[Bug c/81118] New: ice in remove_redundant_iv_tests

["dcb314 at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81118

            Bug ID: 81118
           Summary: ice in remove_redundant_iv_tests
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 41576
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41576&action=edit
gzipped C source code

The attached C code, when compiled by today's trunk and compiler flag -O3,
does this:

gui.c: In function ‘parse_slabinfo’:
gui.c:2123:5: internal compiler error: Segmentation fault
0xc4b3af crash_signal
        ../../trunk/gcc/toplev.c:338
0xdb25ae remove_redundant_iv_tests
        ../../trunk/gcc/tree-ssa-loop-ivcanon.c:566
0xdb25ae canonicalize_loop_induction_variables
        ../../trunk/gcc/tree-ssa-loop-ivcanon.c:1191
0xdb4550 canonicalize_induction_variables()
        ../../trunk/gcc/tree-ssa-loop-ivcanon.c:1222
Please submit a full bug report,

I'll have my usual go at reducing the code and finding a
range of revisions for the bug.