[Vm-dev] VM Maker: MethodMassage-cb.42.mcz

11 Apr 2024


      Eliot Miranda uploaded a new version of MethodMassage to project VM Maker:
http://source.squeak.org/VMMaker/MethodMassage-cb.42.mcz
==================== Summary ====================
Name: MethodMassage-cb.42
Author: cb
Time: 20 March 2017, 2:11:48.55594 pm
UUID: 833c3eea-44e5-46cb-b8d6-6b2b80c29b90
Ancestors: MethodMassage-cb.41
fixed recursive CompiledBlock
==================== Snapshot ====================
SystemOrganization addCategory: #'MethodMassage-Coverage'!
SystemOrganization addCategory: #'MethodMassage-Kernel'!
SystemOrganization addCategory: #'MethodMassage-Tests'!
Object subclass: #AssemblerEncoderInterface
    instanceVariableNames: 'assembler encoder'
    classVariableNames: 'SpecialSelectors'
    poolDictionaries: ''
    category: 'MethodMassage-Kernel'!
!AssemblerEncoderInterface commentStamp: 'eem 2/22/2013 13:10' prior: 0!
An AssemblerEncoderInterface is an abstract superclass for the interfaces between a BytecodeAssembler and a BytecodeEncoder.  These interfaces convert the assembly messages (see CompiledMethod>>abstractBytecodeMessages and InstructionStream interpretNextInstructionFor: et al) to the sizing and emitting messages implemented by BytecodeEncoder's subclasses.
Instance Variables
    assembler:		<BytecodeAssembler>
    encoder:		<BytecodeEncoder>!
----- Method: AssemblerEncoderInterface class>>assembler:encoder: (in category 'instance creation') -----
assembler: anAssembler encoder: anEncoder
    ^self new assembler: anAssembler encoder: anEncoder!
----- Method: AssemblerEncoderInterface class>>copySizeCodeToEmitterCode (in category 'class initialization') -----
copySizeCodeToEmitterCode
    "AssemblerEncoderInterface copySizeCodeToEmitterCode"
    BytecodeSizer selectorsAndMethodsDo:
    	[:s :m| | emitterMethod |
    	((m literals includes: #shouldBeImplemented) not
    	and: [(emitterMethod := BytecodeEmitter compiledMethodAt: s) literals includes: #shouldBeImplemented]) ifTrue:
    		[BytecodeEmitter
    			compile:
    				(m getSourceFromFile asString
    					copyReplaceAll: 'encoder size'
    					with: 'encoder gen')
    				classified: #assembly]]!
----- Method: AssemblerEncoderInterface class>>createCodeSkeletons (in category 'class initialization') -----
createCodeSkeletons
    "BytecodeSizer createCodeSkeletons"
    "BytecodeEmitter createCodeSkeletons"
    InstructionClient selectorsAndMethodsDo:
    	[:s :m|
    	Parser new
    		initPattern: m getSourceFromFile asString
    		notifying: nil
    		return:
    			[:tuple|
    			[:sel :args :precedence|
    			self compile:
    				(String streamContents:
    					[:strm|
    					precedence = 1
    						ifTrue: [strm nextPutAll: sel]
    						ifFalse:
    							[sel keywords with: args do:
    								[:kw :arg|
    								strm nextPutAll: kw; space; nextPutAll: arg; space].
    							 strm skip: -1].
    					strm crtab; nextPutAll: 'self shouldBeImplemented'])
    				classified: #assembly.
    			] valueWithArguments: tuple]]!
----- Method: AssemblerEncoderInterface class>>initialize (in category 'class initialization') -----
initialize
    "AssemblerEncoderInterface initialize"
    SpecialSelectors := IdentityDictionary new.
    1 to: Smalltalk specialSelectorSize do:
    	[:i | SpecialSelectors at: (Smalltalk specialSelectorAt: i) put: i]!
----- Method: AssemblerEncoderInterface>>assembler (in category 'accessing') -----
assembler
    "Answer the value of assembler"
^ assembler!
----- Method: AssemblerEncoderInterface>>assembler: (in category 'accessing') -----
assembler: anObject
    "Set the value of assembler"
assembler := anObject!
----- Method: AssemblerEncoderInterface>>assembler:encoder: (in category 'initialize-release') -----
assembler: anAssembler encoder: anEncoder
    assembler := anAssembler.
    encoder := anEncoder!
----- Method: AssemblerEncoderInterface>>encoder (in category 'accessing') -----
encoder
    "Answer the value of encoder"
^ encoder!
----- Method: AssemblerEncoderInterface>>encoder: (in category 'accessing') -----
encoder: anObject
    "Set the value of encoder"
encoder := anObject!
AssemblerEncoderInterface subclass: #BytecodeEmitter
    instanceVariableNames: ''
    classVariableNames: ''
    poolDictionaries: ''
    category: 'MethodMassage-Kernel'!
!BytecodeEmitter commentStamp: 'eem 2/22/2013 11:18' prior: 0!
A BytecodeEmitter converts the assembly messages (see CompiledMethod>>abstractBytecodeMessages and InstructionStream interpretNextInstructionFor: et al) and sends them to the corresponding emitting messages implemented by BytecodeEncoder's subclasses.
Instance Variables: see superclass!
----- Method: BytecodeEmitter>>blockReturnConstant: (in category 'assembly') -----
blockReturnConstant: aLiteral
    "Rubbish way of handling special constants."
    ^[encoder genReturnSpecialLiteralToCaller: aLiteral]
    	on: Error
    	do: [:ex| ex return: (self pushLiteral: aLiteral) + self blockReturnTop]!
----- Method: BytecodeEmitter>>blockReturnTop (in category 'assembly') -----
blockReturnTop
    ^encoder genReturnTopToCaller!
----- Method: BytecodeEmitter>>branchIfInstanceOf:distance: (in category 'assembly') -----
branchIfInstanceOf: aLiteral distance: distance
    | litIndex |
    litIndex := encoder litIndexOrNilFor: aLiteral.
    litIndex ifNil:
    	[litIndex := encoder litIndex: aLiteral].
    ^ encoder genBranchIfInstanceOf: litIndex distance: distance orNot: false!
----- Method: BytecodeEmitter>>branchIfNotInstanceOf:distance: (in category 'assembly') -----
branchIfNotInstanceOf: behaviorOrArrayOfBehavior distance: jumpDistance
    | litIndex |
    litIndex := encoder litIndexOrNilFor: behaviorOrArrayOfBehavior.
    litIndex ifNil:
    	[litIndex := encoder litIndex: behaviorOrArrayOfBehavior].
    ^encoder genBranchIfNotInstanceOf: litIndex distance: jumpDistance!
----- Method: BytecodeEmitter>>callInlinePrimitive: (in category 'assembly') -----
callInlinePrimitive: primitiveIndex
    ^encoder genCallInlinePrimitive: primitiveIndex!
----- Method: BytecodeEmitter>>callPrimitive: (in category 'assembly') -----
callPrimitive: primitiveIndex
    ^encoder genCallPrimitive: primitiveIndex!
----- Method: BytecodeEmitter>>directedSuperSend:numArgs: (in category 'assembly') -----
directedSuperSend: selector numArgs: nArgs
    ^encoder genSendDirectedSuper: (encoder sharableLitIndex: selector) numArgs: nArgs!
----- Method: BytecodeEmitter>>doDup (in category 'assembly') -----
doDup
    ^encoder genDup!
----- Method: BytecodeEmitter>>doPop (in category 'assembly') -----
doPop
    ^encoder genPop!
----- Method: BytecodeEmitter>>extA: (in category 'assembly') -----
extA: anInteger 
    ^encoder genUnsignedSingleExtendA: anInteger!
----- Method: BytecodeEmitter>>extB: (in category 'assembly') -----
extB: anInteger 
    ^encoder genUnsignedSingleExtendB: anInteger!
----- Method: BytecodeEmitter>>jump: (in category 'assembly') -----
jump: offsetOrLabel
    | offset |
    offset := (assembler isLabel: offsetOrLabel)
    			ifTrue: [assembler spanToLabel: offsetOrLabel]
    			ifFalse: [offsetOrLabel].
    ^encoder genJump: offset!
----- Method: BytecodeEmitter>>jump:if: (in category 'assembly') -----
jump: offsetOrLabel if: condition
    | offset |
    offset := (assembler isLabel: offsetOrLabel)
    			ifTrue: [assembler spanToLabel: offsetOrLabel]
    			ifFalse: [offsetOrLabel].
    condition
    	ifTrue: [encoder genBranchPopTrue: offset]
    	ifFalse: [encoder genBranchPopFalse: offset]!
----- Method: BytecodeEmitter>>jumpLong: (in category 'assembly') -----
jumpLong: offsetOrLabel
    | offset |
    offset := (assembler isLabel: offsetOrLabel)
    			ifTrue: [assembler spanToLabel: offsetOrLabel]
    			ifFalse: [offsetOrLabel].
    ^encoder genJumpLong: offset!
----- Method: BytecodeEmitter>>jumpLong:if: (in category 'assembly') -----
jumpLong: offsetOrLabel if: condition
    | offset |
    offset := (assembler isLabel: offsetOrLabel)
    			ifTrue: [assembler spanToLabel: offsetOrLabel]
    			ifFalse: [offsetOrLabel].
    ^condition
    	ifTrue: [encoder genBranchPopTrueLong: offset]
    	ifFalse: [encoder genBranchPopFalseLong: offset]!
----- Method: BytecodeEmitter>>methodReturnConstant: (in category 'assembly') -----
methodReturnConstant: aLiteral
    "Rubbish way of handling special constants."
    ^[encoder genReturnSpecialLiteral: aLiteral]
    	on: Error
    	do: [:ex| ex return: (self pushLiteral: aLiteral) + self methodReturnTop]!
----- Method: BytecodeEmitter>>methodReturnReceiver (in category 'assembly') -----
methodReturnReceiver
    ^encoder genReturnReceiver!
----- Method: BytecodeEmitter>>methodReturnTop (in category 'assembly') -----
methodReturnTop
    ^encoder genReturnTop!
----- Method: BytecodeEmitter>>popIntoLiteralVariable: (in category 'assembly') -----
popIntoLiteralVariable: aLiteral
    | litIndex |
    litIndex := encoder litIndexOrNilFor: aLiteral.
    litIndex ifNil:
    	[litIndex := encoder litIndex: aLiteral].
    ^encoder genStorePopLiteralVar: litIndex!
----- Method: BytecodeEmitter>>popIntoLiteralVariableAtIndex: (in category 'assembly') -----
popIntoLiteralVariableAtIndex: litIndex
    ^encoder genStorePopLiteralVar: litIndex!
----- Method: BytecodeEmitter>>popIntoReceiverVariable: (in category 'assembly') -----
popIntoReceiverVariable: offsetOrName
    | offset |
    offset := offsetOrName isInteger
    			ifTrue: [offsetOrName]
    			ifFalse: [assembler offsetForInstVarName: offsetOrName].
    "handle context inst var access"
    ^(assembler shouldUseLongAccessForInstVarOffset: offset)
    	ifTrue: [encoder genStorePopInstVarLong: offset]
    	ifFalse: [encoder genStorePopInstVar: offset]!
----- Method: BytecodeEmitter>>popIntoRemoteTemp:inVectorAt: (in category 'assembly') -----
popIntoRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex
    ^encoder genStorePopRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex!
----- Method: BytecodeEmitter>>popIntoTemporaryVariable: (in category 'assembly') -----
popIntoTemporaryVariable: offset
    encoder genStorePopTemp: offset!
----- Method: BytecodeEmitter>>pushActiveContext (in category 'assembly') -----
pushActiveContext
    ^encoder genPushThisContext!
----- Method: BytecodeEmitter>>pushClosureCopyNumCopiedValues:numArgs:blockSize: (in category 'assembly') -----
pushClosureCopyNumCopiedValues: numCopied numArgs: numArgs blockSize: blockSizeOrLabel
    "N.B. If blockSizeOrLabel is a label it is expected be a label after the
     last return in the block and before the bytecode following the block."
    | blockSize |
    blockSize := (assembler isLabel: blockSizeOrLabel)
    				ifTrue: [assembler spanToBlockLabel: blockSizeOrLabel]
    				ifFalse: [blockSizeOrLabel].
