/* Default language-specific hooks.
- Copyright 2001, 2002 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.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)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
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, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
+#include "intl.h"
#include "tm.h"
#include "toplev.h"
#include "tree.h"
#include "tree-inline.h"
+#include "gimple.h"
#include "rtl.h"
#include "insn-config.h"
#include "integrate.h"
#include "flags.h"
#include "langhooks.h"
+#include "target.h"
#include "langhooks-def.h"
+#include "ggc.h"
+#include "diagnostic.h"
/* Do nothing; in many cases the default hook. */
void
-lhd_do_nothing ()
+lhd_do_nothing (void)
{
}
/* Do nothing (tree). */
void
-lhd_do_nothing_t (t)
- tree t ATTRIBUTE_UNUSED;
+lhd_do_nothing_t (tree ARG_UNUSED (t))
{
}
/* Do nothing (int). */
void
-lhd_do_nothing_i (i)
- int i ATTRIBUTE_UNUSED;
+lhd_do_nothing_i (int ARG_UNUSED (i))
{
}
-/* Do nothing (function). */
+/* Do nothing (int, int, int). Return NULL_TREE. */
-void
-lhd_do_nothing_f (f)
- struct function *f ATTRIBUTE_UNUSED;
+tree
+lhd_do_nothing_iii_return_null_tree (int ARG_UNUSED (i),
+ int ARG_UNUSED (j),
+ int ARG_UNUSED (k))
{
+ return NULL_TREE;
}
-/* Do nothing (return the tree node passed). */
+/* Do nothing (function). */
-tree
-lhd_return_tree (t)
- tree t;
+void
+lhd_do_nothing_f (struct function * ARG_UNUSED (f))
{
- return t;
}
/* Do nothing (return NULL_TREE). */
tree
-lhd_return_null_tree (t)
- tree t ATTRIBUTE_UNUSED;
+lhd_return_null_tree_v (void)
{
return NULL_TREE;
}
-/* The default post options hook. */
+/* Do nothing (return NULL_TREE). */
-bool
-lhd_post_options (pfilename)
- const char **pfilename ATTRIBUTE_UNUSED;
+tree
+lhd_return_null_tree (tree ARG_UNUSED (t))
{
- return false;
+ return NULL_TREE;
}
-/* Called from by print-tree.c. */
+/* Do nothing (return NULL_TREE). */
-void
-lhd_print_tree_nothing (file, node, indent)
- FILE *file ATTRIBUTE_UNUSED;
- tree node ATTRIBUTE_UNUSED;
- int indent ATTRIBUTE_UNUSED;
+tree
+lhd_return_null_const_tree (const_tree ARG_UNUSED (t))
{
+ return NULL_TREE;
}
-/* Called from safe_from_p. */
+/* The default post options hook. */
-int
-lhd_safe_from_p (x, exp)
- rtx x ATTRIBUTE_UNUSED;
- tree exp ATTRIBUTE_UNUSED;
+bool
+lhd_post_options (const char ** ARG_UNUSED (pfilename))
{
- return 1;
+ return false;
}
-/* Called from unsafe_for_reeval. */
+/* Called from by print-tree.c. */
-int
-lhd_unsafe_for_reeval (t)
- tree t ATTRIBUTE_UNUSED;
+void
+lhd_print_tree_nothing (FILE * ARG_UNUSED (file),
+ tree ARG_UNUSED (node),
+ int ARG_UNUSED (indent))
{
- return -1;
}
/* Called from staticp. */
-int
-lhd_staticp (exp)
- tree exp ATTRIBUTE_UNUSED;
+tree
+lhd_staticp (tree ARG_UNUSED (exp))
{
- return 0;
+ return NULL;
}
/* Called from check_global_declarations. */
bool
-lhd_warn_unused_global_decl (decl)
- tree decl;
+lhd_warn_unused_global_decl (const_tree decl)
{
/* This is what used to exist in check_global_declarations. Probably
not many of these actually apply to non-C languages. */
/* Set the DECL_ASSEMBLER_NAME for DECL. */
void
-lhd_set_decl_assembler_name (decl)
- tree decl;
+lhd_set_decl_assembler_name (tree decl)
{
+ tree id;
+
/* 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. */
- SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl));
+ gcc_assert (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. This assumption is wrapped
+ in a target hook, to allow for target-specific modification of the
+ identifier.
