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

Data Fields

struct queued_debug_insn_changenext
rtx insn
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
   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
   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
rtx* queued_debug_insn_change::loc
rtx queued_debug_insn_change::new_rtx
struct queued_debug_insn_change* queued_debug_insn_change::next

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