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//
// 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"
namespace sh
{
class TCompiler;
class TIntermBlock;
class TIntermTyped;
class TSymbolTable;
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<const TVariable *, 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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