[Bug debug/48190] [regression?] Huge memory use while compiling qemu-0.4.0

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48190

--- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 2011-11-25 10:44:01 UTC ---
Author: rsandifo
Date: Fri Nov 25 10:43:58 2011
New Revision: 181717

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181717
Log:
gcc/
    Backport from mainline:

    2011-03-29  Richard Sandiford  <richard.sandiford@linaro.org>

    PR debug/48190
    * dwarf2out.c (dw_loc_list_node): Add resolved_addr and replaced.
    (cached_dw_loc_list_def): New structure.
    (cached_dw_loc_list): New typedef.
    (cached_dw_loc_list_table): New variable.
    (cached_dw_loc_list_table_hash): New function.
    (cached_dw_loc_list_table_eq): Likewise.
    (add_location_or_const_value_attribute): Take a bool cache_p.
    Cache the list when the parameter is true.
    (gen_formal_parameter_die): Update caller.
    (gen_variable_die): Likewise.
    (dwarf2out_finish): Likewise.
    (dwarf2out_abstract_function): Nullify cached_dw_loc_list_table
    while generating debug info for the decl.
    (dwarf2out_function_decl): Clear cached_dw_loc_list_table.
    (dwarf2out_init): Initialize cached_dw_loc_list_table.
    (resolve_addr): Cache the result of resolving a chain of
    location lists.

    From: 2010-10-12  Jakub Jelinek  <jakub@redhat.com>
    * dwarf2out.c (dw_loc_list_node): Add emitted field.
    (output_loc_list): Return immediately if emitted is set, set it.

Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/dwarf2out.c