Dear GCC Developers, I am currently trying to get familiar with basic functionalities (and their implementation) of the GCC (cc1). After generating the GIMPLE representation of the Input-Parse-Tree a huge number of optimisation passes takes place. These passes are said to be hardware independent. However I am wondering, whether there are maybe also some passes which make use of machine descriptions. I am thinking about some Loop-Optimisations which can be performed much better if the appropriate optimisation pass knows if there are vector machine instructions. This would allow to parallelize the loop. (Tree level if-conversion for vectorizer) Are there also some other optimisation passes working on the GIMPLE/SSA representation which make use of any machine-dependent features?
Thanks for help, Markus Franke