    ^encoder genPushClosureCopyNumCopiedValues: numCopied numArgs: numArgs jumpSize: blockSize!
----- Method: BytecodeEmitter>>pushClosureTemps: (in category 'assembly') -----
pushClosureTemps: numTemps
    ^encoder genPushNClosureTemps: numTemps!
----- Method: BytecodeEmitter>>pushConsArrayWithElements: (in category 'assembly') -----
pushConsArrayWithElements: numElements
    ^encoder genPushConsArray: numElements!
----- Method: BytecodeEmitter>>pushConstant: (in category 'assembly') -----
pushConstant: aLiteral
    | litIndex |
    litIndex := encoder litIndexOrNilFor: aLiteral.
    litIndex ifNil:
    	["rubbish way of handling special literals"
    	 ([encoder genPushSpecialLiteral: aLiteral]
    			on: Error
    			do: [:ex| ex return: nil]) ifNotNil:
    		[^self].
    	 litIndex := encoder litIndex: aLiteral].
    ^encoder genPushLiteral: litIndex!
----- Method: BytecodeEmitter>>pushConstantAtIndex: (in category 'assembly') -----
pushConstantAtIndex: literalIndex
    ^encoder genPushLiteral: literalIndex!
----- Method: BytecodeEmitter>>pushFullClosure:numCopied: (in category 'assembly') -----
pushFullClosure: compiledBlockLiteralIndex numCopied: numCopied
    ^encoder genPushFullClosure: compiledBlockLiteralIndex numCopied: numCopied!
----- Method: BytecodeEmitter>>pushLiteralVariable: (in category 'assembly') -----
pushLiteralVariable: aLiteral
    | litIndex |
    litIndex := encoder litIndexOrNilFor: aLiteral.
    litIndex ifNil:
    	[litIndex := encoder litIndex: aLiteral].
    ^encoder genPushLiteralVar: litIndex!
----- Method: BytecodeEmitter>>pushLiteralVariableAtIndex: (in category 'assembly') -----
pushLiteralVariableAtIndex: litIndex
    ^encoder genPushLiteralVar: litIndex!
----- Method: BytecodeEmitter>>pushNewArrayOfSize: (in category 'assembly') -----
pushNewArrayOfSize: numElements
    ^encoder genPushNewArray: numElements!
----- Method: BytecodeEmitter>>pushReceiver (in category 'assembly') -----
pushReceiver
    ^encoder genPushReceiver!
----- Method: BytecodeEmitter>>pushReceiverVariable: (in category 'assembly') -----
pushReceiverVariable: offsetOrName
    | offset |
    offset := offsetOrName isInteger
    			ifTrue: [offsetOrName]
    			ifFalse: [assembler offsetForInstVarName: offsetOrName].
    "handle context inst var access"
    ^(assembler shouldUseLongAccessForInstVarOffset: offset)
    	ifTrue: [encoder genPushInstVarLong: offset]
    	ifFalse: [encoder genPushInstVar: offset]!
----- Method: BytecodeEmitter>>pushRemoteTemp:inVectorAt: (in category 'assembly') -----
pushRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex
    ^encoder genPushRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex!
----- Method: BytecodeEmitter>>pushSpecialConstant: (in category 'assembly') -----
pushSpecialConstant: aLiteral 
    ^encoder genPushSpecialLiteral: aLiteral!
----- Method: BytecodeEmitter>>pushTemporaryVariable: (in category 'assembly') -----
pushTemporaryVariable: offset
    ^encoder genPushTemp: offset!
----- Method: BytecodeEmitter>>send:super:numArgs: (in category 'assembly') -----
send: selector super: supered numArgs: nArgs
    supered ifFalse:
    	[(SpecialSelectors at: selector ifAbsent: []) ifNotNil:
    		[:specialSelectorIndex|
    		 ^encoder genSendSpecial: specialSelectorIndex numArgs: nArgs].
    	^encoder genSend: (encoder sharableLitIndex: selector) numArgs: nArgs].
    ^encoder genSendSuper: (encoder sharableLitIndex: selector) numArgs: nArgs!
----- Method: BytecodeEmitter>>sendToAbsentDynamicSuperclass:numArgs: (in category 'assembly') -----
sendToAbsentDynamicSuperclass: selector numArgs: numArgs
    ^encoder genSendAbsentDynamicSuper: (encoder sharableLitIndex: selector) numArgs: numArgs!
----- Method: BytecodeEmitter>>sendToAbsentImplicitReceiver:numArgs: (in category 'assembly') -----
sendToAbsentImplicitReceiver: selector numArgs: numArgs
    ^encoder genSendAbsentImplicit: (encoder sharableLitIndex: selector) numArgs: numArgs!
----- Method: BytecodeEmitter>>storeIntoLiteralVariable: (in category 'assembly') -----
storeIntoLiteralVariable: aLiteral
    | litIndex |
    litIndex := encoder litIndexOrNilFor: aLiteral.
    litIndex ifNil:
    	[litIndex := encoder litIndex: aLiteral].
    ^encoder genStoreLiteralVar: litIndex!
----- Method: BytecodeEmitter>>storeIntoLiteralVariableAtIndex: (in category 'assembly') -----
storeIntoLiteralVariableAtIndex: litIndex
    ^encoder genStoreLiteralVar: litIndex!
----- Method: BytecodeEmitter>>storeIntoReceiverVariable: (in category 'assembly') -----
storeIntoReceiverVariable: offsetOrName
    | offset |
    offset := offsetOrName isInteger
    			ifTrue: [offsetOrName]
    			ifFalse: [assembler offsetForInstVarName: offsetOrName].
    "handle context inst var access"
    ^(assembler shouldUseLongAccessForInstVarOffset: offset)
    	ifTrue: [encoder genStoreInstVarLong: offset]
    	ifFalse: [encoder genStoreInstVar: offset]!
----- Method: BytecodeEmitter>>storeIntoRemoteTemp:inVectorAt: (in category 'assembly') -----
storeIntoRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex
    ^encoder genStoreRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex!
----- Method: BytecodeEmitter>>storeIntoTemporaryVariable: (in category 'assembly') -----
storeIntoTemporaryVariable: offset
    ^encoder genStoreTemp: offset!
----- Method: BytecodeEmitter>>trap (in category 'assembly') -----
trap
    ^encoder genTrap!
AssemblerEncoderInterface subclass: #BytecodeSizer
    instanceVariableNames: ''
    classVariableNames: ''
    poolDictionaries: ''
    category: 'MethodMassage-Kernel'!
!BytecodeSizer commentStamp: 'eem 2/22/2013 11:18' prior: 0!
A BytecodeSizer converts the assembly messages (see CompiledMethod>>abstractBytecodeMessages and InstructionStream interpretNextInstructionFor: et al) and sends them to the corresponding sizing messages implemented by BytecodeEncoder's subclasses.
Instance Variables: see superclass!
----- Method: BytecodeSizer>>blockReturnConstant: (in category 'assembly') -----
blockReturnConstant: aLiteral
    "Rubbish way of handling special constants."
    ^[encoder sizeReturnSpecialLiteralToCaller: aLiteral]
    	on: Error
    	do: [:ex| ex return: (self pushLiteral: aLiteral) + self blockReturnTop]!
----- Method: BytecodeSizer>>blockReturnTop (in category 'assembly') -----
blockReturnTop
    ^encoder sizeReturnTopToCaller!
----- Method: BytecodeSizer>>branchIfInstanceOf:distance: (in category 'assembly') -----
branchIfInstanceOf: aLiteral distance: distance
    | litIndex |
    litIndex := encoder litIndexOrNilFor: aLiteral.
    litIndex ifNil:
    	[litIndex := encoder litIndex: aLiteral].
    ^encoder sizeBranchIfInstanceOf: litIndex distance: distance orNot: false!
----- Method: BytecodeSizer>>branchIfNotInstanceOf:distance: (in category 'assembly') -----
branchIfNotInstanceOf: behaviorOrArrayOfBehavior distance: jumpDistance
    | litIndex |
    litIndex := encoder litIndexOrNilFor: behaviorOrArrayOfBehavior.
    litIndex ifNil:
    	[litIndex := encoder litIndex: behaviorOrArrayOfBehavior].
    ^encoder sizeBranchIfNotInstanceOf: litIndex distance: jumpDistance!
----- Method: BytecodeSizer>>callInlinePrimitive: (in category 'assembly') -----
callInlinePrimitive: primitiveIndex
    ^encoder sizeCallInlinePrimitive: primitiveIndex!
----- Method: BytecodeSizer>>callPrimitive: (in category 'assembly') -----
callPrimitive: primitiveIndex
    ^encoder sizeCallPrimitive: primitiveIndex!
----- Method: BytecodeSizer>>directedSuperSend:numArgs: (in category 'assembly') -----
directedSuperSend: selector numArgs: nArgs
    ^encoder sizeSendDirectedSuper: (encoder sharableLitIndex: selector) numArgs: nArgs!
----- Method: BytecodeSizer>>doDup (in category 'assembly') -----
doDup
    ^encoder sizeDup!
----- Method: BytecodeSizer>>doPop (in category 'assembly') -----
doPop
    ^encoder sizePop!
----- Method: BytecodeSizer>>extA: (in category 'assembly') -----
extA: anInteger 
    ^encoder sizeUnsignedSingleExtendA: anInteger!
----- Method: BytecodeSizer>>extB: (in category 'assembly') -----
extB: anInteger 
    ^encoder sizeUnsignedSingleExtendB: anInteger!
----- Method: BytecodeSizer>>jump: (in category 'assembly') -----
jump: offsetOrLabel
    | offset |
    offset := (assembler isLabel: offsetOrLabel)
    			ifTrue: [assembler spanToLabel: offsetOrLabel]
    			ifFalse: [offsetOrLabel].
    ^offset
    	ifNotNil: [encoder sizeJump: offset]
    	ifNil: ["If this is a backward jump that is as-yet unsized, answer the long backward jump size.
    		   c.f. e.g. MessageNode>>#sizeCodeForWhile:value:"
    		  offsetOrLabel value <= assembler index ifTrue:
    			[encoder sizeJumpLong: -1]]!
----- Method: BytecodeSizer>>jump:if: (in category 'assembly') -----
jump: offsetOrLabel if: condition
    | offset |
    offset := (assembler isLabel: offsetOrLabel)
    			ifTrue: [assembler spanToLabel: offsetOrLabel]
    			ifFalse: [offsetOrLabel].
    ^offset ifNotNil:
    	[condition
    		ifTrue: [encoder sizeBranchPopTrue: offset]
    		ifFalse: [encoder sizeBranchPopFalse: offset]]!
----- Method: BytecodeSizer>>jumpLong: (in category 'assembly') -----
jumpLong: offsetOrLabel
    | offset |
    offset := (assembler isLabel: offsetOrLabel)
    			ifTrue: [assembler spanToLabel: offsetOrLabel]
    			ifFalse: [offsetOrLabel].
    ^offset ifNotNil:
    	[encoder sizeJumpLong: offset]!
----- Method: BytecodeSizer>>jumpLong:if: (in category 'assembly') -----
jumpLong: offsetOrLabel if: condition
    | offset |
    offset := (assembler isLabel: offsetOrLabel)
    			ifTrue: [assembler spanToLabel: offsetOrLabel]
    			ifFalse: [offsetOrLabel].
    ^offset ifNotNil:
    	[condition
    		ifTrue: [encoder sizeBranchPopTrueLong: offset]
    		ifFalse: [encoder sizeBranchPopFalseLong: offset]]!
----- Method: BytecodeSizer>>methodReturnConstant: (in category 'assembly') -----
methodReturnConstant: aLiteral
    "Rubbish way of handling special constants."
    ^[encoder sizeReturnSpecialLiteral: aLiteral]
    	on: Error
    	do: [:ex| ex return: (self pushLiteral: aLiteral) + self methodReturnTop]!
----- Method: BytecodeSizer>>methodReturnReceiver (in category 'assembly') -----
methodReturnReceiver
    ^encoder sizeReturnReceiver!
