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// Copyright (c) 2011 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/intermediate.h"
struct TLoopIndexInfo {
int id;
int initValue;
int stopValue;
int incrementValue;
TOperator op;
int currentValue;
class ForLoopUnroll {
ForLoopUnroll() { }
void FillLoopIndexInfo(TIntermLoop* node, TLoopIndexInfo& info);
// Update the info.currentValue for the next loop iteration.
void Step();
// Return false if loop condition is no longer satisfied.
bool SatisfiesLoopCondition();
// Check if the symbol is the index of a loop that's unrolled.
bool NeedsToReplaceSymbolWithValue(TIntermSymbol* symbol);
// Return the current value of a given loop index symbol.
int GetLoopIndexValue(TIntermSymbol* symbol);
void Push(TLoopIndexInfo& info);
void Pop();
static void MarkForLoopsWithIntegerIndicesForUnrolling(TIntermNode* root);
int getLoopIncrement(TIntermLoop* node);
int evaluateIntConstant(TIntermConstantUnion* node);
TVector<TLoopIndexInfo> mLoopIndexStack;