1 ! Copyright (C) 2010 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors combinators combinators.short-circuit fry
4 kernel make math sequences
9 compiler.cfg.instructions
11 compiler.cfg.gvn.graph
12 compiler.cfg.gvn.rewrite ;
13 IN: compiler.cfg.gvn.alien
15 M: ##box-displaced-alien rewrite
16 dup displacement>> vreg>insn zero-insn?
17 [ [ dst>> ] [ base>> ] bi <copy> ] [ drop f ] if ;
19 ! ##box-displaced-alien f 1 2 3 <class>
20 ! ##unbox-c-ptr 4 1 <class>
22 ! ##box-displaced-alien f 1 2 3 <class>
23 ! ##unbox-c-ptr 5 3 <class>
26 : rewrite-unbox-alien ( insn box-insn -- insn )
27 [ dst>> ] [ src>> ] bi* <copy> ;
29 : rewrite-unbox-displaced-alien ( insn box-insn -- insns )
32 [ [ base>> ] [ base-class>> ] [ displacement>> ] tri ] bi*
37 ! XXX the vregs that src>> vreg>insn uses are not necessarily available
38 : rewrite-unbox-any-c-ptr ( insn -- insn/f )
41 { [ dup ##box-alien? ] [ rewrite-unbox-alien ] }
42 { [ dup ##box-displaced-alien? ] [ rewrite-unbox-displaced-alien ] }
46 M: ##unbox-any-c-ptr rewrite rewrite-unbox-any-c-ptr ;
48 M: ##unbox-alien rewrite rewrite-unbox-any-c-ptr ;
50 ! Fuse ##add-imm into ##load-memory(-imm) and ##store-memory(-imm)
51 ! just update the offset in the instruction
52 : fuse-base-offset? ( insn -- ? )
53 base>> vreg>insn ##add-imm? ;
55 ! XXX base>> vreg>insn src1>> not necessarily available
56 : fuse-base-offset ( insn -- insn' )
57 clone dup base>> vreg>insn
58 [ src1>> ] [ src2>> ] bi
59 [ >>base ] [ '[ _ + ] change-offset ] bi* ;
61 ! Fuse ##add-imm into ##load-memory and ##store-memory
62 ! just update the offset in the instruction
63 : fuse-displacement-offset? ( insn -- ? )
64 { [ scale>> 0 = ] [ displacement>> vreg>insn ##add-imm? ] } 1&& ;
66 ! XXX displacement>> vreg>insn src1>> not necessarily available
67 : fuse-displacement-offset ( insn -- insn' )
68 clone dup displacement>> vreg>insn
69 [ src1>> ] [ src2>> ] bi
70 [ >>displacement ] [ '[ _ + ] change-offset ] bi* ;
72 ! Fuse ##add into ##load-memory-imm and ##store-memory-imm
73 ! construct a new ##load-memory or ##store-memory with the
74 ! ##add's operand as the displacement
75 : fuse-displacement? ( insn -- ? )
77 [ offset>> 0 = complex-addressing? or ]
78 [ base>> vreg>insn ##add? ]
81 GENERIC: alien-insn-value ( insn -- value )
83 M: ##load-memory-imm alien-insn-value dst>> ;
84 M: ##store-memory-imm alien-insn-value src>> ;
86 GENERIC: new-alien-insn ( value base displacement scale offset rep c-type insn -- insn )
88 M: ##load-memory-imm new-alien-insn drop \ ##load-memory new-insn ;
89 M: ##store-memory-imm new-alien-insn drop \ ##store-memory new-insn ;
91 ! XXX base>> vreg>insn src1>> & src2>> not necessarily
93 : fuse-displacement ( insn -- insn' )
96 [ base>> vreg>insn [ src1>> ] [ src2>> ] bi ]
102 } cleave new-alien-insn ;
104 ! Fuse ##shl-imm into ##load-memory or ##store-memory
105 : scale-insn? ( insn -- ? )
106 { [ ##shl-imm? ] [ src2>> { 1 2 3 } member? ] } 1&& ;
108 : fuse-scale? ( insn -- ? )
109 { [ scale>> 0 = ] [ displacement>> vreg>insn scale-insn? ] } 1&& ;
111 ! XXX displacement>> vreg>insn src1>> not necessarily available
112 : fuse-scale ( insn -- insn' )
113 clone dup displacement>> vreg>insn
114 [ src1>> ] [ src2>> ] bi
115 [ >>displacement ] [ >>scale ] bi* ;
117 : rewrite-memory-op ( insn -- insn/f )
118 complex-addressing? [
120 { [ dup fuse-base-offset? ] [ fuse-base-offset ] }
121 { [ dup fuse-displacement-offset? ] [ fuse-displacement-offset ] }
122 { [ dup fuse-scale? ] [ fuse-scale ] }
127 : rewrite-memory-imm-op ( insn -- insn/f )
129 { [ dup fuse-base-offset? ] [ fuse-base-offset ] }
130 { [ dup fuse-displacement? ] [ fuse-displacement ] }
134 M: ##load-memory rewrite rewrite-memory-op ;
135 M: ##load-memory-imm rewrite rewrite-memory-imm-op ;
136 M: ##store-memory rewrite rewrite-memory-op ;
137 M: ##store-memory-imm rewrite rewrite-memory-imm-op ;