http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52762
Andi Kleen <andi-gcc at firstfloor dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |andi-gcc at firstfloor dot | |org --- Comment #7 from Andi Kleen <andi-gcc at firstfloor dot org> 2012-03-30 19:21:19 UTC --- Happens in java script, which does JITed code. My guess is that one of the transition points between JITed code and C code does not save AVX registers correctly or something like that. I would file it with mozilla.org, it's more likely their bug.