org.graalvm.compiler.lir.stackslotalloc

Class LSStackSlotAllocator

java.lang.Object

org.graalvm.compiler.lir.phases.LIRPhase<AllocationPhase.AllocationContext>

org.graalvm.compiler.lir.phases.AllocationPhase

org.graalvm.compiler.lir.stackslotalloc.LSStackSlotAllocator

public final class LSStackSlotAllocator
extends AllocationPhase

Linear Scan stack slot allocator.

Remark: The analysis works under the assumption that a stack slot is no longer live after its last usage. If an instruction transfers the raw address of the stack slot to another location, e.g. a registers, and this location is referenced later on, the usage of the stack slot must be marked with the LIRInstruction.OperandFlag.UNINITIALIZED. Otherwise the stack slot might be reused and its content destroyed.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LSStackSlotAllocator.Options

Nested classes/interfaces inherited from class org.graalvm.compiler.lir.phases.AllocationPhase

AllocationPhase.AllocationContext

Nested classes/interfaces inherited from class org.graalvm.compiler.lir.phases.LIRPhase

LIRPhase.LIRPhaseStatistics

Field Summary

Fields inherited from class org.graalvm.compiler.lir.phases.LIRPhase

statisticsClassValue

Constructor Summary

Constructors

Constructor and Description
LSStackSlotAllocator()

Method Summary

Modifier and Type	Method and Description
static void	allocateStackSlots(FrameMapBuilderTool builder, LIRGenerationResult res)
protected void	run(TargetDescription target, LIRGenerationResult lirGenRes, AllocationPhase.AllocationContext context)

Methods inherited from class org.graalvm.compiler.lir.phases.LIRPhase

apply, apply, createName, createName, getLIRPhaseStatistics, getName

Methods inherited from class java.lang.Object

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

Constructor Detail

LSStackSlotAllocator

public LSStackSlotAllocator()

Method Detail

run

protected void run(TargetDescription target,
                   LIRGenerationResult lirGenRes,
                   AllocationPhase.AllocationContext context)

Specified by:

run in class LIRPhase<AllocationPhase.AllocationContext>

allocateStackSlots

public static void allocateStackSlots(FrameMapBuilderTool builder,
                                      LIRGenerationResult res)