/* Default language-specific hooks.
- Copyright 2001 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.com>
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+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.
-GNU CC is distributed in the hope that it will be useful,
+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 GNU CC; see the file COPYING. If not, write to
+along with GCC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "toplev.h"
#include "tree.h"
#include "tree-inline.h"
+#include "tree-gimple.h"
#include "rtl.h"
#include "insn-config.h"
#include "integrate.h"
+#include "flags.h"
#include "langhooks.h"
+#include "langhooks-def.h"
+#include "ggc.h"
+#include "diagnostic.h"
/* Do nothing; in many cases the default hook. */
+
void
-lang_hook_default_do_nothing ()
+lhd_do_nothing (void)
{
}
-/* Do nothing; the default hook to decode an option. */
+/* Do nothing (tree). */
+
+void
+lhd_do_nothing_t (tree t ATTRIBUTE_UNUSED)
+{
+}
+
+/* Do nothing (int). */
+
+void
+lhd_do_nothing_i (int i ATTRIBUTE_UNUSED)
+{
+}
+
+/* Do nothing (int, int, int). Return NULL_TREE. */
+
+tree
+lhd_do_nothing_iii_return_null_tree (int i ATTRIBUTE_UNUSED,
+ int j ATTRIBUTE_UNUSED,
+ int k ATTRIBUTE_UNUSED)
+{
+ return NULL_TREE;
+}
+
+/* Do nothing (function). */
+
+void
+lhd_do_nothing_f (struct function *f ATTRIBUTE_UNUSED)
+{
+}
+
+/* Do nothing (return the tree node passed). */
+
+tree
+lhd_return_tree (tree t)
+{
+ return t;
+}
+
+/* Do nothing (return NULL_TREE). */
+
+tree
+lhd_return_null_tree_v (void)
+{
+ return NULL_TREE;
+}
+
+/* Do nothing (return NULL_TREE). */
+
+tree
+lhd_return_null_tree (tree t ATTRIBUTE_UNUSED)
+{
+ return NULL_TREE;
+}
+
+/* The default post options hook. */
+
+bool
+lhd_post_options (const char **pfilename ATTRIBUTE_UNUSED)
+{
+ return false;
+}
+
+/* Called from by print-tree.c. */
+
+void
+lhd_print_tree_nothing (FILE *file ATTRIBUTE_UNUSED,
+ tree node ATTRIBUTE_UNUSED,
+ int indent ATTRIBUTE_UNUSED)
+{
+}
+
+/* Called from safe_from_p. */
+
int
-lang_hook_default_decode_option (argc, argv)
- int argc ATTRIBUTE_UNUSED;
- char **argv ATTRIBUTE_UNUSED;
+lhd_safe_from_p (rtx x ATTRIBUTE_UNUSED, tree exp ATTRIBUTE_UNUSED)
+{
+ return 1;
+}
+
+/* Called from unsafe_for_reeval. */
+
+int
+lhd_unsafe_for_reeval (tree t ATTRIBUTE_UNUSED)
+{
+ return -1;
+}
+
+/* Called from staticp. */
+
+int
+lhd_staticp (tree exp ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+
+/* Called from check_global_declarations. */
+
+bool
+lhd_warn_unused_global_decl (tree decl)
+{
+ /* This is what used to exist in check_global_declarations. Probably
+ not many of these actually apply to non-C languages. */
+
+ if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INLINE (decl))
+ return false;
+ if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
+ return false;
+ if (DECL_IN_SYSTEM_HEADER (decl))
+ return false;
+
+ return true;
+}
+
+/* Set the DECL_ASSEMBLER_NAME for DECL. */
+void
+lhd_set_decl_assembler_name (tree decl)
+{
+ /* The language-independent code should never use the
+ DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
+ VAR_DECLs for variables with static storage duration need a real
+ DECL_ASSEMBLER_NAME. */
+ if (TREE_CODE (decl) == FUNCTION_DECL
+ || (TREE_CODE (decl) == VAR_DECL
+ && (TREE_STATIC (decl)
+ || DECL_EXTERNAL (decl)
+ || TREE_PUBLIC (decl))))
+ {
+ /* By default, assume the name to use in assembly code is the
+ same as that used in the source language. (That's correct
+ for C, and GCC used to set DECL_ASSEMBLER_NAME to the same
+ value as DECL_NAME in build_decl, so this choice provides
+ backwards compatibility with existing front-ends.
