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assemble-helpers.rkt
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assemble-helpers.rkt
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#lang typed/racket/base
(require "../compiler/il-structs.rkt"
"../compiler/expression-structs.rkt"
"../compiler/lexical-structs.rkt"
"../compiler/arity-structs.rkt"
"assemble-structs.rkt"
racket/list
racket/string
racket/match)
(provide assemble-oparg
assemble-target
assemble-const
assemble-lexical-reference
assemble-prefix-reference
assemble-whole-prefix-reference
assemble-reg
munge-label-name
assemble-label
assemble-listof-assembled-values
assemble-default-continuation-prompt-tag
assemble-env-reference/closure-capture
assemble-arity
assemble-jump
assemble-display-name
assemble-location
assemble-numeric-constant
block-looks-like-context-expected-values?
block-looks-like-pop-multiple-values-and-continue?)
(require/typed typed/racket/base
[regexp-split (Regexp String -> (Listof String))])
(: assemble-oparg (OpArg Blockht -> String))
(define (assemble-oparg v blockht)
(cond
[(Reg? v)
(assemble-reg v)]
[(Label? v)
(assemble-label v blockht)]
[(Const? v)
(assemble-const v)]
[(EnvLexicalReference? v)
(assemble-lexical-reference v)]
[(EnvPrefixReference? v)
(assemble-prefix-reference v)]
[(EnvWholePrefixReference? v)
(assemble-whole-prefix-reference v)]
[(SubtractArg? v)
(assemble-subtractarg v blockht)]
[(ControlStackLabel? v)
(assemble-control-stack-label v)]
[(ControlStackLabel/MultipleValueReturn? v)
(assemble-control-stack-label/multiple-value-return v)]
[(ControlFrameTemporary? v)
(assemble-control-frame-temporary v)]
[(CompiledProcedureEntry? v)
(assemble-compiled-procedure-entry v blockht)]
[(CompiledProcedureClosureReference? v)
(assemble-compiled-procedure-closure-reference v blockht)]
[(PrimitiveKernelValue? v)
(assemble-primitive-kernel-value v)]
[(ModuleEntry? v)
(assemble-module-entry v)]
[(IsModuleInvoked? v)
(assemble-is-module-invoked v)]
[(IsModuleLinked? v)
(assemble-is-module-linked v)]
[(VariableReference? v)
(assemble-variable-reference v)]))
(: assemble-target (Target -> (String -> String)))
(define (assemble-target target)
(cond
[(PrimitivesReference? target)
(lambda: ([rhs : String])
(format "RT.Primitives[~s]=RT.Primitives[~s]||~a;"
(symbol->string (PrimitivesReference-name target))
(symbol->string (PrimitivesReference-name target))
rhs))]
[else
(lambda: ([rhs : String])
(format "~a=~a;"
(cond
[(eq? target 'proc)
"M.p"]
[(eq? target 'val)
"M.v"]
[(eq? target 'argcount)
"M.a"]
[(EnvLexicalReference? target)
(assemble-lexical-reference target)]
[(EnvPrefixReference? target)
(assemble-prefix-reference target)]
[(ControlFrameTemporary? target)
(assemble-control-frame-temporary target)]
[(ModulePrefixTarget? target)
(format "M.modules[~s].prefix"
(symbol->string (ModuleLocator-name (ModulePrefixTarget-path target))))])
rhs))]))
(: assemble-control-frame-temporary (ControlFrameTemporary -> String))
(define (assemble-control-frame-temporary t)
(format "M.c[M.c.length-1].~a"
(ControlFrameTemporary-name t)))
;; fixme: use js->string
(: assemble-const (Const -> String))
(define (assemble-const stmt)
(let: loop : String ([val : const-value (Const-const stmt)])
(cond [(symbol? val)
(format "RT.makeSymbol(~s)" (symbol->string val))]
[(pair? val)
(format "RT.makePair(~a,~a)"
(loop (car val))
(loop (cdr val)))]
[(boolean? val)
(if val "true" "false")]
[(void? val)
"RT.VOID"]
[(empty? val)
(format "RT.NULL")]
[(number? val)
(assemble-numeric-constant val)]
[(string? val)
(format "~s" val)]
[(char? val)
(format "RT.makeChar(~s)" (string val))]
[(bytes? val)
;; This needs to be an array, because this may contain
;; a LOT of elements, and certain JS evaluators will break
;; otherewise.
(format "RT.makeBytes([~a])"
(string-join (for/list ([a-byte val])
(number->string a-byte))
","))]
[(path? val)
(format "RT.makePath(~s)"
(path->string val))]
[(vector? val)
(format "RT.makeVector(~a,[~a])"
(vector-length val)
(string-join (for/list ([elt (vector->list val)])
(loop elt))
","))]
[(box? val)
(format "RT.makeBox(~s)"
(loop (unbox val)))])))
(: assemble-listof-assembled-values ((Listof String) -> String))
(define (assemble-listof-assembled-values vals)
(let loop ([vals vals])
(cond
[(empty? vals)
"RT.NULL"]
[else
(format "RT.makePair(~a,~a)" (first vals) (loop (rest vals)))])))
;; Slightly ridiculous definition, but I need it to get around what appear to
;; be Typed Racket bugs in its numeric tower.
