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CCodeGenerator.class.st
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CCodeGenerator.class.st
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"
This class oversees the translation of a subset of Smalltalk to C, allowing the comforts of Smalltalk during development and the efficiency and portability of C for the resulting interpreter.
See VMMaker for more useful info
# toto
"
Class {
#name : #CCodeGenerator,
#superclass : #Object,
#instVars : [
'structClasses',
'translationDict',
'asArgumentTranslationDict',
'inlineList',
'constants',
'variables',
'variableDeclarations',
'scopeStack',
'methods',
'macros',
'apiMethods',
'apiVariables',
'kernelReturnTypes',
'headerFiles',
'globalVariableUsage',
'useSymbolicConstants',
'generateDeadCode',
'requiredSelectors',
'previousCommentMarksInlining',
'previousCommenter',
'logger',
'suppressAsmLabels',
'asmLabelCounts',
'pools',
'selectorTranslations',
'staticallyResolvedPolymorphicReceivers',
'optionsDictionary',
'breakSrcInlineSelectors',
'breakDestInlineSelectors',
'breakOnInline',
'environment',
'compileTimeOptions',
'stopOnErrors',
'castTranslationDict',
'castAsArgumentTranslationDict',
'wordSize'
],
#classVars : [
'NoRegParmsInAssertVMs'
],
#category : #'Slang-CodeGeneration'
}
{ #category : #'class initialization' }
CCodeGenerator class >> initialize [
"CCodeGenerator initialize"
NoRegParmsInAssertVMs := true
"If NoRegParmsInAssertVMs is true the generator spits out an attribute turning off register parameters for static functions in the Assert and Debug VMs which makes debugging easier, since all functions can be safely called from gdb. One might hope that -mregparm=0 would work but at least on Mac OS X's gcc 4.2.1 it does not and hence we have to use a per funciton attribute. Sigh..."
]
{ #category : #testing }
CCodeGenerator class >> isVarargsSelector: aRBSelectorNode [
^aRBSelectorNode value endsWith: 'printf:'
]
{ #category : #'C code generator' }
CCodeGenerator class >> monticelloDescriptionFor: aClass [
"Answer a suitable Monticello package stamp to include in the header."
| pkgInfo pkg uuid |
pkgInfo := aClass package.
pkg := MCWorkingCopy allManagers detect: [:ea| ea packageName = pkgInfo packageName].
pkg ancestry ancestors isEmpty ifFalse:
[uuid := pkg ancestry ancestors first id].
^aClass name, (pkg modified ifTrue: [' * '] ifFalse: [' ']), pkg ancestry ancestorString, ' uuid: ', uuid asString
]
{ #category : #'C translation support' }
CCodeGenerator class >> reservedWords [
^#( 'auto'
'break'
'case' 'char' 'const' 'continue'
'default' 'do' 'double'
'else' "'entry' obsolete" 'enum' 'extern'
'float' 'for'
'goto'
'if' 'int'
'long'
'register' 'return'
'short' 'signed' 'sizeof' 'static' 'struct' 'switch'
'typedef'
'union' 'unsigned'
'void' 'volatile'
'while')
]
{ #category : #'C code generator' }
CCodeGenerator class >> shortMonticelloDescriptionForClass: aClass [
"Answer a suitable Monticello package stamp to include in a moduleName."
| mdesc |
mdesc := [self monticelloDescriptionFor: aClass]
on: Error
do: [:ex| ^' ', Date today asString].
^mdesc copyFrom: 1 to: (mdesc indexOfSubCollection: ' uuid:') - 1
]
{ #category : #accessing }
CCodeGenerator >> abortBlock [
^ nil
]
{ #category : #public }
CCodeGenerator >> addAllClassVarsFor: aClass [
"Add the class variables for the given class (and its superclasses) to the code base as constants."
| allClasses |
allClasses := aClass withAllSuperclasses.
allClasses do: [:c | self addClassVarsFor: c].
]
{ #category : #public }
CCodeGenerator >> addClass: aClass [
"Add the variables and methods of the given class to the code base."
self addClass: aClass silently: false
]
{ #category : #public }
CCodeGenerator >> addClass: aClass silently: silentlyBoolean [
"Add the variables and methods of the given class to the code base."
aClass prepareToBeAddedToCodeGenerator: self.
self checkClassForNameConflicts: aClass.
self addClassVarsFor: aClass.
"ikp..."
self addPoolVarsFor: aClass.
