[Bug tree-optimization/58318] very slow compilation on x86_64-linux with -O3 and -g and checking enabled

[su at cs dot ucdavis.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58318

--- Comment #3 from Zhendong Su <su at cs dot ucdavis.edu> ---
> A quick check with a non-bootstrapped cc1 but release checking makes the
> slowdown go away.

Richard, there is related testcase that I have just reported (58479). It
manifests also under release checking. Thanks.