[Bug tree-optimization/68130] [6 Regression] gfortran.dg/ieee/ieee_2.f90 is miscomputed with '-Os -m32' on x86_64-apple-darwin14 after r228971

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68130

--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Created attachment 36607
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36607&action=edit
Dump file with -Os -m32 -fno-tree-pre -fdump-rtl-expand-details and r228971