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

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• Hash : 568caaa0
  Author :
  Date : 2024-07-23T15:07:59
  

  Prune switch(constant) with no matching case
  
  Bug: chromium:350528343
  Change-Id: Iabb475b230f22086de482bbdcf2fa00b0d986622
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5735815
  Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

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• src/tests/compiler_tests/PruneNoOps_test.cpp

• //
  // Copyright 2024 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.
  //
  // PruneNoOps_test.cpp:
  //   Tests for pruning no-op statements.
  //
  
  #include "GLSLANG/ShaderLang.h"
  #include "angle_gl.h"
  #include "gtest/gtest.h"
  #include "tests/test_utils/compiler_test.h"
  
  using namespace sh;
  
  namespace
  {
  
  class PruneNoOpsTest : public MatchOutputCodeTest
  {
    public:
      PruneNoOpsTest() : MatchOutputCodeTest(GL_FRAGMENT_SHADER, SH_GLSL_COMPATIBILITY_OUTPUT) {}
  };
  
  // Test that a switch statement with a constant expression without a matching case is pruned.
  TEST_F(PruneNoOpsTest, SwitchStatementWithConstantExpressionNoMatchingCase)
  {
      const std::string shaderString = R"(#version 300 es
  precision mediump float;
  out vec4 color;
  
  void main(void)
  {
      switch (10)
      {
          case 0:
              color = vec4(0);
              break;
          case 1:
              color = vec4(1);
              break;
      }
  })";
      compile(shaderString);
      ASSERT_TRUE(notFoundInCode("switch"));
      ASSERT_TRUE(notFoundInCode("case"));
  }
  
  // Test that a switch statement with a constant expression with a default is not pruned.
  TEST_F(PruneNoOpsTest, SwitchStatementWithConstantExpressionWithDefault)
  {
      const std::string shaderString = R"(#version 300 es
  precision mediump float;
  out vec4 color;
  
  void main(void)
  {
      switch (10)
      {
          case 0:
              color = vec4(0);
              break;
          case 1:
              color = vec4(1);
              break;
          default:
              color = vec4(0.5);
              break;
      }
  })";
      compile(shaderString);
      ASSERT_TRUE(foundInCode("switch"));
      ASSERT_TRUE(foundInCode("case"));
  }
  
  // Test that a switch statement with a constant expression with a matching case is not pruned.
  TEST_F(PruneNoOpsTest, SwitchStatementWithConstantExpressionWithMatchingCase)
  {
      const std::string shaderString = R"(#version 300 es
  precision mediump float;
  out vec4 color;
  
  void main(void)
  {
      switch (10)
      {
          case 0:
              color = vec4(0);
              break;
          case 10:
              color = vec4(1);
              break;
      }
  })";
      compile(shaderString);
      ASSERT_TRUE(foundInCode("switch"));
      ASSERT_TRUE(foundInCode("case"));
  }
  
  }  // namespace
  

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