5251 lines
188 KiB
Scheme
5251 lines
188 KiB
Scheme
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;;; 9.0: * calls (gensym <symbol>) instead of
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;;; (gensym (symbol->string <symbol>)) in order to avoid incrementing
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;;; gensym-count.
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;;; 6.7: * open-coded top-level-value, car, cdr
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;;; 6.2: * side-effects now modify the dirty-vector
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;;; * added bwp-object?
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;;; * added pointer-value
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;;; * added tcbuckets
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;;; 6.1: * added case-lambda, dropped lambda
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;;; 6.0: * basic compiler
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(let ()
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(define-syntax record-case
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(lambda (x)
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(define (enumerate fld* i)
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(syntax-case fld* ()
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[() #'()]
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[(x . x*)
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(with-syntax ([i i] [i* (enumerate #'x* (fx+ i 1))])
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#'(i . i*))]))
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(define (generate-body ctxt cls*)
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(syntax-case cls* (else)
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[() (with-syntax ([x x]) #'(error #f "unmatched ~s in ~s" v #'x))]
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[([else b b* ...]) #'(begin b b* ...)]
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[([(rec-name rec-field* ...) b b* ...] . rest) (identifier? #'rec-name)
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(with-syntax ([altern (generate-body ctxt #'rest)]
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[(id* ...) (enumerate #'(rec-field* ...) 0)]
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[rtd #'(type-descriptor rec-name)])
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#'(if ($record/rtd? v rtd)
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(let ([rec-field* ($record-ref v id*)] ...)
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b b* ...)
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altern))]))
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(syntax-case x ()
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[(_ expr cls* ...)
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(with-syntax ([body (generate-body #'_ #'(cls* ...))])
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#'(let ([v expr]) body))])))
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(include "set-operations.ss")
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(define open-coded-primitives
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;;; these primitives, when found in operator position with the correct
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;;; number of arguments, will be open-coded by the generator. If an
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;;; incorrect number of args is detected, or if they appear in non-operator
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;;; position, then they cannot be open-coded, and the pcb-primitives table
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;;; is consulted for a reference of the pcb slot containing the primitive.
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;;; If it's not found there, an error is signalled.
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;;;
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;;; prim-name args
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'([$constant-ref 1 value]
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[$constant-set! 2 effect]
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[$pcb-ref 1 value]
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[$pcb-set! 2 effect]
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;;; type predicates
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[fixnum? 1 pred]
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[immediate? 1 pred]
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[boolean? 1 pred]
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[char? 1 pred]
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[pair? 1 pred]
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[symbol? 1 pred]
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[vector? 1 pred]
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[string? 1 pred]
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[procedure? 1 pred]
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[null? 1 pred]
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[eof-object? 1 pred]
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[bwp-object? 1 pred]
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[$unbound-object? 1 pred]
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[$forward-ptr? 1 pred]
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[not 1 pred]
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[pointer-value 1 value]
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[eq? 2 pred]
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;;; fixnum primitives
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[$fxadd1 1 value]
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[$fxsub1 1 value]
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[$fx+ 2 value]
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[$fx- 2 value]
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[$fx* 2 value]
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[$fxsll 2 value]
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[$fxsra 2 value]
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[$fxlogand 2 value]
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[$fxlogor 2 value]
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[$fxlogxor 2 value]
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[$fxlognot 1 value]
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[$fxquotient 2 value]
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[$fxmodulo 2 value]
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;;; fixnum predicates
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[$fxzero? 1 pred]
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[$fx= 2 pred]
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[$fx< 2 pred]
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[$fx<= 2 pred]
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[$fx> 2 pred]
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[$fx>= 2 pred]
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;;; character predicates
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[$char= 2 pred]
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[$char< 2 pred]
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[$char<= 2 pred]
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[$char> 2 pred]
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[$char>= 2 pred]
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;;; character conversion
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[$fixnum->char 1 value]
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[$char->fixnum 1 value]
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;;; lists/pairs
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[cons 2 value]
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[list* positive value]
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[list any value]
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[car 1 value]
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[cdr 1 value]
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[$car 1 value]
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[$cdr 1 value]
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[$set-car! 2 effect]
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[$set-cdr! 2 effect]
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;;; vectors
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[$make-vector 1 value]
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[vector any value]
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[$vector-length 1 value]
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[$vector-ref 2 value]
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[$vector-set! 3 effect]
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;;; strings
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[$make-string 1 value]
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[$string any value]
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[$string-length 1 value]
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[$string-ref 2 value]
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[$string-set! 3 effect]
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;;; symbols
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[$make-symbol 1 value]
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[$symbol-value 1 value]
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[$symbol-string 1 value]
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[$symbol-unique-string 1 value]
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[$set-symbol-value! 2 effect]
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[$set-symbol-string! 2 effect]
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[$set-symbol-unique-string! 2 effect]
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[$symbol-plist 1 value]
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[$set-symbol-plist! 2 effect]
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[primitive-ref 1 value]
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[primitive-set! 2 effect]
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[top-level-value 1 value]
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;;; ports
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[port? 1 pred]
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[input-port? 1 pred]
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[output-port? 1 pred]
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[$make-port/input 7 value]
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[$make-port/output 7 value]
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[$make-port/both 7 value]
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[$port-handler 1 value]
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[$port-input-buffer 1 value]
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[$port-input-index 1 value]
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[$port-input-size 1 value]
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[$port-output-buffer 1 value]
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[$port-output-index 1 value]
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[$port-output-size 1 value]
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[$set-port-input-index! 2 effect]
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[$set-port-input-size! 2 effect]
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[$set-port-output-index! 2 effect]
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[$set-port-output-size! 2 effect]
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;;; tcbuckets
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[$make-tcbucket 4 value]
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[$tcbucket-key 1 value]
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[$tcbucket-val 1 value]
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[$tcbucket-next 1 value]
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[$set-tcbucket-val! 2 effect]
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[$set-tcbucket-next! 2 effect]
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[$set-tcbucket-tconc! 2 effect]
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;;; misc
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[eof-object 0 value]
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[void 0 value]
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[$exit 1 effect]
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[$fp-at-base 0 pred]
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[$current-frame 0 value]
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[$arg-list 0 value]
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[$seal-frame-and-call 1 tail]
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[$frame->continuation 1 value]
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[$interrupted? 0 pred]
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[$unset-interrupted! 0 effect]
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;;;
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;;; records
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;;;
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[$make-record 2 value]
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[$record? 1 pred]
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[$record/rtd? 2 pred]
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[$record-rtd 1 value]
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[$record-ref 2 value]
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[$record-set! 3 effect]
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[$record any value]
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;;;
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;;; asm
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;;;
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[$code? 1 pred]
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[$code-size 1 value]
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[$code-reloc-vector 1 value]
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[$code-freevars 1 value]
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[$code-ref 2 value]
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[$code-set! 3 value]
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[$code->closure 1 value]
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[$closure-code 1 value]
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;;;
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[$make-call-with-values-procedure 0 value]
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[$make-values-procedure 0 value]
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))
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(define (primitive-context x)
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(cond
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[(assq x open-coded-primitives) => caddr]
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[else (error 'primitive-context "unknown prim ~s" x)]))
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(define (open-codeable? x)
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(cond
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[(assq x open-coded-primitives) #t]
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[else #f]))
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(define (open-coded-primitive-args x)
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(cond
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[(assq x open-coded-primitives) => cadr]
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[else (error 'open-coded-primitive-args "invalid ~s" x)]))
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;;; end of primitives table section
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(define-record constant (value))
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(define-record code-loc (label))
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(define-record foreign-label (label))
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(define-record var
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(name assigned referenced
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reg-conf frm-conf var-conf reg-move frm-move var-move
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loc))
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(define-record cp-var (idx))
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(define-record frame-var (idx))
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(define-record new-frame (base-idx size body))
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(define-record save-cp (loc))
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(define-record eval-cp (check body))
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(define-record return (value))
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(define-record call-cp
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(call-convention label save-cp? rp-convention base-idx arg-count live-mask))
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(define-record tailcall-cp (convention label arg-count))
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(define-record primcall (op arg*))
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(define-record primref (name))
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(define-record conditional (test conseq altern))
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(define-record interrupt-call (test handler))
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(define-record bind (lhs* rhs* body))
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(define-record recbind (lhs* rhs* body))
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(define-record fix (lhs* rhs* body))
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(define-record seq (e0 e1))
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(define-record case-info (label args proper))
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(define-record clambda-case (info body))
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(define-record clambda (label cases free))
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(define-record closure (code free*))
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(define-record funcall (op rand*))
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(define-record jmpcall (label op rand*))
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(define-record forcall (op rand*))
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(define-record codes (list body))
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(define-record assign (lhs rhs))
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(define-record mvcall (producer consumer))
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(define-record shortcut^ (test body handler))
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(define-record shortcut (body handler))
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(define-record fvar (idx))
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(define-record object (val))
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(define-record locals (vars body))
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(define-record nframe (vars live body))
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(define-record nfv (conf loc var-conf frm-conf nfv-conf))
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(define-record ntcall (target value args mask size))
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(define-record asm-instr (op dst src))
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(define-record disp (s0 s1))
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(define mkfvar
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(let ([cache '()])
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(lambda (i)
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(cond
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[(fixnum? i)
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(cond
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[(assv i cache) => cdr]
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[else
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(let ([fv (make-fvar i)])
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(set! cache (cons (cons i fv) cache))
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fv)])]
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[else (error 'mkfvar "~s is not a fixnum" i)]))))
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(define (unique-var x)
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(make-var (gensym x) #f #f #f #f #f #f #f #f #f))
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(define (recordize x)
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(define *cookie* (gensym))
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(define (gen-fml* fml*)
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(cond
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[(pair? fml*)
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(let ([v (unique-var (car fml*))])
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(putprop (car fml*) *cookie* v)
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(cons v (gen-fml* (cdr fml*))))]
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[(symbol? fml*)
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(let ([v (unique-var fml*)])
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(putprop fml* *cookie* v)
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v)]
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[else '()]))
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(define (ungen-fml* fml*)
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(cond
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[(pair? fml*)
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(remprop (car fml*) *cookie*)
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(ungen-fml* (cdr fml*))]
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[(symbol? fml*)
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(remprop fml* *cookie*)]))
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(define (properize fml*)
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(cond
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[(pair? fml*)
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(cons (car fml*) (properize (cdr fml*)))]
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[(null? fml*) '()]
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[else (list fml*)]))
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(define (quoted-sym x)
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(if (and (list? x)
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(fx= (length x) 2)
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(eq? 'quote (car x))
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(symbol? (cadr x)))
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(cadr x)
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(error 'quoted-sym "not a quoted symbol ~s" x)))
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(define (quoted-string x)
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(if (and (list? x)
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(fx= (length x) 2)
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(eq? 'quote (car x))
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(string? (cadr x)))
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(cadr x)
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(error 'quoted-string "not a quoted string ~s" x)))
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(define (Var x)
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(or (getprop x *cookie*)
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(error 'recordize "unbound ~s" x)))
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(define (E x)
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(cond
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[(pair? x)
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(case (car x)
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[(quote) (make-constant (cadr x))]
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[(if)
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(make-conditional
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(E (cadr x))
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(E (caddr x))
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(E (cadddr x)))]
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[(set!)
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(let ([lhs (cadr x)] [rhs (caddr x)])
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(make-assign (Var lhs) (E rhs)))]
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[(begin)
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(let f ([a (E (cadr x))] [d (cddr x)])
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(cond
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[(null? d) a]
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[else
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(f (make-seq a (E (car d))) (cdr d))]))]
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[(letrec)
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(let ([bind* (cadr x)] [body (caddr x)])
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(let ([lhs* (map car bind*)]
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[rhs* (map cadr bind*)])
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(let ([nlhs* (gen-fml* lhs*)])
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(let ([expr (make-recbind nlhs* (map E rhs*) (E body ))])
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(ungen-fml* lhs*)
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expr))))]
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[(case-lambda)
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(let ([cls*
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(map
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(lambda (cls)
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(let ([fml* (car cls)] [body (cadr cls)])
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(let ([nfml* (gen-fml* fml*)])
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(let ([body (E body)])
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(ungen-fml* fml*)
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(make-clambda-case
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(make-case-info
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(gensym)
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(properize nfml*)
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(list? fml*))
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body)))))
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(cdr x))])
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(make-clambda (gensym) cls* #f))]
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[(foreign-call)
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(let ([name (quoted-string (cadr x))] [arg* (cddr x)])
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(make-forcall name (map E arg*)))]
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[(|#primitive|)
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(let ([var (cadr x)])
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(make-primref var))]
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[(top-level-value)
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(let ([var (quoted-sym (cadr x))])
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(if (eq? (expand-mode) 'bootstrap)
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(error 'compile "reference to ~s in bootstrap mode" var)
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(make-funcall
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(make-primref 'top-level-value)
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(list (make-constant var)))))]
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[(set-top-level-value!)
