30 lines
739 B
OCaml
30 lines
739 B
OCaml
open Obc
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open Obc_mapfold
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let is_deadcode = function
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| Aassgn (lhs, e) -> (* remove x=x equations *)
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(match e.e_desc with
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| Eextvalue w -> Obc_compare.compare_lhs_extvalue lhs w = 0
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| _ -> false
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)
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| Acase (_, []) -> true
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| Afor(_, _, _, { b_body = [] }) -> true
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| _ -> false
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let act funs act_list a =
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let a, _ = Obc_mapfold.act funs [] a in
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if is_deadcode a then
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a, act_list
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else
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a, a::act_list
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let block funs acc b =
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let _, act_list = Obc_mapfold.block funs [] b in
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{ b with b_body = List.rev act_list }, acc
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let program p =
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let funs = { Obc_mapfold.defaults with block = block; act = act } in
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let p, _ = Obc_mapfold.program_it funs [] p in
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p
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