[Bug c++/83170] ice in verify_use with -O3

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83170

--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---

Reduced C++ code seems to be:

int a;
enum bk { bm };
enum bn { bo };
enum { bp, bq, br, bs };
class d {
public:
  d();
  char b;
  void bv(char, bn);
  char bw[];
};
d::d() { bv(b, bo); }
short c;
void d::bv(char e, bn f) {
  bw[bp] = e;
  bw[bq] = f;
  bw[br] = c >> 8;
  bw[bs] = c;
}
class g {
  bool cb();
  long cc(bk, const char *, unsigned, char *, unsigned, int, int *);
  void cd(d *, int);
};
bool g::cb() {
  int *cg;
  char ch[1];
  cc(bm, nullptr, 0, ch, sizeof(ch), a, cg);
}
long g::cc(bk e, const char *, unsigned, char *, unsigned, int h, int *) {
  d cl;
  cl.bv(e, bo);
  cd(&cl, h);
}