diff options
Diffstat (limited to 'gcc/config/epiphany/mode-switch-use.c')
-rw-r--r-- | gcc/config/epiphany/mode-switch-use.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/gcc/config/epiphany/mode-switch-use.c b/gcc/config/epiphany/mode-switch-use.c new file mode 100644 index 0000000..a7020f4 --- /dev/null +++ b/gcc/config/epiphany/mode-switch-use.c @@ -0,0 +1,91 @@ +/* Insert USEs in instructions that require mode switching. + This should probably be merged into mode-switching.c . + Copyright (C) 2011 Free Software Foundation, Inc. + Contributed by Embecosm on behalf of Adapteva, 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/>. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "rtl.h" +#include "function.h" +#include "emit-rtl.h" +#include "tree-pass.h" +#include "insn-attr.h" +#include "insn-config.h" +#include "recog.h" +#include "tm_p.h" +#include "df.h" + +#ifndef TARGET_INSERT_MODE_SWITCH_USE +#define TARGET_INSERT_MODE_SWITCH_USE NULL +#endif + +static unsigned int +insert_uses (void) +{ + static const int num_modes[] = NUM_MODES_FOR_MODE_SWITCHING; +#define N_ENTITIES ARRAY_SIZE (num_modes) + int e; + void (*target_insert_mode_switch_use) (rtx insn, int, int) + = TARGET_INSERT_MODE_SWITCH_USE; + + for (e = N_ENTITIES - 1; e >= 0; e--) + { + int no_mode = num_modes[e]; + rtx insn; + int mode; + + if (!OPTIMIZE_MODE_SWITCHING (e)) + continue; + for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) + { + if (!INSN_P (insn)) + continue; + mode = MODE_NEEDED (e, insn); + if (mode == no_mode) + continue; + if (target_insert_mode_switch_use) + { + target_insert_mode_switch_use (insn, e, mode); + df_insn_rescan (insn); + } + } + } + return 0; +} + +struct rtl_opt_pass pass_mode_switch_use = +{ + { + RTL_PASS, + "mode_switch_use", /* name */ + NULL, /* gate */ + insert_uses, /* execute */ + NULL, /* sub */ + NULL, /* next */ + 0, /* static_pass_number */ + TV_NONE, /* tv_id */ + 0, /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + 0, /* todo_flags_finish */ + } +}; |