[Bug rtl-optimization/50588] gcc produce incorrect inlined code with -march=athlon -O2

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50588

--- Comment #18 from Mikael Pettersson <mikpelinux at gmail dot com> ---
This is now fixed for 4.8+ by Eric's PR60452 patch.  Verified by backporting
that to 4.6.4 and seeing the bug on this PR's test case go away.