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[smlnj] Annotation of /sml/trunk/src/MLRISC/gc-safety/gc-props.sig
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Annotation of /sml/trunk/src/MLRISC/gc-safety/gc-props.sig

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1 : monnier 427 (*
2 :     * This is the abstract interface for propagating gc info from an
3 :     * instruction set.
4 :     *)
5 :    
6 :     signature GC_PROPERTIES =
7 :     sig
8 :    
9 :     structure I : INSTRUCTIONS
10 :     structure GC : GC_TYPE
11 :    
12 :     (*
13 :     * This function is responsible for propagating gc type information
14 :     * from the input operands to the output operands of an instruction.
15 :     * The propagation is performed conservatively; that is, when in doubt,
16 :     * we leave the gc-type unspecified.
17 :     *)
18 :    
19 :     val propagate : { lookup : I.C.cell -> GC.gctype,
20 :     update : I.C.cell * GC.gctype -> unit
21 :     } -> I.instruction -> unit
22 :    
23 :     end

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