java.lang.Object
- proguard.classfile.instruction.Instruction
- - proguard.classfile.instruction.SimpleInstruction

```
public class SimpleInstruction
extends Instruction
```
This Instruction represents a simple instruction without variable arguments or constant pool references.

Field Summary

Fields
Modifier and Type Field Description

int constant
- Fields inherited from class proguard.classfile.instruction.Instruction
  ARRAY_T_BOOLEAN, ARRAY_T_BYTE, ARRAY_T_CHAR, ARRAY_T_DOUBLE, ARRAY_T_FLOAT, ARRAY_T_INT, ARRAY_T_LONG, ARRAY_T_SHORT, NAMES, OP_AALOAD, OP_AASTORE, OP_ACONST_NULL, OP_ALOAD, OP_ALOAD_0, OP_ALOAD_1, OP_ALOAD_2, OP_ALOAD_3, OP_ANEWARRAY, OP_ARETURN, OP_ARRAYLENGTH, OP_ASTORE, OP_ASTORE_0, OP_ASTORE_1, OP_ASTORE_2, OP_ASTORE_3, OP_ATHROW, OP_BALOAD, OP_BASTORE, OP_BIPUSH, OP_CALOAD, OP_CASTORE, OP_CHECKCAST, OP_D2F, OP_D2I, OP_D2L, OP_DADD, OP_DALOAD, OP_DASTORE, OP_DCMPG, OP_DCMPL, OP_DCONST_0, OP_DCONST_1, OP_DDIV, OP_DLOAD, OP_DLOAD_0, OP_DLOAD_1, OP_DLOAD_2, OP_DLOAD_3, OP_DMUL, OP_DNEG, OP_DREM, OP_DRETURN, OP_DSTORE, OP_DSTORE_0, OP_DSTORE_1, OP_DSTORE_2, OP_DSTORE_3, OP_DSUB, OP_DUP, OP_DUP_X1, OP_DUP_X2, OP_DUP2, OP_DUP2_X1, OP_DUP2_X2, OP_F2D, OP_F2I, OP_F2L, OP_FADD, OP_FALOAD, OP_FASTORE, OP_FCMPG, OP_FCMPL, OP_FCONST_0, OP_FCONST_1, OP_FCONST_2, OP_FDIV, OP_FLOAD, OP_FLOAD_0, OP_FLOAD_1, OP_FLOAD_2, OP_FLOAD_3, OP_FMUL, OP_FNEG, OP_FREM, OP_FRETURN, OP_FSTORE, OP_FSTORE_0, OP_FSTORE_1, OP_FSTORE_2, OP_FSTORE_3, OP_FSUB, OP_GETFIELD, OP_GETSTATIC, OP_GOTO, OP_GOTO_W, OP_I2B, OP_I2C, OP_I2D, OP_I2F, OP_I2L, OP_I2S, OP_IADD, OP_IALOAD, OP_IAND, OP_IASTORE, OP_ICONST_0, OP_ICONST_1, OP_ICONST_2, OP_ICONST_3, OP_ICONST_4, OP_ICONST_5, OP_ICONST_M1, OP_IDIV, OP_IFACMPEQ, OP_IFACMPNE, OP_IFEQ, OP_IFGE, OP_IFGT, OP_IFICMPEQ, OP_IFICMPGE, OP_IFICMPGT, OP_IFICMPLE, OP_IFICMPLT, OP_IFICMPNE, OP_IFLE, OP_IFLT, OP_IFNE, OP_IFNONNULL, OP_IFNULL, OP_IINC, OP_ILOAD, OP_ILOAD_0, OP_ILOAD_1, OP_ILOAD_2, OP_ILOAD_3, OP_IMUL, OP_INEG, OP_INSTANCEOF, OP_INVOKEDYNAMIC, OP_INVOKEINTERFACE, OP_INVOKESPECIAL, OP_INVOKESTATIC, OP_INVOKEVIRTUAL, OP_IOR, OP_IREM, OP_IRETURN, OP_ISHL, OP_ISHR, OP_ISTORE, OP_ISTORE_0, OP_ISTORE_1, OP_ISTORE_2, OP_ISTORE_3, OP_ISUB, OP_IUSHR, OP_IXOR, OP_JSR, OP_JSR_W, OP_L2D, OP_L2F, OP_L2I, OP_LADD, OP_LALOAD, OP_LAND, OP_LASTORE, OP_LCMP, OP_LCONST_0, OP_LCONST_1, OP_LDC, OP_LDC_W, OP_LDC2_W, OP_LDIV, OP_LLOAD, OP_LLOAD_0, OP_LLOAD_1, OP_LLOAD_2, OP_LLOAD_3, OP_LMUL, OP_LNEG, OP_LOOKUPSWITCH, OP_LOR, OP_LREM, OP_LRETURN, OP_LSHL, OP_LSHR, OP_LSTORE, OP_LSTORE_0, OP_LSTORE_1, OP_LSTORE_2, OP_LSTORE_3, OP_LSUB, OP_LUSHR, OP_LXOR, OP_MONITORENTER, OP_MONITOREXIT, OP_MULTIANEWARRAY, OP_NEW, OP_NEWARRAY, OP_NOP, OP_POP, OP_POP2, OP_PUTFIELD, OP_PUTSTATIC, OP_RET, OP_RETURN, OP_SALOAD, OP_SASTORE, OP_SIPUSH, OP_SWAP, OP_TABLESWITCH, OP_WIDE, opcode

