[Bug tree-optimization/50693] Loop optimization restricted by GOTOs

["jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50693

--- Comment #25 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-11-05 19:58:41 UTC ---
Author: jakub
Date: Sat Nov  5 19:58:37 2011
New Revision: 181014

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181014
Log:
    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.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfglayout.c
    trunk/gcc/config/i386/i386.c
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/dwarf2out.c
    trunk/gcc/final.c
    trunk/gcc/gengtype.c
    trunk/gcc/insn-notes.def
    trunk/gcc/print-rtl.c
    trunk/gcc/tree-cfg.c
    trunk/gcc/var-tracking.c