If you visit the following: http://gcc.gnu.org/gcc-4.0/changes.html
a reference is found to value range propagation pass. However, $GCCHOME/gcc directory doesn't contain the required files (e.g. tree-vrp.c). Is this an addition for a scheduled (pre)release or i just can't find it in the released gcc-4.0.0 ?? thanks Nikolaos Kavvadias