com.oracle.graal.lir.framemap

Interface FrameMapBuilder

All Known Subinterfaces:

FrameMapBuilderTool

All Known Implementing Classes:

AMD64FrameMapBuilder, FrameMapBuilderImpl, SPARCFrameMapBuilder

public interface FrameMapBuilder

A FrameMapBuilder is used to collect all information necessary to create a FrameMap.

Method Summary

Modifier and Type	Method and Description
VirtualStackSlot	allocateSpillSlot(LIRKind kind) Reserves a spill slot in the frame of the method being compiled.
VirtualStackSlot	allocateStackSlots(int slots, BitSet objects, List<VirtualStackSlot> outObjectStackSlots) Reserves a number of contiguous slots in the frame of the method being compiled.
FrameMap	buildFrameMap(LIRGenerationResult result, StackSlotAllocator allocator) Creates a FrameMap based on the information collected by this FrameMapBuilder.
void	callsMethod(CallingConvention cc) Informs the frame map that the compiled code calls a particular method, which may need stack space for outgoing arguments.
CodeCacheProvider	getCodeCache()
RegisterConfig	getRegisterConfig()

Method Detail

allocateSpillSlot

VirtualStackSlot allocateSpillSlot(LIRKind kind)

Reserves a spill slot in the frame of the method being compiled. The returned slot is aligned on its natural alignment, i.e., an 8-byte spill slot is aligned at an 8-byte boundary, unless overridden by a subclass.

Parameters:

kind - The kind of the spill slot to be reserved.

Returns:

A spill slot denoting the reserved memory area.

allocateStackSlots

VirtualStackSlot allocateStackSlots(int slots,
                                    BitSet objects,
                                    List<VirtualStackSlot> outObjectStackSlots)

Reserves a number of contiguous slots in the frame of the method being compiled. If the requested number of slots is 0, this method returns null.

Parameters:

slots - the number of slots to reserve

objects - specifies the indexes of the object pointer slots. The caller is responsible for guaranteeing that each such object pointer slot is initialized before any instruction that uses a reference map. Without this guarantee, the garbage collector could see garbage object values.

outObjectStackSlots - if non-null, the object pointer slots allocated are added to this list

Returns:

the first reserved stack slot (i.e., at the lowest address)

getRegisterConfig

RegisterConfig getRegisterConfig()

getCodeCache

CodeCacheProvider getCodeCache()

callsMethod

void callsMethod(CallingConvention cc)

Informs the frame map that the compiled code calls a particular method, which may need stack space for outgoing arguments.

Parameters:

cc - The calling convention for the called method.

buildFrameMap

FrameMap buildFrameMap(LIRGenerationResult result,
                       StackSlotAllocator allocator)

Creates a FrameMap based on the information collected by this FrameMapBuilder.