diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c4706588ba7..59a16bbdf63 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2013-01-13  Jakub Jelinek  <jakub@redhat.com>
+
+	PR fortran/55935
+	* gimple-fold.c (get_symbol_constant_value): Call
+	unshare_expr.
+	(fold_gimple_assign): Don't call unshare_expr here.
+	(fold_ctor_reference): Call unshare_expr.
+
 2013-01-13  Terry Guo  <terry.guo@arm.com>
 
 	* gcc/Makefile.in (s-mlib): New argument MULTILIB_REUSE.
@@ -57,7 +65,7 @@
 
 2013-01-10  Vladimir Makarov  <vmakarov@redhat.com>
 
-	PR rtl-optimization/pr55672
+	PR rtl-optimization/55672
 	* lra-eliminations.c (mark_not_eliminable): Permit addition with
 	const to be eliminable.
 
diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 92b8083dfce..0f62c2aa54d 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,9 @@
+2013-01-13  Jakub Jelinek  <jakub@redhat.com>
+
+	PR fortran/55935
+	* trans-expr.c (gfc_conv_structure): Call
+	unshare_expr_without_location on the ctor elements.
+
 2013-01-13  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/54286
diff --git a/gcc/fortran/trans-expr.c b/gcc/fortran/trans-expr.c
index cad772f1cbd..e3386b18a29 100644
--- a/gcc/fortran/trans-expr.c
+++ b/gcc/fortran/trans-expr.c
@@ -6137,6 +6137,7 @@ gfc_conv_structure (gfc_se * se, gfc_expr * expr, int init)
 	  gfc_symbol *vtabs;
 	  vtabs = cm->initializer->symtree->n.sym;
 	  vtab = gfc_build_addr_expr (NULL_TREE, gfc_get_symbol_decl (vtabs));
+	  vtab = unshare_expr_without_location (vtab);
 	  CONSTRUCTOR_APPEND_ELT (v, cm->backend_decl, vtab);
 	}
       else if (cm->ts.u.derived && strcmp (cm->name, "_size") == 0)
@@ -6150,6 +6151,7 @@ gfc_conv_structure (gfc_se * se, gfc_expr * expr, int init)
 				      TREE_TYPE (cm->backend_decl),
 				      cm->attr.dimension, cm->attr.pointer,
 				      cm->attr.proc_pointer);
+	  val = unshare_expr_without_location (val);
 
 	  /* Append it to the constructor list.  */
 	  CONSTRUCTOR_APPEND_ELT (v, cm->backend_decl, val);
diff --git a/gcc/gimple-fold.c b/gcc/gimple-fold.c
index 6d38122b595..b9211a9add2 100644
--- a/gcc/gimple-fold.c
+++ b/gcc/gimple-fold.c
@@ -202,7 +202,7 @@ get_symbol_constant_value (tree sym)
       tree val = DECL_INITIAL (sym);
       if (val)
 	{
-	  val = canonicalize_constructor_val (val, sym);
+	  val = canonicalize_constructor_val (unshare_expr (val), sym);
 	  if (val && is_gimple_min_invariant (val))
 	    return val;
 	  else
@@ -378,7 +378,7 @@ fold_gimple_assign (gimple_stmt_iterator *si)
 	  }
 
 	else if (DECL_P (rhs))
-	  return unshare_expr (get_symbol_constant_value (rhs));
+	  return get_symbol_constant_value (rhs);
 
         /* If we couldn't fold the RHS, hand over to the generic
            fold routines.  */
@@ -2941,7 +2941,7 @@ fold_ctor_reference (tree type, tree ctor, unsigned HOST_WIDE_INT offset,
   /* We found the field with exact match.  */
   if (useless_type_conversion_p (type, TREE_TYPE (ctor))
       && !offset)
-    return canonicalize_constructor_val (ctor, from_decl);
+    return canonicalize_constructor_val (unshare_expr (ctor), from_decl);
 
   /* We are at the end of walk, see if we can view convert the
      result.  */
@@ -2950,7 +2950,7 @@ fold_ctor_reference (tree type, tree ctor, unsigned HOST_WIDE_INT offset,
       && operand_equal_p (TYPE_SIZE (type),
 			  TYPE_SIZE (TREE_TYPE (ctor)), 0))
     {
-      ret = canonicalize_constructor_val (ctor, from_decl);
+      ret = canonicalize_constructor_val (unshare_expr (ctor), from_decl);
       ret = fold_unary (VIEW_CONVERT_EXPR, type, ret);
       if (ret)
 	STRIP_NOPS (ret);