+
+ 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)
+ id = targetm.mangle_decl_assembler_name (decl, DECL_NAME (decl));
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 ();
-}
+ {
+ const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
+ char *label;
+
+ ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
+ id = get_identifier (label);
+ }
+ SET_DECL_ASSEMBLER_NAME (decl, id);
-/* By default we always allow bit-field based optimizations. */
-bool
-lhd_can_use_bit_fields_p ()
-{
- return true;
}
-/* Provide a default routine to clear the binding stack. This is used
- by languages that don't need to do anything special. */
-void
-lhd_clear_binding_stack ()
+/* Type promotion for variable arguments. */
+tree
+lhd_type_promotes_to (tree ARG_UNUSED (type))
{
- while (! (*lang_hooks.decls.global_bindings_p) ())
- poplevel (0, 0, 0);
+ gcc_unreachable ();
}
-/* Type promotion for variable arguments. */
-tree
-lhd_type_promotes_to (type)
- tree type ATTRIBUTE_UNUSED;
+/* Registration of machine- or os-specific builtin types. */
+void
+lhd_register_builtin_type (tree ARG_UNUSED (type),
+ const char * ARG_UNUSED (name))
{
- abort ();
}
/* Invalid use of an incomplete type. */
void
-lhd_incomplete_type_error (value, type)
- tree value ATTRIBUTE_UNUSED, type;
+lhd_incomplete_type_error (const_tree ARG_UNUSED (value), const_tree type)
{
- if (TREE_CODE (type) == ERROR_MARK)
- return;
-
- abort ();
+ gcc_assert (TREE_CODE (type) == ERROR_MARK);
+ return;
}
/* 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 (t)
- tree t ATTRIBUTE_UNUSED;
+alias_set_type
+lhd_get_alias_set (tree ARG_UNUSED (t))
{
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 (t)
- tree t ATTRIBUTE_UNUSED;
-{
- return 0;
-}
-
/* This is the default expand_expr function. */
rtx
-lhd_expand_expr (t, r, mm, em)
- tree t ATTRIBUTE_UNUSED;
- rtx r ATTRIBUTE_UNUSED;
- enum machine_mode mm ATTRIBUTE_UNUSED;
- int em ATTRIBUTE_UNUSED;
-{
- abort ();
-}
-
-/* This is the default decl_printable_name function. */
-
-const char *
-lhd_decl_printable_name (decl, verbosity)
- tree decl;
- int verbosity ATTRIBUTE_UNUSED;
-{
- return IDENTIFIER_POINTER (DECL_NAME (decl));
-}
-
-/* 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
- handle language-specific tree codes, as well as language-specific
- information associated to common tree codes. If a tree node is
- 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 nonzero
- when the function is called. */
-
-tree
-lhd_tree_inlining_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_expand_expr (tree ARG_UNUSED (t), rtx ARG_UNUSED (r),
+ enum machine_mode ARG_UNUSED (mm),
+ int ARG_UNUSED (em),
+ rtx * ARG_UNUSED (a))
{
- return NULL_TREE;
-}
-
-/* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
- determine whether there are language-specific reasons for not
- inlining a given function. */
-
-int
-lhd_tree_inlining_cannot_inline_tree_fn (fnp)
- tree *fnp;
-{
- if (flag_really_no_inline
- && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp)) == NULL)
- return 1;
-
- return 0;
+ gcc_unreachable ();
}
-/* lang_hooks.tree_inlining.disregard_inline_limits is called to
- determine whether a function should be considered for inlining even
- if it would exceed inlining limits. */
+/* 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_tree_inlining_disregard_inline_limits (fn)
- tree fn;
+lhd_expand_decl (tree ARG_UNUSED (t))
{
- if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
- return 1;
-
return 0;
}
-/* lang_hooks.tree_inlining.add_pending_fn_decls is called before
- starting to inline a function, to push any language-specific
- functions that should not be inlined into the current function,
- into VAFNP. PFN is the top of varray, and should be returned if no
- functions are pushed into VAFNP. The top of the varray should be
- returned. */
-
-tree
-lhd_tree_inlining_add_pending_fn_decls (vafnp, pfn)
- 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. */
+/* This is the default decl_printable_name function. */
-int
-lhd_tree_inlining_tree_chain_matters_p (t)
- tree t ATTRIBUTE_UNUSED;
+const char *
+lhd_decl_printable_name (tree decl, int ARG_UNUSED (verbosity))
{
- return 0;
+ gcc_assert (decl && DECL_NAME (decl));
+ return IDENTIFIER_POINTER (DECL_NAME (decl));
}
-/* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
