chromium/third_party/angle/src/compiler/translator/ValidateTypeSizeLimitations.cpp

//
// Copyright 2021 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.
//

#include "compiler/translator/ValidateTypeSizeLimitations.h"

#include "angle_gl.h"
#include "common/mathutil.h"
#include "compiler/translator/Diagnostics.h"
#include "compiler/translator/Symbol.h"
#include "compiler/translator/SymbolTable.h"
#include "compiler/translator/blocklayout.h"
#include "compiler/translator/tree_util/IntermTraverse.h"
#include "compiler/translator/util.h"

namespace sh
{

namespace
{

// Arbitrarily enforce that all types declared with a size in bytes of over 2 GB will cause
// compilation failure.
//
// For local and global variables, the limit is much lower (64KB) as that much memory won't fit in
// the GPU registers anyway.
constexpr size_t kMaxVariableSizeInBytes             = …;
constexpr size_t kMaxPrivateVariableSizeInBytes      = …;
constexpr size_t kMaxTotalPrivateVariableSizeInBytes = …;

// Traverses intermediate tree to ensure that the shader does not
// exceed certain implementation-defined limits on the sizes of types.
// Some code was copied from the CollectVariables pass.
class ValidateTypeSizeLimitationsTraverser : public TIntermTraverser
{ … };

}  // namespace

bool ValidateTypeSizeLimitations(TIntermNode *root,
                                 TSymbolTable *symbolTable,
                                 TDiagnostics *diagnostics)
{ … }

}  // namespace sh