gcc/tree-scalar-evolution.h

   1 /* Scalar evolution detector.
   2    Copyright (C) 2003-2023 Free Software Foundation, Inc.
   3    Contributed by Sebastian Pop <s.pop@laposte.net>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GCC_TREE_SCALAR_EVOLUTION_H
  22 #define GCC_TREE_SCALAR_EVOLUTION_H
  23
  24 extern tree number_of_latch_executions (class loop *);
  25 extern gcond *get_loop_exit_condition (const class loop *);
  26 extern gcond *get_loop_exit_condition (const_edge);
  27
  28 extern void scev_initialize (void);
  29 extern bool scev_initialized_p (void);
  30 extern void scev_reset (void);
  31 extern void scev_reset_htab (void);
  32 extern void scev_finalize (void);
  33 extern tree analyze_scalar_evolution (class loop *, tree);
  34 extern tree instantiate_scev (edge, class loop *, tree);
  35 extern tree resolve_mixers (class loop *, tree, bool *);
  36 extern void gather_stats_on_scev_database (void);
  37 extern bool final_value_replacement_loop (class loop *);
  38 extern unsigned int scev_const_prop (void);
  39 extern bool expression_expensive_p (tree, bool *);
  40 extern bool simple_iv_with_niters (class loop *, class loop *, tree,
  41                                    struct affine_iv *, tree *, bool);
  42 extern bool simple_iv (class loop *, class loop *, tree, struct affine_iv *,
  43                        bool);
  44 extern bool iv_can_overflow_p (class loop *, tree, tree, tree);
  45 extern tree compute_overall_effect_of_inner_loop (class loop *, tree);
  46
  47 /* Returns the basic block preceding LOOP, or the CFG entry block when
  48    the loop is function's body.  */
  49
  50 inline basic_block
  51 block_before_loop (loop_p loop)
  52 {
  53   edge preheader = loop_preheader_edge (loop);
  54   return (preheader ? preheader->src : ENTRY_BLOCK_PTR_FOR_FN (cfun));
  55 }
  56
  57 /* Analyze all the parameters of the chrec that were left under a
  58    symbolic form.  LOOP is the loop in which symbolic names have to
  59    be analyzed and instantiated.  */
  60
  61 inline tree
  62 instantiate_parameters (class loop *loop, tree chrec)
  63 {
  64   return instantiate_scev (loop_preheader_edge (loop), loop, chrec);
  65 }
  66
  67 /* Returns the loop of the polynomial chrec CHREC.  */
  68
  69 inline class loop *
  70 get_chrec_loop (const_tree chrec)
  71 {
  72   return get_loop (cfun, CHREC_VARIABLE (chrec));
  73 }
  74
  75 #endif  /* GCC_TREE_SCALAR_EVOLUTION_H  */