coins.ssa
Class DivideExpression

java.lang.Object
  coins.ssa.DivideExpression

All Implemented Interfaces:

LocalTransformer, Transformer

class DivideExpression

extends java.lang.Object

implements LocalTransformer

Divide expressions into 3 address expression.

Field Summary

static java.lang.String	DIVEX The name of the symbol which the optimzer uses to make the temporary variables
static int	THR The threshold of the debug print

Constructor Summary

DivideExpression(SsaEnvironment e, SsaSymTab symtab)
Constructor

Method Summary

(package private) LirNode	divide(LirNode node, BiLink link, boolean setSrc, boolean setDst) Divide the expression into 3 address expression recursively.
boolean	doIt(Data data, ImList args) Transform the DATA component.
boolean	doIt(Function f, ImList args) Divide the expressions into 3 address expression.
java.lang.String	name() Return the name of the transforming engine.
java.lang.String	subject() Return brief description of the tranformation.

Methods inherited from class java.lang.Object

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

Field Detail

THR

public static final int THR

The threshold of the debug print

See Also:

Constant Field Values

DIVEX

public static final java.lang.String DIVEX

The name of the symbol which the optimzer uses to make the temporary variables

See Also:

Constant Field Values

Constructor Detail

DivideExpression

public DivideExpression(SsaEnvironment e,
                        SsaSymTab symtab)

Constructor

Parameters:

e - The environment of the SSA module

symtab - The current symbol table

Method Detail

doIt

public boolean doIt(Data data,
                    ImList args)

Description copied from interface: LocalTransformer

Transform the DATA component.

Specified by:

doIt in interface LocalTransformer

Parameters:

data - DATA to be transformed.

args - list of optional arguments.

Returns:

true if transformation suceeded.

name

public java.lang.String name()

Description copied from interface: Transformer

Return the name of the transforming engine. Used for trace tag name.

Specified by:

name in interface Transformer

Returns:

the name of the transforming engine.

subject

public java.lang.String subject()

Description copied from interface: Transformer

Return brief description of the tranformation.

Specified by:

subject in interface Transformer

Returns:

brief description of the tranformation.

doIt

public boolean doIt(Function f,
                    ImList args)

Divide the expressions into 3 address expression.

Specified by:

doIt in interface LocalTransformer

Parameters:

f - The current function

args - The list of options

Returns:

true if transformation suceeded.

divide

LirNode divide(LirNode node,
               BiLink link,
               boolean setSrc,
               boolean setDst)

Divide the expression into 3 address expression recursively.

Parameters:

node - The current LIR node

link - The place where the new expression attachs to

setSrc - Whether the current LIR node is from the source operands of the SET operator

setDst - Whether the current LIR node is from the destination operands of the SET operator

Returns:

The divided LIR node