chromium/third_party/angle/src/compiler/translator/tree_ops/glsl/RewriteRepeatedAssignToSwizzled.cpp

//
// 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.
//
// RewriteRepeatedAssignToSwizzled.cpp: Rewrite expressions that assign an assignment to a swizzled
// vector, like:
//     v.x = z = expression;
// to:
//     z = expression;
//     v.x = z;
//
// Note that this doesn't handle some corner cases: expressions nested inside other expressions,
// inside loop headers, or inside if conditions.

#include "compiler/translator/tree_ops/glsl/RewriteRepeatedAssignToSwizzled.h"

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

namespace sh
{

namespace
{

class RewriteAssignToSwizzledTraverser : public TIntermTraverser
{ … };

// static
bool RewriteAssignToSwizzledTraverser::rewrite(TCompiler *compiler, TIntermBlock *root)
{ … }

RewriteAssignToSwizzledTraverser::RewriteAssignToSwizzledTraverser()
    : … { … }

void RewriteAssignToSwizzledTraverser::nextIteration()
{ … }

bool RewriteAssignToSwizzledTraverser::visitBinary(Visit, TIntermBinary *node)
{ … }

}  // anonymous namespace

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

}  // namespace sh