queued_debug_insn_change Struct Reference
Collaboration diagram for queued_debug_insn_change:
Data Fields | |
| struct queued_debug_insn_change * | next |
| rtx | insn |
| rtx * | loc |
| rtx | new_rtx |
Detailed Description
Copy propagation on hard registers for the GNU compiler. Copyright (C) 2000-2013 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/>.
The following code does forward propagation of hard register copies. The object is to eliminate as many dependencies as possible, so that we have the most scheduling freedom. As a side effect, we also clean up some silly register allocation decisions made by reload. This code may be obsoleted by a new register allocator.
DEBUG_INSNs aren't changed right away, as doing so might extend the lifetime of a register and get the DEBUG_INSN subsequently reset. So they are queued instead, and updated only when the register is used in some subsequent real insn before it is set.
Field Documentation
| rtx queued_debug_insn_change::insn |
Referenced by apply_debug_insn_changes(), and replace_oldest_value_reg().
| rtx* queued_debug_insn_change::loc |
Referenced by apply_debug_insn_changes(), replace_oldest_value_addr(), and replace_oldest_value_reg().
| rtx queued_debug_insn_change::new_rtx |
Referenced by apply_debug_insn_changes(), and replace_oldest_value_reg().
| struct queued_debug_insn_change* queued_debug_insn_change::next |
Referenced by apply_debug_insn_changes(), free_debug_insn_changes(), kill_value_one_regno(), and replace_oldest_value_reg().
The documentation for this struct was generated from the following file:
