ffe1468659
* function.c (bb_active_p): Delete. (dup_block_and_redirect, active_insn_between): New functions. (convert_jumps_to_returns, emit_return_for_exit): New functions, split out from.. (thread_prologue_and_epilogue_insns): ..here. Delete shadowing variables. Don't do prologue register clobber tests when shrink wrapping already failed. Delete all last_bb_active code. Instead compute tail block candidates for duplicating exit path. Remove these from antic set. Duplicate tails when reached from both blocks needing a prologue/epilogue and blocks not needing such. * ifcvt.c (dead_or_predicable): Test both flag_shrink_wrap and HAVE_simple_return. * bb-reorder.c (get_uncond_jump_length): Make global. * bb-reorder.h (get_uncond_jump_length): Declare. * cfgrtl.c (rtl_create_basic_block): Comment typo fix. (rtl_split_edge): Likewise. Warning fix. (rtl_duplicate_bb): New function. (rtl_cfg_hooks): Enable can_duplicate_block_p and duplicate_block. * Makefile.in (function.o): Update dependencies. From-SVN: r181188
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/* Basic block reordering routines for the GNU compiler.
|
|
Copyright (C) 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010
|
|
Free Software Foundation, Inc.
|
|
|
|
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 3, or (at your option)
|
|
any later version.
|
|
|
|
GCC 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 GCC; see the file COPYING3. If not see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef GCC_BB_REORDER
|
|
#define GCC_BB_REORDER
|
|
|
|
/* Target-specific globals. */
|
|
struct target_bb_reorder {
|
|
/* Length of unconditional jump instruction. */
|
|
int x_uncond_jump_length;
|
|
};
|
|
|
|
extern GTY(()) struct target_bb_reorder default_target_bb_reorder;
|
|
#if SWITCHABLE_TARGET
|
|
extern struct target_bb_reorder *this_target_bb_reorder;
|
|
#else
|
|
#define this_target_bb_reorder (&default_target_bb_reorder)
|
|
#endif
|
|
|
|
extern int get_uncond_jump_length (void);
|
|
|
|
#endif
|