----- Method: BytecodeSizer>>methodReturnTop (in category 'assembly') -----
methodReturnTop
    ^encoder sizeReturnTop!
----- Method: BytecodeSizer>>popIntoLiteralVariable: (in category 'assembly') -----
popIntoLiteralVariable: aLiteral
    | litIndex |
    litIndex := encoder litIndexOrNilFor: aLiteral.
    litIndex ifNil:
    	[litIndex := encoder litIndex: aLiteral].
    ^encoder sizeStorePopLiteralVar: litIndex!
----- Method: BytecodeSizer>>popIntoLiteralVariableAtIndex: (in category 'assembly') -----
popIntoLiteralVariableAtIndex: litIndex
    ^encoder sizeStorePopLiteralVar: litIndex!
----- Method: BytecodeSizer>>popIntoReceiverVariable: (in category 'assembly') -----
popIntoReceiverVariable: offsetOrName
    | offset |
    offset := offsetOrName isInteger
    			ifTrue: [offsetOrName]
    			ifFalse: [assembler offsetForInstVarName: offsetOrName].
    "handle context inst var access"
    ^(assembler shouldUseLongAccessForInstVarOffset: offset)
    	ifTrue: [encoder sizeStorePopInstVarLong: offset]
    	ifFalse: [encoder sizeStorePopInstVar: offset]!
----- Method: BytecodeSizer>>popIntoRemoteTemp:inVectorAt: (in category 'assembly') -----
popIntoRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex
    ^encoder sizePushRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex!
----- Method: BytecodeSizer>>popIntoTemporaryVariable: (in category 'assembly') -----
popIntoTemporaryVariable: offset
    ^encoder sizeStorePopTemp: offset!
----- Method: BytecodeSizer>>pushActiveContext (in category 'assembly') -----
pushActiveContext
    ^encoder sizePushThisContext!
----- Method: BytecodeSizer>>pushClosureCopyNumCopiedValues:numArgs:blockSize: (in category 'assembly') -----
pushClosureCopyNumCopiedValues: numCopied numArgs: numArgs blockSize: blockSizeOrLabel
    "N.B. If blockSizeOrLabel is a label it is expected be a label after the
     last return in the block and before the bytecode following the block."
    | blockSize |
    blockSize := (assembler isLabel: blockSizeOrLabel)
    				ifTrue: [assembler spanToBlockLabel: blockSizeOrLabel]
    				ifFalse: [blockSizeOrLabel].
    ^blockSize ifNotNil:
    	[encoder sizePushClosureCopyNumCopiedValues: numCopied numArgs: numArgs jumpSize: blockSize]!
----- Method: BytecodeSizer>>pushClosureTemps: (in category 'assembly') -----
pushClosureTemps: numTemps
    ^encoder sizePushNClosureTemps: numTemps!
----- Method: BytecodeSizer>>pushConsArrayWithElements: (in category 'assembly') -----
pushConsArrayWithElements: numElements
    ^encoder sizePushConsArray: numElements!
----- Method: BytecodeSizer>>pushConstant: (in category 'assembly') -----
pushConstant: aLiteral
    | litIndex |
    litIndex := encoder litIndexOrNilFor: aLiteral.
    litIndex ifNil:
    	["rubbish way of handling special literals"
    	 [(encoder sizePushSpecialLiteral: aLiteral) ifNotNil:
    		[:size| ^size]]
    		on: Error
    		do: [:ex| ].
    	 litIndex := encoder litIndex: aLiteral].
    ^encoder sizePushLiteral: litIndex!
----- Method: BytecodeSizer>>pushConstantAtIndex: (in category 'assembly') -----
pushConstantAtIndex: literalIndex
    ^encoder sizePushLiteral: literalIndex!
----- Method: BytecodeSizer>>pushFullClosure:numCopied: (in category 'assembly') -----
pushFullClosure: compiledBlockLiteralIndex numCopied: numCopied
    ^encoder sizePushFullClosure: compiledBlockLiteralIndex numCopied: numCopied!
----- Method: BytecodeSizer>>pushFullClosure:numCopied:receiverOnStack:ignoreOuterContext: (in category 'assembly') -----
pushFullClosure: compiledBlockLiteralIndex numCopied: numCopied receiverOnStack: rcvrOnStack ignoreOuterContext: ignoreOuterContext
    ^encoder sizePushFullClosure: compiledBlockLiteralIndex numCopied: numCopied receiverOnStack: rcvrOnStack ignoreOuterContext: ignoreOuterContext!
----- Method: BytecodeSizer>>pushLiteralVariable: (in category 'assembly') -----
pushLiteralVariable: aLiteral
    | litIndex |
    litIndex := encoder litIndexOrNilFor: aLiteral.
    litIndex ifNil:
    	[litIndex := encoder litIndex: aLiteral].
    ^encoder sizePushLiteralVar: litIndex!
----- Method: BytecodeSizer>>pushLiteralVariableAtIndex: (in category 'assembly') -----
pushLiteralVariableAtIndex: litIndex
    ^encoder sizePushLiteralVar: litIndex!
----- Method: BytecodeSizer>>pushNewArrayOfSize: (in category 'assembly') -----
pushNewArrayOfSize: numElements
    ^encoder sizePushNewArray: numElements!
----- Method: BytecodeSizer>>pushReceiver (in category 'assembly') -----
pushReceiver
    ^encoder sizePushReceiver!
----- Method: BytecodeSizer>>pushReceiverVariable: (in category 'assembly') -----
pushReceiverVariable: offsetOrName
    | offset |
    offset := offsetOrName isInteger
    			ifTrue: [offsetOrName]
    			ifFalse: [assembler offsetForInstVarName: offsetOrName].
    "handle context inst var access"
    ^(assembler shouldUseLongAccessForInstVarOffset: offset)
    	ifTrue: [encoder sizePushInstVarLong: offset]
    	ifFalse: [encoder sizePushInstVar: offset]!
----- Method: BytecodeSizer>>pushRemoteTemp:inVectorAt: (in category 'assembly') -----
pushRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex
    ^encoder sizePushRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex!
----- Method: BytecodeSizer>>pushSpecialConstant: (in category 'assembly') -----
pushSpecialConstant: aLiteral 
    ^encoder sizePushSpecialLiteral: aLiteral!
----- Method: BytecodeSizer>>pushTemporaryVariable: (in category 'assembly') -----
pushTemporaryVariable: offset
    ^encoder sizePushTemp: offset!
----- Method: BytecodeSizer>>send:super:numArgs: (in category 'assembly') -----
send: selector super: supered numArgs: nArgs
    supered ifFalse:
    	[(SpecialSelectors at: selector ifAbsent: []) ifNotNil:
    		[:specialSelectorIndex|
    		 ^encoder sizeSpecialSend: specialSelectorIndex numArgs: nArgs].
    	^encoder sizeSend: (encoder sharableLitIndex: selector) numArgs: nArgs].
    ^encoder sizeSendSuper: (encoder sharableLitIndex: selector) numArgs: nArgs!
----- Method: BytecodeSizer>>sendToAbsentDynamicSuperclass:numArgs: (in category 'assembly') -----
sendToAbsentDynamicSuperclass: selector numArgs: numArgs
    ^encoder sizeSendAbsentDynamicSuper: (encoder sharableLitIndex: selector) numArgs: numArgs!
----- Method: BytecodeSizer>>sendToAbsentImplicitReceiver:numArgs: (in category 'assembly') -----
sendToAbsentImplicitReceiver: selector numArgs: numArgs
    ^encoder sizeSendAbsentImplicit: (encoder sharableLitIndex: selector) numArgs: numArgs!
----- Method: BytecodeSizer>>storeIntoLiteralVariable: (in category 'assembly') -----
storeIntoLiteralVariable: aLiteral
    | litIndex |
    litIndex := encoder litIndexOrNilFor: aLiteral.
    litIndex ifNil:
    	[litIndex := encoder litIndex: aLiteral].
    ^encoder sizeStoreLiteralVar: litIndex!
----- Method: BytecodeSizer>>storeIntoLiteralVariableAtIndex: (in category 'assembly') -----
storeIntoLiteralVariableAtIndex: litIndex
    ^encoder sizeStoreLiteralVar: litIndex!
----- Method: BytecodeSizer>>storeIntoReceiverVariable: (in category 'assembly') -----
storeIntoReceiverVariable: offsetOrName
    | offset |
    offset := offsetOrName isInteger
    			ifTrue: [offsetOrName]
    			ifFalse: [assembler offsetForInstVarName: offsetOrName].
    "handle context inst var access"
    ^(assembler shouldUseLongAccessForInstVarOffset: offset)
    	ifTrue: [encoder sizeStoreInstVarLong: offset]
    	ifFalse: [encoder sizeStoreInstVar: offset]!
----- Method: BytecodeSizer>>storeIntoRemoteTemp:inVectorAt: (in category 'assembly') -----
storeIntoRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex
    ^encoder sizeStoreRemoteTemp: remoteTempIndex inVectorAt: tempVectorIndex!
----- Method: BytecodeSizer>>storeIntoTemporaryVariable: (in category 'assembly') -----
storeIntoTemporaryVariable: offset
    ^encoder sizeStoreTemp: offset!
----- Method: BytecodeSizer>>trap (in category 'assembly') -----
trap
    ^encoder sizeTrap!
----- Method: BytecodeSizer>>trapIfNotInstanceOf: (in category 'assembly') -----
trapIfNotInstanceOf: behaviorOrArrayOfBehavior
    | litIndex |
    litIndex := encoder litIndexOrNilFor: behaviorOrArrayOfBehavior.
    litIndex ifNil:
    	[litIndex := encoder litIndex: behaviorOrArrayOfBehavior].
    ^encoder sizeTrapIfNotInstanceOf: litIndex!
Object subclass: #AssemblerMethod
    instanceVariableNames: 'literals instructions numArgs numTemps frameSize primitive flag signFlag trailer methodClass selector compiledMethodClass fixLabels encoder'
    classVariableNames: ''
    poolDictionaries: ''
    category: 'MethodMassage-Kernel'!
!AssemblerMethod commentStamp: 'eem 8/7/2014 11:51' prior: 0!
An AssemblerMethod is a holder for a sequence of literals and a sequence of instructions which can represent a disassembled method, or a method being assembled.  AssemblerMethod supports three modes of operation.
The first mode is transcription, CompiledMethod -> AssemblerMethod -> CompiledMethod.
e.g.
    | original "CompiledMethod"
      assembler "AssemblerMethod"
      replica "CompiledMethod" |
    original := Object >> #printOn:.
    assembler := original disassemble.
    replica := assembler assemble.
    self assert: original = replica
The second mode is to construct an AssemblerMethod and assemble it.  e.g.
    EncoderForSistaV1 assembler
    	pushReceiver;
    	trapIfNotInstanceOf: {SmallInteger. Character. LargePositiveInteger. LargeNegativeInteger.
