<commit_before>//===- llvm/Analysis/InductionVariable.h - Induction variable ----*- C++ -*--=//
//
// This interface is used to identify and classify induction variables that
// exist in the program.  Induction variables must contain a PHI node that
// exists in a loop header.  Because of this, they are identified an managed by
// this PHI node.
//
// Induction variables are classified into a type.  Knowing that an induction
// variable is of a specific type can constrain the values of the start and
// step.  For example, a SimpleLinear induction variable must have a start and
// step values that are constants.
//
// Induction variables can be created with or without loop information.  If no
// loop information is available, induction variables cannot be recognized to be
// more than SimpleLinear variables.
//
//===----------------------------------------------------------------------===//

#include "llvm/Analysis/InductionVariable.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/Expressions.h"
#include "llvm/BasicBlock.h"
#include "llvm/iPHINode.h"
#include "llvm/iOperators.h"
#include "llvm/iTerminators.h"
#include "llvm/Type.h"
#include "llvm/Constants.h"
#include "llvm/Support/CFG.h"
#include "llvm/Assembly/Writer.h"<commit_msg>clean up file header comment<commit_after>//===- InductionVariable.cpp - Induction variable classification ----------===//
//
// This file implements identification and classification of induction 
// variables.  Induction variables must contain a PHI node that exists in a 
// loop header.  Because of this, they are identified an managed by this PHI 
// node.
//
// Induction variables are classified into a type.  Knowing that an induction
// variable is of a specific type can constrain the values of the start and
// step.  For example, a SimpleLinear induction variable must have a start and
// step values that are constants.
//
// Induction variables can be created with or without loop information.  If no
// loop information is available, induction variables cannot be recognized to be
// more than SimpleLinear variables.
//
//===----------------------------------------------------------------------===//

#include "llvm/Analysis/InductionVariable.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/Expressions.h"
#include "llvm/BasicBlock.h"
#include "llvm/iPHINode.h"
#include "llvm/iOperators.h"
#include "llvm/iTerminators.h"
#include "llvm/Type.h"
#include "llvm/Constants.h"
#include "llvm/Support/CFG.h"
#include "llvm/Assembly/Writer.h"
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