+
+ Can't use just the variable's own name for a variable whose
+ scope is less than the whole compilation. Concatenate a
+ distinguishing number - we use the DECL_UID. */
+ if (TREE_PUBLIC (decl) || DECL_CONTEXT (decl) == NULL_TREE)
+ SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl));
+ else
+ {
+ const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
+ char *label;
+
+ ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
+ SET_DECL_ASSEMBLER_NAME (decl, get_identifier (label));
+ }
+ }
+ else
+ /* Nobody should ever be asking for the DECL_ASSEMBLER_NAME of
+ these DECLs -- unless they're in language-dependent code, in
+ which case set_decl_assembler_name hook should handle things. */
+ abort ();
+}
+
+/* By default we always allow bit-field based optimizations. */
+bool
+lhd_can_use_bit_fields_p (void)
+{
+ return true;
+}
+
+/* Type promotion for variable arguments. */
+tree
+lhd_type_promotes_to (tree type ATTRIBUTE_UNUSED)
+{
+ abort ();
+}
+
+/* Registration of machine- or os-specific builtin types. */
+void
+lhd_register_builtin_type (tree type ATTRIBUTE_UNUSED,
+ const char* name ATTRIBUTE_UNUSED)
+{
+}
+
+/* Invalid use of an incomplete type. */
+void
+lhd_incomplete_type_error (tree value ATTRIBUTE_UNUSED, tree type)
+{
+ if (TREE_CODE (type) == ERROR_MARK)
+ return;
+
+ abort ();
+}
+
+/* Provide a default routine for alias sets that always returns -1. This
+ is used by languages that don't need to do anything special. */
+
+HOST_WIDE_INT
+lhd_get_alias_set (tree t ATTRIBUTE_UNUSED)
+{
+ return -1;
+}
+
+/* Provide a hook routine for alias sets that always returns 0. This is
+ used by languages that haven't deal with alias sets yet. */
+
+HOST_WIDE_INT
+hook_get_alias_set_0 (tree t ATTRIBUTE_UNUSED)
{
return 0;
}
+/* This is the default expand_expr function. */
+
+rtx
+lhd_expand_expr (tree t ATTRIBUTE_UNUSED, rtx r ATTRIBUTE_UNUSED,
+ enum machine_mode mm ATTRIBUTE_UNUSED,
+ int em ATTRIBUTE_UNUSED,
+ rtx *a ATTRIBUTE_UNUSED)
+{
+ abort ();
+}
+
+/* The default language-specific function for expanding a decl. After
+ the language-independent cases are handled, this function will be
+ called. If this function is not defined, it is assumed that
+ declarations other than those for variables and labels do not require
+ any RTL generation. */
+
+int
+lhd_expand_decl (tree t ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+
+/* This is the default decl_printable_name function. */
+
+const char *
+lhd_decl_printable_name (tree decl, int verbosity ATTRIBUTE_UNUSED)
+{
+ return IDENTIFIER_POINTER (DECL_NAME (decl));
+}
+
+/* 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
+lhd_types_compatible_p (tree x, tree y)
+{
+ return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y);
+}
+
/* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
after handling common cases, but before walking code-specific
sub-trees. If this hook is overridden for a language, it should
completely handled within this function, it should set *SUBTREES to
0, so that generic handling isn't attempted. For language-specific
tree codes, generic handling would abort(), so make sure it is set
- properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero
