Merged in PetitCompiler-JanVrany.170, PetitCompiler-Tests-JanKurs.116, PetitCompiler-Extras-Tests-JanKurs.29, PetitCompiler-Benchmarks-JanKurs.19
Name: PetitCompiler-JanVrany.170
Author: JanVrany
Time: 24-08-2015, 03:19:51.340 PM
UUID: c20a744f-3b41-4aaa-bb8a-71ce74a2a952
Name: PetitCompiler-Tests-JanKurs.116
Author: JanKurs
Time: 24-08-2015, 11:37:54.332 AM
UUID: 549e0927-358a-4a1b-8270-050ccfcb4217
Name: PetitCompiler-Extras-Tests-JanKurs.29
Author: JanKurs
Time: 24-08-2015, 11:36:52.503 AM
UUID: ea1dbb67-f884-4237-8f34-adb0677c0954
Name: PetitCompiler-Benchmarks-JanKurs.19
Author: JanKurs
Time: 24-08-2015, 11:48:47.045 AM
UUID: 1c342fdb-8ddd-4104-9c47-a8f589c51694
"{ Package: 'stx:goodies/petitparser/compiler' }"
"{ NameSpace: Smalltalk }"
PPCRewritingVisitor subclass:#PPCMergingVisitor
instanceVariableNames:'nodeSet'
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-Visitors'
!
!PPCMergingVisitor methodsFor:'as yet unclassified'!
equivalentNode: node
^ nodeSet detect: [ :e | e = node ]
!
hasEquivalentNode: node
^ nodeSet includes: node
!
initialize
super initialize.
nodeSet := Set new
!
store: node
self assert: (self hasEquivalentNode: node) not.
nodeSet add: node
!
visitNode: node
super visitNode: node.
(self hasEquivalentNode: node) ifTrue: [
self change.
^ self equivalentNode: node
] ifFalse: [
self store: node
].
^ node
! !