[sledge] Remove unused Llair.ignore_result

Summary: No longer needed due to blocks not taking parameters.

Reviewed By: jvillard

Differential Revision: D16914858

fbshipit-source-id: 24b1106ac

sledge/src/llair/frontend.ml

@@ -927,7 +927,7 @@ let xlate_instr :
             let areturn = xlate_name_opt instr in
             let return = Llair.Jump.mk lbl in
             Llair.Term.call ~func ~typ ~args ~areturn ~return ~throw:None
-              ~ignore_result:false ~loc
+              ~loc
           in
           continue (fun (insts, term) ->
               let cmnd = Vector.of_list insts in
@@ -988,15 +988,8 @@ let xlate_instr :
           let return, blocks = xlate_jump x instr return_blk loc [] in
           let throw, blocks = xlate_jump x instr unwind_blk loc blocks in
           let throw = Some throw in
-          let ignore_result =
-            match typ with
-            | Pointer {elt= Function {return= Some _}} ->
-                Option.is_none (Llvm.use_begin instr)
-            | _ -> false
-          in
           emit_term
-            (Llair.Term.call ~func ~typ ~args ~areturn ~return ~throw
-               ~ignore_result ~loc)
+            (Llair.Term.call ~func ~typ ~args ~areturn ~return ~throw ~loc)
             ~blocks )
   | Ret ->
       let exp =

sledge/src/llair/llair.ml

@@ -34,7 +34,6 @@ and 'a call =
   ; areturn: Var.t option
   ; return: jump
   ; throw: jump option
-  ; ignore_result: bool
   ; mutable recursive: bool
   ; loc: Loc.t }
 
@@ -82,16 +81,7 @@ let sexp_of_term = function
           {key: Exp.t; tbl: (Exp.t * jump) vector; els: jump; loc: Loc.t}]
   | Iswitch {ptr; tbl; loc} ->
       sexp_ctor "Iswitch" [%sexp {ptr: Exp.t; tbl: jump vector; loc: Loc.t}]
-  | Call
-      { callee
-      ; typ
-      ; args
-      ; areturn
-      ; return
-      ; throw
-      ; ignore_result
-      ; recursive
-      ; loc } ->
+  | Call {callee; typ; args; areturn; return; throw; recursive; loc} ->
       sexp_ctor "Call"
         [%sexp
           { callee: Exp.t
@@ -100,7 +90,6 @@ let sexp_of_term = function
           ; areturn: Var.t option
           ; return: jump
           ; throw: jump option
-          ; ignore_result: bool
           ; recursive: bool
           ; loc: Loc.t }]
   | Return {exp; loc} ->
@@ -334,7 +323,7 @@ module Term = struct
 
   let iswitch ~ptr ~tbl ~loc = Iswitch {ptr; tbl; loc} |> check invariant
 
-  let call ~func ~typ ~args ~areturn ~return ~throw ~ignore_result ~loc =
+  let call ~func ~typ ~args ~areturn ~return ~throw ~loc =
     Call
       { callee= func
       ; typ
@@ -342,7 +331,6 @@ module Term = struct
       ; areturn
       ; return
       ; throw
-      ; ignore_result
       ; recursive= false
       ; loc }
     |> check invariant

sledge/src/llair/llair.mli

@@ -52,7 +52,6 @@ and 'a call =
   ; areturn: Var.t option  (** Register to receive return value. *)
   ; return: jump  (** Return destination. *)
   ; throw: jump option  (** Handler destination. *)
-  ; ignore_result: bool  (** Drop return value when invoking return. *)
   ; mutable recursive: bool
         (** Holds unless [callee] is definitely not recursive. *)
   ; loc: Loc.t }
@@ -157,7 +156,6 @@ module Term : sig
     -> areturn:Var.t option
     -> return:jump
     -> throw:jump option
-    -> ignore_result:bool
     -> loc:Loc.t
     -> term