kc3-lang/angle/src/compiler/translator/tree_ops/RemoveInvariantDeclaration.cpp

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• Author : Shahbaz Youssefi
  Date : 2019-12-03 11:31:18
  Hash : 795a3559
  Message : Vulkan: EXT_gpu_shader5 support: precise The precise keyword is used in tessellation shaders but introduced in this extension. EXT_gpu_shader5 introduces a handful of features to shaders. This change only implements the `precise` keyword. Bug: angleproject:3569 Change-Id: I2252b79098eb8ba2d2faa040d7eaed7548b7051e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1939851 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Cody Northrop <cnorthrop@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>

• src/compiler/translator/tree_ops/RemoveInvariantDeclaration.cpp

• //
  // 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.
  //
  
  #include "compiler/translator/tree_ops/RemoveInvariantDeclaration.h"
  
  #include "compiler/translator/tree_util/IntermTraverse.h"
  
  namespace sh
  {
  
  namespace
  {
  
  // An AST traverser that removes invariant declaration for input in fragment shader
  // when GLSL >= 4.20 and for output in vertex shader when GLSL < 4.2.
  class RemoveInvariantDeclarationTraverser : public TIntermTraverser
  {
    public:
      RemoveInvariantDeclarationTraverser() : TIntermTraverser(true, false, false) {}
  
    private:
      bool visitGlobalQualifierDeclaration(Visit visit,
                                           TIntermGlobalQualifierDeclaration *node) override
      {
          if (node->isInvariant())
          {
              TIntermSequence emptyReplacement;
              mMultiReplacements.push_back(NodeReplaceWithMultipleEntry(getParentNode()->getAsBlock(),
                                                                        node, emptyReplacement));
          }
          return false;
      }
  };
  
  }  // anonymous namespace
  
  bool RemoveInvariantDeclaration(TCompiler *compiler, TIntermNode *root)
  {
      RemoveInvariantDeclarationTraverser traverser;
      root->traverse(&traverser);
      return traverser.updateTree(compiler, root);
  }
  
  }  // namespace sh