    						   Integer. Fraction. Magnitude};
    	pushReceiver;
    	methodReturnTop;
    	assemble
AssemblerMethod new
    	methodClass: Object;
    	selector: #printOn:;
    	numArgs: 1;
    	numTemps: 2;
    	pushReceiver;
    	send: #class;
    	send: #name;
    	popIntoTemporaryVariable: 1;
    	pushTemporaryVariable: 0;
    	doDup;
    	pushTemporaryVariable: 1;
    	send: #first;
    	send: #isVowel;
    	jump: 'L1' if: false;
    	pushConstant: 'an ';
    	jump: 'L2';
    	label: 'L1';
    	pushConstant: 'a ';
    	label: 'L2';
    	send: #nextPutAll:;
    	doPop;
    	pushTemporaryVariable: 1;
    	send: #nextPutAll:;
    	doPop;
    	methodReturnReceiver;
    	assemble
A third mode, useful for storage, inter-image transporation ,etc, is AssemblerMethod -> executable string -> AssemblerMethod.
e.g.
    | original "CompiledMethod"
      assembler "AssemblerMethod"
      assemblerText "String"
      replica "CompiledMethod" |
    original := Object >> #printOn:.
    assembler := original disassemble.
    assemblerText := assembler assemblerString.
    replica := (Compiler evaluate: assemblerText) assemble.
    self assert: original = replica
Instance Variables
    fixLabels:		<UndefinedObject|Boolean>
    flag:			<Boolean>
    frameSize:		<Integer>
    instructions:	<SequenceableCollection>
    literals:			<SequenceableCollection>
    methodClass:	<Behavior>
    numArgs:		<Integer>
    numTemps:		<Integer>
    primitive:		<Integer>
    signFlag:		<Boolean>
    trailer:			<CompiledMethodTrailer>
fixLabels
    - if nil, the AssemblerMethod is being used in transcription mode and branch offsets should be integers.
      if a boolean then it indicates whether instructions contains one or more instructions that need their branches fixing up.
flag
    - the value of the method's header flag (see CompiledMethod>>flag)
frameSize
    - the size of the method's frame (see CompiledMethod>>frameSize)
instructions
    - the sequence of Message and LookupKey objects making up the method's instructions
literals
    - the sequence of objects making up the method's literals
methodClass
    - the target class for the method (see CompiledMethod>>methodClass)
numArgs
    - the method's argument count (see CompiledMethod>>numArgs)
numTemps
    - the method's temporary count (see CompiledMethod>>numTemps)
primitive
    - the method's primitive (see CompiledMethod>>primitive)
signFlag
    - the value of the method's signFlag (see CompiledMethod>>signFlag)
trailer
    - the method;s trailer (see CompiledMethod>>trailer)
!
----- Method: AssemblerMethod class>>literals:instructions:numArgs:numTemps:frameSize:primitive:flag:signFlag:trailer:methodClass:selector:compiledMethodClass: (in category 'instance creation') -----
literals: literalSequence instructions: instructionSequence numArgs: nArgs numTemps: nTemps frameSize: frameSizeNum primitive: primitiveIndex flag: flagBoolean signFlag: signFlagBoolean trailer: methodTrailer methodClass: class selector: aSelector compiledMethodClass: classOfCompiledMethod
    ^self new literals: literalSequence instructions: instructionSequence numArgs: nArgs numTemps: nTemps frameSize: frameSizeNum primitive: primitiveIndex flag: flagBoolean signFlag: signFlagBoolean trailer: methodTrailer methodClass: class selector: aSelector compiledMethodClass: classOfCompiledMethod!
----- Method: AssemblerMethod>>assemble (in category 'assembling') -----
assemble
    | assembler |
    assembler := BytecodeAssembler new.
    encoder ifNotNil: [assembler encoder: encoder].
    ^assembler assemble: self!
----- Method: AssemblerMethod>>assemblerString (in category 'printing') -----
assemblerString
    ^String streamContents: [:s| self printAsAssemblerOn: s]!
----- Method: AssemblerMethod>>binding: (in category 'assembling') -----
binding: aSymbol
    "For now, if the binding is not found, answer a fake binding rather than enter into Undeclared."
    self literal: ((methodClass bindingOf: aSymbol) ifNil:
    				[Transcript cr; print: 'warning: ', aSymbol, ' is unbound'.
    				 aSymbol -> nil])!
----- Method: AssemblerMethod>>callInlinePrimitive: (in category 'assembling') -----
callInlinePrimitive: primNumber
    instructions addLast: (Message
    							selector: #callPrimitive:
    							argument: primNumber + 32768)!
----- Method: AssemblerMethod>>checkLabel: (in category 'private') -----
checkLabel: label
    fixLabels ifNotNil:
    	[label isInteger
    		ifTrue: [self error: 'one cannot use integers as labels in assembler mode. integers are interpreted as branch distances']
    		ifFalse: [fixLabels := true]]!
----- Method: AssemblerMethod>>compiledMethodClass (in category 'accessing') -----
compiledMethodClass
    "Answer the value of compiledMethodClass"
^ compiledMethodClass!
----- Method: AssemblerMethod>>compiledMethodClass: (in category 'accessing') -----
compiledMethodClass: anObject
    "Set the value of compiledMethodClass"
compiledMethodClass := anObject!
----- Method: AssemblerMethod>>directedSuperSend: (in category 'assembling-shorthand') -----
directedSuperSend: aSelector
    self directedSuperSend: aSelector numArgs: aSelector numArgs!
----- Method: AssemblerMethod>>doesNotUnderstand: (in category 'assembling') -----
doesNotUnderstand: aMessage
    (BytecodeSizer includesSelector: aMessage selector) ifFalse:
    	[^super doesNotUnderstand: aMessage].
    aMessage lookupClass: nil.
    instructions addLast: aMessage!
----- Method: AssemblerMethod>>dup (in category 'assembling-shorthand') -----
dup
    "For compatibility with InstructionPrinter output"
    ^self doDup!
----- Method: AssemblerMethod>>encoder (in category 'accessing') -----
encoder
    ^encoder!
----- Method: AssemblerMethod>>encoder: (in category 'accessing') -----
encoder: anObject
    encoder := anObject!
----- Method: AssemblerMethod>>extA: (in category 'assembling') -----
extA: anInteger 
    instructions addLast: (Message selector: #extA: argument: anInteger)!
----- Method: AssemblerMethod>>extB: (in category 'assembling') -----
extB: anInteger 
    instructions addLast: (Message selector: #extB: argument: anInteger)!
----- Method: AssemblerMethod>>fixLabelsIfNecessary (in category 'private') -----
fixLabelsIfNecessary
    | map |
    fixLabels ~~ true ifTrue: [^self].
    map := Dictionary new.
    instructions do:
    	[:inst|
    	(self isLabel: inst) ifTrue:
    		[map at: inst key put: inst]].
    instructions do:
    	[:inst|
    	((self isLabel: inst) not
    	 and: [#(jump: jump:if: jumpLong: jumpLong:if:
    			pushClosureCopyNumCopiedValues:numArgs:blockSize:) includes: inst selector]) ifTrue:
    		[inst selector first = $j
    			ifTrue:
    				[inst arguments first isInteger ifFalse:
    					[inst arguments at: 1 put: (map at: inst arguments first)]]
    			ifFalse:
    				[inst arguments last isInteger ifFalse:
    					[inst arguments at: inst numArgs put: (map at: inst arguments last)]]]].
    fixLabels := false!
----- Method: AssemblerMethod>>flag (in category 'accessing') -----
flag
    "Answer the value of flag"
^ flag!
----- Method: AssemblerMethod>>flag: (in category 'accessing') -----
flag: anObject
    "Set the value of flag"
flag := anObject!
----- Method: AssemblerMethod>>frameSize (in category 'accessing') -----
frameSize
    "Answer the value of frameSize"
^ frameSize!
----- Method: AssemblerMethod>>frameSize: (in category 'accessing') -----
frameSize: anObject
    "Set the value of frameSize"
frameSize := anObject!
----- Method: AssemblerMethod>>initialize (in category 'initialize-release') -----
initialize
    fixLabels := false.
    compiledMethodClass := CompiledMethod.
    instructions := OrderedCollection new.
    literals := OrderedCollection new.
    frameSize := thisContext method frameSize. "should be small"
    flag := signFlag := false.
    numArgs := numTemps := primitive := 0!
----- Method: AssemblerMethod>>instructions (in category 'accessing') -----
instructions
    "Answer the value of instructions"
    self fixLabelsIfNecessary.
    ^instructions!
----- Method: AssemblerMethod>>instructions: (in category 'accessing') -----
instructions: anObject
    "Set the value of instructions"
instructions := anObject!
----- Method: AssemblerMethod>>isLabel: (in category 'private') -----
isLabel: aMessageOrLookupKey
    ^aMessageOrLookupKey isVariableBinding!
----- Method: AssemblerMethod>>jump: (in category 'assembling') -----
jump: label
    self checkLabel: label.
    instructions addLast: (Message
    									selector: #jump:
    									argument: label)!
----- Method: AssemblerMethod>>jump:if: (in category 'assembling') -----
jump: label if: cond
    self checkLabel: label.
    instructions addLast: (Message
    									selector: #jump:if:
    									arguments: {label. cond})!
----- Method: AssemblerMethod>>jumpFalse: (in category 'assembling-shorthand') -----
jumpFalse: label
    "For compatibility with InstructionPrinter output"
    ^self jump: label if: false!
----- Method: AssemblerMethod>>jumpLong: (in category 'assembling') -----
jumpLong: label
    self checkLabel: label.
    instructions addLast: (Message
    									selector: #jumpLong:
    									argument: label)!
----- Method: AssemblerMethod>>jumpLong:if: (in category 'assembling') -----
jumpLong: label if: cond
    self checkLabel: label.
    instructions addLast: (Message
    									selector: #jumpLong:if:
    									arguments: {label. cond})!
----- Method: AssemblerMethod>>jumpTrue: (in category 'assembling-shorthand') -----
jumpTrue: label
    "For compatibility with InstructionPrinter output"
    ^self jump: label if: true!
----- Method: AssemblerMethod>>label: (in category 'assembling') -----
label: aString 
    instructions addLast: aString -> nil!
----- Method: AssemblerMethod>>labels (in category 'accessing') -----
labels
    ^instructions select: [:ea| ea isVariableBinding]!
----- Method: AssemblerMethod>>literal: (in category 'assembling') -----
literal: aLiteral
    literals addLast: aLiteral!
----- Method: AssemblerMethod>>literals (in category 'accessing') -----
literals
    "Answer the value of literals"
^ literals!
----- Method: AssemblerMethod>>literals: (in category 'accessing') -----
literals: anObject
    "Set the value of literals"
literals := anObject!
----- Method: AssemblerMethod>>literals:instructions:numArgs:numTemps:frameSize:primitive:flag:signFlag:trailer:methodClass:selector:compiledMethodClass: (in category 'initialize-release') -----
literals: literalSequence instructions: instructionSequence numArgs: nArgs numTemps: nTemps frameSize: frameSizeNum primitive: primitiveIndex flag: flagBoolean signFlag: signFlagBoolean trailer: methodTrailer methodClass: class selector: aSelector compiledMethodClass: classOfCompiledMethod
    literals := literalSequence.
    instructions := instructionSequence.
    numArgs := nArgs.
    numTemps := nTemps.
    frameSize := frameSizeNum.
    primitive := primitiveIndex.
    flag := flagBoolean.
    signFlag := signFlagBoolean.
    trailer := methodTrailer.
    methodClass := class.
    selector := aSelector.
    compiledMethodClass := classOfCompiledMethod!
----- Method: AssemblerMethod>>methodClass (in category 'accessing') -----
methodClass
    "Answer the value of methodClass"
^ methodClass!
----- Method: AssemblerMethod>>methodClass: (in category 'accessing') -----
methodClass: anObject
    "Set the value of methodClass"
methodClass := anObject!
----- Method: AssemblerMethod>>numArgs (in category 'accessing') -----
numArgs
    "Answer the value of numArgs"
^ numArgs!
----- Method: AssemblerMethod>>numArgs: (in category 'accessing') -----
numArgs: anObject
    "Set the value of numArgs"
numArgs := anObject!
----- Method: AssemblerMethod>>numTemps (in category 'accessing') -----
numTemps
    "Answer the value of numTemps"
^ numTemps!
----- Method: AssemblerMethod>>numTemps: (in category 'accessing') -----
numTemps: anObject
    "Set the value of numTemps"
numTemps := anObject!
----- Method: AssemblerMethod>>pop (in category 'assembling-shorthand') -----
pop
    "For compatibility with InstructionPrinter output"
    ^self doPop!
----- Method: AssemblerMethod>>popIntoLiteralVariableAtIndex: (in category 'assembling') -----
popIntoLiteralVariableAtIndex: litIndex
    instructions addLast: (Message
    									selector: #popIntoLiteralVariableAtIndex:
    									argument: litIndex)!
----- Method: AssemblerMethod>>popIntoTemp: (in category 'assembling-shorthand') -----
popIntoTemp: n
    "For compatibility with InstructionPrinter output"
    ^self popIntoTemporaryVariable: n!
----- Method: AssemblerMethod>>primitive (in category 'accessing') -----
primitive
    "Answer the value of primitive"
^ primitive!
