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1 /* Insn note definitions.
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2 Copyright (C) 2004, 2005, 2007 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 /* This file defines all the codes that may appear in the
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21 NOTE_LINE_NUMBER field of a NOTE insn for kinds of notes that are
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22 not line numbers. Source files define DEF_INSN_NOTE appropriately
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23 before including this file.
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24
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25 We are slowly removing the concept of insn-chain notes from the
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26 compiler. Adding new codes to this file is STRONGLY DISCOURAGED.
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27 If you think you need one, look for other ways to express what you
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28 mean, such as register notes or bits in the basic-block structure. */
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29
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30 /* Shorthand. */
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31 #define INSN_NOTE(NAME) DEF_INSN_NOTE (NOTE_INSN_##NAME)
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32
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33 /* This note is used to get rid of an insn when it isn't safe to patch
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34 the insn out of the chain. */
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35 INSN_NOTE (DELETED)
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36
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37 /* Generated in place of user-declared labels when they are deleted. */
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38 INSN_NOTE (DELETED_LABEL)
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39
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40 /* These are used to mark the beginning and end of a lexical block.
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41 See NOTE_BLOCK and reorder_blocks. */
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42 INSN_NOTE (BLOCK_BEG)
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43 INSN_NOTE (BLOCK_END)
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44
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45 /* This note indicates the start of the real body of the function,
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46 i.e. the point just after all of the parms have been moved into
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47 their homes, etc. */
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48 INSN_NOTE (FUNCTION_BEG)
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49
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50 /* This marks the point immediately after the last prologue insn. */
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51 INSN_NOTE (PROLOGUE_END)
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52
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53 /* This marks the point immediately prior to the first epilogue insn. */
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54 INSN_NOTE (EPILOGUE_BEG)
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55
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56 /* These note where exception handling regions begin and end.
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57 Uses NOTE_EH_HANDLER to identify the region in question. */
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58 INSN_NOTE (EH_REGION_BEG)
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59 INSN_NOTE (EH_REGION_END)
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60
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61 /* The location of a variable. */
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62 INSN_NOTE (VAR_LOCATION)
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63
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64 /* Record the struct for the following basic block. Uses
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65 NOTE_BASIC_BLOCK. FIXME: Redundant with the basic block pointer
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66 now included in every insn. */
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67 INSN_NOTE (BASIC_BLOCK)
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68
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69 /* Mark the inflection point in the instruction stream where we switch
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70 between hot and cold text sections. */
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71 INSN_NOTE (SWITCH_TEXT_SECTIONS)
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72
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73 #undef INSN_NOTE
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