Hi! - http://gcc.gnu.org/ml/gcc-patches/2011-05/msg01182.html various debug info improvements (typed DWARF stack etc.) - http://gcc.gnu.org/ml/gcc-patches/2011-05/msg01246.html optimize away unneeded DW_OP_GNU_convert ops with typed DWARF stack - http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01669.html PR48688 optimization, I know Richard asked for trying it during combine, but that attempt failed due to opposite optimization
Jakub