- whether VT is an automatic variable defined in function FT. */
+/* This is the default dwarf_name function. */
-int
-lhd_tree_inlining_auto_var_in_fn_p (var, fn)
- tree var, fn;
+const char *
+lhd_dwarf_name (tree t, int verbosity)
{
- return (DECL_P (var) && DECL_CONTEXT (var) == fn
- && (((TREE_CODE (var) == VAR_DECL || TREE_CODE (var) == PARM_DECL)
- && ! TREE_STATIC (var))
- || TREE_CODE (var) == LABEL_DECL
- || TREE_CODE (var) == RESULT_DECL));
-}
-
-/* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
- declaration for the result RES of function FN to be inlined into
- CALLER. NDP points to an integer that should be set in case a new
- declaration wasn't created (presumably because RES was of aggregate
- type, such that a TARGET_EXPR is used for the result). TEXPS is a
- pointer to a varray with the stack of TARGET_EXPRs seen while
- inlining functions into caller; the top of TEXPS is supposed to
- match RES. */
-
-tree
-lhd_tree_inlining_copy_res_decl_for_inlining (res, fn, caller,
- dm, ndp, return_slot_addr)
- tree res, fn, caller;
- void *dm ATTRIBUTE_UNUSED;
- int *ndp ATTRIBUTE_UNUSED;
- tree return_slot_addr ATTRIBUTE_UNUSED;
-{
- 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
- type node representing an anonymous aggregate (union, struct, etc),
- i.e., one whose members are in the same scope as the union itself. */
+ gcc_assert (DECL_P (t));
-int
-lhd_tree_inlining_anon_aggr_type_p (t)
- tree t ATTRIBUTE_UNUSED;
-{
- return 0;
+ return lang_hooks.decl_printable_name (t, verbosity);
}
-/* 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. */
+/* 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_tree_inlining_start_inlining (fn)
- tree fn ATTRIBUTE_UNUSED;
-{
- return 1;
-}
-
-void
-lhd_tree_inlining_end_inlining (fn)
- 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 (parm, value, fndecl)
- tree parm ATTRIBUTE_UNUSED;
- tree value;
- tree fndecl ATTRIBUTE_UNUSED;
+lhd_types_compatible_p (tree x, tree y)
{
- return value;
+ return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y);
}
/* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
second argument. */
bool
-lhd_tree_dump_dump_tree (di, t)
- void *di ATTRIBUTE_UNUSED;
- tree t ATTRIBUTE_UNUSED;
+lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED)
{
return false;
}
language-specific way. */
int
-lhd_tree_dump_type_quals (t)
- tree t;
+lhd_tree_dump_type_quals (const_tree t)
{
return TYPE_QUALS (t);
}
in a language-specific way. Returns a tree for the size in bytes. */
tree
-lhd_expr_size (exp)
- tree exp;
+lhd_expr_size (const_tree exp)
{
- if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'd'
+ if (DECL_P (exp)
&& 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,
+ gimple_seq *pre_p ATTRIBUTE_UNUSED,
+ gimple_seq *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. */
+ which is a language-specific tree code in category tcc_constant or
+ tcc_exceptional. The default expects never to be called. */
size_t
-lhd_tree_size (c)
- enum tree_code c ATTRIBUTE_UNUSED;
+lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED)
{
- abort ();
- return 0;
+ gcc_unreachable ();
}
/* Return true if decl, which is a function decl, may be called by a
sibcall. */
bool
-lhd_decl_ok_for_sibcall (decl)
- tree decl ATTRIBUTE_UNUSED;
+lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED)
{
return true;
}
+/* Return the COMDAT group into which DECL should be placed. */
+
+const char *
+lhd_comdat_group (tree decl)
+{
+ return IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
+}
+
/* lang_hooks.decls.final_write_globals: perform final processing on
global variables. */
void
-write_global_declarations ()
+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) ();
+ tree globals = lang_hooks.decls.getdecls ();
int len = list_length (globals);
- tree *vec = (tree *) xmalloc (sizeof (tree) * len);
+ tree *vec = XNEWVEC (tree, len);
int i;
tree decl;
vec[len - i - 1] = decl;
wrapup_global_declarations (vec, len);
-
check_global_declarations (vec, len);
+ emit_debug_global_declarations (vec, len);
- /* Clean up. */
+ /* 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,
+ diagnostic_info *diagnostic)
+{
+ if (diagnostic_last_function_changed (context, diagnostic))
+ {
+ const char *old_prefix = context->printer->prefix;
+ tree abstract_origin = diagnostic->abstract_origin;