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(make-funcall (make-primref 'set-top-level-value!)
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(map E (cdr x)))]
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[(void)
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(make-constant (void))]
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[else
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(make-funcall (E (car x)) (map E (cdr x)))])]
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[(symbol? x) (Var x)]
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[else (error 'recordize "invalid expression ~s" x)]))
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(E x))
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(define (unparse x)
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(define (E-args proper x)
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(if proper
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(map E x)
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(let f ([a (car x)] [d (cdr x)])
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(cond
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[(null? d) (E a)]
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[else (cons (E a) (f (car d) (cdr d)))]))))
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(define (E x)
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(record-case x
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[(constant c) `(quote ,c)]
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[(code-loc x) `(code-loc ,x)]
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[(var x) (string->symbol (format "v:~a" x))]
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[(primref x) x]
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[(conditional test conseq altern)
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`(if ,(E test) ,(E conseq) ,(E altern))]
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[(interrupt-call e0 e1)
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`(interrupt-call ,(E e0) ,(E e1))]
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[(primcall op arg*) `(,op . ,(map E arg*))]
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[(bind lhs* rhs* body)
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`(let ,(map (lambda (lhs rhs) (list (E lhs) (E rhs))) lhs* rhs*)
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,(E body))]
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[(recbind lhs* rhs* body)
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`(letrec ,(map (lambda (lhs rhs) (list (E lhs) (E rhs))) lhs* rhs*)
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,(E body))]
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[(fix lhs* rhs* body)
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`(fix ,(map (lambda (lhs rhs) (list (E lhs) (E rhs))) lhs* rhs*)
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,(E body))]
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[(seq e0 e1)
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(let ()
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(define (f x ac)
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(record-case x
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[(seq e0 e1) (f e0 (f e1 ac))]
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[else (cons (E x) ac)]))
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(cons 'begin (f e0 (f e1 '()))))]
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[(clambda-case info body)
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`(,(E-args (case-info-proper info)
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(case-info-args info))
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,(E body))]
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[(clambda g cls* free)
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`(,g (case-lambda . ,(map E cls*)))]
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[(clambda label clauses free)
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`(code ,label . ,(map E clauses))]
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[(closure code free*)
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`(closure ,(E code) ,(map E free*))]
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[(codes list body)
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`(codes ,(map E list)
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,(E body))]
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[(funcall rator rand*) `(funcall ,(E rator) . ,(map E rand*))]
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[(jmpcall label rator rand*)
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`(jmpcall ,label ,(E rator) . ,(map E rand*))]
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[(forcall rator rand*) `(foreign-call ,rator . ,(map E rand*))]
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[(assign lhs rhs) `(set! ,(E lhs) ,(E rhs))]
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[(return x) `(return ,(E x))]
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[(new-frame base-idx size body)
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`(new-frame [base: ,base-idx]
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[size: ,size]
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,(E body))]
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[(frame-var idx)
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(string->symbol (format "fv.~a" idx))]
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[(cp-var idx)
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(string->symbol (format "cp.~a" idx))]
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[(save-cp expr)
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`(save-cp ,(E expr))]
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[(eval-cp check body)
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`(eval-cp ,check ,(E body))]
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[(call-cp call-convention label save-cp? rp-convention base-idx arg-count live-mask)
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`(call-cp [conv: ,call-convention]
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[label: ,label]
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[rpconv: ,(if (symbol? rp-convention)
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rp-convention
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(E rp-convention))]
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[base-idx: ,base-idx]
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[arg-count: ,arg-count]
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[live-mask: ,live-mask])]
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[(tailcall-cp convention label arg-count)
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`(tailcall-cp ,convention ,label ,arg-count)]
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[(foreign-label x) `(foreign-label ,x)]
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[(mvcall prod cons) `(mvcall ,(E prod) ,(E cons))]
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[(fvar idx) (string->symbol (format "fv.~a" idx))]
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[(nfv idx) 'nfv]
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[(locals vars body) `(locals ,(map E vars) ,(E body))]
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[(asm-instr op d s)
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`(asm ,op ,(E d) ,(E s))]
|
|
[(disp s0 s1)
|
|
`(disp ,(E s0) ,(E s1))]
|
|
[(nframe vars live body) `(nframe ;[vars: ,(map E vars)]
|
|
;[live: ,(map E live)]
|
|
,(E body))]
|
|
[(shortcut^ pred body handler)
|
|
`(shortcut ,(E pred) ,(E body) ,(E handler))]
|
|
[(shortcut body handler)
|
|
`(exceptional ,(E body) ,(E handler))]
|
|
[else
|
|
(if (symbol? x)
|
|
x
|
|
"#<unknown>")]))
|
|
(E x))
|
|
|
|
(define open-mvcalls (make-parameter #t))
|
|
|
|
(define (optimize-direct-calls x)
|
|
(define who 'optimize-direct-calls)
|
|
(define (make-conses ls)
|
|
(cond
|
|
[(null? ls) (make-constant '())]
|
|
[else
|
|
(make-primcall 'cons
|
|
(list (car ls) (make-conses (cdr ls))))]))
|
|
(define (properize lhs* rhs*)
|
|
(cond
|
|
[(null? lhs*) (error who "improper improper")]
|
|
[(null? (cdr lhs*))
|
|
(list (make-conses rhs*))]
|
|
[else (cons (car rhs*) (properize (cdr lhs*) (cdr rhs*)))]))
|
|
(define (inline-case cls rand*)
|
|
(record-case cls
|
|
[(clambda-case info body)
|
|
(record-case info
|
|
[(case-info label fml* proper)
|
|
(if proper
|
|
(and (fx= (length fml*) (length rand*))
|
|
(make-bind fml* rand* body))
|
|
(and (fx<= (length fml*) (length rand*))
|
|
(make-bind fml* (properize fml* rand*) body)))])]))
|
|
(define (try-inline cls* rand* default)
|
|
(cond
|
|
[(null? cls*) default]
|
|
[(inline-case (car cls*) rand*)]
|
|
[else (try-inline (cdr cls*) rand* default)]))
|
|
(define (inline rator rand*)
|
|
(define (valid-mv-consumer? x)
|
|
(record-case x
|
|
[(clambda L cases F)
|
|
(and (fx= (length cases) 1)
|
|
(record-case (car cases)
|
|
[(clambda-case info body)
|
|
(record-case info
|
|
[(case-info L args proper) proper])]))]
|
|
[else #f]))
|
|
(define (single-value-consumer? x)
|
|
(record-case x
|
|
[(clambda L cases F)
|
|
(and (fx= (length cases) 1)
|
|
(record-case (car cases)
|
|
[(clambda-case info body)
|
|
(record-case info
|
|
[(case-info L args proper)
|
|
(and proper (fx= (length args) 1))])]))]
|
|
[else #f]))
|
|
(define (valid-mv-producer? x)
|
|
(record-case x
|
|
[(funcall) #t]
|
|
[(conditional) #f]
|
|
[(bind lhs* rhs* body) (valid-mv-producer? body)]
|
|
[else (error 'valid-mv-producer? "unhandles ~s"
|
|
(unparse x))]))
|
|
(record-case rator
|
|
[(clambda g cls*)
|
|
(try-inline cls* rand*
|
|
(make-funcall rator rand*))]
|
|
[(primref op)
|
|
(case op
|
|
;;; FIXME HERE
|
|
[(call-with-values)
|
|
(cond
|
|
[(and (open-mvcalls) (fx= (length rand*) 2))
|
|
(let ([producer (inline (car rand*) '())]
|
|
[consumer (cadr rand*)])
|
|
(cond
|
|
[(single-value-consumer? consumer)
|
|
(inline consumer (list producer))]
|
|
[(and (valid-mv-consumer? consumer)
|
|
(valid-mv-producer? producer))
|
|
(make-mvcall producer consumer)]
|
|
[else
|
|
(make-funcall rator rand*)]))]
|
|
[else
|
|
(make-funcall rator rand*)])]
|
|
[else
|
|
(make-funcall rator rand*)])]
|
|
[else (make-funcall rator rand*)]))
|
|
(define (Expr x)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var) x]
|
|
[(primref) x]
|
|
[(bind lhs* rhs* body)
|
|
(make-bind lhs* (map Expr rhs*) (Expr body))]
|
|
[(recbind lhs* rhs* body)
|
|
(make-recbind lhs* (map Expr rhs*) (Expr body))]
|
|
