[Bug tree-optimization/50904] [4.7 regression] pessimization when -fno-protect-parens is enabled by -Ofast

[venkataramanan.kumar.gnu at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50904

--- Comment #16 from Venkataramanan Kumar <venkataramanan.kumar.gnu at gmail dot com> 2011-11-19 04:25:27 UTC ---
(In reply to comment #13)
> (In reply to comment #12)
> > Created attachment 25764 [details]
> > Tentative fix (3)
> > Final version.  Can someone try it on his favorite Fortran benchmark?
> Ok I will check and let you know the results.

Hi Eric, 

I tested on machine with -march=amdfam10, with your patch induct run time
improves by ~5%. Other benchmarks are not affected much. 

With your patch, CPU2006 benchmark "416.gamess" fails during validation.
Mimimal flag -O3 -fno-tree-pre -mfma4. I am trying to reduce the test case.
Please let me know if you have any other suggestions.