[Bug c++/86240] New: ice: unexpected expression absu_expr

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86240

            Bug ID: 86240
           Summary: ice: unexpected expression absu_expr
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Somewhere between revisions 261680 and 261730, this C++ code
causes trouble:

extern "C" int abs(int);
class a {
public:
  short b;
};
short c;
void d() {
  a e;
  abs(c) >= e.b;
}

$ ~/gcc/results.261730/bin/gcc -c -w bug447.cc
bug447.cc: In function ‘void d()’:
bug447.cc:9:15: internal compiler error: unexpected expression ‘#‘absu_expr’
not supported by dump_expr#<expression error>’ of kind absu_expr
   abs(c) >= e.b;
               ^
0x822d5d cxx_eval_constant_expression
        ../../trunk/gcc/cp/constexpr.c:4815
0x820019 cxx_eval_constant_expression
        ../../trunk/gcc/cp/constexpr.c:4612
0x820019 cxx_eval_constant_expression
        ../../trunk/gcc/cp/constexpr.c:4612