(aClass inheritsFrom: SlangStructType) ifFalse:
[variables addAll: (self instVarNamesForClass: aClass)].
self retainMethods: (aClass requiredMethodNames: self options).
silentlyBoolean ifTrue: [
aClass selectors do: [:sel | self addMethodFor: aClass selector: sel ].
aClass declareCVarsIn: self.
^ self
].
"Not silent"
UIManager default
displayProgress: 'Adding Class ' , aClass name , '...'
from: 0
to: aClass selectors size
during:
[:bar |
aClass selectors doWithIndex:
[:sel :i |
bar value: i.
self addMethodFor: aClass selector: sel]].
aClass declareCVarsIn: self
]
{ #category : #public }
CCodeGenerator >> addClassVarsFor: aClass [
"Add the class variables for the given class to the code base as constants."
aClass classPool associationsDo:
[:assoc | self addConstantForBinding: assoc]
]
{ #category : #public }
CCodeGenerator >> addConstantForBinding: variableBinding [
"Add the pool variable to the code base as a constant."
| node val |
val := variableBinding value.
node := (useSymbolicConstants and: [self isCLiteral: val])
ifTrue:[TDefineNode new
setName: variableBinding key
value: variableBinding value]
ifFalse:[TConstantNode value: variableBinding value].
constants at: variableBinding key put: node
]
{ #category : #public }
CCodeGenerator >> addHeaderFile: aString [
"Add a header file. As a hack we allow C preprocessor defs such as #ifdef"
self assert: (('"<#' includes: aString first) or: [(aString last: 2) = '_H']).
(aString first ~= $#
and: [headerFiles includes: aString]) ifTrue:
[logger nextPutAll: 'warning, attempt to include ', aString, ' a second time'; cr; flush.
^self].
headerFiles addLast: aString
]
{ #category : #public }
CCodeGenerator >> addHeaderFileFirst: aString [
"Add a header file to the front of the sequence."
self assert: (('"<' includes: aString first) and: ['">' includes: aString last]).
self assert: (headerFiles includes: aString) not.
headerFiles addFirst: aString
]
{ #category : #public }
CCodeGenerator >> addMacro: aString for: selector [
"Add a macro. aString must be the macro arguments and body without the leading #define or name"
macros at: selector put: aString
]
{ #category : #utilities }
CCodeGenerator >> addMethod: aTMethod [
"Add the given method to the code base and answer it.
Only allow duplicate definitions for struct accessors, since we don't actually
generate code for these methods and hence the conflict doesn't matter.
Allow subclasses to redefine methods (Smalltalk has inheritance after all)."
(methods at: aTMethod selector ifAbsent: []) ifNotNil:
[:conflict |
aTMethod compiledMethod isSubclassResponsibility ifTrue:
[^nil].
(conflict isStructAccessor
and: [aTMethod isStructAccessor
and: [conflict compiledMethod decompileString = aTMethod compiledMethod decompileString]]) ifTrue:
[^nil].
((aTMethod definingClass inheritsFrom: conflict definingClass)
or: [(aTMethod compiledMethod pragmaAt: #option:) notNil]) ifFalse:
[self error: 'Method name conflict: ', aTMethod selector]].
^methods at: aTMethod selector put: aTMethod
]
{ #category : #utilities }
CCodeGenerator >> addMethodFor: aClass selector: selector [
"Add the given method to the code base and answer its translation
or nil if it shouldn't be translated."
| method tmethod |
method := aClass compiledMethodAt: selector.
(method pragmaAt: #halt) ifNotNil: [ 1halt ].
(method pragmaAt: #doNotGenerate) ifNotNil:
["only remove a previous method if this one overrides it, i.e. this is a subclass method.
If the existing method is in a different hierarchy this method must be merely a redeirect."
(methods at: selector ifAbsent: []) ifNotNil:
[:tm|
(aClass includesBehavior: tm definingClass) ifTrue:
[self removeMethodForSelector: selector]].
^nil].
method isSubclassResponsibility ifTrue:
[^nil].
(self shouldIncludeMethodFor: aClass selector: selector) ifFalse:
[^nil].
tmethod := self compileToTMethodSelector: selector in: aClass.
"Even though we exclude initialize methods, we must consider their
global variable usage, otherwise globals may be incorrectly localized."
selector == #initialize ifTrue:
[self checkForGlobalUsage: (tmethod allReferencedVariablesUsing: self) in: tmethod.
^nil].
self addMethod: tmethod.
"If the method has a macro then add the macro. But keep the method
for analysis purposes (e.g. its variable accesses)."
(method pragmaAt: #cmacro:) ifNotNil:
[:pragma|
self addMacro: (pragma argumentAt: 1) for: selector.