[(conditional test conseq altern)
|
|
(make-conditional
|
|
(Expr test)
|
|
(Expr conseq)
|
|
(Expr altern))]
|
|
[(seq e0 e1)
|
|
(make-seq (Expr e0) (Expr e1))]
|
|
[(clambda g cls*)
|
|
(make-clambda g
|
|
(map (lambda (x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(make-clambda-case info (Expr body))]))
|
|
cls*)
|
|
#f)]
|
|
[(primcall rator rand*)
|
|
(make-primcall rator (map Expr rand*))]
|
|
[(funcall rator rand*)
|
|
(inline (Expr rator) (map Expr rand*))]
|
|
[(forcall rator rand*)
|
|
(make-forcall rator (map Expr rand*))]
|
|
[(assign lhs rhs)
|
|
(make-assign lhs (Expr rhs))]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(Expr x))
|
|
|
|
(define lambda-both 0)
|
|
(define lambda-producer 0)
|
|
(define lambda-consumer 0)
|
|
(define lambda-none 0)
|
|
(define branching-producer 0)
|
|
|
|
(define (analyze-cwv x)
|
|
(define who 'analyze-cwv)
|
|
(define (lambda? x)
|
|
(record-case x
|
|
[(clambda) #t]
|
|
[else #f]))
|
|
(define (branching-producer? x)
|
|
(define (bt? x)
|
|
(record-case x
|
|
[(bind lhs* rhs* body) (bt? body)]
|
|
[(recbind lhs* rhs* body) (bt? body)]
|
|
[(conditional test conseq altern) #t]
|
|
[(seq e0 e1) (bt? e1)]
|
|
[else #f]))
|
|
(define (branching-clause? x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(bt? body)]))
|
|
(record-case x
|
|
[(clambda g cls*)
|
|
(ormap branching-clause? cls*)]
|
|
[else #f]))
|
|
(define (analyze producer consumer)
|
|
(cond
|
|
[(and (lambda? producer) (lambda? consumer))
|
|
(set! lambda-both (fxadd1 lambda-both))]
|
|
[(lambda? producer)
|
|
(set! lambda-producer (fxadd1 lambda-producer))]
|
|
[(lambda? consumer)
|
|
(set! lambda-consumer (fxadd1 lambda-consumer))]
|
|
[else
|
|
(set! lambda-none (fxadd1 lambda-none))])
|
|
(when (branching-producer? producer)
|
|
(set! branching-producer (fxadd1 branching-producer)))
|
|
(printf "both=~s p=~s c=~s none=~s branching-prod=~s\n"
|
|
lambda-both lambda-producer lambda-consumer lambda-none
|
|
branching-producer))
|
|
(define (E x)
|
|
(record-case x
|
|
[(constant) (void)]
|
|
[(var) (void)]
|
|
[(primref) (void)]
|
|
[(bind lhs* rhs* body)
|
|
(for-each E rhs*) (E body)]
|
|
[(recbind lhs* rhs* body)
|
|
(for-each E rhs*) (E body)]
|
|
[(conditional test conseq altern)
|
|
(E test)
|
|
(E conseq)
|
|
(E altern)]
|
|
[(seq e0 e1) (E e0) (E e1)]
|
|
[(clambda g cls*)
|
|
(for-each
|
|
(lambda (x)
|
|
(record-case x
|
|
[(clambda-case info body) (E body)]))
|
|
cls*)]
|
|
[(primcall rator rand*)
|
|
(for-each E rand*)
|
|
(when (and (eq? rator 'call-with-values) (fx= (length rand*) 2))
|
|
(analyze (car rand*) (cadr rand*)))]
|
|
[(funcall rator rand*)
|
|
(E rator) (for-each E rand*)
|
|
(when (and (record-case rator
|
|
[(primref op) (eq? op 'call-with-values)]
|
|
[else #f])
|
|
(fx= (length rand*) 2))
|
|
(analyze (car rand*) (cadr rand*)))]
|
|
[(forcall rator rand*)
|
|
(for-each E rand*)]
|
|
[(assign lhs rhs)
|
|
(E rhs)]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(E x))
|
|
|
|
(define (optimize-letrec x)
|
|
(define who 'optimize-letrec)
|
|
(define (extend-hash lhs* h ref)
|
|
(for-each (lambda (lhs) (put-hash-table! h lhs #t)) lhs*)
|
|
(lambda (x)
|
|
(unless (get-hash-table h x #f)
|
|
(put-hash-table! h x #t)
|
|
(ref x))))
|
|
(define (E* x* ref comp)
|
|
(cond
|
|
[(null? x*) '()]
|
|
[else
|
|
(cons (E (car x*) ref comp)
|
|
(E* (cdr x*) ref comp))]))
|
|
(define (do-rhs* i lhs* rhs* ref comp vref vcomp)
|
|
(cond
|
|
[(null? rhs*) '()]
|
|
[else
|
|
(let ([h (make-hash-table)])
|
|
(let ([ref
|
|
(lambda (x)
|
|
(unless (get-hash-table h x #f)
|
|
(put-hash-table! h x #t)
|
|
(ref x)
|
|
(when (memq x lhs*)
|
|
(vector-set! vref i #t))))]
|
|
[comp
|
|
(lambda ()
|
|
(vector-set! vcomp i #t)
|
|
(comp))])
|
|
(cons (E (car rhs*) ref comp)
|
|
(do-rhs* (fxadd1 i) lhs* (cdr rhs*) ref comp vref vcomp))))]))
|
|
(define (partition-rhs* i lhs* rhs* vref vcomp)
|
|
(cond
|
|
[(null? lhs*) (values '() '() '() '() '() '())]
|
|
[else
|
|
(let-values
|
|
([(slhs* srhs* llhs* lrhs* clhs* crhs*)
|
|
(partition-rhs* (fxadd1 i) (cdr lhs*) (cdr rhs*) vref vcomp)]
|
|
[(lhs rhs) (values (car lhs*) (car rhs*))])
|
|
(cond
|
|
[(var-assigned lhs)
|
|
(values slhs* srhs* llhs* lrhs* (cons lhs clhs*) (cons rhs crhs*))]
|
|
[(clambda? rhs)
|
|
(values slhs* srhs* (cons lhs llhs*) (cons rhs lrhs*) clhs* crhs*)]
|
|
[(or (vector-ref vref i) (vector-ref vcomp i))
|
|
(values slhs* srhs* llhs* lrhs* (cons lhs clhs*) (cons rhs crhs*))]
|
|
[else
|
|
(values (cons lhs slhs*) (cons rhs srhs*) llhs* lrhs* clhs* crhs*)]
|
|
))]))
|
|
(define (do-recbind lhs* rhs* body ref comp)
|
|
(let ([h (make-hash-table)]
|
|
[vref (make-vector (length lhs*) #f)]
|
|
[vcomp (make-vector (length lhs*) #f)])
|
|
(let* ([ref (extend-hash lhs* h ref)]
|
|
[body (E body ref comp)])
|
|
(let ([rhs* (do-rhs* 0 lhs* rhs* ref comp vref vcomp)])
|
|
(let-values ([(slhs* srhs* llhs* lrhs* clhs* crhs*)
|
|
(partition-rhs* 0 lhs* rhs* vref vcomp)])
|
|
(let ([v* (map (lambda (x) (make-primcall 'void '())) clhs*)]
|
|
[t* (map (lambda (x) (unique-var 'tmp)) clhs*)])
|
|
(make-bind slhs* srhs*
|
|
(make-bind clhs* v*
|
|
(make-fix llhs* lrhs*
|
|
(make-bind t* crhs*
|
|
(build-assign* clhs* t* body)))))))))))
|
|
(define (build-assign* lhs* rhs* body)
|
|
(cond
|
|
[(null? lhs*) body]
|
|
[else
|
|
(make-seq
|
|
(make-assign (car lhs*) (car rhs*))
|
|
(build-assign* (cdr lhs*) (cdr rhs*) body))]))
|
|
(define (E x ref comp)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var) (ref x) x]
|
|
[(assign lhs rhs)
|
|
(set-var-assigned! lhs #t)
|
|
(ref lhs)
|
|
(make-assign lhs (E rhs ref comp))]
|
|
[(primref) x]
|
|
[(bind lhs* rhs* body)
|
|
(let ([rhs* (E* rhs* ref comp)])
|
|
(let ([h (make-hash-table)])
|
|
(let ([body (E body (extend-hash lhs* h ref) comp)])
|
|
(make-bind lhs* rhs* body))))]
|
|
[(recbind lhs* rhs* body)
|
|
(if (null? lhs*)
|
|
(E body ref comp)
|
|
(do-recbind lhs* rhs* body ref comp))]
|
|
[(conditional e0 e1 e2)
|
|
(make-conditional (E e0 ref comp) (E e1 ref comp) (E e2 ref comp))]
|
|
[(seq e0 e1) (make-seq (E e0 ref comp) (E e1 ref comp))]
|
|
[(clambda g cls*)
|
|
(make-clambda g
|
|
(map (lambda (x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(let ([h (make-hash-table)])
|
|
(let ([body (E body (extend-hash (case-info-args info) h ref) void)])
|
|
(make-clambda-case info body)))]))
|
|
cls*)
|
|
#f)]
|
|
[(primcall rator rand*)
|
|
(when (memq rator '(call/cc call/cf))
|
|
(comp))
|
|
(make-primcall rator (E* rand* ref comp))]
|
|
[(funcall rator rand*)
|
|
(let ([rator (E rator ref comp)] [rand* (E* rand* ref comp)])
|
|
(record-case rator
|
|
[(primref op)
|
|
(when (memq op '(call/cc call/cf))
|
|
(comp))]
|
|
[else
|
|
(comp)])
|
|
(make-funcall rator rand*))]
|
|
[(mvcall p c)
|
|
(let ([p (E p ref comp)] [c (E c ref comp)])
|
|
(comp)
|
|
(make-mvcall p c))]
|
|
[(forcall rator rand*)
|
|
(make-forcall rator (E* rand* ref comp))]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(E x (lambda (x) (error who "free var ~s found" x))
|
|
void))
|
|
|
|
;;; This pass was here before optimize-letrec was implemented.
|
|
(define (remove-letrec x)
|
|
(define who 'remove-letrec)
|
|
(define (Expr x)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var) x]
|
|
[(primref) x]
|
|
[(bind lhs* rhs* body)
|
|
(make-bind lhs* (map Expr rhs*) (Expr body))]
|
|
[(recbind lhs* rhs* body)
|
|
(let ([t* (map (lambda (lhs) (unique-var 'tmp)) lhs*)]
|
|
[v* (map (lambda (lhs) (make-primcall 'void '())) lhs*)])
|
|
(make-bind lhs* v*
|
|
(make-bind t* (map Expr rhs*)
|
|
(let f ([lhs* lhs*] [t* t*])
|
|
(cond
|
|
[(null? lhs*) (Expr body)]
|
|
[else
|
|
(make-seq
|
|
(make-assign (car lhs*) (car t*))
|
|
(f (cdr lhs*) (cdr t*)))])))))]
|
|
;[(fix lhs* rhs* body)
|
|
; (Expr (make-recbind lhs* rhs* body))]
|
|
[(fix lhs* rhs* body)
|
|
(make-fix lhs* (map Expr rhs*) (Expr body))]
|
|
[(conditional test conseq altern)
|
|
(make-conditional
|
|
(Expr test)
|
|
(Expr conseq)
|
|
(Expr altern))]
|
|
[(seq e0 e1)
|
|
(make-seq (Expr e0) (Expr e1))]
|
|
[(clambda g cls*)
|
|
(make-clambda g
|
|
(map (lambda (x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(make-clambda-case info (Expr body))]))
|
|
cls*)
|
|
#f)]
|
|
[(primcall rator rand*)
|
|
(make-primcall rator (map Expr rand*))]
|
|
[(funcall rator rand*)
|
|
(make-funcall (Expr rator) (map Expr rand*))]
|
|
[(forcall rator rand*)
|
|
(make-forcall rator (map Expr rand*))]
|
|
[(assign lhs rhs)
|
|
(make-assign lhs (Expr rhs))]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(Expr x))
|
|
|
|
(define (uncover-assigned/referenced x)
|
|
(define who 'uncover-assigned/referenced)
|
|
(define (Expr* x*)
|
|
(for-each Expr x*))
|
|
(define (init-var x)
|
|
(set-var-assigned! x #f)
|
|
(set-var-referenced! x #f))
|
|
(define (Expr x)
|
|
(record-case x
|
|
[(constant) (void)]
|
|
[(var) (set-var-referenced! x #t)]
|
|
[(primref) (void)]
|
|
[(bind lhs* rhs* body)
|
|
(for-each init-var lhs*)
|
|
(begin (Expr body) (Expr* rhs*))]
|
|
[(fix lhs* rhs* body)
|
|
(for-each init-var lhs*)
|
|
(Expr* rhs*)
|
|
(Expr body)
|
|
(when (ormap var-assigned lhs*)
|
|
(error who "a fix lhs is assigned"))]
|
|
[(conditional test conseq altern)
|
|
(begin (Expr test) (Expr conseq) (Expr altern))]
|
|
[(seq e0 e1) (begin (Expr e0) (Expr e1))]
|
|
[(clambda g cls*)
|
|
(for-each
|
|
(lambda (cls)
|
|
(record-case cls
|
|
[(clambda-case info body)
|
|
(for-each init-var (case-info-args info))
|
|
(Expr body)]))
|
|
cls*)]
|
|
[(primcall rator rand*) (Expr* rand*)]
|
|
[(funcall rator rand*)
|
|
(begin (Expr rator) (Expr* rand*))]
|
|
[(mvcall p c) (begin (Expr p) (Expr c))]
|
|
[(forcall rator rand*) (Expr* rand*)]
|
|
[(assign lhs rhs)
|
|
(set-var-assigned! lhs #t)
|
|
(Expr rhs)]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(Expr x)
|
|
x)
|
|
|
|
(module (tally-giveup)
|
|
(define giveup-list '())
|
|
(define (tally-giveup op)
|
|
(cond
|
|
[(getprop op '*compiler-giveup-tally*) =>
|
|
(lambda (n)
|
|
(putprop op '*compiler-giveup-tally* (add1 n)))]
|
|
[else
|
|
(set! giveup-list (cons op giveup-list))
|
|
(putprop op '*compiler-giveup-tally* 1)]))
|
|
(define (print-tally)
|
|
(for-each
|
|
(lambda (x)
|
|
(let ([n (getprop x '*compiler-giveup-tally*)])
|
|
(when (>= n 30)
|
|
(printf "~s ~s\n" n x))))
|
|
giveup-list))
|
|
(primitive-set! 'compiler-giveup-tally print-tally))
|
|
|
|
#|FIXME:missing-optimizations
|
|
128 list*
|
|
111 cadr
|
|
464 $record/rtd?
|
|
404 memq
|
|
249 map
|
|
114 not
|
|
451 car
|
|
224 syntax-error
|
|
248 $syntax-dispatch
|
|
237 pair?
|
|
125 length
|
|
165 $cdr
|
|
137 $car
|
|
805 $record-ref
|
|
181 fixnum?
|
|
328 null?
|
|
136 fx-
|
|
207 eq?
|
|
153 call-with-values
|
|
165 values
|
|
336 apply
|
|
384 cdr
|
|
898 cons
|
|
747 error
|
|
331 primitive-set!
