https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67153
ncm at cantrip dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |Linux amd64
Known to work| |4.9.2
Host| |Linux amd64
Version|5.1.0 |5.1.1
Known to fail| |5.1.1
Build| |Linux amd64
--- Comment #2 from ncm at cantrip dot org ---
The 4.9.2 release, "Debian 4.9.2-10", does not exhibit this bug. When built
with g++-4.9, the unsigned int version is slightly faster than the
std::bitset<>
version. The g++-5 release used was "Debian 5.1.1-9 20150602".
The Haswell host is running under a virtualbox VM, with /proc/cpuinfo
reporting stepping 3, microcode 0x19, and flags: fpu vme de pse tsc msr
pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2
ht syscall nx rdtscp lm constant_tsc rep_good nopl pni ssse3 lahf_lm
The compiler used for the test on the Westmere M520, that appears not to
exhibit the bug, was a snapshot "g++ (GCC) 6.0.0 20150504".
