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jlechner |
/* Insn note definitions.
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Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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/* This file defines all the codes that may appear in the
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NOTE_LINE_NUMBER field of a NOTE insn for kinds of notes that are
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not line numbers. Source files define DEF_INSN_NOTE appropriately
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before including this file.
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We are slowly removing the concept of insn-chain notes from the
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compiler. Adding new codes to this file is STRONGLY DISCOURAGED.
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If you think you need one, look for other ways to express what you
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mean, such as register notes or bits in the basic-block structure. */
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/* Shorthand. */
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#define INSN_NOTE(NAME) DEF_INSN_NOTE (NOTE_INSN_##NAME)
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/* This note is used to get rid of an insn when it isn't safe to patch
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the insn out of the chain. */
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INSN_NOTE (DELETED)
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/* Generated in place of user-declared labels when they are deleted. */
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INSN_NOTE (DELETED_LABEL)
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/* These are used to mark the beginning and end of a lexical block.
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See NOTE_BLOCK and reorder_blocks. */
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INSN_NOTE (BLOCK_BEG)
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INSN_NOTE (BLOCK_END)
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/* These mark the extremes of a loop. */
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INSN_NOTE (LOOP_BEG)
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INSN_NOTE (LOOP_END)
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/* This note indicates the start of the real body of the function,
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i.e. the point just after all of the parms have been moved into
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their homes, etc. */
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INSN_NOTE (FUNCTION_BEG)
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/* This kind of note is generated at the end of the function body,
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just before the return insn or return label. In an optimizing
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compilation it is deleted by the first jump optimization, after
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enabling that optimizer to determine whether control can fall
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off the end of the function body without a return statement. */
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INSN_NOTE (FUNCTION_END)
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/* This marks the point immediately after the last prologue insn. */
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INSN_NOTE (PROLOGUE_END)
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/* This marks the point immediately prior to the first epilogue insn. */
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INSN_NOTE (EPILOGUE_BEG)
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/* These note where exception handling regions begin and end.
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Uses NOTE_EH_HANDLER to identify the region in question. */
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INSN_NOTE (EH_REGION_BEG)
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INSN_NOTE (EH_REGION_END)
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/* Generated whenever a duplicate line number note is output.
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For example, one is output after the end of an inline function,
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in order to prevent the line containing the inline call from
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being counted twice in gcov. */
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INSN_NOTE (REPEATED_LINE_NUMBER)
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/* The location of a variable. */
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INSN_NOTE (VAR_LOCATION)
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/* Record the expected value of a register at a location. Uses
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NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
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INSN_NOTE (EXPECTED_VALUE)
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/* Record the struct for the following basic block. Uses
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NOTE_BASIC_BLOCK. FIXME: Redundant with the basic block pointer
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now included in every insn. */
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INSN_NOTE (BASIC_BLOCK)
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/* Mark the inflection point in the instruction stream where we switch
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between hot and cold text sections. */
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INSN_NOTE (SWITCH_TEXT_SECTIONS)
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#undef INSN_NOTE
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