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diff --git a/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/RewriteExpressionsWithShaderStorageBlock.h b/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/RewriteExpressionsWithShaderStorageBlock.h
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+++ b/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/RewriteExpressionsWithShaderStorageBlock.h
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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.
+//
+// RewriteExpressionsWithShaderStorageBlock rewrites the expressions that contain shader storage
+// block calls into several simple ones that can be easily handled in the HLSL translator. After the
+// AST pass, all ssbo related blocks will be like below:
+// ssbo_access_chain = ssbo_access_chain;
+// ssbo_access_chain = expr_no_ssbo;
+// lvalue_no_ssbo = ssbo_access_chain;
+//
+// Below situations are needed to be rewritten (Details can be found in .cpp file).
+// SSBO as the operand of compound assignment operators.
+// SSBO as the operand of ++/--.
+// SSBO as the operand of repeated assignment.
+// SSBO as the operand of readonly unary/binary/ternary operators.
+// SSBO as the argument of aggregate type.
+// SSBO as the condition of if/switch/while/do-while/for
+
+#ifndef COMPILER_TRANSLATOR_TREEOPS_D3D_REWRITE_EXPRESSIONS_WITH_SHADER_STORAGE_BLOCK_H_
+#define COMPILER_TRANSLATOR_TREEOPS_D3D_REWRITE_EXPRESSIONS_WITH_SHADER_STORAGE_BLOCK_H_
+
+#include "common/angleutils.h"
+
+namespace sh
+{
+class TCompiler;
+class TIntermNode;
+class TSymbolTable;
+
+[[nodiscard]] bool RewriteExpressionsWithShaderStorageBlock(TCompiler *compiler,
+ TIntermNode *root,
+ TSymbolTable *symbolTable);
+} // namespace sh
+
+#endif // COMPILER_TRANSLATOR_TREEOPS_D3D_REWRITE_EXPRESSIONS_WITH_SHADER_STORAGE_BLOCK_H_