kc3-lang/angle/src/tests/test_utils/ConstantFoldingTest.h

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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/test_utils/ConstantFoldingTest.h

• //
  // Copyright 2016 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.
  //
  // ConstantFoldingTest.h:
  //   Utilities for constant folding tests.
  //
  
  #ifndef TESTS_TEST_UTILS_CONSTANTFOLDINGTEST_H_
  #define TESTS_TEST_UTILS_CONSTANTFOLDINGTEST_H_
  
  #include <vector>
  
  #include "common/mathutil.h"
  #include "compiler/translator/tree_util/FindMain.h"
  #include "compiler/translator/tree_util/FindSymbolNode.h"
  #include "compiler/translator/tree_util/IntermTraverse.h"
  #include "tests/test_utils/ShaderCompileTreeTest.h"
  
  namespace sh
  {
  
  class TranslatorESSL;
  
  template <typename T>
  class ConstantFinder : public TIntermTraverser
  {
    public:
      ConstantFinder(const std::vector<T> &constantVector)
          : TIntermTraverser(true, false, false),
            mConstantVector(constantVector),
            mFaultTolerance(T()),
            mFound(false)
      {}
  
      ConstantFinder(const std::vector<T> &constantVector, const T &faultTolerance)
          : TIntermTraverser(true, false, false),
            mConstantVector(constantVector),
            mFaultTolerance(faultTolerance),
            mFound(false)
      {}
  
      ConstantFinder(const T &value)
          : TIntermTraverser(true, false, false), mFaultTolerance(T()), mFound(false)
      {
          mConstantVector.push_back(value);
      }
  
      void visitConstantUnion(TIntermConstantUnion *node)
      {
          if (node->getType().getObjectSize() == mConstantVector.size())
          {
              bool found = true;
              for (size_t i = 0; i < mConstantVector.size(); i++)
              {
                  if (!isEqual(node->getConstantValue()[i], mConstantVector[i]))
                  {
                      found = false;
                      break;
                  }
              }
              if (found)
              {
                  mFound = found;
              }
          }
      }
  
      bool found() const { return mFound; }
  
    private:
      bool isEqual(const TConstantUnion &node, const float &value) const
      {
          if (node.getType() != EbtFloat)
          {
              return false;
          }
          if (value == std::numeric_limits<float>::infinity())
          {
              return gl::isInf(node.getFConst()) && node.getFConst() > 0;
          }
          else if (value == -std::numeric_limits<float>::infinity())
          {
              return gl::isInf(node.getFConst()) && node.getFConst() < 0;
          }
          else if (gl::isNaN(value))
          {
              // All NaNs are treated as equal.
              return gl::isNaN(node.getFConst());
          }
          return mFaultTolerance >= fabsf(node.getFConst() - value);
      }
  
      bool isEqual(const TConstantUnion &node, const int &value) const
      {
          if (node.getType() != EbtInt)
          {
              return false;
          }
          ASSERT(mFaultTolerance < std::numeric_limits<int>::max());
          // abs() returns 0 at least on some platforms when the minimum int value is passed in (it
          // doesn't have a positive counterpart).
          return mFaultTolerance >= abs(node.getIConst() - value) &&
                 (node.getIConst() - value) != std::numeric_limits<int>::min();
      }
  
      bool isEqual(const TConstantUnion &node, const unsigned int &value) const
      {
          if (node.getType() != EbtUInt)
          {
              return false;
          }
          ASSERT(mFaultTolerance < static_cast<unsigned int>(std::numeric_limits<int>::max()));
          return static_cast<int>(mFaultTolerance) >=
                     abs(static_cast<int>(node.getUConst() - value)) &&
                 static_cast<int>(node.getUConst() - value) != std::numeric_limits<int>::min();
      }
  
      bool isEqual(const TConstantUnion &node, const bool &value) const
      {
          if (node.getType() != EbtBool)
          {
              return false;
          }
          return node.getBConst() == value;
      }
  
      std::vector<T> mConstantVector;
      T mFaultTolerance;
      bool mFound;
  };
  
  class ConstantFoldingTest : public ShaderCompileTreeTest
  {
    public:
      ConstantFoldingTest() {}
  
    protected:
      ::GLenum getShaderType() const override { return GL_FRAGMENT_SHADER; }
      ShShaderSpec getShaderSpec() const override { return SH_GLES3_1_SPEC; }
  
      template <typename T>
      bool constantFoundInAST(T constant)
      {
          ConstantFinder<T> finder(constant);
          mASTRoot->traverse(&finder);
          return finder.found();
      }
  
      template <typename T>
      bool constantVectorFoundInAST(const std::vector<T> &constantVector)
      {
          ConstantFinder<T> finder(constantVector);
          mASTRoot->traverse(&finder);
          return finder.found();
      }
  
      template <typename T>
      bool constantColumnMajorMatrixFoundInAST(const std::vector<T> &constantMatrix)
      {
          return constantVectorFoundInAST(constantMatrix);
      }
  
      template <typename T>
      bool constantVectorNearFoundInAST(const std::vector<T> &constantVector, const T &faultTolerance)
      {
          ConstantFinder<T> finder(constantVector, faultTolerance);
          mASTRoot->traverse(&finder);
          return finder.found();
      }
  
      bool symbolFoundInAST(const char *symbolName)
      {
          return FindSymbolNode(mASTRoot, ImmutableString(symbolName)) != nullptr;
      }
  
      bool symbolFoundInMain(const char *symbolName)
      {
          return FindSymbolNode(FindMain(mASTRoot), ImmutableString(symbolName)) != nullptr;
      }
  };
  
  class ConstantFoldingExpressionTest : public ConstantFoldingTest
  {
    public:
      ConstantFoldingExpressionTest() {}
  
      void evaluateFloat(const std::string &floatExpression);
      void evaluateInt(const std::string &intExpression);
      void evaluateUint(const std::string &uintExpression);
  };
  
  }  // namespace sh
  
  #endif  // TESTS_TEST_UTILS_CONSTANTFOLDINGTEST_H_