[Bug target/106097] undefined behaviors regarding integer shifts in loongarch_build_integer

[chenglulu at loongson dot cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106097

--- Comment #6 from chenglulu <chenglulu at loongson dot cn> ---
Created attachment 53205
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53205&action=edit
0001-Fix-bug-for-PR16097.patch