[mmozeiko]

To me it looks like something related to some other optimization pass (I don't know much about gcc passes). But not related to writes to memory. Here are two writes both using cmov (on different code): https://godbolt.org/z/n3dTrPo6e

Edit: compiling your code without modifications, but with `-Os` also gives two cmov's: https://godbolt.org/z/r86azb7be