|
|
555 void
|
|
645 list
|
|
|#
|
|
|
|
(module (optimize-primcall)
|
|
(define (optimize-primcall ctxt op rand*)
|
|
(cond
|
|
[(getprop op *cookie*) =>
|
|
(lambda (proc)
|
|
(proc ctxt op rand*
|
|
(lambda ()
|
|
(make-funcall (make-primref op) rand*))))]
|
|
[else
|
|
(tally-giveup op)
|
|
(make-funcall (make-primref op) rand*)]))
|
|
(define (constant-value x k)
|
|
(record-case x
|
|
[(constant t) (k t)] ; known
|
|
[(bind lhs* rhs* body) (constant-value body k)]
|
|
[(fix lhs* rhs* body) (constant-value body k)]
|
|
[(seq e0 e1) (constant-value e1 k)]
|
|
[else #f]))
|
|
(define (mk-seq e0 e1) ;;; keep e1 seq-free.
|
|
(cond
|
|
[(and (primcall? e0) (eq? (primcall-op e0) 'void)) e1]
|
|
[(seq? e1)
|
|
(make-seq (make-seq e0 (seq-e0 e1)) (seq-e1 e1))]
|
|
[else
|
|
(make-seq e0 e1)]))
|
|
(define (equable? x)
|
|
(if (number? x) (fixnum? x) #t))
|
|
(define *cookie* (gensym "optimizer-cookie"))
|
|
(define-syntax set-cases
|
|
(syntax-rules ()
|
|
[(_ ctxt op rand* giveup
|
|
[(op** ...) b* b** ...] ...)
|
|
(begin
|
|
(let ([p (lambda (ctxt op rand* giveup) b* b** ...)])
|
|
(putprop 'op** *cookie* p) ...
|
|
(void)) ...)]))
|
|
(set-cases ctxt op rand* giveup
|
|
[(eq?)
|
|
(or (and (fx= (length rand*) 2)
|
|
(let ([a0 (car rand*)] [a1 (cadr rand*)])
|
|
(or
|
|
(constant-value a0
|
|
(lambda (x0)
|
|
(constant-value a1
|
|
(lambda (x1)
|
|
(mk-seq (mk-seq a0 a1)
|
|
(make-constant (eq? x0 x1)))))
|
|
(and (eq? ctxt 'e)
|
|
(mk-seq a0 a1)))))))
|
|
(giveup))]
|
|
[(eqv?)
|
|
(or (and (fx= (length rand*) 2)
|
|
(let ([a0 (car rand*)] [a1 (cadr rand*)])
|
|
(or
|
|
(constant-value a0
|
|
(lambda (x0)
|
|
(or (constant-value a1
|
|
(lambda (x1)
|
|
(mk-seq (mk-seq a0 a1)
|
|
(make-constant (eqv? x0 x1)))))
|
|
(and (equable? x0)
|
|
(optimize-primcall ctxt 'eq? rand*)))))
|
|
(constant-value a1
|
|
(lambda (x1)
|
|
(and (equable? x1)
|
|
(optimize-primcall ctxt 'eq? rand*))))
|
|
(and (eq? ctxt 'e)
|
|
(mk-seq a0 a1)))))
|
|
(giveup))]
|
|
[(memv)
|
|
(or (and (fx= (length rand*) 2)
|
|
(let ([a0 (car rand*)] [a1 (cadr rand*)])
|
|
(constant-value a1
|
|
(lambda (ls)
|
|
(cond
|
|
[(not (list? ls)) #f]
|
|
[(eq? ctxt 'e) (mk-seq a0 a1)]
|
|
[(constant-value a0
|
|
(lambda (x)
|
|
(mk-seq (mk-seq a0 a1)
|
|
(case ctxt
|
|
[(v) (make-constant (memv x ls))]
|
|
[else (make-constant
|
|
(if (memv x ls) #t #f))]))))]
|
|
[(andmap equable? ls)
|
|
(optimize-primcall ctxt 'memq rand*)]
|
|
[(fx= (length ls) 1)
|
|
(mk-seq a1
|
|
(optimize-primcall ctxt 'eqv?
|
|
(list a0 (make-constant (car ls)))))]
|
|
[else #f])))))
|
|
(giveup))]
|
|
[(memq)
|
|
(or (and (fx= (length rand*) 2)
|
|
(let ([a0 (car rand*)] [a1 (cadr rand*)])
|
|
(constant-value a1
|
|
(lambda (ls)
|
|
(cond
|
|
[(not (list? ls)) #f]
|
|
[(eq? ctxt 'e) (make-seq a0 a1)]
|
|
[(constant-value a0
|
|
(lambda (x)
|
|
(mk-seq (mk-seq a0 a1)
|
|
(case ctxt
|
|
[(v) (make-constant (memq x ls))]
|
|
[else (make-constant
|
|
(if (memq x ls) #t #f))]))))]
|
|
[(fx= (length ls) 1)
|
|
(mk-seq a1
|
|
(optimize-primcall ctxt 'eq?
|
|
(list a0 (make-constant (car ls)))))]
|
|
[else (make-primcall '$memq rand*)])))))
|
|
(giveup))]
|
|
[(list)
|
|
(case ctxt
|
|
[(v) (if (null? rand*) (make-constant '()) (giveup))]
|
|
[else
|
|
(if (null? rand*)
|
|
(make-constant #t)
|
|
(let f ([a (car rand*)] [d (cdr rand*)])
|
|
(cond
|
|
[(null? d) (make-seq a (make-constant #t))]
|
|
[else
|
|
(f (make-seq a (car d)) (cdr d))])))])]
|
|
[(list*)
|
|
(case ctxt
|
|
[(e)
|
|
(cond
|
|
[(null? rand*) (giveup)]
|
|
[else
|
|
(let f ([a (car rand*)] [d (cdr rand*)])
|
|
(cond
|
|
[(null? d) a]
|
|
[else (f (mk-seq a (car d)) (cdr d))]))])]
|
|
[(p)
|
|
(cond
|
|
[(null? rand*) (giveup)]
|
|
[(null? (cdr rand*))
|
|
(let ([a (car rand*)])
|
|
(or (constant-value a
|
|
(lambda (v)
|
|
(mk-seq a (make-constant (if v #t #f)))))
|
|
a))]
|
|
[else
|
|
(let f ([a (car rand*)] [d (cdr rand*)])
|
|
(cond
|
|
[(null? d) (mk-seq a (make-constant #t))]
|
|
[else (f (mk-seq a (car d)) (cdr d))]))])]
|
|
[else
|
|
(cond
|
|
[(null? rand*) (giveup)]
|
|
[(null? (cdr rand*)) (car rand*)]
|
|
[else (giveup)])])]
|
|
[(cons)
|
|
(or (and (fx= (length rand*) 2)
|
|
(let ([a0 (car rand*)] [a1 (cadr rand*)])
|
|
(case ctxt
|
|
[(e) (mk-seq a0 a1)]
|
|
[(p) (mk-seq (mk-seq a0 a1) (make-constant #t))]
|
|
[else (giveup)])))
|
|
(giveup))]
|
|
[($record-ref $record/rtd?)
|
|
(or (and (fx= (length rand*) 2)
|
|
(let ([a0 (car rand*)] [a1 (cadr rand*)])
|
|
(case ctxt
|
|
[(e) (mk-seq a0 a1)]
|
|
[else
|
|
(or (constant-value a1
|
|
(lambda (n1)
|
|
(mk-seq a1
|
|
(make-primcall op
|
|
(list a0 (make-constant n1))))))
|
|
(make-primcall op rand*))])))
|
|
(error 'optimize "~s rands to ~s" (map unparse rand*) op))]
|
|
[(void)
|
|
(or (and (null? rand*)
|
|
(case ctxt
|
|
[(p) (make-constant #t)]
|
|
[else (make-constant (void))]))
|
|
(giveup))]
|
|
[(car cdr)
|
|
(or (and (fx= (length rand*) 1)
|
|
(let ([a (car rand*)])
|
|
(constant-value a
|
|
(lambda (v)
|
|
(and (pair? v)
|
|
(mk-seq a
|
|
(make-constant
|
|
(case op
|
|
[(car) (car v)]
|
|
[else (cdr v)]))))))))
|
|
(giveup))]
|
|
[(cadr)
|
|
(or (and (fx= (length rand*) 1)
|
|
(let ([a (car rand*)])
|
|
(or (constant-value a
|
|
(lambda (v)
|
|
(and (pair? v)
|
|
(pair? (cdr v))
|
|
(mk-seq a
|
|
(make-constant
|
|
(cadr v))))))
|
|
(make-primcall op rand*))))
|
|
(giveup))]
|
|
[(not null? pair? fixnum? vector? string? char? symbol?
|
|
eof-object?)
|
|
(or (and (fx= (length rand*) 1)
|
|
(let ([a (car rand*)])
|
|
(case ctxt
|
|
[(e) a]
|
|
[else
|
|
(or (constant-value a
|
|
(lambda (v)
|
|
(mk-seq a
|
|
(make-constant
|
|
(case op
|
|
[(not) (not v)]
|
|
[(null?) (null? v)]
|
|
[(pair?) (pair? v)]
|
|
[(fixnum?) (fixnum? v)]
|
|
[(vector?) (vector? v)]
|
|
[(string?) (string? v)]
|
|
[(char?) (char? v)]
|
|
[(symbol?) (symbol? v)]
|
|
[(eof-object?) (eof-object? v)]
|
|
[else
|
|
(error 'optimize
|
|
"huh ~s" op)])))))
|
|
(make-primcall op rand*))])))
|
|
(giveup))]
|
|
[($car $cdr)
|
|
(or (and (fx= (length rand*) 1)
|
|
(let ([a (car rand*)])
|
|
(or (constant-value a
|
|
(lambda (v)
|
|
(if (pair? v)
|
|
(make-seq a
|
|
(make-constant
|
|
(case op
|
|
[($car) (car v)]
|
|
[else (cdr v)])))
|
|
(error 'optimize
|
|
"incorrect arg ~s to ~s"
|
|
v op))))
|
|
(giveup))))
|
|
(error 'optimize "incorrect args ~s to ~s"
|
|
(map unparse rand*) op))]
|
|
[(fxadd1 fxsub1)
|
|
(or (and (fx= (length rand*) 1)
|
|
(let ([a (car rand*)])
|
|
(or (constant-value a
|
|
(lambda (v)
|
|
(and (fixnum? v)
|
|
(let ([t
|
|
(case op
|
|
[(fxadd1) (add1 v)]
|
|
[else (sub1 v)])])
|
|
(and (fixnum? t)
|
|
(mk-seq a
|
|
(make-constant t)))))))
|
|
(make-primcall op rand*))))
|
|
(giveup))]
|
|
[(fx+)
|
|
(or (and (fx= (length rand*) 2)
|
|
(let ([a0 (car rand*)] [a1 (cadr rand*)])
|
|
(or (constant-value a1
|
|
(lambda (v1)
|
|
(and (fixnum? v1)
|
|
(or (constant-value a0
|
|
(lambda (v0)
|
|
(and (fixnum? v0)
|
|
(let ([r (+ v0 v1)])
|
|
(and (fixnum? r)
|
|
(mk-seq (mk-seq a0 a1)
|
|
(make-constant r)))))))
|
|
(mk-seq a1
|
|
(make-primcall op
|
|
(list a0 (make-constant v1))))))))
|
|
(constant-value a0
|
|
(lambda (v0)
|
|
(and (fixnum? v0)
|
|
(mk-seq a0
|
|
(make-primcall op
|
|
(list (make-constant v0) a1))))))
|
|
(make-primcall op rand*))))
|
|
(giveup))]
|
|
;X; [(fx- fx+ fx*)
|
|
;X; (or (and (fx= (length rand*) 2)
|
|
;X; (let ([a0 (car rand*)] [a1 (cadr rand*)])
|
|
;X; (or (constant-value a1
|
|
;X; (lambda (v1)
|
|
;X; (and (fixnum? v1)
|
|
;X; (or (constant-value a0
|
|
;X; (lambda (v0)
|
|
;X; (and (fixnum? v0)
|
|
;X; (let ([r (case op
|
|
;X; [(fx+) (+ v0 v1)]
|
|
;X; [(fx-) (- v0 v1)]
|
|
;X; [(fx*) (* v0 v1)]
|
|
;X; [else (error 'compile "BOO")])])
|
|
;X; (and (fixnum? r)
|
|
;X; (mk-seq (mk-seq a0 a1)
|
|
;X; (make-constant r)))))))
|
|
;X; (mk-seq a1 (make-primcall op (list a0 v1)))))))
|
|
;X; (constant-value a0
|
|
;X; (lambda (v0)
|
|
;X; (and (fixnum? v0)
|
|
;X; (mk-seq a0 (make-primcall op (list v0 a1))))))
|
|
;X; (make-primcall op (list a0 a1)))))
|
|
;X; (giveup))]
|
|
;;; unoptimizables
|
|
[(error syntax-error $syntax-dispatch $sc-put-cte
|
|
primitive-set! apply)
|
|
(giveup)]
|
|
))
|
|
|
|
|
|
(define (mk-mvcall p c)
|
|
(record-case p
|
|
[(funcall) (make-mvcall p c)]
|
|
[(seq e0 e1)
|
|
(make-seq e0 (mk-mvcall e1 c))]
|
|
[(bind lhs* rhs* body)
|
|
(make-bind lhs* rhs* (mk-mvcall body c))]
|
|
[else (error 'mk-mvcall "invalid producer ~s" (unparse p))]))
|
|
|
|
(define (copy-propagate x)
|
|
(define who 'copy-propagate)
