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

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• Author : Shahbaz Youssefi
  Date : 2021-04-07 11:36:06
  Hash : 2feb3db5
  Message : Remove unused translator option bit SH_DONT_PRUNE_UNUSED_FUNCTIONS was only used by tests, and never used by ANGLE or chromium. Bug: angleproject:4889 Change-Id: I4926f86125e69b07e9d4d95134b7b70522e0d64f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2607491 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>

• src/tests/compiler_tests/PruneUnusedFunctions_test.cpp

• //
  // Copyright 2015 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.
  //
  // PruneUnusedFunctions_test.cpp:
  //   Test for the pruning of unused functions
  //
  
  #include "GLSLANG/ShaderLang.h"
  #include "angle_gl.h"
  #include "gtest/gtest.h"
  #include "tests/test_utils/compiler_test.h"
  
  using namespace sh;
  
  namespace
  {
  
  class PruneUnusedFunctionsTest : public MatchOutputCodeTest
  {
    public:
      PruneUnusedFunctionsTest() : MatchOutputCodeTest(GL_FRAGMENT_SHADER, 0, SH_ESSL_OUTPUT) {}
  
    protected:
      void compile(const std::string &shaderString)
      {
          int compilationFlags = SH_VARIABLES;
          MatchOutputCodeTest::compile(shaderString, compilationFlags);
      }
  };
  
  // Check that unused function and prototypes are removed iff the options is set
  TEST_F(PruneUnusedFunctionsTest, UnusedFunctionAndProto)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "float unused(float a);\n"
          "void main() {\n"
          "    gl_FragColor = vec4(1.0);\n"
          "}\n"
          "float unused(float a) {\n"
          "    return a;\n"
          "}\n";
      compile(shaderString);
      EXPECT_TRUE(notFoundInCode("unused("));
      EXPECT_TRUE(foundInCode("main(", 1));
  }
  
  // Check that unimplemented prototypes are removed iff the options is set
  TEST_F(PruneUnusedFunctionsTest, UnimplementedPrototype)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "float unused(float a);\n"
          "void main() {\n"
          "    gl_FragColor = vec4(1.0);\n"
          "}\n";
      compile(shaderString);
      EXPECT_TRUE(notFoundInCode("unused("));
      EXPECT_TRUE(foundInCode("main(", 1));
  }
  
  // Check that used functions are not pruned (duh)
  TEST_F(PruneUnusedFunctionsTest, UsedFunction)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "float used(float a);\n"
          "void main() {\n"
          "    gl_FragColor = vec4(used(1.0));\n"
          "}\n"
          "float used(float a) {\n"
          "    return a;\n"
          "}\n";
      compile(shaderString);
      EXPECT_TRUE(foundInCode("used(", 3));
      EXPECT_TRUE(foundInCode("main(", 1));
  }
  
  }  // namespace