5619e52cfb
PR tree-optimization/50693 * tree-cfg.c (gimple_can_merge_blocks_p): Allow merging with non-forced user labels. (gimple_merge_blocks): Turn non-forced user labels into debug bind stmt with the label as first operand and reset value. (gimple_duplicate_bb): Don't duplicate label debug stmts. * dwarf2out.c (gen_label_die): Handle NOTE_INSN_DELETED_DEBUG_LABEL. * final.c (final_scan_insn): Likewise. (rest_of_clean_state): Don't dump NOTE_INSN_DELETED_DEBUG_LABEL. * var-tracking.c (debug_label_num): New variable. (delete_debug_insns): Don't delete DEBUG_INSNs for LABEL_DECLs, instead turn them into NOTE_INSN_DELETED_DEBUG_LABEL notes. * cfglayout.c (skip_insns_after_block, duplicate_insn_chain): Handle NOTE_INSN_DELETED_DEBUG_LABEL. (duplicate_insn_chain): Don't duplicate LABEL_DECL DEBUG_INSNs. * insn-notes.def (DELETED_DEBUG_LABEL): New note kind. * print-rtl.c (print_rtx): Handle NOTE_INSN_DELETED_DEBUG_LABEL. * gengtype.c (adjust_field_rtx_def): Likewise. * config/i386/i386.c (ix86_output_function_epilogue): For MachO clear CODE_LABEL_NUMBER of NOTE_INSN_DELETED_DEBUG_LABEL if their are at the end of function and nop hasn't been emitted. * config/rs6000/rs6000.c (rs6000_output_function_epilogue): Likewise. From-SVN: r181014
89 lines
3.1 KiB
Modula-2
89 lines
3.1 KiB
Modula-2
/* Insn note definitions.
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Copyright (C) 2004, 2005, 2007, 2011 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 3, 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 COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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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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/* Similarly, but for labels that have been present in debug stmts
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earlier and thus will only appear with -g. These must use different
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label namespace. */
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INSN_NOTE (DELETED_DEBUG_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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/* 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 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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/* The location of a variable. */
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INSN_NOTE (VAR_LOCATION)
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/* The values passed to callee. */
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INSN_NOTE (CALL_ARG_LOCATION)
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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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/* When emitting dwarf2 frame information, contains a directive that
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should be emitted. */
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INSN_NOTE (CFI)
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/* When emitting dwarf2 frame information, contains the number of a debug
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label that should be emitted. */
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INSN_NOTE (CFI_LABEL)
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#undef INSN_NOTE
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