4671e1b67e
A record field tagged ^double now reads back as a flonum and feeds the numeric pass, so hintless arithmetic over those fields lowers to fl-ops — the leaf-numeric analog of the ^Vec3 nested-field hints. Combined with the whole-program :double param inference, a vec3-dot over a ^double-fielded record unboxes end to end with no per-fn hints. records.ss: a ^double field tag passes through resolution, and the ctor (and a mutable-field set!) coerce a ^double field to a flonum — JVM primitive-field parity (jolt returned an exact 1, not 1.0, before), and what makes reading the field back as :double sound for an fl-op. types.clj: field-type-from-tag maps "double" -> :double, and a keyword/get lookup whose result is :double annotates the node :num-read :double. numeric.clj reads that annotation and classifies the field read as a :double operand, so the enclosing arithmetic specializes — the read itself keeps its jrec-field-at/jolt-get emit. run-fieldnum.ss gate: ctor coercion (int field -> flonum), field-field arithmetic emitting fl*/fl+, and an untagged field staying generic. make test / shakesmoke green, selfhost holds, 0 new divergences. Co-authored-by: Yogthos <yogthos@gmail.com>
73 lines
3.6 KiB
Scheme
73 lines
3.6 KiB
Scheme
;; run-fieldnum.ss — ^double record field reads unbox to fl-ops (jolt-evr9 R2).
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;;
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;; A record field tagged ^double reads back as a flonum (:double in the lattice),
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;; so hintless arithmetic over those fields — (* (:x a) (:x b)) — lowers to fl-ops,
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;; the same machinery as a ^double param. Two halves pinned here: (1) the ctor
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;; coerces a ^double field to a flonum at construction (JVM parity, and what makes
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;; the fl-op sound), and (2) field-field arithmetic over a record param (typed by
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;; the whole-program fixpoint) emits fl*.
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;;
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;; chez --script host/chez/run-fieldnum.ss
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(import (chezscheme))
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(load "host/chez/rt.ss")
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(set-chez-ns! "clojure.core")
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(load "host/chez/seed/prelude.ss")
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(load "host/chez/post-prelude.ss")
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(set-chez-ns! "user")
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(load "host/chez/host-contract.ss")
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(load "host/chez/seed/image.ss")
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(load "host/chez/compile-eval.ss")
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(define analyze (var-deref "jolt.analyzer" "analyze"))
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(define set-record-shapes! (var-deref "jolt.passes.types" "set-record-shapes!"))
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(define set-protocol-methods! (var-deref "jolt.passes.types" "set-protocol-methods!"))
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(define wp-infer! (var-deref "jolt.passes.types" "wp-infer!"))
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(define run-passes (var-deref "jolt.passes" "run-passes"))
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(define emit (var-deref "jolt.backend-scheme" "emit"))
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(define (anode src) (analyze (make-analyze-ctx "user") (jolt-ce-read src)))
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(define (evals src) (jolt-compile-eval (string-append "(do " src ")") "user"))
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(define (contains-sub? s sub)
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(let ((n (string-length s)) (m (string-length sub)))
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(let loop ((i 0))
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(cond ((> (+ i m) n) #f)
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((string=? (substring s i (+ i m)) sub) #t)
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(else (loop (+ i 1)))))))
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(define fails 0) (define total 0)
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(define (check label actual expected)
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(set! total (+ total 1))
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(unless (equal? actual expected)
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(set! fails (+ fails 1))
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(printf " FAIL ~a: got ~s expected ~s\n" label actual expected)))
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;; a record with ^double fields; the ctor must coerce an integer arg to a flonum.
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(evals "(defrecord V [^double x ^double y])")
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(check "ctor coerces ^double field to flonum" (flonum? (evals "(:x (->V 1 2))")) #t)
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(check "coerced field value matches" (evals "(:x (->V 1 2))") 1.0)
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(check "a flonum arg passes through" (evals "(:y (->V 1.5 2.5))") 2.5)
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;; dot is hintless; its caller passes V instances, so the fixpoint types a/b as V
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;; records, the ^double fields read :double, and the field-field arithmetic unboxes.
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(define dot (anode "(def dot (fn [a b] (+ (* (:x a) (:x b)) (* (:y a) (:y b)))))"))
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(define used (anode "(def used (fn [] (dot (->V 1.0 2.0) (->V 3.0 4.0))))"))
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(set-record-shapes! (chez-record-shapes-map))
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(set-protocol-methods! (jolt-hash-map))
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(wp-infer! (jolt-vector dot used))
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(set-optimize! #t)
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(define dot-emit (emit (run-passes dot (make-analyze-ctx "user"))))
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(check "field-field arithmetic unboxes to fl*" (contains-sub? dot-emit "fl*") #t)
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(check "field-field arithmetic unboxes to fl+" (contains-sub? dot-emit "fl+") #t)
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;; an UNTAGGED field stays generic — no fl-op (the read is :any, not :double).
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(evals "(defrecord W [p q])")
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(define dotw (anode "(def dotw (fn [a b] (* (:p a) (:p b))))"))
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(define usew (anode "(def usew (fn [] (dotw (->W 1.0 2.0) (->W 3.0 4.0))))"))
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(set-record-shapes! (chez-record-shapes-map))
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(wp-infer! (jolt-vector dotw usew))
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(check "untagged field stays generic (no fl*)"
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(contains-sub? (emit (run-passes dotw (make-analyze-ctx "user"))) "fl*") #f)
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(if (= fails 0)
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(begin (printf "fieldnum gate: ~a/~a passed\n" total total) (exit 0))
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(begin (printf "fieldnum gate: ~a/~a passed (~a failed)\n" (- total fails) total fails) (exit 1)))
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