https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99234
--- Comment #5 from Vadim Zeitlin <vz-gcc at zeitlins dot org> --- > Works fine on x86_64-linux. Yes, I mentioned this :-/ > Can you attach preprocessed source (most developers don't have access to > Windows) If you can install MinGW cross-compiler and Wine, you don't need Windows to reproduce this, but here is the (compressed, as it's unfortunately quite big after the standard headers expansion) preprocessed output. > and -fdump-tree-optimized dump Also attached. > and assembly you get? Attached too. The register I mentioned in the original message is xmm6. Thanks for looking at this!