[Bug tree-optimization/69308] ifcombine joins together floating point expression with side effects

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69308

--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
This has nothing to do with signaling NaNs; ordered comparisons raise 
exceptions for quiet NaNs as well.