|
|
(define the-void (make-primcall 'void '()))
|
|
(define (known-value x)
|
|
(record-case x
|
|
[(constant) x] ; known
|
|
[(primref) x] ; known
|
|
[(bind lhs* rhs* body) (known-value body)]
|
|
[(fix lhs* rhs* body) (known-value body)]
|
|
[(seq e0 e1) (known-value e1)]
|
|
[else #f]))
|
|
(define (same-values? x y)
|
|
(cond
|
|
[(constant? x)
|
|
(and (constant? y)
|
|
(eq? (constant-value x)
|
|
(constant-value y)))]
|
|
[(primref? x)
|
|
(and (primref? y)
|
|
(eq? (primref-name x)
|
|
(primref-name y)))]
|
|
[else #f]))
|
|
(define (predicate-value x)
|
|
(record-case x
|
|
[(constant t) (if t 't 'f)]
|
|
[(bind lhs rhs body) (predicate-value body)]
|
|
[(fix lhs rhs body) (predicate-value body)]
|
|
[(seq e0 e1) (predicate-value e1)]
|
|
[else #f]))
|
|
(define (do-conditional e0 e1 e2 k)
|
|
(let ([e0 (Pred e0)])
|
|
(cond
|
|
[(predicate-value e0) =>
|
|
(lambda (v)
|
|
(if (eq? v 't) (k e1) (k e2)))]
|
|
[else
|
|
(make-conditional e0 (k e1) (k e2))])))
|
|
(define (partition-referenced lhs* rhs*)
|
|
(cond
|
|
[(null? lhs*) (values '() '() the-void)]
|
|
[else
|
|
(let ([lhs (car lhs*)] [rhs (car rhs*)])
|
|
(let-values ([(lhs* rhs* eff*)
|
|
(partition-referenced
|
|
(cdr lhs*) (cdr rhs*))])
|
|
(cond
|
|
[(var-referenced lhs)
|
|
(values (cons lhs lhs*) (cons rhs rhs*) eff*)]
|
|
[else
|
|
(values lhs* rhs* (mk-seq eff* (Effect rhs)))])))]))
|
|
(define (partition/assign-known lhs* rhs*)
|
|
(cond
|
|
[(null? lhs*) (values '() '() the-void)]
|
|
[else
|
|
(let ([lhs (car lhs*)] [rhs (car rhs*)])
|
|
(let-values ([(lhs* rhs* eff*)
|
|
(partition/assign-known
|
|
(cdr lhs*) (cdr rhs*))])
|
|
(cond
|
|
[(and (not (var-assigned lhs)) (known-value rhs)) =>
|
|
(lambda (v)
|
|
(set-var-referenced! lhs v)
|
|
(values lhs* rhs* (mk-seq eff* rhs)))]
|
|
[else
|
|
(values (cons lhs lhs*) (cons rhs rhs*) eff*)])))]))
|
|
(define (do-bind lhs* rhs* body k)
|
|
(let-values ([(lhs* rhs* eff0)
|
|
(partition-referenced lhs* rhs*)])
|
|
(let ([rhs* (map Value rhs*)])
|
|
(let-values ([(lhs* rhs* eff1)
|
|
(partition/assign-known lhs* rhs*)])
|
|
(let ([body
|
|
(cond
|
|
[(null? lhs*) (k body)]
|
|
[else
|
|
(make-bind lhs* rhs* (k body))])])
|
|
(mk-seq (mk-seq eff0 eff1) body))))))
|
|
(define (do-fix lhs* rhs* body k)
|
|
(let-values ([(lhs* rhs* eff*)
|
|
(partition-referenced lhs* rhs*)])
|
|
(cond
|
|
[(null? lhs*) (k body)]
|
|
[else
|
|
(make-fix lhs* (map Value rhs*) (k body))])))
|
|
(define (mk-seq e0 e1) ;;; keep e1 seq-free.
|
|
(cond
|
|
[(and (primcall? e0) (eq? (primcall-op e0) 'void)) e1]
|
|
[(seq? e1)
|
|
(make-seq (make-seq e0 (seq-e0 e1)) (seq-e1 e1))]
|
|
[else
|
|
(make-seq e0 e1)]))
|
|
(define (do-clambda g cls*)
|
|
(make-clambda g
|
|
(map (lambda (cls)
|
|
(record-case cls
|
|
[(clambda-case info body)
|
|
(make-clambda-case info (Value body))]))
|
|
cls*)
|
|
#f))
|
|
(define (Effect x)
|
|
(record-case x
|
|
[(constant) the-void]
|
|
[(var) the-void]
|
|
[(primref) the-void]
|
|
[(bind lhs* rhs* body)
|
|
(do-bind lhs* rhs* body Effect)]
|
|
[(fix lhs* rhs* body)
|
|
(do-fix lhs* rhs* body Effect)]
|
|
[(conditional e0 e1 e2)
|
|
(let ([e0 (Pred e0)])
|
|
(cond
|
|
[(predicate-value e0) =>
|
|
(lambda (v)
|
|
(mk-seq e0 (if (eq? v 't) (Effect e1) (Effect e2))))]
|
|
[else
|
|
(make-conditional e0 (Effect e1) (Effect e2))]))]
|
|
[(seq e0 e1) (mk-seq (Effect e0) (Effect e1))]
|
|
[(clambda g cls*) the-void]
|
|
[(primcall rator rand*)
|
|
(optimize-primcall 'e rator (map Value rand*))]
|
|
[(funcall rator rand*)
|
|
(let ([rator (Value rator)])
|
|
(cond
|
|
[(known-value rator) =>
|
|
(lambda (v)
|
|
(record-case v
|
|
[(primref op)
|
|
(mk-seq rator
|
|
(optimize-primcall 'e op (map Value rand*)))]
|
|
[else
|
|
(make-funcall rator (map Value rand*))]))]
|
|
[else (make-funcall rator (map Value rand*))]))]
|
|
[(forcall rator rand*)
|
|
(make-forcall rator (map Value rand*))]
|
|
[(mvcall p c)
|
|
(mk-mvcall (Value p) (Value c))]
|
|
[(assign lhs rhs)
|
|
(unless (var-assigned lhs)
|
|
(error who "var ~s is not assigned" lhs))
|
|
(if (var-referenced lhs)
|
|
(make-assign lhs (Value rhs))
|
|
(Effect rhs))]
|
|
[else (error who "invalid effect expression ~s" (unparse x))]))
|
|
(define (Pred x)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var)
|
|
(let ([r (var-referenced x)])
|
|
(if (constant? r) r x))]
|
|
[(primref) (make-constant #t)]
|
|
[(bind lhs* rhs* body)
|
|
(do-bind lhs* rhs* body Pred)]
|
|
[(fix lhs* rhs* body)
|
|
(do-fix lhs* rhs* body Pred)]
|
|
[(conditional e0 e1 e2)
|
|
(let ([e0 (Pred e0)])
|
|
(cond
|
|
[(predicate-value e0) =>
|
|
(lambda (t0)
|
|
(mk-seq e0 (if (eq? t0 't) (Pred e1) (Pred e2))))]
|
|
[else
|
|
(let ([e1 (Pred e1)] [e2 (Pred e2)])
|
|
(cond
|
|
[(predicate-value e1) =>
|
|
(lambda (t1)
|
|
(cond
|
|
[(predicate-value e2) =>
|
|
(lambda (t2)
|
|
(if (eq? t1 t2)
|
|
(mk-seq (make-conditional e0 e1 e2)
|
|
(make-constant (if (eq? t1 't) #t #f)))
|
|
(make-conditional e0 e1 e2)))]
|
|
[else (make-conditional e0 e1 e2)]))]
|
|
[else (make-conditional e0 e1 e2)]))]))]
|
|
[(seq e0 e1) (mk-seq (Effect e0) (Pred e1))]
|
|
[(clambda g cls*) (make-constant #t)]
|
|
[(primcall rator rand*)
|
|
(optimize-primcall 'p rator (map Value rand*))]
|
|
[(funcall rator rand*)
|
|
(let ([rator (Value rator)])
|
|
(cond
|
|
[(known-value rator) =>
|
|
(lambda (v)
|
|
(record-case v
|
|
[(primref op)
|
|
(mk-seq rator
|
|
(optimize-primcall 'p op (map Value rand*)))]
|
|
[else
|
|
(make-funcall rator (map Value rand*))]))]
|
|
[else (make-funcall rator (map Value rand*))]))]
|
|
[(forcall rator rand*)
|
|
(make-forcall rator (map Value rand*))]
|
|
[(assign lhs rhs)
|
|
(mk-seq (Effect x) (make-constant #t))]
|
|
[(mvcall p c)
|
|
(mk-mvcall (Value p) (Value c))]
|
|
[else (error who "invalid pred expression ~s" (unparse x))]))
|
|
(define (Value x)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var)
|
|
(let ([r (var-referenced x)])
|
|
(case r
|
|
[(#t) x]
|
|
[(#f) (error who "Reference to a var ~s that should not be" x)]
|
|
[else r]))]
|
|
[(primref) x]
|
|
[(bind lhs* rhs* body)
|
|
(do-bind lhs* rhs* body Value)]
|
|
[(fix lhs* rhs* body)
|
|
(do-fix lhs* rhs* body Value)]
|
|
[(conditional e0 e1 e2)
|
|
(let ([e0 (Pred e0)])
|
|
(cond
|
|
[(predicate-value e0) =>
|
|
(lambda (t0)
|
|
(mk-seq e0 (if (eq? t0 't) (Value e1) (Value e2))))]
|
|
[else
|
|
(let ([e1 (Value e1)] [e2 (Value e2)])
|
|
(let ([t1 (known-value e1)] [t2 (known-value e2)])
|
|
(cond
|
|
[(and t1 t2)
|
|
(if (same-values? t1 t2)
|
|
(mk-seq (make-conditional e0 e1 e2) t1)
|
|
(make-conditional e0 e1 e2))]
|
|
[else (make-conditional e0 e1 e2)])))]))]
|
|
[(seq e0 e1) (mk-seq (Effect e0) (Value e1))]
|
|
[(clambda g cls*) (do-clambda g cls*)]
|
|
[(primcall rator rand*)
|
|
(optimize-primcall 'v rator (map Value rand*))]
|
|
[(funcall rator rand*)
|
|
(let ([rator (Value rator)])
|
|
(cond
|
|
[(known-value rator) =>
|
|
(lambda (v)
|
|
(record-case v
|
|
[(primref op)
|
|
(mk-seq rator
|
|
(optimize-primcall 'v op (map Value rand*)))]
|
|
[else
|
|
(make-funcall rator (map Value rand*))]))]
|
|
[else (make-funcall rator (map Value rand*))]))]
|
|
[(forcall rator rand*)
|
|
(make-forcall rator (map Value rand*))]
|
|
[(assign lhs rhs)
|
|
(mk-seq (Effect x) the-void)]
|
|
[(mvcall p c)
|
|
(mk-mvcall (Value p) (Value c))]
|
|
[else (error who "invalid value expression ~s" (unparse x))]))
|
|
(let ([x (Value x)])
|
|
;;; since we messed up the references and assignments here, we
|
|
;;; redo them
|
|
(uncover-assigned/referenced x)))
|
|
|
|
|
|
(define (rewrite-assignments x)
|
|
(define who 'rewrite-assignments)
|
|
(define (fix-lhs* lhs*)
|
|
(cond
|
|
[(null? lhs*) (values '() '() '())]
|
|
[else
|
|
(let ([x (car lhs*)])
|
|
(let-values ([(lhs* a-lhs* a-rhs*) (fix-lhs* (cdr lhs*))])
|
|
(cond
|
|
[(var-assigned x)
|
|
(let ([t (unique-var 'assignment-tmp)])
|
|
(values (cons t lhs*) (cons x a-lhs*) (cons t a-rhs*)))]
|
|
[else
|
|
(values (cons x lhs*) a-lhs* a-rhs*)])))]))
|
|
(define (bind-assigned lhs* rhs* body)
|
|
(cond
|
|
[(null? lhs*) body]
|
|
[else
|
|
(make-bind lhs*
|
|
(map (lambda (rhs) (make-primcall 'vector (list rhs))) rhs*)
|
|
body)]))
|
|
(define (Expr x)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var)
|
|
(cond
|
|
[(var-assigned x)
|
|
(make-primcall '$vector-ref (list x (make-constant 0)))]
|
|
[else x])]
|
|
[(primref) x]
|
|
[(bind lhs* rhs* body)
|
|
(let-values ([(lhs* a-lhs* a-rhs*) (fix-lhs* lhs*)])
|
|
(make-bind lhs* (map Expr rhs*)
