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Issue #172 - Allow inline but check for (set!)'s first

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Justin Ethier 2018-11-09 12:53:47 -05:00
parent b50d7360e0
commit 915ae74fe1
1 changed files with 22 additions and 6 deletions
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28
scheme/cyclone/cps-optimizations.sld
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@ -54,6 +54,8 @@
adbv:set-global!
adbv:defined-by
adbv:set-defined-by!
adbv:mutated-by-set?
adbv:set-mutated-by-set!
adbv:reassigned?
adbv:set-reassigned!
adbv:assigned-value
@ -131,6 +133,7 @@
defines-lambda-id
const const-value
ref-count ref-by
mutated-by-set
reassigned assigned-value
app-fnc-count app-arg-count
inlinable mutated-indirectly
@ -148,6 +151,7 @@
(const-value adbv:const-value adbv:set-const-value!)
(ref-count adbv:ref-count adbv:set-ref-count!)
(ref-by adbv:ref-by adbv:set-ref-by!)
(mutated-by-set adbv:mutated-by-set? adbv:set-mutated-by-set!)
;; TODO: need to set reassigned flag if variable is SET, however there is at least
;; one exception for local define's, which are initialized to #f and then assigned
;; a single time via set
@ -205,6 +209,7 @@
#f ; const-value
0 ; ref-count
'() ; ref-by
#f ; mutated-by-set
#f ; reassigned
#f ; assigned-value
0 ; app-fnc-count
@ -556,6 +561,7 @@
(with-var! (set!->var exp) (lambda (var)
(if (adbv:assigned-value var)
(adbv:set-reassigned! var #t))
(adbv:set-mutated-by-set! var #t)
(adbv-set-assigned-value-helper! (set!->var exp) var (set!->exp exp))
(adbv:set-ref-count! var (+ 1 (adbv:ref-count var)))
(adbv:set-ref-by! var (cons lid (adbv:ref-by var)))
@ -989,11 +995,7 @@
(cdr exp)
(ast:lambda-formals->list (car exp)))
(or
; Issue #172 - Cannot assume that just because a primitive
; deals with immutable objects that it is safe to inline.
; A (set!) could still mutate variables the primitive is
; using, causing invalid behavior.
;(prim-calls-inlinable? (cdr exp))
(prim-calls-inlinable? (cdr exp))
;; Testing - every arg only used once
;(and
@ -1166,7 +1168,21 @@
(define (prim-calls-inlinable? prim-calls)
(every
(lambda (prim-call)
(prim:immutable-args/result? (car prim-call)))
(and
(prim:immutable-args/result? (car prim-call))
; Issue #172 - Cannot assume that just because a primitive
; deals with immutable objects that it is safe to inline.
; A (set!) could still mutate variables the primitive is
; using, causing invalid behavior.
;
; So, make sure none of the args is mutated via (set!)
(every
(lambda (arg)
(or (not (ref? arg))
(with-var arg (lambda (var)
(not (adbv:mutated-by-set? var))))))
(cdr prim-call)))
)
prim-calls))
;; Check each pair of primitive call / corresponding lambda arg,