[Bug target/50164] [IRA, 4.7 Regression] Performance degradation due to increased memory instructions count

[enkovich.gnu at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50164

--- Comment #8 from Ilya Enkovich <enkovich.gnu at gmail dot com> 2011-08-30 10:50:44 UTC ---
I attached a fixed reproducer. It is closer to the original test and has higher
registers pressure then the previous version. It has the same problem as the
first reproducer. 

Reproduced with GCC 4.7.0 20110828 and options "-O2 -m32 -march=atom". Code
becomes faster on both Atom (~10%) and Core (~35%) if I use just "-O2 -m32".