Please find the summary of the loop optimizations BOF here: http://gcc.gnu.org/wiki/LoopOptimizationsBOF.
We've also updated the Vectorizer Todo wiki page (http://gcc.gnu.org/wiki/VectorizationTasks) and the Loop Optimizations wiki page (http://gcc.gnu.org/wiki/LoopOptTasks). Thanks to everyone who attended the BOF! Dorit, Zdenek, Sebastian, Harsha and Ira.