[Bug tree-optimization/58539] [4.7/4.8/4.9 Regression] ICE with segfault at -O3 with -g enabled on x86_64-linux-gnu

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58539

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-09-26
                 CC|                            |mpolacek at gcc dot gnu.org
            Summary|ICE with segfault at -O3    |[4.7/4.8/4.9 Regression]
                   |with -g enabled on          |ICE with segfault at -O3
                   |x86_64-linux-gnu (affecting |with -g enabled on
                   |trunk, 4.8, and 4.7)        |x86_64-linux-gnu
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.  With trunk:
a.c: In function âbarâ:
a.c:10:6: internal compiler error: gimple check: expected
gimple_phi(error_mark), have gimple_debug() in gimple_phi_result_ptr, at
gimple.h:3561
 void bar ()
      ^
0x76ca07 gimple_check_failed
    /home/marek/src/gcc/gcc/gimple.c:1162
0x4db50c gimple_phi_result_ptr
    /home/marek/src/gcc/gcc/gimple.h:3561
0xae12c6 gimple_phi_result_ptr
    /home/marek/src/gcc/gcc/gimple.h:3561
0x4dce1e vect_create_epilog_for_reduction
    /home/marek/src/gcc/gcc/tree-vect-loop.c:4564
0xaed650 vectorizable_reduction(gimple_statement_d*, gimple_stmt_iterator_d*,
gimple_statement_d**, _slp_tree*)
    /home/marek/src/gcc/gcc/tree-vect-loop.c:5281
0xae003a vect_transform_stmt(gimple_statement_d*, gimple_stmt_iterator_d*,
bool*, _slp_tree*, _slp_instance*)
    /home/marek/src/gcc/gcc/tree-vect-stmts.c:5988
0xae40dd vect_transform_loop(_loop_vec_info*)
    /home/marek/src/gcc/gcc/tree-vect-loop.c:5859
0xaff270 vectorize_loops()
    /home/marek/src/gcc/gcc/tree-vectorizer.c:367