----- Method: AssemblerMethod>>primitive: (in category 'accessing') -----
primitive: anObject
    "Set the value of primitive"
primitive := anObject!
----- Method: AssemblerMethod>>printAccessorsForAssemblyOn: (in category 'printing') -----
printAccessorsForAssemblyOn: aStream
    | dummy |
    dummy := self class new.
    "Generate all the accessors; for now don't handle the trailer"
    #(			compiledMethodClass: methodClass: selector: primitive:
    			numArgs: numTemps: frameSize: flag: signFlag: trailerData:)
    	with: #(	compiledMethodClass methodClass selector primitive
    			numArgs numTemps frameSize flag signFlag trailerData)
    	do: [:setter :getter|
    		(self perform: getter) ifNotNil:
    			[:val|
    			val ~= (dummy perform: getter) ifTrue:
    				[aStream crtab; nextPutAll: setter; space; print: val; nextPut: $;]]]!
----- Method: AssemblerMethod>>printAsAssemblerOn: (in category 'printing') -----
printAsAssemblerOn: aStream
    aStream nextPut: $(; print: self class; nextPutAll: ' new'.
self printAccessorsForAssemblyOn: aStream.
    self printLiteralsForAssemblyOn: aStream.
    self printInstructionsForAssemblyOn: aStream.
aStream crtab; nextPutAll: #yourself; nextPut: $)!
----- Method: AssemblerMethod>>printInstructionsForAssemblyOn: (in category 'printing') -----
printInstructionsForAssemblyOn: aStream
    instructions do:
    	[:messageOrLabel|
    	aStream crtab.
    	(self isLabel: messageOrLabel)
    		ifTrue:
    			[aStream nextPutAll: 'label: '; print: messageOrLabel key]
    		ifFalse:
    			[messageOrLabel numArgs = 0
    				ifTrue: [aStream nextPutAll: messageOrLabel selector]
    				ifFalse:
    					[messageOrLabel selector keywords with: messageOrLabel arguments do:
    						[:kwd :arg|
    						aStream nextPutAll: kwd; space.
    						aStream print: ((kwd = 'jump:' or: [kwd = 'blockSize:'])
    											ifTrue: [self assert: (self isLabel: arg).
    													arg key]
    											ifFalse: [arg]); space].
    					aStream skip: -1]].
    	aStream nextPut: $;]!
----- Method: AssemblerMethod>>printLiteralsForAssemblyOn: (in category 'printing') -----
"protocol: printing"
printLiteralsForAssemblyOn: aStream
    | literalsToDefine |
    literalsToDefine := literals copy asOrderedCollection.
    (literalsToDefine last isVariableBinding
     and: [literalsToDefine last value = methodClass]) ifTrue:
    	[literalsToDefine removeLast.
    	 self assert: (literalsToDefine last == selector
    				  or: [literalsToDefine last isMethodProperties
    					  and: [literalsToDefine last selector == selector]]).
    	 literalsToDefine removeLast].
    literalsToDefine do:
    	[:litOrBinding|
    	aStream crtab.
    	litOrBinding isLiteral
    		ifTrue: [aStream nextPutAll: 'literal: '; print: litOrBinding]
    		ifFalse: [
    			litOrBinding isCompiledMethod 
    				ifTrue: [ aStream nextPutAll: 'literal: '; print: nil "a post-process pass will fix this" ]
    				ifFalse:
    					[litOrBinding class == AssemblerMethod "Is there a better way of testing this ?"
    						ifFalse: [
    							litOrBinding isVariableBinding 
    								ifTrue: [aStream nextPutAll: 'binding: '; store: litOrBinding key] 
    								ifFalse: [litOrBinding key == #SoDeoptMetadata 
    											ifTrue: [ aStream nextPutAll: 'literal: #DeoptMetadata' ]
    											ifFalse: [ 
    												(litOrBinding isCompiledCode 
    												and: [ litOrBinding isCompiledBlock ])
    													ifFalse: [
    													self assert: (litOrBinding isBehavior 
    													or: [litOrBinding class == Point 
    													or: [litOrBinding isArray 
    														and: [litOrBinding allSatisfy: [:b | b isBehavior]]]]). 
    											aStream nextPutAll: 'literal: '; store: litOrBinding ]]]]
    						ifTrue: 
    							[aStream nextPutAll: 'literal: '.
    							 aStream nextPut: $(.
    							 litOrBinding printAsAssemblerOn: aStream.
    							 aStream nextPut: $)]]].
    	aStream nextPut: $;]!
----- Method: AssemblerMethod>>push: (in category 'assembling-shorthand') -----
push: aLiteral
    "Convenience for pushLiteral:.  Won't work unless an encoder has been set."
    "For compatibility with InstructionPrinter output"
    ^(encoder isSpecialLiteralForPush: aLiteral)
    	ifTrue: [self pushSpecialConstant: aLiteral]
    	ifFalse: [self pushConstant: aLiteral]!
----- Method: AssemblerMethod>>pushClosureCopyNumCopiedValues:numArgs:blockSize: (in category 'assembling') -----
pushClosureCopyNumCopiedValues: numCopied numArgs: numArgs blockSize: blockSize
    "N.B. If blockSizeOrLabel is a label it is expected be a label after the
     last return in the block and before the bytecode following the block."
    self checkLabel: blockSize.
    instructions addLast: (Message
    									selector: #pushClosureCopyNumCopiedValues:numArgs:blockSize:
    									arguments: {numCopied. numArgs. blockSize})!
----- Method: AssemblerMethod>>pushConstantAtIndex: (in category 'assembling') -----
pushConstantAtIndex: litIndex
    instructions addLast: (Message
    									selector: #pushConstantAtIndex:
    									argument: litIndex)!
----- Method: AssemblerMethod>>pushLiteralVariableAtIndex: (in category 'assembling') -----
pushLiteralVariableAtIndex: litIndex
    instructions addLast: (Message
    									selector: #pushLiteralVariableAtIndex:
    									argument: litIndex)!
----- Method: AssemblerMethod>>pushSpecialConstant: (in category 'assembling') -----
pushSpecialConstant: aConstant
    instructions addLast: (Message
    									selector: #pushSpecialConstant:
    									argument: aConstant)!
----- Method: AssemblerMethod>>pushTemp: (in category 'assembling-shorthand') -----
pushTemp: n
    "For compatibility with InstructionPrinter output"
    ^self pushTemporaryVariable: n!
----- Method: AssemblerMethod>>selector (in category 'accessing') -----
selector
    "Answer the value of selector"
^ selector!
----- Method: AssemblerMethod>>selector: (in category 'accessing') -----
selector: anObject
    "Set the value of selector"
selector := anObject!
----- Method: AssemblerMethod>>send: (in category 'assembling-shorthand') -----
send: aSelector
    "For compatibility with InstructionPrinter output"
    self send: aSelector super: false numArgs: aSelector numArgs!
----- Method: AssemblerMethod>>sendToAbsentImplicitReceiver: (in category 'assembling-shorthand') -----
sendToAbsentImplicitReceiver: aSelector
    self sendToAbsentImplicitReceiver: aSelector numArgs: aSelector numArgs!
----- Method: AssemblerMethod>>signFlag (in category 'accessing') -----
signFlag
    "Answer the value of signFlag"
^ signFlag!
----- Method: AssemblerMethod>>signFlag: (in category 'accessing') -----
signFlag: anObject
    "Set the value of signFlag"
signFlag := anObject!
----- Method: AssemblerMethod>>storeIntoLiteralVariableAtIndex: (in category 'assembling') -----
storeIntoLiteralVariableAtIndex: litIndex
    instructions addLast: (Message
    									selector: #storeIntoLiteralVariableAtIndex:
    									argument: litIndex)!
----- Method: AssemblerMethod>>superSend: (in category 'assembling-shorthand') -----
superSend: aSelector
    "For compatibility with InstructionPrinter output"
    self send: aSelector super: true numArgs: aSelector numArgs!
----- Method: AssemblerMethod>>superSend:above: (in category 'assembling-shorthand') -----
superSend: aSelector above: classOrBinding
    self pushLiteral: (classOrBinding isVariableBinding
    					ifTrue: [classOrBinding]
    					ifFalse: [classOrBinding binding]).
    self directedSuperSend: aSelector numArgs: aSelector numArgs!
----- Method: AssemblerMethod>>trailer (in category 'accessing') -----
trailer
    ^trailer ifNil: [CompiledMethodTrailer empty]!
----- Method: AssemblerMethod>>trailer: (in category 'accessing') -----
trailer: anObject
    "Set the value of trailer"
trailer := anObject!
----- Method: AssemblerMethod>>trailerData (in category 'accessing') -----
trailerData
    ^trailer ifNotNil: [trailer rawData]!
----- Method: AssemblerMethod>>trailerData: (in category 'accessing') -----
trailerData: aByteArray
    self trailer: (CompiledMethodTrailer new method: aByteArray)!
Object subclass: #BytecodeAssembler
    instanceVariableNames: 'code sizes encoder method index shouldNegateInstVarOffsetsMask'
    classVariableNames: ''
    poolDictionaries: ''
    category: 'MethodMassage-Kernel'!
!BytecodeAssembler commentStamp: 'eem 2/22/2013 11:12' prior: 0!
A BytecodeAssembler is something that converts an AssemblerMethod into a CompiledMethod.
Instance Variables
    code:		<AssemblerMethod>
    encoder:	<BytecodeEncoder>
    sizes:		<SequenceableCollection>
code
    - the input assembly method
encoder
    - the encoder that generates instructions
sizes
    - the size of each corresponding bytecode in code's instructions!
----- Method: BytecodeAssembler>>assemble: (in category 'assembly-public') -----
assemble: ass "<AssemblerMethod>"
    code := ass.
    sizes := Array new: code instructions size.
    self createEncoder.
    self nilLabelTargets.
    self sizePasses.
    self createMethod.
    self emitPass.
    ^method!
----- Method: BytecodeAssembler>>code (in category 'accessing') -----
code
    ^code!
----- Method: BytecodeAssembler>>createEncoder (in category 'instance initialization') -----
createEncoder
    "The signFlag defines the bytecode set of a method.
     So create a dummy method with its sign flag to that of
     code's, and instantiate the dummy method's encoderClass."
    | dummyMethod newLits |
    encoder ifNil:
    	[dummyMethod := CompiledMethod
    						newMethod: 0
    						header: (code signFlag ifTrue: [SmallInteger minVal] ifFalse: [0]).
    	 encoder := dummyMethod encoderClass new].
    encoder
    	initClass: code methodClass
    	literalStream: ((newLits := self getLiterals: code literals) isEmpty ifFalse:
    					[self
    						ensureLiteralsIncludeMethodClass: newLits
    						isQuick: (self isQuickPrimitiveIndex: code primitive)]).
    ^encoder!
----- Method: BytecodeAssembler>>createMethod (in category 'assembly') -----
createMethod
    | header size |
    header := encoder
    				computeMethodHeaderForNumArgs: code numArgs
    				numTemps: code numTemps
    				numLits: encoder allLiterals size
    				primitive: code primitive.
    
    code flag ifTrue: "kind of crappy that there's no setter..."
    	[header := header bitOr: (1 << 29)].
    size := sizes size = 0 ifTrue: [0] ifFalse: [self totalSizeFrom: 1 to: sizes size].
    method := code trailer
    				createMethod: size
    				class: code compiledMethodClass
    				header: header.
    method needsFrameSize: code frameSize - method numTemps!
----- Method: BytecodeAssembler>>emitPass (in category 'assembly') -----
emitPass
    | literals nLits emitter |
literals := encoder allLiterals.
    nLits := literals size.
    emitter := BytecodeEmitter assembler: self encoder: encoder.
1 to: nLits do: [:lit | method literalAt: lit put: (literals at: lit)].
encoder streamToMethod: method.
code instructions withIndexDo:
    	[:messageOrLabel :i|
    	(self isLabel: messageOrLabel) ifFalse:
    		[index := i.
    		 messageOrLabel sentTo: emitter]].
"Need to create distinct literals for all literals in the method
     *except* variable bindings and the methodClass literal.."
