[Bug tree-optimization/126720] [15/16/17 Regression] wrong code with -O3 since r15-2275

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126720

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note, the testcase is little-endian specific.