From 84cb73abe0f777521ee67cec2405c9593420d3da Mon Sep 17 00:00:00 2001
From: xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e>
Date: Wed, 17 Aug 2011 13:34:12 +0000
Subject: Factor out bind_lvalue

git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1715 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
---
 cparser/Bitfields.ml    | 24 ++----------------------
 cparser/StructAssign.ml | 19 -------------------
 cparser/Transform.ml    | 18 ++++++++++++++++++
 3 files changed, 20 insertions(+), 41 deletions(-)

(limited to 'cparser')

diff --git a/cparser/Bitfields.ml b/cparser/Bitfields.ml
index 5ab4eb4..ff4c0c6 100644
--- a/cparser/Bitfields.ml
+++ b/cparser/Bitfields.ml
@@ -15,8 +15,8 @@
 
 (* Elimination of bit fields in structs *)
 
-(* Assumes: unblocked, simplified code.
-   Preserves: unblocked, simplified code. *)
+(* Assumes: unblocked code.
+   Preserves: unblocked code. *)
 
 open Printf
 open Machine
@@ -201,26 +201,6 @@ let bitfield_assign bf carrier newval =
   {edesc = EBinop(Oor,  oldval_masked, newval_masked,  TInt(IUInt,[]));
    etyp =  TInt(IUInt,[])}
 
-(* Detect invariant l-values *)
-
-let rec invariant_lvalue e =
-  match e.edesc with
-  | EVar _ -> true
-  | EUnop(Oderef, {edesc = EVar _}) -> true   (* to check *)
-  | EUnop(Odot _, e1) -> invariant_lvalue e1
-  | _ -> false
-
-(* Bind a l-value to a temporary variable if it is not invariant. *)
-
-let bind_lvalue e fn =
-  if invariant_lvalue e then
-    fn e
-  else begin
-    let tmp = new_temp (TPtr(e.etyp, [])) in
-    ecomma (eassign tmp (eaddrof e))
-           (fn {edesc = EUnop(Oderef, tmp); etyp = e.etyp})
-  end
-
 (* Transformation of operators *)
 
 let op_for_incr_decr = function
diff --git a/cparser/StructAssign.ml b/cparser/StructAssign.ml
index a9c5091..5c989a3 100644
--- a/cparser/StructAssign.ml
+++ b/cparser/StructAssign.ml
@@ -93,25 +93,6 @@ let transf_assign env lhs rhs =
     else [e_lhs; e_rhs; e_size] in
   {edesc = ECall(memcpy, args); etyp = TVoid[]}
 
-(* Detect invariant l-values *)
-
-let rec invariant_lvalue env e =
-  match e.edesc with
-  | EVar _ -> true
-  | EUnop(Odot _, e1) -> invariant_lvalue env e1
-  | _ -> false
-
-(* Bind a l-value to a temporary variable if it is not invariant. *)
-
-let bind_lvalue env e fn =
-  if invariant_lvalue env e then
-    fn e
-  else begin
-    let tmp = new_temp (TPtr(e.etyp, [])) in
-    ecomma (eassign tmp (addrof e))
-           (fn {edesc = EUnop(Oderef, tmp); etyp = e.etyp})
-  end
-
 (* Transformation of expressions. *)
 
 type context = Val | Effects
diff --git a/cparser/Transform.ml b/cparser/Transform.ml
index 4fd83ae..1cafaba 100644
--- a/cparser/Transform.ml
+++ b/cparser/Transform.ml
@@ -40,6 +40,24 @@ let get_temps () =
   temporaries := [];
   List.rev temps
 
+(* Bind a l-value to a temporary variable if it is not invariant. *)
+
+let rec invariant_lvalue env e =
+  match e.edesc with
+  | EVar _ -> true
+  | EUnop(Odot _, e1) -> invariant_lvalue env e1
+  | _ -> false
+
+let bind_lvalue env e fn =
+  if invariant_lvalue env e then
+    fn e
+  else begin
+    let tmp = new_temp (TPtr(e.etyp, [])) in
+    ecomma (eassign tmp (addrof e))
+           (fn {edesc = EUnop(Oderef, tmp); etyp = e.etyp})
+  end
+
+
 (* Generic transformation *)
 
 let program
-- 
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