parser modification followup

[Santiago Margareto]

After some research I have found that it won't be necessary to change the
gcc parser. In some places in the gcc docs it is said that you can interface
with the gcc back-end with the tree (tree.c) or RTL file (rtc.c). I can
generate the RTL file, and the try to parse it. However, is there a way to
generate the 'tree file' - something that I can parse/traverse with the tree
data-structure?

Thanks