1 files changed, 48 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/compiler/translator/tree_util/ReplaceVariable.h b/gfx/angle/checkout/src/compiler/translator/tree_util/ReplaceVariable.h
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index 0000000000..e96bbc7a82
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+++ b/gfx/angle/checkout/src/compiler/translator/tree_util/ReplaceVariable.h
@@ -0,0 +1,48 @@
+//
+// 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_