chromium/third_party/angle/src/compiler/translator/tree_ops/RemoveArrayLengthMethod.cpp

//
// Copyright 2017 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.
//
// RemoveArrayLengthMethod.cpp:
//   Fold array length expressions, including cases where the "this" node has side effects.
//   Example:
//     int i = (a = b).length();
//     int j = (func()).length();
//   becomes:
//     (a = b);
//     int i = <constant array length>;
//     func();
//     int j = <constant array length>;
//
//   Must be run after SplitSequenceOperator, SimplifyLoopConditions and SeparateDeclarations steps
//   have been done to expressions containing calls of the array length method.
//
//   Does nothing to length method calls done on runtime-sized arrays.

#include "compiler/translator/tree_ops/RemoveArrayLengthMethod.h"

#include "compiler/translator/IntermNode.h"
#include "compiler/translator/tree_util/IntermTraverse.h"

namespace sh
{

namespace
{

class RemoveArrayLengthTraverser : public TIntermTraverser
{ … };

bool RemoveArrayLengthTraverser::visitUnary(Visit visit, TIntermUnary *node)
{ … }

void RemoveArrayLengthTraverser::insertSideEffectsInParentBlock(TIntermTyped *node)
{ … }

}  // anonymous namespace

bool RemoveArrayLengthMethod(TCompiler *compiler, TIntermBlock *root)
{ … }

}  // namespace sh