kc3-lang/angle/src/compiler/translator/TranslatorHLSL.cpp

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• Hash : 4dd06d5d
  Author :
  Date : 2017-07-05T12:41:06
  

  Set proper symbol ids on temporary symbol nodes
  
  Temporary symbols used to all have symbol id 0. Now they get assigned
  unique symbol ids. This makes it possible to keep track of them
  according to the symbol id instead of their name, paving way to more
  robust AST handling in the future.
  
  BUG=angleproject:1490
  TEST=angle_unittests
  
  Change-Id: I292e2e483cc39173524fd30a30b48c4c808442e5
  Reviewed-on: https://chromium-review.googlesource.com/559335
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  

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• src/compiler/translator/TranslatorHLSL.cpp

• //
  // Copyright (c) 2002-2013 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.
  //
  
  #include "compiler/translator/TranslatorHLSL.h"
  
  #include "compiler/translator/AddDefaultReturnStatements.h"
  #include "compiler/translator/ArrayReturnValueToOutParameter.h"
  #include "compiler/translator/BreakVariableAliasingInInnerLoops.h"
  #include "compiler/translator/EmulatePrecision.h"
  #include "compiler/translator/ExpandIntegerPowExpressions.h"
  #include "compiler/translator/IntermNodePatternMatcher.h"
  #include "compiler/translator/OutputHLSL.h"
  #include "compiler/translator/RemoveDynamicIndexing.h"
  #include "compiler/translator/RewriteElseBlocks.h"
  #include "compiler/translator/RewriteTexelFetchOffset.h"
  #include "compiler/translator/RewriteUnaryMinusOperatorInt.h"
  #include "compiler/translator/SeparateArrayInitialization.h"
  #include "compiler/translator/SeparateDeclarations.h"
  #include "compiler/translator/SeparateExpressionsReturningArrays.h"
  #include "compiler/translator/SimplifyLoopConditions.h"
  #include "compiler/translator/SplitSequenceOperator.h"
  #include "compiler/translator/UnfoldShortCircuitToIf.h"
  
  namespace sh
  {
  
  TranslatorHLSL::TranslatorHLSL(sh::GLenum type, ShShaderSpec spec, ShShaderOutput output)
      : TCompiler(type, spec, output)
  {
  }
  
  void TranslatorHLSL::translate(TIntermBlock *root, ShCompileOptions compileOptions)
  {
      const ShBuiltInResources &resources = getResources();
      int numRenderTargets                = resources.EXT_draw_buffers ? resources.MaxDrawBuffers : 1;
  
      sh::AddDefaultReturnStatements(root);
  
      // Note that SimplifyLoopConditions needs to be run before any other AST transformations that
      // may need to generate new statements from loop conditions or loop expressions.
      SimplifyLoopConditions(root,
                             IntermNodePatternMatcher::kExpressionReturningArray |
                                 IntermNodePatternMatcher::kUnfoldedShortCircuitExpression |
                                 IntermNodePatternMatcher::kDynamicIndexingOfVectorOrMatrixInLValue |
                                 IntermNodePatternMatcher::kMultiDeclaration,
                             getTemporaryId(), getSymbolTable(), getShaderVersion());
  
      // Note that separate declarations need to be run before other AST transformations that
      // generate new statements from expressions.
      SeparateDeclarations(root);
  
      SplitSequenceOperator(root,
                            IntermNodePatternMatcher::kExpressionReturningArray |
                                IntermNodePatternMatcher::kUnfoldedShortCircuitExpression |
                                IntermNodePatternMatcher::kDynamicIndexingOfVectorOrMatrixInLValue,
                            getTemporaryId(), getSymbolTable(), getShaderVersion());
  
      // Note that SeparateDeclarations needs to be run before UnfoldShortCircuitToIf.
      UnfoldShortCircuitToIf(root, getTemporaryId());
  
      SeparateExpressionsReturningArrays(root, getTemporaryId());
  