|
|
(bind-assigned a-lhs* a-rhs* (Expr body))))]
|
|
[(fix lhs* rhs* body)
|
|
(make-fix lhs* (map Expr rhs*) (Expr body))]
|
|
[(conditional test conseq altern)
|
|
(make-conditional (Expr test) (Expr conseq) (Expr altern))]
|
|
[(seq e0 e1) (make-seq (Expr e0) (Expr e1))]
|
|
[(clambda g cls*)
|
|
(make-clambda g
|
|
(map (lambda (cls)
|
|
(record-case cls
|
|
[(clambda-case info body)
|
|
(record-case info
|
|
[(case-info label fml* proper)
|
|
(let-values ([(fml* a-lhs* a-rhs*) (fix-lhs* fml*)])
|
|
(make-clambda-case
|
|
(make-case-info label fml* proper)
|
|
(bind-assigned a-lhs* a-rhs* (Expr body))))])]))
|
|
cls*)
|
|
#f)]
|
|
[(primcall op rand*)
|
|
(make-primcall op (map Expr rand*))]
|
|
[(forcall op rand*)
|
|
(make-forcall op (map Expr rand*))]
|
|
[(funcall rator rand*)
|
|
(make-funcall (Expr rator) (map Expr rand*))]
|
|
[(assign lhs rhs)
|
|
(unless (var-assigned lhs)
|
|
(error 'rewrite-assignments "not assigned ~s in ~s" lhs x))
|
|
(make-primcall '$vector-set! (list lhs (make-constant 0) (Expr rhs)))]
|
|
[(mvcall p c) (make-mvcall (Expr p) (Expr c))]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(Expr x))
|
|
|
|
(define (optimize-for-direct-jumps x)
|
|
(define who 'optimize-for-direct-jumps)
|
|
(define (init-var x)
|
|
(set-var-referenced! x #f))
|
|
(define (set-var x v)
|
|
(record-case v
|
|
[(clambda) (set-var-referenced! x v)]
|
|
[(var)
|
|
(cond
|
|
[(bound-var v) => (lambda (v) (set-var-referenced! x v))]
|
|
[else (void)])]
|
|
[else (void)]))
|
|
(define (bound-var x)
|
|
(var-referenced x))
|
|
(define (optimize c rator rand*)
|
|
(let ([n (length rand*)])
|
|
(record-case c
|
|
[(clambda main-label cls*)
|
|
(let f ([cls* cls*])
|
|
(cond
|
|
[(null? cls*)
|
|
;;; none matching?
|
|
(make-funcall rator rand*)]
|
|
[else
|
|
(record-case (clambda-case-info (car cls*))
|
|
[(case-info label fml* proper)
|
|
(cond
|
|
[proper
|
|
(if (fx= n (length fml*))
|
|
(make-jmpcall label rator rand*)
|
|
(f (cdr cls*)))]
|
|
[else
|
|
(if (fx<= (length (cdr fml*)) n)
|
|
(make-jmpcall label rator
|
|
(let f ([fml* (cdr fml*)] [rand* rand*])
|
|
(cond
|
|
[(null? fml*)
|
|
(list (make-primcall 'list rand*))]
|
|
[else
|
|
(cons (car rand*)
|
|
(f (cdr fml*) (cdr rand*)))])))
|
|
(f (cdr cls*)))])])]))])))
|
|
(define (Expr x)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var) x]
|
|
[(primref) x]
|
|
[(bind lhs* rhs* body)
|
|
(for-each init-var lhs*)
|
|
(let ([rhs* (map Expr rhs*)])
|
|
(for-each set-var lhs* rhs*)
|
|
(make-bind lhs* rhs* (Expr body)))]
|
|
[(fix lhs* rhs* body)
|
|
(for-each set-var lhs* rhs*)
|
|
(make-fix lhs* (map Expr rhs*) (Expr body))]
|
|
[(conditional test conseq altern)
|
|
(make-conditional (Expr test) (Expr conseq) (Expr altern))]
|
|
[(seq e0 e1) (make-seq (Expr e0) (Expr e1))]
|
|
[(clambda g cls*)
|
|
(make-clambda g
|
|
(map (lambda (cls)
|
|
(record-case cls
|
|
[(clambda-case info body)
|
|
(for-each init-var (case-info-args info))
|
|
(make-clambda-case info (Expr body))]))
|
|
cls*)
|
|
#f)]
|
|
[(primcall op rand*)
|
|
(make-primcall op (map Expr rand*))]
|
|
[(forcall op rand*)
|
|
(make-forcall op (map Expr rand*))]
|
|
[(funcall rator rand*)
|
|
(let ([rator (Expr rator)])
|
|
(cond
|
|
[(and (var? rator) (bound-var rator)) =>
|
|
(lambda (c)
|
|
(optimize c rator (map Expr rand*)))]
|
|
[(and (primref? rator)
|
|
(eq? (primref-name rator) '$$apply))
|
|
(make-jmpcall SL_apply
|
|
(Expr (car rand*))
|
|
(map Expr (cdr rand*)))]
|
|
[else
|
|
(make-funcall rator (map Expr rand*))]))]
|
|
[(mvcall p c) (make-mvcall (Expr p) (Expr c))]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(Expr x))
|
|
|
|
|
|
(define (convert-closures prog)
|
|
(define who 'convert-closures)
|
|
(define (Expr* x*)
|
|
(cond
|
|
[(null? x*) (values '() '())]
|
|
[else
|
|
(let-values ([(a a-free) (Expr (car x*))]
|
|
[(d d-free) (Expr* (cdr x*))])
|
|
(values (cons a d) (union a-free d-free)))]))
|
|
(define (do-clambda* x*)
|
|
(cond
|
|
[(null? x*) (values '() '())]
|
|
[else
|
|
(let-values ([(a a-free) (do-clambda (car x*))]
|
|
[(d d-free) (do-clambda* (cdr x*))])
|
|
(values (cons a d) (union a-free d-free)))]))
|
|
(define (do-clambda x)
|
|
(record-case x
|
|
[(clambda g cls*)
|
|
(let-values ([(cls* free)
|
|
(let f ([cls* cls*])
|
|
(cond
|
|
[(null? cls*) (values '() '())]
|
|
[else
|
|
(record-case (car cls*)
|
|
[(clambda-case info body)
|
|
(let-values ([(body body-free) (Expr body)]
|
|
[(cls* cls*-free) (f (cdr cls*))])
|
|
(values
|
|
(cons (make-clambda-case info body) cls*)
|
|
(union (difference body-free (case-info-args info))
|
|
cls*-free)))])]))])
|
|
(values (make-closure (make-clambda g cls* free) free)
|
|
free))]))
|
|
(define (Expr ex)
|
|
(record-case ex
|
|
[(constant) (values ex '())]
|
|
[(var) (values ex (singleton ex))]
|
|
[(primref) (values ex '())]
|
|
[(bind lhs* rhs* body)
|
|
(let-values ([(rhs* rhs-free) (Expr* rhs*)]
|
|
[(body body-free) (Expr body)])
|
|
(values (make-bind lhs* rhs* body)
|
|
(union rhs-free (difference body-free lhs*))))]
|
|
[(fix lhs* rhs* body)
|
|
(let-values ([(rhs* rfree) (do-clambda* rhs*)]
|
|
[(body bfree) (Expr body)])
|
|
(values (make-fix lhs* rhs* body)
|
|
(difference (union bfree rfree) lhs*)))]
|
|
[(conditional test conseq altern)
|
|
(let-values ([(test test-free) (Expr test)]
|
|
[(conseq conseq-free) (Expr conseq)]
|
|
[(altern altern-free) (Expr altern)])
|
|
(values (make-conditional test conseq altern)
|
|
(union test-free (union conseq-free altern-free))))]
|
|
[(seq e0 e1)
|
|
(let-values ([(e0 e0-free) (Expr e0)]
|
|
[(e1 e1-free) (Expr e1)])
|
|
(values (make-seq e0 e1) (union e0-free e1-free)))]
|
|
[(clambda)
|
|
(do-clambda ex)]
|
|
[(primcall op rand*)
|
|
(let-values ([(rand* rand*-free) (Expr* rand*)])
|
|
(values (make-primcall op rand*) rand*-free))]
|
|
[(forcall op rand*)
|
|
(let-values ([(rand* rand*-free) (Expr* rand*)])
|
|
(values (make-forcall op rand*) rand*-free))]
|
|
[(funcall rator rand*)
|
|
(let-values ([(rator rat-free) (Expr rator)]
|
|
[(rand* rand*-free) (Expr* rand*)])
|
|
(values (make-funcall rator rand*)
|
|
(union rat-free rand*-free)))]
|
|
[(jmpcall label rator rand*)
|
|
(let-values ([(rator rat-free) (Expr rator)]
|
|
[(rand* rand*-free) (Expr* rand*)])
|
|
(values (make-jmpcall label rator rand*)
|
|
(union rat-free rand*-free)))]
|
|
[(mvcall p c)
|
|
(let-values ([(p p-free) (Expr p)]
|
|
[(c c-free) (Expr c)])
|
|
(record-case c
|
|
[(closure code free^)
|
|
(values (make-mvcall p code)
|
|
(union p-free c-free))]
|
|
[else (error who "invalid mvcall consumer ~s"
|
|
(unparse c))]))]
|
|
[else (error who "invalid expression ~s" (unparse ex))]))
|
|
(let-values ([(prog free) (Expr prog)])
|
|
(unless (null? free)
|
|
(error 'convert-closures "free vars ~s encountered in ~a"
|
|
free (unparse prog)))
|
|
prog))
|
|
|
|
(define (optimize-closures/lift-codes x)
|
|
(define who 'optimize-closures/lift-codes)
|
|
(define all-codes '())
|
|
(define (init-non-thunk var)
|
|
(set-var-assigned! var #f)
|
|
(set-var-referenced! var #f))
|
|
(define (var-thunk var)
|
|
(var-referenced var))
|
|
(define (make-thunk-var var thunk)
|
|
(set-var-referenced! var thunk))
|
|
(define (thunk? x)
|
|
(record-case x
|
|
[(closure code free*)
|
|
(null? free*)]
|
|
[else #f]))
|
|
(define (trim/lift-code code free*)
|
|
(record-case code
|
|
[(clambda label cls* free*/dropped)
|
|
(let ([cls* (map
|
|
(lambda (x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(for-each init-non-thunk
|
|
(case-info-args info))
|
|
(make-clambda-case info (E body))]))
|
|
cls*)])
|
|
(let ([g (make-code-loc label)])
|
|
(set! all-codes
|
|
(cons (make-clambda label cls* free*) all-codes))
|
|
g))]))
|
|
(define (optimize-one-closure code free)
|
|
(let ([free (trim-vars free)])
|
|
(make-closure (trim/lift-code code free) free)))
|
|
(define (trim p? ls)
|
|
(cond
|
|
[(null? ls) '()]
|
|
[(p? (car ls)) (trim p? (cdr ls))]
|
|
[else
|
|
(cons (car ls) (trim p? (cdr ls)))]))
|
|
(define (trim-vars ls)
|
|
(trim var-thunk ls))
|
|
(define (trim-thunks ls)
|
|
(trim thunk? ls))
|
|
(define (do-bind lhs* rhs* body)
|
|
(for-each init-non-thunk lhs*)
|
|
(let ([rhs* (map E rhs*)])
|
|
(for-each (lambda (x v)
|
|
(when (thunk? v) (make-thunk-var x v)))
|
|
lhs* rhs*)
|
|
(make-bind (trim-vars lhs*) (trim-thunks rhs*) (E body))))
|
|
(define (do-fix lhs* rhs* body)
|
|
(for-each init-non-thunk lhs*)
|
|
(let ([free** ;;; trim the free lists first; after init.