+ properly. Both SUBTREES and *SUBTREES is guaranteed to be nonzero
when the function is called. */
tree
-tree_inlining_default_hook_walk_subtrees (tp,subtrees,func,data,htab)
- tree *tp ATTRIBUTE_UNUSED;
- int *subtrees ATTRIBUTE_UNUSED;
- walk_tree_fn func ATTRIBUTE_UNUSED;
- void *data ATTRIBUTE_UNUSED;
- void *htab ATTRIBUTE_UNUSED;
+lhd_tree_inlining_walk_subtrees (tree *tp ATTRIBUTE_UNUSED,
+ int *subtrees ATTRIBUTE_UNUSED,
+ walk_tree_fn func ATTRIBUTE_UNUSED,
+ void *data ATTRIBUTE_UNUSED,
+ void *htab ATTRIBUTE_UNUSED)
{
return NULL_TREE;
}
inlining a given function. */
int
-tree_inlining_default_hook_cannot_inline_tree_fn (fnp)
- tree *fnp ATTRIBUTE_UNUSED;
+lhd_tree_inlining_cannot_inline_tree_fn (tree *fnp)
{
+ if (flag_really_no_inline
+ && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp)) == NULL)
+ return 1;
+
return 0;
}
if it would exceed inlining limits. */
int
-tree_inlining_default_hook_disregard_inline_limits (fn)
- tree fn ATTRIBUTE_UNUSED;
+lhd_tree_inlining_disregard_inline_limits (tree fn)
{
+ if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
+ return 1;
+
return 0;
}
returned. */
tree
-tree_inlining_default_hook_add_pending_fn_decls (vafnp, pfn)
- void *vafnp ATTRIBUTE_UNUSED;
- tree pfn;
+lhd_tree_inlining_add_pending_fn_decls (void *vafnp ATTRIBUTE_UNUSED, tree pfn)
{
return pfn;
}
-/* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
- TREE_CHAIN of a language-specific tree node is relevant, i.e.,
- whether it should be walked, copied and preserved across copies. */
-
-int
-tree_inlining_default_hook_tree_chain_matters_p (t)
- tree t ATTRIBUTE_UNUSED;
-{
- return 0;
-}
-
/* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
whether VT is an automatic variable defined in function FT. */
int
-tree_inlining_default_hook_auto_var_in_fn_p (var, fn)
- tree var, fn;
+lhd_tree_inlining_auto_var_in_fn_p (tree var, tree fn)
{
return (DECL_P (var) && DECL_CONTEXT (var) == fn
&& (((TREE_CODE (var) == VAR_DECL || TREE_CODE (var) == PARM_DECL)
match RES. */
tree
-tree_inlining_default_hook_copy_res_decl_for_inlining (res, fn, caller,
- dm, ndp, texps)
- tree res, fn, caller;
- void *dm ATTRIBUTE_UNUSED;
- int *ndp ATTRIBUTE_UNUSED;
- void *texps ATTRIBUTE_UNUSED;
+lhd_tree_inlining_copy_res_decl_for_inlining (tree res, tree fn, tree caller,
+ void *dm ATTRIBUTE_UNUSED,
+ int *ndp ATTRIBUTE_UNUSED,
+ tree return_slot_addr ATTRIBUTE_UNUSED)
{
- return copy_decl_for_inlining (res, fn, caller);
+ if (return_slot_addr)
+ return build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (return_slot_addr)),
+ return_slot_addr);
+ else
+ return copy_decl_for_inlining (res, fn, caller);
}
/* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
i.e., one whose members are in the same scope as the union itself. */
int
-tree_inlining_default_hook_anon_aggr_type_p (t)
- tree t ATTRIBUTE_UNUSED;
+lhd_tree_inlining_anon_aggr_type_p (tree t ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+
+/* lang_hooks.tree_inlining.start_inlining and end_inlining perform any
+ language-specific bookkeeping necessary for processing
+ FN. start_inlining returns nonzero if inlining should proceed, zero if
+ not.
