PrunePureLiteralStatements_test.cpp

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/tests/compiler_tests/PrunePureLiteralStatements_test.cpp

//
// Copyright 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