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diff --git a/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/SeparateExpressionsReturningArrays.h b/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/SeparateExpressionsReturningArrays.h
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+++ b/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/SeparateExpressionsReturningArrays.h
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+//
+// 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.
+//
+// SeparateExpressionsReturningArrays splits array-returning expressions that are not array names
+// from more complex expressions, assigning them to a temporary variable a#.
+// Examples where a, b and c are all arrays:
+// (a = b) == (a = c) is split into a = b; type[n] a1 = a; a = c; type[n] a2 = a; a1 == a2;
+// type d = type[n](...)[i]; is split into type[n] a1 = type[n](...); type d = a1[i];
+
+#ifndef COMPILER_TRANSLATOR_TREEOPS_D3D_SEPARATEEXPRESSIONSRETURNINGARRAYS_H_
+#define COMPILER_TRANSLATOR_TREEOPS_D3D_SEPARATEEXPRESSIONSRETURNINGARRAYS_H_
+
+#include "common/angleutils.h"
+
+namespace sh
+{
+class TCompiler;
+class TIntermNode;
+class TSymbolTable;
+
+[[nodiscard]] bool SeparateExpressionsReturningArrays(TCompiler *compiler,
+                                                      TIntermNode *root,
+                                                      TSymbolTable *symbolTable);
+}  // namespace sh
+
+#endif  // COMPILER_TRANSLATOR_TREEOPS_D3D_SEPARATEEXPRESSIONSRETURNINGARRAYS_H_