Re: x86-linux bootstrap broken on mainline?

[Jan Hubicka <jh at suse dot cz>]

> stage1/xgcc -Bstage1/ -B/home/guerby/work/gcc/install/install-20050616T132922/i686-pc-linux-gnu/bin/ -c   -O2 -g -fomit-frame-pointer -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros -Wold-style-definition -Werror -fno-common   -DHAVE_CONFIG_H    -I. -I. -I/home/guerby/work/gcc/version-head/gcc -I/home/guerby/work/gcc/version-head/gcc/. -I/home/guerby/work/gcc/version-head/gcc/../include -I/home/guerby/work/gcc/version-head/gcc/../libcpp/include  \
>         /home/guerby/work/gcc/version-head/gcc/config/i386/i386.c -o i386.o
> /home/guerby/work/gcc/version-head/gcc/config/i386/i386.c: In function 'ix86_expand_builtin':
> /home/guerby/work/gcc/version-head/gcc/config/i386/i386.c:15127: internal compiler error: Segmentation fault
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <URL:http://gcc.gnu.org/bugs.html> for instructions.
> make[2]: *** [i386.o] Error 1
> 
> It looks like the only patch between my last successful bootstrap and the current failure is
> the following, am I alone in seeing this?

Can I have backtrace?  Both patches was bootstrapped/regtested on i686
so everything shall be fine.  I am double checking now.  I also received
reports from memory tester so it's build apparently passed too.

Honza
> 
> Laurent
> 
> $ cvs diff -u -D 'Wed Jun 15 21:20:45 UTC 2005' -D 'Thu Jun 16 11:26:54 UTC 2005' ChangeLog
> Index: ChangeLog
> ===================================================================
> RCS file: /cvs/gcc/gcc/gcc/ChangeLog,v
> retrieving revision 2.9159
> retrieving revision 2.9161
> diff -u -r2.9159 -r2.9161
> --- ChangeLog   15 Jun 2005 20:13:04 -0000      2.9159
> +++ ChangeLog   16 Jun 2005 10:31:51 -0000      2.9161
> @@ -1,3 +1,59 @@
> +2005-06-16  Jan Hubicka  <jh@suse.cz>
> +
> +       * basic-block.h (rtl_bb_info): Break out head_, end_,
> +       global_live_at_start, global_live_at_end from ...
> +       (basic_block_def): ... here; update all references
> +       (BB_RTL): New flag.
> +       (init_rtl_bb_info): Declare.
> +       * cfgexpand.c (expand_gimple_basic_block): Init bb info, set BB_RTL
> +       flag.
> +       * cfgrtl.c: Include ggc.h
> +       (create_basic_block_structure): Init bb info.
> +       (rtl_verify_flow_info_1): Check BB_RTL flag and rtl_bb_info pointer.
> +       (init_rtl_bb_info): New function.
> +       (rtl_merge_block, cfglayout_merge_block): Copy global_live_at_end here.
> +       * cfghooks.c (merge_block): Do not copy global_live_at_end here.
> +       * cfg.c (clear_bb_flags): Skip BB_RTL flag.
> +       (dump_flow_info): Gueard global_live_* dumping.
> +
> +       * Makefile.in (cfg.o): Add new dependencies.
> +       * basic-block.h (reorder_block_def): Kill
> +       original/copy/duplicated/copy_number fields.
> +       (BB_DUPLICATED): New flag.
> +       (initialize_original_copy_tables, free_original_copy_tables,
> +       set_bb_original, get_bb_original, set_bb_copy, get_bb_copy): New.
> +       * cfg.c: Include hashtab.h and alloc-pool.h
> +       (bb_original, bb_copy, original_copy_bb_pool): New static vars.
> +       (htab_bb_copy_original_entry): New struct.
> +       (bb_copy_original_hash, bb_copy_original_eq): New static functions.
> +       (initialize_original_copy_tables, free_original_copy_tables,
> +       set_bb_original, get_bb_original, set_bb_copy, get_bb_copy): New
> +       global functions.
> +       * cfghooks.c (duplicate_block): Update original/copy handling.
> +       * cfglayout.c (fixup_reorder_chain): Likewise.
> +       (cfg_layout_initialize): Initialize orignal_copy tables.
> +       (cfg_layout_finalize): FInalize original_copy tables.
> +       (can_copy_bbs_p): Use BB_DUPLICATED flag.
> +       (copy_bbs): Likewise.
> +       * cfgloopmanip.c (update-single_exits_after_duplication): Likewise.
> +       (duplicate_loop_to_header_edge): Likewise; update handling of
> +       copy_number.
> +       (loop_version): Likewise.
> +       * dominance.c (get_dominated_by_region): Use BB_DUPLICATED_FLAG.
> +       * except.c (expand_resx_expr): Check that reg->resume is not set.
> +       * loop-unroll.c (unroll_loop_constant_iterations,
> +       unroll_loop_runtime_iterations, apply_opt_in_copies): Update
> +       copy/original handling.
> +       * loop-unwitch.c (unswitch_loop): Likewise.
> +       * tree-cfg.c (create_bb): Do not initialize RBI.
> +       (disband_implicit_edges): Do not kill RBI.
> +       (add_phi_args_after_copy_bb): Use new original/copy mapping.
> +       (add_phi_args_after_copy): Use BB_DUPLICATED flag.
> +       (tree_duplicate_sese_region): Update original/copy handling.
> +       * tree-ssa-loop-ivcanon.c (try_unroll_loop_completely): Likewise.
> +       * tree-ssa-loop-manip.c (copy_phi_node_args): Likewise.
> +       * tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Likewise.
> +
>