------- Comment #5 from steven at gcc dot gnu dot org 2009-01-09 20:55 ------- Joern, re. comment #4, Richi refers to my patch to enable PRE at -Os, see [1]. An extension to this patch that we tested on x86 machines, is to disable PRE for scalar integer registers, via SMALL_REGISTER_CLASSES. I changed SMALL_REGISTER_CLASSES into a target hook for this purpose, see [2]. You could play with this, see if you can use this to cure your problem...
[1] http://gcc.gnu.org/ml/gcc-patches/2008-12/msg00199.html [2] http://gcc.gnu.org/ml/gcc-patches/2008-12/msg00590.html -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38785