      // Note that SeparateDeclarations needs to be run before SeparateArrayInitialization.
      SeparateArrayInitialization(root);
  
      // HLSL doesn't support arrays as return values, we'll need to make functions that have an array
      // as a return value to use an out parameter to transfer the array data instead.
      ArrayReturnValueToOutParameter(root, getTemporaryId());
  
      if (!shouldRunLoopAndIndexingValidation(compileOptions))
      {
          // HLSL doesn't support dynamic indexing of vectors and matrices.
          RemoveDynamicIndexing(root, getTemporaryId(), getSymbolTable(), getShaderVersion());
      }
  
      // Work around D3D9 bug that would manifest in vertex shaders with selection blocks which
      // use a vertex attribute as a condition, and some related computation in the else block.
      if (getOutputType() == SH_HLSL_3_0_OUTPUT && getShaderType() == GL_VERTEX_SHADER)
      {
          sh::RewriteElseBlocks(root, getTemporaryId());
      }
  
      // Work around an HLSL compiler frontend aliasing optimization bug.
      // TODO(cwallez) The date is 2016-08-25, Microsoft said the bug would be fixed
      // in the next release of d3dcompiler.dll, it would be nice to detect the DLL
      // version and only apply the workaround if it is too old.
      sh::BreakVariableAliasingInInnerLoops(root);
  
      bool precisionEmulation =
          getResources().WEBGL_debug_shader_precision && getPragma().debugShaderPrecision;
  
      if (precisionEmulation)
      {
          EmulatePrecision emulatePrecision(getSymbolTable(), getShaderVersion());
          root->traverse(&emulatePrecision);
          emulatePrecision.updateTree();
          emulatePrecision.writeEmulationHelpers(getInfoSink().obj, getShaderVersion(),
                                                 getOutputType());
      }
  
      if ((compileOptions & SH_EXPAND_SELECT_HLSL_INTEGER_POW_EXPRESSIONS) != 0)
      {
          sh::ExpandIntegerPowExpressions(root, getTemporaryId());
      }
  
      if ((compileOptions & SH_REWRITE_TEXELFETCHOFFSET_TO_TEXELFETCH) != 0)
      {
          sh::RewriteTexelFetchOffset(root, getSymbolTable(), getShaderVersion());
      }
  
      if (((compileOptions & SH_REWRITE_INTEGER_UNARY_MINUS_OPERATOR) != 0) &&
          getShaderType() == GL_VERTEX_SHADER)
      {
          sh::RewriteUnaryMinusOperatorInt(root);
      }
  
      sh::OutputHLSL outputHLSL(getShaderType(), getShaderVersion(), getExtensionBehavior(),
                                getSourcePath(), getOutputType(), numRenderTargets, getUniforms(),
                                compileOptions);
  
      outputHLSL.output(root, getInfoSink().obj);
  
      mInterfaceBlockRegisterMap = outputHLSL.getInterfaceBlockRegisterMap();
      mUniformRegisterMap        = outputHLSL.getUniformRegisterMap();
  }
  
  bool TranslatorHLSL::shouldFlattenPragmaStdglInvariantAll()
  {
      // Not necessary when translating to HLSL.
      return false;
  }
  
  bool TranslatorHLSL::hasInterfaceBlock(const std::string &interfaceBlockName) const
  {
      return (mInterfaceBlockRegisterMap.count(interfaceBlockName) > 0);
  }
  
  unsigned int TranslatorHLSL::getInterfaceBlockRegister(const std::string &interfaceBlockName) const
  {
      ASSERT(hasInterfaceBlock(interfaceBlockName));
      return mInterfaceBlockRegisterMap.find(interfaceBlockName)->second;
  }
  
  const std::map<std::string, unsigned int> *TranslatorHLSL::getUniformRegisterMap() const
  {
      return &mUniformRegisterMap;
  }
  
  }  // namespace sh
  

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