[Bug rtl-optimization/53533] [4.7/4.8 regression] vectorization causes loop unrolling test slowdown as measured by Adobe's C++Benchmark

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53533

--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-06-15 
09:03:04 UTC ---
This started with http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173856
The current cost model is seriously insufficient.