gcc/common/config/xtensa/xtensa-common.c

   1 /* Common hooks for Tensilica's Xtensa architecture.
   2    Copyright (C) 2001-2019 Free Software Foundation, Inc.
   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
  20 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "tm.h"
  24 #include "common/common-target.h"
  25 #include "common/common-target-def.h"
  26
  27 /* Implement TARGET_OPTION_OPTIMIZATION_TABLE.  */
  28
  29 static const struct default_options xtensa_option_optimization_table[] =
  30   {
  31     /* Reordering blocks for Xtensa is not a good idea unless the
  32        compiler understands the range of conditional branches.
  33        Currently all branch relaxation for Xtensa is handled in the
  34        assembler, so GCC cannot do a good job of reordering blocks.
  35        Do not enable reordering unless it is explicitly requested.  */
  36     { OPT_LEVELS_ALL, OPT_freorder_blocks, NULL, 0 },
  37     { OPT_LEVELS_NONE, 0, NULL, 0 }
  38   };
  39
  40 #undef TARGET_DEFAULT_TARGET_FLAGS
  41 #define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT)
  42 #undef TARGET_OPTION_OPTIMIZATION_TABLE
  43 #define TARGET_OPTION_OPTIMIZATION_TABLE xtensa_option_optimization_table
  44
  45 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;