PrunePureLiteralStatements_test.cpp

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Author : Olli Etuaho
Date : 2017-11-14 15:03:14
Hash : 7caa80e7
Message : Edit tests to reference temporary variables The shader translator is intended to prune unreferenced variables in the future. To maintain test coverage when this is done, most tests that used to have unreferenced GLSL locals and globals are edited to use built-ins or reference the necessary variables instead. BUG=angleproject:2166 TEST=angle_unittests, angle_end2end_tests Change-Id: I3964e7a80d52fc04a95f57e73da6095e433095e8 Reviewed-on: https://chromium-review.googlesource.com/768740 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

src/tests/compiler_tests/PrunePureLiteralStatements_test.cpp

//
// Copyright (c) 2017 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// PrunePureLiteralStatements_test.cpp:
//   Tests for pruning literal statements.
//

#include "angle_gl.h"
#include "gtest/gtest.h"
#include "tests/test_utils/compiler_test.h"

using namespace sh;

namespace
{

class PrunePureLiteralStatementsTest : public MatchOutputCodeTest
{
  public:
    // The PrunePureLiteralStatements pass is used when outputting ESSL
    PrunePureLiteralStatementsTest() : MatchOutputCodeTest(GL_FRAGMENT_SHADER, 0, SH_ESSL_OUTPUT) {}
};

// Most basic test for the pruning
TEST_F(PrunePureLiteralStatementsTest, FloatLiteralStatement)
{
    const std::string shaderString =
        R"(precision mediump float;
        void main()
        {
           float f = 41.0;
           42.0;
           gl_FragColor = vec4(f);
        })";
    compile(shaderString);
    ASSERT_TRUE(foundInCode("41"));
    ASSERT_TRUE(notFoundInCode("42"));
}

// Test the pruning works for constructed types too
TEST_F(PrunePureLiteralStatementsTest, ConstructorLiteralStatement)
{
    const std::string shaderString =
        R"(precision mediump float;
        void main()
        {
            vec2 f = vec2(41.0, 41.0);
            vec2(42.0, 42.0);
            gl_FragColor = vec4(f, 0.0, 0.0);
        })";
    compile(shaderString);
    ASSERT_TRUE(foundInCode("41"));
    ASSERT_TRUE(notFoundInCode("42"));
}

// Test the pruning works when the literal is a (non-trivial) expression
TEST_F(PrunePureLiteralStatementsTest, ExpressionLiteralStatement)
{
    const std::string shaderString =
        "precision mediump float;\n"
        "void main()\n"
        "{\n"
        "   vec2(21.0, 21.0) + vec2(21.0, 21.0);\n"
        "}\n";
    compile(shaderString);
    ASSERT_TRUE(notFoundInCode("21"));
    ASSERT_TRUE(notFoundInCode("42"));
}

// Test that the pruning happens in the for-loop expression too
TEST_F(PrunePureLiteralStatementsTest, ForLoopLiteralExpression)
{
    const std::string shaderString =
        "precision mediump float;\n"
        "void main()\n"
        "{\n"
        "    for (;; vec2(42.0, 42.0)) {}\n"
        "}\n";
    compile(shaderString);
    ASSERT_TRUE(notFoundInCode("42"));
}

// Test that the pruning correctly handles the pruning inside switch statements - for a switch with
// one empty case.
TEST_F(PrunePureLiteralStatementsTest, SwitchLiteralExpressionEmptyCase)
{
    const std::string shaderString =
        "#version 300 es\n"
        "precision mediump float;\n"
        "void main()\n"
        "{\n"
        "    switch(1)\n"
        "    {\n"
        "      default:\n"
        "        42;\n"
        "    }\n"
        "}\n";
    compile(shaderString);
    ASSERT_TRUE(notFoundInCode("default"));
    ASSERT_TRUE(notFoundInCode("42"));
}

// Test that the pruning correctly handles the pruning inside switch statements - for a switch with
// multiple cases.
TEST_F(PrunePureLiteralStatementsTest, SwitchLiteralExpressionEmptyCases)
{
    const std::string shaderString =
        "#version 300 es\n"
        "precision mediump float;\n"
        "void main()\n"
        "{\n"
        "    switch(1)\n"
        "    {\n"
        "      case 1:\n"
        "      case 2:\n"
        "      default:\n"
        "        42;\n"
        "    }\n"
        "}\n";
    compile(shaderString);
    ASSERT_TRUE(notFoundInCode("default"));
    ASSERT_TRUE(notFoundInCode("case"));
    ASSERT_TRUE(notFoundInCode("42"));
}

// Test that the pruning correctly handles the pruning inside switch statements - only cases at the
// end are deleted
TEST_F(PrunePureLiteralStatementsTest, SwitchLiteralExpressionOnlyLastCase)
{
    const std::string shaderString =
        "#version 300 es\n"
        "precision mediump float;\n"
        "void main()\n"
        "{\n"
        "    switch(1)\n"
        "    {\n"
        "      case 1:\n"
        "      default:\n"
        "        42;\n"
        "        break;\n"
        "    }\n"
        "}\n";
    compile(shaderString);
    ASSERT_TRUE(foundInCode("default"));
    ASSERT_TRUE(foundInCode("case"));
    ASSERT_TRUE(notFoundInCode("42"));
}

// Test that the pruning correctly handles the pruning inside switch statements - pruning isn't stopped by literal statements
TEST_F(PrunePureLiteralStatementsTest, SwitchLiteralExpressionLiteralDoesntStop)
{
    const std::string shaderString =
        "#version 300 es\n"
        "precision mediump float;\n"
        "void main()\n"
        "{\n"
        "    switch(1)\n"
        "    {\n"
        "      case 1:\n"
        "        42;\n"
        "      case 2:\n"
        "        43;\n"
        "    }\n"
        "}\n";
    compile(shaderString);
    ASSERT_TRUE(notFoundInCode("case"));
    ASSERT_TRUE(notFoundInCode("42"));
    ASSERT_TRUE(notFoundInCode("43"));
}

}  // namespace

kc3-lang/angle/src/tests/compiler_tests/PrunePureLiteralStatements_test.cpp

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kc3-lang/angle /src/tests/compiler_tests/PrunePureLiteralStatements_test.cpp