/* Some code common to C and ObjC front ends.
- Copyright (C) 2001 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GCC.
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "tree.h"
#include "rtl.h"
#include "insn-config.h"
#include "varray.h"
#include "ggc.h"
#include "langhooks.h"
+#include "target.h"
+#include "cgraph.h"
-static int c_tree_printer PARAMS ((output_buffer *));
-static tree inline_forbidden_p PARAMS ((tree *, int *, void *));
-static void expand_deferred_fns PARAMS ((void));
-static tree start_cdtor PARAMS ((int));
-static void finish_cdtor PARAMS ((tree));
-
-static varray_type deferred_fns;
+static bool c_tree_printer (pretty_printer *, text_info *);
+static tree start_cdtor (int);
+static void finish_cdtor (tree);
int
-c_missing_noreturn_ok_p (decl)
- tree decl;
+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)
{
if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
return 1;
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);
-
- /* 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;
-}
-
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 (flag_really_no_inline
&& lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL)
- return 1;
+ {
+ if (do_warning)
+ warning ("%Jfunction '%F' can never be inlined because it "
+ "is supressed using -fno-inline", fn, fn);
+ goto cannot_inline;
+ }
+
+ /* 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))
+ {
+ if (do_warning)
+ warning ("%Jfunction '%F' can never be inlined because it might not "
+ "be bound within this unit of translation", fn, fn);
+ goto cannot_inline;
+ }
if (! function_attribute_inlinable_p (fn))
{
- DECL_UNINLINABLE (fn) = 1;
- return 1;
+ if (do_warning)
+ warning ("%Jfunction '%F' can never be inlined because it uses "
+ "attributes conflicting with inlining", fn, fn);
+ goto cannot_inline;
}
/* If a function has pending sizes, we must not defer its
if (t)
{
- DECL_UNINLINABLE (fn) = 1;
- return 1;
+ if (do_warning)
+ warning ("%Jfunction '%F' can never be inlined because it has "
+ "pending sizes", fn, fn);
+ goto cannot_inline;
}
}
- if (DECL_CONTEXT (fn))
+ if (! DECL_FILE_SCOPE_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;
+ if (do_warning)
+ warning ("%Jnested function '%F' can never be inlined because it "
+ "has possibly saved pending sizes", fn, fn);
+ goto cannot_inline;
}
}
- 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;
- }
return 0;
+
+ cannot_inline:
+ DECL_UNINLINABLE (fn) = 1;
+ return 1;
+}
+
+/* Called from check_global_declarations. */
+
+bool
+c_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;
+
+ return true;
}
/* Initialization common to C and Objective-C front ends. */
-const char *
-c_objc_common_init (filename)
- const char *filename;
+bool
+c_objc_common_init (void)
{
- c_init_decl_processing ();
+ static const enum tree_code stmt_codes[] = {
+ c_common_stmt_codes
+ };
- filename = c_common_init (filename);
- if (filename == NULL)
- return NULL;
+ INIT_STATEMENT_CODES (stmt_codes);
- lang_unsafe_for_reeval = c_unsafe_for_reeval;
+ c_init_decl_processing ();
+
+ if (c_common_init () == false)
+ return false;
- save_lang_status = &push_c_function_context;
- restore_lang_status = &pop_c_function_context;
- mark_lang_status = &mark_c_function_context;
lang_expand_decl_stmt = c_expand_decl_stmt;
/* These were not defined in the Objective-C front end, but I'm
mesg_implicit_function_declaration = 0;
}
- VARRAY_TREE_INIT (deferred_fns, 32, "deferred_fns");
- ggc_add_tree_varray_root (&deferred_fns, 1);
-
- return filename;
-}
-
-/* Register a function tree, so that its optimization and conversion
- to RTL is only done at the end of the compilation. */
-
-int
-defer_fn (fn)
- tree fn;
-{
- VARRAY_PUSH_TREE (deferred_fns, fn);
-
- return 1;
-}
-
-/* Expand deferred functions for C and ObjC. */
-
-static void
-expand_deferred_fns ()
-{
- unsigned int i;
-
- for (i = 0; i < VARRAY_ACTIVE_SIZE (deferred_fns); i++)
- {
- tree decl = VARRAY_TREE (deferred_fns, i);
-
- if (! TREE_ASM_WRITTEN (decl))
- {
- /* For static inline functions, delay the decision whether to
- emit them or not until wrapup_global_declarations. */
- if (! TREE_PUBLIC (decl))
- DECL_DEFER_OUTPUT (decl) = 1;
- c_expand_deferred_function (decl);
- }
- }
-
- VARRAY_FREE (deferred_fns);
+ return true;
}
static tree
-start_cdtor (method_type)
- int method_type;
+start_cdtor (int method_type)
{
tree fnname = get_file_function_name (method_type);
tree void_list_node_1 = build_tree_list (NULL_TREE, void_type_node);
}
static void
-finish_cdtor (body)
- tree body;
+finish_cdtor (tree body)
{
tree scope;
tree block;
RECHAIN_STMTS (body, COMPOUND_BODY (body));
- finish_function (0);
+ finish_function ();
}
/* Called at end of parsing, but before end-of-file processing. */
void
-c_objc_common_finish_file ()
+c_objc_common_finish_file (void)
{
- expand_deferred_fns ();
+ if (pch_file)
+ c_common_write_pch ();
+
+ /* If multiple translation units were built, copy information between
+ them based on linkage rules. */
+ merge_translation_unit_decls ();
+
+ cgraph_finalize_compilation_unit ();
+ cgraph_optimize ();
if (static_ctors)
{
source-level entity onto BUFFER. The meaning of the format specifiers
is as follows:
%D: a general decl,
+ %E: An 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)
{
- tree t = va_arg (output_buffer_format_args (buffer), tree);
+ tree t = va_arg (*text->args_ptr, tree);
- switch (*output_buffer_text_cursor (buffer))
+ switch (*text->format_spec)
{
case 'D':
case 'F':
const char *n = DECL_NAME (t)
? (*lang_hooks.decl_printable_name) (t, 2)
: "({anonymous})";
- output_add_string (buffer, n);
+ pp_string (pp, n);
}
- return 1;
+ return true;
+
+ case 'E':
+ if (TREE_CODE (t) == IDENTIFIER_NODE)
+ {
+ pp_string (pp, IDENTIFIER_POINTER (t));
+ return true;
+ }
+ return false;
default:
- return 0;
+ return false;
}
}
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