r176697 - in /trunk/gcc: ChangeLog dwarf2cfi.c ...

[rth@gcc.gnu.org]

Author: rth
Date: Sat Jul 23 19:58:46 2011
New Revision: 176697

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176697
Log:
dwarf2cfi: Introduce a dw_cfi_row state.

Use it instead of old_cfa, old_args_size, and cfa_remember variables.

Remove the global cfa variable, as it was usually a duplicate of
old_cfa and otherwise confusing.  Always make a local copy of the
cur_row->cfa variable before modification instead.

        * dwarf2cfi.c (dw_cfi_row, dw_cfi_row_ref): New.
        (cie_cfi_row): New.
        (new_cfi_row, copy_cfi_row, free_cfi_row): New.
        (cfa, old_cfa, cfa_remember, old_cfa_remember, old_args_size): Remove.
        (cur_row, remember_row): New.
        (def_cfa_1): Use cur_row instead of the old_* variables.
        (dwarf2out_frame_debug_restore_state): Similarly.
        (dwarf2out_args_size, dwarf2out_notice_stack_adjust): Likewise.
        (dwarf2out_frame_debug_def_cfa): Use a local variable instead of cfa.
        (dwarf2out_frame_debug_adjust_cfa): Likewise.
        (dwarf2out_frame_debug_cfa_offset): Likewise.
        (dwarf2out_frame_debug_expr): Likewise.
        (execute_dwarf2_frame): Set up cur_row.
        * dwarf2out.h (struct cfa_loc): Mark for GTY.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2cfi.c
    trunk/gcc/dwarf2out.h