java.lang.Object
- com.tonic.analysis.ssa.lower.RegisterAllocator

public class RegisterAllocator
extends Object

Linear scan register allocator.

Constructor Summary

Constructors
Constructor Description

RegisterAllocator(IRMethod method, LivenessAnalysis liveness)
Creates an allocator; nothing is assigned until allocate() runs.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`allocate()`	Runs the linear scan, pinning parameters to the leading slots and letting later values reuse a slot only when no named source variable already owns it.
`Set<SSAValue>`	`getAffinityPinnedValues()`
`Map<SSAValue,Integer>`	`getAllocation()`
`Map<IRMethod.SourceLocal,Set<SSAValue>>`	`getHomeSlotGroups()`	The values sharing each source variable's home slot, phi results included.
`LivenessAnalysis`	`getLiveness()`
`int`	`getMaxLocals()`
`IRMethod`	`getMethod()`
`int`	`getRegister(SSAValue value)`	Looks up a value's slot, allocating a fresh one and growing max locals if the main pass missed it.
`int`	`getReservedSlotCount()`

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RegisterAllocator
```
public RegisterAllocator(IRMethod method,
                         LivenessAnalysis liveness)
```
    Creates an allocator; nothing is assigned until allocate() runs.
    
    Parameters:
    
    method - the method whose values need slots
    
    liveness - the liveness result driving interval construction
- Method Detail
  - getMethod
```
public IRMethod getMethod()
```
    Returns:
    
    the method
  - getLiveness
```
public LivenessAnalysis getLiveness()
```
    Returns:
    
    the liveness
  - getAllocation
```
public Map<SSAValue,Integer> getAllocation()
```
    Returns:
    
    the allocation
  - getMaxLocals
```
public int getMaxLocals()
```
    Returns:
    
    the max locals
  - getReservedSlotCount
```
public int getReservedSlotCount()
```
    Returns:
    
    the reserved slot count
  - allocate
```
public void allocate()
```
    Runs the linear scan, pinning parameters to the leading slots and letting later values reuse a slot only when no named source variable already owns it.
  - getHomeSlotGroups
```
public Map<IRMethod.SourceLocal,Set<SSAValue>> getHomeSlotGroups()
```
    The values sharing each source variable's home slot, phi results included.
    
    Returns:
    
    the live map from source variable to the values in its home slot
  - getAffinityPinnedValues
```
public Set<SSAValue> getAffinityPinnedValues()
```
    Returns:
    
    the affinity pinned values
  - getRegister
```
public int getRegister(SSAValue value)
```
    Looks up a value's slot, allocating a fresh one and growing max locals if the main pass missed it.
    
    Parameters:
    
    value - the value to look up
    
    Returns:
    
    the slot index

Class RegisterAllocator

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

RegisterAllocator

Method Detail

getMethod

getLiveness

getAllocation

getMaxLocals

getReservedSlotCount

allocate

getHomeSlotGroups

getAffinityPinnedValues

getRegister