    1 to: method numLiterals - 2 do:
    	[:litIndex| | lit |
    	lit := method literalAt: litIndex.
    	lit isVariableBinding ifFalse:
    		[method
    			literalAt: litIndex
    			put: (lit isArray ifTrue: [lit deepCopy] ifFalse: [lit copy])]].
"Need to create a distinct additional method state if it has one.
     Avoid setting selector if already set (method penultimateLiteral notNil and not a metod properties)"
    method penultimateLiteral
    	ifNil: [method selector: code selector]
    	ifNotNil:
    		[:plit|
    		plit isMethodProperties ifTrue:
    			[method
    				penultimateLiteral: plit copy;
    				selector: code selector]]
    !
----- Method: BytecodeAssembler>>encoder: (in category 'assembly-public') -----
encoder: aBytecodeEncoder
    encoder := aBytecodeEncoder!
----- Method: BytecodeAssembler>>ensureLiteralsIncludeMethodClass:isQuick: (in category 'private') -----
ensureLiteralsIncludeMethodClass: literals isQuick: isQuick
    "Check whether literals includes the methodClass association (and hence by implication the penultimate literal).
     If not, add a suitable one.  In the assembly case the literal will be missing."
    literals size > 0 ifTrue:
    	[| last |
    	isQuick ifTrue: "support Newspeak accessors"
    		[self assert: literals size = 2.
    		 ^literals].
    	last := literals last.
    	(last isVariableBinding
    	and: [last value = code methodClass
    	and: [last key == nil or: [last == code methodClass binding]]]) ifTrue:
    		[^literals]].
    ^literals, { code selector. code methodClass ifNotNil: [:class| class binding] }!
----- Method: BytecodeAssembler>>getLiterals: (in category 'instance initialization') -----
getLiterals: literals
    | newLits |
    newLits := Array new: literals size.
    literals withIndexDo: [:lit :i |
    	newLits at: i put: (lit class == AssemblerMethod 
    		ifTrue: [lit assemble]
    		ifFalse: [lit])].
    ^ newLits!
----- Method: BytecodeAssembler>>index (in category 'accessing') -----
index
    "For the sizer."
    ^index!
----- Method: BytecodeAssembler>>isLabel: (in category 'testing') -----
isLabel: aMessageOrLookupKey
    ^aMessageOrLookupKey isVariableBinding!
----- Method: BytecodeAssembler>>isQuickPrimitiveIndex: (in category 'testing') -----
isQuickPrimitiveIndex: anInteger
    ^anInteger between: 256 and: 519!
----- Method: BytecodeAssembler>>nilLabelTargets (in category 'assembly') -----
nilLabelTargets
    code instructions do:
    	[:messageOrLabel|
    	(self isLabel: messageOrLabel) ifTrue:
    		[messageOrLabel value: nil]]!
----- Method: BytecodeAssembler>>shouldUseLongAccessForInstVarOffset: (in category 'testing') -----
shouldUseLongAccessForInstVarOffset: offset
    "compute the mask of which inst var offsets need to be negated.
     This is true of inst vars of contexts only."
    shouldNegateInstVarOffsetsMask ifNotNil:
    	[:snivo| ^(snivo bitAnd: (1 bitShift: offset)) ~= 0].
    "The order in which this is done means that if the first offset is +ve all others will be too."
    shouldNegateInstVarOffsetsMask := 0.
    code methodClass instVarNamesAndOffsetsDo:
    	[:n :o|
    	o >= 0 ifTrue:
    		[^(shouldNegateInstVarOffsetsMask bitAnd: (1 bitShift: offset)) ~= 0].
    	o < 0 ifTrue:
    		[shouldNegateInstVarOffsetsMask := shouldNegateInstVarOffsetsMask + (1 bitShift: -1 - o)]].
    ^true!
----- Method: BytecodeAssembler>>sizePasses (in category 'assembly') -----
sizePasses
    | sizer instructions lastForwardJump i limit messageOrLabel |
    sizer := BytecodeSizer assembler: self encoder: encoder.
    "Forward pass that sizes all except forward jumps."
    i := 0.
    limit := (instructions := code instructions) size.
    [(i := i + 1) <= limit] whileTrue:
    	[messageOrLabel := instructions at: i.
    	sizes
    		at: i
    		put: ((self isLabel: messageOrLabel)
    				ifTrue: [0]
    				ifFalse: [index := i.
    						(messageOrLabel sentTo: sizer)
    							ifNil: [lastForwardJump := i. nil]
    							ifNotNil: [:size| size]])].
    lastForwardJump ifNil: [^self].
    "Backward pass that sizes forward jumps."
    i := lastForwardJump + 1.
    [(i := i - 1) >= 1] whileTrue:
    	[(sizes at: i) ifNil:
    		[index := i.
    		 sizes
    			at: i
    			put: ((instructions at: i) sentTo: sizer)]]!
----- Method: BytecodeAssembler>>spanToBlockLabel: (in category 'assembly') -----
spanToBlockLabel: label "<Association>"
    "N.B. Block labels are expected to follow the last bytecode
     in the block and preceed the bytecode following the block."
    | labelIndex |
    labelIndex := label value.
    labelIndex ifNil:
    	[labelIndex := code instructions identityIndexOf: label.
    	 label value: labelIndex].
    self assert: (labelIndex > 1
    			and: [(self isLabel: (code instructions at: labelIndex - 1)) not
    			and: [#(blockReturnTop blockReturnConstant:
    					methodReturnTop methodReturnConstant: methodReturnReceiver)
    						includes: (code instructions at: labelIndex - 1) selector]]).
    ^(sizes at: labelIndex) ifNotNil:
    	[self totalSizeFrom: index + 1 to: labelIndex - 1]!
----- Method: BytecodeAssembler>>spanToLabel: (in category 'assembly') -----
spanToLabel: label "<Association>"
    | labelIndex |
    labelIndex := label value.
    labelIndex ifNil:
    	[labelIndex := code instructions identityIndexOf: label.
    	 label value: labelIndex].
    ^(sizes at: labelIndex) ifNotNil:
    	[self totalSizeFrom: index + 1 to: labelIndex]!
----- Method: BytecodeAssembler>>totalSizeFrom:to: (in category 'assembly') -----
totalSizeFrom: startPC to: targetPC
    | sum |
    sum := 0.
    ^(sizes at: targetPC) ifNotNil:
    	[startPC <= targetPC
    		ifTrue:
    			[startPC to: targetPC do:
    				[:i| sum := sum + (sizes at: i)]]
    		ifFalse:
    			[targetPC to: startPC - 1 do:
    				[:i|
    				"If a nil is found it will be for a forward branch in the first pass, and
    				 the total size will be being requested by a backward branch.  Simply
    				 answer anything negative.  All negative branches are long."
    				(sizes at: i)
    					ifNil: [^-1]
    					ifNotNil: [:size| sum := sum - size]]].
    	 sum]!
Object subclass: #BytecodeCoverer
    instanceVariableNames: ''
    classVariableNames: ''
    poolDictionaries: ''
    category: 'MethodMassage-Coverage'!
----- Method: BytecodeCoverer class>>unusedBytecodeSendsEnabled (in category 'utilities') -----
unusedBytecodeSendsEnabled
    ^(Smalltalk specialObjectsArray at: 58 ifAbsent: []) == #unusedBytecode!
----- Method: BytecodeCoverer>>checkUnusedBytecodeSendsEnabled (in category 'private') -----
checkUnusedBytecodeSendsEnabled
    self class unusedBytecodeSendsEnabled ifFalse:
    	[self error: 'unusedBytecode sends are not enabled.  continuting will likely crash the VM']!
----- Method: BytecodeCoverer>>coverMethod: (in category 'covering') -----
coverMethod: aMethod
    | labels basicBlockStarts unusedBytecode |
    self checkUnusedBytecodeSendsEnabled.
    labels := (BasicBlockLabellingDisassembler new disassemble: aMethod) labels.
    basicBlockStarts := Dictionary new.
    unusedBytecode := aMethod encoderClass unusedBytecode.
    self assert: unusedBytecode notNil.
    labels do:
    	[:assoc| | pc |
    	pc := assoc value.
    	basicBlockStarts at: pc put: (aMethod at: pc).
    	aMethod at: pc put: unusedBytecode].
    aMethod
    	propertyValueAt: #coverage put: basicBlockStarts;
    	voidCogVMState!
----- Method: BytecodeCoverer>>uncoverMethod: (in category 'covering') -----
uncoverMethod: aMethod
    | coverage |
    coverage := aMethod propertyValueAt: #coverage.
    coverage ifNil: [^self].
    coverage keysAndValuesDo:
    	[:pc :bytecode|
    	aMethod at: pc put: bytecode].
    aMethod removeProperty: #coverage.
    (aMethod penultimateLiteral isMethodProperties
     and: [aMethod penultimateLiteral isEmpty]) ifTrue:
    	[aMethod penultimateLiteral: aMethod selector]!
Object subclass: #BytecodeDisassembler
    instanceVariableNames: 'instructions labels labelling instrs thePC method'
    classVariableNames: ''
    poolDictionaries: ''
    category: 'MethodMassage-Kernel'!
BytecodeDisassembler subclass: #BasicBlockLabellingDisassembler
    instanceVariableNames: ''
    classVariableNames: ''
    poolDictionaries: ''
    category: 'MethodMassage-Coverage'!
----- Method: BasicBlockLabellingDisassembler>>jump:if: (in category 'instruction decoding') -----
jump: offset if: condition
    "Override to add a label for the start of the basic block that follows the jump."
    super jump: offset if: condition.
    labelling ifTrue:
    	[labels at: instrs pc put: true]!
----- Method: BasicBlockLabellingDisassembler>>label (in category 'disassembly') -----
label
    "Override to add a label for the first bytecode pc.
     Be careful to skip any initial callPrimitive bytecode."
    method isQuick ifFalse:
    	[| startPC primCode|
    	 startPC := (method primitive ~= 0
    				 and: [(primCode := method encoderClass callPrimitiveCode) notNil])
    					ifTrue: [method initialPC + ((InstructionStream on: method) bytecodeSize: primCode)]
    					ifFalse: [method initialPC].
    	 labels at: startPC put: true].
    super label!
----- Method: BasicBlockLabellingDisassembler>>pushClosureCopyNumCopiedValues:numArgs:blockSize: (in category 'instruction decoding') -----
pushClosureCopyNumCopiedValues: numCopied numArgs: numArgs blockSize: blockSize
    "Override to add a label for the start of a block."
    labelling ifTrue:
    	[labels at: instrs pc put: true].
    super pushClosureCopyNumCopiedValues: numCopied numArgs: numArgs blockSize: blockSize!
----- Method: BytecodeDisassembler>>disassemble: (in category 'disassembly') -----
disassemble: aMethod
    | endPC |
    method := aMethod.
    labels := Array new: aMethod size + 1 withAll: false.
    instructions := Array new: aMethod size + 1.
    instrs := InstructionStream on: aMethod.
    endPC := aMethod endPC.
    labelling := true.
    [(thePC := instrs pc) <= endPC] whileTrue:
    	[instrs interpretNextInstructionFor: self].
    self label.
    labelling := false.
    instrs pc: aMethod initialPC.
    [(thePC := instrs pc) <= endPC] whileTrue:
    	[instrs interpretNextInstructionFor: self].
    ^AssemblerMethod
    	literals: (self disassembleLiterals: aMethod literals)
    	instructions: self instructionSequence
    	numArgs: aMethod numArgs
    	numTemps: aMethod numTemps
    	frameSize: aMethod frameSize
    	primitive: aMethod primitive
    	flag: aMethod flag
    	signFlag: aMethod signFlag
    	trailer: aMethod trailer
    	methodClass: aMethod methodClass
    	selector: aMethod selector
    	compiledMethodClass: aMethod class
    
    "BytecodeDisassembler new disassemble: BytecodeDisassembler >> #jump:if:"!
----- Method: BytecodeDisassembler>>disassembleLiterals: (in category 'disassembly') -----
disassembleLiterals: literals
    literals allButLast withIndexDo: [ :lit :index |
    	lit class == CompiledBlock 
    		ifTrue: [ literals at: index put: (BytecodeDisassembler new disassemble: lit) ] ].
    ^ literals!
