java.lang.Object
- org.htmlunit.corejs.javascript.Icode
- - org.htmlunit.corejs.javascript.CodeGenerator

```
class CodeGenerator
extends Icode
```
Generates bytecode for the Interpreter.

Field Summary

Fields
Modifier and Type	Field	Description
`private ObjToIntMap`	`bigInts`
`private CompilerEnvirons`	`compilerEnv`
`private int`	`doubleTableTop`
`private static int`	`ECF_TAIL`
`private int`	`exceptionTableTop`
`private long[]`	`fixupTable`
`private int`	`fixupTableTop`
`private int`	`iCodeTop`
`private InterpreterData`	`itsData`
`private boolean`	`itsInFunctionFlag`
`private boolean`	`itsInTryFlag`
`private int[]`	`labelTable`
`private int`	`labelTableTop`
`private int`	`lineNumber`
`private ObjArray`	`literalIds`
`private int`	`localTop`
`private static int`	`MIN_FIXUP_TABLE_SIZE`
`private static int`	`MIN_LABEL_TABLE_SIZE`
`private ScriptNode`	`scriptOrFn`
`private int`	`stackDepth`
`private ObjToIntMap`	`strings`

Fields inherited from class org.htmlunit.corejs.javascript.Icode
Icode_CALLSPECIAL, Icode_CLOSURE_EXPR, Icode_CLOSURE_STMT, Icode_DEBUGGER, Icode_DELNAME, Icode_DUP, Icode_DUP2, Icode_ELEM_AND_THIS, Icode_ELEM_INC_DEC, Icode_ENTERDQ, Icode_GENERATOR, Icode_GENERATOR_END, Icode_GENERATOR_RETURN, Icode_GETVAR1, Icode_GOSUB, Icode_IFEQ_POP, Icode_INTNUMBER, Icode_LEAVEDQ, Icode_LINE, Icode_LITERAL_GETTER, Icode_LITERAL_NEW, Icode_LITERAL_SET, Icode_LITERAL_SETTER, Icode_LOCAL_CLEAR, Icode_NAME_AND_THIS, Icode_NAME_INC_DEC, Icode_ONE, Icode_POP, Icode_POP_RESULT, Icode_PROP_AND_THIS, Icode_PROP_INC_DEC, Icode_REF_INC_DEC, Icode_REG_BIGINT_C0, Icode_REG_BIGINT_C1, Icode_REG_BIGINT_C2, Icode_REG_BIGINT_C3, Icode_REG_BIGINT1, Icode_REG_BIGINT2, Icode_REG_BIGINT4, Icode_REG_IND_C0, Icode_REG_IND_C1, Icode_REG_IND_C2, Icode_REG_IND_C3, Icode_REG_IND_C4, Icode_REG_IND_C5, Icode_REG_IND1, Icode_REG_IND2, Icode_REG_IND4, Icode_REG_STR_C0, Icode_REG_STR_C1, Icode_REG_STR_C2, Icode_REG_STR_C3, Icode_REG_STR1, Icode_REG_STR2, Icode_REG_STR4, Icode_RETSUB, Icode_RETUNDEF, Icode_SCOPE_LOAD, Icode_SCOPE_SAVE, Icode_SETCONST, Icode_SETCONSTVAR, Icode_SETCONSTVAR1, Icode_SETVAR1, Icode_SHORTNUMBER, Icode_SPARE_ARRAYLIT, Icode_STARTSUB, Icode_SWAP, Icode_TAIL_CALL, Icode_TEMPLATE_LITERAL_CALLSITE, Icode_TYPEOFNAME, Icode_UNDEF, Icode_VALUE_AND_THIS, Icode_VAR_INC_DEC, Icode_YIELD_STAR, Icode_ZERO, MIN_ICODE