(inlineList includes: selector) ifTrue:
[inlineList := inlineList copyWithout: selector]].
(method pragmaAt: #cmacro) ifNotNil:
[:pragma| | literal | "Method should be just foo ^const"
self assert: (method numArgs = 0 and: [method numLiterals = 3 or: [method isQuick]]).
literal := method isQuick
ifTrue: [method decompile quickMethodReturnLiteral]
ifFalse: [method literalAt: 1].
self addMacro: '() ', (method isReturnField
ifTrue: [literal]
ifFalse: [self cLiteralFor: literal value name: method selector]) for: selector.
(inlineList includes: selector) ifTrue:
[inlineList := inlineList copyWithout: selector]].
^tmethod
]
{ #category : #public }
CCodeGenerator >> addMethodsForTranslatedPrimitives: classAndSelectorList [
| verbose |
verbose := false.
classAndSelectorList do:
[:classAndSelector | | aClass selector meth |
aClass := Smalltalk at: classAndSelector first.
selector := classAndSelector last.
self addAllClassVarsFor: aClass.
"compile the method source and convert to a suitable translation method.
find the method in either the class or the metaclass"
meth := self
compileToTMethodSelector: selector
in: ((aClass includesSelector: selector)
ifTrue: [aClass]
ifFalse: [aClass class]).
meth primitive > 0 ifTrue:
[meth preparePrimitiveName].
meth replaceSizeMessages.
self addMethod: meth].
self prepareMethods
]
{ #category : #public }
CCodeGenerator >> addPoolVarsFor: aClass [
"Add the pool variables for the given class to the code base as constants."
(aClass sharedPools reject: [:pool| pools includes: pool]) do:
[:pool |
pools add: pool.
pool bindingsDo:
[:binding |
self addConstantForBinding: binding]]
]
{ #category : #public }
CCodeGenerator >> addSelectorTranslation: aSelector to: aString [
selectorTranslations at: aSelector asSymbol put: aString
]
{ #category : #public }
CCodeGenerator >> addStructClass: aClass [
"Add the non-accessor methods of the given struct class to the code base."
^ self addStructClass: aClass silently: false
]
{ #category : #public }
CCodeGenerator >> addStructClass: aClass silently: silentlyBoolean [
"Add the non-accessor methods of the given struct class to the code base."
aClass prepareToBeAddedToCodeGenerator: self.
self addClassVarsFor: aClass.
self addPoolVarsFor: aClass.
self retainMethods: (aClass requiredMethodNames: self options).
"Silent version"
silentlyBoolean ifTrue: [
aClass selectors do: [:sel | self addStructMethodFor: aClass selector: sel ].
aClass declareCVarsIn: self.
^ self
].
"Non silent version"
UIManager default
displayProgress: 'Adding Class ' , aClass name , '...'
from: 0
to: aClass selectors size
during:
[:bar |
aClass selectors doWithIndex:
[:sel :i |
bar value: i.
self addStructMethodFor: aClass selector: sel]].
aClass declareCVarsIn: self
]
{ #category : #accessing }
CCodeGenerator >> addStructClasses: classes [
"Add the struct classes and save them for emitCTypesOn: later."
structClasses := classes.
structClasses do:
[:structClass|
(structClass withAllSuperclasses copyUpTo: structClass baseStructClass) do:
[:structClassOrSuperclass|
self addStructClass: structClassOrSuperclass]]
]
{ #category : #accessing }
CCodeGenerator >> addStructClasses: classes silently: aSilentlyBoolean [
"Add the struct classes and save them for emitCTypesOn: later."
structClasses := classes.
structClasses do:
[:structClass|
(structClass withAllSuperclasses copyUpTo: SlangStructType) do:
[:structClassOrSuperclass|
self addStructClass: structClassOrSuperclass silently: aSilentlyBoolean ]]
]
{ #category : #utilities }
CCodeGenerator >> addStructMethodFor: aClass selector: selector [
"Add the given struct method to the code base and answer its translation
or nil if it shouldn't be translated."
(self methodNamed: selector) ifNotNil:
[:tmethod|
"If we're repeating an attempt to add the same thing, or
if the existing method overrides this one,don't complain."
(tmethod definingClass includesBehavior: aClass) ifTrue:
[^self].
"If the methods are both simple accessors, don't complain."
((tmethod definingClass isAccessor: selector)
and: [aClass isAccessor: selector]) ifTrue:
[^self].
"If the method is overriding a method in a superclass, don't complain"
(aClass inheritsFrom: tmethod definingClass)
ifTrue: [methods removeKey: selector]
ifFalse: [self error: 'conflicting implementations for ', selector storeString]].
