kc3-lang/angle/src/compiler/translator/tree_util/ReplaceVariable.h

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• Hash : f128872e
  Author :
  Date : 2025-09-16T23:37:08
  

  Translator: Compare variables by unique id instead of pointer
  
  Bug: angleproject:349994211
  Change-Id: I32ab2ffe9a04e196330949484e704913d0f4e41d
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6955119
  Reviewed-by: Yuxin Hu <yuxinhu@google.com>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Yuxin Hu <yuxinhu@google.com>
  

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• src/compiler/translator/tree_util/ReplaceVariable.h

• //
  // Copyright 2018 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.
  //
  // ReplaceVariable.h: Replace all references to a specific variable in the AST with references to
  // another variable.
  
  #ifndef COMPILER_TRANSLATOR_TREEUTIL_REPLACEVARIABLE_H_
  #define COMPILER_TRANSLATOR_TREEUTIL_REPLACEVARIABLE_H_
  
  #include "common/angleutils.h"
  #include "common/hash_containers.h"
  
  namespace sh
  {
  
  class TCompiler;
  class TIntermBlock;
  class TIntermTyped;
  class TSymbolTable;
  class TSymbolUniqueId;
  class TVariable;
  
  [[nodiscard]] bool ReplaceVariable(TCompiler *compiler,
                                     TIntermBlock *root,
                                     const TVariable *toBeReplaced,
                                     const TVariable *replacement);
  [[nodiscard]] bool ReplaceVariableWithTyped(TCompiler *compiler,
                                              TIntermBlock *root,
                                              const TVariable *toBeReplaced,
                                              const TIntermTyped *replacement);
  
  using VariableReplacementMap = angle::HashMap<TSymbolUniqueId, const TIntermTyped *>;
  
  // Replace a set of variables with their corresponding expression.
  [[nodiscard]] bool ReplaceVariables(TCompiler *compiler,
                                      TIntermBlock *root,
                                      const VariableReplacementMap &variableMap);
  
  // Find all declarators, and replace the TVariable they are declaring with a duplicate.  This is
  // used to support deepCopy of TIntermBlock and TIntermLoop nodes that include declarations.
  // Replacements already present in variableMap are preserved.
  void GetDeclaratorReplacements(TSymbolTable *symbolTable,
                                 TIntermBlock *root,
                                 VariableReplacementMap *variableMap);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEUTIL_REPLACEVARIABLE_H_
  

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