Codegen refactoring [1/x]: Introduced a PPCCodeBlock
A PPCCodeBlock is an abstraction of a block of statements with temporaries. This will
allow for scoped temporary management in code generator - temporary variables could
be allocated for block only. (i.e., make them block-temporaries)
"{ Package: 'stx:goodies/petitparser/compiler' }"
"{ NameSpace: Smalltalk }"
Object subclass:#PPCConfiguration
instanceVariableNames:'arguments ir history'
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-Core'
!
!PPCConfiguration class methodsFor:'as yet unclassified'!
default
^ self universal
!
new
^ self basicNew
initialize;
yourself
!
tokenizing
^ PPCTokenizingConfiguration new
!
universal
^ PPCUniversalConfiguration new
! !
!PPCConfiguration methodsFor:'accessing'!
arguments
arguments isNil ifTrue: [ arguments := self defaultArguments ].
^ arguments
!
arguments: args
arguments := args
!
defaultArguments
^ PPCArguments default
!
input: whatever
ir := whatever.
self remember: #input.
!
ir
^ ir
!
ir: whatever
ir := whatever
! !
!PPCConfiguration methodsFor:'caching'!
cacheFirstSet
"Creates a PPCNodes from a PPParser"
| firstSets |
firstSets := ir firstSets.
ir allNodesDo: [ :node |
node firstSet: (firstSets at: node)
]
!
cacheFirstSetWithProductions
"Creates a PPCNodes from a PPParser"
| firstSets |
firstSets := ir firstSetsSuchThat: [:e | e name isNil not ].
ir allNodesDo: [ :node |
node firstSetWithProductions: (firstSets at: node)
]
!
cacheFirstSetWithTokens
"Creates a PPCNodes from a PPParser"
| firstSets |
firstSets := ir firstSetsSuchThat: [:e | e isTerminal or: [ e isTokenNode ] ].
ir allNodesDo: [ :node |
node firstSetWithTokens: (firstSets at: node)
]
!
cacheFollowSet
"Creates a PPCNodes from a PPParser"
| followSets |
followSets := ir followSets.
ir allNodesDo: [ :node |
node followSet: (followSets at: node)
]
!
cacheFollowSetWithTokens
"Creates a PPCNodes from a PPParser"
| followSets |
followSets := ir firstSetsSuchThat: [:e | e isTerminal or: [ e isTokenNode ] ].
ir allNodesDo: [ :node |
node followSetWithTokens: (followSets at: node)
]
! !
!PPCConfiguration methodsFor:'compiling'!
compile: whatever
self input: whatever.
self invokePhases.
^ ir
!
invokePhases
self subclassResponsibility
! !
!PPCConfiguration methodsFor:'debugging'!
copy: somethingTransformable
^ somethingTransformable transform: [ :e | e copy ]
!
remember: key
self arguments debug ifTrue: [
history add: key -> (self copy: ir).
]
! !
!PPCConfiguration methodsFor:'hooks'!
codeCompilerOn: args
^ PPCCompiler on: args
!
codeGeneratorVisitorOn: compiler
^ arguments codeGenerator on: compiler
! !
!PPCConfiguration methodsFor:'initialization'!
initialize
history := OrderedCollection new
! !
!PPCConfiguration methodsFor:'phases'!
cacheFirstFollow
arguments cacheFirstFollow ifFalse: [ ^ self ] .
self cacheFirstSet.
self cacheFollowSet.
self cacheFirstSetWithTokens.
self cacheFollowSetWithTokens.
!
check
ir checkTree
!
createRecognizingComponents
arguments recognizingComponents ifFalse: [ ^ self ] .
ir := PPCRecognizerComponentDetector new
arguments: arguments;
visit: ir.
self remember: #recognizingComponents
!
createTokens
arguments detectTokens ifFalse: [ ^ self ] .
ir := PPCTokenDetector new
arguments: arguments;
visit: ir.
self remember: #createTokens
!
generate
| compiler rootMethod compiledParser |
arguments generate ifFalse: [ ^ self ].
compiler := self codeCompilerOn: arguments.
rootMethod := (self codeGeneratorVisitorOn: compiler)
arguments: arguments;
visit: ir.
compiler compileParser.
compiler compiledParser startSymbol: rootMethod methodName.
compiledParser := compiler compiledParser new.
ir := compiledParser.
!
inline
arguments inline ifFalse: [ ^ self ].
ir := PPCInliningVisitor new
arguments: arguments;
visit: ir.
self remember: #inline.
!
merge
"Merge equivalent nodes under one object with single identity"
arguments merge ifFalse: [ ^ self ].
ir := PPCMergingVisitor new
arguments: arguments;
visit: ir.
self remember: #merge
!
specialize
arguments specialize ifFalse: [ ^ self ].
"
Invokes a visitor that creates specialized nodes
for some patterns of PPCNodes,
e.g. $a astar can be represented by PPCCharacterStarNode
"
ir := (PPCSpecializingVisitor new
arguments: arguments;
visit: ir).
self remember: #specialize
!
toPPCIr
"Creates a PPCNodes from a PPParser"
ir := ir asCompilerTree.
self remember: #ppcNodes
! !