Re: [Bug c++/91420] relocation truncated to fit: R_RISCV_HI20 against `.LC0' with GCC 8.2/8.3 with "-O2" on RISC-V

[Andrew Waterman]

In -O2, the compiler materializes ("x" + INT_MIN) by loading that
symbol+offset into a register in one shot, whereas in -O0 it loads the
address of "x" into a register, then adds INT_MIN to that register.
The same phenomenon happens in the x86-64 -mcmodel=kernel case.