(define-predicate int? Integer)
(: assemble-numeric-constant (Number -> String))
(define (assemble-numeric-constant a-num)
(: floating-number->js (Real -> String))
(define (floating-number->js a-num)
(cond
[(eqv? a-num -0.0)
"RT.NEGATIVE_ZERO"]
[(eqv? a-num +inf.0)
"RT.INF"]
[(eqv? a-num -inf.0)
"RT.NEGATIVE_INF"]
[(eqv? a-num +nan.0)
"RT.NAN"]
[else
(string-append "RT.makeFloat(" (number->string a-num) ")")]))
;; FIXME: fix the type signature when typed-racket isn't breaking on
;; (define-predicate ExactRational? (U Exact-Rational))
(: rational-number->js (Real -> String))
(define (rational-number->js a-num)
(cond [(= (denominator a-num) 1)
(string-append (integer->js (ensure-integer (numerator a-num))))]
[else
(string-append "RT.makeRational("
(integer->js (ensure-integer (numerator a-num)))
","
(integer->js (ensure-integer (denominator a-num)))
")")]))
(: ensure-integer (Any -> Integer))
(define (ensure-integer x)
(if (int? x)
x
(error "not an integer: ~e" x)))
(: integer->js (Integer -> String))
(define (integer->js an-int)
(cond
;; non-overflow case
[(< (abs an-int) 9e15)
(number->string an-int)]
;; overflow case
[else
(string-append "RT.makeBignum("
(format "~s" (number->string an-int))
")")]))
(cond
[(and (exact? a-num) (rational? a-num))
(rational-number->js a-num)]
[(real? a-num)
(floating-number->js a-num)]
[(complex? a-num)
(string-append "RT.makeComplex("
(assemble-numeric-constant (real-part a-num))
","
(assemble-numeric-constant (imag-part a-num))
")")]))
(: assemble-lexical-reference (EnvLexicalReference -> String))
(define (assemble-lexical-reference a-lex-ref)
(if (EnvLexicalReference-unbox? a-lex-ref)
(format "M.e[M.e.length-~a][0]"
(add1 (EnvLexicalReference-depth a-lex-ref)))
(format "M.e[M.e.length-~a]"
(add1 (EnvLexicalReference-depth a-lex-ref)))))
(: assemble-prefix-reference (EnvPrefixReference -> String))
(define (assemble-prefix-reference a-ref)
(format "M.e[M.e.length-~a][~a]"
(add1 (EnvPrefixReference-depth a-ref))
(EnvPrefixReference-pos a-ref)))
(: assemble-whole-prefix-reference (EnvWholePrefixReference -> String))
(define (assemble-whole-prefix-reference a-prefix-ref)
(format "M.e[M.e.length-~a]"
(add1 (EnvWholePrefixReference-depth a-prefix-ref))))
(: assemble-reg (Reg -> String))
(define (assemble-reg a-reg)
(let ([name (Reg-name a-reg)])
(cond
[(eq? name 'proc)
"M.p"]
[(eq? name 'val)
"M.v"]
[(eq? name 'argcount)
"M.a"])))
(: munge-label-name (Label -> String))
(define (munge-label-name a-label)
(define chunks
(regexp-split #rx"[^a-zA-Z0-9]+"
(symbol->string (Label-name a-label))))
(cond
[(empty? chunks)
(error "impossible: empty label ~s" a-label)]
[(empty? (rest chunks))
(string-append "_" (first chunks))]
[else
(string-append "_"
(first chunks)
(apply string-append (map string-titlecase (rest chunks))))]))
(: assemble-label (Label Blockht -> String))
(define (assemble-label a-label Blockht)
(munge-label-name a-label))
(: assemble-subtractarg (SubtractArg Blockht -> String))
(define (assemble-subtractarg s blockht)
(format "(~a-~a)"
(assemble-oparg (SubtractArg-lhs s) blockht)
(assemble-oparg (SubtractArg-rhs s) blockht)))
(: assemble-control-stack-label (ControlStackLabel -> String))
(define (assemble-control-stack-label a-csl)
"M.c[M.c.length-1].label")
(: assemble-control-stack-label/multiple-value-return (ControlStackLabel/MultipleValueReturn -> String))
(define (assemble-control-stack-label/multiple-value-return a-csl)
"(M.c[M.c.length-1].label.mvr||RT.si_context_expected_1)")
(: assemble-compiled-procedure-entry (CompiledProcedureEntry Blockht -> String))
(define (assemble-compiled-procedure-entry a-compiled-procedure-entry blockht)
(format "(~a).label"
(assemble-oparg (CompiledProcedureEntry-proc a-compiled-procedure-entry)
blockht)))
(: assemble-compiled-procedure-closure-reference (CompiledProcedureClosureReference Blockht -> String))
(define (assemble-compiled-procedure-closure-reference a-ref blockht)
(format "(~a).closedVals[(~a).closedVals.length - ~a]"
(assemble-oparg (CompiledProcedureClosureReference-proc a-ref) blockht)
(assemble-oparg (CompiledProcedureClosureReference-proc a-ref) blockht)
(add1 (CompiledProcedureClosureReference-n a-ref))))
(: assemble-default-continuation-prompt-tag (-> String))
(define (assemble-default-continuation-prompt-tag)
"RT.DEFAULT_CONTINUATION_PROMPT_TAG")
(: assemble-env-reference/closure-capture (Natural -> String))
;; When we're capturing the values for a closure, we need to not unbox
;; lexical references: they must remain boxes. So all we need is
;; the depth into the environment.
