[Bug debug/49864] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2439

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49864

--- Comment #5 from Richard Henderson <rth at gcc dot gnu.org> 2011-08-02 22:18:38 UTC ---
Author: rth
Date: Tue Aug  2 22:18:35 2011
New Revision: 177218

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=177218
Log:
PR target/49864
    * reg-notes.def (REG_ARGS_SIZE): New.
    * calls.c (emit_call_1): Emit REG_ARGS_SIZE for call_pop.
    (expand_call): Add REG_ARGS_SIZE to emit_stack_restore.
    * cfgcleanup.c (old_insns_match_p): Don't allow cross-jumping to
    different stack levels.
    * combine-stack-adj.c (adjust_frame_related_expr): Remove.
    (maybe_move_args_size_note): New.
    (combine_stack_adjustments_for_block): Use it.
    * combine.c (distribute_notes): Place REG_ARGS_SIZE.
    * dwarf2cfi.c (dw_cfi_row_struct): Remove args_size member.
    (dw_trace_info): Add beg_true_args_size, end_true_args_size,
    beg_delay_args_size, end_delay_args_size, eh_head, args_size_undefined.
    (cur_cfa): New.
    (queued_args_size): Remove.
    (add_cfi_args_size): Assert size is non-negative.
    (stack_adjust_offset, dwarf2out_args_size): Remove.
    (dwarf2out_stack_adjust, dwarf2out_notice_stack_adjust): Remove.
    (notice_args_size, notice_eh_throw): New.
    (dwarf2out_frame_debug_def_cfa): Use cur_cfa.
    (dwarf2out_frame_debug_adjust_cfa): Likewise.
    (dwarf2out_frame_debug_cfa_offset): Likewise.
    (dwarf2out_frame_debug_expr): Likewise.  Don't stack_adjust_offset.
    (dwarf2out_frame_debug): Don't handle non-frame-related-p insns.
    (change_cfi_row): Don't emit args_size.
    (maybe_record_trace_start_abnormal): Split out from ...
    (maybe_record_trace_start): Here.  Set args_size_undefined.
    (create_trace_edges): Update to match.
    (scan_trace): Handle REG_ARGS_SIZE.
    (connect_traces): Connect args_size between EH insns.
    * emit-rtl.c (try_split): Handle REG_ARGS_SIZE.
    * explow.c (suppress_reg_args_size): New.
    (adjust_stack_1): Split out from ...
    (adjust_stack): ... here.
    (anti_adjust_stack): Use it.
    (allocate_dynamic_stack_space): Suppress REG_ARGS_SIZE.
    * expr.c (mem_autoinc_base): New.
    (fixup_args_size_notes): New.
    (emit_single_push_insn_1): Rename from emit_single_push_insn.
    (emit_single_push_insn): New.  Generate REG_ARGS_SIZE.
    * recog.c (peep2_attempt): Handle REG_ARGS_SIZE.
    * reload1.c (reload_as_needed): Likewise.
    * rtl.h (fixup_args_size_notes): Declare.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/calls.c
    trunk/gcc/cfgcleanup.c
    trunk/gcc/combine-stack-adj.c
    trunk/gcc/combine.c
    trunk/gcc/dwarf2cfi.c
    trunk/gcc/emit-rtl.c
    trunk/gcc/explow.c
    trunk/gcc/expr.c
    trunk/gcc/recog.c
    trunk/gcc/reg-notes.def
    trunk/gcc/reload1.c
    trunk/gcc/rtl.h