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/* Insn note definitions.

   Copyright (C) 2004, 2005, 2007 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

.  */

/* This file defines all the codes that may appear in the

   NOTE_LINE_NUMBER field of a NOTE insn for kinds of notes that are

   not line numbers.  Source files define DEF_INSN_NOTE appropriately

   before including this file.

   We are slowly removing the concept of insn-chain notes from the

   compiler.  Adding new codes to this file is STRONGLY DISCOURAGED.

   If you think you need one, look for other ways to express what you

   mean, such as register notes or bits in the basic-block structure.  */

/* Shorthand.  */

#define INSN_NOTE(NAME) DEF_INSN_NOTE (NOTE_INSN_##NAME)

/* This note is used to get rid of an insn when it isn't safe to patch

   the insn out of the chain.  */

INSN_NOTE (DELETED)

/* Generated in place of user-declared labels when they are deleted.  */

INSN_NOTE (DELETED_LABEL)

/* These are used to mark the beginning and end of a lexical block.

   See NOTE_BLOCK and reorder_blocks.  */

INSN_NOTE (BLOCK_BEG)

INSN_NOTE (BLOCK_END)

/* These mark the extremes of a loop.  */

INSN_NOTE (LOOP_BEG)

INSN_NOTE (LOOP_END)

/* This note indicates the start of the real body of the function,

   i.e. the point just after all of the parms have been moved into

   their homes, etc.  */

INSN_NOTE (FUNCTION_BEG)

/* This kind of note is generated at the end of the function body,

   just before the return insn or return label.  In an optimizing

   compilation it is deleted by the first jump optimization, after

   enabling that optimizer to determine whether control can fall

   off the end of the function body without a return statement.  */

INSN_NOTE (FUNCTION_END)

/* This marks the point immediately after the last prologue insn.  */

INSN_NOTE (PROLOGUE_END)

/* This marks the point immediately prior to the first epilogue insn.  */

INSN_NOTE (EPILOGUE_BEG)

/* These note where exception handling regions begin and end.

   Uses NOTE_EH_HANDLER to identify the region in question.  */

INSN_NOTE (EH_REGION_BEG)

INSN_NOTE (EH_REGION_END)

/* Generated whenever a duplicate line number note is output.

   For example, one is output after the end of an inline function,

   in order to prevent the line containing the inline call from

   being counted twice in gcov.  */

INSN_NOTE (REPEATED_LINE_NUMBER)

/* The location of a variable.  */

INSN_NOTE (VAR_LOCATION)

/* Record the expected value of a register at a location.  Uses

   NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)).  */

INSN_NOTE (EXPECTED_VALUE)

/* Record the struct for the following basic block.  Uses

   NOTE_BASIC_BLOCK.  FIXME: Redundant with the basic block pointer

   now included in every insn.  */

INSN_NOTE (BASIC_BLOCK)

/* Mark the inflection point in the instruction stream where we switch

   between hot and cold text sections.  */

INSN_NOTE (SWITCH_TEXT_SECTIONS)

#undef INSN_NOTE