[Bug c++/111482] New: ice in lower_bound with -O3

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111482

            Bug ID: 111482
           Summary: ice in lower_bound with -O3
           Product: gcc
           Version: unknown
            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 55934
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55934&action=edit
gzipped C++ source code

Given the attached C++ code and compiler flag -O3, recent gcc does
this:

during GIMPLE pass: vrp
bicgstab.cpp: In member function ‘QuantLib::BiCGStabResult
QuantLib::BiCGstab::solve(const QuantLib::Array&, const QuantLib::Array&)
const’:
bicgstab.cpp:37:20: internal compiler error: in lower_bound, at
value-range.h:1078
0xd452bb irange::lower_bound(unsigned int) const
        ../../trunk.year/gcc/value-range.h:1078
0x1800346 gimple_simplify_EXACT_DIV_EXPR(gimple_match_op*, gimple**, tree_node*
(*)(tree_node*), code_helper, tree_node*, tree_node*, tree_node*)
        /home/dcb38/gcc/working/gcc/gimple-match-9.cc:8878

git range seems to be g:a335cf241b93ae9e .. g:fe0f9e0941304748,
a range of 48 commits.

I have a reduction running, but since this is C++, I am not expecting
fast results.