hooks.c: New file.

* hooks.c: New file.
* hooks.h: New file.
* Makefile.in (HOOKS_H): New.
(TARGET_DEF_H): Added $(HOOKS_H).
(OBJS): Added hooks.o.
(cfgcleanup.o, bb-reorder.o): Added target.h.
(hooks.o): Added dependencies.
* target-def.h (TARGET_CANNOT_MODIFY_JUMPS_P): New, added to...
(TARGET_INITIALIZER): this.
* doc/tm.texi (TARGET_CANNOT_MODIFY_JUMPS_P): Document.
* target.h (struct gcc_target): Added cannot_modify_jumps_p.
* bb-reorder.c: Include target.h.
(reorder_basic_blocks): Skip if cannot modify jumps.
* cfgcleanup.c: Include target.h.
(try_optimize_cfg): Skip merge blocking if cannot modify jumps.

From-SVN: r49627

1 files changed, 34 insertions, 0 deletions

diff --git a/gcc/hooks.c b/gcc/hooks.c
new file mode 100644
index 00000000000..387f4db961a
--- /dev/null
+++ b/gcc/hooks.c
@@ -0,0 +1,34 @@
+/* General-purpose hooks.
+   Copyright (C) 2002 Free Software Foundation, Inc.
+
+This program 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.
+
+This program 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 this program; if not, write to the Free Software
+Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ In other words, you are welcome to use, share and improve this program.
+ You are forbidden to forbid anyone else to use, share and improve
+ what you give them.   Help stamp out software-hoarding!  */
+
+/* This file contains generic hooks that can be used as defaults for
+   target or language-dependent hook initializers.  */
+
+#include "config.h"
+#include "system.h"
+#include "hooks.h"
+
+/* Generic hook that takes no arguments and returns false.  */
+bool
+hook_void_bool_false ()
+{
+  return false;
+}