----- Method: BytecodeDisassembler>>doesNotUnderstand: (in category 'disassembly') -----
doesNotUnderstand: aMessage
    (BytecodeSizer includesSelector: aMessage selector) ifFalse:
    	[^super doesNotUnderstand: aMessage].
    aMessage lookupClass: nil.
    instructions at: thePC put: aMessage!
----- Method: BytecodeDisassembler>>instructionSequence (in category 'disassembly') -----
instructionSequence
    ^Array streamContents:
    	[:s|
    	labels with: instructions do:
    		[:label :inst|
    		inst ifNotNil:
    			[label ~~ false ifTrue:
    				[s nextPut: label].
    			s nextPut: inst]]]!
----- Method: BytecodeDisassembler>>jump: (in category 'instruction decoding') -----
jump: offset
    "Print the Unconditional Jump bytecode."
labelling
    	ifTrue:
    		[labels at: instrs pc + offset put: true]
    	ifFalse:
    		[instructions
    			at: thePC
    			put: (Message
    					selector: #jump:
    					argument: (labels at: instrs pc + offset))]!
----- Method: BytecodeDisassembler>>jump:if: (in category 'instruction decoding') -----
jump: offset if: condition
    "Disassemble the Conditional Jump bytecode."
labelling
    	ifTrue:
    		[labels at: instrs pc + offset put: true]
    	ifFalse:
    		[instructions
    			at: thePC
    			put: (Message
    					selector: #jump:if:
    					arguments: { labels at: instrs pc + offset. condition })]!
----- Method: BytecodeDisassembler>>label (in category 'disassembly') -----
label
    "N.B. A Label is an Association so that later its pc can be sorted in its value field."
    | n |
    n := 0.
    labels doWithIndex:
    	[:l :i|
    	l ifTrue:
    		[labels at: i put: (Association new key: 'L', (n := n + 1) printString value: i)]]!
----- Method: BytecodeDisassembler>>popIntoLiteralVariable: (in category 'instruction decoding') -----
popIntoLiteralVariable: aLiteral
    | litIndex |
    litIndex := method encoderClass literalIndexOfBytecodeAt: thePC in: method.
    litIndex ifNil: [self error: 'could not decode literal index'].
    instructions
    	at: thePC
    	put: (Message
    			selector: #popIntoLiteralVariableAtIndex:
    			argument: litIndex)!
----- Method: BytecodeDisassembler>>pushClosureCopyNumCopiedValues:numArgs:blockSize: (in category 'instruction decoding') -----
pushClosureCopyNumCopiedValues: numCopied numArgs: numArgs blockSize: blockSize
    labelling
    	ifTrue:
    		[labels at: instrs pc + blockSize put: true]
    	ifFalse:
    		[instructions
    			at: thePC
    			put: (Message
    					selector: #pushClosureCopyNumCopiedValues:numArgs:blockSize:
    					arguments: { numCopied. numArgs. labels at: instrs pc + blockSize })]!
----- Method: BytecodeDisassembler>>pushConstant: (in category 'instruction decoding') -----
pushConstant: aLiteral
    instructions
    	at: thePC
    	put: ((method encoderClass literalIndexOfBytecodeAt: thePC in: method)
    			ifNil: [Message
    					selector: #pushSpecialConstant:
    					argument: aLiteral]
    			ifNotNil:
    				[:index|
    				Message
    					selector: #pushConstantAtIndex:
    					argument: index])!
----- Method: BytecodeDisassembler>>pushFullClosure:numCopied:receiverOnStack:ignoreOuterContext: (in category 'instruction decoding') -----
pushFullClosure: compiledBlock numCopied: numCopied receiverOnStack: rcvrOnStack ignoreOuterContext: ignoreOuterContext
    | litIndex |
    litIndex := method literals indexOf: compiledBlock.
    litIndex ifNil: [ self error: 'cannot encode the method' ].
.	instructions 
    	at: thePC 
    	put: (Message
    					selector: #pushFullClosureAtIndex:numCopied:receiverOnStack:ignoreOuterContext:
    					arguments: { litIndex . numCopied. rcvrOnStack . ignoreOuterContext })!
----- Method: BytecodeDisassembler>>pushLiteralVariable: (in category 'instruction decoding') -----
pushLiteralVariable: aLiteral
    | litIndex |
    litIndex := method encoderClass literalIndexOfBytecodeAt: thePC in: method.
    litIndex ifNil: [self error: 'could not decode literal index'].
    instructions
    	at: thePC
    	put: (Message
    			selector: #pushLiteralVariableAtIndex:
    			argument: litIndex)!
----- Method: BytecodeDisassembler>>storeIntoLiteralVariable: (in category 'instruction decoding') -----
storeIntoLiteralVariable: aLiteral
    | litIndex |
    litIndex := method encoderClass literalIndexOfBytecodeAt: thePC in: method.
    litIndex ifNil: [self error: 'could not decode literal index'].
    instructions
    	at: thePC
    	put: (Message
    			selector: #storeIntoLiteralVariableAtIndex:
    			argument: litIndex)!
----- Method: CompiledMethod>>assemblerString (in category '*MethodMassage-disassembly') -----
assemblerString
    ^self disassemble assemblerString!
----- Method: CompiledMethod>>disassemble (in category '*MethodMassage-disassembly') -----
disassemble
    ^BytecodeDisassembler new disassemble: self!
----- Method: CompiledMethod>>indexOfDifferenceWith: (in category '*MethodMassage-debugging') -----
indexOfDifferenceWith: method
    "Answer whether the receiver implements the same code as the argument, method.
     Here ``same code'' means that if the receiver's source is compiled with the same
     compiler it should produce the same sequence of bytecodes and literals, same
     trailer and same properties.  Hence this definition of #= (only one of many plausible
     definitions) can be used to quickly identify changes in the compiler's output."
    | numLits |
    method isCompiledMethod ifFalse: [^1].
    self size = method size ifFalse: [^-2].
    self header = method header ifFalse: [^-3]. "N.B. includes numLiterals comparison."
    self initialPC to: self endPC do:
    	[:i | (self at: i) = (method at: i) ifFalse: [^i]].
    numLits := self numLiterals.
    1 to: numLits do:
    	[:i| | lit1 lit2 |
    	lit1 := self literalAt: i.
    	lit2 := method literalAt: i.
    	(lit1 == lit2 or: [lit1 literalEqual: lit2]) ifFalse:
    		[(i = 1 and: [#(117 120) includes: self primitive])
    			ifTrue:
    				[lit1 isArray
    					ifTrue:
    						[(lit2 isArray and: [lit1 allButLast = lit2 allButLast]) ifFalse:
    							[^i]]
    					ifFalse: "ExternalLibraryFunction"
    						[(lit1 analogousCodeTo: lit2) ifFalse:
    							[^i]]]
    			ifFalse:
    				[i = (numLits - 1)
    					ifTrue: "properties"
    						[(self properties analogousCodeTo: method properties)
    							ifFalse: [^i]]
    					ifFalse: "last literal (methodClassAssociation) of class-side methods is not unique"
    						[(i = numLits
    						 and: [lit1 isVariableBinding
    						 and: [lit2 isVariableBinding
    						 and: [lit1 key == lit2 key
    						 and: [lit1 value == lit2 value]]]]) ifFalse:
    							[^i]]]]].
    ^0!
----- Method: MethodContext>>unusedBytecode (in category '*MethodMassage-coverage') -----
unusedBytecode
    "Handle unusedBytecode by replacing the bytecode with the
     correct one found in the coverage property and continuing.
     Continue via wait/signal since return would push a result."
    | coverage semaphore process originalBytecode |
    self assert: (method at: pc) = method encoderClass unusedBytecode.
    coverage := method propertyValueAt: #coverage.
    self assert: coverage notNil.
    originalBytecode := coverage at: pc ifAbsent: [nil].
    self assert: originalBytecode notNil.
    semaphore := Semaphore new.
    process := Processor activeProcess.
[method at: pc put: originalBytecode.
     coverage removeKey: pc ifAbsent: [].
     process suspendedContext unwindTo: self.
     process suspendedContext: self.
     semaphore signal] fork.
semaphore wait!
----- Method: BytecodeEncoder class>>assembler (in category '*MethodMassage-assembly') -----
assembler
    "Answer an assembler for a method that uses the receiver's instruction set."
    ^AssemblerMethod new
    	encoder: self new;
    	yourself!
----- Method: BytecodeEncoder>>litIndexOrNilFor: (in category '*MethodMassage-literal access') -----
litIndexOrNilFor: aLiteral
    | index |
    index := aLiteral isVariableBinding
    			ifTrue: [literalStream originalContents identityIndexOf: aLiteral ifAbsent: [^nil]]
    			ifFalse: [literalStream originalContents indexOf: aLiteral ifAbsent: [^nil]].
    ^index <= literalStream position ifTrue:
    	[index - 1]!
----- Method: CompiledMethodTrailer>>rawData (in category '*MethodMassage-raw data') -----
rawData
    ^(ByteArray new: size)
    	replaceFrom: 1
    	to: size
    	with: method
    	startingAt: method size - size + 1!
----- Method: Encoder>>initClass:literalStream: (in category '*MethodMassage-instance initialization') -----
initClass: targetBehavior literalStream: literalsOrNil
    cue := CompilationCue class: targetBehavior.
    class := targetBehavior.
    optimizedSelectors := Set new.
    literalsOrNil
    	ifNil:
    		[literalStream := WriteStream on: (Array new: 32).
    		 addedSelectorAndMethodClassLiterals := false]
    	ifNotNil:
    		[literalStream := (WriteStream on: literalsOrNil asArray from: 1 to: literalsOrNil size) setToEnd.
    		 addedSelectorAndMethodClassLiterals := true]!
----- Method: EncoderForV3 class>>literalIndexOfBytecodeAt:in: (in category '*MethodMassage-disassembly') -----
literalIndexOfBytecodeAt: pc in: aCompiledMethod
    "32-63 		001iiiii 						Push Literal Constant #iiiii
     64-95 		010iiiii 						Push Literal Variable #iiiii
     128 		10000000 jjkkkkkk 		Push (Receiver Variable, Temporary Location, Literal Constant, Literal Variable) [jj] #kkkkkk
    129 		10000001 jjkkkkkk 		Store (Receiver Variable, Temporary Location, Illegal, Literal Variable) [jj] #kkkkkk
    130 		10000010 jjkkkkkk 		Pop and Store (Receiver Variable, Temporary Location, Illegal, Literal Variable) [jj] #kkkkkk
    132 		10000100 iiijjjjj kkkkkkkk 	(Send, Send Super, Push Receiver Variable, Push Literal Constant, Push Literal Variable, Store Receiver Variable, Store-Pop Receiver Variable, Store Literal Variable)[iii] #kkkkkkkk jjjjj (for sends jjjjj = numArgs)"
    | byte type |
    byte := aCompiledMethod at: pc.
    byte <= 95 ifTrue:
    	[^byte >= 32 ifTrue:
    		[byte bitAnd: 16r1F]].
    (byte between: 128 and: 130) ifTrue:
    	[^(aCompiledMethod at: pc + 1) bitAnd: 16r3F].
    byte = 132 ifTrue:
    [type := (aCompiledMethod at: pc + 1) bitShift: -5.
     (type = 3 or: [type = 4 or: [type = 7]]) ifTrue:
    	[^aCompiledMethod at: pc + 2]].
    ^nil!
TestCase subclass: #BytecodeAssemblerTests
    instanceVariableNames: ''
    classVariableNames: ''
    poolDictionaries: ''
    category: 'MethodMassage-Tests'!
----- Method: BytecodeAssemblerTests class>>fixupMethodClassBindings (in category 'utilities') -----
fixupMethodClassBindings
    "Work-around the Monticello bug that results in not sharing the binding in Smalltalk as a method's methodClassAssociation."
    "self fixupMethodClassBindings"
    self systemNavigation allSelect:
    	[:m|
    	(m methodClass isMeta not
    	 and: [m methodClassAssociation key isNil]) ifTrue:
    		[m methodClassAssociation: m methodClass binding].
    	false]!
