98 lines
2.6 KiB
Smalltalk
98 lines
2.6 KiB
Smalltalk
"
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I am CodeGen suited for the needs of standard (universal) code generator.
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"
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Class {
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#name : 'PPCUniversalCodeGen',
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#superclass : 'PPCCodeGen',
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#category : 'PetitCompiler-Compiler-Codegen'
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}
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{ #category : 'memoization' }
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PPCUniversalCodeGen >> remember: node to: variableName [
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self memoizationStrategy remember: node to: variableName.
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"options analyzeContext ifFalse: [
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self codeAssign: 'context remember.'
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to: variableName.
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^ self
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].
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(node changesContext) ifFalse: [
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self codeAssign: 'context lwRemember.'
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to: variableName.
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] ifTrue: [
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node isIndentPush ifTrue: [
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self codeAssign: 'context lwRemember.'
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to: variableName.
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] ifFalse: [
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(node isSequenceNode and: [node children allButLast noneSatisfy: [:e | e changesContext ]]) ifTrue: [
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""it is only the last child that changes context...""
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self codeAssign: 'context lwRemember.'
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to: variableName.
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] ifFalse: [
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self codeAssign: 'context remember.'
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to: variableName.
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].
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]
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]
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"
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]
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{ #category : 'memoization' }
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PPCUniversalCodeGen >> restore: node from: variableName [
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^ self memoizationStrategy restore: node from: variableName.
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" self flag: 'JK: refactor!'.
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options analyzeContext ifFalse: [
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self code: 'context restore: ', mementoName, '.'.
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^ self
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].
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node changesContext ifFalse: [
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self code: 'context lwRestore: ', mementoName, '.'.
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] ifTrue: [
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node isIndentPush ifTrue: [
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self assert: node isSequenceNode not.
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self code: 'context lwRestore: ', mementoName, '.'.
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self code: 'context indentStack pop.'.
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] ifFalse: [
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self code: 'context restore: ', mementoName, '.'.
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]
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]
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"
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]
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{ #category : 'memoization' }
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PPCUniversalCodeGen >> restoreSequence: node child: child from: variableName [
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self assert: node isSequenceNode.
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self memoizationStrategy restoreSequenceNode: node child: child from: variableName
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"
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self flag: 'JK: refactor'.
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options analyzeContext ifFalse: [
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self code: 'context restore: ', mementoName, '.'.
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^ self
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].
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node changesContext ifFalse: [
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self restore: node from: mementoName
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] ifTrue: [
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node isIndentPush ifTrue: [
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| push |
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self code: 'context lwRestore: ', mementoName, '.'.
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push := (node children detect: [:e | e isIndentPush]).
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(node children indexOf: child) > (node children indexOf: push) ifTrue: [
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self code: 'context indentStack pop.'.
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]
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] ifFalse: [
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(node children allButLast noneSatisfy: [:e | e changesContext ]) ifTrue: [
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""it is only the last child that changes context...""
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self code: 'context lwRestore: ', mementoName, '.'.
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] ifFalse: [
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self restore: node from: mementoName
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]
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]
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]
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"
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]
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