sandmark.obfuscate.boolsplitter.dtree
Class Swizzler

java.lang.Object
  |
  +--sandmark.obfuscate.boolsplitter.dtree.Swizzler

public class Swizzler

extends java.lang.Object

Swizzler represents an induction variable that is used as an index into an array. Analysis can be done to determine if array swizzle (aswizzle) instruction(s) can be hoisted out of the loop.

Field Summary

(package private) Expr	array
(package private) SCStmt	aswizzle
(package private) Expr	end_val
(package private) Expr	ind_var
(package private) Expr	init_val
(package private) Block	phi_block
(package private) Expr	target

Constructor Summary

Swizzler(Expr var, Expr tgt, Expr val, Block phiblock)
Constructor.

Method Summary

Expr	array()
SCStmt	aswizzle()
Expr	end_val()
Expr	ind_var()
Expr	init_val()
Block	phi_block()
void	set_array(Expr a)
void	set_aswizzle(SCStmt sc)
void	set_end_val(Expr end) Sets the ending value for the induction variable.
Expr	target()

Methods inherited from class java.lang.Object

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

Field Detail

ind_var

Expr ind_var

target

Expr target

init_val

Expr init_val

end_val

Expr end_val

array

Expr array

phi_block

Block phi_block

aswizzle

SCStmt aswizzle

Constructor Detail

Swizzler

public Swizzler(Expr var,
                Expr tgt,
                Expr val,
                Block phiblock)

Constructor.

Parameters:

var - Induction variable. (An index variable for an array.)

tgt - Target of the phi statement that defines the induction variable.

val - Initial value of the induction variable.

phiblock - The block in which the phi statement resides.

Method Detail

set_end_val

public void set_end_val(Expr end)

Sets the ending value for the induction variable.

Parameters:

end - The final value the induction variable will take on.

set_array

public void set_array(Expr a)

Parameters:

a - The array that is indexed by the induction variable.

set_aswizzle

public void set_aswizzle(SCStmt sc)

Parameters:

sc - The aswizzle statement that could be removed from the block.

ind_var

public Expr ind_var()

target

public Expr target()

init_val

public Expr init_val()

end_val

public Expr end_val()

array

public Expr array()

phi_block

public Block phi_block()

aswizzle

public SCStmt aswizzle()