[Bug tree-optimization/58248] [4.9 Regression] wrong code at -O3 on x86_64-linux-gnu

[su at cs dot ucdavis.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58248

--- Comment #10 from Zhendong Su <su at cs dot ucdavis.edu> ---
(In reply to Jakub Jelinek from comment #9)
> For testing bugs against trunk it is better to omit both --disable-checking
> and --enable-checking=release and just use the default.
> Because otherwise the compiler doesn't perform various verifications and you
> could see a miscompilation which would otherwise be caught already at
> compile time.

Okay, thanks Jakub.