[Bug middle-end/114700] Front-end optimization generates wrong code with -fsanitize=undefined

[lin1.hu at intel dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114700

--- Comment #14 from Hu Lin <lin1.hu at intel dot com> ---
Created attachment 57933
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57933&action=edit
Untested fix.