1*404b540aSrobert/* Insn note definitions. 2*404b540aSrobert Copyright (C) 2004, 2005 Free Software Foundation, Inc. 3*404b540aSrobert 4*404b540aSrobertThis file is part of GCC. 5*404b540aSrobert 6*404b540aSrobertGCC is free software; you can redistribute it and/or modify it under 7*404b540aSrobertthe terms of the GNU General Public License as published by the Free 8*404b540aSrobertSoftware Foundation; either version 2, or (at your option) any later 9*404b540aSrobertversion. 10*404b540aSrobert 11*404b540aSrobertGCC is distributed in the hope that it will be useful, but WITHOUT ANY 12*404b540aSrobertWARRANTY; without even the implied warranty of MERCHANTABILITY or 13*404b540aSrobertFITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14*404b540aSrobertfor more details. 15*404b540aSrobert 16*404b540aSrobertYou should have received a copy of the GNU General Public License 17*404b540aSrobertalong with GCC; see the file COPYING. If not, write to the Free 18*404b540aSrobertSoftware Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 19*404b540aSrobert02110-1301, USA. */ 20*404b540aSrobert 21*404b540aSrobert/* This file defines all the codes that may appear in the 22*404b540aSrobert NOTE_LINE_NUMBER field of a NOTE insn for kinds of notes that are 23*404b540aSrobert not line numbers. Source files define DEF_INSN_NOTE appropriately 24*404b540aSrobert before including this file. 25*404b540aSrobert 26*404b540aSrobert We are slowly removing the concept of insn-chain notes from the 27*404b540aSrobert compiler. Adding new codes to this file is STRONGLY DISCOURAGED. 28*404b540aSrobert If you think you need one, look for other ways to express what you 29*404b540aSrobert mean, such as register notes or bits in the basic-block structure. */ 30*404b540aSrobert 31*404b540aSrobert/* Shorthand. */ 32*404b540aSrobert#define INSN_NOTE(NAME) DEF_INSN_NOTE (NOTE_INSN_##NAME) 33*404b540aSrobert 34*404b540aSrobert/* This note is used to get rid of an insn when it isn't safe to patch 35*404b540aSrobert the insn out of the chain. */ 36*404b540aSrobertINSN_NOTE (DELETED) 37*404b540aSrobert 38*404b540aSrobert/* Generated in place of user-declared labels when they are deleted. */ 39*404b540aSrobertINSN_NOTE (DELETED_LABEL) 40*404b540aSrobert 41*404b540aSrobert/* These are used to mark the beginning and end of a lexical block. 42*404b540aSrobert See NOTE_BLOCK and reorder_blocks. */ 43*404b540aSrobertINSN_NOTE (BLOCK_BEG) 44*404b540aSrobertINSN_NOTE (BLOCK_END) 45*404b540aSrobert 46*404b540aSrobert/* These mark the extremes of a loop. */ 47*404b540aSrobertINSN_NOTE (LOOP_BEG) 48*404b540aSrobertINSN_NOTE (LOOP_END) 49*404b540aSrobert 50*404b540aSrobert/* This note indicates the start of the real body of the function, 51*404b540aSrobert i.e. the point just after all of the parms have been moved into 52*404b540aSrobert their homes, etc. */ 53*404b540aSrobertINSN_NOTE (FUNCTION_BEG) 54*404b540aSrobert 55*404b540aSrobert/* This kind of note is generated at the end of the function body, 56*404b540aSrobert just before the return insn or return label. In an optimizing 57*404b540aSrobert compilation it is deleted by the first jump optimization, after 58*404b540aSrobert enabling that optimizer to determine whether control can fall 59*404b540aSrobert off the end of the function body without a return statement. */ 60*404b540aSrobertINSN_NOTE (FUNCTION_END) 61*404b540aSrobert 62*404b540aSrobert/* This marks the point immediately after the last prologue insn. */ 63*404b540aSrobertINSN_NOTE (PROLOGUE_END) 64*404b540aSrobert 65*404b540aSrobert/* This marks the point immediately prior to the first epilogue insn. */ 66*404b540aSrobertINSN_NOTE (EPILOGUE_BEG) 67*404b540aSrobert 68*404b540aSrobert/* These note where exception handling regions begin and end. 69*404b540aSrobert Uses NOTE_EH_HANDLER to identify the region in question. */ 70*404b540aSrobertINSN_NOTE (EH_REGION_BEG) 71*404b540aSrobertINSN_NOTE (EH_REGION_END) 72*404b540aSrobert 73*404b540aSrobert/* Generated whenever a duplicate line number note is output. 74*404b540aSrobert For example, one is output after the end of an inline function, 75*404b540aSrobert in order to prevent the line containing the inline call from 76*404b540aSrobert being counted twice in gcov. */ 77*404b540aSrobertINSN_NOTE (REPEATED_LINE_NUMBER) 78*404b540aSrobert 79*404b540aSrobert/* The location of a variable. */ 80*404b540aSrobertINSN_NOTE (VAR_LOCATION) 81*404b540aSrobert 82*404b540aSrobert/* Record the expected value of a register at a location. Uses 83*404b540aSrobert NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */ 84*404b540aSrobertINSN_NOTE (EXPECTED_VALUE) 85*404b540aSrobert 86*404b540aSrobert/* Record the struct for the following basic block. Uses 87*404b540aSrobert NOTE_BASIC_BLOCK. FIXME: Redundant with the basic block pointer 88*404b540aSrobert now included in every insn. */ 89*404b540aSrobertINSN_NOTE (BASIC_BLOCK) 90*404b540aSrobert 91*404b540aSrobert/* Mark the inflection point in the instruction stream where we switch 92*404b540aSrobert between hot and cold text sections. */ 93*404b540aSrobertINSN_NOTE (SWITCH_TEXT_SECTIONS) 94*404b540aSrobert 95*404b540aSrobert#undef INSN_NOTE 96