https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
--- Comment #2 from Zhendong Su <su at cs dot ucdavis.edu> --- (In reply to Mikael Pettersson from comment #1) > I can't reproduce on x86_64-linux with ether gcc-6 r230377, gcc-5 r230369, > or gcc-4.9 r230368. Mikael, not sure why you can't reproduce the miscompilation. I can still reproduce it with r230832 as shown below: $ gcc-trunk -v Using built-in specs. COLLECT_GCC=gcc-trunk COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-trunk/configure --prefix=/usr/local/gcc-trunk --enable-languages=c,c++ --disable-werror --enable-multilib Thread model: posix gcc version 6.0.0 20151114 (experimental) [trunk revision 230382] (GCC) $ $ gcc-trunk -O2 pr68328.c $ ./a.out 0 $ gcc-trunk -Os pr68328.c $ ./a.out $
