[Bug target/123117] LoongArch: wrong code at -O1/O2/O3

[xry111 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123117

--- Comment #5 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
But on my system with -O0 it's 0x000000009e47d3d2, and at -O1 it's
0xffffffff9e47d3d2.