+ char *new_prefix = (file && abstract_origin == NULL)
+ ? 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
+ {
+ tree fndecl, ao;
+
+ if (abstract_origin)
+ {
+ ao = BLOCK_ABSTRACT_ORIGIN (abstract_origin);
+ while (TREE_CODE (ao) == BLOCK
+ && BLOCK_ABSTRACT_ORIGIN (ao)
+ && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
+ ao = BLOCK_ABSTRACT_ORIGIN (ao);
+ gcc_assert (TREE_CODE (ao) == FUNCTION_DECL);
+ fndecl = ao;
+ }
+ else
+ fndecl = current_function_decl;
+
+ if (TREE_CODE (TREE_TYPE (fndecl)) == METHOD_TYPE)
+ pp_printf
+ (context->printer, _("In member function %qs"),
+ lang_hooks.decl_printable_name (fndecl, 2));
+ else
+ pp_printf
+ (context->printer, _("In function %qs"),
+ lang_hooks.decl_printable_name (fndecl, 2));
+
+ while (abstract_origin)
+ {
+ location_t *locus;
+ tree block = abstract_origin;
+
+ locus = &BLOCK_SOURCE_LOCATION (block);
+ fndecl = NULL;
+ block = BLOCK_SUPERCONTEXT (block);
+ while (block && TREE_CODE (block) == BLOCK
+ && BLOCK_ABSTRACT_ORIGIN (block))
+ {
+ ao = BLOCK_ABSTRACT_ORIGIN (block);
+
+ while (TREE_CODE (ao) == BLOCK
+ && BLOCK_ABSTRACT_ORIGIN (ao)
+ && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
+ ao = BLOCK_ABSTRACT_ORIGIN (ao);
+
+ if (TREE_CODE (ao) == FUNCTION_DECL)
+ {
+ fndecl = ao;
+ break;
+ }
+ else if (TREE_CODE (ao) != BLOCK)
+ break;
+
+ block = BLOCK_SUPERCONTEXT (block);
+ }
+ if (fndecl)
+ abstract_origin = block;
+ else
+ {
+ while (block && TREE_CODE (block) == BLOCK)
+ block = BLOCK_SUPERCONTEXT (block);
+
+ if (TREE_CODE (block) == FUNCTION_DECL)
+ fndecl = block;
+ abstract_origin = NULL;
+ }
+ if (fndecl)
+ {
+ expanded_location s = expand_location (*locus);
+ pp_character (context->printer, ',');
+ pp_newline (context->printer);
+ if (s.file != NULL)
+ {
+ if (flag_show_column && s.column != 0)
+ pp_printf (context->printer,
+ _(" inlined from %qs at %s:%d:%d"),
+ lang_hooks.decl_printable_name (fndecl, 2),
+ s.file, s.line, s.column);
+ else
+ pp_printf (context->printer,
+ _(" inlined from %qs at %s:%d"),
+ lang_hooks.decl_printable_name (fndecl, 2),
+ s.file, s.line);
+
+ }
+ else
+ pp_printf (context->printer, _(" inlined from %qs"),
+ lang_hooks.decl_printable_name (fndecl, 2));
+ }
+ }
+ pp_character (context->printer, ':');
+ }
+
+ diagnostic_set_last_function (context, diagnostic);
+ 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)
+{
+ return NULL;
+}
+
+tree
+lhd_make_node (enum tree_code code)
+{
+ return make_node (code);
+}
+
+HOST_WIDE_INT
+lhd_to_target_charset (HOST_WIDE_INT c)
+{
+ return c;
+}
+
+tree
+lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED)
+{
+ return expr;
+}
+
+/* Return sharing kind if OpenMP sharing attribute of DECL is
+ predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
+
+enum omp_clause_default_kind
+lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED)
+{
+ if (DECL_ARTIFICIAL (decl))
+ return OMP_CLAUSE_DEFAULT_SHARED;
+ return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
+}
+
+/* Generate code to copy SRC to DST. */
+
+tree
+lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src)
+{
+ return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
+}
+
+/* Register language specific type size variables as potentially OpenMP
+ firstprivate variables. */
+
+void
+lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c ATTRIBUTE_UNUSED,
+ tree t ATTRIBUTE_UNUSED)
+{
+}
+
+tree
+add_builtin_function (const char *name,
+ tree type,
+ int function_code,
+ enum built_in_class cl,
+ const char *library_name,
+ tree attrs)
+{
+ tree id = get_identifier (name);
+ tree decl = build_decl (FUNCTION_DECL, id, type);
+
+ TREE_PUBLIC (decl) = 1;
+ DECL_EXTERNAL (decl) = 1;
+ DECL_BUILT_IN_CLASS (decl) = cl;
+
+ DECL_FUNCTION_CODE (decl) = -1;
+ gcc_assert (DECL_FUNCTION_CODE (decl) >= function_code);
+ DECL_FUNCTION_CODE (decl) = function_code;
+
+ if (library_name)
+ {
+ tree libname = get_identifier (library_name);
+ SET_DECL_ASSEMBLER_NAME (decl, libname);
+ }
+
+ /* Possibly apply some default attributes to this built-in function. */
+ if (attrs)
+ decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
+ else
+ decl_attributes (&decl, NULL_TREE, 0);
+
+ return lang_hooks.builtin_function (decl);
+
+}
+
+tree
+lhd_builtin_function (tree decl)
+{
+ lang_hooks.decls.pushdecl (decl);
+ return decl;
+}
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