+
+ For instance, the C++ version keeps track of template instantiations to
+ avoid infinite recursion. */
+
+int
+lhd_tree_inlining_start_inlining (tree fn ATTRIBUTE_UNUSED)
+{
+ return 1;
+}
+
+void
+lhd_tree_inlining_end_inlining (tree fn ATTRIBUTE_UNUSED)
+{
+}
+
+/* lang_hooks.tree_inlining.convert_parm_for_inlining performs any
+ language-specific conversion before assigning VALUE to PARM. */
+
+tree
+lhd_tree_inlining_convert_parm_for_inlining (tree parm ATTRIBUTE_UNUSED,
+ tree value,
+ tree fndecl ATTRIBUTE_UNUSED,
+ int argnum ATTRIBUTE_UNUSED)
+{
+ return value;
+}
+
+/* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
+ nodes. Returns nonzero if it does not want the usual dumping of the
+ second argument. */
+
+bool
+lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED)
+{
+ return false;
+}
+
+/* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
+ language-specific way. */
+
+int
+lhd_tree_dump_type_quals (tree t)
+{
+ return TYPE_QUALS (t);
+}
+
+/* lang_hooks.expr_size: Determine the size of the value of an expression T
+ in a language-specific way. Returns a tree for the size in bytes. */
+
+tree
+lhd_expr_size (tree exp)
+{
+ if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'd'
+ && DECL_SIZE_UNIT (exp) != 0)
+ return DECL_SIZE_UNIT (exp);
+ else
+ return size_in_bytes (TREE_TYPE (exp));
+}
+
+/* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
+
+int
+lhd_gimplify_expr (tree *expr_p ATTRIBUTE_UNUSED, tree *pre_p ATTRIBUTE_UNUSED,
+ tree *post_p ATTRIBUTE_UNUSED)
+{
+ return GS_UNHANDLED;
+}
+
+/* lang_hooks.tree_size: Determine the size of a tree with code C,
+ which is a language-specific tree code in category 'x'. The
+ default expects never to be called. */
+size_t
+lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED)
{
+ abort ();
return 0;
}
+/* Return true if decl, which is a function decl, may be called by a
+ sibcall. */
+
+bool
+lhd_decl_ok_for_sibcall (tree decl ATTRIBUTE_UNUSED)
+{
+ return true;
+}
+
+/* lang_hooks.decls.final_write_globals: perform final processing on
+ global variables. */
+void
+write_global_declarations (void)
+{
+ /* Really define vars that have had only a tentative definition.
+ Really output inline functions that must actually be callable
+ and have not been output so far. */
+
+ tree globals = lang_hooks.decls.getdecls ();
+ int len = list_length (globals);
+ tree *vec = xmalloc (sizeof (tree) * len);
+ int i;
+ tree decl;
+
+ /* Process the decls in reverse order--earliest first.
+ Put them into VEC from back to front, then take out from front. */
+
+ for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
+ vec[len - i - 1] = decl;
+
+ wrapup_global_declarations (vec, len);
+
+ check_global_declarations (vec, len);
+
+ /* Clean up. */
+ free (vec);
+}
+
+/* Called to perform language-specific initialization of CTX. */
+void
+lhd_initialize_diagnostics (struct diagnostic_context *ctx ATTRIBUTE_UNUSED)
+{
+}
+
+/* The default function to print out name of current function that caused
+ an error. */
+void
+lhd_print_error_function (diagnostic_context *context, const char *file)
+{
+ if (diagnostic_last_function_changed (context))
+ {
+ const char *old_prefix = context->printer->prefix;
+ char *new_prefix = file ? file_name_as_prefix (file) : NULL;
+
+ pp_set_prefix (context->printer, new_prefix);
+
+ if (current_function_decl == NULL)
+ pp_printf (context->printer, "At top level:");
+ else
+ {
+ if (TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
+ pp_printf
+ (context->printer, "In member function `%s':",
+ lang_hooks.decl_printable_name (current_function_decl, 2));
+ else
+ pp_printf
+ (context->printer, "In function `%s':",
+ lang_hooks.decl_printable_name (current_function_decl, 2));
+ }
+
+ diagnostic_set_last_function (context);
+ pp_flush (context->printer);
+ context->printer->prefix = old_prefix;
+ free ((char*) new_prefix);
+ }
+}
+
+tree
+lhd_callgraph_analyze_expr (tree *tp ATTRIBUTE_UNUSED,
+ int *walk_subtrees ATTRIBUTE_UNUSED,
+ tree decl ATTRIBUTE_UNUSED)
+{
+ return NULL;
+}
+
+tree
+lhd_make_node (enum tree_code code)
+{
+ return make_node (code);
+}
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