/* Some code common to C and ObjC front ends.
- Copyright (C) 2001 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GCC.
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. */
+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 "rtl.h"
#include "insn-config.h"
#include "integrate.h"
-#include "expr.h"
#include "c-tree.h"
+#include "c-pretty-print.h"
#include "function.h"
#include "flags.h"
#include "toplev.h"
#include "diagnostic.h"
#include "tree-inline.h"
-
-static int c_tree_printer PARAMS ((output_buffer *));
-static tree inline_forbidden_p PARAMS ((tree *, int *, void *));
-
-int
-c_missing_noreturn_ok_p (decl)
- tree decl;
+#include "varray.h"
+#include "ggc.h"
+#include "langhooks.h"
+#include "tree-mudflap.h"
+#include "target.h"
+#include "c-objc-common.h"
+
+static bool c_tree_printer (pretty_printer *, text_info *, const char *,
+ int, bool, bool, bool);
+
+bool
+c_missing_noreturn_ok_p (tree decl)
{
/* A missing noreturn is not ok for freestanding implementations and
ok for the `main' function in hosted implementations. */
such functions always being inlined when optimizing. */
int
-c_disregard_inline_limits (fn)
- tree fn;
+c_disregard_inline_limits (tree fn)
{
- return DECL_DECLARED_INLINE_P (fn) && DECL_EXTERNAL (fn);
-}
-
-static tree
-inline_forbidden_p (nodep, walk_subtrees, fn)
- tree *nodep;
- int *walk_subtrees ATTRIBUTE_UNUSED;
- void *fn;
-{
- tree node = *nodep;
- tree t;
-
- switch (TREE_CODE (node))
- {
- case CALL_EXPR:
- t = get_callee_fndecl (node);
-
- if (! t)
- break;
-
- /* We cannot inline functions that call setjmp. */
- if (setjmp_call_p (t))
- return node;
-
- switch (DECL_FUNCTION_CODE (t))
- {
- /* We cannot inline functions that take a variable number of
- arguments. */
- case BUILT_IN_VARARGS_START:
- case BUILT_IN_STDARG_START:
-#if 0
- /* Functions that need information about the address of the
- caller can't (shouldn't?) be inlined. */
- case BUILT_IN_RETURN_ADDRESS:
-#endif
- return node;
-
- default:
- break;
- }
-
- break;
-
- case DECL_STMT:
- /* We cannot inline functions that contain other functions. */
- if (TREE_CODE (TREE_OPERAND (node, 0)) == FUNCTION_DECL
- && DECL_INITIAL (TREE_OPERAND (node, 0)))
- return node;
- break;
-
- case GOTO_STMT:
- case GOTO_EXPR:
- t = TREE_OPERAND (node, 0);
+ if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
+ return 1;
- /* We will not inline a function which uses computed goto. The
- addresses of its local labels, which may be tucked into
- global storage, are of course not constant across
- instantiations, which causes unexpected behaviour. */
- if (TREE_CODE (t) != LABEL_DECL)
- return node;
-
- /* We cannot inline a nested function that jumps to a nonlocal
- label. */
- if (TREE_CODE (t) == LABEL_DECL
- && DECL_CONTEXT (t) && DECL_CONTEXT (t) != fn)
- return node;
-
- break;
-
- default:
- break;
- }
-
- return NULL_TREE;
+ return (!flag_really_no_inline && DECL_DECLARED_INLINE_P (fn)
+ && DECL_EXTERNAL (fn));
}
int
-c_cannot_inline_tree_fn (fnp)
- tree *fnp;
+c_cannot_inline_tree_fn (tree *fnp)
{
tree fn = *fnp;
- tree t;
+ bool do_warning = (warn_inline
+ && DECL_INLINE (fn)
+ && DECL_DECLARED_INLINE_P (fn)
+ && !DECL_IN_SYSTEM_HEADER (fn));
- if (! function_attribute_inlinable_p (fn))
+ if (flag_really_no_inline
+ && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL)
{
- DECL_UNINLINABLE (fn) = 1;
- return 1;
+ if (do_warning)
+ warning (OPT_Winline, "function %q+F can never be inlined because it "
+ "is suppressed using -fno-inline", fn);
+ goto cannot_inline;
}
- /* If a function has pending sizes, we must not defer its
- compilation, and we can't inline it as a tree. */
- if (fn == current_function_decl)
+ /* Don't auto-inline anything that might not be bound within
+ this unit of translation. */
+ if (!DECL_DECLARED_INLINE_P (fn) && !targetm.binds_local_p (fn))
{
- t = get_pending_sizes ();
- put_pending_sizes (t);
-
- if (t)
- {
- DECL_UNINLINABLE (fn) = 1;
- return 1;
- }
+ if (do_warning)
+ warning (OPT_Winline, "function %q+F can never be inlined because it "
+ "might not be bound within this unit of translation", fn);
+ goto cannot_inline;
}
- if (DECL_CONTEXT (fn))
+ if (!function_attribute_inlinable_p (fn))
{
- /* If a nested function has pending sizes, we may have already
- saved them. */
- if (DECL_LANG_SPECIFIC (fn)->pending_sizes)
- {
- DECL_UNINLINABLE (fn) = 1;
- return 1;
- }
- }
- else
- {
- /* We rely on the fact that this function is called upfront,
- just before we start expanding a function. If FN is active
- (i.e., it's the current_function_decl or a parent thereof),
- we have to walk FN's saved tree. Otherwise, we can safely
