[Bug sanitizer/65148] ICE: in get_biv_step, at loop-iv.c:823

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65148

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |msebor at gcc dot gnu.org

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I can reproduce the ICE with 4.9.2 but not 5.0.

$ /build/gcc-4.9.2/gcc/xg++ -B/build/gcc-4.9.2/gcc -fsanitize=undefined -O2 -c
u.c
u.c: In function âvoid fn1()â:
u.c:7:1: internal compiler error: in get_biv_step, at loop-iv.c:823
 }
 ^
0x1054dd13 get_biv_step
    /src/gcc-4.9.2/gcc/loop-iv.c:823
0x1054dd13 iv_analyze_biv
    /src/gcc-4.9.2/gcc/loop-iv.c:912
0x1054e06b iv_analyze_op
    /src/gcc-4.9.2/gcc/loop-iv.c:1187
0x1054f303 iv_number_of_iterations
    /src/gcc-4.9.2/gcc/loop-iv.c:2354
0x1054f303 check_simple_exit
    /src/gcc-4.9.2/gcc/loop-iv.c:2920
0x1054f303 find_simple_exit(loop*, niter_desc*)
    /src/gcc-4.9.2/gcc/loop-iv.c:2945
0x10550893 get_simple_loop_desc(loop*)
    /src/gcc-4.9.2/gcc/loop-iv.c:3026
0x10bd13f3 doloop_optimize
    /src/gcc-4.9.2/gcc/loop-doloop.c:616
0x10bd13f3 doloop_optimize_loops()
    /src/gcc-4.9.2/gcc/loop-doloop.c:741
0x1054450f rtl_doloop
    /src/gcc-4.9.2/gcc/loop-init.c:661
0x1054450f execute
    /src/gcc-4.9.2/gcc/loop-init.c:692
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