kc3-lang/angle/src/compiler/translator/tree_ops/InitializeVariables.h

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• Hash : 472c74c6
  Author :
  Date : 2019-08-19T16:32:13
  

  Translator: Allow tree validation in children of TCompiler
  
  This is to be able to perform validation inside TranslatorVulkan, even
  if it's through ASSERTs.
  
  Additionally, every transformation is changed such that they do their
  validation themselves.  TIntermTraverser::updateTree() performs the
  validation, which indirectly validates many of three tree
  transformations.  Some of the more ancient transformations that don't
  use this function directly call TCompiler::validateAST.
  
  Bug: angleproject:2733
  Change-Id: Ie4af029d34e053c5ad1dc8c2c2568eecd625d344
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1761149
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/compiler/translator/tree_ops/InitializeVariables.h

• //
  // Copyright 2002 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.
  //
  
  #ifndef COMPILER_TRANSLATOR_TREEOPS_INITIALIZEVARIABLES_H_
  #define COMPILER_TRANSLATOR_TREEOPS_INITIALIZEVARIABLES_H_
  
  #include <GLSLANG/ShaderLang.h>
  
  #include "compiler/translator/ExtensionBehavior.h"
  #include "compiler/translator/IntermNode.h"
  
  namespace sh
  {
  class TCompiler;
  class TSymbolTable;
  
  typedef std::vector<sh::ShaderVariable> InitVariableList;
  
  // For all of the functions below: If canUseLoopsToInitialize is set, for loops are used instead of
  // a large number of initializers where it can make sense, such as for initializing large arrays.
  
  // Return a sequence of assignment operations to initialize "initializedSymbol". initializedSymbol
  // may be an array, struct or any combination of these, as long as it contains only basic types.
  TIntermSequence *CreateInitCode(const TIntermTyped *initializedSymbol,
                                  bool canUseLoopsToInitialize,
                                  bool highPrecisionSupported,
                                  TSymbolTable *symbolTable);
  
  // Initialize all uninitialized local variables, so that undefined behavior is avoided.
  ANGLE_NO_DISCARD bool InitializeUninitializedLocals(TCompiler *compiler,
                                                      TIntermBlock *root,
                                                      int shaderVersion,
                                                      bool canUseLoopsToInitialize,
                                                      bool highPrecisionSupported,
                                                      TSymbolTable *symbolTable);
  
  // This function can initialize all the types that CreateInitCode is able to initialize. All
  // variables must be globals which can be found in the symbol table. For now it is used for the
  // following two scenarios:
  //   1. Initializing gl_Position;
  //   2. Initializing output variables referred to in the shader source.
  // Note: The type of each lvalue in an initializer is retrieved from the symbol table. gl_FragData
  // requires special handling because the number of indices which can be initialized is determined by
  // enabled extensions.
  ANGLE_NO_DISCARD bool InitializeVariables(TCompiler *compiler,
                                            TIntermBlock *root,
                                            const InitVariableList &vars,
                                            TSymbolTable *symbolTable,
                                            int shaderVersion,
                                            const TExtensionBehavior &extensionBehavior,
                                            bool canUseLoopsToInitialize,
                                            bool highPrecisionSupported);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEOPS_INITIALIZEVARIABLES_H_
  

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