coins.opt
Class ConstPropagationAndFolding

java.lang.Object
  coins.opt.ConstPropagationAndFolding

Direct Known Subclasses:

ConstPropagationAndFoldingHir

public class ConstPropagationAndFolding

extends java.lang.Object

Constant propagation and folding basic logic class. Excluded cases: Use point has multiple definition points Not included in DefIn (may be undefined) Node to which value is to be set Operand of address expression Node having no symbol Vector or structure variable Address taken variable Type of expression differs with the type of constant float/double variable Direct child of SwitchStmt (switch selector) Node generated by previous optimization (before finishHir()) Node already replaced ExpId is not allocated (not an expression)

Field Summary

protected DataFlow	fDataFlow
protected int	fDbgLevel
FlowRoot	flowRoot
(package private) FlowResults	fResults
SubpFlow	fSubpFlow
protected UseDefList	fUDList
(package private) static int	JAVA_BYTE_SIZE
(package private) static int	JAVA_CHAR_SIZE
(package private) static int	JAVA_INT_SIZE
(package private) static int	JAVA_LONG_SIZE
(package private) static int	JAVA_SHORT_SIZE
Opt	opt
Sym	sym
SymRoot	symRoot

Constructor Summary

ConstPropagationAndFolding(FlowResults pResults)
ConstPropagationAndFolding

Method Summary

protected boolean	doBBlock(BBlock pBBlock, java.util.Set pReplacedNodes) doBBlock
boolean	doSubp(SubpFlow pSubpFlow) doSubp
(package private) HIR	SkipConv(HIR exp) ex) expression :p = (int) a; exp := (int) [node] return ; a [node] ;

Methods inherited from class java.lang.Object

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

Field Detail

JAVA_BYTE_SIZE

static final int JAVA_BYTE_SIZE

See Also:

Constant Field Values

JAVA_CHAR_SIZE

static final int JAVA_CHAR_SIZE

See Also:

Constant Field Values

JAVA_SHORT_SIZE

static final int JAVA_SHORT_SIZE

See Also:

Constant Field Values

JAVA_INT_SIZE

static final int JAVA_INT_SIZE

See Also:

Constant Field Values

JAVA_LONG_SIZE

static final int JAVA_LONG_SIZE

See Also:

Constant Field Values

flowRoot

public final FlowRoot flowRoot

symRoot

public final SymRoot symRoot

sym

public final Sym sym

fResults

FlowResults fResults

opt

public final Opt opt

fSubpFlow

public final SubpFlow fSubpFlow

fUDList

protected UseDefList fUDList

fDataFlow

protected DataFlow fDataFlow

fDbgLevel

protected final int fDbgLevel

Constructor Detail

ConstPropagationAndFolding

public ConstPropagationAndFolding(FlowResults pResults)

ConstPropagationAndFolding

Method Detail

SkipConv

HIR SkipConv(HIR exp)

ex) expression :p = (int) a; exp := (int) [node] return ; a [node] ;

doSubp

public boolean doSubp(SubpFlow pSubpFlow)

doSubp

doBBlock

protected boolean doBBlock(BBlock pBBlock,
                           java.util.Set pReplacedNodes)

doBBlock