^(self addMethodFor: aClass selector: selector) ifNotNil:
[:tmethod|
tmethod transformToStructClassMethodFor: self.
tmethod]
]
{ #category : #utilities }
CCodeGenerator >> addVariablesInVerbatimCIn: aCCodeSendNode to: aCollection [
"If aCCodeSendNode has a string argument, parse it and extract anything
that looks like a variable, and add the resulting vars to aCollection."
| separators tokens |
(aCCodeSendNode isSend and: [
(aCCodeSendNode selector beginsWith: #cCode:) and: [
aCCodeSendNode arguments first isConstant and: [
aCCodeSendNode arguments first value isString ] ] ]) ifFalse: [
^ self ].
separators := (Character space to: 255 asCharacter) reject: [ :char |
char isLetter or: [ char isDigit or: [ char = $_ ] ] ].
tokens := aCCodeSendNode arguments first value findTokens: separators.
aCollection addAll:
(tokens select: [ :token | token first isLetter ]) asSet
]
{ #category : #utilities }
CCodeGenerator >> anyMethodNamed: selector [
"Answer any method in the code base (including api methods) with the given selector."
^methods
at: selector
ifAbsent:
[apiMethods ifNotNil:
[apiMethods
at: selector
ifAbsent: []]]
]
{ #category : #accessing }
CCodeGenerator >> apiMethods [
^ apiMethods
]
{ #category : #utilities }
CCodeGenerator >> arrayInitializerCalled: varName for: array sizeString: sizeStringOrNil type: cType [
"array is a literal array or a CArray on some array."
^String streamContents:
[:s| | sequence lastLine index newLine allIntegers |
sequence := array isCollection ifTrue: [array] ifFalse: [array object].
"this is to align -ve and +ve integers nicely in the primitiveAccessorDepthTable"
allIntegers := sequence allSatisfy: [:element| element isInteger].
lastLine := index := 0.
newLine := [sequence size >= 20
ifTrue: [s cr; nextPutAll: '/*'; print: index; nextPutAll: '*/'; tab]
ifFalse: [s crtab: 2].
lastLine := s position].
s nextPutAll: cType;
space;
nextPutAll: varName;
nextPut: $[.
sizeStringOrNil ifNotNil: [s nextPutAll: sizeStringOrNil].
s nextPutAll: '] = '.
sequence isString
ifTrue: [s nextPutAll: (self cLiteralFor: sequence)]
ifFalse:
[s nextPut: ${.
newLine value.
sequence
do: [:element|
(allIntegers
and: [element < 0
and: [s peekLast = Character space]]) ifTrue:
[s skip: -1].
s nextPutAll: (self cLiteralFor: element). index := index + 1]
separatedBy:
[s nextPut: $,.
((s position - lastLine) >= 76
or: [(index \\ 20) = 0])
ifTrue: [newLine value]
ifFalse: [s space]].
s crtab; nextPut: $}]]
]
{ #category : #utilities }
CCodeGenerator >> asmLabelNodeFor: selector [
| count label |
suppressAsmLabels ifTrue: [^CEmptyStatementNode new].
asmLabelCounts ifNil:
[asmLabelCounts := Dictionary new].
count := asmLabelCounts
at: selector
put: 1 + (asmLabelCounts at: selector ifAbsent: [-1]).
label := (self cFunctionNameFor: selector), (count = 0 ifTrue: [''] ifFalse: [count printString]).
^ CCallNode
identifier: (CIdentifierNode name: 'VM_LABEL')
arguments: { CIdentifierNode name: label }
]
{ #category : #utilities }
CCodeGenerator >> baseTypeForPointerType: aCType [
"Answer the type of the referent of a pointer type."
self assert: aCType last == $*.
^self baseTypeForType: aCType allButLast
]
{ #category : #utilities }
CCodeGenerator >> baseTypeForType: aCType [
"Reduce various declarations to the most basic type we can determine."
| type fpIndex closeidx openidx |
type := aCType.
((openidx := type indexOfSubCollection: 'const ') > 0
and: [openidx = 1 or: [(type at: openidx) isSeparator]]) ifTrue:
[type := type copyReplaceFrom: openidx to: openidx + 5 with: ''].
((type beginsWith: 'unsigned') and: [(type includes: $:) and: [type last isDigit]]) ifTrue:
[^#usqInt].
