https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82028
--- Comment #1 from Josh Stone <jistone at redhat dot com> --- Fedora's mingw-gcc also produces code passing through xmm0: 0000000000000000 <foo>: 0: 55 push %rbp 1: 48 89 e5 mov %rsp,%rbp 4: f2 0f 11 45 10 movsd %xmm0,0x10(%rbp) 9: f2 0f 10 4d 10 movsd 0x10(%rbp),%xmm1 e: f3 0f 7e 05 00 00 00 movq 0x0(%rip),%xmm0 # 16 <foo+0x16> 15: 00 16: 66 0f 54 c1 andpd %xmm1,%xmm0 1a: f2 0f 11 45 10 movsd %xmm0,0x10(%rbp) 1f: f2 0f 10 45 10 movsd 0x10(%rbp),%xmm0 24: 5d pop %rbp 25: c3 retq $ x86_64-w64-mingw32-gcc -v Using built-in specs. COLLECT_GCC=x86_64-w64-mingw32-gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-w64-mingw32/7.1.0/lto-wrapper Target: x86_64-w64-mingw32 Configured with: ../configure --prefix=/usr --bindir=/usr/bin --includedir=/usr/include --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --build=x86_64-redhat-linux-gnu --host=x86_64-redhat-linux-gnu --with-gnu-as --with-gnu-ld --verbose --without-newlib --disable-multilib --disable-plugin --with-system-zlib --disable-nls --without-included-gettext --disable-win32-registry --enable-languages=c,c++,objc,obj-c++,fortran --with-bugurl=http://bugzilla.redhat.com/bugzilla --with-cloog --enable-threads=posix --enable-libgomp --target=x86_64-w64-mingw32 --with-sysroot=/usr/x86_64-w64-mingw32/sys-root --with-gxx-include-dir=/usr/x86_64-w64-mingw32/sys-root/mingw/include/c++ Thread model: posix gcc version 7.1.0 20170502 (Fedora MinGW 7.1.0-1.fc26) (GCC)
