[Bug debug/51902] lexical_blocks inside inlined_subroutines generate duplicate debug_ranges

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51902

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-03-05 20:17:54 UTC ---
Author: jakub
Date: Mon Mar  5 20:17:44 2012
New Revision: 184958

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184958
Log:
    PR debug/51902
    * tree.h (BLOCK_SAME_RANGE): Define.
    * function.c (block_fragments_nreverse): Clear BLOCK_SAME_RANGE
    if BLOCK_FRAGMENT_CHAIN is non-NULL, but has it cleared.
    Also clear BLOCK_SAME_RANGE if fragment chain's supercontext fragment
    isn't equal to supercontext fragment's fragment chain.
    Adjust BLOCK_SUPERCONTEXT to point to supercontext fragment's
    fragment origin.
    (blocks_nreverse_all): Likewise.
    (reorder_blocks_1): Compute BLOCK_SAME_RANGE bits.  Set
    BLOCK_SUPERCONTEXT to supercontext fragment instead of
    supercontext fragment's fragment origin.
    * dwarf2out.c (add_high_low_attributes): If stmt has the same
    range as its parent (or parents thereof etc.), use the parent's
    DW_AT_ranges value instead of creating a new .debug_ranges range.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2out.c
    trunk/gcc/function.c
    trunk/gcc/tree.h