[Bug go/63812] Compilation error due to a large floating point constant truncated to integer

[e29253 at jp dot ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63812

--- Comment #2 from Tatsushi Inagaki <e29253 at jp dot ibm.com> ---
(In reply to Andrew Pinski from comment #1)
> This might be an issue in mpfr and not GCC if I read GCC's code correctly. 
> Depending on how 2.22 is read in as a floating point value.

Andrew,

Thank you very much for your helpful comments. Our MPFR library is 3.1.2. I
applied the cumulative patch on http://www.mpfr.org/mpfr-current/allpatches,
but it did not solve the original problem, unfortunately. How can we identify
this is an inherent limitation or a potential bug of MPFR? Any suggestions
greatly help us.