51 lines
1.9 KiB
OCaml
51 lines
1.9 KiB
OCaml
(**************************************************************************)
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(* *)
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(* OCaml *)
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(* *)
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(* Xavier Leroy, projet Gallium, INRIA Rocquencourt *)
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(* *)
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(* Copyright 2014 Institut National de Recherche en Informatique et *)
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(* en Automatique. *)
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(* *)
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(* All rights reserved. This file is distributed under the terms of *)
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(* the GNU Lesser General Public License version 2.1, with the *)
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(* special exception on linking described in the file LICENSE. *)
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(* *)
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(**************************************************************************)
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(* CSE for the i386 *)
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open Cmm
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open Arch
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open Mach
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open CSEgen
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class cse = object
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inherit cse_generic as super
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method! class_of_operation op =
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match op with
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(* Operations that affect the floating-point stack cannot be factored *)
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| Iconst_float _ | Inegf | Iabsf | Iaddf | Isubf | Imulf | Idivf
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| Iintoffloat | Ifloatofint
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| Iload((Single | Double | Double_u), _) -> Op_other
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(* Specific ops *)
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| Ispecific(Ilea _) -> Op_pure
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| Ispecific(Istore_int(_, _, is_asg)) -> Op_store is_asg
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| Ispecific(Istore_symbol(_, _, is_asg)) -> Op_store is_asg
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| Ispecific(Ioffset_loc(_, _)) -> Op_store true
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| Ispecific _ -> Op_other
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| _ -> super#class_of_operation op
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method! is_cheap_operation op =
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match op with
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| Iconst_int _ -> true
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| Iconst_symbol _ -> true
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| _ -> false
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end
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let fundecl f =
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(new cse)#fundecl f
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