1 files changed, 263 insertions, 0 deletions
diff --git a/gcc/cp/cp-objcp-common.c b/gcc/cp/cp-objcp-common.c
new file mode 100644
index 0000000..f40be96
--- /dev/null
+++ b/gcc/cp/cp-objcp-common.c
@@ -0,0 +1,263 @@
+/* Some code common to C++ and ObjC++ front ends.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+   Contributed by Ziemowit Laski  <zlaski@apple.com>
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING.  If not, write to the Free
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "cp-tree.h"
+#include "c-common.h"
+#include "toplev.h"
+#include "langhooks.h"
+#include "langhooks-def.h"
+#include "diagnostic.h"
+#include "debug.h"
+#include "cxx-pretty-print.h"
+#include "cp-objcp-common.h"
+
+/* Special routine to get the alias set for C++.  */
+
+HOST_WIDE_INT
+cxx_get_alias_set (tree t)
+{
+  if (IS_FAKE_BASE_TYPE (t))
+    /* The base variant of a type must be in the same alias set as the
+       complete type.  */
+    return get_alias_set (TYPE_CONTEXT (t));
+
+  /* Punt on PMFs until we canonicalize functions properly.  */
+  if (TYPE_PTRMEMFUNC_P (t))
+    return 0;
+
+  return c_common_get_alias_set (t);
+}
+
+/* Called from check_global_declarations.  */
+
+bool
+cxx_warn_unused_global_decl (tree decl)
+{
+  if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
+    return false;
+  if (DECL_IN_SYSTEM_HEADER (decl))
+    return false;
+
+  /* Const variables take the place of #defines in C++.  */
+  if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
+    return false;
+
+  return true;
+}
+
+/* Langhook for expr_size: Tell the backend that the value of an expression
+   of non-POD class type does not include any tail padding; a derived class
+   might have allocated something there.  */
+
+tree
+cp_expr_size (tree exp)
+{
+  tree type = TREE_TYPE (exp);
+
+  if (CLASS_TYPE_P (type))
+    {
+      /* The backend should not be interested in the size of an expression
+	 of a type with both of these set; all copies of such types must go
+	 through a constructor or assignment op.  */
+      gcc_assert (!TYPE_HAS_COMPLEX_INIT_REF (type)
+		  || !TYPE_HAS_COMPLEX_ASSIGN_REF (type)
+		  /* But storing a CONSTRUCTOR isn't a copy.  */
+		  || TREE_CODE (exp) == CONSTRUCTOR
+		  /* And, the gimplifier will sometimes make a copy of
+		     an aggregate.  In particular, for a case like:
+
+			struct S { S(); };
+			struct X { int a; S s; };
+			X x = { 0 };
+
+		     the gimplifier will create a temporary with
+		     static storage duration, perform static
+		     initialization of the temporary, and then copy
+		     the result.  Since the "s" subobject is never
+		     constructed, this is a valid transformation.  */
+		  || CP_AGGREGATE_TYPE_P (type));
+
+      /* This would be wrong for a type with virtual bases, but they are
+	 caught by the assert above.  */
+      return (is_empty_class (type)
+	      ? size_zero_node
+	      : CLASSTYPE_SIZE_UNIT (type));
+    }
+  else
+    /* Use the default code.  */
+    return lhd_expr_size (exp);
+}
+
+/* Langhook for tree_size: determine size of our 'x' and 'c' nodes.  */
+size_t
+cp_tree_size (enum tree_code code)
+{
+  switch (code)
+    {
+    case TINST_LEVEL:		return sizeof (struct tinst_level_s);
+    case PTRMEM_CST:		return sizeof (struct ptrmem_cst);
+    case BASELINK:		return sizeof (struct tree_baselink);
+    case TEMPLATE_PARM_INDEX:	return sizeof (template_parm_index);
+    case DEFAULT_ARG:		return sizeof (struct tree_default_arg);
+    case OVERLOAD:		return sizeof (struct tree_overload);
+    default:
+      gcc_unreachable ();
+    }
+  /* NOTREACHED */
+}
+
+/* Returns true if T is a variably modified type, in the sense of C99.
+   FN is as passed to variably_modified_p.