- assume we have done it before and, if we didn't mark it as
- uninlinable (in which case we wouldn't have been called), it
- is inlinable. Unfortunately, this strategy doesn't work for
- nested functions, because they're only expanded as part of
- their enclosing functions, so the inlinability test comes in
- late. */
- t = current_function_decl;
-
- while (t && t != fn)
- t = DECL_CONTEXT (t);
- if (! t)
- return 0;
- }
-
- if (walk_tree (&DECL_SAVED_TREE (fn), inline_forbidden_p, fn, NULL))
- {
- DECL_UNINLINABLE (fn) = 1;
- return 1;
+ if (do_warning)
+ warning (OPT_Winline, "function %q+F can never be inlined because it "
+ "uses attributes conflicting with inlining", fn);
+ goto cannot_inline;
}
return 0;
+
+ cannot_inline:
+ DECL_UNINLINABLE (fn) = 1;
+ return 1;
}
-/* Initialization common to C and Objective-C front ends. */
-const char *
-c_objc_common_init (filename)
- const char *filename;
+/* Called from check_global_declarations. */
+
+bool
+c_warn_unused_global_decl (tree decl)
{
- c_init_decl_processing ();
+ if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
+ return false;
+ if (DECL_IN_SYSTEM_HEADER (decl))
+ return false;
- filename = c_common_init (filename);
+ return true;
+}
- add_c_tree_codes ();
+/* Initialization common to C and Objective-C front ends. */
+bool
+c_objc_common_init (void)
+{
+ c_init_decl_processing ();
- save_lang_status = &push_c_function_context;
- restore_lang_status = &pop_c_function_context;
- mark_lang_status = &mark_c_function_context;
- lang_expand_expr = c_expand_expr;
- lang_expand_decl_stmt = c_expand_decl_stmt;
+ if (c_common_init () == false)
+ return false;
/* These were not defined in the Objective-C front end, but I'm
putting them here anyway. The diagnostic format decoder might
want an enhanced ObjC implementation. */
diagnostic_format_decoder (global_dc) = &c_tree_printer;
- lang_missing_noreturn_ok_p = &c_missing_noreturn_ok_p;
/* If still unspecified, make it match -std=c99
(allowing for -pedantic-errors). */
mesg_implicit_function_declaration = 0;
}
- return filename;
+ return true;
}
/* Called during diagnostic message formatting process to print a
source-level entity onto BUFFER. The meaning of the format specifiers
is as follows:
%D: a general decl,
+ %E: an identifier or expression,
%F: a function declaration,
%T: a type.
by the C++ front-end.
Please notice when called, the `%' part was already skipped by the
diagnostic machinery. */
-static int
-c_tree_printer (buffer)
- output_buffer *buffer;
+static bool
+c_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
+ int precision, bool wide, bool set_locus, bool hash)
{
- tree t = va_arg (output_buffer_format_args (buffer), tree);
+ tree t = va_arg (*text->args_ptr, tree);
+ tree name;
+ const char *n = "({anonymous})";
+ c_pretty_printer *cpp = (c_pretty_printer *) pp;
+ pp->padding = pp_none;
+
+ if (precision != 0 || wide || hash)
+ return false;
+
+ if (set_locus && text->locus)
+ *text->locus = DECL_SOURCE_LOCATION (t);
- switch (*output_buffer_text_cursor (buffer))
+ switch (*spec)
{
case 'D':
+ if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
+ {
+ t = DECL_DEBUG_EXPR (t);
+ if (!DECL_P (t))
+ {
+ pp_c_expression (cpp, t);
+ return true;
+ }
+ }
+ /* FALLTHRU */
+
case 'F':
+ if (DECL_NAME (t))
+ n = lang_hooks.decl_printable_name (t, 2);
+ break;
+
case 'T':
- {
- const char *n = DECL_NAME (t)
- ? (*decl_printable_name) (t, 2)
- : "({anonymous})";
- output_add_string (buffer, n);
- }
- return 1;
+ gcc_assert (TYPE_P (t));
+ name = TYPE_NAME (t);
+
+ if (name && TREE_CODE (name) == TYPE_DECL)
+ {
+ if (DECL_NAME (name))
+ pp_string (cpp, lang_hooks.decl_printable_name (name, 2));
+ else
+ pp_type_id (cpp, t);
+ return true;
+ }
+ else
+ {
+ pp_type_id (cpp, t);
+ return true;
+ }
+ break;
+
+ case 'E':
+ if (TREE_CODE (t) == IDENTIFIER_NODE)
+ n = IDENTIFIER_POINTER (t);
+ else
+ {
+ pp_expression (cpp, t);
+ return true;
+ }
+ break;
default:
- return 0;
+ return false;
}
+
+ pp_string (cpp, n);
+ return true;
+}
+
+/* In C and ObjC, all decls have "C" linkage. */
+bool
+has_c_linkage (tree decl ATTRIBUTE_UNUSED)
+{
+ return true;
+}
+
+void
+c_initialize_diagnostics (diagnostic_context *context)
+{
+ pretty_printer *base = context->printer;
+ c_pretty_printer *pp = XNEW (c_pretty_printer);
+ memcpy (pp_base (pp), base, sizeof (pretty_printer));
+ pp_c_pretty_printer_init (pp);
+ context->printer = (pretty_printer *) pp;
+
+ /* It is safe to free this object because it was previously XNEW()'d. */
+ XDELETE (base);
+}
+
+int
+c_types_compatible_p (tree x, tree y)
+{
+ return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y));
}
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