陳韋任 <che...@iis.sinica.edu.tw> writes: >> > 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 That documentation is out of date.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!
Sure: the document source is gcc/doc/cfg.texi. Thanks. Ian