"collapse e.g. void (*foo(int bar))(void) to void (*)(void)"
(fpIndex := type indexOfSubCollection: '(*') > 0 ifTrue:
["elide the function arguments after *, if there are any"
type := type copyReplaceFrom: (type indexOf: $( startingAt: fpIndex + 1)
to: (type indexOf: $) startingAt: fpIndex + 1)
with: ''.
"elide the function name after *, if there is one"
type := type copyReplaceFrom: fpIndex + 2
to: (type indexOf: $) startingAt: fpIndex + 1)
with: ')'].
"collapse [size] to *"
openidx := 0.
[(openidx := type indexOf: $[ startingAt: openidx + 1) > 0
and: [(closeidx := type indexOf: $] startingAt: openidx + 1) > 0]] whileTrue:
[type := type copyReplaceFrom: openidx to: closeidx with: '*'].
"map foo* to foo *"
^self conventionalTypeForType: type
]
{ #category : #accessing }
CCodeGenerator >> breakDestInlineSelector: aSelector [
breakDestInlineSelectors add: aSelector
]
{ #category : #accessing }
CCodeGenerator >> breakOnInline: aBooleanOrNil [
breakOnInline := aBooleanOrNil
]
{ #category : #accessing }
CCodeGenerator >> breakSrcInlineSelector: aSelector [
breakSrcInlineSelectors add: aSelector
]
{ #category : #inlining }
CCodeGenerator >> bytesPerOop [
^ 8
]
{ #category : #inlining }
CCodeGenerator >> bytesPerWord [
^ 8
]
{ #category : #utilities }
CCodeGenerator >> cCodeForMethod: selector [
"Answer a string containing the C code for the given method."
"Example:
((CCodeGenerator new initialize addClass: TestCClass1; prepareMethods)
cCodeForMethod: #ifTests)"
| m s cast |
m := self methodNamed: selector.
m = nil ifTrue: [
self error: 'method not found in code base: ' , selector ].
s := ReadWriteStream on: ''.
cast := m asCASTIn: self.
cast prettyPrintOn: s.
^ s contents
]
{ #category : #'C code generator' }
CCodeGenerator >> cFunctionNameFor: aSelector [
"Create a C function name from the given selector by finding
a specific translation, or if none, simply omitting colons, and
any trailing underscores (this supports a varargs convention)."
^selectorTranslations
at: aSelector
ifAbsent:
[| cSelector |
cSelector := aSelector copyWithout: $:.
aSelector last = $: ifTrue:
[[cSelector last = $_] whileTrue:
[cSelector := cSelector allButLast]].
cSelector]
]
{ #category : #'C code generator' }
CCodeGenerator >> cLiteralFor: anObject [
"Return a string representing the C literal value for the given object."
anObject isNumber
ifTrue:
[anObject isInteger ifTrue:
[| hex |
hex := (anObject > 0
and: [(anObject >> anObject lowBit + 1) isPowerOfTwo
and: [(anObject highBit = anObject lowBit and: [anObject > 65536])
or: [anObject highBit - anObject lowBit >= 4]]]).
^self cLiteralForInteger: anObject hex: hex].
anObject isFloat ifTrue:
[^anObject printString]]
ifFalse:
[anObject isSymbol ifTrue:
[^self cFunctionNameFor: anObject].
anObject isString ifTrue:
[^'"', (anObject copyReplaceAll: (String with: Character cr) with: '\n') , '"'].
anObject == nil ifTrue: [^ self nilTranslation ].
anObject == true ifTrue: [^ '1' ].
anObject == false ifTrue: [^ '0' ].
anObject isCharacter ifTrue:
[^anObject == $'
ifTrue: ['''\'''''] "i.e. '\''"
ifFalse: [anObject asString printString]]].
self error: 'Warning: A Smalltalk literal could not be translated into a C constant: ', anObject printString.
^'"XXX UNTRANSLATABLE CONSTANT XXX"'
]
{ #category : #'C code generator' }
CCodeGenerator >> cLiteralFor: anObject name: smalltalkName [
"Return a string representing the C literal value for the given object.
This version may use hex for integers that are bit masks."
anObject isInteger
ifTrue: [ | hex dec useHexa |
hex := anObject printStringBase: 16.
dec := anObject printStringBase: 10.
useHexa := (smalltalkName endsWith: 'Mask')
or: [ anObject bytesCount > 1
and: [ hex asSet size * 3 <= (dec asSet size * 2)
and: [ (smalltalkName endsWith: 'Size') not ] ] ].
^ self cLiteralForInteger: anObject hex: useHexa ].
^ self cLiteralFor: anObject
]
{ #category : #'C code generator' }
CCodeGenerator >> cLiteralForInteger: anInteger hex: aBoolean [
"Answer the string for generating a literal integer.
