Dexmaker 1.5 · org.droidparts.dexmaker.dx.ssa.ConstCollector

Modifier and Type	Field and Description
private static boolean	COLLECT_ONE_LOCAL If true, allow one local var to be involved with a collected const.
private static boolean	COLLECT_STRINGS Also collect string consts, although they can throw exceptions.
private static final int	MAX_COLLECTED_CONSTANTS Maximum constants to collect per method.
private final SsaMethod	ssaMeth method we're processing

Access	Constructor and Description
private	ConstCollector(SsaMethod `non-null;` method to process ssaMethod) Constructs an instance.

Method Summary

Modifier and Type	Method and Description
private void	fixLocalAssignment(RegisterSpec `non-null;` original register origReg, RegisterSpec `non-null;` new register that will replace `origReg` newReg) Inserts mark-locals if necessary when changing a register.
private ArrayList<TypedConstant>	Returns: `non-null;` list of constants in most-to-least used order getConstsSortedByCountUse() Gets all of the collectable constant values used in this method, sorted by most used first.
public static void	process(SsaMethod `non-null;` method to process ssaMethod) Processes a method.
private void	run() Applies the optimization.
private void	updateConstUses(HashMap<TypedConstant, RegisterSpec> `non-null;` mapping between constant and new reg newRegs, int `>=0;` original SSA reg count, not including newly added constant regs origRegCount) Updates all uses of various consts to use the values in the newly assigned registers.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

COLLECT_ONE_LOCAL	back to summary
private static boolean COLLECT_ONE_LOCAL If true, allow one local var to be involved with a collected const. Turned off because it mostly just inserts more moves.

COLLECT_STRINGS	back to summary
private static boolean COLLECT_STRINGS Also collect string consts, although they can throw exceptions. This is off now because it just doesn't seem to gain a whole lot. TODO if you turn this on, you must change SsaInsn.hasSideEffect() to return false for const-string insns whose exceptions are not caught in the current method.

MAX_COLLECTED_CONSTANTS	back to summary
private static final int MAX_COLLECTED_CONSTANTS Maximum constants to collect per method. Puts cap on reg use

ssaMeth	back to summary
private final SsaMethod ssaMeth method we're processing

Constructor Detail

ConstCollector back to summary

ConstCollector	back to summary
private ConstCollector(SsaMethod ssaMethod) Constructs an instance. Parameters ssaMethod:SsaMethod `non-null;` method to process

private ConstCollector(SsaMethod ssaMethod)

Constructs an instance.

Parameters

ssaMethod:SsaMethod: non-null; method to process

Method Detail

fixLocalAssignment back to summary

fixLocalAssignment	back to summary
private void fixLocalAssignment(RegisterSpec origReg, RegisterSpec newReg) Inserts mark-locals if necessary when changing a register. If the definition of `origReg` is associated with a local variable, then insert a mark-local for `newReg` just below it. We expect the definition of `origReg` to ultimately be removed by the dead code eliminator Parameters origReg:RegisterSpec `non-null;` original register newReg:RegisterSpec `non-null;` new register that will replace `origReg`

private void fixLocalAssignment(RegisterSpec origReg, RegisterSpec newReg)

Inserts mark-locals if necessary when changing a register. If the definition of origReg is associated with a local variable, then insert a mark-local for newReg just below it. We expect the definition of origReg to ultimately be removed by the dead code eliminator

Parameters

origReg:RegisterSpec: non-null; original register
newReg:RegisterSpec: non-null; new register that will replace origReg

getConstsSortedByCountUse back to summary

getConstsSortedByCountUse	back to summary
private ArrayList<TypedConstant> getConstsSortedByCountUse() Gets all of the collectable constant values used in this method, sorted by most used first. Skips non-collectable consts, such as non-string object constants Returns:ArrayList<TypedConstant> `non-null;` list of constants in most-to-least used order

private ArrayList<TypedConstant> getConstsSortedByCountUse()

Gets all of the collectable constant values used in this method, sorted by most used first. Skips non-collectable consts, such as non-string object constants

Returns:ArrayList<TypedConstant>: non-null; list of constants in most-to-least used order

process back to summary

process	back to summary
public static void process(SsaMethod ssaMethod) Processes a method. Parameters ssaMethod:SsaMethod `non-null;` method to process

public static void process(SsaMethod ssaMethod)

Processes a method.

Parameters

ssaMethod:SsaMethod: non-null; method to process

run	back to summary
private void run() Applies the optimization.

updateConstUses back to summary

updateConstUses	back to summary
private void updateConstUses(HashMap<TypedConstant, RegisterSpec> newRegs, int origRegCount) Updates all uses of various consts to use the values in the newly assigned registers. Parameters newRegs:HashMap<TypedConstant, RegisterSpec> `non-null;` mapping between constant and new reg origRegCount:int `>=0;` original SSA reg count, not including newly added constant regs

private void updateConstUses(HashMap<TypedConstant, RegisterSpec> newRegs, int origRegCount)

Updates all uses of various consts to use the values in the newly assigned registers.

Parameters

newRegs:HashMap<TypedConstant, RegisterSpec>: non-null; mapping between constant and new reg
origRegCount:int: >=0; original SSA reg count, not including newly added constant regs

public Class ConstCollector

Field Summary

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Method Summary

Field Detail

Constructor Detail

Method Detail