https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63661
mednafen at gmail dot com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mednafen at gmail dot com --- Comment #19 from mednafen at gmail dot com --- Created attachment 33870 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33870&action=edit Simplified testcase. Simplified testcase, tested to be broken on x86_64 Linux. $ /usr/local/gcc-4.9.2/bin/gcc -O2 -fpic -o testcase-alt testcase-alt.c && ./testcase-alt A: 0x00007fffd8416f60 B: 0x4014000000000000 ---- 5 $ /usr/local/gcc-4.9.2/bin/gcc -O2 -fpic -mtune=nehalem -o testcase-alt testcase-alt.c && ./testcase-alt A: 0x00007fffc9fb1730 B: 0x00007fffc9fb1730 ---- 6.95331e-310 Aborted