coins.opt
Class LoopExpansion

java.lang.Object
  coins.opt.LoopExpansion

Direct Known Subclasses:

LoopUnrolling, LoopUnswitching

public abstract class LoopExpansion

extends java.lang.Object

title: LoopExpansion class.

description: Abstract class for Loop Expansion implement class.

Field Summary

protected int	fDbgLevel
protected FlowRoot	flowRoot
protected int	fMaxAllowableNodesInLoopBody
protected int	fNumberOfGeneralRegisters
protected java.util.Map	fOptionMap
protected CoinsOptions	fOptions
protected HirRoot	hirRoot
protected IoRoot	ioRoot
protected SymRoot	symRoot

Constructor Summary

protected

LoopExpansion(HirRoot phirRoot) Construct this object

Method Summary

protected int	calcStatementCount(Stmt pStmt) Calculate Stmt count in pStmt.
abstract boolean	doSubprogram(SubpDefinition pSubpDef) Do Optimize in subprogram.
protected Var	getArrayVar(SubscriptedExp Subs) Get array Var SubscriptedExp has.
protected Debug	getDebug() Get Debug this object refer.
int	getMaxAllowableStmtsInLoopBody() Get max statement count in loopbody of which allow expand.
protected Exp	getSimpleExp(Exp pExp) Get simple Exp for Conv'ed, or Undecay'ed Exp.
protected java.util.Set	getSubscriptVar(SubscriptedExp Subs) Get subscript Vars SubscriptedExp has.
protected boolean	hasBadElement(Stmt pStmt) Check whether Stmt contains bad element.
protected boolean	isBadElement(HIR hirElement) Check whether hir element is bad for loop optimizations, is follows at least.
void	setMaxAllowableStmtsInLoopBody(int pMaxAllowableStmtCount) Set max statement count in loopbody of which allow expand.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

hirRoot

protected HirRoot hirRoot

flowRoot

protected FlowRoot flowRoot

symRoot

protected SymRoot symRoot

ioRoot

protected IoRoot ioRoot

fOptionMap

protected java.util.Map fOptionMap

fOptions

protected CoinsOptions fOptions

fNumberOfGeneralRegisters

protected int fNumberOfGeneralRegisters

fMaxAllowableNodesInLoopBody

protected int fMaxAllowableNodesInLoopBody

fDbgLevel

protected int fDbgLevel

Constructor Detail

LoopExpansion

protected LoopExpansion(HirRoot phirRoot)

Construct this object

Parameters:

phirRoot - HIR root object.

Method Detail

getMaxAllowableStmtsInLoopBody

public int getMaxAllowableStmtsInLoopBody()

Get max statement count in loopbody of which allow expand.

Returns:

max statement count in loopbody of which allow expand.

setMaxAllowableStmtsInLoopBody

public void setMaxAllowableStmtsInLoopBody(int pMaxAllowableStmtCount)

Set max statement count in loopbody of which allow expand.

Parameters:

pMaxAllowableStmtCount - max statement count in loopbody of which allow expand.

doSubprogram

public abstract boolean doSubprogram(SubpDefinition pSubpDef)

Do Optimize in subprogram.

Parameters:

pSubpDef - SubpDefinition to do optimization.

Returns:

true if optimized, false if else.

getDebug

protected Debug getDebug()

Get Debug this object refer.

Returns:

Debug this object refer

getSimpleExp

protected Exp getSimpleExp(Exp pExp)

Get simple Exp for Conv'ed, or Undecay'ed Exp.

Parameters:

pExp - Exp object.

Returns:

Simple Exp for Conv'ed, or Undecay'ed Exp.

isBadElement

protected boolean isBadElement(HIR hirElement)

Check whether hir element is bad for loop optimizations, is follows at least. CallStmt volatiled sym

Returns:

true if Stmt contains CallStmt, false if else.

hasBadElement

protected boolean hasBadElement(Stmt pStmt)

Check whether Stmt contains bad element.

Parameters:

pStmt - Stmt object.

Returns:

true if Stmt contains CallStmt, false if else.

calcStatementCount

protected int calcStatementCount(Stmt pStmt)

Calculate Stmt count in pStmt. but exclude follows: LabeledStmt BlockStmt

Parameters:

pStmt - Stmt object.

Returns:

Stmt count of pStmt has.

getArrayVar

protected Var getArrayVar(SubscriptedExp Subs)

Get array Var SubscriptedExp has.

Parameters:

Subs - SubscriptedExp object

Returns:

Var that is array var of array.

getSubscriptVar

protected java.util.Set getSubscriptVar(SubscriptedExp Subs)

Get subscript Vars SubscriptedExp has. which is counted SubscriptedExp that is child of Parent SubscriptedExp.

Parameters:

Subs - SubscriptedExp object

Returns:

Set of Var that is subscript exp of array.