|
|
(map (lambda (x) (trim-vars (closure-free* x))) rhs*)])
|
|
(define-record node (name code deps whacked free))
|
|
(let ([node* (map (lambda (lhs rhs)
|
|
(let ([n (make-node lhs (closure-code rhs) '() #f '())])
|
|
(make-thunk-var lhs n)
|
|
n))
|
|
lhs* rhs*)])
|
|
;;; if x is free in y, then whenever x becomes a non-thunk,
|
|
;;; y also becomes a non-thunk. Here, we mark these
|
|
;;; dependencies.
|
|
(for-each
|
|
(lambda (my-node free*)
|
|
(for-each (lambda (fvar)
|
|
(cond
|
|
[(var-thunk fvar) => ;;; one of ours
|
|
(lambda (her-node)
|
|
(set-node-deps! her-node
|
|
(cons my-node (node-deps her-node))))]
|
|
[else ;;; not one of ours
|
|
(set-node-free! my-node
|
|
(cons fvar (node-free my-node)))]))
|
|
free*))
|
|
node* free**)
|
|
;;; Next, we go over the list of nodes, and if we find one
|
|
;;; that has any free variables, we know it's a non-thunk,
|
|
;;; so we whack it and add it to all of its dependents.
|
|
(let ()
|
|
(define (process-node x)
|
|
(unless (null? (node-free x))
|
|
(unless (node-whacked x)
|
|
(set-node-whacked! x #t)
|
|
(for-each
|
|
(lambda (y)
|
|
(set-node-free! y
|
|
(cons (node-name x) (node-free y)))
|
|
(process-node y))
|
|
(node-deps x)))))
|
|
(for-each process-node node*))
|
|
;;; Now those that have free variables are actual closures.
|
|
;;; Those with no free variables are actual thunks.
|
|
(let ([rhs*
|
|
(map
|
|
(lambda (node)
|
|
(let ([free (node-free node)])
|
|
(let ([closure
|
|
(make-closure (node-code node) free)])
|
|
(if (null? free)
|
|
(make-thunk-var (node-name node) closure)
|
|
(init-non-thunk (node-name node)))
|
|
closure)))
|
|
node*)])
|
|
(for-each
|
|
(lambda (x)
|
|
(set-closure-code! x
|
|
(trim/lift-code
|
|
(closure-code x)
|
|
(closure-free* x))))
|
|
rhs*)
|
|
;;;
|
|
(make-fix (trim-vars lhs*)
|
|
(trim-thunks rhs*)
|
|
(E body))))))
|
|
(define (E x)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var) (or (var-thunk x) x)]
|
|
[(primref) x]
|
|
[(bind lhs* rhs* body) (do-bind lhs* rhs* body)]
|
|
[(fix lhs* rhs* body) (do-fix lhs* rhs* body)]
|
|
[(conditional test conseq altern)
|
|
(make-conditional (E test) (E conseq) (E altern))]
|
|
[(seq e0 e1) (make-seq (E e0) (E e1))]
|
|
[(closure c free) (optimize-one-closure c free)]
|
|
[(primcall op rand*) (make-primcall op (map E rand*))]
|
|
[(forcall op rand*) (make-forcall op (map E rand*))]
|
|
[(funcall rator rand*) (make-funcall (E rator) (map E rand*))]
|
|
[(jmpcall label rator rand*) (make-jmpcall label (E rator) (map E rand*))]
|
|
[(mvcall p c)
|
|
(record-case c
|
|
[(clambda label cases free)
|
|
(make-mvcall (E p)
|
|
(make-clambda label
|
|
(map (lambda (x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(make-clambda-case info (E body))]))
|
|
cases)
|
|
free))])]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(let ([x (E x)])
|
|
(make-codes all-codes x)))
|
|
|
|
|
|
|
|
(include "libcogen1.ss")
|
|
|
|
|
|
|
|
|
|
(define (lift-codes x) ;;; NOT USED
|
|
(define who 'lift-codes)
|
|
(define all-codes '())
|
|
(define (do-code x)
|
|
(record-case x
|
|
[(clambda label cls* free)
|
|
(let ([cls* (map
|
|
(lambda (x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(make-clambda-case info (E body))]))
|
|
cls*)])
|
|
(let ([g (make-code-loc label)])
|
|
(set! all-codes
|
|
(cons (make-clambda label cls* free) all-codes))
|
|
g))]))
|
|
(define (E x)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var) x]
|
|
[(primref) x]
|
|
[(bind lhs* rhs* body)
|
|
(make-bind lhs* (map E rhs*) (E body))]
|
|
[(fix lhs* rhs* body)
|
|
(make-fix lhs* (map E rhs*) (E body))]
|
|
[(conditional test conseq altern)
|
|
(make-conditional (E test) (E conseq) (E altern))]
|
|
[(seq e0 e1) (make-seq (E e0) (E e1))]
|
|
[(closure c free) (make-closure (do-code c) free)]
|
|
[(primcall op rand*) (make-primcall op (map E rand*))]
|
|
[(forcall op rand*) (make-forcall op (map E rand*))]
|
|
[(funcall rator rand*) (make-funcall (E rator) (map E rand*))]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(let ([x (E x)])
|
|
(make-codes all-codes x)))
|
|
|
|
(define (syntactically-valid? op rand*)
|
|
(define (valid-arg-count? op rand*)
|
|
(let ([n (open-coded-primitive-args op)] [m (length rand*)])
|
|
(cond
|
|
[(eq? n 'any) #t]
|
|
[(eq? n 'positive) (fx> m 1)]
|
|
[(eq? n 'no-code)
|
|
(error 'syntactically-valid
|
|
"should not primcall non codable prim ~s" op)]
|
|
[(fixnum? n)
|
|
(cond
|
|
[(fx= n m) #t]
|
|
[else
|
|
(error 'compile
|
|
"Possible incorrect number of args in ~s"
|
|
(cons op (map unparse rand*)))
|
|
#f])]
|
|
[else (error 'do-primcall "BUG: what ~s" n)])))
|
|
(define (check op pred?)
|
|
(lambda (arg)
|
|
(record-case arg
|
|
[(constant c)
|
|
(cond
|
|
[(pred? c) #t]
|
|
[else
|
|
(error 'compile "Possible argument error to primitive ~s" op)
|
|
#f])]
|
|
[(primref)
|
|
(cond
|
|
[(pred? (lambda (x) x)) #t]
|
|
[else
|
|
(error 'compile "Possible argument error to primitive ~s" op)
|
|
#f])]
|
|
[else #t])))
|
|
(define (nonnegative-fixnum? n)
|
|
(and (fixnum? n) (fx>= n 0)))
|
|
(define (byte? n)
|
|
(and (fixnum? n) (fx<= 0 n) (fx<= n 127)))
|
|
(define (valid-arg-types? op rand*)
|
|
(case op
|
|
[(fixnum? immediate? boolean? char? vector? string? procedure?
|
|
null? pair? not cons eq? vector symbol? error eof-object eof-object?
|
|
void $unbound-object? $code? $forward-ptr? bwp-object?
|
|
pointer-value top-level-value car cdr list* list $record
|
|
port? input-port? output-port?
|
|
$make-port/input $make-port/output $make-port/both
|
|
$port-handler
|
|
$port-input-buffer $port-input-index $port-input-size
|
|
$port-output-buffer $port-output-index $port-output-size
|
|
$set-port-input-index! $set-port-input-size!
|
|
$set-port-output-index! $set-port-output-size! )
|
|
'#t]
|
|
[($fxadd1 $fxsub1 $fxzero? $fxlognot $fxlogor $fxlogand $fx+ $fx- $fx*
|
|
$fx= $fx< $fx<= $fx> $fx>= $fxquotient $fxmodulo $fxsll $fxsra $fxlogxor $exit)
|
|
(andmap (check op fixnum?) rand*)]
|
|
[($fixnum->char)
|
|
(andmap (check op byte?) rand*)]
|
|
[($char->fixnum $char= $char< $char<= $char> $char>= $string)
|
|
(andmap (check op char?) rand*)]
|
|
[($make-vector $make-string)
|
|
(andmap (check op nonnegative-fixnum?) rand*)]
|
|
[($car $cdr)
|
|
(andmap (check op pair?) rand*)]
|
|
[($vector-length)
|
|
(andmap (check op vector?) rand*)]
|
|
[($string-length)
|
|
(andmap (check op string?) rand*)]
|
|
[($set-car! $set-cdr!)
|
|
((check op pair?) (car rand*))]
|
|
[($vector-ref $vector-set!)
|
|
(and ((check op vector?) (car rand*))
|
|
((check op nonnegative-fixnum?) (cadr rand*)))]
|
|
[($string-ref $string-set!
|
|
$string-ref-16+0 $string-ref-16+1 $string-ref-8+0 $string-ref-8+2)
|
|
(and ((check op string?) (car rand*))
|
|
((check op nonnegative-fixnum?) (cadr rand*)))]
|
|
[($symbol-string $symbol-unique-string)
|
|
(andmap (check op symbol?) rand*)]
|
|
[($constant-ref $set-constant! $intern $pcb-set! $pcb-ref $make-symbol
|
|
$symbol-value $set-symbol-value! $symbol-plist $set-symbol-plist!
|
|
$set-symbol-system-value! $set-symbol-system-value!
|
|
$set-symbol-unique-string!
|
|
$set-symbol-string!
|
|
$seal-frame-and-call $frame->continuation $code->closure
|
|
$closure-code
|
|
$code-size $code-reloc-vector $code-freevars
|
|
$code-ref $code-set!
|
|
$make-record $record? $record/rtd? $record-rtd $record-ref $record-set!
|
|
primitive-set! primitive-ref
|
|
$make-tcbucket $tcbucket-key $tcbucket-val $tcbucket-next
|
|
$set-tcbucket-val!
|
|
$set-tcbucket-next! $set-tcbucket-tconc!)
|
|
#t]
|
|
[else (error 'valid-arg-types? "unhandled op ~s" op)]))
|
|
(and (valid-arg-count? op rand*)
|
|
(or (null? rand*)
|
|
(valid-arg-types? op rand*))))
|
|
|
|
(begin ;;; UNINLINED ANALYSIS
|
|
;;; the output of simplify-operands differs from the input in that the
|
|
;;; operands to primcalls are all simple (variables, primrefs, or constants).
|
|
;;; funcalls to open-codable primrefs whos arguments are "ok" are converted to
|
|
;;; primcalls.
