> > At the end of the link belows, > > > > http://gcc.gnu.org/onlinedocs/gccint/Maintaining-the-CFG.html#Maintaining-the-CFG > > > > It says, > > > > "Note that at present, the representation of control flow in the tree > > representation is discarded before expanding to RTL. Long term the CFG > > should be maintained and "expanded" to the RTL representation along > > with the function tree itself." > > > > Does this mean in the end of GCC compilation, the CFG information is > > lost? Thanks! > > That documentation is out of date. The CFG is now retained through most > of the RTL passes.
The comment on function gimple_expand_cfg in gcc/cfgexpand.c prove the document is wrong, right? "We do conversion per basic block and preserve/update the tree CFG. This implies we have to do some magic as the CFG can simultaneously consist of basic blocks containing RTL and GIMPLE trees." Is there a way for me to correct the document? Thanks! Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667
