/* Some code common to C and ObjC front ends.
- Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GCC.
#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 "varray.h"
#include "ggc.h"
#include "langhooks.h"
+#include "tree-mudflap.h"
#include "target.h"
-#include "cgraph.h"
+#include "c-objc-common.h"
static bool c_tree_printer (pretty_printer *, text_info *);
-static tree inline_forbidden_p (tree *, int *, void *);
-static void expand_deferred_fns (void);
-static tree start_cdtor (int);
-static void finish_cdtor (tree);
-static GTY(()) varray_type deferred_fns;
-
-int
+bool
c_missing_noreturn_ok_p (tree decl)
{
/* A missing noreturn is not ok for freestanding implementations and
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 (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_VA_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 behavior. */
- 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_FILE_SCOPE_P (t) && DECL_CONTEXT (t) != fn)
- return node;
-
- break;
-
- case RECORD_TYPE:
- case UNION_TYPE:
- /* We cannot inline a function of the form
-
- void F (int i) { struct S { int ar[i]; } s; }
-
- Attempting to do so produces a catch-22 in tree-inline.c.
- If walk_tree examines the TYPE_FIELDS chain of RECORD_TYPE/
- UNION_TYPE nodes, then it goes into infinite recursion on a
- structure containing a pointer to its own type. If it doesn't,
- then the type node for S doesn't get adjusted properly when
- F is inlined, and we abort in find_function_data. */
- for (t = TYPE_FIELDS (node); t; t = TREE_CHAIN (t))
- if (variably_modified_type_p (TREE_TYPE (t)))
- return node;
-
- default:
- break;
- }
-
- return NULL_TREE;
+ return (!flag_really_no_inline && DECL_DECLARED_INLINE_P (fn)
+ && DECL_EXTERNAL (fn));
}
int
{
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 suppressed 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))
- goto cannot_inline;
+ 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))
- goto cannot_inline;
+ {
+ 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
compilation, and we can't inline it as a tree. */
put_pending_sizes (t);
if (t)
- goto cannot_inline;
+ {
+ if (do_warning)
+ warning ("%Jfunction '%F' can never be inlined because it has "
+ "pending sizes", fn, fn);
+ goto cannot_inline;
+ }
}
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)
- 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 (do_warning)
+ warning ("%Jnested function '%F' can never be inlined because it "
+ "has possibly saved pending sizes", fn, fn);
+ goto cannot_inline;
+ }
}
- if (walk_tree (&DECL_SAVED_TREE (fn), inline_forbidden_p, fn, NULL))
- goto cannot_inline;
-
return 0;
cannot_inline:
if (c_common_init () == false)
return false;
- lang_expand_decl_stmt = c_expand_decl_stmt;
-
/* 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;
}
- VARRAY_TREE_INIT (deferred_fns, 32, "deferred_fns");
-
return true;
}
-/* Register a function tree, so that its optimization and conversion
- to RTL is only done at the end of the compilation. */
-
-int
-defer_fn (tree fn)
-{
- VARRAY_PUSH_TREE (deferred_fns, fn);
-
- return 1;
-}
-
-/* Expand deferred functions for C and ObjC. */
-
-static void
-expand_deferred_fns (void)
-{
- unsigned int i;
- bool reconsider;
-
- do
- {
- reconsider = false;
- for (i = 0; i < VARRAY_ACTIVE_SIZE (deferred_fns); i++)
- {
- tree decl = VARRAY_TREE (deferred_fns, i);
-
- if (TREE_ASM_WRITTEN (decl))
- continue;
-
- /* "extern inline" says the symbol exists externally,
- which means we should *never* expand it locally
- unless we're actually inlining it. */
- /* ??? Why did we queue these in the first place? */
- if (DECL_DECLARED_INLINE_P (decl) && DECL_EXTERNAL (decl))
- continue;
-
- /* With flag_keep_inline_functions, we're emitting everything,
- so we never need to reconsider. */
- if (flag_keep_inline_functions)
- ;
