https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78411
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> --- The test fails for me as well (that's how I noticed it). This is on trunk, with a straightforward build with -mtune=generic and -march=x86-64 passed by the driver. But it only fails on one of my machines (my laptop) and not on the other. I know yet what's different between two that triggers it.