[Bug target/63661] [4.9/5 Regression] -O2 miscompiles with -mtune=nehalem or corei7

[vbraun.name at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63661
--- Comment #26 from Volker Braun <vbraun.name at gmail dot com> ---
I can confirm that r217783 fixes the original issue on in the GSL testsuite on
OSX Yosemite, too.