- /* Must emit all public functions. C doesn't have COMDAT
- functions, so we don't need to check that, like C++. */
- else if (TREE_PUBLIC (decl))
- reconsider = true;
- /* Must emit if the symbol is referenced. */
- else if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
- reconsider = true;
- else
- continue;
-
- c_expand_deferred_function (decl);
- }
- }
- while (reconsider);
-
- deferred_fns = 0;
-}
-
-static tree
-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);
- tree body;
-
- start_function (void_list_node_1,
- build_nt (CALL_EXPR, fnname,
- tree_cons (NULL_TREE, NULL_TREE, void_list_node_1),
- NULL_TREE),
- NULL_TREE);
- store_parm_decls ();
-
- current_function_cannot_inline
- = "static constructors and destructors cannot be inlined";
-
- body = c_begin_compound_stmt ();
-
- pushlevel (0);
- clear_last_expr ();
- add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
-
- return body;
-}
-
-static void
-finish_cdtor (tree body)
-{
- tree scope;
- tree block;
-
- scope = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
- block = poplevel (0, 0, 0);
- SCOPE_STMT_BLOCK (TREE_PURPOSE (scope)) = block;
- SCOPE_STMT_BLOCK (TREE_VALUE (scope)) = block;
-
- RECHAIN_STMTS (body, COMPOUND_BODY (body));
-
- finish_function (0, 0);
-}
-
-/* Called at end of parsing, but before end-of-file processing. */
-
-void
-c_objc_common_finish_file (void)
-{
- 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 ();
-
- if (flag_unit_at_a_time)
- {
- cgraph_finalize_compilation_unit ();
- cgraph_optimize ();
- }
- else
- expand_deferred_fns ();
-
- if (static_ctors)
- {
- tree body = start_cdtor ('I');
-
- for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
- c_expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
- NULL_TREE));
-
- finish_cdtor (body);
- }
-
- if (static_dtors)
- {
- tree body = start_cdtor ('D');
-
- for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
- c_expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
- NULL_TREE));
-
- finish_cdtor (body);
- }
-
- {
- int flags;
- FILE *stream = dump_begin (TDI_all, &flags);
-
- if (stream)
- {
- dump_node (getdecls (), flags & ~TDF_SLIM, stream);
- dump_end (TDI_all, stream);
- }
- }
-}
-
/* Called during diagnostic message formatting process to print a
source-level entity onto BUFFER. The meaning of the format specifiers
is as follows:
c_tree_printer (pretty_printer *pp, text_info *text)
{
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;
switch (*text->format_spec)
{
case 'D':
case 'F':
+ if (DECL_NAME (t))
+ n = lang_hooks.decl_printable_name (t, 2);
+ break;
+
case 'T':
- {
- const char *n = DECL_NAME (t)
- ? (*lang_hooks.decl_printable_name) (t, 2)
- : "({anonymous})";
- pp_string (pp, n);
- }
- return true;
+ if (TYPE_P (t))
+ name = TYPE_NAME (t);
+ else
+ abort ();
+ 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)
- {
- pp_string (pp, IDENTIFIER_POINTER (t));
- return true;
- }
- return false;
+ if (TREE_CODE (t) == IDENTIFIER_NODE)
+ n = IDENTIFIER_POINTER (t);
+ else
+ return false;
+ break;
default:
return false;
}
+
+ pp_string (cpp, n);
+ return true;
+}
+
+tree
+c_objc_common_truthvalue_conversion (tree expr)
+{
+ retry:
+ switch (TREE_CODE (TREE_TYPE (expr)))
+ {
+ case ARRAY_TYPE:
+ expr = default_conversion (expr);
+ if (TREE_CODE (TREE_TYPE (expr)) != ARRAY_TYPE)
+ goto retry;
+
+ error ("used array that cannot be converted to pointer where scalar is required");
+ return error_mark_node;
+
+ case RECORD_TYPE:
+ error ("used struct type value where scalar is required");
+ return error_mark_node;
+
+ case UNION_TYPE:
+ error ("used union type value where scalar is required");
+ return error_mark_node;
+ default:
+ break;
+ }
+
+ return c_common_truthvalue_conversion (expr);
}
-#include "gt-c-objc-common.h"
+/* 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);
+}
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