gcc/run-rtl-passes.c

   1 /* run-rtl-passes.c - Run RTL passes directly from frontend
   2    Copyright (C) 2016-2020 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 "target.h"
  24 #include "rtl.h"
  25 #include "function.h"
  26 #include "basic-block.h"
  27 #include "tree-pass.h"
  28 #include "context.h"
  29 #include "pass_manager.h"
  30 #include "bitmap.h"
  31 #include "df.h"
  32 #include "regs.h"
  33 #include "output.h"
  34 #include "debug.h" /* for debug_hooks.  */
  35 #include "insn-attr-common.h" /* for INSN_SCHEDULING.  */
  36 #include "insn-attr.h" /* for init_sched_attrs.  */
  37 #include "run-rtl-passes.h"
  38
  39 /* Run the backend passes, starting at the given pass.
  40    Take ownership of INITIAL_PASS_NAME.  */
  41
  42 void
  43 run_rtl_passes (char *initial_pass_name)
  44 {
  45   cfun->pass_startwith = initial_pass_name;
  46   max_regno = max_reg_num ();
  47
  48   /* cgraphunit.c normally handles this.  */
  49   switch_to_section (text_section);
  50   (*debug_hooks->assembly_start) ();
  51
  52   if (initial_pass_name)
  53     {
  54       /* Pass "expand" normally sets this up.  */
  55 #ifdef INSN_SCHEDULING
  56       init_sched_attrs ();
  57 #endif
  58       bitmap_obstack_initialize (NULL);
  59       bitmap_obstack_initialize (&reg_obstack);
  60       opt_pass *rest_of_compilation
  61         = g->get_passes ()->get_rest_of_compilation ();
  62       gcc_assert (rest_of_compilation);
  63       execute_pass_list (cfun, rest_of_compilation);
  64
  65       opt_pass *clean_slate = g->get_passes ()->get_clean_slate ();
  66       gcc_assert (clean_slate);
  67       execute_pass_list (cfun, clean_slate);
  68       bitmap_obstack_release (&reg_obstack);
  69     }
  70   else
  71     {
  72       opt_pass *clean_slate = g->get_passes ()->get_clean_slate ();
  73       gcc_assert (clean_slate);
  74       execute_pass_list (cfun, clean_slate);
  75     }
  76
  77   cfun->curr_properties |= PROP_rtl;
  78   free (initial_pass_name);
  79 }