(define (assemble-env-reference/closure-capture depth)
(format "M.e[M.e.length-~a]"
(add1 depth)))
(define-predicate natural? Natural)
(: assemble-arity (Arity -> String))
(define (assemble-arity an-arity)
(cond
[(natural? an-arity)
(number->string an-arity)]
[(ArityAtLeast? an-arity)
(format "(RT.makeArityAtLeast(~a))"
(ArityAtLeast-value an-arity))]
[(listof-atomic-arity? an-arity)
(assemble-listof-assembled-values
(map
(lambda: ([atomic-arity : (U Natural ArityAtLeast)])
(cond
[(natural? atomic-arity)
(number->string atomic-arity)]
[(ArityAtLeast? atomic-arity)
(format "(RT.makeArityAtLeast(~a))"
(ArityAtLeast-value atomic-arity))]))
an-arity))]))
(: assemble-jump (OpArg Blockht -> String))
(define (assemble-jump target blockht)
(define (default)
(format "return(~a)(M);" (assemble-oparg target blockht)))
;; Optimization: if the target of the jump goes to a block whose
;; only body is a si-context-expected_1, then jump directly to that code.
(cond
[(Label? target)
(define target-block (hash-ref blockht (Label-name target)))
(cond
[(block-looks-like-context-expected-values? target-block)
=>
(lambda (expected)
(format "RT.si_context_expected(~a)(M);\n" expected))]
[else
(default)])]
[else
(default)]))
(: block-looks-like-context-expected-values? (BasicBlock -> (U Natural False)))
(define (block-looks-like-context-expected-values? a-block)
(match (BasicBlock-stmts a-block)
[(list (struct PerformStatement ((struct RaiseContextExpectedValuesError! (expected))))
stmts ...)
expected]
[else
#f]))
(: block-looks-like-pop-multiple-values-and-continue? (BasicBlock -> (U False)))
(define (block-looks-like-pop-multiple-values-and-continue? a-block)
;; FIXME!
#f)
(: assemble-display-name ((U Symbol LamPositionalName) -> String))
(define (assemble-display-name name)
(cond
[(symbol? name)
(format "~s" (symbol->string name))]
[(LamPositionalName? name)
;; FIXME: record more interesting information here.
(format "~s" (symbol->string (LamPositionalName-name name)))]))
(: assemble-location ((U Reg Label) Blockht -> String))
(define (assemble-location a-location blockht)
(cond
[(Reg? a-location)
(assemble-reg a-location)]
[(Label? a-location)
(assemble-label a-location blockht)]))
(: assemble-primitive-kernel-value (PrimitiveKernelValue -> String))
(define (assemble-primitive-kernel-value a-prim)
(format "M.primitives[~s]" (symbol->string (PrimitiveKernelValue-id a-prim))))
(: assemble-module-entry (ModuleEntry -> String))
(define (assemble-module-entry entry)
(format "M.modules[~s].label"
(symbol->string (ModuleLocator-name (ModuleEntry-name entry)))))
(: assemble-is-module-invoked (IsModuleInvoked -> String))
(define (assemble-is-module-invoked entry)
(format "M.modules[~s].isInvoked"
(symbol->string (ModuleLocator-name (IsModuleInvoked-name entry)))))
(: assemble-is-module-linked (IsModuleLinked -> String))
(define (assemble-is-module-linked entry)
(format "(M.modules[~s]!==undefined)"
(symbol->string (ModuleLocator-name (IsModuleLinked-name entry)))))
(: assemble-variable-reference (VariableReference -> String))
(define (assemble-variable-reference varref)
(let ([t (VariableReference-toplevel varref)])
(format "(new RT.VariableReference(M.e[M.e.length-~a],~a))"
(add1 (ToplevelRef-depth t))
(ToplevelRef-pos t))))