {
 118       fprintf(stderr, "instructions before:\n");
 119       v->dump_instructions();
 120    }
 121
 122    v->calculate_cfg();
 123    v->opt_copy_propagation();
 124
 125    if (print) {
 126       fprintf(stderr, "instructions after:\n");
 127       v->dump_instructions();
 128    }
 129 }
 130
 131 TEST_F(copy_propagation_test, test_swizzle_swizzle)
 132 {
 133    dst_reg a = dst_reg(v, glsl_type::vec4_type);
 134    dst_reg b = dst_reg(v, glsl_type::vec4_type);
 135    dst_reg c = dst_reg(v, glsl_type::vec4_type);
 136
 137    v->emit(v->ADD(a, src_reg(a), src_reg(a)));
 138
 139    v->emit(v->MOV(b, swizzle(src_reg(a), BRW_SWIZZLE4(SWIZZLE_Y,
 140                                                       SWIZZLE_Z,
 141                                                       SWIZZLE_W,
 142                                                       SWIZZLE_X))));
 143
 144    vec4_instruction *test_mov =
 145       v->MOV(c, swizzle(src_reg(b), BRW_SWIZZLE4(SWIZZLE_Y,
 146                                                  SWIZZLE_Z,
 147                                                  SWIZZLE_W,
 148                                                  SWIZZLE_X)));
 149    v->emit(test_mov);
 150
 151    copy_propagation(v);
 152
 153    EXPECT_EQ(test_mov->src[0].reg, a.reg);
 154    EXPECT_EQ(test_mov->src[0].swizzle, BRW_SWIZZLE4(SWIZZLE_Z,
 155                                                     SWIZZLE_W,
 156                                                     SWIZZLE_X,
 157                                                     SWIZZLE_Y));
 158 }
 159
 160 TEST_F(copy_propagation_test, test_swizzle_writemask)
 161 {
 162    dst_reg a = dst_reg(v, glsl_type::vec4_type);
 163    dst_reg b = dst_reg(v, glsl_type::vec4_type);
 164    dst_reg c = dst_reg(v, glsl_type::vec4_type);
 165
 166    v->emit(v->MOV(b, swizzle(src_reg(a), BRW_SWIZZLE4(SWIZZLE_X,
 167                                                       SWIZZLE_Y,
 168                                                       SWIZZLE_X,
 169                                                       SWIZZLE_Z))));
 170
 171    v->emit(v->MOV(writemask(a, WRITEMASK_XYZ), src_reg(1.0f)));
 172
 173    vec4_instruction *test_mov =
 174       v->MOV(c, swizzle(src_reg(b), BRW_SWIZZLE4(SWIZZLE_W,
 175                                                  SWIZZLE_W,
 176                                                  SWIZZLE_W,
 177                                                  SWIZZLE_W)));
 178    v->emit(test_mov);
 179
 180    copy_propagation(v);
 181
 182    /* should not copy propagate */
 183    EXPECT_EQ(test_mov->src[0].reg, b.reg);
 184    EXPECT_EQ(test_mov->src[0].swizzle, BRW_SWIZZLE4(SWIZZLE_W,
 185                                                     SWIZZLE_W,
 186                                                     SWIZZLE_W,
 187                                                     SWIZZLE_W));
 188 }