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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.
//
// RewriteAtomicFunctionExpressions rewrites the expressions that contain
// atomic function calls and cannot be directly translated into HLSL into
// several simple ones that can be easily handled in the HLSL translator.
//
// We need to rewite these expressions because:
// 1. All GLSL atomic functions have return values, which all represent the
// original value of the shared or ssbo variable; while all HLSL atomic
// functions don't, and the original value can be stored in the last
// parameter of the function call.
// 2. For HLSL atomic functions, the last parameter that stores the original
// value is optional except for InterlockedExchange and
// InterlockedCompareExchange. Missing original_value in the call of
// InterlockedExchange or InterlockedCompareExchange results in a compile
// error from HLSL compiler.
//
// RewriteAtomicFunctionExpressions is a function that can modify the AST
// to ensure all the expressions that contain atomic function calls can be
// directly translated into HLSL expressions.
#ifndef COMPILER_TRANSLATOR_TREEOPS_D3D_REWRITE_ATOMIC_FUNCTION_EXPRESSIONS_H_
#define COMPILER_TRANSLATOR_TREEOPS_D3D_REWRITE_ATOMIC_FUNCTION_EXPRESSIONS_H_
#include "common/angleutils.h"
namespace sh
{
class TCompiler;
class TIntermNode;
class TSymbolTable;
[[nodiscard]] bool RewriteAtomicFunctionExpressions(TCompiler *compiler,
TIntermNode *root,
TSymbolTable *symbolTable,
int shaderVersion);
} // namespace sh
#endif // COMPILER_TRANSLATOR_TREEOPS_D3D_REWRITE_ATOMIC_FUNCTION_EXPRESSIONS_H_
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