I'm seeing a bug resulting in random/non-repeatable outputs that arises when I use "-parallel" in conjunction with "-xSSE3" or any higher SSE instruction set. Not using the auto-parallel flag works fine with any SSE (first noticed with -xHost), and using -parallel with -xSSE2 also produces correct output. I'm seeing this with ifort 13.1.3 as well as the x3_2013.1.117 version. CPU is an intel i5-750 (has SSE4.2), running on x64 ubuntu.
It'll likely take me considerably more time to locate the offending source so as to give a reproducible error, so I thought I'd ask here first in case someone has seen this quirk before. Any idea as to the cause of something like this, and/or where to start looking?