Collaboration diagram for lim_aux_data:

Data Fields
class loop *	max_loop

class loop *	tgt_loop

class loop *	always_executed_in

unsigned	cost

unsigned	ref

vec< gimple * >	depends

Detailed Description

Loop invariant motion.
   Copyright (C) 2003-2024 Free Software Foundation, Inc.

This file is part of GCC.

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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
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<http://www.gnu.org/licenses/>.

TODO:  Support for predicated code motion.  I.e.

while (1)
  {
    if (cond)
      {
        a = inv;
        something;
      }
  }

Where COND and INV are invariants, but evaluating INV may trap or be
invalid from some other reason if !COND.  This may be transformed to

if (cond)
  a = inv;
while (1)
  {
    if (cond)
      something;
  }

The auxiliary data kept for each statement.

Field Documentation

◆ always_executed_in

class loop* lim_aux_data::always_executed_in

Referenced by compute_invariantness(), and ref_always_accessed::operator()().

◆ cost

unsigned lim_aux_data::cost

Referenced by add_dependency(), compute_invariantness(), determine_max_movement(), and move_computations_worker().

◆ depends

vec<gimple *> lim_aux_data::depends

Referenced by set_level().

◆ max_loop

class loop* lim_aux_data::max_loop

Referenced by add_dependency(), compute_invariantness(), determine_max_movement(), execute_sm(), outermost_invariant_loop(), set_level(), and set_profitable_level().

◆ ref

unsigned lim_aux_data::ref

Referenced by determine_max_movement(), execute_sm(), gather_mem_refs_stmt(), ref_always_accessed_p(), and ref_indep_loop_p().

◆ tgt_loop

class loop* lim_aux_data::tgt_loop

Referenced by execute_sm(), move_computations_worker(), and set_level().

The documentation for this struct was generated from the following file:

tree-ssa-loop-im.cc

Data Fields