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/* Description of target passes for AVR.
Copyright (C) 2016 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/>. */
/* This avr-specific pass (re)computes insn notes, in particular REG_DEAD
notes which are used by `avr.c::reg_unused_after' and branch offset
computations. These notes must be correct, i.e. there must be no
dangling REG_DEAD notes; otherwise wrong code might result, cf. PR64331.
DF needs (correct) CFG, hence right before free_cfg is the last
opportunity to rectify notes. */
INSERT_PASS_BEFORE (pass_free_cfg, 1, avr_pass_recompute_notes);
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