IRGenOptions (Jikes RVM API)

java.lang.Object
- org.jikesrvm.compilers.opt.bc2ir.IRGenOptions

```
public final class IRGenOptions
extends Object
```
This class contains flags to control IR generation.

See Also:

BC2IR

Field Summary

Fields
Modifier and Type	Field and Description
`(package private) static boolean`	`CF_CHECKCAST` Control on constant folding during IR generation
`(package private) static boolean`	`CF_CHECKSTORE` Control on constant folding during IR generation
`(package private) static boolean`	`CF_DOUBLECMP` Control on constant folding during IR generation
`(package private) static boolean`	`CF_FLOATCMP` Control on constant folding during IR generation
`(package private) static boolean`	`CF_INSTANCEOF` Control on constant folding during IR generation
`(package private) static boolean`	`CF_INTIF` Control on constant folding during IR generation
`(package private) static boolean`	`CF_INTIFCMP` Control on constant folding during IR generation
`(package private) static boolean`	`CF_LONGCMP` Control on constant folding during IR generation
`(package private) static boolean`	`CF_LOOKUPSWITCH` Control on constant folding during IR generation
`(package private) static boolean`	`CF_REFIF` Control on constant folding during IR generation
`(package private) static boolean`	`CF_REFIFCMP` Control on constant folding during IR generation
`(package private) static boolean`	`CF_TABLESWITCH` Control on constant folding during IR generation
`(package private) static boolean`	`CP_IN_LOCALS` Do we allow constants to live in local variables?
`(package private) static boolean`	`DBG_ALL` Master debug flag for IR gen.
`(package private) static boolean`	`DBG_BB` Debug flag: basic blocks
`(package private) static boolean`	`DBG_BBSET` Debug flag: basic block set operations
`(package private) static boolean`	`DBG_BCPARSE` Debug flag: bytecode parsing
`(package private) static boolean`	`DBG_CF` Debug flag: control flow
`(package private) static boolean`	`DBG_CFG` Debug flag: cfg
`(package private) static boolean`	`DBG_ELIMCOPY` Debug flag: elim copy to locals
`(package private) static boolean`	`DBG_ELIMNULL` Debug flag: elim null checks
`(package private) static boolean`	`DBG_EX` Debug flag: exception handlers
`(package private) static boolean`	`DBG_FLATTEN` Debug flag: flattening
`(package private) static boolean`	`DBG_INLINE_JSR` Debug flag: jsr inlining
`(package private) static boolean`	`DBG_INSTR` Debug flag: print instructions as they are generated
`(package private) static boolean`	`DBG_LOCAL` Debug flag: local var rectification
`static boolean`	`DBG_OPERAND_LATTICE` Debug flag: operand lattice functions
`(package private) static boolean`	`DBG_REGEN` Debug flag: block regeneration
`(package private) static boolean`	`DBG_STACK` Debug flag: stack rectification
`static boolean`	`DBG_TYPE` Debug flag: type analysis
`(package private) static boolean`	`ELIM_COPY_LOCALS` Do we eliminate copies to local variables?
`(package private) static boolean`	`LOCALS_ON_STACK` Do we allow locals to live on the stack?
`(package private) static int`	`MAX_RETURN_ADDRESSES` How many return addresses will we allow in the local variables of a basic block before we decide that we should bail out to prevent exponential blowup in code space & compile time?

Constructor Summary

Constructors
Modifier Constructor and Description

private IRGenOptions()

Constructors
Modifier	Constructor and Description
`private`	`IRGenOptions()`

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - LOCALS_ON_STACK
```
static final boolean LOCALS_ON_STACK
```
    Do we allow locals to live on the stack?
    
    See Also:
    
    Constant Field Values
  - ELIM_COPY_LOCALS
```
static final boolean ELIM_COPY_LOCALS
```
    Do we eliminate copies to local variables?
    
    See Also:
    
    Constant Field Values
  - CP_IN_LOCALS
```
static final boolean CP_IN_LOCALS
```
    Do we allow constants to live in local variables?
    
    See Also:
    
    Constant Field Values
  - MAX_RETURN_ADDRESSES
```
static final int MAX_RETURN_ADDRESSES
```
    How many return addresses will we allow in the local variables of a basic block before we decide that we should bail out to prevent exponential blowup in code space & compile time?
    
