com.oracle.graal.lir.amd64

Class AMD64SaveRegistersOp

java.lang.Object

com.oracle.graal.lir.LIRInstruction

com.oracle.graal.lir.amd64.AMD64LIRInstruction

com.oracle.graal.lir.amd64.AMD64SaveRegistersOp

All Implemented Interfaces:

StandardOp.SaveRegistersOp

public class AMD64SaveRegistersOp
extends AMD64LIRInstruction
implements StandardOp.SaveRegistersOp

Saves registers to stack slots.

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.graal.lir.LIRInstruction

LIRInstruction.Alive, LIRInstruction.Def, LIRInstruction.OperandFlag, LIRInstruction.OperandMode, LIRInstruction.State, LIRInstruction.Temp, LIRInstruction.Use

Field Summary

Fields

Modifier and Type	Field and Description
protected Register[]	savedRegisters The registers (potentially) saved by this operation.
protected StackSlotValue[]	slots The slots to which the registers are saved.
protected boolean	supportsRemove Specifies if remove(Set) should have an effect.
static LIRInstructionClass<AMD64SaveRegistersOp>	TYPE

Fields inherited from class com.oracle.graal.lir.LIRInstruction

ADDRESS_FLAGS, ALLOWED_FLAGS

Constructor Summary

Constructors

Constructor and Description
AMD64SaveRegistersOp(LIRInstructionClass<? extends AMD64SaveRegistersOp> c, Register[] savedRegisters, StackSlotValue[] savedRegisterLocations, boolean supportsRemove)
AMD64SaveRegistersOp(Register[] savedRegisters, StackSlotValue[] savedRegisterLocations, boolean supportsRemove)

Method Summary

Modifier and Type	Method and Description
void	emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm)
RegisterSaveLayout	getMap(FrameMap frameMap) Gets a map from the saved registers saved by this operation to the frame slots in which they are saved.
StackSlotValue[]	getSlots()
private static int	indexForStackSlot(FrameMap frameMap, StackSlot slot) Computes the index of a stack slot relative to slot 0.
(package private) static int	prune(Set<Register> toRemove, Register[] registers)
int	remove(Set<Register> doNotSave) Prunes doNotSave from the registers saved by this operation.
protected void	saveRegister(CompilationResultBuilder crb, AMD64MacroAssembler masm, StackSlot result, Register register)
boolean	supportsRemove() Determines if the StandardOp.SaveRegistersOp.remove(Set) operation is supported for this object.

Methods inherited from class com.oracle.graal.lir.amd64.AMD64LIRInstruction

emitCode

Methods inherited from class com.oracle.graal.lir.LIRInstruction

destroysCallerSavedRegisters, forEachAlive, forEachAlive, forEachInput, forEachInput, forEachOutput, forEachOutput, forEachRegisterHint, forEachRegisterHint, forEachState, forEachState, forEachState, forEachState, forEachTemp, forEachTemp, getLIRInstructionClass, hasOperands, hasState, id, name, setId, toString, toStringWithIdPrefix, verify, visitEachAlive, visitEachAlive, visitEachInput, visitEachInput, visitEachOutput, visitEachOutput, visitEachState, visitEachState, visitEachTemp, visitEachTemp

Methods inherited from class java.lang.Object

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

Field Detail

TYPE

public static final LIRInstructionClass<AMD64SaveRegistersOp> TYPE

savedRegisters

protected final Register[] savedRegisters

The registers (potentially) saved by this operation.

slots

protected final StackSlotValue[] slots

The slots to which the registers are saved.

supportsRemove

protected final boolean supportsRemove

Specifies if remove(Set) should have an effect.

Constructor Detail

AMD64SaveRegistersOp

public AMD64SaveRegistersOp(Register[] savedRegisters,
                            StackSlotValue[] savedRegisterLocations,
                            boolean supportsRemove)

Parameters:

savedRegisters - the registers saved by this operation which may be subject to pruning

savedRegisterLocations - the slots to which the registers are saved

supportsRemove - determines if registers can be pruned

AMD64SaveRegistersOp

public AMD64SaveRegistersOp(LIRInstructionClass<? extends AMD64SaveRegistersOp> c,
                            Register[] savedRegisters,
                            StackSlotValue[] savedRegisterLocations,
                            boolean supportsRemove)

Method Detail

saveRegister

protected void saveRegister(CompilationResultBuilder crb,
                            AMD64MacroAssembler masm,
                            StackSlot result,
                            Register register)

emitCode

public void emitCode(CompilationResultBuilder crb,
                     AMD64MacroAssembler masm)

Specified by:

emitCode in class AMD64LIRInstruction

getSlots

public StackSlotValue[] getSlots()

supportsRemove

public boolean supportsRemove()

Description copied from interface: StandardOp.SaveRegistersOp

Determines if the StandardOp.SaveRegistersOp.remove(Set) operation is supported for this object.

Specified by:

supportsRemove in interface StandardOp.SaveRegistersOp

remove

public int remove(Set<Register> doNotSave)

Description copied from interface: StandardOp.SaveRegistersOp

Prunes doNotSave from the registers saved by this operation.

Specified by:

remove in interface StandardOp.SaveRegistersOp

Parameters:

doNotSave - registers that should not be saved by this operation

Returns:

the number of registers pruned

prune

static int prune(Set<Register> toRemove,
                 Register[] registers)

getMap

public RegisterSaveLayout getMap(FrameMap frameMap)

Description copied from interface: StandardOp.SaveRegistersOp

Gets a map from the saved registers saved by this operation to the frame slots in which they are saved.

Specified by:

getMap in interface StandardOp.SaveRegistersOp

Parameters:

frameMap - used to convert a virtual slot to a frame slot index

indexForStackSlot

private static int indexForStackSlot(FrameMap frameMap,
                                     StackSlot slot)

Computes the index of a stack slot relative to slot 0. This is also the bit index of stack slots in the reference map.

Parameters:

slot - a stack slot

Returns:

the index of the stack slot