projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 76beabf4 | 1 | /* Description of target passes for AVR. |
| a5544970 | 2 | Copyright (C) 2016-2019 Free Software Foundation, Inc. */ |
| 76beabf4 GJL |
3 | |
| 4 | /* This file is part of GCC. | |
| 5 | ||
| 6 | GCC is free software; you can redistribute it and/or modify it under | |
| 7 | the terms of the GNU General Public License as published by the Free | |
| 8 | Software Foundation; either version 3, or (at your option) any later | |
| 9 | version. | |
| 10 | ||
| 11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with GCC; see the file COPYING3. If not see | |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 19 | ||
| 63866e04 GJL |
20 | /* An analysis pass that runs prior to prologue / epilogue generation. |
| 21 | Computes cfun->machine->gasisr.maybe which is used in prologue and | |
| 22 | epilogue generation provided -mgas-isr-prologues is on. */ | |
| 23 | ||
| 24 | INSERT_PASS_BEFORE (pass_thread_prologue_and_epilogue, 1, avr_pass_pre_proep); | |
| 25 | ||
| b6735d9a GJL |
26 | /* This avr-specific pass (re)computes insn notes, in particular REG_DEAD |
| 27 | notes which are used by `avr.c::reg_unused_after' and branch offset | |
| 28 | computations. These notes must be correct, i.e. there must be no | |
| 29 | dangling REG_DEAD notes; otherwise wrong code might result, cf. PR64331. | |
| 30 | ||
| 31 | DF needs (correct) CFG, hence right before free_cfg is the last | |
| 32 | opportunity to rectify notes. */ | |
| 33 | ||
| 34 | INSERT_PASS_BEFORE (pass_free_cfg, 1, avr_pass_recompute_notes); | |
| 35 | ||
| 078134e5 GJL |
36 | /* casesi uses a SImode switch index which is quite costly as most code will |
| 37 | work on HImode or QImode. The following pass runs right after .expand and | |
| 38 | tries to fix such situations by operating on the original mode. This | |
| 39 | reduces code size and register pressure. | |
| 40 | ||
| 41 | The assertion is that the code generated by casesi is unaltered and a | |
| 42 | a sign-extend or zero-extend from QImode or HImode precedes the casesi | |
| 43 | insns withaout any insns in between. */ | |
| 44 | ||
| 45 | INSERT_PASS_AFTER (pass_expand, 1, avr_pass_casesi); |