    See Also:
    
    Constant Field Values
  - CF_TABLESWITCH
```
static final boolean CF_TABLESWITCH
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_LOOKUPSWITCH
```
static final boolean CF_LOOKUPSWITCH
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_CHECKCAST
```
static final boolean CF_CHECKCAST
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_CHECKSTORE
```
static final boolean CF_CHECKSTORE
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_INSTANCEOF
```
static final boolean CF_INSTANCEOF
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_INTIF
```
static final boolean CF_INTIF
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_INTIFCMP
```
static final boolean CF_INTIFCMP
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_REFIF
```
static final boolean CF_REFIF
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_REFIFCMP
```
static final boolean CF_REFIFCMP
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_LONGCMP
```
static final boolean CF_LONGCMP
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_FLOATCMP
```
static final boolean CF_FLOATCMP
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - CF_DOUBLECMP
```
static final boolean CF_DOUBLECMP
```
    Control on constant folding during IR generation
    
    See Also:
    
    Constant Field Values
  - DBG_ALL
```
static final boolean DBG_ALL
```
    Master debug flag for IR gen. Turns on all other IR gen debug flags.
    
    See Also:
    
    Constant Field Values
  - DBG_BB
```
static final boolean DBG_BB
```
    Debug flag: basic blocks
    
    See Also:
    
    Constant Field Values
  - DBG_BCPARSE
```
static final boolean DBG_BCPARSE
```
    Debug flag: bytecode parsing
    
    See Also:
    
    Constant Field Values
  - DBG_CF
```
static final boolean DBG_CF
```
    Debug flag: control flow
    
    See Also:
    
    Constant Field Values
  - DBG_INSTR
```
static final boolean DBG_INSTR
```
    Debug flag: print instructions as they are generated
    
    See Also:
    
    Constant Field Values
  - DBG_ELIMCOPY
```
static final boolean DBG_ELIMCOPY
```
    Debug flag: elim copy to locals
    
    See Also:
    
    Constant Field Values
  - DBG_ELIMNULL
```
static final boolean DBG_ELIMNULL
```
    Debug flag: elim null checks
    
    See Also:
    
    Constant Field Values
  - DBG_STACK
```
static final boolean DBG_STACK
```
    Debug flag: stack rectification
    
    See Also:
    
    Constant Field Values
  - DBG_LOCAL
```
static final boolean DBG_LOCAL
```
    Debug flag: local var rectification
    
    See Also:
    
    Constant Field Values
  - DBG_REGEN
```
static final boolean DBG_REGEN
```
    Debug flag: block regeneration
    
    See Also:
    
    Constant Field Values
  - DBG_OPERAND_LATTICE
```
public static final boolean DBG_OPERAND_LATTICE
```
    Debug flag: operand lattice functions
    
    See Also:
    
    Constant Field Values
  - DBG_CFG
```
static final boolean DBG_CFG
```
    Debug flag: cfg
    
    See Also:
    
    Constant Field Values
  - DBG_FLATTEN
```
static final boolean DBG_FLATTEN
```
    Debug flag: flattening
    
    See Also:
    
    Constant Field Values
  - DBG_EX
```
static final boolean DBG_EX
```
    Debug flag: exception handlers
    
    See Also:
    
    Constant Field Values
  - DBG_BBSET
```
static final boolean DBG_BBSET
```
    Debug flag: basic block set operations
    
    See Also:
    
    Constant Field Values
  - DBG_TYPE
```
public static final boolean DBG_TYPE
```
    Debug flag: type analysis
    
    See Also:
    
    Constant Field Values
  - DBG_INLINE_JSR
```
static final boolean DBG_INLINE_JSR
```
    Debug flag: jsr inlining
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - IRGenOptions
```
private IRGenOptions()
```

Class IRGenOptions

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

LOCALS_ON_STACK

ELIM_COPY_LOCALS

CP_IN_LOCALS

MAX_RETURN_ADDRESSES

CF_TABLESWITCH

CF_LOOKUPSWITCH

CF_CHECKCAST

CF_CHECKSTORE

CF_INSTANCEOF

CF_INTIF

CF_INTIFCMP

CF_REFIF

CF_REFIFCMP

CF_LONGCMP

CF_FLOATCMP

CF_DOUBLECMP

DBG_ALL

DBG_BB

DBG_BCPARSE

DBG_CF

DBG_INSTR

DBG_ELIMCOPY

DBG_ELIMNULL

DBG_STACK

DBG_LOCAL

DBG_REGEN

DBG_OPERAND_LATTICE

DBG_CFG

DBG_FLATTEN

DBG_EX

DBG_BBSET

DBG_TYPE

DBG_INLINE_JSR

Constructor Detail

IRGenOptions