Use hexadecimal notation as prescribed by aBoolean.
Use long long suffix (LL) if the integer does not fit on 32 bits.
Use unsigned suffix (U) if the integer does not fit on a signed integer (resp. long long).
Correctly generate INT_MIN and LONG_LONG_MIN.
Indeed -0x8000000 is parsed as - (0x8000000) by C Compiler.
0x8000000 does not fit on a signed int, it is interpreted as unsigned.
That makes INT_MIN unsigned which is badly broken..."
| printString |
printString := aBoolean
ifTrue: [anInteger positive
ifTrue: ['0x' , (anInteger printStringBase: 16)]
ifFalse: ['-0x' , (anInteger negated printStringBase: 16)]]
ifFalse: [anInteger printString].
^anInteger positive
ifTrue: [anInteger > 16r7FFFFFFF "INT_MAX"
ifTrue: [anInteger > 16rFFFFFFFF "UINT_MAX"
ifTrue: [anInteger > 16r7FFFFFFFFFFFFFFF "LONG_LONG_MAX"
ifTrue: [printString , 'ULL']
ifFalse: [printString , 'LL']]
ifFalse: [printString , 'U']]
ifFalse: [printString]]
ifFalse: [anInteger < -16r8000000
ifTrue: [anInteger = -16r800000000000000 "LONG_LONG_MIN"
ifTrue: ['(-0x7FFFFFFFFFFFFFFFLL-1)']
ifFalse: [printString , 'LL']]
ifFalse: [anInteger = -16r8000000 "INT_MIN"
ifTrue: ['(-0x7FFFFFFF-1)']
ifFalse: [printString]]]
]
{ #category : #'C code generator' }
CCodeGenerator >> cLiteralForPrintfString: aString [
^(('"', (PrintfFormatString new setFormat: aString) transformForVMMaker, '"')
copyReplaceAll: (String with: Character cr) with: '\n')
copyReplaceAll: (String with: Character tab) with: '\t'
]
{ #category : #'C code generator' }
CCodeGenerator >> cLiteralForUnsignedInteger: anInteger hex: aBoolean longlong: llBoolean [
"Answer the string for generating an unsigned literal integer.
Use hexadecimal notation as prescribed by aBoolean.
Force long long suffix (LL) if the integer does not fit on 32 bits, or if llBoolean is true."
| printString |
printString := aBoolean
ifTrue: [anInteger positive
ifTrue: ['0x' , (anInteger printStringBase: 16)]
ifFalse: ['-0x' , (anInteger negated printStringBase: 16)]]
ifFalse: [anInteger printString].
^anInteger positive
ifTrue: [(llBoolean or: [anInteger > 16rFFFFFFFF "UINT_MAX"])
ifTrue: [printString , 'ULL']
ifFalse: [printString , 'U']]
ifFalse: [self error: 'please provide positive integer']
]
{ #category : #'C code generator' }
CCodeGenerator >> cLiteralForUnsignedInteger: anInteger longlong: llBoolean [
"Answer the string for generating an unsigned literal integer.
Eventually use hexadecimal.
Force long long suffix (LL) if the integer does not fit on 32 bits, or if llBoolean is true."
| hex |
hex := (anInteger > 0
and: [(anInteger >> anInteger lowBit + 1) isPowerOfTwo
and: [(anInteger highBit = anInteger lowBit and: [anInteger > 65536])
or: [anInteger highBit - anInteger lowBit >= 4]]]).
^self cLiteralForUnsignedInteger: anInteger hex: hex longlong: llBoolean
]
{ #category : #inlining }
CCodeGenerator >> cannotInline: selector [
self error: 'Failed to inline ', selector,
' as it contains unrenamable C declarations or C code'
]
{ #category : #'error notification' }
CCodeGenerator >> checkClassForNameConflicts: aClass [
"Verify that the given class does not have constant, variable, or method names that conflict with
those of previously added classes. Raise an error if a conflict is found, otherwise just return."
"check for constant name collisions in class pools"
aClass classPool associationsDo:
[:assoc |
(constants includesKey: assoc key) ifTrue:
[self error: 'Constant ', assoc key, ' was defined in a previously added class']].
"and in shared pools"
(aClass sharedPools reject: [:pool| pools includes: pool]) do:
[:pool |
pool bindingsDo:
[:assoc |
(constants includesKey: assoc key) ifTrue:
[self error: 'Constant ', assoc key, ' was defined in a previously added class']]].
