[Bug target/63908] [e500v2] "float_bessel"case failed on e500v2 platforms

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63908

--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
In such a case you need to debug the system as a whole until you have 
isolated the bug to one component and can then report it to that component 
with evidence for where the bug is.

It's quite possible pthread_exit could run into unwind info problems - 
make sure you have Olivier Hainque's patches 
<https://gcc.gnu.org/ml/gcc-patches/2014-11/msg02975.html> backported, 
together with my fix

2014-10-25  Joseph Myers  <joseph@codesourcery.com>

        * config/rs6000/rs6000.c (rs6000_hard_regno_nregs_internal): Do
        not allow e500 double in registers not satisyfing
        SPE_SIMD_REGNO_P.

before unwinding will work for e500v2 with 4.9.