coins.ssa
Class SsaSymTab

java.lang.Object
  coins.ssa.SsaSymTab

class SsaSymTab

extends java.lang.Object

The symbol table of SSA variables.

Field Summary

static java.lang.String	DUMMY_FUNC
(package private) int	nPhyRegs
(package private) EnumRegVars	rn

Constructor Summary

(package private)

SsaSymTab(SsaEnvironment e, Function f) Constructor Create a new symbol table in the SSA form.

Method Summary

(package private) int	compare(Symbol s1, Symbol s2) Compare the specified two symbols.
(package private) Symbol	currentAddressSymbol(Symbol s) Get the current symbol of the FRAME or the STATIC node.
boolean	isPhyReg(Symbol s)
(package private) Symbol	newAddressSymbol(Symbol s) Get a new symbol of the FRAME node or the STATIC node.
(package private) Symbol	newGlobalSymbol(java.lang.String name)
(package private) Symbol	newSsaSymbol(java.lang.String name, int type) Get a new symbol of the SSA variable.
(package private) Symbol	newSsaSymbol(Symbol s) Get a new symbol of the SSA variable.
(package private) Symbol	newSsaSymbol1(Symbol s) Called from TranslateToSsa.
(package private) Symbol	orgSym(Symbol s) Get the original symbol of the specified symbol.

Methods inherited from class java.lang.Object

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

Field Detail

rn

EnumRegVars rn

nPhyRegs

int nPhyRegs

DUMMY_FUNC

public static final java.lang.String DUMMY_FUNC

See Also:

Constant Field Values

Constructor Detail

SsaSymTab

SsaSymTab(SsaEnvironment e,
          Function f)

Constructor
Create a new symbol table in the SSA form. Initialize all local variables in the current function.

Parameters:

e - The environment of the SSA module

f - The current function

Method Detail

compare

int compare(Symbol s1,
            Symbol s2)

Compare the specified two symbols.

Parameters:

s1 - The first specified symbol

s2 - The second specified symbol

Returns:

If s1 and s2 are the same, return 0. If s1 has the large suffix number, then return 1. Otherwise return -1.

orgSym

Symbol orgSym(Symbol s)

Get the original symbol of the specified symbol.

Parameters:

s - The specified symbol

Returns:

Original symbol of the specified one

newAddressSymbol

Symbol newAddressSymbol(Symbol s)

Get a new symbol of the FRAME node or the STATIC node.

Parameters:

s - The old symbol

Returns:

A new symbol

currentAddressSymbol

Symbol currentAddressSymbol(Symbol s)

Get the current symbol of the FRAME or the STATIC node.

Parameters:

s - The specified symbol

Returns:

The current symbol for the specified symbol

newSsaSymbol

Symbol newSsaSymbol(Symbol s)

Get a new symbol of the SSA variable.

Parameters:

s - The old symbol

Returns:

A new symbol of the SSA variable

newSsaSymbol1

Symbol newSsaSymbol1(Symbol s)

Called from TranslateToSsa. Get a new symbol of the SSA variable.

Parameters:

s - The old symbol

Returns:

A new symbol of the SSA variable

isPhyReg

public boolean isPhyReg(Symbol s)

newGlobalSymbol

Symbol newGlobalSymbol(java.lang.String name)

newSsaSymbol

Symbol newSsaSymbol(java.lang.String name,
                    int type)

Get a new symbol of the SSA variable.

Parameters:

name - The base name of the symbol

type - The type of the symbol

Returns:

A new symbol of the SSA variable