[Bug tree-optimization/114464] [14 regression] ICE when building tdscpp-20240212

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114464

--- Comment #3 from Sam James <sjames at gcc dot gnu.org> ---
Reduced:
```
template <int N> void double_to_int(double, unsigned char *scratch, bool carry)
{
  for (int i = 0; i < N; i++) {
    bool b = scratch[i] <<= 1;
    if (carry)
      scratch[i] |= 1;
    carry = b;
  }
}
double bcp_row_data_d;
unsigned char bcp_row_data_ptr;
bool carry;
void bcp_row_data() { double_to_int<16>(bcp_row_data_d, &bcp_row_data_ptr,
carry); }
```