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- /* Insn note definitions.
- Copyright (C) 2004-2020 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/>. */
-
- /* 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)
- /* Similarly, but for labels that have been present in debug stmts
- earlier and thus will only appear with -g. These must use different
- label namespace. */
- INSN_NOTE (DELETED_DEBUG_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)
-
- /* 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 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)
-
- /* The location of a variable. */
- INSN_NOTE (VAR_LOCATION)
-
- /* The beginning of a statement. */
- INSN_NOTE (BEGIN_STMT)
-
- /* The entry point for an inlined function. Its NOTE_BLOCK references
- the lexical block whose abstract origin is the inlined function. */
- INSN_NOTE (INLINE_ENTRY)
-
- /* Record the struct for the following basic block. Uses
- NOTE_BASIC_BLOCK. FIXME: Redundant with the basic block pointer
- now included in every insn. NOTE: If there's no CFG anymore, in other words,
- if BLOCK_FOR_INSN () == NULL, NOTE_BASIC_BLOCK cannot be considered reliable
- anymore. */
- 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)
-
- /* When emitting dwarf2 frame information, contains a directive that
- should be emitted. */
- INSN_NOTE (CFI)
-
- /* When emitting dwarf2 frame information, contains the number of a debug
- label that should be emitted. */
- INSN_NOTE (CFI_LABEL)
-
- /* This note indicates that the function context must be updated if
- the Setjmp/Longjmp exception mechanism is used. */
- INSN_NOTE (UPDATE_SJLJ_CONTEXT)
-
- #undef INSN_NOTE
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