Constructor Summary

Constructors
Constructor	Description
`SimpleInstruction()`	Creates an uninitialized SimpleInstruction.
`SimpleInstruction(byte opcode)`	Creates a new SimpleInstruction with the given opcode.
`SimpleInstruction(byte opcode, int constant)`	Creates a new SimpleInstruction with the given opcode and constant.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, InstructionVisitor instructionVisitor)`	Accepts the given visitor.
`byte`	`canonicalOpcode()`	Returns the canonical opcode of this instruction, i.e.
`SimpleInstruction`	`copy(SimpleInstruction simpleInstruction)`	Copies the given instruction into this instruction.
`boolean`	`equals(java.lang.Object o)`
`int`	`hashCode()`
`int`	`length(int offset)`	Returns the length in bytes of the instruction.
`protected void`	`readInfo(byte[] code, int offset)`	Reads the data following the instruction opcode.
`Instruction`	`shrink()`	Shrinks this instruction to its shortest possible form.
`int`	`stackEntryIndexBefore(Clazz clazz, int stackEntryIndexAfter)`	Returns the stack entry index from which the specified stack entry is copied by a dup/swap/checkcast instruction, or -1 otherwise.
`java.lang.String`	`toString()`
`protected void`	`writeInfo(byte[] code, int offset)`	Writes data following the instruction opcode.

Methods inherited from class proguard.classfile.instruction.Instruction
actualOpcode, getName, isCategory2, isWide, mayInstanceThrowExceptions, mayThrowExceptions, readByte, readInt, readShort, readSignedByte, readSignedShort, readSignedValue, readValue, stackPopCount, stackPushCount, toString, toString, write, write, writeByte, writeInt, writeShort, writeSignedByte, writeSignedShort, writeSignedValue, writeValue

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - constant
```
public int constant
```
- Constructor Detail
  - SimpleInstruction
```
public SimpleInstruction()
```
    Creates an uninitialized SimpleInstruction.
  - SimpleInstruction
```
public SimpleInstruction(byte opcode)
```
    Creates a new SimpleInstruction with the given opcode. Automatically extracts any embedded constant.
  - SimpleInstruction
```
public SimpleInstruction(byte opcode,
                         int constant)
```
    Creates a new SimpleInstruction with the given opcode and constant. Automatically adapts the opcode if it has an embedded constant and the constant lies within the supported range. If the constant doesn't lie within the supported range, it must be adapted before the instruction can be written out.
- Method Detail
  - copy
```
public SimpleInstruction copy(SimpleInstruction simpleInstruction)
```
    Copies the given instruction into this instruction.
    
    Parameters:
    
    simpleInstruction - the instruction to be copied.
    
    Returns:
    
    this instruction.
  - canonicalOpcode
```
public byte canonicalOpcode()
```
    Description copied from class: Instruction
    
    Returns the canonical opcode of this instruction, i.e. typically the opcode whose extension has been removed.
    
    Overrides:
    
    canonicalOpcode in class Instruction
  - shrink
```
public Instruction shrink()
```
    Description copied from class: Instruction
    
    Shrinks this instruction to its shortest possible form.
    
    Specified by:
    
    shrink in class Instruction
    
    Returns:
    
    this instruction.
  - readInfo
```
protected void readInfo(byte[] code,
                        int offset)
```
    Description copied from class: Instruction
    
    Reads the data following the instruction opcode.
    
    Specified by:
    
    readInfo in class Instruction
  - writeInfo
```
protected void writeInfo(byte[] code,
                         int offset)
```
    Description copied from class: Instruction
    
    Writes data following the instruction opcode.
    
    Specified by:
    
    writeInfo in class Instruction
  - length
```
public int length(int offset)
```
    Description copied from class: Instruction
    
    Returns the length in bytes of the instruction.
    
    Specified by:
    
    length in class Instruction
  - accept
```
public void accept(Clazz clazz,
                   Method method,
                   CodeAttribute codeAttribute,
                   int offset,
                   InstructionVisitor instructionVisitor)
```
    Description copied from class: Instruction
    
    Accepts the given visitor.
    
    Specified by:
    
    accept in class Instruction
  - stackEntryIndexBefore
```
public int stackEntryIndexBefore(Clazz clazz,
                                 int stackEntryIndexAfter)
```
    Description copied from class: Instruction
    Returns the stack entry index from which the specified stack entry is copied by a dup/swap/checkcast instruction, or -1 otherwise. Stack entry indices are counted from the top of the stack.
    
    checkcast: after: 0 (before: 0 ) -- not anymore
    dup: after: 0 0 (before: 0 )
    dup_x1: after: 0 1 0 (before: 1 0 )
    dup_x2: after: 0 2 1 0 (before: 2 1 0 )
    dup2: after: 1 0 1 0 (before: 1 0 )
    dup2_x1: after: 1 0 2 1 0 (before: 2 1 0 )
    dup2_x2: after: 1 0 3 2 1 0 (before: 3 2 1 0)
    Overrides:
    
    stackEntryIndexBefore in class Instruction
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object
  - equals
```
public boolean equals(java.lang.Object o)
```
    Specified by:
    
    equals in class Instruction
  - hashCode
```
public int hashCode()
```
    Specified by:
    
    hashCode in class Instruction

Class SimpleInstruction

Field Summary

Fields inherited from class proguard.classfile.instruction.Instruction

Constructor Summary

Method Summary

Methods inherited from class proguard.classfile.instruction.Instruction

Methods inherited from class java.lang.Object

Field Detail

constant

Constructor Detail

SimpleInstruction

SimpleInstruction

SimpleInstruction

Method Detail

copy

canonicalOpcode

shrink

readInfo

writeInfo

length

accept

stackEntryIndexBefore

toString

equals

hashCode