compiler/TScope.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Wed, 23 Sep 2015 22:21:44 +0100
changeset 15 10a95d798b36
parent 13 97090c2baa33
child 16 17a2d1d9f205
permissions -rw-r--r--
Added support for local variables and #whileTrue: special form Allocate all local variables in a special basic block named `allocas`. Added support for #whileTrue: special form.
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"{ Package: 'jv:tea/compiler' }"
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"{ NameSpace: Smalltalk }"
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TObjectWithProperties subclass:#TScope
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	instanceVariableNames:'node parent children variables'
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	classVariableNames:''
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	poolDictionaries:''
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	category:'Languages-Tea-Compiler-Bindings'
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!
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!TScope class methodsFor:'instance creation'!
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node: node
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    ^ self node: node parent: nil.
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    "Created: / 25-08-2015 / 22:28:56 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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node: node parent: parent
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    ^ self new initializeWithNode: node parent: parent
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    "Created: / 25-08-2015 / 22:24:20 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!TScope methodsFor:'accessing'!
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children
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    ^ children ? #()
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    "Modified: / 25-08-2015 / 22:28:21 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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node
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    ^ node
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!
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parent
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    ^ parent
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!
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variables
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    ^ variables ? #()
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    "Modified: / 19-09-2015 / 05:56:30 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!TScope methodsFor:'accesssing - llvm'!
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llvmAllocas
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    ^ self propertyAt: #llvmAllocas 
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            ifAbsent: [ parent notNil ifTrue:[ parent llvmAllocas ] ifFalse:[nil] ]
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    "Created: / 23-09-2015 / 21:42:52 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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llvmAllocas: anLLVMBasicBlock
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    self propertyAt: #llvmAllocas put: anLLVMBasicBlock
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    "Created: / 23-09-2015 / 21:40:57 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!TScope methodsFor:'adding & removing'!
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addSubScope: aTScope
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    children isNil ifTrue:[ 
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        children := OrderedCollection new: 5.
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    ].
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    children add: aTScope
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    "Created: / 19-09-2015 / 06:05:50 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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addVariable: aTVariableBinding
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    variables isNil ifTrue:[ 
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        variables := OrderedCollection new.
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    ].
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    variables add: aTVariableBinding
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    "Created: / 25-08-2015 / 22:42:29 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!TScope methodsFor:'initialization'!
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initializeWithNode: n parent: p
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    node := n.
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    parent := p.
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    parent notNil ifTrue:[ 
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        parent addSubScope: self.  
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    ].
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    "Created: / 25-08-2015 / 22:25:12 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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    "Modified: / 19-09-2015 / 06:06:27 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!TScope methodsFor:'lookup'!
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lookupVariable: name
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    "Return binding for variable with given name or nil if not found"
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    | variable |
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    variables notNil ifTrue:[ 
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        variable := variables detect:[:binding |  binding name = name ] ifNone:[ nil ].
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    ].
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    (variable isNil and:[parent notNil]) ifTrue:[
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        variable := parent lookupVariable: name.  
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    ].
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    ^ variable
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    "Created: / 25-08-2015 / 22:58:18 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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    "Modified: / 20-09-2015 / 06:11:23 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!TScope methodsFor:'testing'!
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hasSelfArgument
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    ^ (node isMethod and:[node binding mclass isMetaclass not])
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    "Created: / 23-09-2015 / 18:48:30 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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isBlockScope
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    ^ node isBlock
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    "Created: / 02-09-2015 / 08:57:45 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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isMethodScope
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    ^ node isMethod
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    "Created: / 02-09-2015 / 08:58:00 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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