EmulateMutableFunctionParams.h

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//

// Copyright 2025 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.

//

// EmulateMutableFunctionParams: If function parameters are modified

// in the function body, they are replaced with temporary copies, since

// function parameters are always immuable in WGSL.

//

// Example:

//

// vec4 doFoo(Foo foo, float zw)

// {

//     foo.x = foo.y;

//     return vec4(foo.x, foo.y, zw, zw);

// }

//

// Result:

//

// vec4 doFoo(Foo foo, float zw)

// {

//     Foo sbc7 = foo;

//     sbc7.x = sbc7.y;

//     return vec4(sbc7.x, sbc7.y, zw, zw);

// }

//

// NOTE: this an be deleted if WGSL standardized mutable function parameters.

// https://github.com/gpuweb/gpuweb/issues/4113

//

#ifndef COMPILER_TRANSLATOR_TREEOPS_WGSL_EMULATEMUTABLEFUNCTIONPARAMS_H_

#define COMPILER_TRANSLATOR_TREEOPS_WGSL_EMULATEMUTABLEFUNCTIONPARAMS_H_

#include "common/angleutils.h"

#include "compiler/translator/Compiler.h"

namespace sh

class TCompiler;

class TIntermBlock;

class TSymbolTable;

[[nodiscard]] bool EmulateMutableFunctionParams(TCompiler *compiler, TIntermBlock *root);

}  // namespace sh

#endif  // COMPILER_TRANSLATOR_TREEOPS_WGSL_EMULATEMUTABLEFUNCTIONPARAMS_H_