+   This routine needs only check cases that cannot be handled by the
+   language-independent logic in tree.c.  */
+
+bool
+cp_var_mod_type_p (tree type, tree fn)
+{
+  /* If TYPE is a pointer-to-member, it is variably modified if either
+     the class or the member are variably modified.  */
+  if (TYPE_PTR_TO_MEMBER_P (type))
+    return (variably_modified_type_p (TYPE_PTRMEM_CLASS_TYPE (type), fn)
+	    || variably_modified_type_p (TYPE_PTRMEM_POINTED_TO_TYPE (type),
+					 fn));
+
+  /* All other types are not variably modified.  */
+  return false;
+}
+
+/* Construct a C++-aware pretty-printer for CONTEXT.  It is assumed
+   that CONTEXT->printer is an already constructed basic pretty_printer.  */
+void
+cxx_initialize_diagnostics (diagnostic_context *context)
+{
+  pretty_printer *base = context->printer;
+  cxx_pretty_printer *pp = XNEW (cxx_pretty_printer);
+  memcpy (pp_base (pp), base, sizeof (pretty_printer));
+  pp_cxx_pretty_printer_init (pp);
+  context->printer = (pretty_printer *) pp;
+
+  /* It is safe to free this object because it was previously malloc()'d.  */
+  free (base);
+}
+
+/* This compares two types for equivalence ("compatible" in C-based languages).
+   This routine should only return 1 if it is sure.  It should not be used
+   in contexts where erroneously returning 0 causes problems.  */
+
+int
+cxx_types_compatible_p (tree x, tree y)
+{
+  if (same_type_ignoring_top_level_qualifiers_p (x, y))
+    return 1;
+
+  /* Once we get to the middle-end, references and pointers are
+     interchangeable.  FIXME should we try to replace all references with
+     pointers?  */
+  if (POINTER_TYPE_P (x) && POINTER_TYPE_P (y)
+      && TYPE_MODE (x) == TYPE_MODE (y)
+      && TYPE_REF_CAN_ALIAS_ALL (x) == TYPE_REF_CAN_ALIAS_ALL (y)
+      && same_type_p (TREE_TYPE (x), TREE_TYPE (y)))
+    return 1;
+
+  return 0;
+}
+
+tree
+cxx_staticp (tree arg)
+{
+  switch (TREE_CODE (arg))
+    {
+    case BASELINK:
+      return staticp (BASELINK_FUNCTIONS (arg));
+
+    default:
+      break;
+    }
+  
+  return NULL_TREE;
+}
+
+/* Stubs to keep c-opts.c happy.  */
+void
+push_file_scope (void)
+{
+}
+
+void
+pop_file_scope (void)
+{
+}
+
+/* c-pragma.c needs to query whether a decl has extern "C" linkage.  */
+bool
+has_c_linkage (tree decl)
+{
+  return DECL_EXTERN_C_P (decl);
+}
+
+static GTY ((if_marked ("tree_map_marked_p"), param_is (struct tree_map)))
+     htab_t shadowed_var_for_decl;
+
+/* Lookup a shadowed var for FROM, and return it if we find one.  */
+
+tree
+decl_shadowed_for_var_lookup (tree from)
+{
+  struct tree_map *h, in;
+  in.from = from;
+
+  h = (struct tree_map *) htab_find_with_hash (shadowed_var_for_decl, &in,
+					       htab_hash_pointer (from));
+  if (h)
+    return h->to;
+  return NULL_TREE;
+}
+
+/* Insert a mapping FROM->TO in the shadowed var hashtable.  */
+
+void
+decl_shadowed_for_var_insert (tree from, tree to)
+{
+  struct tree_map *h;
+  void **loc;
+
+  h = GGC_NEW (struct tree_map);
+  h->hash = htab_hash_pointer (from);
+  h->from = from;
+  h->to = to;
+  loc = htab_find_slot_with_hash (shadowed_var_for_decl, h, h->hash, INSERT);
+  *(struct tree_map **) loc = h;
+}
+
+void
+init_shadowed_var_for_decl (void)
+{
+  shadowed_var_for_decl = htab_create_ggc (512, tree_map_hash,
+					   tree_map_eq, 0);
+}
+
+
+#include "gt-cp-cp-objcp-common.h"