[Bug c/58485] [4.9 Regression] GMP test on subnormal fails with LTO and -O3

[vincent-gcc at vinc17 dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58485

--- Comment #1 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
I forgot:

  Version:           GNU MP 5.1.2
  Host type:         coreinhm-unknown-linux-gnu
  ABI:               64
  Install prefix:    /usr/local
  Compiler:          gcc-snapshot -std=gnu99
  Static libraries:  yes
  Shared libraries:  no

(x86_64).