https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53712
--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Marco Leise from comment #9) > If this was fixed three years ago, then how does the same test program > produce this assembly with gcc 5.2.0 (and earlier)? Because the test program in comment #0 is invalid. What was allowed instead is using an unaligned load and then using the other intrinsic and that is what the bug changed into. > > Dump of assembler code for function test: > 0x0000000000400596 <+0>: push rbp > 0x0000000000400597 <+1>: mov rbp,rsp > 0x000000000040059a <+4>: mov QWORD PTR [rbp-0x28],rdi > 0x000000000040059e <+8>: mov QWORD PTR [rbp-0x30],rsi > 0x00000000004005a2 <+12>: mov rax,QWORD PTR [rbp-0x30] > 0x00000000004005a6 <+16>: mov QWORD PTR [rbp-0x18],rax > 0x00000000004005aa <+20>: mov rax,QWORD PTR [rbp-0x18] > 0x00000000004005ae <+24>: movdqu xmm0,XMMWORD PTR [rax] > 0x00000000004005b2 <+28>: movaps XMMWORD PTR [rbp-0x10],xmm0 > 0x00000000004005b6 <+32>: mov rax,QWORD PTR [rbp-0x28] > => 0x00000000004005ba <+36>: movdqa xmm0,XMMWORD PTR [rax] > 0x00000000004005be <+40>: movdqa xmm1,xmm0 > 0x00000000004005c2 <+44>: movdqa xmm0,XMMWORD PTR [rbp-0x10] > 0x00000000004005c7 <+49>: pcmpistri xmm0,xmm1,0x0 > 0x00000000004005cd <+55>: mov eax,ecx > 0x00000000004005cf <+57>: pcmpistrm xmm0,xmm1,0x0 > 0x00000000004005d5 <+63>: pop rbp > 0x00000000004005d6 <+64>: ret > > gcc -v > Using built-in specs. > COLLECT_GCC=/usr/x86_64-pc-linux-gnu/gcc-bin/5.2.0/gcc > COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/5.2.0/lto-wrapper > Target: x86_64-pc-linux-gnu > Configured with: > /var/tmp/portage/sys-devel/gcc-5.2.0/work/gcc-5.2.0/configure > --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr > --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/5.2.0 > --includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/5.2.0/include > --datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/5.2.0 > --mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/5.2.0/man > --infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/5.2.0/info > --with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/5.2.0/include/g++-v5 > --with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/5.2.0/python > --enable-languages=c,c++ --enable-obsolete --enable-secureplt > --disable-werror --with-system-zlib --enable-nls --without-included-gettext > --enable-checking=release --with-bugurl=https://bugs.gentoo.org/ > --with-pkgversion='Gentoo 5.2.0 p1.1, pie-0.6.4' --enable-libstdcxx-time > --enable-shared --enable-threads=posix --enable-__cxa_atexit > --enable-clocale=gnu --enable-multilib --with-multilib-list=m32,m64 > --disable-altivec --disable-fixed-point --enable-targets=all > --disable-libgcj --enable-libgomp --disable-libmudflap --disable-libssp > --disable-libcilkrts --disable-libquadmath --enable-lto --without-isl > --enable-libsanitizer > Thread model: posix > gcc version 5.2.0 (Gentoo 5.2.0 p1.1, pie-0.6.4)