----- Method: BytecodeAssemblerTests>>contextPartMethodWithMostOf: (in category 'test support') -----
contextPartMethodWithMostOf: binaryBlock
    ^(Array streamContents: [:s| ContextPart withAllSubclassesDo: [:sc| s nextPutAll: sc methodDict values]])
    	inject: ContextPart methodDict anyOne
    	into:
    		[:m1 :m2|
    		((1 to: m1 methodClass instSize) select: [:i| binaryBlock value: m1 value: i]) size >=
    		((1 to: m2 methodClass instSize) select: [:i| binaryBlock value: m2 value: i]) size
    			ifTrue: [m1]
    			ifFalse: [m2]]!
----- Method: BytecodeAssemblerTests>>defaultTimeout (in category 'accessing') -----
defaultTimeout
    "Answer the default timeout to use for tests in this test case.
    The timeout is a value in seconds."
^30 "seconds"!
----- Method: BytecodeAssemblerTests>>expectedFailures (in category 'testing') -----
expectedFailures
    ((thisContext method respondsTo: #usesAlternateBytecodeSet)
     or: [thisContext method respondsTo: #bytecodeSetName]) ifTrue:
    	[^#()].
    ^#(testDuplicateNewsqueakV4Methods)!
----- Method: BytecodeAssemblerTests>>testAsAssemblerFor: (in category 'test support') -----
testAsAssemblerFor: aMethod
    "self new testAsAssemblerFor: self >> #testAsAssemblerFor:"
    | assemblerMethod assembler reassembledMethod |
    assemblerMethod := BytecodeDisassembler new disassemble: aMethod.
    assembler := String streamContents: [:s| assemblerMethod printAsAssemblerOn: s].
    self shouldnt: [reassembledMethod := Compiler evaluate: assembler]
    	raise: Error.
    self assert: assemblerMethod compiledMethodClass equals: reassembledMethod compiledMethodClass.
    self assert: assemblerMethod flag equals: reassembledMethod flag.
    self assert: assemblerMethod frameSize equals: reassembledMethod frameSize.
    self assert: assemblerMethod methodClass equals: reassembledMethod methodClass.
    self assert: assemblerMethod numArgs equals: reassembledMethod numArgs.
    self assert: assemblerMethod numTemps equals: reassembledMethod numTemps.
    self assert: assemblerMethod primitive equals: reassembledMethod primitive.
    self assert: assemblerMethod selector equals: reassembledMethod selector.
    self assert: assemblerMethod signFlag equals: reassembledMethod signFlag.
    1 to: reassembledMethod literals size do:
    	[:i|
    	self assert: (assemblerMethod literals at: i)
    		equals: (reassembledMethod literals at: i)].
    assemblerMethod instructions
    	ifNil: [self assert: reassembledMethod instructions isNil]
    	ifNotNil:
    		[:insts|
    		 self assert: insts size equals: reassembledMethod instructions size.
    		 "Nil the labels' values for analogousCodeTo: comparison below; the values
    		  are usefully the bytecode pcs of the labels, but this fails the comparisons."
    		 insts do: [:inst| inst isVariableBinding ifTrue: [inst value: nil]].
    		 insts
    			with: reassembledMethod instructions
    			do: [:old :new|
    				old isVariableBinding
    					ifTrue: [self assert: old key = new key]
    					ifFalse: [self assert: (old analogousCodeTo: new)]]].
    self assert: aMethod equals: (BytecodeAssembler new assemble: reassembledMethod)!
----- Method: BytecodeAssemblerTests>>testAsAssemblerForThisPackage (in category 'tests') -----
testAsAssemblerForThisPackage
    (PackageOrganizer default packageOfClass: self class) actualMethodsDo:
    	[:m| self testAsAssemblerFor: m]!
----- Method: BytecodeAssemblerTests>>testBasicBlockLabelsFor: (in category 'test support') -----
testBasicBlockLabelsFor: aMethod
    "self new testBasicBlockLabelsFor: self >> #testBasicBlockLabelsFor:"
    | labels stream endPC nextPC |
    labels := (BasicBlockLabellingDisassembler new disassemble: aMethod) labels.
    aMethod isQuick ifTrue:
    	[^self assert: labels isEmpty].
    self assert: (labels select: [:l| aMethod initialPC = l value]) size = 1.
    aMethod embeddedBlockClosures do:
    	[:closure|
    	self assert: (labels select: [:l| closure startpc = l value]) size = 1].
    stream := InstructionStream on: aMethod.
    endPC := aMethod endPC.
    [stream pc <= endPC] whileTrue:
    	[nextPC := stream nextPc: (aMethod at: stream pc).
    	 (stream willJumpIfTrue or: [stream willJumpIfFalse]) ifTrue:
    		["A conditional jump should have a label following it."
    		 self assert: (labels select: [:l| stream followingPc = l value]) size = 1].
    	 stream interpretJump ifNotNil:
    		[:dist| "There shoud be a label at the target, and, if it is conditional, also one following the jump."
    		self assert: (labels select: [:l| stream pc + dist = l value]) size = 1].
    	 stream pc: nextPC]!
----- Method: BytecodeAssemblerTests>>testBasicBlockLabelsForThisPackage (in category 'tests') -----
testBasicBlockLabelsForThisPackage
    (PackageOrganizer default packageOfClass: self class) actualMethodsDo:
    	[:m| self testBasicBlockLabelsFor: m]!
----- Method: BytecodeAssemblerTests>>testDisassembleBytecodeAssemblerMethods (in category 'tests') -----
testDisassembleBytecodeAssemblerMethods
    self testDisassembleMethodsFor: BytecodeAssembler!
----- Method: BytecodeAssemblerTests>>testDisassembleMethodsFor: (in category 'test support') -----
testDisassembleMethodsFor: aBehavior
    aBehavior selectors asArray sort do:
    	[:sel| | method |
    	method := aBehavior compiledMethodAt: sel.
    	self shouldnt: [BytecodeDisassembler new disassemble: method]
    		raise: Error]!
----- Method: BytecodeAssemblerTests>>testDuplicateAllInstructionStreamMethods (in category 'tests') -----
testDuplicateAllInstructionStreamMethods
    InstructionStream withAllSuperclasses, InstructionStream allSubclasses do:
    	[:isc|
    	self testDuplicateMethodsFor: isc
    		if: [:method| true]]!
----- Method: BytecodeAssemblerTests>>testDuplicateBytecodeAssemblerMethods (in category 'tests') -----
testDuplicateBytecodeAssemblerMethods
    self testDuplicateMethodsFor: BytecodeAssembler
    	if: [:method| true]!
----- Method: BytecodeAssemblerTests>>testDuplicateMethodsFor:if: (in category 'test support') -----
testDuplicateMethodsFor: aBehavior if: methodSelectBlock
    aBehavior selectors asArray sort do:
    	[:sel| | method disassembly assembly |
    	method := aBehavior compiledMethodAt: sel.
    	(methodSelectBlock value: method) ifTrue:
    		[disassembly := BytecodeDisassembler new disassemble: method.
    		 assembly := BytecodeAssembler new assemble: disassembly.
    		"method indexOfDifferenceWith: assembly"
    		 self assert: method equals: assembly]]!
----- Method: BytecodeAssemblerTests>>testDuplicateNewsqueakV4Methods (in category 'tests') -----
testDuplicateNewsqueakV4Methods
    Smalltalk allClasses do:
    	((thisContext method respondsTo: #usesAlternateBytecodeSet)
    		ifTrue:
    			[[:class|
    			  self testDuplicateMethodsFor: class
    				if: [:method| method usesAlternateBytecodeSet].
    			  self testDuplicateMethodsFor: class class
    				if: [:method| method usesAlternateBytecodeSet]]]
    		ifFalse:
    			[[:class|
    			  self testDuplicateMethodsFor: class
    				if: [:method| method bytecodeSetName = 'NewsqueakV4'].
    			  self testDuplicateMethodsFor: class class
    				if: [:method| method bytecodeSetName = 'NewsqueakV4']]])!
----- Method: BytecodeAssemblerTests>>testDuplicateSqueakV3Methods (in category 'tests') -----
testDuplicateSqueakV3Methods
    "AndreasProfiler spyOn: [self new testDuplicateSqueakV3Methods]"
    | filter |
    filter := (thisContext method respondsTo: #usesAlternateBytecodeSet)
    			ifTrue: [[:method| method usesAlternateBytecodeSet not]]
    			ifFalse: [[:method| true]].
    Smalltalk allClasses do:
    	[:class|
    	self testDuplicateMethodsFor: class if: filter.
    	self testDuplicateMethodsFor: class class if: filter]!
----- Method: BytecodeAssemblerTests>>testLabelsFor: (in category 'test support') -----
testLabelsFor: aMethod
    "self new testLabelsFor: self >> #testLabelsFor:"
    | labels stream endPC |
    labels := (BytecodeDisassembler new disassemble: aMethod) labels.
    stream := InstructionStream on: aMethod.
    endPC := aMethod endPC.
    [stream pc <= endPC] whileTrue:
    	[stream interpretJump
    		ifNotNil: [:dist| self assert: (labels select: [:l| stream pc + dist = l value]) size = 1]
    		ifNil: [stream pc: (stream nextPc: (aMethod at: stream pc))]]!
----- Method: BytecodeAssemblerTests>>testLabelsForThisPackage (in category 'tests') -----
testLabelsForThisPackage
    (PackageOrganizer default packageOfClass: self class) actualMethodsDo:
    	[:m| self testLabelsFor: m]!
----- Method: BytecodeAssemblerTests>>testManualAssembly (in category 'tests') -----
testManualAssembly
    self
    	assert:
    		(AssemblerMethod new
    			methodClass: Object; selector: #printOn:; numArgs: 1; numTemps: 2;
    			pushReceiver;
    			send: #class;
    			send: #name;
    			popIntoTemporaryVariable: 1;
    			pushTemporaryVariable: 0;
    			doDup;
    			pushTemporaryVariable: 1;
    			send: #first;
    			send: #isVowel;
    			jump: 'L1' if: false;
    			pushConstant: 'an ';
    			jump: 'L2';
    		label: 'L1';
    			pushConstant: 'a ';
    		label: 'L2';
    			send: #nextPutAll:;
    			doPop;
    			pushTemporaryVariable: 1;
    			send: #nextPutAll:;
    			doPop;
    			methodReturnReceiver;
    			assemble) decompile printString
    	equals: (Object >>#printOn:) decompile printString!
TestCase subclass: #BytecodeCoverageTests
    instanceVariableNames: ''
    classVariableNames: ''
    poolDictionaries: ''
    category: 'MethodMassage-Tests'!
----- Method: BytecodeCoverageTests>>coverTestBasicBlockLabelsForMethod (in category 'tests support') -----
coverTestBasicBlockLabelsForMethod
(PackageOrganizer default packageOfClass: self class) actualMethodsDo:
    	[:m| self testBasicBlockLabelsFor: m]!
----- Method: BytecodeCoverageTests>>setUp (in category 'initialize-release') -----
setUp
    self class recompile: #testBasicBlockLabelsFor: from: BytecodeAssemblerTests!
----- Method: BytecodeCoverageTests>>tearDown (in category 'initialize-release') -----
tearDown
    self class removeSelectorSilently: #testBasicBlockLabelsFor:!
----- Method: BytecodeCoverageTests>>testCoverageOfTestBasicBlockLabelsForMethod (in category 'tests') -----
testCoverageOfTestBasicBlockLabelsForMethod
    "[| me |
    me := self new.
    [me setUp; testCoverageOfTestBasicBlockLabelsForMethod]
    	ensure: [me tearDown]] timeToRun"
    "[| me |
    me := self new.
    [me setUp; coverTestBasicBlockLabelsForMethod]
    	ensure: [me tearDown]] timeToRun"
    | theMethod |
    theMethod := self class >> #testBasicBlockLabelsFor:.
    BytecodeCoverer new coverMethod: theMethod.
    self assert: (theMethod propertyValueAt: #coverage) notNil.
    self assert: (theMethod propertyValueAt: #coverage) notEmpty.
self coverTestBasicBlockLabelsForMethod.
self assert: (theMethod propertyValueAt: #coverage) isEmpty!

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