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clean up value numbering conversion of ##add/sub to ##add/sub-imm

db4
Doug Coleman 2009-07-13 19:02:05 -05:00
parent 3b244d5d41
commit ccae9b59a4
1 changed files with 18 additions and 10 deletions
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28
basis/compiler/cfg/value-numbering/rewrite/rewrite.factor
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@ -49,9 +49,12 @@ M: insn rewrite ;
[ src2>> tag-mask get bitand 0 = ]
} 1&& ; inline
: tagged>constant ( n -- n' )
tag-bits get neg shift ; inline
: (rewrite-tagged-comparison) ( insn -- src1 src2 cc )
[ src1>> vreg>expr in1>> vn>vreg ]
[ src2>> tag-bits get neg shift ]
[ src2>> tagged>constant ]
[ cc>> ]
tri ; inline
@ -203,15 +206,20 @@ M: ##or-imm rewrite [ bitor ] \ ##or-imm combine-imm ;
M: ##xor-imm rewrite [ bitxor ] \ ##xor-imm combine-imm ;
: rewrite-add? ( insn -- ? )
src2>> vreg-small-constant? ;
M: ##add rewrite
dup rewrite-add? [
: new-arithmetic ( obj op -- )
[
[ dst>> ]
[ src1>> ]
[ src2>> vreg>constant ] tri \ ##add-imm new-insn
dup number-values
] when ;
[ src2>> vreg>constant ] tri
] dip new-insn dup number-values ; inline
M: ##sub rewrite constant-fold ;
: rewrite-arithmetic ( insn op -- ? )
over src2>> vreg-small-constant? [
new-arithmetic constant-fold
] [
drop
] if ; inline
M: ##add rewrite \ ##add-imm rewrite-arithmetic ;
M: ##sub rewrite \ ##sub-imm rewrite-arithmetic ;