|
|
(define uninlined '())
|
|
(define (mark-uninlined x)
|
|
(cond
|
|
[(assq x uninlined) =>
|
|
(lambda (p) (set-cdr! p (fxadd1 (cdr p))))]
|
|
[else (set! uninlined (cons (cons x 1) uninlined))]))
|
|
(module ()
|
|
(primitive-set! 'uninlined-stats
|
|
(lambda ()
|
|
(let f ([ls uninlined] [ac '()])
|
|
(cond
|
|
[(null? ls) ac]
|
|
[(fx> (cdar ls) 15)
|
|
(f (cdr ls) (cons (car ls) ac))]
|
|
[else (f (cdr ls) ac)]))))))
|
|
|
|
(define (introduce-primcalls x)
|
|
(define who 'introduce-primcalls)
|
|
(define (Expr x)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var) x]
|
|
[(primref) x]
|
|
[(closure) x]
|
|
[(bind lhs* rhs* body)
|
|
(make-bind lhs* (map Expr rhs*) (Expr body))]
|
|
[(fix lhs* rhs* body)
|
|
(make-fix lhs* (map Expr rhs*) (Expr body))]
|
|
[(conditional test conseq altern)
|
|
(make-conditional (Expr test) (Expr conseq) (Expr altern))]
|
|
[(seq e0 e1) (make-seq (Expr e0) (Expr e1))]
|
|
[(primcall op arg*)
|
|
(case op
|
|
;[(values)
|
|
; (if (fx= (length arg*) 1)
|
|
; (Expr (car arg*))
|
|
; (begin
|
|
; (warning 'compile "possible incorrect number of values")
|
|
; (make-funcall (make-primref 'values) (map Expr arg*))))]
|
|
[else
|
|
(make-primcall op (map Expr arg*))])]
|
|
[(forcall op arg*)
|
|
(make-forcall op (map Expr arg*))]
|
|
[(funcall rator rand*)
|
|
(cond
|
|
[(and (primref? rator)
|
|
(open-codeable? (primref-name rator))
|
|
(syntactically-valid? (primref-name rator) rand*))
|
|
(Expr (make-primcall (primref-name rator) rand*))]
|
|
[else
|
|
(when (primref? rator)
|
|
(mark-uninlined (primref-name rator)))
|
|
(make-funcall (Expr rator) (map Expr rand*))])]
|
|
[(jmpcall label op arg*)
|
|
(make-jmpcall label (Expr op) (map Expr arg*))]
|
|
[(mvcall p c)
|
|
(record-case c
|
|
[(clambda label cases free)
|
|
(make-mvcall (Expr p)
|
|
(make-clambda label
|
|
(map (lambda (x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(make-clambda-case info (Expr body))]))
|
|
cases)
|
|
free))])]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(define (Tail x)
|
|
(record-case x
|
|
[(constant) (make-return x)]
|
|
[(var) (make-return x)]
|
|
[(primref) (make-return x)]
|
|
[(closure) (make-return x)]
|
|
[(bind lhs* rhs* body)
|
|
(make-bind lhs* (map Expr rhs*) (Tail body))]
|
|
[(fix lhs* rhs* body)
|
|
(make-fix lhs* (map Expr rhs*) (Tail body))]
|
|
[(conditional test conseq altern)
|
|
(make-conditional (Expr test) (Tail conseq) (Tail altern))]
|
|
[(seq e0 e1) (make-seq (Expr e0) (Tail e1))]
|
|
[(primcall op arg*)
|
|
(case op
|
|
;[(values)
|
|
; (if (fx= (length arg*) 1)
|
|
; (make-return (Expr (car arg*)))
|
|
; (make-return* (map Expr arg*)))]
|
|
[else
|
|
(make-return (make-primcall op (map Expr arg*)))])]
|
|
[(forcall op arg*)
|
|
(make-return (make-forcall op (map Expr arg*)))]
|
|
[(funcall rator rand*)
|
|
(cond
|
|
[(and (primref? rator)
|
|
(open-codeable? (primref-name rator))
|
|
(syntactically-valid? (primref-name rator) rand*))
|
|
(Tail (make-primcall (primref-name rator) rand*))]
|
|
[else
|
|
(make-funcall (Expr rator) (map Expr rand*))])]
|
|
[(jmpcall label op arg*)
|
|
(make-jmpcall label (Expr op) (map Expr arg*))]
|
|
[(mvcall p c)
|
|
(record-case c
|
|
[(clambda label cases free)
|
|
(make-mvcall (Expr p)
|
|
(make-clambda label
|
|
(map (lambda (x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(make-clambda-case info (Tail body))]))
|
|
cases)
|
|
free))])]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(define (CaseExpr x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(make-clambda-case info (Tail body))]))
|
|
(define (CodeExpr x)
|
|
(record-case x
|
|
[(clambda L cases free)
|
|
(make-clambda L (map CaseExpr cases) free)]))
|
|
(define (CodesExpr x)
|
|
(record-case x
|
|
[(codes list body)
|
|
(make-codes (map CodeExpr list) (Tail body))]))
|
|
(CodesExpr x))
|
|
|
|
(define (simplify-operands x)
|
|
(define who 'simplify-operands)
|
|
(define (simple? x)
|
|
(or (constant? x) (var? x) (primref? x)
|
|
(and (closure? x) (null? (closure-free* x)))))
|
|
(define (simplify arg lhs* rhs* k)
|
|
(if (simple? arg)
|
|
(k arg lhs* rhs*)
|
|
(let ([v (unique-var 'tmp)])
|
|
(k v (cons v lhs*) (cons (Expr arg) rhs*)))))
|
|
(define (simplify* arg* lhs* rhs* k)
|
|
(cond
|
|
[(null? arg*) (k '() lhs* rhs*)]
|
|
[else
|
|
(simplify (car arg*) lhs* rhs*
|
|
(lambda (a lhs* rhs*)
|
|
(simplify* (cdr arg*) lhs* rhs*
|
|
(lambda (d lhs* rhs*)
|
|
(k (cons a d) lhs* rhs*)))))]))
|
|
(define (make-bind^ lhs* rhs* body)
|
|
(if (null? lhs*)
|
|
body
|
|
(make-bind lhs* rhs* body)))
|
|
(define (Expr x)
|
|
(record-case x
|
|
[(constant) x]
|
|
[(var) x]
|
|
[(primref) x]
|
|
[(closure) x]
|
|
[(bind lhs* rhs* body)
|
|
(make-bind lhs* (map Expr rhs*) (Expr body))]
|
|
[(fix lhs* rhs* body)
|
|
(make-fix lhs* (map Expr rhs*) (Expr body))]
|
|
[(conditional test conseq altern)
|
|
(make-conditional (Expr test) (Expr conseq) (Expr altern))]
|
|
[(seq e0 e1) (make-seq (Expr e0) (Expr e1))]
|
|
[(primcall op arg*)
|
|
(cond
|
|
[(memq op '(not car cdr cadr fxadd1 fxsub1
|
|
null? pair? fixnum? vector? string?
|
|
char? symbol? eof-object?
|
|
)) ;;; SIMPLIFY
|
|
(make-primcall op (map Expr arg*))]
|
|
[(memq op '(fx+))
|
|
(cond
|
|
[(simple? (cadr arg*))
|
|
(make-primcall op
|
|
(list (Expr (car arg*)) (cadr arg*)))]
|
|
[(simple? (car arg*))
|
|
(make-primcall op
|
|
(list (car arg*) (Expr (cadr arg*))))]
|
|
[else
|
|
(simplify* (cdr arg*) '() '()
|
|
(lambda (a* lhs* rhs*)
|
|
(make-bind^ lhs* rhs*
|
|
(make-primcall op
|
|
(cons (Expr (car arg*)) a*)))))])]
|
|
[else
|
|
(simplify* arg* '() '()
|
|
(lambda (arg* lhs* rhs*)
|
|
(make-bind^ lhs* rhs*
|
|
(make-primcall op arg*))))])]
|
|
[(forcall op arg*)
|
|
(make-forcall op (map Expr arg*))]
|
|
[(funcall rator rand*)
|
|
(make-funcall (Expr rator) (map Expr rand*))]
|
|
[(jmpcall label op arg*)
|
|
(make-jmpcall label (Expr op) (map Expr arg*))]
|
|
[(mvcall p c)
|
|
(make-mvcall (Expr p) (CodeExpr c))]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(define (Tail x)
|
|
(record-case x
|
|
[(return v) (make-return (Expr v))]
|
|
[(bind lhs* rhs* body)
|
|
(make-bind lhs* (map Expr rhs*) (Tail body))]
|
|
[(fix lhs* rhs* body)
|
|
(make-fix lhs* (map Expr rhs*) (Tail body))]
|
|
[(conditional test conseq altern)
|
|
(make-conditional (Expr test) (Tail conseq) (Tail altern))]
|
|
[(seq e0 e1) (make-seq (Expr e0) (Tail e1))]
|
|
[(funcall rator rand*)
|
|
(make-funcall (Expr rator) (map Expr rand*))]
|
|
[(jmpcall label op arg*)
|
|
(make-jmpcall label (Expr op) (map Expr arg*))]
|
|
[(mvcall p c)
|
|
(make-mvcall (Expr p) (CodeExpr c))]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(define (CaseExpr x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(make-clambda-case info (Tail body))]))
|
|
(define (CodeExpr x)
|
|
(record-case x
|
|
[(clambda L clauses free)
|
|
(make-clambda L (map CaseExpr clauses) free)]))
|
|
(define (CodesExpr x)
|
|
(record-case x
|
|
[(codes list body)
|
|
(make-codes (map CodeExpr list) (Tail body))]))
|
|
(CodesExpr x))
|
|
|
|
(define (insert-stack-overflow-checks x)
|
|
(define who 'insert-stack-overflow-checks)
|
|
(define (insert-check body)
|
|
(make-seq
|
|
(make-interrupt-call
|
|
(make-primcall '$fp-overflow '())
|
|
(make-funcall (make-primref 'do-stack-overflow) '()))
|
|
body))
|
|
(define (Expr x)
|
|
(record-case x
|
|
[(constant) #f]
|
|
[(var) #f]
|
|
[(primref) #f]
|
|
[(closure code free*) #f]
|
|
[(bind lhs* rhs* body)
|
|
(or (ormap Expr rhs*) (Expr body))]
|
|
[(fix lhs* rhs* body) (Expr body)]
|
|
[(conditional test conseq altern)
|
|
(or (Expr test) (Expr conseq) (Expr altern))]
|
|
[(seq e0 e1) (or (Expr e0) (Expr e1))]
|
|
[(primcall op arg*) (ormap Expr arg*)]
|
|
[(forcall op arg*) (ormap Expr arg*)]
|
|
[(funcall rator arg*) #t]
|
|
[(jmpcall label rator arg*) #t]
|
|
[(mvcall p c) #t]
|
|
[else (error who "invalid expression ~s" (unparse x))]))
|
|
(define (Tail x)
|
|
(record-case x
|
|
[(return v) (Expr v)]
|
|
[(bind lhs* rhs* body)
|
|
(or (ormap Expr rhs*) (Tail body))]
|
|
[(fix lhs* rhs* body) (Tail body)]
|
|
[(conditional test conseq altern)
|
|
(or (Expr test) (Tail conseq) (Tail altern))]
|
|
[(seq e0 e1) (or (Expr e0) (Tail e1))]
|
|
[(funcall rator arg*) (or (Expr rator) (ormap Expr arg*))]
|
|
[(jmpcall label rator arg*) (or (Expr rator) (ormap Expr arg*))]
|
|
[(mvcall p c) #t]
|
|
[else (error who "invalid tail expression ~s" (unparse x))]))
|
|
(define (CaseExpr x)
|
|
(record-case x
|
|
[(clambda-case info body)
|
|
(if (Tail body)
|
|
(make-clambda-case info (insert-check body))
|
|
x)]))
|
|
(define (CodeExpr x)
|
|
(record-case x
|
|
[(clambda L cases free)
|
|
(make-clambda L (map CaseExpr cases) free)]))
|
|
(define (CodesExpr x)
|
|
(record-case x
|
|
[(codes list body)
|
|
(make-codes (map CodeExpr list)
|
|
(if (Tail body)
|
|
(insert-check body)
|
|
body))]))
|
|
(CodesExpr x))
|
|
|
|
(define (insert-allocation-checks x)
|
|
(define who 'insert-allocation-checks)
|
|
(define (check-bytes n var body)
|
|
(make-seq
|
|
(make-interrupt-call
|
|
(make-primcall '$ap-check-bytes
|
|
(list (make-constant n) var))
|
|
(make-forcall "ik_collect"
|
|
(list
|
|
(make-primcall '$fx+
|
|
(list (make-constant (fx+ n 4096)) var)))))
|
|
body))
|
|
(define (check-words n var body)
|
|
(make-seq
|
|
(make-interrupt-call
|
|
(make-primcall '$ap-check-words
|
|
(list (make-constant n) var))
|
|
(make-forcall "ik_collect" ; (make-primref 'do-overflow-words)
|
|
(list
|
|
(make-primcall '$fx+
|
|
(list (make-constant (fx+ n 4096)) var)))))
|
|
body))
|
|
(define (check-const n body)
|
|
(cond
|
|
[(fxzero? n) body]
|
|
[else
|
|
(make-seq
|
|
(make-interrupt-call
|
|
(make-primcall '$ap-check-const
|
|
(list (make-constant n)))
|
|