"check for instance variable name collisions"
(aClass inheritsFrom: SlangStructType) ifFalse:
[(self instVarNamesForClass: aClass) do:
[:varName |
(variables includes: varName) ifTrue:
[self error: 'Instance variable ', varName, ' was defined in a previously added class']]].
"check for method name collisions"
aClass selectors do:
[:sel | | tmeth meth |
((self shouldIncludeMethodFor: aClass selector: sel)
and: [(tmeth := methods at: sel ifAbsent: nil) notNil
and: [(aClass isStructClass and: [(aClass isAccessor: sel)
and: [(methods at: sel) isStructAccessor]]) not
and: [(meth := aClass >> sel) isSubclassResponsibility not
and: [(aClass includesBehavior: tmeth definingClass) not]]]]) ifTrue:
[((aClass >>sel) pragmaAt: #option:)
ifNil: [self error: 'Method ', sel, ' was defined in a previously added class.']
ifNotNil:
[logger
newLine;
show: 'warning, method ', aClass name, '>>', sel storeString,
' overrides ', tmeth definingClass, '>>', sel storeString;
cr]]]
]
{ #category : #utilities }
CCodeGenerator >> checkForGlobalUsage: vars in: aTMethod [
vars do:
[:var |
(variables includes: var) ifTrue: "find the set of method names using this global var"
[(globalVariableUsage at: var ifAbsentPut: [Set new])
add: aTMethod selector]].
aTMethod clearReferencesToGlobalStruct.
(aTMethod allLocals select: [:l| self reservedWords includes: l]) do:
[:l| | em |
em := aTMethod definingClass name, '>>', aTMethod smalltalkSelector, ' has variable that is a C reserved word: ', l.
self error: em.
self logger cr; nextPutAll: em; cr; flush]
]
{ #category : #inlining }
CCodeGenerator >> collectInlineList: strategy [
"Make a list of methods that should be inlined. If inlineFlagOrSymbol == #asSpecified
only inline methods marked with <inline: true>. If inlineFlagOrSymbol == #asSpecifiedOrQuick
only inline methods marked with <inline: true> or methods that are quick (^constant, ^inst var)."
"Details: The method must not include any inline C, since the
translator cannot currently map variable names in inlined C code.
Methods to be inlined must be small or called from only one place."
| selectorsOfMethodsNotToInline callsOf inlineStrategy selectorsWithBlocks |
inlineStrategy := strategy asCCodeInlineStrategy.
inlineStrategy codeGenerator: self.
"Set of selectors that takes blocks as argument. The associated methods must be inlined and not compiled separately."
selectorsWithBlocks := Set new.
selectorsOfMethodsNotToInline := Set new: methods size.
selectorsOfMethodsNotToInline addAll: macros keys.
apiMethods ifNotNil: [ selectorsOfMethodsNotToInline addAll: apiMethods keys ].
selectorsOfMethodsNotToInline addAll: self structAccessorSelectors.
"build dictionary to record the number of calls to each method"
callsOf := Dictionary new: methods size * 2.
methods keysAndValuesDo:
[:s :m|
(m isRealMethod
and: [self shouldGenerateMethod: m]) ifTrue:
[callsOf at: s put: 0]].
"For each method, scan its parse tree once or twice to:
1. determine if the method contains unrenamable C code or declarations or has a C builtin
2. determine how many nodes it has
3. increment the sender counts of the methods it calls"
inlineList := Set new: methods size * 2.
methods
reject: [:m|
(selectorsOfMethodsNotToInline includes: m selector)
or: [ self isSpecialSelector: m selector ] ]
thenDo: [:m|
m parseTree nodesDo: [:node|
node isSend ifTrue: [
"Special case of methods that takes block as arguments.
The only way to call them is to inline them since blocks are not values in C."
(node arguments anySatisfy: [ :arg | arg class == TStatementListNode ])
ifTrue: [ selectorsWithBlocks add: node selector. ].
"Increase call count"
callsOf
at: node selector
ifPresent: [:senderCount| callsOf at: node selector put: senderCount + 1 ] ] ].
inlineStrategy validateCanInline: m.
(inlineStrategy canInline: m)
ifFalse: [ selectorsOfMethodsNotToInline add: m selector ]
ifTrue: [
(inlineStrategy shouldInlineMethod: m)
ifTrue: [
"inline if method has no C code and is either small or contains inline directive"
inlineList add: m selector]
ifFalse: [
inlineStrategy isSelectiveInlineStrategy
ifTrue: [selectorsOfMethodsNotToInline add: m selector] ] ] ].