Constructor Summary

Constructors
Constructor Description

CodeGenerator()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`private void`	`addBackwardGoto(int gotoOp, int jumpPC)`
`private void`	`addBigInt(java.math.BigInteger n)`
`private void`	`addExceptionHandler(int icodeStart, int icodeEnd, int handlerStart, boolean isFinally, int exceptionObjectLocal, int scopeLocal)`
`private void`	`addGoto(Node target, int gotoOp)`
`private void`	`addGotoOp(int gotoOp)`
`private void`	`addIcode(int icode)`
`private void`	`addIndexOp(int op, int index)`
`private void`	`addIndexPrefix(int index)`
`private void`	`addInt(int i)`
`private void`	`addStringOp(int op, java.lang.String str)`
`private void`	`addStringPrefix(java.lang.String str)`
`private void`	`addToken(int token)`
`private void`	`addUint16(int value)`
`private void`	`addUint8(int value)`
`private void`	`addVarOp(int op, int varIndex)`
`private int`	`allocLocal()`
`private static java.lang.RuntimeException`	`badTree(Node node)`
`InterpreterData`	`compile(CompilerEnvirons compilerEnv, ScriptNode tree, java.lang.String encodedSource, boolean returnFunction)`
`private void`	`fixLabelGotos()`
`private void`	`generateCallFunAndThis(Node left)`
`private void`	`generateFunctionICode()`
`private void`	`generateICodeFromTree(Node tree)`
`private void`	`generateNestedFunctions()`
`private void`	`generateRegExpLiterals()`
`private void`	`generateTemplateLiterals()`
`private int`	`getDoubleIndex(double num)`
`private static int`	`getLocalBlockRef(Node node)`
`private int`	`getTargetLabel(Node target)`
`private byte[]`	`increaseICodeCapacity(int extraSize)`
`private void`	`markTargetLabel(Node target)`
`private void`	`releaseLocal(int localSlot)`
`private void`	`resolveForwardGoto(int fromPC)`
`private void`	`resolveGoto(int fromPC, int jumpPC)`
`private void`	`stackChange(int change)`
`private void`	`updateLineNumber(Node node)`
`private void`	`visitArrayComprehension(Node node, Node initStmt, Node expr)`
`private void`	`visitExpression(Node node, int contextFlags)`
`private void`	`visitIncDec(Node node, Node child)`
`private void`	`visitLiteral(Node node, Node child)`
`private void`	`visitStatement(Node node, int initialStackDepth)`
`private void`	`visitTemplateLiteral(Node node)`

Methods inherited from class org.htmlunit.corejs.javascript.Icode
bytecodeName, validBytecode, validIcode, validTokenCode

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

Field Detail

MIN_LABEL_TABLE_SIZE
```
private static final int MIN_LABEL_TABLE_SIZE
```
See Also:

Constant Field Values

MIN_FIXUP_TABLE_SIZE
```
private static final int MIN_FIXUP_TABLE_SIZE
```
See Also:

Constant Field Values

compilerEnv
```
private CompilerEnvirons compilerEnv
```

itsInFunctionFlag
```
private boolean itsInFunctionFlag
```

itsInTryFlag
```
private boolean itsInTryFlag
```

itsData
```
private InterpreterData itsData
```

scriptOrFn
```
private ScriptNode scriptOrFn
```

iCodeTop
```
private int iCodeTop
```

stackDepth
```
private int stackDepth
```

lineNumber
```
private int lineNumber
```

doubleTableTop
```
private int doubleTableTop
```

strings
```
private ObjToIntMap strings
```

bigInts
```
private ObjToIntMap bigInts
```

localTop
```
private int localTop
```

labelTable
```
private int[] labelTable
```

labelTableTop
```
private int labelTableTop
```

fixupTable
```
private long[] fixupTable
```

fixupTableTop
```
private int fixupTableTop
```

literalIds
```
private ObjArray literalIds
```

exceptionTableTop
```
private int exceptionTableTop
```

ECF_TAIL
```
private static final int ECF_TAIL
```
See Also:

Constant Field Values

Constructor Detail
- CodeGenerator
```
CodeGenerator()
```

Method Detail

compile

public InterpreterData compile(CompilerEnvirons compilerEnv,
                               ScriptNode tree,
                               java.lang.String encodedSource,
                               boolean returnFunction)

generateFunctionICode
```
private void generateFunctionICode()
```

generateICodeFromTree

private void generateICodeFromTree(Node tree)

generateNestedFunctions

private void generateNestedFunctions()

generateRegExpLiterals
```
private void generateRegExpLiterals()
```

generateTemplateLiterals

private void generateTemplateLiterals()

updateLineNumber

private void updateLineNumber(Node node)

badTree

private static java.lang.RuntimeException badTree(Node node)

visitStatement

private void visitStatement(Node node,
                            int initialStackDepth)

visitExpression

private void visitExpression(Node node,
                             int contextFlags)

generateCallFunAndThis

private void generateCallFunAndThis(Node left)

visitIncDec

private void visitIncDec(Node node,
                         Node child)

visitLiteral

private void visitLiteral(Node node,
                          Node child)

visitTemplateLiteral

private void visitTemplateLiteral(Node node)

visitArrayComprehension

private void visitArrayComprehension(Node node,
                                     Node initStmt,
                                     Node expr)

getLocalBlockRef

private static int getLocalBlockRef(Node node)

getTargetLabel

private int getTargetLabel(Node target)

markTargetLabel

private void markTargetLabel(Node target)

addGoto

private void addGoto(Node target,
                     int gotoOp)

fixLabelGotos
```
private void fixLabelGotos()
```

addBackwardGoto

private void addBackwardGoto(int gotoOp,
                             int jumpPC)

resolveForwardGoto

private void resolveForwardGoto(int fromPC)

resolveGoto

private void resolveGoto(int fromPC,
                         int jumpPC)

addToken
```
private void addToken(int token)
```

addIcode
```
private void addIcode(int icode)
```

addUint8
```
private void addUint8(int value)
```

addUint16
```
private void addUint16(int value)
```

addInt
```
private void addInt(int i)
```

getDoubleIndex

private int getDoubleIndex(double num)

addGotoOp

private void addGotoOp(int gotoOp)

addVarOp

private void addVarOp(int op,
                      int varIndex)

addStringOp

private void addStringOp(int op,
                         java.lang.String str)

addIndexOp

private void addIndexOp(int op,
                        int index)

addStringPrefix

private void addStringPrefix(java.lang.String str)

addBigInt

private void addBigInt(java.math.BigInteger n)

addIndexPrefix

private void addIndexPrefix(int index)

addExceptionHandler

private void addExceptionHandler(int icodeStart,
                                 int icodeEnd,
                                 int handlerStart,
                                 boolean isFinally,
                                 int exceptionObjectLocal,
                                 int scopeLocal)

increaseICodeCapacity

private byte[] increaseICodeCapacity(int extraSize)

stackChange

private void stackChange(int change)

allocLocal
```
private int allocLocal()
```

releaseLocal

private void releaseLocal(int localSlot)

Class CodeGenerator

Field Summary

Fields inherited from class org.htmlunit.corejs.javascript.Icode

Constructor Summary

Method Summary

Methods inherited from class org.htmlunit.corejs.javascript.Icode

Methods inherited from class java.lang.Object

Field Detail

MIN_LABEL_TABLE_SIZE

MIN_FIXUP_TABLE_SIZE

compilerEnv

itsInFunctionFlag

itsInTryFlag

itsData

scriptOrFn

iCodeTop

stackDepth

lineNumber

doubleTableTop

strings

bigInts

localTop

labelTable

labelTableTop

fixupTable

fixupTableTop

literalIds

exceptionTableTop

ECF_TAIL

Constructor Detail

CodeGenerator

Method Detail

compile

generateFunctionICode

generateICodeFromTree

generateNestedFunctions

generateRegExpLiterals

generateTemplateLiterals

updateLineNumber

badTree

visitStatement

visitExpression

generateCallFunAndThis

visitIncDec

visitLiteral

visitTemplateLiteral

visitArrayComprehension

getLocalBlockRef

getTargetLabel

markTargetLabel

addGoto

fixLabelGotos

addBackwardGoto

resolveForwardGoto

resolveGoto

addToken

addIcode

addUint8

addUint16

addInt

getDoubleIndex

addGotoOp

addVarOp

addStringOp

addIndexOp

addStringPrefix

addBigInt

addIndexPrefix

addExceptionHandler

increaseICodeCapacity

stackChange

allocLocal

releaseLocal