1 ! Copyright (C) 2008, 2009 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: kernel accessors combinators classes math layouts
4 sequences math.vectors.simd.intrinsics
5 compiler.cfg.instructions
6 compiler.cfg.value-numbering.graph
7 compiler.cfg.value-numbering.expressions ;
8 IN: compiler.cfg.value-numbering.simplify
10 ! Return value of f means we didn't simplify.
11 GENERIC: simplify* ( expr -- vn/expr/f )
13 M: copy-expr simplify* src>> ;
15 : simplify-unbox-alien ( expr -- vn/expr/f )
16 src>> vn>expr dup box-alien-expr? [ src>> ] [ drop f ] if ;
18 M: unbox-alien-expr simplify* simplify-unbox-alien ;
20 M: unbox-any-c-ptr-expr simplify* simplify-unbox-alien ;
22 : expr-zero? ( expr -- ? ) T{ constant-expr f 0 } = ; inline
24 : expr-one? ( expr -- ? ) T{ constant-expr f 1 } = ; inline
26 : expr-neg-one? ( expr -- ? ) T{ constant-expr f -1 } = ; inline
28 : >unary-expr< ( expr -- in ) src>> vn>expr ; inline
32 { [ dup neg-expr? ] [ src>> ] }
38 { [ dup not-expr? ] [ src>> ] }
42 : >binary-expr< ( expr -- in1 in2 )
43 [ src1>> vn>expr ] [ src2>> vn>expr ] bi ; inline
45 : simplify-add ( expr -- vn/expr/f )
47 { [ over expr-zero? ] [ nip ] }
48 { [ dup expr-zero? ] [ drop ] }
52 M: add-expr simplify* simplify-add ;
53 M: add-imm-expr simplify* simplify-add ;
55 : simplify-sub ( expr -- vn/expr/f )
57 { [ dup expr-zero? ] [ drop ] }
61 M: sub-expr simplify* simplify-sub ;
62 M: sub-imm-expr simplify* simplify-sub ;
64 : simplify-mul ( expr -- vn/expr/f )
66 { [ over expr-one? ] [ drop ] }
67 { [ dup expr-one? ] [ drop ] }
71 M: mul-expr simplify* simplify-mul ;
72 M: mul-imm-expr simplify* simplify-mul ;
74 : simplify-and ( expr -- vn/expr/f )
76 { [ 2dup eq? ] [ drop ] }
80 M: and-expr simplify* simplify-and ;
81 M: and-imm-expr simplify* simplify-and ;
83 : simplify-or ( expr -- vn/expr/f )
85 { [ 2dup eq? ] [ drop ] }
86 { [ over expr-zero? ] [ nip ] }
87 { [ dup expr-zero? ] [ drop ] }
91 M: or-expr simplify* simplify-or ;
92 M: or-imm-expr simplify* simplify-or ;
94 : simplify-xor ( expr -- vn/expr/f )
96 { [ over expr-zero? ] [ nip ] }
97 { [ dup expr-zero? ] [ drop ] }
101 M: xor-expr simplify* simplify-xor ;
102 M: xor-imm-expr simplify* simplify-xor ;
104 : useless-shr? ( in1 in2 -- ? )
106 [ [ src2>> ] [ expr>vn ] bi* = ] [ 2drop f ] if ; inline
108 : simplify-shr ( expr -- vn/expr/f )
110 { [ 2dup useless-shr? ] [ drop src1>> ] }
111 { [ dup expr-zero? ] [ drop ] }
115 M: shr-expr simplify* simplify-shr ;
116 M: shr-imm-expr simplify* simplify-shr ;
118 : simplify-shl ( expr -- vn/expr/f )
120 { [ dup expr-zero? ] [ drop ] }
124 M: shl-expr simplify* simplify-shl ;
125 M: shl-imm-expr simplify* simplify-shl ;
127 M: box-displaced-alien-expr simplify*
128 [ base>> ] [ displacement>> ] bi {
129 { [ dup vn>expr expr-zero? ] [ drop ] }
133 M: scalar>vector-expr simplify*
135 { [ dup vector>scalar-expr? ] [ src>> ] }
139 M: shuffle-vector-imm-expr simplify*
140 [ src>> ] [ shuffle>> ] [ rep>> rep-components iota ] tri
141 sequence= [ drop f ] unless ;
143 M: expr simplify* drop f ;
145 : simplify ( expr -- vn )
147 { [ dup not ] [ drop expr>vn ] }
148 { [ dup expr? ] [ expr>vn nip ] }
149 { [ dup integer? ] [ nip ] }
152 : number-values ( insn -- )
153 [ >expr simplify ] [ dst>> ] bi set-vn ;