gcc/dojump.h

   1 /* Export function prototypes from dojump.c.
   2    Copyright (C) 2015-2020 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 #ifndef GCC_DOJUMP_H
  21 #define GCC_DOJUMP_H
  22
  23 /* At the start of a function, record that we have no previously-pushed
  24    arguments waiting to be popped.  */
  25 extern void init_pending_stack_adjust (void);
  26
  27 /* Discard any pending stack adjustment.  */
  28 extern void discard_pending_stack_adjust (void);
  29
  30 /* When exiting from function, if safe, clear out any pending stack adjust
  31    so the adjustment won't get done.  */
  32 extern void clear_pending_stack_adjust (void);
  33
  34 /* Pop any previously-pushed arguments that have not been popped yet.  */
  35 extern void do_pending_stack_adjust (void);
  36
  37 /* Struct for saving/restoring of pending_stack_adjust/stack_pointer_delta
  38    values.  */
  39
  40 class saved_pending_stack_adjust
  41 {
  42 public:
  43   /* Saved value of pending_stack_adjust.  */
  44   poly_int64 x_pending_stack_adjust;
  45
  46   /* Saved value of stack_pointer_delta.  */
  47   poly_int64 x_stack_pointer_delta;
  48 };
  49
  50 /* Remember pending_stack_adjust/stack_pointer_delta.
  51    To be used around code that may call do_pending_stack_adjust (),
  52    but the generated code could be discarded e.g. using delete_insns_since.  */
  53
  54 extern void save_pending_stack_adjust (saved_pending_stack_adjust *);
  55
  56 /* Restore the saved pending_stack_adjust/stack_pointer_delta.  */
  57
  58 extern void restore_pending_stack_adjust (saved_pending_stack_adjust *);
  59
  60 extern bool split_comparison (enum rtx_code, machine_mode,
  61                               enum rtx_code *, enum rtx_code *);
  62
  63 /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero.  */
  64 extern void jumpif (tree exp, rtx_code_label *label, profile_probability prob);
  65 extern void jumpif_1 (enum tree_code, tree, tree, rtx_code_label *,
  66                       profile_probability);
  67
  68 /* Generate code to evaluate EXP and jump to LABEL if the value is zero.  */
  69 extern void jumpifnot (tree exp, rtx_code_label *label,
  70                        profile_probability prob);
  71 extern void jumpifnot_1 (enum tree_code, tree, tree, rtx_code_label *,
  72                          profile_probability);
  73
  74 extern void do_compare_rtx_and_jump (rtx, rtx, enum rtx_code, int,
  75                                      machine_mode, rtx, rtx_code_label *,
  76                                      rtx_code_label *, profile_probability);
  77
  78 #endif /* GCC_DOJUMP_H */