"Inline all methods that takes block and mark them inline:#always to ensure they are not compiled sepately"
inlineList addAll: selectorsWithBlocks.
methods select: [ :m | selectorsWithBlocks includes: m selector ] thenDo: [ :m | m inline: #always ].
inlineStrategy isSelectiveInlineStrategy
ifTrue:
[methods do: [:m| m inline ifNil: [m inline: (inlineList includes: m selector)]]]
ifFalse:
[callsOf associationsDo:
[:assoc|
(assoc value = 1
and: [(selectorsOfMethodsNotToInline includes: assoc key) not]) ifTrue:
[ inlineList add: assoc key ]]]
]
{ #category : #accessing }
CCodeGenerator >> compileTimeOptions: aCollection [
compileTimeOptions := aCollection
]
{ #category : #utilities }
CCodeGenerator >> compileToTMethodSelector: selector in: aClass [
"Compile a method to a TMethod"
^ aClass >> selector
asTranslationMethodOfClass: self translationMethodClass
forCodeGenerator: self
]
{ #category : #public }
CCodeGenerator >> const: constName declareC: declarationString [
"Record the given C declaration for a constant."
constants
at: constName
put: (TDefineNode new
setName: constName
value: declarationString)
]
{ #category : #'C code generator' }
CCodeGenerator >> constants [
^ constants keys
]
{ #category : #utilities }
CCodeGenerator >> conventionalTypeForType: aCTypeString [
"The pointer type convention in this version of VMMaker is to have a space between the base type and any *'s.
C type comparisons are simple string comparisons; therefore the convention matters.
Ensure there is a space between the base type and any trailing *'s. Trim whitespace."
| type index |
type := aCTypeString withBlanksTrimmed.
index := type size.
[(type at: index) == $*] whileTrue:
[index := index - 1].
(index < type size
and: [(type at: index) ~~ Character space]) ifTrue:
[type := (type copyFrom: 1 to: index), ' ', (type copyFrom: index + 1 to: type size)].
^type asSymbol
]
{ #category : #accessing }
CCodeGenerator >> currentMethod [
"The method is the bottom of the scope stack"
^ scopeStack first
]
{ #category : #accessing }
CCodeGenerator >> currentMethod: aTMethod [
scopeStack := OrderedCollection with: aTMethod.
previousCommenter := nil
]
{ #category : #accessing }
CCodeGenerator >> currentScope [
^ scopeStack last
]
{ #category : #'C code generator' }
CCodeGenerator >> declarationAt: aVariableName ifAbsent: absentBlock [
scopeStack reverseDo: [:scope|
scope declarationAt: aVariableName ifPresent: [ :declaration | ^ declaration ] ].
variableDeclarations
at: aVariableName
ifPresent: [ :declaration | ^ declaration ].
^(constants at: aVariableName ifAbsent: [ ^ absentBlock value ]) ifNotNil:
[:const|
const value isInteger
ifTrue: [self defaultType]
ifFalse:
[const value isFloat ifTrue:
[#double]]]
]
{ #category : #public }
CCodeGenerator >> declareModuleName: nameString [
"add the declaration of a module name, version and local/external tag"
self var: #moduleName declareC:'const char *moduleName =
#ifdef SQUEAK_BUILTIN_PLUGIN
"', nameString,' (i)"
#else
"', nameString,' (e)"
#endif
'.
"and for run-time use, answer the string"
^nameString, ' (i)'
]
{ #category : #public }
CCodeGenerator >> declareVar: varName type: type [
"This both creates a varable and provides its type"
self var: (variables add: varName asString) type: type
]
{ #category : #'C code generator' }
CCodeGenerator >> declaredConstants [
^ constants keys asSet
]
{ #category : #'type inference' }
CCodeGenerator >> defaultType [
^ #int
]
{ #category : #'compile-time-options' }
CCodeGenerator >> defineAtCompileTime: aString [
"Define if the code generator should define the option at compile time or at generation time.
If true, the decision of the option will be delayed to compilation time.
Otherwise, do it at transpilation time,
- the code with the option is generated if the value of the option is true
- if not true or unset, do not generate"
compileTimeOptions ifNil: [ ^ false ].
^ (compileTimeOptions includes: aString)
]
{ #category : #inlining }
CCodeGenerator >> doBasicInlining: inlineFlagOrSymbol [
"Inline the bodies of all methods that are suitable for inlining.
This method does only the basic inlining suitable for both the core VM and plugins - no bytecode inlining etc"
| pass progress |
self collectInlineList: inlineFlagOrSymbol.
pass := 0.
progress := true.
[progress] whileTrue: [
"repeatedly attempt to inline methods until no further progress is made"