GCC Middle and Back End API Reference
lim_aux_data Struct Reference
Collaboration diagram for lim_aux_data:

Data Fields

class loopmax_loop
 
class looptgt_loop
 
class loopalways_executed_in
 
unsigned cost
 
unsigned ref
 
vec< gimple * > depends
 

Detailed Description

Loop invariant motion. Copyright (C) 2003-2025 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it 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 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <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

◆ cost

◆ depends

vec<gimple *> lim_aux_data::depends

Referenced by set_level().

◆ max_loop

◆ ref

◆ tgt_loop

class loop* lim_aux_data::tgt_loop

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