1 ! Copyright (C) 2004, 2008 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: arrays generic assocs inference inference.class
4 inference.dataflow inference.backend inference.state io kernel
5 math namespaces sequences vectors words quotations hashtables
6 combinators classes classes.algebra generic.math
7 optimizer.math.partial continuations optimizer.def-use
8 optimizer.backend generic.standard optimizer.specializers
9 optimizer.def-use optimizer.pattern-match generic.standard
10 optimizer.control kernel.private ;
11 IN: optimizer.inlining
13 : remember-inlining ( node history -- )
14 [ swap set-node-history ] curry each-node ;
16 : inlining-quot ( node quot -- node )
17 over node-in-d dataflow-with
18 dup rot infer-classes/node ;
20 : splice-quot ( #call quot history -- node )
21 #! Must add history *before* splicing in, otherwise
22 #! the rest of the IR will also remember the history
23 pick node-history append
24 >r dupd inlining-quot dup r> remember-inlining
27 ! A heuristic to avoid excessive inlining
30 : word-flat-length ( word -- n )
32 ! heuristic: { ... } declare comes up in method bodies
33 ! and we don't care about it
34 { [ dup \ declare eq? ] [ drop -2 ] }
36 { [ dup get ] [ drop 1 ] }
38 { [ dup inline? not ] [ drop 1 ] }
40 [ dup dup set word-def (flat-length) ]
43 : (flat-length) ( seq -- n )
46 { [ dup quotation? ] [ (flat-length) 1+ ] }
47 { [ dup array? ] [ (flat-length) ] }
48 { [ dup word? ] [ word-flat-length ] }
53 : flat-length ( seq -- n )
54 [ word-def (flat-length) ] with-scope ;
56 ! Single dispatch method inlining optimization
57 : node-class# ( node n -- class )
58 over node-in-d <reversed> ?nth node-class ;
60 : dispatching-class ( node word -- class )
61 [ dispatch# node-class# ] keep specific-method ;
63 : inline-standard-method ( node word -- node )
64 2dup dispatching-class dup [
65 over +inlined+ depends-on
66 swap method 1quotation f splice-quot
71 ! Partial dispatch of math-generic words
72 : normalize-math-class ( class -- class' )
80 } [ class<= ] with find nip ;
82 : inlining-math-method ( #call word -- quot/f )
83 swap node-input-classes
84 [ first normalize-math-class ]
85 [ second normalize-math-class ] bi
86 3dup math-both-known? [ math-method* ] [ 3drop f ] if ;
88 : inline-math-method ( #call word -- node/t )
89 [ drop ] [ inlining-math-method ] 2bi
90 dup [ f splice-quot ] [ 2drop t ] if ;
92 : inline-math-partial ( #call word -- node/t )
95 "derived-from" word-prop first
96 inlining-math-method dup
98 [ nip 1quotation ] 2tri
99 [ = not ] [ drop ] 2bi and
100 [ f splice-quot ] [ 2drop t ] if ;
102 : inline-method ( #call -- node )
104 { [ dup standard-generic? ] [ inline-standard-method ] }
105 { [ dup math-generic? ] [ inline-math-method ] }
106 { [ dup math-partial? ] [ inline-math-partial ] }
110 ! Resolve type checks at compile time where possible
111 : comparable? ( actual testing -- ? )
112 #! If actual is a subset of testing or if the two classes
113 #! are disjoint, return t.
114 2dup class<= >r classes-intersect? not r> or ;
116 : optimize-predicate? ( #call -- ? )
117 dup node-param "predicating" word-prop dup [
118 >r node-class-first r> comparable?
123 : literal-quot ( node literals -- quot )
124 #! Outputs a quotation which drops the node's inputs, and
125 #! pushes some literals.
126 >r node-in-d length \ drop <repetition>
127 r> [ literalize ] map append >quotation ;
129 : inline-literals ( node literals -- node )
130 #! Make #shuffle -> #push -> #return -> successor
131 dupd literal-quot f splice-quot ;
133 : evaluate-predicate ( #call -- ? )
134 dup node-param "predicating" word-prop >r
135 node-class-first r> class<= ;
137 : optimize-predicate ( #call -- node )
138 #! If the predicate is followed by a branch we fold it
140 dup evaluate-predicate swap
141 dup node-successor #if? [
143 node-successor swap 0 1 ? fold-branch
144 r> [ set-node-successor ] keep
146 swap 1array inline-literals
149 : optimizer-hooks ( node -- conditions )
150 node-param "optimizer-hooks" word-prop ;
152 : optimizer-hook ( node -- pair/f )
153 dup optimizer-hooks [ first call ] find 2nip ;
155 : optimize-hook ( node -- )
156 dup optimizer-hook second call ;
158 : define-optimizers ( word optimizers -- )
159 "optimizer-hooks" set-word-prop ;
161 : flush-eval? ( #call -- ? )
162 dup node-param "flushable" word-prop [
163 node-out-d [ unused? ] all?
168 : flush-eval ( #call -- node )
169 dup node-param +inlined+ depends-on
170 dup node-out-d length f <repetition> inline-literals ;
172 : partial-eval? ( #call -- ? )
173 dup node-param "foldable" word-prop [
174 dup node-in-d [ node-literal? ] with all?
179 : literal-in-d ( #call -- inputs )
180 dup node-in-d [ node-literal ] with map ;
182 : partial-eval ( #call -- node )
183 dup node-param +inlined+ depends-on
184 dup literal-in-d over node-param 1quotation
185 [ with-datastack inline-literals ] [ 2drop 2drop t ] recover ;
187 : define-identities ( words identities -- )
188 [ "identities" set-word-prop ] curry each ;
190 : find-identity ( node -- quot )
191 [ node-param "identities" word-prop ] keep
192 [ swap first in-d-match? ] curry find
193 nip dup [ second ] when ;
195 : apply-identities ( node -- node/f )
196 dup find-identity f splice-quot ;
198 : optimistic-inline? ( #call -- ? )
199 dup node-param "specializer" word-prop dup [
200 >r node-input-classes r> specialized-length tail*
201 [ class-types length 1 = ] all?
206 : splice-word-def ( #call word -- node )
207 dup +inlined+ depends-on
208 dup word-def swap 1array splice-quot ;
210 : optimistic-inline ( #call -- node )
211 dup node-param over node-history memq? [
214 dup node-param splice-word-def
217 : method-body-inline? ( #call -- ? )
218 node-param dup method-body?
219 [ flat-length 10 <= ] [ drop f ] if ;
221 M: #call optimize-node*
223 { [ dup flush-eval? ] [ flush-eval ] }
224 { [ dup partial-eval? ] [ partial-eval ] }
225 { [ dup find-identity ] [ apply-identities ] }
226 { [ dup optimizer-hook ] [ optimize-hook ] }
227 { [ dup optimize-predicate? ] [ optimize-predicate ] }
228 { [ dup optimistic-inline? ] [ optimistic-inline ] }
229 { [ dup method-body-inline? ] [ optimistic-inline ] }